US20130184531A1 - Endoscope adapter including light emitting diode, and adapter type endoscope - Google Patents
Endoscope adapter including light emitting diode, and adapter type endoscope Download PDFInfo
- Publication number
- US20130184531A1 US20130184531A1 US13/661,450 US201213661450A US2013184531A1 US 20130184531 A1 US20130184531 A1 US 20130184531A1 US 201213661450 A US201213661450 A US 201213661450A US 2013184531 A1 US2013184531 A1 US 2013184531A1
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- United States
- Prior art keywords
- adapter
- distal end
- endoscope
- connection portion
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00002—Operational features of endoscopes
- A61B1/00059—Operational features of endoscopes provided with identification means for the endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00096—Optical elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00105—Constructional details of the endoscope body characterised by modular construction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00112—Connection or coupling means
- A61B1/00121—Connectors, fasteners and adapters, e.g. on the endoscope handle
- A61B1/00124—Connectors, fasteners and adapters, e.g. on the endoscope handle electrical, e.g. electrical plug-and-socket connection
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
- A61B1/00177—Optical arrangements characterised by the viewing angles for 90 degrees side-viewing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0676—Endoscope light sources at distal tip of an endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0684—Endoscope light sources using light emitting diodes [LED]
Definitions
- the present invention relates to an endoscope adapter including a light emitting diode, and to an adapter type endoscope configured by connecting the endoscope adapter.
- the observation object of the endoscope is the inside of a living body, a pipe, and the like. Therefore, when an endoscopic examination is performed, a light source for illuminating the observation object is needed.
- a light source apparatus which supplies illumination light is prepared as an external apparatus of the endoscope. The illumination light emitted by the light source apparatus is supplied to a light guide provided in an insertion portion of the endoscope, and is transmitted to the distal end portion of the insertion portion via the light guide. Then, the illumination light is emitted towards the observation object from an illumination window arranged at the insertion portion distal end portion.
- an endoscope which, instead of transmitting the illumination light emitted by the light source apparatus to the distal end portion of the insertion portion via the light guide, is configured to have a light emitting device such as a light emitting diode (hereinafter abbreviated as LED) provided at the distal end portion of the insertion portion, and to illuminate the observation object with the light emitted by the light emitting device.
- a light emitting device such as a light emitting diode (hereinafter abbreviated as LED) provided at the distal end portion, and to illuminate the observation object with the light emitted by the light emitting device.
- the endoscope having the light emitting device provided at the distal end portion is configured such that an image of the observation object illuminated by the light emitting device is picked up by an image pickup device, an electrical cable extended from the image pickup device, and an electrical cable for supplying electric power to the light emitting device are inserted in the insertion portion.
- an endoscope apparatus a plurality of types of adapters are prepared and there is a case where the number of LEDs to be provided is different depending on the types of the adapters.
- the plurality of types of adapters are selectively and exchangeably attachable to an insertion portion.
- required amount of electric power is different depending on the number of LEDs to be provided to each of the adapters. Therefore, if appropriate amount of electric power can not be supplied to the LEDs depending on the adapter to be attached, appropriate amount of light required for illumination might not be obtained.
- Japanese Patent Application Laid-Open Publication No. 2006-333945 discloses an endoscope apparatus capable of easily obtaining appropriate amount of illumination light depending on a type of adapter to be attached, with a simple configuration.
- an adapter when an adapter is attached to an insertion portion, for example, a power supply portion and an illumination portion are electrically connected and the type of adapter is determined using a resistor provided to the adapter. Based on the determination result, the amount of the electric power supplied from the power supply portion is corrected and the corrected amount of electric power is supplied to LEDs.
- the adapters for endoscope apparatus include a direct view type and a side view type, and in addition, a plurality of types of adapters such as a monocular type, a stereo type and the like are prepared according to intended purposes, for the direct view type and the side view type, respectively.
- Some endoscope apparatus adapters are provided with various types of sensors including a temperature sensor. With a reduction in diameter of insertion portions of endoscopes, these adapters are reduced in size. With the reduction in size of the adapters, a space on an end surface of a connecting portion between the adapter and the insertion portion is reduced. This makes it difficult to arrange electric elements such as a resistor for determining the type of the adapter on the end surface on the adapter side.
- An endoscope adapter including a light emitting diode includes: a detachable portion to be attached to an adapter attaching portion provided on a distal end portion of an insertion portion, the insertion portion including inside thereof at least one image-forming optical system; an adapter main body including an adapter side observation optical system whose optical axis is coincident with an optical axis of the image-forming optical system; a contact pin which enables power supply to the light emitting diode to be turned on when the detachable portion is attached to the adapter attaching portion; and a resistor arranged in a space formed in the endoscope adapter to determine a type of the endoscope adapter.
- FIG. 1 is a figure explaining an adapter type endoscope apparatus
- FIG. 2 is a figure explaining an insertion portion distal end portion of the adapter type endoscope, and a side view type distal end adapter which can be detachably attached to the insertion portion distal end portion;
- FIG. 3 is a plan view when the side view type distal end adapter is viewed from the observation window side;
- FIG. 4 is a plan view when the side view type distal end adapter is viewed from the opening side of a detachable ring;
- FIG. 5 is a sectional view along the line V-V in FIG. 4 ;
- FIG. 6 is a sectional view along the line VI-VI in FIG. 5 .
- FIG. 7 is a perspective view explaining an adapter side electrical connection portion
- FIG. 8 is a front view when the adapter side electrical connection portion is viewed from the side of a second pin member
- FIG. 9 is a sectional view along the line IX-IX in FIG. 8 ;
- FIG. 10 is a figure explaining a configuration of a flexible substrate, and an opening shape of an adapter side connection portion arrangement hole;
- FIG. 11 is a figure explaining a state where a first pin member of the adapter side electrical connection portion fixed to the adapter side connection portion arrangement hole is electrically connected to an LED electrode by the flexible substrate;
- FIG. 12 is a plan view when the side view type distal end adapter in a state where a hood portion is removed, is viewed from the other surface side facing the one surface side;
- FIG. 13 is a plan view when the insertion portion distal end portion of the endoscope insertion portion is viewed from the front side;
- FIG. 14 is a sectional view along the line XIV-XIV in FIG. 13 ;
- FIG. 15 is a sectional view along the line XV-XV in FIG. 13 ;
- FIG. 16 is a sectional view along the line XVI-XVI in FIG. 13 ;
- FIG. 17 is a figure explaining a relationship between the endoscope side electrical connection portion and the endoscope side connection portion arrangement hole;
- FIG. 18 is a plan view when the adapter type endoscope in the state where the side view type distal end adapter is attached to the insertion portion distal end portion, is viewed from the one surface side of the distal end adapter;
- FIG. 19 is a sectional view along the line XIX-XIX in FIG. 18 ;
- FIG. 20 is a perspective view when the adapter type endoscope in the state where a direct view type distal end adapter is attached to the insertion portion distal end portion, is viewed from the front side of the distal end adapter;
- FIG. 21 is a perspective view when the direct view type distal end adapter in the state where the hood portion is removed, is viewed from the front side;
- FIG. 22 is a perspective view explaining a positional relationship and an electrical connection between a first pin member and an LED electrode, when the direct view type distal end adapter in the state where the hood portion is removed, is viewed from the side surface side;
- FIG. 23 is a sectional view along the line XXIII-XXIII in FIG. 20 ;
- FIG. 24 is a sectional view along the line XXIV-XXIV in FIG. 23 ;
- FIG. 25 is a longitudinal sectional view of a stereo direct view type distal end adapter
- FIG. 26 is a sectional view along the line XXVI-XXVI in FIG. 25 ;
- FIG. 27 is a sectional view along the line XXVII-XXVII in FIG. 25 ;
- FIG. 28 is a view showing another arrangement example of a resistor for determination
- FIG. 29 is a front view of a stereo direct view type distal end adapter including a channel hole
- FIG. 30 is a sectional view along the line XXX-XXX in FIG. 29 ;
- FIG. 31 is a sectional view along the line XXXI-XXXI in FIG. 29 ;
- FIG. 32 is a rear view of the stereo direct view type distal end adapter including a channel hole
- FIG. 33 is a perspective view explaining a distal end adapter having a resistor for determination arranged on a substrate on which a plurality of LEDs are arranged.
- an adapter type endoscope apparatus 1 is configured by including an endoscope main body portion 2 , a long endoscope insertion portion (hereinafter abbreviated as insertion portion) 3 provided, for example, with a bending portion 3 b, and a distal end adapter 10 as an endoscope adapter.
- An adapter type endoscope is configured by attaching the distal end adapter 10 to a distal end portion 3 a (as will be described below) of the insertion portion 3 .
- the endoscope main body portion 2 is formed in a substantially box shape, and a control portion 4 , and the like, is provided inside the endoscope main body portion 2 .
- a monitor 5 for displaying an endoscopic image, and the like, is provided, for example, on the front surface side of the top surface portion of the endoscope main body portion 2 .
- an operation panel 6 for performing the bending operation of the bending portion 3 b provided in the insertion portion 3 , and the like, are provided on the front surface of the endoscope main body portion 2 .
- the insertion portion 3 is configured by providing successively from the distal end side, the insertion portion distal end portion (hereinafter abbreviated as distal end portion) 3 a, the bending portion 3 b, and a flexible tube portion 3 c.
- the insertion portion 3 is configured such that the proximal end portion thereof is electrically and mechanically connected to the endoscope main body portion 2 via a connecting portion (not shown).
- the distal end portion 3 a has in the inside thereof an image-forming optical system as will be described below.
- the distal end adapter 10 is configured so as to be detachably attached to the distal end portion 3 a.
- the distal end adapter 10 is a side view type configured to observe a direction perpendicular to the longitudinal axis direction of the insertion portion 3 , that is, a so-called side view direction, and includes a side view optical system (as will be described below) as an adapter side observation optical system.
- the distal end adapter 10 is mainly configured by including a detachable ring 12 , a hood portion 13 , and an adapter main body 11 which will be described below and is shown in FIG. 5 .
- the hood portion 13 is a substantially cylindrical exterior member whose distal end portion is formed as a curved surface.
- An illumination hole 15 and an optical portion hole 17 are formed on the side of one side surface 13 a of the hood portion 13 .
- a plurality of light emitting devices, such as for example, LED chips (hereinafter abbreviated as LEDs) 14 faces the illumination hole 15 .
- An observation window 16 a which configures a side view optical system 16 , is arranged in the optical portion hole 17 .
- the distal end portion 3 a of the insertion portion 3 is mainly configured by an exterior portion 31 and a distal end portion main body 32 .
- the exterior portion 31 has an adapter attaching portion on a distal end side of an outer peripheral surface thereof.
- the adapter attaching portion includes a first male screw portion 33 a which is projectingly provided, and includes at a proximal end side thereof a second male screw portion 33 b which is projectingly provided.
- the first male screw portion 33 a is formed narrower than the second male screw portion 33 b.
- a sliding portion 33 c is formed between the first male screw portion 33 a and the second male screw portion 33 b.
- a rotation stopping portion 34 and contact surface portions 41 a of a pair of terminal members 41 , and the like, are projectingly provided on a distal end surface 32 a of the distal end portion main body 32 .
- the pair of terminal members 41 configure a conductive portion of an endoscope side electrical connection portion (hereinafter abbreviated as endoscope side connection portion) 40 .
- the rotation stopping portion 34 is configured as a projecting portion having a substantially D-shaped cross section. That is, the rotation stopping portion 34 is provided with plane portions which face each other and configure side surfaces, and with curved surface portions which connect the plane portions to each other.
- the rotation stopping portion 34 serves as a positioning mechanism for positioning the distal end adapter 10 attached to the distal end portion 3 a, and also serves as a protection mechanism for protecting the contact surface portion 41 a of the terminal member 41 .
- reference character 35 a denotes a distal end lens cover which is provided for protecting an image-forming optical system 35 .
- distal end adapter 10 will be described with reference to FIGS. 4 to 12 .
- the distal end adapter 10 is configured symmetrically with respect to the vertical axis Va as the center line in the figure.
- the distal end adapter 10 is configured by including the adapter main body 11 , the detachable ring 12 , the hood portion 13 , an LED holding plate 18 , a flexible substrate 19 , an adapter side electrical connection portion (hereinafter abbreviated as adapter side connection portion) 20 , and the like.
- the adapter main body 11 is an apparatus main body, which has a cylindrical shape formed of, for example, a metal member as a rigid member and is provided with a projecting portion 11 a at the distal end side of the cylindrical shape.
- the projecting portion 11 a is configured by forming one end of the adapter main body 11 in a shape of a pair of projections as will be described below and as shown in FIGS. 10 to 12 .
- a supporting portion 11 b As shown in FIG. 5 , in the adapter main body 11 , there are formed a supporting portion 11 b, an optical hole 11 c, a positioning hole 11 d, and an adapter side connection portion arrangement hole (hereinafter abbreviated first connection portion hole) 11 e, in addition to the projecting portion 11 a.
- a prism 16 b which configures the side view optical system 16 is provided on the supporting portion 11 b.
- a first optical lens 16 c, a second optical lens 16 d, a space ring, a diaphragm, and the like, are arranged in the optical hole 11 c.
- the opening shape of the positioning hole 11 d has the same approximate D shape as the external shape of the rotation stopping portion 34 , and the rotation stopping portion 34 is inserted into the positioning hole 11 d.
- An abutting pin arrangement recessed portion 11 f is provided on the side of the first connection portion hole 11 e of the positioning hole 11 d.
- the adapter side connection portion 20 is fixed in the first connection portion hole 11 e of the positioning hole 11 d.
- the opening shape of the first connection portion hole 11 e is a shape of the horizontally oriented figure of 8 as will be described below and as shown in FIG. 10 .
- Reference numeral 29 denotes an O ring and is arranged in a circumferential groove 11 g formed on the proximal end side of the adapter main body 11 .
- the detachable ring 12 which is a detachable portion and has a substantially tubular shape, is formed concentrically to the adapter main body 11 , so as to be rotatably connected to the adapter main body 11 .
- a female screw portion 12 a into which the male screw portions 33 a and 33 b are screwed.
- the hood portion 13 is an exterior member, at the distal end portion of which the curved surface portion is formed as described above.
- the opening on the side of the proximal end portion of the hood portion 13 is fixed integrally to the adapter main body 11 , for example, by adhesion.
- LEDs 14 mounted on the LED holding plate 18 are arranged in the illumination hole 15 having an opening on the side of the one side surface 13 a of the hood portion 13 .
- the observation window 16 a, a space ring, a diaphragm, and the like, which configure the side view optical system 16 are fixed in the optical portion hole 17 having an opening on the side of the one side surface 13 a of the hood portion 13 .
- the LED holding plate 18 is arranged integrally with the distal end surface side portion of the adapter main body 11 .
- a substrate 9 is arranged on a substrate arrangement surface 18 a of the LED holding plate 18 .
- a pattern 9 a for example, as shown in FIG. 3 is formed beforehand on the substrate 9 .
- On the substrate 9 there are mounted the LEDs 14 and a pair of LED electrodes 28 as element electrodes.
- Wiring members 8 are respectively electrically connected between a head portion 28 a of the LED electrode 28 provided on the substrate 9 and a contact portion 14 a of the LED 14 , and between the pattern 9 a and a contact portion 14 a of the LED 14 .
- Reference numeral 28 b denotes a pin portion of the LED electrode 28 , and one end side of the flexible substrate 19 is electrically connected to the pin portion 28 b.
- the adapter side connection portion 20 will be described with reference to the drawings.
- the adapter side connection portion 20 is a contact pin unit which is configured by a pair of case bodies 23 , first pin members 21 configuring a contact pin, second pin members 22 configuring an abutting pin, coil springs 24 serving as an urging member, and an adapter side insulating portion 25 configuring an outer sheath.
- the first pin member 21 , the second pin member 22 , the case body 23 , and the coil spring 24 are conductive members which are formed of aluminum, brass, iron, or the like, and the surface of which is plated with a high conductivity material such as gold.
- the reference character 26 denotes an electrical connection member which is configured by arranging the first pin member 21 , the second pin member 22 and the coil spring 24 in the case body 23 .
- the adapter side insulating portion 25 is formed of a high heat resistance resin member, and integrally covers a pair of electrical connection members 26 so as to insulate the pair of electrical connection members 26 as conductive portions from each other.
- a pin portion 22 b of the second pin member 22 At the distal end portion of a pin portion 22 b of the second pin member 22 , there are provided four contact portions 22 c having a tapered shape which becomes thinner toward the distal end side.
- the four contact portions 22 c are formed by providing two V-shaped grooves in a cross shape in the pin distal end portion from the side of the distal end surface.
- the electrical connection member 26 configured by the first pin member 21 , the second pin member 22 , the case body 23 , and the coil spring 24 is described.
- the first pin member 21 is arranged on the distal end side of the case body 23 .
- the first pin member 21 is provided with a flange portion 21 a, and the flange portion 21 a is fixed integrally with the case body 23 by, for example, a conductive adhesive.
- a pin portion 21 b of the first pin member 21 is in the state of projecting from the distal end side of the case body 23 by a predetermined amount.
- the coil spring 24 is slidably arranged in the case body 23 to which the first pin member 21 is fixed. One end side of the coil spring 24 is arranged in contact with the proximal end surface of the flange portion 21 a which configures the first pin member 21 .
- the second pin member 22 is slidably arranged in the case body 23 in which the coil spring 24 is arranged.
- the distal end surface of a flange portion 22 a of the second pin member 22 is arranged in contact with the proximal end side of the coil spring 24 .
- a caulked portion 23 a configured by bending the entire periphery of the proximal end portion of the case body 23 in the center axis direction is provided at a predetermined position.
- the second pin member 22 of the electrical connection member 26 is urged by the urging force of the coil spring 24 in the axis direction, and the pin portion 22 b of the second pin member 22 projects from the proximal end side of the case body 23 by a predetermined amount.
- the caulked portion 23 a in the electrical connection member 26 is to prevent the second pin member 22 from falling off.
- the second pin member 22 which is in the projecting state by being urged by the coil spring 24 is slidable in the axis direction.
- the adapter side connection portion 20 is configured in a state where the pair of electrical connection members 26 are arranged in parallel with each other at a predetermined interval.
- the electrical connection members 26 arranged in the adapter side connection portion 20 are covered by the adapter side insulating portion 25 , so as to be insulated from each other by the adapter side insulating portion 25 .
- the adapter side connection portion 20 is specifically configured by insert molding. For this reason, the end portion of the first pin member 21 covered by the adapter side insulating portion 25 is set in the state of projecting from the one end surface of the adapter side insulating portion 25 by a predetermined amount. Further, the end portion of the second pin member 22 covered by the adapter side insulating portion 25 is set in the state of projecting from the other end surface of the adapter side insulating portion 25 by a predetermined amount.
- the adapter side insulating portion 25 is configured by including an eaves portion 25 e on the side of the second pin member 22 .
- the eaves portion 25 e is provided so as to cover the one surface side (the upper side in the figure) of the pair of case bodies 23 .
- the eaves portion 25 e prevents a trouble caused by the case body 23 electrically contacting the rotation stopping portion 34 .
- the adapter side insulating portion 25 is provided over the entire periphery of the case body 23 which configures the electrical connection member 26 of the adapter side connection portion 20 .
- the thickness of the adapter side insulating portion 25 covering the case body 23 is set to a dimension T except for the portion in which the electrical connection members are adjacent to each other.
- the thickness of an inter-pin adapter side insulating portion 25 f which is an inter-pin insulating portion on a line perpendicular to the center axes of the pair of electrical connection members 26 configuring the adapter side connection portion 20 is set to a dimension smaller than twice the thickness T (described as 2T— ⁇ a in the figure) of a circumferential insulating portion 25 g which configures the adapter side insulating portion 25 covering the periphery of the case body 23 .
- the thickness dimension of the inter-pin adapter side insulating portion 25 f is reduced to be smaller than twice the thickness T of the circumferential insulating portion 25 g, and the interval between the pair of adjacent electrical connection members 26 is reduced as much as possible within a range in which the insulating state can be maintained.
- the adapter side connection portion 20 having an integral configuration is configured in such a way that the pair of electrical connection members 26 , each of which is configured by arranging the first pin member 21 , the second pin member 22 , and the coil spring 24 in the case body 23 , are provided in the adapter side insulating portion 25 , so as to be in parallel with each other at a predetermined interval. Then, in this configuration, the thickness of the inter-pin adapter side insulating portion 25 f on the line perpendicular to the center axes of the pair of electrical connection members 26 of the adapter side connection portion 20 is set to a dimension smaller than the thickness 2T of the circumferential insulating portion 25 g.
- the thickness of the insulating portion connecting between the center axes of the pair of electrical connection members 26 provided in the adapter side connection portion 20 is made smaller by a than the thickness in the case where the two electrical connection members 26 , which are respectively provided with the adapter side insulating portion 25 having the thickness T around the periphery of the case body 23 , are arranged side by side.
- the thickness dimension of the adapter side insulating portion 25 in the case where the pair of electrical connection members 26 provided with the adapter side insulating portion 25 having the thickness T are arranged side by side becomes 4T as a whole, while the thickness of the insulating portion on the line connecting between the center axes of the pair of electrical connection members 26 provided in the adapter side connection portion 20 can be made smaller than 4T by ⁇ .
- the thickness of the inter-pin adapter side insulating portion 25 f is set smaller than 2T, so as to thereby reduce the longitudinal width dimension of the adapter side connection portion 20 . As a result, it is possible to further reduce the diameter of the distal end adapter 10 .
- the adapter side connection portion 20 in which the pair of electrical connection members 26 are integrally configured is arranged on the lower side from the horizontal axis Ha of the distal end adapter 10 as shown in FIG. 4 .
- the optical axis horizontal axis OHa of the optical hole 11 c cannot be arranged eccentrically upward by ⁇ in the figure with respect to the horizontal axis Ha.
- the optical axis horizontal axis OHa of the optical hole 11 c can be arranged eccentrically upward by ⁇ in the figure with respect to the horizontal axis Ha, and thereby the diameter of the distal end portion 3 a can be reduced.
- a first recessed portion 25 a and a second recessed portion 25 b having an abutting surface 25 d are provided on the side surface portion of the adapter side insulating portion 25 which configures the adapter side connection portion 20 .
- the first recessed portion 25 a has a predetermined recessed shape which is opened on the proximal end surface side, and has an abutting surface 25 c in an intermediate portion between the proximal end surface side and the distal end side.
- the second recessed portion 25 b has a predetermined recessed shape which is opened on the proximal end surface side, and has the abutting surface 25 d in the intermediate portion.
- the first recessed portion 25 a and the second recessed portion 25 b are formed in an opposing positional relationship substantially at the center of both the planar shaped side surfaces positioned one above the other in the figure, that is, between the electrical connection members.
- the abutting surfaces 25 c and 25 d are positioning surfaces for setting the arrangement position of the adapter side connection portion 20 .
- the abutting surfaces 25 c and 25 d are respectively brought into contact, as will be described below and as shown in FIG. 10 , with an abutting end surface 11 m which is a positioning portion of projecting portion 11 h, and with an abutting end surface 11 n which is a positioning portion of a projecting portion 11 k.
- the forming positions of the abutting surfaces 25 c and 25 d are set so that the distance from the distal end surface of one of the first pin members 21 to the abutting surface 25 c is equal to the distance from the distal end surface of the other of the first pin members 21 to the abutting surface 25 d.
- the abutting surfaces 25 c and 25 d are end surfaces of the recessed portions 25 a and 25 b which are formed in the intermediate portion of the side surface portion of the adapter side insulating portion 25 at the same distance from the proximal end side end surface of the adapter side insulating portion 25 .
- the external shape of the adapter side insulating portion 25 on the side of the second pin members 22 is an approximate figure-of-8 shape.
- the external shape of the adapter side insulating portion 25 on the side of the first pin members 21 is an approximate elliptic shape, in other words, a figure-of-0 shape.
- the shape of the first recessed portion 25 a and the shape of the second recessed portion 25 b are made different from each other so as to prevent the reverse assembling, and are configured such that the projecting portion 11 h is inserted and arranged in the first recessed portion 25 a, and the projecting portion 11 k is inserted and arranged in the second recessed portion 25 b.
- the adapter side connection portion 20 is fixed in the first connection portion hole 11 e shown in FIG. 10 .
- the opening shape of the first connection portion hole 11 e is an approximate figure-of-8 shape, which shape is arranged in parallel with the horizontal axis Ha.
- the first connection portion hole 11 e is formed by including the first projecting portion 11 h and the second projecting portion 11 k which project in the central direction of the hole and are in parallel with the longitudinal axis.
- the first projecting portion 11 h of the first connection portion hole 11 e is inserted into the first recessed portion 25 a on the side of the second pin member 22 of the adapter side connection portion 20 . Further, the second projecting portion 11 k of the first connection portion hole 11 e is inserted into the second recessed portion 25 b of the adapter side connection portion 20 .
- the adapter side connection portion 20 is pushed into the first connection portion hole 11 e. Then, after the second pin member 22 is made to project from the proximal end side opening, the abutting end surface 11 m of the first projecting portion 11 h is brought into contact with the abutting surface 25 c, and the abutting end surface 11 n of the second projecting portion 11 k is brought into contact with the abutting surface 25 d. Thereby, the adapter side connection portion 20 is arranged in the first connection portion hole 11 e in a predetermined state. In this arrangement state, the second pin member 22 of the adapter side connection portion 20 is arranged at a predetermined position in the abutting pin arrangement recessed portion 11 f in a predetermined state.
- the flexible substrate 19 electrically connects the pair of first pin members 21 to the pin portions 28 b of the pair of LED electrodes 28 .
- a pair of first contact portions 19 a for electrical connection with the pair of first pin members 21 and a pair of second contact portions 19 b for electrical connection with the pair of pin portions 28 b, are provided on the respective end portion sides of the flexible substrate 19 .
- the interval between the first contact portions 19 a is configured so as to correspond to the adapter side connection portion 20 which is a member for effecting the reduction in the diameter.
- the interval between the second contact portions 19 b is set larger so as to correspond to the arrangement position of the pattern 9 a and the LED electrodes 28 which are arranged in consideration of the workability at the time of connecting the wiring member 8 , and the like. That is, the interval between the second contact portions 19 b is formed larger than the interval between the first contact portions 19 a.
- the distal end adapter 10 is provided with a resistor 7 for determining the type of the distal end adapter.
- the resistor 7 is arranged in a D-shape space 10 S 1 configured of the hood portion 13 and the LED holding portion 18 so as to face an inner surface of the hood portion 13 of the flexible substrate 19 .
- the mounting position of the resistor 7 on the flexible substrate 19 is not limited in the D-shape space 10 S 1 , and may be in a distal end side space 10 S 2 configured of the hood portion 13 and the LED holding plate 18 as shown by the dashed lines, for example.
- the resistor 7 is mounted on a resistor contact 19 c formed on the flexible substrate 19 shown in FIG. 10 .
- the resistor 7 of different resistance value is mounted for each type of the distal end adapter.
- the resistor for determining the type of the distal end adapter is thus mounted on the flexible substrate electrically connecting the pair of first pin members and the pin portions of the pair of LED electrodes.
- the resistor mounted on the flexible substrate is arranged in the D-shape space or in the distal end side space. This prevents accidental contact of the resistor with other electronic components and bad electrical contact of the resistor.
- the resistor is mounted on the flexible substrate so as to face the inner surface of the hood portion, which enables an assembly worker (hereinafter abbreviated as worker) to visually recognize a resistance value of the resistor at the time of assembly work for integrally fixing the adapter main body to the hood portion. As a result, wrong assembly can be prevented.
- the resistor 7 may be electrically connected to the first pin member 21 . Furthermore, in addition to the resistor 7 , an electric element such as a temperature sensor may be arranged on the flexible substrate 19 .
- the worker applies an adhesive to the plane surface side and the curved surface side of the adapter side insulating portion 25 , which are the side surface portion of the adapter side connection portion 20 . Then, as described above, the worker inserts the side of the second pin member 22 of the adapter side connection portion 20 from the distal end side opening of the first connection portion hole 11 e shown in FIG. 10 . At this time, the worker makes the first projecting portion 11 h inserted in the first recessed portion 25 a, and makes the second projecting portion 11 k inserted in the second recessed portion 25 b.
- the worker pushes the adapter side connection portion 20 into the first connection portion hole 11 e, so as to bring the abutting surface 25 c into contact with the abutting end surface 11 m of the first projecting portion 11 h, and to bring the abutting surface 25 d into contact with the abutting end surface 11 n of the second projecting portion 11 k. Then, the worker holds the contact state of the abutting surfaces 25 c and 25 d of the adapter side connection portion 20 with the abutting end surfaces 11 m and 11 n until the adhesive is cured.
- the adapter side connection portion 20 is integrally fixed to the adapter main body 11 .
- the pin portions 21 b of the pair of first pin members 21 are aligned so as to project from the end surface of the distal end side opening to the distal end side by a predetermined amount
- the pin portions 22 b of the pair of second pin members 22 are aligned so as to project in the abutting pin arrangement recessed portion 11 f from the bottom surface of the abutting pin arrangement recessed portion 11 f by a predetermined amount.
- the flexible substrate 19 is bent and housed in the space formed by the projecting portion 11 a and the LED holding plate 18 .
- the first contact portions 19 a provided on the flexible substrate 19 are arranged in a predetermined state with respect to the pin portions 21 b of the respective first pin members 21 .
- one of the pin portions 21 b and one of the first contact portions 19 a are electrically connected to each other with, for example, solder 30 , as shown in FIG. 5 .
- the other of the first pin portions 21 b and the other of the first contact portions 19 a are electrically connected to each other with solder 30 .
- the first connection portion hole 11 e whose opening shape is an approximate figure-of-8 shape, is formed in the distal end adapter 10 .
- the first recessed portion 25 a having the abutting surface 25 c and the second recessed portion 25 b having the abutting surface 25 d are provided on the side surface portion of the plane surface side of the adapter side insulating portion 25 which configures the adapter side connection portion 20 .
- the external shape of the adapter side insulating portion 25 on the side of the second pin member 22 becomes an approximate figure-of-8 shape which coincides with the opening shape of the first connection portion hole 11 e.
- the respective distances from the abutting surfaces 25 c and 25 d of the recessed portions 25 a and 25 b to the distal end of the contact portion 22 c of the second pin member 22 are set to be equal to each other, so that the abutting surface 25 c and 25 d are used as the positioning surfaces.
- the adapter side insulating portion 25 having the figure-of-8 shaped portion is inserted and arranged in the first connection portion hole 11 e having the figure-of-8 shaped opening, the abutting surface 25 c of the first recessed portion 25 a is brought into contact with the abutting end surface 11 m of the first projecting portion 11 h provided in the first connection portion hole 11 e, and also the abutting surface 25 d of the second recessed portion 25 b is brought into contact with the abutting end surface 11 n of the second projecting portion 11 k provided in the first connection portion hole 11 e.
- the adapter side connection portion 20 is positioned and arranged in the predetermined position with respect to the first connection portion hole 11 e of the distal end adapter 10 . Further, in this abutting arrangement state, the adapter side connection portion 20 is integrally fixed to the distal end adapter 10 , so that the pair of first pin members 21 and the pair of second pin members 22 can be arranged in the predetermined position and in the predetermined projecting state.
- the first recessed portion 25 a and the second recessed portion 25 b which respectively have the end surfaces, are formed in the side surface portion of the adapter side insulating portion 25 of the adapter side connection portion 20 , and the end surfaces of the recessed portions 25 a and 25 b are respectively used as the abutting surfaces 25 c and 25 d.
- the first projecting portion 11 h which is inserted and arranged in the first recessed portion 25 a, and the second projecting portion 11 k which is inserted and arranged in the second recessed portion 25 b, are provided in the first connection portion hole 11 e.
- the distal end surfaces of the projecting portions 11 k and 11 h are respectively used as the abutting end surface 11 m which is brought into contact with the abutting surface 25 c of the first recessed portion 25 a, and as the abutting end surface 11 n which is brought into contact with the abutting surface 25 d of the second recessed portion 25 b.
- the adapter side connection portion 20 when the adapter side connection portion 20 is arranged in the first connection portion hole 11 e, the abutting end surface 11 m of the first projecting portion 11 h is brought into contact with the abutting surface 25 c of the first recessed portion 25 a, and the abutting end surface 11 n of the second projecting portion 11 k is brought into contact with the abutting surface 25 d of the second recessed portion 25 b.
- the adapter side connection portion 20 can be arranged in the state of being positioned.
- the adapter side connection portion 20 is positioned and arranged by bringing the abutting end surfaces 11 m and 11 n into contact with the abutting surfaces 25 c and 25 d which are configured so as to be recessed from the outer peripheral surface of the adapter side insulating portion 25 , without providing a flange portion, or the like, which projects from the outer peripheral surface of the adapter side insulating portion 25 configuring the maximum external shape of the adapter side connection portion 20 .
- the adhesive is applied beforehand to the side surface portions of the plane surface side and the curved surface side of the adapter side insulating portion 25 which configures the adapter side connection portion 20 .
- it may also be configured such that after the adapter side connection portion 20 is arranged in the first connection portion hole 11 e in the predetermined state, an adhesive having excellent fluidity is poured in the gap between the adapter side connection portion 20 and the first connection portion hole 11 e, and thereby the adapter side connection portion 20 and the first connection portion hole 11 e are stuck and fixed to each other.
- the adapter side connection portion 20 in the state where the first pin portion 21 b is electrically connected to the first contact portion 19 a of the flexible substrate 19 , is arranged in the first connection portion hole 11 e in a predetermined state, and thereafter fixed in this state.
- the present embodiment is configured such that the pair of first pin members 21 , the pair of second pin members 22 , and the like, are provided in the adapter side connection portion 20 .
- the adapter side connection portion is formed by providing the adapter side insulating portion 25 in the state where a required number of electrical connection members 26 are arranged in parallel with each other at predetermined intervals.
- the distal end portion 3 a is configured symmetrically with respect to the vertical axis Vc as the center line in the figure.
- the distal end portion 3 a is configured mainly by the exterior portion 31 and the distal end portion main body 32 which is the apparatus main body.
- the rotation stopping portion 34 , and the contact surface portion 41 a of the terminal member 41 which configures the endoscope side connection portion 40 are provided so as to project on the distal end side of the distal end portion main body 32 .
- the rotation stopping portion 34 is configured so as to be inserted and arranged in the positioning hole 11 d.
- the distal end adapter 10 and the distal end portion 3 a are set in a predetermined positional relationship by arranging the substantially D-shaped rotation stopping portion 34 in the substantially D-shaped positioning hole 11 d.
- the distal end lens cover 35 a As shown in FIG. 14 , in the distal end portion main body 32 which configures the distal end portion 3 a, there are provided the distal end lens cover 35 a, a stepped lens hole 32 b, and an image-pickup hole 32 c, which configure the image-forming optical system 35 .
- the stepped lens hole 32 b is a hole for arranging a plurality of optical lenses 35 b and 35 c
- the image-pickup hole 32 c is a hole for arranging an image pickup apparatus 36 provided with an image pickup device 36 a, such as a CCD. That is, a stepped through hole configured by the image-pickup hole 32 c and the stepped lens hole 32 b, which have different diameters, is formed in the distal end portion main body 32 .
- An image-pickup frame 36 b configuring the image pickup apparatus 36 is arranged in the image-pickup hole 32 c.
- the image-pickup frame 36 b is a stepped tubular member having a substantially uniform thickness.
- the distal end part of the image-pickup frame 36 b is arranged in the image-pickup hole 32 c.
- a lens cover 35 d is arranged on the distal end side of the image-pickup frame 36 b, and a cover glass 35 e is arranged on the proximal end side of the image-pickup frame 36 b.
- the cover glass 35 e is stuck and fixed to a package glass (not shown) provided on the image pickup surface side of the image pickup device 36 a.
- An image pickup circuit substrate (not shown) is electrically and mechanically connected to the proximal end side of the image pickup device 36 a.
- Electronic components such as a capacitor and a transistor, are mounted on the image pickup circuit substrate.
- a signal line which is inserted in the signal cable (not shown) is electrically connected to the image pickup circuit substrate in a predetermined state.
- the image pickup device 36 a, the image pickup circuit substrate, and the like, are sealed by, for example, a thermoplastic resin 36 c.
- an endoscope side connection portion arrangement hole (hereinafter described as second connection portion hole) 32 d is formed in the lower part of the distal end portion main body 32 configuring the distal end portion 3 a in the figure.
- the endoscope side connection portion 40 is fixed in the second connection portion hole 32 d.
- the opening shape of the second connection portion hole 32 d is a figure-of-8 shape which is substantially the same as the opening shape of the first connection portion hole 11 e.
- the second connection portion hole 32 d has the same configuration as that in the first connection portion hole 11 e. That is, a first projecting portion 32 e provided with a distal end side end surface 32 g, and a second projecting portion 32 f provided with a distal end side end surface 32 h, are formed in parallel to the longitudinal axis direction.
- the endoscope side connection portion 40 shown in FIGS. 13 to 17 is configured by the pair of terminal members 41 , and an endoscope side insulating portion 42 which configures an exterior sheath.
- the terminal member 41 is configured by including the disk-shaped contact surface portion 41 a and a thin and long rod portion 41 b.
- the contact portion 22 c of the second pin member 22 which configures the adapter side connection portion 20 is brought into contact with the disk shaped surface of the contact surface portion 41 a. Therefore, the outer diameter of the contact surface portion 41 a is configured to be larger than the outer diameter of the rod portion 41 b, within a possible range in consideration of the contact state with the contact portion 22 c.
- the terminal member 41 is a conductive member, which is formed of aluminum, brass, iron, or the like, and the surface of the terminal member 41 is plated with a highly conductive material, such as for example, gold.
- the endoscope side insulating portion 42 covers the entire periphery of the pair of terminal members 41 in an insulated state by leaving the proximal end side portion of the rod portion 41 b of the pair of terminal members 41 .
- the pair of terminal members 41 covered by the endoscope side insulating portion 42 are arranged in parallel with each other at a predetermined interval.
- the endoscope side insulating portion 42 is configured by a contact surface portion arrangement portion 42 a and a covering portion 42 b.
- the contact surface portion arrangement portion 42 a is formed like a pedestal, and covers from the proximal end surface of the contact surface portion 41 a to a part of the rod portion 41 b.
- the remaining portion of the endoscope side insulating portion 42 that is, the portion covering the intermediate portion of the rod portion 41 b is the covering portion 42 b.
- the proximal end side surface of the contact surface portion 41 a is in the state of being placed on the distal end surface of the contact surface portion arrangement portion 42 a.
- a stepped surface formed in the boundary portion between the contact surface portion arrangement portion 42 a and the covering portion 42 b is a butting surface 42 c serving as a positioning surface.
- a part of the distal end surface 32 a of the distal end portion main body 32 including the distal end side end surfaces 32 g and 32 h is brought into contact with the butting surface 42 c. That is, the external shape of the contact surface portion arrangement portion 42 a is formed larger than the external shape of the covering portion 42 b.
- the external shape of the contact surface portion arrangement portion 42 a is an elliptic shape, in other words, in an approximate figure-of-0 shape.
- the contact surface portions 41 a of the two terminal members 41 are arranged so as to be separated from each other at a predetermined distance.
- the contact surface portion arrangement portion 42 a prevents the outer peripheral surface of the contact surface portion 41 a from being brought into electrical contact with the rotation stopping portion 34 .
- the external shape end surface of the contact surface portion arrangement portion 42 a is formed wider, in other words, larger than the outer peripheral surface of the contact surface portion 41 a, so as to prevent the outer peripheral surface of the contact surface portion 41 a from projecting to the outside from the external shape end surface of the contact surface portion arrangement portion 42 a. That is, the contact surface portion 41 a is arranged on the contact surface portion arrangement portion 42 a in such a manner that any part of the contact surface portion 41 a is prevented from being extended to the outside from the elliptic outline of the contact surface portion arrangement portion 42 a.
- the covering portion 42 b includes a first recessed portion 42 d and a second recessed portion 42 e. For this reason, when the covering portion 42 b is viewed from the front surface side in the state where the proximal end surface of the rod portion 41 b projecting from the covering portion 42 b is set to face the front surface, the external shape of the covering portion 42 b is an approximate figure-of-8 shape, which is smaller than the above described elliptic shape.
- the endoscope side connection portion 40 is configured in such a way that in the state where the pair of terminal members 41 are arranged in parallel with each other at the predetermined interval, the endoscope side insulating portion 42 is provided so as to make the terminal members 41 covered and insulated from each other.
- the endoscope side connection portion 40 is formed by insert molding.
- the contact surface portion 41 a of the terminal member 41 covered by the endoscope side insulating portion 42 is integrally arranged in a close contact state with the contact surface portion arrangement portion 42 a.
- the width dimension W of the covering portion 42 b provided in the endoscope side insulating portion 42 which configures the endoscope side connection portion 40 is set smaller than the outer diameter dimension of the contact surface portion 41 a of the terminal member 41 . Further, the first projecting portion 32 e is inserted in the first recessed portion 42 d, and the second projecting portion 32 f is inserted in the second recessed portion 42 e.
- the adapter side connection portion 20 is configured in such a way that the endoscope side insulating portion 42 is provided around the pair of terminal members 41 which are arranged in parallel with each other at a predetermined interval.
- the terminal member 41 is configured by including the disk shaped contact surface portion 41 a and the rod portion 41 b having a diameter smaller than that of the contact surface portion 41 a.
- the contact surface portion 41 a is formed to have a large diameter in consideration of the contact property with the contact portion 22 c provided in the second pin member 22 . Also, the contact surface portion 41 a is arranged on the pedestal-like wide contact surface portion arrangement portion 42 a without protruding from the contact surface portion arrangement portion 42 a. Therefore, the contact surface portion 41 a is prevented from being brought into contact with the distal end portion main body 32 and the rotation stopping portion 34 .
- the rod portion 41 b is formed to have a small diameter within a range in which the property as the conductive member is maintained. Also, the rod portion 41 b is covered by the covering portion 42 b and the contact surface portion arrangement portion 42 a while leaving a part of the proximal end portion. This prevents the rod portions 41 b from being brought into contact with each other, and prevents the rod portion 41 b from being brought into contact with the distal end portion main body 32 .
- the width dimension of the covering portion 42 b which covers the rod portion 41 b formed to have the small diameter is made smaller than the outer diameter dimension of the contact surface portion 41 a of the terminal member 41 . Thereby, the reduction in the diameter of the distal end portion 3 a is realized.
- the endoscope side connection portion 40 which is integrally configured by providing the pair of terminal members 41 each having the contact surface portion 41 a and the rod portion 41 b, and the endoscope side insulating portion 42 , it is possible to obtain the contact surface portion 41 a which has a large diameter and effects sure contact with the contact portion 22 c of the second pin member 22 . It is also possible to reduce the width dimension of the covering portion 42 b and it is thereby possible to reduce the diameter of the distal end portion 3 a.
- the endoscope side connection portion 40 is fixed to the second connection portion hole 32 d as shown in FIG. 17 .
- the side of the rod portion 41 b which is exposed from the endoscope side insulating portion 42 configuring the endoscope side connection portion 40 is inserted from the distal end side opening of the second connection portion hole 32 d.
- the first projecting portion 32 e of the second connection portion hole 32 d is inserted into the first recessed portion 42 d of the covering portion 42 b which configures the endoscope side connection portion 40
- the second projecting portion 32 f of the second connection portion hole 32 d is inserted into the second recessed portion 42 e of the endoscope side connection portion 40 .
- the endoscope side connection portion 40 is pushed into the second connection portion hole 32 d. Then, after the rod portion 41 b is projected from the proximal end side opening, the butting surface 42 c is brought into contact with the distal end surface 32 a of the distal end portion main body 32 , which surface includes the distal end side end surfaces 32 g and 32 h.
- the endoscope side connection portion 40 is arranged in the second connection portion hole 32 d in a predetermined state.
- the rod portion 41 b of the terminal member 41 which configures the endoscope side connection portion 40 is arranged in a predetermined position in a terminal member arrangement recessed portion 32 k in a predetermined state.
- the worker When attaching the endoscope side connection portion 40 to the distal end portion 3 a, the worker applies an adhesive to the side surface portion of the endoscope side insulating portion 42 , which is the side surface of the endoscope side connection portion 40 . Then, as described above, the worker inserts the side of the rod portion 41 b which is exposed from the endoscope side insulating portion 42 of the endoscope side connection portion 40 , from the distal end side opening of the second connection portion hole 32 d shown in FIG. 17 . At this time, the worker inserts the first projecting portion 32 e into the first recessed portion 42 d, and inserts the second projecting portion 32 f into the second recessed portion 42 e.
- the worker pushes the endoscope side connection portion 40 into the second connection portion hole 32 d. Then, the butting surface 42 c is brought into contact with the distal end surface 32 a of the distal end portion main body 32 , which surface includes the distal end side end surfaces 32 g and 32 h. At this time, the worker holds the abutting state between the endoscope side connection portion 40 and the distal end surface 32 a of the distal end portion main body 32 , and makes the adhesive cured, so as to thereby fix the endoscope side connection portion 40 to the distal end portion 3 a.
- the pair of terminal members 41 are fixed in the insulated state to the distal end portion main body 32 .
- the contact surface portion 41 a of the pair of terminal members 41 is aligned so as to project by a predetermined amount from the distal end surface of the distal end portion main body 32 to the distal end side.
- the proximal end portion of the rod portion 41 b of the pair of terminal members 41 is arranged so as to project in the terminal member arrangement recessed portion 32 k by a predetermined amount from the bottom surface of the terminal member arrangement recessed portion 32 k.
- the contact surface portion 41 a of the terminal member 41 is arranged on the recessed position side inside a virtual plane P which is in contact with the distal end of the rotation stopping portion 34 , and with the distal end of the exterior portion 31 .
- the contact surface portion 41 a is not projected outside the virtual plane P. For this reason, even when the distal end portion 3 a collides with a door, or the like, the contact surface of the door, or the like, collides with the distal end portion 3 a as shown by the virtual plane P, and thereby the contact surface portion 41 a can be prevented from being damaged.
- the contact surface portion 41 a of the terminal member 41 is arranged in a slightly recessed positional relation to the distal end side surface of the exterior portion 31 . This makes it possible to prevent the contact surface portion 41 a from being touched carelessly by the worker's finger. Also, even when a foreign matter adheres to the surface of the contact surface portion 41 a, or when the surface of the contact surface portion 41 a is stained, it is possible to easily clean the surface of the contact surface portion 41 a, and to remove the foreign matter.
- the pair of rod portions 41 b arranged in the terminal member arrangement recessed portion 32 k are electrically connected with solder to contact portions 43 a which are respectively provided at the other end portions of a flexible substrate 43 .
- An electrical cable extended from the power supply portion not shown is electrically connected to one end portion of the flexible substrate 43 .
- the second connection portion hole 32 d having the opening shape of the approximate figure-of-8 shape is formed on the distal end surface of the distal end portion main body 32 which configures the distal end portion 3 a.
- the recessed portions 42 d and 42 e are provided in the covering portion 42 b which configures the endoscope side insulating portion 42 configuring the endoscope side connection portion 40 .
- the external shape of the covering portion 42 b configuring the endoscope side insulating portion 42 becomes the approximate figure-of-8 shape which is coincident with the opening shape of the second connection portion hole 32 d.
- the stepped portion formed by the contact surface portion arrangement portion 42 a and the covering portion 42 b is used as the butting surface 42 c serving as the positioning surface.
- the butting surface 42 c is brought into contact with the distal end surface of the distal end portion main body 32 , which surface includes the distal end side end surface 32 g of the first projecting portion 32 e and the distal end side end surface 32 f of the second projecting portion 32 h, which portions are provided in the second connection portion hole 32 d.
- the endoscope side connection portion 40 is positioned and arranged in the predetermined position with respect to the second connection portion hole 32 d of the distal end portion 3 a.
- the endoscope side connection portion 40 is integrally fixed to the distal end portion 3 a, so that the insulation of the pair of terminal members can be secured, and the contact surface portion 41 a of the pair of terminal members 41 and the pair of rod portions 41 b can be arranged in the predetermined positions in the predetermined projecting state.
- the adhesive is applied beforehand to the side surface portion of the endoscope side insulating portion 42 which configures the endoscope side connection portion 40 .
- it may also be configured such that after the endoscope side connection portion 40 is arranged in the second connection portion hole 32 d in the predetermined state, an adhesive having excellent fluidity is poured into the gap between the endoscope side connection portion 40 and the second connection portion hole 32 d, so as to make the endoscope side connection portion 40 stuck and fixed to the second connection portion hole 32 d.
- the user When assembling the distal end adapter 10 to the distal end portion 3 a, the user first performs positioning of the female screw portion 12 a formed in the end portion of the detachable ring 12 and the first male screw portion 33 a formed in the exterior portion 31 so that the screw portions are screwed with each other. Then, the user rotates the detachable ring 12 in a predetermined direction, so as to make the female screw portion 12 a screwed to the first male screw portion 33 a. Thereafter, in this screwed state, the user further rotates the detachable ring 12 in the predetermined direction. Then, the female screw portion 12 a is moved beyond the first male screw portion 33 a, so that the female screw portion 12 a is arranged on the sliding portion 33 c so as to be moved back and forth in the axis direction.
- the user aligns the positioning hole 11 d provided in the adapter main body 11 with the rotation stopping portion 34 provided in the distal end portion main body 32 . Then, the user performs a hand operation so as to reduce the relative distance between the detachable ring 12 and the second male screw portion 33 b. Then, the rotation stopping portion 34 is inserted in the positioning hole 11 d. In this insertion arrangement state, the user performs a hand operation to further reduce the relative distance between the detachable ring 12 and the second male screw portion 33 b. Then, the female screw portion 12 a formed in the end portion of the detachable ring 12 is brought into contact with the second male screw portion 33 b formed in the exterior portion 31 .
- the user rotates the detachable ring 12 in the predetermined direction in order to make the male screw portion 33 b screwed into the female screw portion 12 a. Then, the male screw portion 33 b is screwed into the female screw portion 12 a according to the rotation of the detachable ring 12 . Subsequently, when the user continues to rotate the detachable ring 12 , the bottom surface of the positioning hole 11 d is brought gradually closer to the distal end surface of the rotation stopping portion 34 . Then, the contact portion 22 c of the second pin member 22 provided in the adapter main body 11 is brought into contact with the contact surface portion 41 a arranged on the distal end surface of the distal end portion main body 32 .
- control portion 4 provided to the endoscope main body portion 2 can determine the type of the distal end adapter based on the resistance value of the resistor 7 and drive the power supply and the video processor under the optimal condition.
- the contact portions 22 c of the second pin members 22 configuring the pair of electrical connection members 26 of the adapter side connection portion 20 is arranged on the contact surface portion 41 a of the terminal member 41 configuring the endoscope side connection portion 40 so as to be urged by the urging force of the coil springs 24 configuring the electrical connection member 26 .
- the LED 14 mounted on the LED holding plate 18 is electrically connected to the electrical cable extended from the power supply portion via a flexible substrate 43 , the terminal member 41 configuring the endoscope side connection portion 40 , the second pin member 22 configuring the adapter side connection portion 20 , the case body 23 , the coil spring 24 , the first pin member 21 , the flexible substrate 19 , the LED electrode 28 .
- the distal end lens cover 35 a of the image-forming optical system 35 provided in the rotation stopping portion 34 which configures the distal end portion main body 32 is configured to face the second optical lens 16 d which is one of the side view optical systems 16 provided in the distal end adapter 10 , in a predetermined positional relationship.
- a side view observation optical system 51 is configured in such a manner that the optical axis of the side view optical system 16 is made coincident with the optical axis of the image-forming optical system 35 , and that an optical image passing through the observation window 16 a, the prism 16 b, the first optical lens 16 c, the second optical lens 16 d, the distal end lens cover 35 a, the optical lens 35 b, the optical lens 35 c, the lens cover 35 d, and the cover glass 35 e is formed on the image pickup surface of the image pickup device 36 a.
- the LED 14 mounted on the LED holding plate 18 is brought into a light-emitting state by supplying electric power to the LED 14 via the electrical cable, so as to illuminate an observation site.
- the optical image of the observation site illuminated by the LED 14 is formed on the image pickup surface of the image pickup device 36 a.
- the contact surface portion 41 a of the terminal member 41 provided in the endoscope side connection portion 40 is configured to have a large diameter.
- the second pin member 22 provided in the adapter side connection portion 20 is urged in the projecting direction by the coil spring 24 provided in the adapter side connection portion 20 . Therefore, when the distal end adapter 10 provided with the adapter side connection portion 20 is attached to the distal end portion 3 a provided with the endoscope side connection portion 40 , the electrical connection state can be obtained in such a way that the contact portion 22 c of the second pin member 22 provided in the adapter side connection portion 20 is brought into contact with the contact surface arrangement portion 41 a of the terminal member 41 in the urged state, that is, the contact portion 22 c is pressed against the contact surface arrangement portion 41 a by a predetermined pressing force.
- the present embodiment assumes that the side view type adapter is used as the distal end adapter 10 of the adapter type endoscope 50 .
- the distal end adapter is not limited to the side view type adapter provided with the side view optical system.
- the distal end adapter may be a direct view type adapter provided with the direct view optical system as the observation optical system as shown in FIGS. 20 to 24 , a direct view type adapter for stereoscopic observation (hereinafter referred to as stereo direct view type) as shown in FIGS. 25 to 28 , and a stereo direct view type adapter including a channel hole as shown in FIGS. 29 to 32 .
- a direct view type distal end adapter 10 A attachable to the distal end portion 3 a is configured by mainly including the adapter main body 11 A, the detachable ring 12 , and the hood portion 13 A.
- An illumination hole 61 and an optical portion hole 62 are provided in the hood portion 13 A.
- the illumination hole 61 has a substantially cylindrical shape, and the plurality of LEDs 14 are faced from the distal end surface of the illumination hole 61 .
- An observation window 71 , and the like, which configures a direct view optical system 70 is arranged in the optical portion hole 62 .
- the LEDs 14 are arranged in an opposing positional relationship so as to sandwich the observation window 71 .
- the pair of LED electrodes 28 are arranged on the side of one of the LEDs 14 , which is positioned on the lower side in the figure.
- the LEDs 14 and the LED electrodes 28 are provided on the substrate 9 fixed to the LED holding plate 18 A.
- the LED holding plate 18 A is arranged integrally on the distal end surface of the adapter main body 11 A.
- a pattern 9 b is formed beforehand on the substrate 9 .
- the pair of LEDs 14 and the pair of LED electrodes 28 are provided at predetermined positions of the pattern 9 b.
- the contact portion 14 a of the LED 14 and the head portion 28 a of the LED electrode 28 which are provided on the substrate 9 , are electrically connected to each other by the wiring member 8 . Further, the pattern 9 b and the contact portion 14 a of the LED 14 are electrically connected to each other by the wiring member 8 .
- the interval between the pair of LED electrodes 28 is different from the interval of the pair of first pin members 21 of the adapter side connection portion 20 .
- the electrical connection between the LED electrode 28 and the first pin member 21 is effected, for example, by a substantially fan-shaped rigid substrate 63 , for the purpose of pitch adjustment.
- the fan-shaped substrate 63 includes, on the inner circular arc side, first contact pins 64 corresponding to the first pin members 21 , and includes, on the outer circular arc side, second contact pins 65 corresponding to the LED electrodes 28 .
- the pair of first pin members 21 are electrically connected similarly to the flexible substrate 19 .
- the interval between the first contact pins 64 is configured to be smaller than the interval between the second contact pins 65 to which the pin portions 28 b are electrically connected.
- a resistor 7 A for determining the type of the distal end adapter is mounted also on the fan-shaped substrate 63 .
- the resistance value of the resistor 7 A is different from the resistance value of the resistor 7 .
- the adapter main body 11 A includes a cutout 11 Aa. The cutout 11 Aa is formed so that the worker can visually recognize the resistor 7 A mounted on the fan-shaped substrate 63 .
- the reference character 73 denotes adhesive.
- the reference character 18 Aa denotes a cutout included in the LED holding plate 18 A.
- the reference character 74 is a fastening screw with which the hood portion 13 A and the adapter main body 11 A are integrally fastened.
- Electric elements may be mounted on the fan-shaped substrate 63 .
- the fan-shaped substrate is thus provided to the direct view type distal end adapter, and on the fan-shaped substrate is mounted a resistor, a resistance value of which is different from that of the resistor included in the side view type distal end adapter, thereby facilitating the determination of the distal end adapter.
- the configuration of the direct view type adapter makes it possible to prevent accidental contact of the resistor mounted on the fan-shaped substrate with other electronic components and bad electrical contact of the resistor, and also makes it possible for the worker to visually recognize the resistance value of the resistor at the time of assembly work for integrally fixing the adapter main body to the hood portion.
- the LED electrodes 28 and the pair of first pin members 21 of the adapter side connection portion 20 are connected by a flexible substrate 19 B similarly as in the side view type distal end adapter.
- the distal end adapter 10 B is configured by mainly including an adapter main body 11 B, the detachable ring 12 , and a hood portion 13 B.
- the hood portion 13 B is provided with the illumination hole 61 and the optical portion hole 62 which are similar to those provided to the hood portion 13 A.
- a plurality of LEDs 14 face the illumination hole 61 , and an observation window 71 B and the like, which configure a stereo direct view optical system 70 B by including a pupil optical system 75 , are arranged in the optical portion hole 62 .
- the LEDs 14 are arranged in an opposing positional relationship so as to sandwich the observation window 71 B.
- a pair of LED electrodes 28 are arranged on the side of one of the LEDs 14 , which is positioned on the lower side in FIG. 25 .
- the LED electrodes 28 and the pair of first pin members 21 of the adapter side connection portion 20 are electrically connected by the flexible substrate 19 B.
- a resistor 7 B for determining the type of the distal end adapter.
- the resistance value of the resistor 7 B is different from the resistance values of the resistors 7 and 7 A.
- the reference character 76 denotes a pupil optical lens frame which also serves as the LED holding plate. Other configurations are the same as those of the distal end adapter 10 A. The same components are attached with the same reference characters and the descriptions thereof will be omitted.
- the resistor 7 B the resistance value of which is different from those of the resistors 7 and 7 A, is thus mounted on the flexible substrate 19 B, thereby enabling the same working and effect as those of the above-described distal end adapters 10 and 10 A to be obtained.
- distal end adapter is assumed to be the stereo direct view type in the present embodiment.
- distal end adapter is not limited to the stereo direct view type, and the present configuration may be adopted in the stereo side view type distal end adapter.
- the resistor 7 B may be mounted on the flexible substrate 19 B so as to be positioned not on the side of the hood portion 13 B but on the side of the stereo direct view optical system 70 B. This configuration enables the worker to visually recognize the resistance value of the resistor 7 B from a gap between the flexible substrate 19 B and the pupil optical lens frame 76 .
- the present embodiment assumes that the resistor 7 B is mounted on the flexible substrate 19 B which electrically connects the LED electrodes 28 and the first pin members 21 .
- the resistor 7 B may be mounted on a flexible substrate 19 C, for example, which is a member different from the flexible substrate 19 B, and the flexible substrate 19 C on which the resistor 7 B is mounted may be connected to the LED electrodes 28 b or to the first pin members 21 as shown in the drawing.
- the flexible substrate 19 C may be connected to the substrate 9 , though the illustration thereof is omitted.
- the distal end adapter 10 C is the stereo direct view type including a channel hole
- a tubular member 81 configuring a channel hole 80 is arranged in an adapter main body 11 C, as shown in FIGS. 29 and 30 . Therefore, unlike in the case of the adapter 10 and the like, it is difficult to provide the D-shape space 10 S 1 or the distal end side space 10 S 2 in the distal end adapter 10 C of the present embodiment.
- the distal end adapter 10 C is configured by mainly including the adapter main body 11 C, the detachable ring 12 , and a hood portion 13 C.
- the hood portion 13 C is provided with a tubular member arranging hole 82 in addition to the illumination hole 61 and the optical portion hole 62 which are substantially the same as those provided to the above-described hood portion 13 B.
- the tubular member arranging hole 82 is provided the tubular member 81 for configuring the channel hole 80 .
- a plurality of LEDs 14 face the illumination hole 61 and an observation window 71 B and the like, which configure the stereo direct view optical system 70 B by including the pupil optical system 75 , are arranged in the optical portion hole 62 .
- the reference character 83 denotes a hood portion covering member which is provided on an outer periphery of the hood portion 13 B.
- the plurality of LEDs 14 are arranged in an opposing positional relationship so as to sandwich the observation window 71 B and an opening 80 o of the channel hole 80 as shown in FIG. 29 , and an adapter side connection portion 84 is arranged as shown in FIG. 32 .
- an end portion of an electrical cable 85 electrically connected to the adapter side connection portion 84 and extended therefrom is electrically connected to the LED electrodes 28 C respectively provided so as to sandwich the observation window 71 B and the channel hole 77 , as shown in FIG. 31 .
- a cutout hole 76 c is formed on the distal end side of the pupil optical lens frame 76 .
- the cutout hole 76 c is formed in a shape having openings on the distal end side and on the outer peripheral side, and is a space for arranging the resistor 7 C for determining the type of the distal end adapter.
- the resistor 7 C is mounted on a surface of the substrate 9 , which is opposite side of the surface on which the LEDs 14 are mounted.
- the resistance value of the resistor 7 C is different from the resistance values of the above-described resistors 7 , 7 A, and 7 B.
- the resistor 7 C the resistance value of which is different from those of the resistors 7 , 7 A, and 7 B, is thus mounted on the substrate 9 , thereby facilitating the determination of the distal end adapter same as in the cases of the distal end adapters 10 , 10 A, and 10 B.
- the space for arranging the resistor 7 C is formed as the cutout hole formed in the shape having openings on the distal end side and the outer peripheral side, thereby enabling the worker to visually recognize the resistor positioned in the space from the opening on the outer peripheral side.
- the distal end adapter is the stereo direct view type including a channel hole.
- the distal end adapter is not limited to the stereo direct view type including a channel hole, and the present configuration may be adopted in the stereo side view type distal end adapter including a channel hole.
- the present configuration may be adopted in distal end adapters in which it is difficult to provide the D-shape space 10 S 1 and the distal end side space 10 S 2 .
- an adapter 10 D may be configured by mounting a resistor 7 D, the resistance value of which is different from those of the resistors 7 to 7 C in the space on the mounting surface side of the substrate 9 . This enables the same working and the effect as those of the distal end adapter 10 C to be obtained.
- the reference character 13 D denotes a hood portion.
Abstract
An endoscope adapter including a light emitting diode includes: a detachable portion to be attached to an adapter attaching portion provided on a distal end portion of an insertion portion, the insertion portion including inside thereof at least one image-forming optical system; an adapter main body including an adapter side observation optical system whose optical axis is coincident with an optical axis of the image-forming optical system; a contact pin which enables power supply to the light emitting diode to be turned on when the detachable portion is attached to the adapter attaching portion; and a resistor arranged in a space formed in the endoscope adapter to determine a type of the endoscope adapter.
Description
- This application is a continuation under 37 C.F.R. §1.53(b) of prior application Ser. No. 12/358,493, filed Jan. 23, 2009, by Kazuhiro KANZAKI, et al., entitled ENDOSCOPE ADAPTER INCLUDING LIGHT EMITTING DIODE, AND ADAPTER TYPE ENDOSCOPE, the entire contents of which are incorporated herein by this reference.
- 1. Field of the Invention
- The present invention relates to an endoscope adapter including a light emitting diode, and to an adapter type endoscope configured by connecting the endoscope adapter.
- 2. Description of the Related Art
- Conventionally, endoscope apparatuses have been widely used in medical fields and industrial fields. The observation object of the endoscope is the inside of a living body, a pipe, and the like. Therefore, when an endoscopic examination is performed, a light source for illuminating the observation object is needed. In a common endoscope apparatus, a light source apparatus which supplies illumination light is prepared as an external apparatus of the endoscope. The illumination light emitted by the light source apparatus is supplied to a light guide provided in an insertion portion of the endoscope, and is transmitted to the distal end portion of the insertion portion via the light guide. Then, the illumination light is emitted towards the observation object from an illumination window arranged at the insertion portion distal end portion.
- In recent years, there is proposed an endoscope which, instead of transmitting the illumination light emitted by the light source apparatus to the distal end portion of the insertion portion via the light guide, is configured to have a light emitting device such as a light emitting diode (hereinafter abbreviated as LED) provided at the distal end portion of the insertion portion, and to illuminate the observation object with the light emitted by the light emitting device. In the case where the endoscope having the light emitting device provided at the distal end portion, is configured such that an image of the observation object illuminated by the light emitting device is picked up by an image pickup device, an electrical cable extended from the image pickup device, and an electrical cable for supplying electric power to the light emitting device are inserted in the insertion portion. This makes it possible to realize an endoscope having a small diameter and a simple configuration, and having a high performance.
- However, for an endoscope apparatus, a plurality of types of adapters are prepared and there is a case where the number of LEDs to be provided is different depending on the types of the adapters. The plurality of types of adapters are selectively and exchangeably attachable to an insertion portion. In such an endoscope apparatus, required amount of electric power is different depending on the number of LEDs to be provided to each of the adapters. Therefore, if appropriate amount of electric power can not be supplied to the LEDs depending on the adapter to be attached, appropriate amount of light required for illumination might not be obtained.
- In order to eliminate the defect, Japanese Patent Application Laid-Open Publication No. 2006-333945, for example, discloses an endoscope apparatus capable of easily obtaining appropriate amount of illumination light depending on a type of adapter to be attached, with a simple configuration. In the endoscope apparatus, when an adapter is attached to an insertion portion, for example, a power supply portion and an illumination portion are electrically connected and the type of adapter is determined using a resistor provided to the adapter. Based on the determination result, the amount of the electric power supplied from the power supply portion is corrected and the corrected amount of electric power is supplied to LEDs.
- In recent years, the adapters for endoscope apparatus include a direct view type and a side view type, and in addition, a plurality of types of adapters such as a monocular type, a stereo type and the like are prepared according to intended purposes, for the direct view type and the side view type, respectively. Some endoscope apparatus adapters are provided with various types of sensors including a temperature sensor. With a reduction in diameter of insertion portions of endoscopes, these adapters are reduced in size. With the reduction in size of the adapters, a space on an end surface of a connecting portion between the adapter and the insertion portion is reduced. This makes it difficult to arrange electric elements such as a resistor for determining the type of the adapter on the end surface on the adapter side.
- An endoscope adapter including a light emitting diode according to the present invention includes: a detachable portion to be attached to an adapter attaching portion provided on a distal end portion of an insertion portion, the insertion portion including inside thereof at least one image-forming optical system; an adapter main body including an adapter side observation optical system whose optical axis is coincident with an optical axis of the image-forming optical system; a contact pin which enables power supply to the light emitting diode to be turned on when the detachable portion is attached to the adapter attaching portion; and a resistor arranged in a space formed in the endoscope adapter to determine a type of the endoscope adapter.
- The above and other objects, features and advantages of the invention will become more clearly understood from the following description referring to the accompanying drawings.
-
FIG. 1 is a figure explaining an adapter type endoscope apparatus; -
FIG. 2 is a figure explaining an insertion portion distal end portion of the adapter type endoscope, and a side view type distal end adapter which can be detachably attached to the insertion portion distal end portion; -
FIG. 3 is a plan view when the side view type distal end adapter is viewed from the observation window side; -
FIG. 4 is a plan view when the side view type distal end adapter is viewed from the opening side of a detachable ring; -
FIG. 5 is a sectional view along the line V-V inFIG. 4 ; -
FIG. 6 is a sectional view along the line VI-VI inFIG. 5 . -
FIG. 7 is a perspective view explaining an adapter side electrical connection portion; -
FIG. 8 is a front view when the adapter side electrical connection portion is viewed from the side of a second pin member; -
FIG. 9 is a sectional view along the line IX-IX inFIG. 8 ; -
FIG. 10 is a figure explaining a configuration of a flexible substrate, and an opening shape of an adapter side connection portion arrangement hole; -
FIG. 11 is a figure explaining a state where a first pin member of the adapter side electrical connection portion fixed to the adapter side connection portion arrangement hole is electrically connected to an LED electrode by the flexible substrate; -
FIG. 12 is a plan view when the side view type distal end adapter in a state where a hood portion is removed, is viewed from the other surface side facing the one surface side; -
FIG. 13 is a plan view when the insertion portion distal end portion of the endoscope insertion portion is viewed from the front side; -
FIG. 14 is a sectional view along the line XIV-XIV inFIG. 13 ; -
FIG. 15 is a sectional view along the line XV-XV inFIG. 13 ; -
FIG. 16 is a sectional view along the line XVI-XVI inFIG. 13 ; -
FIG. 17 is a figure explaining a relationship between the endoscope side electrical connection portion and the endoscope side connection portion arrangement hole; -
FIG. 18 is a plan view when the adapter type endoscope in the state where the side view type distal end adapter is attached to the insertion portion distal end portion, is viewed from the one surface side of the distal end adapter; -
FIG. 19 is a sectional view along the line XIX-XIX inFIG. 18 ; -
FIG. 20 is a perspective view when the adapter type endoscope in the state where a direct view type distal end adapter is attached to the insertion portion distal end portion, is viewed from the front side of the distal end adapter; -
FIG. 21 is a perspective view when the direct view type distal end adapter in the state where the hood portion is removed, is viewed from the front side; -
FIG. 22 is a perspective view explaining a positional relationship and an electrical connection between a first pin member and an LED electrode, when the direct view type distal end adapter in the state where the hood portion is removed, is viewed from the side surface side; -
FIG. 23 is a sectional view along the line XXIII-XXIII inFIG. 20 ; -
FIG. 24 is a sectional view along the line XXIV-XXIV inFIG. 23 ; -
FIG. 25 is a longitudinal sectional view of a stereo direct view type distal end adapter; -
FIG. 26 is a sectional view along the line XXVI-XXVI inFIG. 25 ; -
FIG. 27 is a sectional view along the line XXVII-XXVII inFIG. 25 ; -
FIG. 28 is a view showing another arrangement example of a resistor for determination; -
FIG. 29 is a front view of a stereo direct view type distal end adapter including a channel hole; -
FIG. 30 is a sectional view along the line XXX-XXX inFIG. 29 ; -
FIG. 31 is a sectional view along the line XXXI-XXXI inFIG. 29 ; -
FIG. 32 is a rear view of the stereo direct view type distal end adapter including a channel hole; and -
FIG. 33 is a perspective view explaining a distal end adapter having a resistor for determination arranged on a substrate on which a plurality of LEDs are arranged. - In the following, embodiments according to the present invention will be described with reference to the accompanying drawings.
- As shown in
FIG. 1 , an adaptertype endoscope apparatus 1 is configured by including an endoscope main body portion 2, a long endoscope insertion portion (hereinafter abbreviated as insertion portion) 3 provided, for example, with a bendingportion 3 b, and adistal end adapter 10 as an endoscope adapter. An adapter type endoscope is configured by attaching thedistal end adapter 10 to adistal end portion 3 a (as will be described below) of theinsertion portion 3. - The endoscope main body portion 2 is formed in a substantially box shape, and a
control portion 4, and the like, is provided inside the endoscope main body portion 2. Amonitor 5 for displaying an endoscopic image, and the like, is provided, for example, on the front surface side of the top surface portion of the endoscope main body portion 2. Further, anoperation panel 6 for performing the bending operation of the bendingportion 3 b provided in theinsertion portion 3, and the like, are provided on the front surface of the endoscope main body portion 2. - The
insertion portion 3 is configured by providing successively from the distal end side, the insertion portion distal end portion (hereinafter abbreviated as distal end portion) 3 a, the bendingportion 3 b, and a flexible tube portion 3 c. Theinsertion portion 3 is configured such that the proximal end portion thereof is electrically and mechanically connected to the endoscope main body portion 2 via a connecting portion (not shown). Thedistal end portion 3 a has in the inside thereof an image-forming optical system as will be described below. - The
distal end adapter 10 is configured so as to be detachably attached to thedistal end portion 3 a. In the present embodiment, thedistal end adapter 10 is a side view type configured to observe a direction perpendicular to the longitudinal axis direction of theinsertion portion 3, that is, a so-called side view direction, and includes a side view optical system (as will be described below) as an adapter side observation optical system. - As shown in
FIG. 2 andFIG. 3 , thedistal end adapter 10 is mainly configured by including adetachable ring 12, ahood portion 13, and an adaptermain body 11 which will be described below and is shown inFIG. 5 . Thehood portion 13 is a substantially cylindrical exterior member whose distal end portion is formed as a curved surface. Anillumination hole 15 and anoptical portion hole 17 are formed on the side of oneside surface 13 a of thehood portion 13. A plurality of light emitting devices, such as for example, LED chips (hereinafter abbreviated as LEDs) 14 faces theillumination hole 15. Anobservation window 16 a, which configures a side viewoptical system 16, is arranged in theoptical portion hole 17. - On the other hand, as shown in
FIG. 2 andFIG. 17 , thedistal end portion 3 a of theinsertion portion 3 is mainly configured by anexterior portion 31 and a distal end portionmain body 32. Theexterior portion 31 has an adapter attaching portion on a distal end side of an outer peripheral surface thereof. The adapter attaching portion includes a firstmale screw portion 33 a which is projectingly provided, and includes at a proximal end side thereof a secondmale screw portion 33 b which is projectingly provided. The firstmale screw portion 33 a is formed narrower than the secondmale screw portion 33 b. A slidingportion 33 c is formed between the firstmale screw portion 33 a and the secondmale screw portion 33 b. - A
rotation stopping portion 34 andcontact surface portions 41 a of a pair ofterminal members 41, and the like, are projectingly provided on adistal end surface 32 a of the distal end portionmain body 32. The pair ofterminal members 41 configure a conductive portion of an endoscope side electrical connection portion (hereinafter abbreviated as endoscope side connection portion) 40. Therotation stopping portion 34 is configured as a projecting portion having a substantially D-shaped cross section. That is, therotation stopping portion 34 is provided with plane portions which face each other and configure side surfaces, and with curved surface portions which connect the plane portions to each other. Therotation stopping portion 34 serves as a positioning mechanism for positioning thedistal end adapter 10 attached to thedistal end portion 3 a, and also serves as a protection mechanism for protecting thecontact surface portion 41 a of theterminal member 41. Note thatreference character 35 a denotes a distal end lens cover which is provided for protecting an image-formingoptical system 35. - In the following, the configurations of the
distal end adapter 10 and thedistal end portion 3 a will be specifically described, respectively. - First, the
distal end adapter 10 will be described with reference toFIGS. 4 to 12 . - As shown in
FIG. 4 , thedistal end adapter 10 is configured symmetrically with respect to the vertical axis Va as the center line in the figure. As shown inFIG. 5 , thedistal end adapter 10 is configured by including the adaptermain body 11, thedetachable ring 12, thehood portion 13, anLED holding plate 18, aflexible substrate 19, an adapter side electrical connection portion (hereinafter abbreviated as adapter side connection portion) 20, and the like. - The adapter
main body 11 is an apparatus main body, which has a cylindrical shape formed of, for example, a metal member as a rigid member and is provided with a projectingportion 11 a at the distal end side of the cylindrical shape. The projectingportion 11 a is configured by forming one end of the adaptermain body 11 in a shape of a pair of projections as will be described below and as shown inFIGS. 10 to 12 . As shown inFIG. 5 , in the adaptermain body 11, there are formed a supportingportion 11 b, anoptical hole 11 c, apositioning hole 11 d, and an adapter side connection portion arrangement hole (hereinafter abbreviated first connection portion hole) 11 e, in addition to the projectingportion 11 a. - A
prism 16 b which configures the side viewoptical system 16 is provided on the supportingportion 11 b. A firstoptical lens 16 c, a secondoptical lens 16 d, a space ring, a diaphragm, and the like, are arranged in theoptical hole 11 c. The opening shape of thepositioning hole 11 d has the same approximate D shape as the external shape of therotation stopping portion 34, and therotation stopping portion 34 is inserted into thepositioning hole 11 d. An abutting pin arrangement recessedportion 11 f is provided on the side of the firstconnection portion hole 11 e of thepositioning hole 11 d. The adapterside connection portion 20 is fixed in the firstconnection portion hole 11 e of thepositioning hole 11 d. The opening shape of the firstconnection portion hole 11 e is a shape of the horizontally oriented figure of 8 as will be described below and as shown inFIG. 10 .Reference numeral 29 denotes an O ring and is arranged in acircumferential groove 11 g formed on the proximal end side of the adaptermain body 11. - As shown in
FIG. 4 , thedetachable ring 12, which is a detachable portion and has a substantially tubular shape, is formed concentrically to the adaptermain body 11, so as to be rotatably connected to the adaptermain body 11. On the proximal end side inner peripheral surface of thedetachable ring 12, as shown inFIG. 2 , there is provided afemale screw portion 12 a into which themale screw portions - As shown in
FIG. 5 , thehood portion 13 is an exterior member, at the distal end portion of which the curved surface portion is formed as described above. The opening on the side of the proximal end portion of thehood portion 13 is fixed integrally to the adaptermain body 11, for example, by adhesion.LEDs 14 mounted on theLED holding plate 18 are arranged in theillumination hole 15 having an opening on the side of the oneside surface 13 a of thehood portion 13. Further, theobservation window 16 a, a space ring, a diaphragm, and the like, which configure the side viewoptical system 16 are fixed in theoptical portion hole 17 having an opening on the side of the oneside surface 13 a of thehood portion 13. - The
LED holding plate 18 is arranged integrally with the distal end surface side portion of the adaptermain body 11. Asubstrate 9 is arranged on a substrate arrangement surface 18 a of theLED holding plate 18. Apattern 9 a, for example, as shown inFIG. 3 is formed beforehand on thesubstrate 9. On thesubstrate 9, there are mounted theLEDs 14 and a pair ofLED electrodes 28 as element electrodes.Wiring members 8 are respectively electrically connected between ahead portion 28 a of theLED electrode 28 provided on thesubstrate 9 and acontact portion 14 a of theLED 14, and between thepattern 9 a and acontact portion 14 a of theLED 14.Reference numeral 28 b denotes a pin portion of theLED electrode 28, and one end side of theflexible substrate 19 is electrically connected to thepin portion 28 b. - The adapter
side connection portion 20 will be described with reference to the drawings. - As shown in
FIG. 5 ,FIG. 7 , andFIG. 9 , the adapterside connection portion 20 is a contact pin unit which is configured by a pair ofcase bodies 23,first pin members 21 configuring a contact pin,second pin members 22 configuring an abutting pin, coil springs 24 serving as an urging member, and an adapterside insulating portion 25 configuring an outer sheath. Thefirst pin member 21, thesecond pin member 22, thecase body 23, and thecoil spring 24 are conductive members which are formed of aluminum, brass, iron, or the like, and the surface of which is plated with a high conductivity material such as gold. Thereference character 26 denotes an electrical connection member which is configured by arranging thefirst pin member 21, thesecond pin member 22 and thecoil spring 24 in thecase body 23. - The adapter
side insulating portion 25 is formed of a high heat resistance resin member, and integrally covers a pair ofelectrical connection members 26 so as to insulate the pair ofelectrical connection members 26 as conductive portions from each other. At the distal end portion of apin portion 22 b of thesecond pin member 22, there are provided fourcontact portions 22 c having a tapered shape which becomes thinner toward the distal end side. The fourcontact portions 22 c are formed by providing two V-shaped grooves in a cross shape in the pin distal end portion from the side of the distal end surface. - Here, the
electrical connection member 26 configured by thefirst pin member 21, thesecond pin member 22, thecase body 23, and thecoil spring 24 is described. - The
first pin member 21 is arranged on the distal end side of thecase body 23. Thefirst pin member 21 is provided with aflange portion 21 a, and theflange portion 21 a is fixed integrally with thecase body 23 by, for example, a conductive adhesive. In the fixed state, apin portion 21 b of thefirst pin member 21 is in the state of projecting from the distal end side of thecase body 23 by a predetermined amount. Thecoil spring 24 is slidably arranged in thecase body 23 to which thefirst pin member 21 is fixed. One end side of thecoil spring 24 is arranged in contact with the proximal end surface of theflange portion 21 a which configures thefirst pin member 21. Thesecond pin member 22 is slidably arranged in thecase body 23 in which thecoil spring 24 is arranged. In this arrangement state, the distal end surface of aflange portion 22 a of thesecond pin member 22 is arranged in contact with the proximal end side of thecoil spring 24. In this arrangement state, a caulkedportion 23 a configured by bending the entire periphery of the proximal end portion of thecase body 23 in the center axis direction is provided at a predetermined position. By providing the caulkedportion 23 a, thesecond pin member 22 of theelectrical connection member 26 is urged by the urging force of thecoil spring 24 in the axis direction, and thepin portion 22 b of thesecond pin member 22 projects from the proximal end side of thecase body 23 by a predetermined amount. The caulkedportion 23 a in theelectrical connection member 26 is to prevent thesecond pin member 22 from falling off. Thesecond pin member 22 which is in the projecting state by being urged by thecoil spring 24, is slidable in the axis direction. - The adapter
side connection portion 20 is configured in a state where the pair ofelectrical connection members 26 are arranged in parallel with each other at a predetermined interval. Theelectrical connection members 26 arranged in the adapterside connection portion 20 are covered by the adapterside insulating portion 25, so as to be insulated from each other by the adapterside insulating portion 25. In the present embodiment, the adapterside connection portion 20 is specifically configured by insert molding. For this reason, the end portion of thefirst pin member 21 covered by the adapterside insulating portion 25 is set in the state of projecting from the one end surface of the adapterside insulating portion 25 by a predetermined amount. Further, the end portion of thesecond pin member 22 covered by the adapterside insulating portion 25 is set in the state of projecting from the other end surface of the adapterside insulating portion 25 by a predetermined amount. - As shown in
FIG. 5 andFIGS. 7 to 9 , the adapterside insulating portion 25 is configured by including aneaves portion 25 e on the side of thesecond pin member 22. As shown inFIG. 8 , theeaves portion 25 e is provided so as to cover the one surface side (the upper side in the figure) of the pair ofcase bodies 23. Theeaves portion 25 e prevents a trouble caused by thecase body 23 electrically contacting therotation stopping portion 34. - As shown in
FIG. 8 andFIG. 9 , the adapterside insulating portion 25 is provided over the entire periphery of thecase body 23 which configures theelectrical connection member 26 of the adapterside connection portion 20. The thickness of the adapterside insulating portion 25 covering thecase body 23 is set to a dimension T except for the portion in which the electrical connection members are adjacent to each other. - Specifically, the thickness of an inter-pin adapter
side insulating portion 25 f which is an inter-pin insulating portion on a line perpendicular to the center axes of the pair ofelectrical connection members 26 configuring the adapterside connection portion 20, in other words, the thickness of the inter-pin adapterside insulating portion 25 f which is provided between thecase bodies 23 of theelectrical connection members 26 arranged adjacent to each other, is set to a dimension smaller than twice the thickness T (described as 2T—α a in the figure) of a circumferential insulatingportion 25 g which configures the adapterside insulating portion 25 covering the periphery of thecase body 23. - In the present embodiment, the thickness dimension of the inter-pin adapter
side insulating portion 25 f is reduced to be smaller than twice the thickness T of the circumferential insulatingportion 25 g, and the interval between the pair of adjacentelectrical connection members 26 is reduced as much as possible within a range in which the insulating state can be maintained. - In this way, the adapter
side connection portion 20 having an integral configuration is configured in such a way that the pair ofelectrical connection members 26, each of which is configured by arranging thefirst pin member 21, thesecond pin member 22, and thecoil spring 24 in thecase body 23, are provided in the adapterside insulating portion 25, so as to be in parallel with each other at a predetermined interval. Then, in this configuration, the thickness of the inter-pin adapterside insulating portion 25 f on the line perpendicular to the center axes of the pair ofelectrical connection members 26 of the adapterside connection portion 20 is set to a dimension smaller than thethickness 2T of the circumferential insulatingportion 25 g. - As a result, the thickness of the insulating portion connecting between the center axes of the pair of
electrical connection members 26 provided in the adapterside connection portion 20 is made smaller by a than the thickness in the case where the twoelectrical connection members 26, which are respectively provided with the adapterside insulating portion 25 having the thickness T around the periphery of thecase body 23, are arranged side by side. Specifically, the thickness dimension of the adapterside insulating portion 25 in the case where the pair ofelectrical connection members 26 provided with the adapterside insulating portion 25 having the thickness T are arranged side by side, becomes 4T as a whole, while the thickness of the insulating portion on the line connecting between the center axes of the pair ofelectrical connection members 26 provided in the adapterside connection portion 20 can be made smaller than 4T by α. - Therefore, in the adapter
side connection portion 20 configured such that the pair ofelectrical connection members 26 are arranged in parallel with the other at a predetermined interval so as to be integrated by providing the adapterside insulating portion 25, the thickness of the inter-pin adapterside insulating portion 25 f is set smaller than 2T, so as to thereby reduce the longitudinal width dimension of the adapterside connection portion 20. As a result, it is possible to further reduce the diameter of thedistal end adapter 10. - Further, the adapter
side connection portion 20 in which the pair ofelectrical connection members 26 are integrally configured, is arranged on the lower side from the horizontal axis Ha of thedistal end adapter 10 as shown inFIG. 4 . In the configuration in which two electrical connection members are respectively arranged on both sides of the horizontal axis Ha, the optical axis horizontal axis OHa of theoptical hole 11 c cannot be arranged eccentrically upward by β in the figure with respect to the horizontal axis Ha. However, with the above described configuration, the optical axis horizontal axis OHa of theoptical hole 11 c can be arranged eccentrically upward by β in the figure with respect to the horizontal axis Ha, and thereby the diameter of thedistal end portion 3 a can be reduced. - As shown in
FIG. 4 ,FIG. 7 , andFIG. 8 , a first recessedportion 25 a and a second recessedportion 25 b having an abuttingsurface 25 d are provided on the side surface portion of the adapterside insulating portion 25 which configures the adapterside connection portion 20. The first recessedportion 25 a has a predetermined recessed shape which is opened on the proximal end surface side, and has an abuttingsurface 25 c in an intermediate portion between the proximal end surface side and the distal end side. Similarly to the first recessedportion 25 a, the second recessedportion 25 b has a predetermined recessed shape which is opened on the proximal end surface side, and has the abuttingsurface 25 d in the intermediate portion. As shown inFIG. 8 , the first recessedportion 25 a and the second recessedportion 25 b are formed in an opposing positional relationship substantially at the center of both the planar shaped side surfaces positioned one above the other in the figure, that is, between the electrical connection members. - The abutting surfaces 25 c and 25 d are positioning surfaces for setting the arrangement position of the adapter
side connection portion 20. The abutting surfaces 25 c and 25 d are respectively brought into contact, as will be described below and as shown inFIG. 10 , with anabutting end surface 11 m which is a positioning portion of projectingportion 11 h, and with anabutting end surface 11 n which is a positioning portion of a projectingportion 11 k. The forming positions of the abuttingsurfaces first pin members 21 to the abuttingsurface 25 c is equal to the distance from the distal end surface of the other of thefirst pin members 21 to the abuttingsurface 25 d. In other words, the abuttingsurfaces portions side insulating portion 25 at the same distance from the proximal end side end surface of the adapterside insulating portion 25. - Also, when the adapter
side insulating portion 25 of the adapterside connection portion 20 is viewed from the front surface side in the state where thecontact portions 22 c of the pair ofsecond pin members 22 are set to face the front surface, the external shape of the adapterside insulating portion 25 on the side of thesecond pin members 22 is an approximate figure-of-8 shape. On the other hand, when the adapterside insulating portion 25 of the adapterside connection portion 20 is viewed from the front surface side in the state where the distal ends of the pair offirst pin members 21 are set to face the front surface, the external shape of the adapterside insulating portion 25 on the side of thefirst pin members 21 is an approximate elliptic shape, in other words, a figure-of-0 shape. - Note that the shape of the first recessed
portion 25 a and the shape of the second recessedportion 25 b are made different from each other so as to prevent the reverse assembling, and are configured such that the projectingportion 11 h is inserted and arranged in the first recessedportion 25 a, and the projectingportion 11 k is inserted and arranged in the second recessedportion 25 b. - The adapter
side connection portion 20 is fixed in the firstconnection portion hole 11 e shown inFIG. 10 . The opening shape of the firstconnection portion hole 11 e is an approximate figure-of-8 shape, which shape is arranged in parallel with the horizontal axis Ha. The firstconnection portion hole 11 e is formed by including the first projectingportion 11 h and the second projectingportion 11 k which project in the central direction of the hole and are in parallel with the longitudinal axis. - When the adapter
side connection portion 20 is inserted and arranged in the firstconnection portion hole 11 e, the first projectingportion 11 h of the firstconnection portion hole 11 e is inserted into the first recessedportion 25 a on the side of thesecond pin member 22 of the adapterside connection portion 20. Further, the second projectingportion 11 k of the firstconnection portion hole 11 e is inserted into the second recessedportion 25 b of the adapterside connection portion 20. - In this insertion state, the adapter
side connection portion 20 is pushed into the firstconnection portion hole 11 e. Then, after thesecond pin member 22 is made to project from the proximal end side opening, theabutting end surface 11 m of the first projectingportion 11 h is brought into contact with the abuttingsurface 25 c, and theabutting end surface 11 n of the second projectingportion 11 k is brought into contact with the abuttingsurface 25 d. Thereby, the adapterside connection portion 20 is arranged in the firstconnection portion hole 11 e in a predetermined state. In this arrangement state, thesecond pin member 22 of the adapterside connection portion 20 is arranged at a predetermined position in the abutting pin arrangement recessedportion 11 f in a predetermined state. - The
flexible substrate 19 electrically connects the pair offirst pin members 21 to thepin portions 28 b of the pair ofLED electrodes 28. To this end, a pair offirst contact portions 19 a for electrical connection with the pair offirst pin members 21, and a pair ofsecond contact portions 19 b for electrical connection with the pair ofpin portions 28 b, are provided on the respective end portion sides of theflexible substrate 19. The interval between thefirst contact portions 19 a is configured so as to correspond to the adapterside connection portion 20 which is a member for effecting the reduction in the diameter. The interval between thesecond contact portions 19 b is set larger so as to correspond to the arrangement position of thepattern 9 a and theLED electrodes 28 which are arranged in consideration of the workability at the time of connecting thewiring member 8, and the like. That is, the interval between thesecond contact portions 19 b is formed larger than the interval between thefirst contact portions 19 a. - The
distal end adapter 10 is provided with aresistor 7 for determining the type of the distal end adapter. Specifically, as shown inFIGS. 5 and 6 , theresistor 7 is arranged in a D-shape space 10S1 configured of thehood portion 13 and theLED holding portion 18 so as to face an inner surface of thehood portion 13 of theflexible substrate 19. The mounting position of theresistor 7 on theflexible substrate 19 is not limited in the D-shape space 10S1, and may be in a distal end side space 10S2 configured of thehood portion 13 and theLED holding plate 18 as shown by the dashed lines, for example. - The
resistor 7 is mounted on aresistor contact 19 c formed on theflexible substrate 19 shown inFIG. 10 . Theresistor 7 of different resistance value is mounted for each type of the distal end adapter. - The resistor for determining the type of the distal end adapter is thus mounted on the flexible substrate electrically connecting the pair of first pin members and the pin portions of the pair of LED electrodes. The resistor mounted on the flexible substrate is arranged in the D-shape space or in the distal end side space. This prevents accidental contact of the resistor with other electronic components and bad electrical contact of the resistor.
- In addition, the resistor is mounted on the flexible substrate so as to face the inner surface of the hood portion, which enables an assembly worker (hereinafter abbreviated as worker) to visually recognize a resistance value of the resistor at the time of assembly work for integrally fixing the adapter main body to the hood portion. As a result, wrong assembly can be prevented.
- Note that, as shown by the dashed lines in
FIG. 5 , theresistor 7 may be electrically connected to thefirst pin member 21. Furthermore, in addition to theresistor 7, an electric element such as a temperature sensor may be arranged on theflexible substrate 19. - Here, a method for attaching the adapter
side connection portion 20 to the adaptermain body 11 will be described with reference toFIGS. 10 to 12 . - When the adapter
side connection portion 20 is attached to the adaptermain body 11, the worker applies an adhesive to the plane surface side and the curved surface side of the adapterside insulating portion 25, which are the side surface portion of the adapterside connection portion 20. Then, as described above, the worker inserts the side of thesecond pin member 22 of the adapterside connection portion 20 from the distal end side opening of the firstconnection portion hole 11 e shown inFIG. 10 . At this time, the worker makes the first projectingportion 11 h inserted in the first recessedportion 25 a, and makes the second projectingportion 11 k inserted in the second recessedportion 25 b. - And in this inserted state, the worker pushes the adapter
side connection portion 20 into the firstconnection portion hole 11 e, so as to bring the abuttingsurface 25 c into contact with theabutting end surface 11 m of the first projectingportion 11 h, and to bring the abuttingsurface 25 d into contact with theabutting end surface 11 n of the second projectingportion 11 k. Then, the worker holds the contact state of the abuttingsurfaces side connection portion 20 with the abutting end surfaces 11 m and 11 n until the adhesive is cured. - Thereby, the adapter
side connection portion 20 is integrally fixed to the adaptermain body 11. At this time, thepin portions 21 b of the pair offirst pin members 21 are aligned so as to project from the end surface of the distal end side opening to the distal end side by a predetermined amount, and thepin portions 22 b of the pair ofsecond pin members 22 are aligned so as to project in the abutting pin arrangement recessedportion 11 f from the bottom surface of the abutting pin arrangement recessedportion 11 f by a predetermined amount. - Then, as shown in
FIG. 11 andFIG. 12 , theflexible substrate 19 is bent and housed in the space formed by the projectingportion 11 a and theLED holding plate 18. Thefirst contact portions 19 a provided on theflexible substrate 19 are arranged in a predetermined state with respect to thepin portions 21 b of the respectivefirst pin members 21. Then, one of thepin portions 21 b and one of thefirst contact portions 19 a are electrically connected to each other with, for example,solder 30, as shown inFIG. 5 . Further, the other of thefirst pin portions 21 b and the other of thefirst contact portions 19 a are electrically connected to each other withsolder 30. - In this way, the first
connection portion hole 11 e whose opening shape is an approximate figure-of-8 shape, is formed in thedistal end adapter 10. On the other hand, the first recessedportion 25 a having the abuttingsurface 25 c and the second recessedportion 25 b having the abuttingsurface 25 d are provided on the side surface portion of the plane surface side of the adapterside insulating portion 25 which configures the adapterside connection portion 20. - Thereby, the external shape of the adapter
side insulating portion 25 on the side of thesecond pin member 22 becomes an approximate figure-of-8 shape which coincides with the opening shape of the firstconnection portion hole 11 e. Also, the respective distances from the abuttingsurfaces portions contact portion 22 c of thesecond pin member 22 are set to be equal to each other, so that the abuttingsurface - For this reason, when the adapter
side insulating portion 25 having the figure-of-8 shaped portion is inserted and arranged in the firstconnection portion hole 11 e having the figure-of-8 shaped opening, the abuttingsurface 25 c of the first recessedportion 25 a is brought into contact with theabutting end surface 11 m of the first projectingportion 11 h provided in the firstconnection portion hole 11 e, and also the abuttingsurface 25 d of the second recessedportion 25 b is brought into contact with theabutting end surface 11 n of the second projectingportion 11 k provided in the firstconnection portion hole 11 e. - Thereby, the adapter
side connection portion 20 is positioned and arranged in the predetermined position with respect to the firstconnection portion hole 11 e of thedistal end adapter 10. Further, in this abutting arrangement state, the adapterside connection portion 20 is integrally fixed to thedistal end adapter 10, so that the pair offirst pin members 21 and the pair ofsecond pin members 22 can be arranged in the predetermined position and in the predetermined projecting state. - That is, in the present embodiment, it is possible for the worker to easily perform a work for arranging the pair of
electrical connection members 26 each having thefirst pin member 21, thesecond pin member 22, and the like, in the predetermined position and in the predetermined state, by arranging the adapterside connection portion 20 in the firstconnection portion hole 11 e in the predetermined state without arranging the two electrical connection members one by one. - Further, in order to position and arrange the adapter
side connection portion 20 in the predetermined position with respect to the firstconnection portion hole 11 e of thedistal end adapter 10, the first recessedportion 25 a and the second recessedportion 25 b which respectively have the end surfaces, are formed in the side surface portion of the adapterside insulating portion 25 of the adapterside connection portion 20, and the end surfaces of the recessedportions surfaces portion 11 h which is inserted and arranged in the first recessedportion 25 a, and the second projectingportion 11 k which is inserted and arranged in the second recessedportion 25 b, are provided in the firstconnection portion hole 11 e. Also, the distal end surfaces of the projectingportions abutting end surface 11 m which is brought into contact with the abuttingsurface 25 c of the first recessedportion 25 a, and as theabutting end surface 11 n which is brought into contact with the abuttingsurface 25 d of the second recessedportion 25 b. - Therefore, when the adapter
side connection portion 20 is arranged in the firstconnection portion hole 11 e, theabutting end surface 11 m of the first projectingportion 11 h is brought into contact with the abuttingsurface 25 c of the first recessedportion 25 a, and theabutting end surface 11 n of the second projectingportion 11 k is brought into contact with the abuttingsurface 25 d of the second recessedportion 25 b. Thereby, the adapterside connection portion 20 can be arranged in the state of being positioned. - That is, the adapter
side connection portion 20 is positioned and arranged by bringing the abutting end surfaces 11 m and 11 n into contact with the abuttingsurfaces side insulating portion 25, without providing a flange portion, or the like, which projects from the outer peripheral surface of the adapterside insulating portion 25 configuring the maximum external shape of the adapterside connection portion 20. Thereby, it is possible to position and arrange the adapterside connection portion 20 in thedistal end adapter 10, and to fix the adapterside connection portion 20 to thedistal end adapter 10, without largely forming the external shape ofdistal end adapter 10. - Note that in the above described explanation, it is assumed that the adhesive is applied beforehand to the side surface portions of the plane surface side and the curved surface side of the adapter
side insulating portion 25 which configures the adapterside connection portion 20. However, it may also be configured such that after the adapterside connection portion 20 is arranged in the firstconnection portion hole 11 e in the predetermined state, an adhesive having excellent fluidity is poured in the gap between the adapterside connection portion 20 and the firstconnection portion hole 11 e, and thereby the adapterside connection portion 20 and the firstconnection portion hole 11 e are stuck and fixed to each other. - Further, in the above described explanation, it is assumed that after the adapter
side connection portion 20 is fixed to the firstconnection portion hole 11 e, thefirst pin portion 21 b and thefirst contact portion 19 a of theflexible substrate 19 are electrically connected to each other. However, it may also be configured such that the adapterside connection portion 20 in the state where thefirst pin portion 21 b is electrically connected to thefirst contact portion 19 a of theflexible substrate 19, is arranged in the firstconnection portion hole 11 e in a predetermined state, and thereafter fixed in this state. - Further, the present embodiment is configured such that the pair of
first pin members 21, the pair ofsecond pin members 22, and the like, are provided in the adapterside connection portion 20. However, when three or more of thepin members side insulating portion 25 in the state where a required number ofelectrical connection members 26 are arranged in parallel with each other at predetermined intervals. - Next, the
distal end portion 3 a and the endoscopeside connection portion 40 fixed to thedistal end portion 3 a will be described with reference toFIGS. 13 to 17 . - As shown in
FIG. 13 , thedistal end portion 3 a is configured symmetrically with respect to the vertical axis Vc as the center line in the figure. As described above with reference toFIG. 2 , thedistal end portion 3 a is configured mainly by theexterior portion 31 and the distal end portionmain body 32 which is the apparatus main body. Therotation stopping portion 34, and thecontact surface portion 41 a of theterminal member 41 which configures the endoscopeside connection portion 40, are provided so as to project on the distal end side of the distal end portionmain body 32. Therotation stopping portion 34 is configured so as to be inserted and arranged in thepositioning hole 11 d. Also, thedistal end adapter 10 and thedistal end portion 3 a are set in a predetermined positional relationship by arranging the substantially D-shapedrotation stopping portion 34 in the substantially D-shapedpositioning hole 11 d. - As shown in
FIG. 14 , in the distal end portionmain body 32 which configures thedistal end portion 3 a, there are provided the distal end lens cover 35 a, a steppedlens hole 32 b, and an image-pickup hole 32 c, which configure the image-formingoptical system 35. The steppedlens hole 32 b is a hole for arranging a plurality ofoptical lenses pickup hole 32 c is a hole for arranging animage pickup apparatus 36 provided with animage pickup device 36 a, such as a CCD. That is, a stepped through hole configured by the image-pickup hole 32 c and the steppedlens hole 32 b, which have different diameters, is formed in the distal end portionmain body 32. An image-pickup frame 36 b configuring theimage pickup apparatus 36 is arranged in the image-pickup hole 32 c. The image-pickup frame 36 b is a stepped tubular member having a substantially uniform thickness. In the present embodiment, the distal end part of the image-pickup frame 36 b is arranged in the image-pickup hole 32 c. Alens cover 35 d is arranged on the distal end side of the image-pickup frame 36 b, and acover glass 35 e is arranged on the proximal end side of the image-pickup frame 36 b. Thecover glass 35 e is stuck and fixed to a package glass (not shown) provided on the image pickup surface side of theimage pickup device 36 a. - An image pickup circuit substrate (not shown) is electrically and mechanically connected to the proximal end side of the
image pickup device 36 a. Electronic components, such as a capacitor and a transistor, are mounted on the image pickup circuit substrate. A signal line which is inserted in the signal cable (not shown) is electrically connected to the image pickup circuit substrate in a predetermined state. Theimage pickup device 36 a, the image pickup circuit substrate, and the like, are sealed by, for example, athermoplastic resin 36 c. - As shown in
FIG. 13 ,FIG. 14 , andFIG. 17 , an endoscope side connection portion arrangement hole (hereinafter described as second connection portion hole) 32 d is formed in the lower part of the distal end portionmain body 32 configuring thedistal end portion 3 a in the figure. The endoscopeside connection portion 40 is fixed in the secondconnection portion hole 32 d. The opening shape of the secondconnection portion hole 32 d is a figure-of-8 shape which is substantially the same as the opening shape of the firstconnection portion hole 11 e. Also, the secondconnection portion hole 32 d has the same configuration as that in the firstconnection portion hole 11 e. That is, a first projectingportion 32 e provided with a distal end side end surface 32 g, and a second projectingportion 32 f provided with a distal endside end surface 32 h, are formed in parallel to the longitudinal axis direction. - The endoscope
side connection portion 40 shown inFIGS. 13 to 17 is configured by the pair ofterminal members 41, and an endoscopeside insulating portion 42 which configures an exterior sheath. Theterminal member 41 is configured by including the disk-shapedcontact surface portion 41 a and a thin andlong rod portion 41 b. Thecontact portion 22 c of thesecond pin member 22 which configures the adapterside connection portion 20 is brought into contact with the disk shaped surface of thecontact surface portion 41 a. Therefore, the outer diameter of thecontact surface portion 41 a is configured to be larger than the outer diameter of therod portion 41 b, within a possible range in consideration of the contact state with thecontact portion 22 c. Note that theterminal member 41 is a conductive member, which is formed of aluminum, brass, iron, or the like, and the surface of theterminal member 41 is plated with a highly conductive material, such as for example, gold. - The endoscope
side insulating portion 42 covers the entire periphery of the pair ofterminal members 41 in an insulated state by leaving the proximal end side portion of therod portion 41 b of the pair ofterminal members 41. The pair ofterminal members 41 covered by the endoscopeside insulating portion 42 are arranged in parallel with each other at a predetermined interval. The endoscopeside insulating portion 42 is configured by a contact surfaceportion arrangement portion 42 a and a coveringportion 42 b. The contact surfaceportion arrangement portion 42 a is formed like a pedestal, and covers from the proximal end surface of thecontact surface portion 41 a to a part of therod portion 41 b. Thus, the remaining portion of the endoscopeside insulating portion 42, that is, the portion covering the intermediate portion of therod portion 41 b is the coveringportion 42 b. Note that in the present embodiment, the proximal end side surface of thecontact surface portion 41 a is in the state of being placed on the distal end surface of the contact surfaceportion arrangement portion 42 a. - A stepped surface formed in the boundary portion between the contact surface
portion arrangement portion 42 a and the coveringportion 42 b is a buttingsurface 42 c serving as a positioning surface. A part of thedistal end surface 32 a of the distal end portionmain body 32 including the distal end side end surfaces 32 g and 32 h is brought into contact with the buttingsurface 42 c. That is, the external shape of the contact surfaceportion arrangement portion 42 a is formed larger than the external shape of the coveringportion 42 b. - When the endoscope
side insulating portion 42 of the endoscopeside connection portion 40 is viewed from the front surface side in the state where the pair ofcontact surface portions 41 a are set to face the front surface, the external shape of the contact surfaceportion arrangement portion 42 a is an elliptic shape, in other words, in an approximate figure-of-0 shape. On the distal end surface of the contact surfaceportion arrangement portion 42 a, thecontact surface portions 41 a of the twoterminal members 41 are arranged so as to be separated from each other at a predetermined distance. The contact surfaceportion arrangement portion 42 a prevents the outer peripheral surface of thecontact surface portion 41 a from being brought into electrical contact with therotation stopping portion 34. Therefore, the external shape end surface of the contact surfaceportion arrangement portion 42 a is formed wider, in other words, larger than the outer peripheral surface of thecontact surface portion 41 a, so as to prevent the outer peripheral surface of thecontact surface portion 41 a from projecting to the outside from the external shape end surface of the contact surfaceportion arrangement portion 42 a. That is, thecontact surface portion 41 a is arranged on the contact surfaceportion arrangement portion 42 a in such a manner that any part of thecontact surface portion 41 a is prevented from being extended to the outside from the elliptic outline of the contact surfaceportion arrangement portion 42 a. - The covering
portion 42 b includes a first recessedportion 42 d and a second recessedportion 42 e. For this reason, when the coveringportion 42 b is viewed from the front surface side in the state where the proximal end surface of therod portion 41 b projecting from the coveringportion 42 b is set to face the front surface, the external shape of the coveringportion 42 b is an approximate figure-of-8 shape, which is smaller than the above described elliptic shape. - Note that the endoscope
side connection portion 40 is configured in such a way that in the state where the pair ofterminal members 41 are arranged in parallel with each other at the predetermined interval, the endoscopeside insulating portion 42 is provided so as to make theterminal members 41 covered and insulated from each other. In the present embodiment, specifically, the endoscopeside connection portion 40 is formed by insert molding. For this reason, thecontact surface portion 41 a of theterminal member 41 covered by the endoscopeside insulating portion 42 is integrally arranged in a close contact state with the contact surfaceportion arrangement portion 42 a. - Further, in the cross sectional shape shown in
FIG. 14 , the width dimension W of the coveringportion 42 b provided in the endoscopeside insulating portion 42 which configures the endoscopeside connection portion 40, is set smaller than the outer diameter dimension of thecontact surface portion 41 a of theterminal member 41. Further, the first projectingportion 32 e is inserted in the first recessedportion 42 d, and the second projectingportion 32 f is inserted in the second recessedportion 42 e. - That is, the adapter
side connection portion 20 is configured in such a way that the endoscopeside insulating portion 42 is provided around the pair ofterminal members 41 which are arranged in parallel with each other at a predetermined interval. In this configuration, theterminal member 41 is configured by including the disk shapedcontact surface portion 41 a and therod portion 41 b having a diameter smaller than that of thecontact surface portion 41 a. - The
contact surface portion 41 a is formed to have a large diameter in consideration of the contact property with thecontact portion 22 c provided in thesecond pin member 22. Also, thecontact surface portion 41 a is arranged on the pedestal-like wide contact surfaceportion arrangement portion 42 a without protruding from the contact surfaceportion arrangement portion 42 a. Therefore, thecontact surface portion 41 a is prevented from being brought into contact with the distal end portionmain body 32 and therotation stopping portion 34. - On the other hand, the
rod portion 41 b is formed to have a small diameter within a range in which the property as the conductive member is maintained. Also, therod portion 41 b is covered by the coveringportion 42 b and the contact surfaceportion arrangement portion 42 a while leaving a part of the proximal end portion. This prevents therod portions 41 b from being brought into contact with each other, and prevents therod portion 41 b from being brought into contact with the distal end portionmain body 32. In addition, the width dimension of the coveringportion 42 b which covers therod portion 41 b formed to have the small diameter, is made smaller than the outer diameter dimension of thecontact surface portion 41 a of theterminal member 41. Thereby, the reduction in the diameter of thedistal end portion 3 a is realized. - In this way, in the endoscope
side connection portion 40 which is integrally configured by providing the pair ofterminal members 41 each having thecontact surface portion 41 a and therod portion 41 b, and the endoscopeside insulating portion 42, it is possible to obtain thecontact surface portion 41 a which has a large diameter and effects sure contact with thecontact portion 22 c of thesecond pin member 22. It is also possible to reduce the width dimension of the coveringportion 42 b and it is thereby possible to reduce the diameter of thedistal end portion 3 a. - The endoscope
side connection portion 40 is fixed to the secondconnection portion hole 32 d as shown inFIG. 17 . When the endoscopeside connection portion 40 is inserted and arranged in the secondconnection portion hole 32 d, the side of therod portion 41 b which is exposed from the endoscopeside insulating portion 42 configuring the endoscopeside connection portion 40, is inserted from the distal end side opening of the secondconnection portion hole 32 d. At this time, the first projectingportion 32 e of the secondconnection portion hole 32 d is inserted into the first recessedportion 42 d of the coveringportion 42 b which configures the endoscopeside connection portion 40, and the second projectingportion 32 f of the secondconnection portion hole 32 d is inserted into the second recessedportion 42 e of the endoscopeside connection portion 40. - In this insertion state, the endoscope
side connection portion 40 is pushed into the secondconnection portion hole 32 d. Then, after therod portion 41 b is projected from the proximal end side opening, the buttingsurface 42 c is brought into contact with thedistal end surface 32 a of the distal end portionmain body 32, which surface includes the distal end side end surfaces 32 g and 32 h. - Thereby, the endoscope
side connection portion 40 is arranged in the secondconnection portion hole 32 d in a predetermined state. At this time, therod portion 41 b of theterminal member 41 which configures the endoscopeside connection portion 40, is arranged in a predetermined position in a terminal member arrangement recessedportion 32 k in a predetermined state. - Here, the attachment of the endoscope
side connection portion 40 to thedistal end portion 3 a is described with reference toFIG. 14 andFIG. 17 . - When attaching the endoscope
side connection portion 40 to thedistal end portion 3 a, the worker applies an adhesive to the side surface portion of the endoscopeside insulating portion 42, which is the side surface of the endoscopeside connection portion 40. Then, as described above, the worker inserts the side of therod portion 41 b which is exposed from the endoscopeside insulating portion 42 of the endoscopeside connection portion 40, from the distal end side opening of the secondconnection portion hole 32 d shown inFIG. 17 . At this time, the worker inserts the first projectingportion 32 e into the first recessedportion 42 d, and inserts the second projectingportion 32 f into the second recessedportion 42 e. In this insertion state, the worker pushes the endoscopeside connection portion 40 into the secondconnection portion hole 32 d. Then, the buttingsurface 42 c is brought into contact with thedistal end surface 32 a of the distal end portionmain body 32, which surface includes the distal end side end surfaces 32 g and 32 h. At this time, the worker holds the abutting state between the endoscopeside connection portion 40 and thedistal end surface 32 a of the distal end portionmain body 32, and makes the adhesive cured, so as to thereby fix the endoscopeside connection portion 40 to thedistal end portion 3 a. - Thereby, the pair of
terminal members 41 are fixed in the insulated state to the distal end portionmain body 32. In this fixed state, thecontact surface portion 41 a of the pair ofterminal members 41 is aligned so as to project by a predetermined amount from the distal end surface of the distal end portionmain body 32 to the distal end side. Further, the proximal end portion of therod portion 41 b of the pair ofterminal members 41 is arranged so as to project in the terminal member arrangement recessedportion 32 k by a predetermined amount from the bottom surface of the terminal member arrangement recessedportion 32 k. - Note that in this arrangement state, the
contact surface portion 41 a of theterminal member 41 is arranged on the recessed position side inside a virtual plane P which is in contact with the distal end of therotation stopping portion 34, and with the distal end of theexterior portion 31. In other words, thecontact surface portion 41 a is not projected outside the virtual plane P. For this reason, even when thedistal end portion 3 a collides with a door, or the like, the contact surface of the door, or the like, collides with thedistal end portion 3 a as shown by the virtual plane P, and thereby thecontact surface portion 41 a can be prevented from being damaged. - Further, in this arrangement state, the
contact surface portion 41 a of theterminal member 41 is arranged in a slightly recessed positional relation to the distal end side surface of theexterior portion 31. This makes it possible to prevent thecontact surface portion 41 a from being touched carelessly by the worker's finger. Also, even when a foreign matter adheres to the surface of thecontact surface portion 41 a, or when the surface of thecontact surface portion 41 a is stained, it is possible to easily clean the surface of thecontact surface portion 41 a, and to remove the foreign matter. - Further, the pair of
rod portions 41 b arranged in the terminal member arrangement recessedportion 32 k are electrically connected with solder to contactportions 43 a which are respectively provided at the other end portions of aflexible substrate 43. An electrical cable extended from the power supply portion not shown is electrically connected to one end portion of theflexible substrate 43. - In this way, the second
connection portion hole 32 d having the opening shape of the approximate figure-of-8 shape is formed on the distal end surface of the distal end portionmain body 32 which configures thedistal end portion 3 a. On the other hand, the recessedportions portion 42 b which configures the endoscopeside insulating portion 42 configuring the endoscopeside connection portion 40. Thereby, the external shape of the coveringportion 42 b configuring the endoscopeside insulating portion 42 becomes the approximate figure-of-8 shape which is coincident with the opening shape of the secondconnection portion hole 32 d. Then, the stepped portion formed by the contact surfaceportion arrangement portion 42 a and the coveringportion 42 b is used as the buttingsurface 42 c serving as the positioning surface. Thereby, when the figure-of-8 shaped endoscopeside insulating portion 42 is inserted and arranged in the figure-of-8 shaped secondconnection portion hole 32 d, the buttingsurface 42 c is brought into contact with the distal end surface of the distal end portionmain body 32, which surface includes the distal end side end surface 32 g of the first projectingportion 32 e and the distal endside end surface 32 f of the second projectingportion 32 h, which portions are provided in the secondconnection portion hole 32 d. - Thereby, the endoscope
side connection portion 40 is positioned and arranged in the predetermined position with respect to the secondconnection portion hole 32 d of thedistal end portion 3 a. In this contact arrangement state, the endoscopeside connection portion 40 is integrally fixed to thedistal end portion 3 a, so that the insulation of the pair of terminal members can be secured, and thecontact surface portion 41 a of the pair ofterminal members 41 and the pair ofrod portions 41 b can be arranged in the predetermined positions in the predetermined projecting state. - That is, in the present embodiment, it is possible for the worker to easily perform the work for arranging the two
terminal members 41 in the predetermined positions and in the predetermined state, by performing the work for fixing the endoscopeside connection portion 40 in the secondconnection portion hole 32 d. - Note that in the above described explanation, it is assumed that the adhesive is applied beforehand to the side surface portion of the endoscope
side insulating portion 42 which configures the endoscopeside connection portion 40. However, it may also be configured such that after the endoscopeside connection portion 40 is arranged in the secondconnection portion hole 32 d in the predetermined state, an adhesive having excellent fluidity is poured into the gap between the endoscopeside connection portion 40 and the secondconnection portion hole 32 d, so as to make the endoscopeside connection portion 40 stuck and fixed to the secondconnection portion hole 32 d. - Here, the assembling of the
distal end adapter 10 to thedistal end portion 3 a by the user is described with reference toFIG. 18 andFIG. 19 . - When assembling the
distal end adapter 10 to thedistal end portion 3 a, the user first performs positioning of thefemale screw portion 12 a formed in the end portion of thedetachable ring 12 and the firstmale screw portion 33 a formed in theexterior portion 31 so that the screw portions are screwed with each other. Then, the user rotates thedetachable ring 12 in a predetermined direction, so as to make thefemale screw portion 12 a screwed to the firstmale screw portion 33 a. Thereafter, in this screwed state, the user further rotates thedetachable ring 12 in the predetermined direction. Then, thefemale screw portion 12 a is moved beyond the firstmale screw portion 33 a, so that thefemale screw portion 12 a is arranged on the slidingportion 33 c so as to be moved back and forth in the axis direction. - Next, the user aligns the
positioning hole 11 d provided in the adaptermain body 11 with therotation stopping portion 34 provided in the distal end portionmain body 32. Then, the user performs a hand operation so as to reduce the relative distance between thedetachable ring 12 and the secondmale screw portion 33 b. Then, therotation stopping portion 34 is inserted in thepositioning hole 11 d. In this insertion arrangement state, the user performs a hand operation to further reduce the relative distance between thedetachable ring 12 and the secondmale screw portion 33 b. Then, thefemale screw portion 12 a formed in the end portion of thedetachable ring 12 is brought into contact with the secondmale screw portion 33 b formed in theexterior portion 31. - Here, the user rotates the
detachable ring 12 in the predetermined direction in order to make themale screw portion 33 b screwed into thefemale screw portion 12 a. Then, themale screw portion 33 b is screwed into thefemale screw portion 12 a according to the rotation of thedetachable ring 12. Subsequently, when the user continues to rotate thedetachable ring 12, the bottom surface of thepositioning hole 11 d is brought gradually closer to the distal end surface of therotation stopping portion 34. Then, thecontact portion 22 c of thesecond pin member 22 provided in the adaptermain body 11 is brought into contact with thecontact surface portion 41 a arranged on the distal end surface of the distal end portionmain body 32. - At this time, the user continues to rotate the
detachable ring 12, and hence thecontact portion 22 c is moved toward the distal end direction of thedistal end adapter 10 against the urging force of thecoil spring 24. On the other hand, the distal end portion of theexterior portion 31 is brought into contact with the 0ring 29, so that the amount of rotating force of thedetachable ring 12 is changed. Thereafter, when the user continues to rotate thedetachable ring 12, the bottom surface of therotation positioning hole 11 d is brought into contact with the distal end surface of therotation stopping portion 34. Thereby, as shown inFIG. 18 , the attachment of thedistal end adapter 10 to thedistal end portion 3 a is completed, so that anadapter type endoscope 50 is configured. - When the user turns on a power supply switch on the
operation panel 6, thecontrol portion 4 provided to the endoscope main body portion 2 can determine the type of the distal end adapter based on the resistance value of theresistor 7 and drive the power supply and the video processor under the optimal condition. - In the
adapter type endoscope 50 shown inFIG. 19 , thecontact portions 22 c of thesecond pin members 22 configuring the pair ofelectrical connection members 26 of the adapterside connection portion 20, is arranged on thecontact surface portion 41 a of theterminal member 41 configuring the endoscopeside connection portion 40 so as to be urged by the urging force of the coil springs 24 configuring theelectrical connection member 26. Thereby, theLED 14 mounted on theLED holding plate 18 is electrically connected to the electrical cable extended from the power supply portion via aflexible substrate 43, theterminal member 41 configuring the endoscopeside connection portion 40, thesecond pin member 22 configuring the adapterside connection portion 20, thecase body 23, thecoil spring 24, thefirst pin member 21, theflexible substrate 19, theLED electrode 28. - Further, in the
adapter type endoscope 50, the distal end lens cover 35 a of the image-formingoptical system 35 provided in therotation stopping portion 34 which configures the distal end portionmain body 32, is configured to face the secondoptical lens 16 d which is one of the side viewoptical systems 16 provided in thedistal end adapter 10, in a predetermined positional relationship. That is, a side view observationoptical system 51 is configured in such a manner that the optical axis of the side viewoptical system 16 is made coincident with the optical axis of the image-formingoptical system 35, and that an optical image passing through theobservation window 16 a, theprism 16 b, the firstoptical lens 16 c, the secondoptical lens 16 d, the distal end lens cover 35 a, theoptical lens 35 b, theoptical lens 35 c, thelens cover 35 d, and thecover glass 35 e is formed on the image pickup surface of theimage pickup device 36 a. - Therefore, in the
adapter type endoscope 50, theLED 14 mounted on theLED holding plate 18 is brought into a light-emitting state by supplying electric power to theLED 14 via the electrical cable, so as to illuminate an observation site. On the other hand, the optical image of the observation site illuminated by theLED 14 is formed on the image pickup surface of theimage pickup device 36 a. - In this way, the
contact surface portion 41 a of theterminal member 41 provided in the endoscopeside connection portion 40 is configured to have a large diameter. Thereby, when thedistal end adapter 10 provided with the adapterside connection portion 20 is mounted to thedistal end portion 3 a provided with the endoscopeside connection portion 40, thecontact surface portion 41 a is surely brought into contact with thecontact portion 22 c of thesecond pin member 22 provided in the adapterside connection portion 20, so that an electrical connection state can be obtained. - Further, the
second pin member 22 provided in the adapterside connection portion 20 is urged in the projecting direction by thecoil spring 24 provided in the adapterside connection portion 20. Therefore, when thedistal end adapter 10 provided with the adapterside connection portion 20 is attached to thedistal end portion 3 a provided with the endoscopeside connection portion 40, the electrical connection state can be obtained in such a way that thecontact portion 22 c of thesecond pin member 22 provided in the adapterside connection portion 20 is brought into contact with the contactsurface arrangement portion 41 a of theterminal member 41 in the urged state, that is, thecontact portion 22 c is pressed against the contactsurface arrangement portion 41 a by a predetermined pressing force. - Note that the present embodiment assumes that the side view type adapter is used as the
distal end adapter 10 of theadapter type endoscope 50. However, the distal end adapter is not limited to the side view type adapter provided with the side view optical system. The distal end adapter may be a direct view type adapter provided with the direct view optical system as the observation optical system as shown inFIGS. 20 to 24 , a direct view type adapter for stereoscopic observation (hereinafter referred to as stereo direct view type) as shown inFIGS. 25 to 28 , and a stereo direct view type adapter including a channel hole as shown inFIGS. 29 to 32 . - As shown in
FIGS. 20 to 24 , a direct view typedistal end adapter 10A attachable to thedistal end portion 3 a is configured by mainly including the adaptermain body 11A, thedetachable ring 12, and thehood portion 13A. Anillumination hole 61 and anoptical portion hole 62 are provided in thehood portion 13A. Theillumination hole 61 has a substantially cylindrical shape, and the plurality ofLEDs 14 are faced from the distal end surface of theillumination hole 61. Anobservation window 71, and the like, which configures a direct viewoptical system 70 is arranged in theoptical portion hole 62. - As shown in
FIG. 20 ,FIG. 21 , andFIG. 23 , in the direct view typedistal end adapter 10A, theLEDs 14 are arranged in an opposing positional relationship so as to sandwich theobservation window 71. Further, the pair ofLED electrodes 28 are arranged on the side of one of theLEDs 14, which is positioned on the lower side in the figure. TheLEDs 14 and theLED electrodes 28 are provided on thesubstrate 9 fixed to theLED holding plate 18A. TheLED holding plate 18A is arranged integrally on the distal end surface of the adaptermain body 11A. Apattern 9 b is formed beforehand on thesubstrate 9. The pair ofLEDs 14 and the pair ofLED electrodes 28 are provided at predetermined positions of thepattern 9 b. Thecontact portion 14 a of theLED 14 and thehead portion 28 a of theLED electrode 28, which are provided on thesubstrate 9, are electrically connected to each other by thewiring member 8. Further, thepattern 9 b and thecontact portion 14 a of theLED 14 are electrically connected to each other by thewiring member 8. - Also in the direct view type
distal end adapter 10A, as shown inFIG. 22 andFIG. 24 , the interval between the pair ofLED electrodes 28 is different from the interval of the pair offirst pin members 21 of the adapterside connection portion 20. For this reason, the electrical connection between theLED electrode 28 and thefirst pin member 21 is effected, for example, by a substantially fan-shapedrigid substrate 63, for the purpose of pitch adjustment. The fan-shapedsubstrate 63 includes, on the inner circular arc side, first contact pins 64 corresponding to thefirst pin members 21, and includes, on the outer circular arc side, second contact pins 65 corresponding to theLED electrodes 28. That is, also in the fan-shapedsubstrate 63, the pair offirst pin members 21 are electrically connected similarly to theflexible substrate 19. The interval between the first contact pins 64 is configured to be smaller than the interval between the second contact pins 65 to which thepin portions 28 b are electrically connected. - Further, a
resistor 7A for determining the type of the distal end adapter is mounted also on the fan-shapedsubstrate 63. The resistance value of theresistor 7A is different from the resistance value of theresistor 7. The adaptermain body 11A includes a cutout 11Aa. The cutout 11Aa is formed so that the worker can visually recognize theresistor 7A mounted on the fan-shapedsubstrate 63. - Note that the
reference character 73 denotes adhesive. The reference character 18Aa denotes a cutout included in theLED holding plate 18A. In addition, thereference character 74 is a fastening screw with which thehood portion 13A and the adaptermain body 11A are integrally fastened. - According to this configuration, the worker can visually recognize the
resistor 7A through the cutouts 18Aa and 11Aa. Electric elements may be mounted on the fan-shapedsubstrate 63. - The fan-shaped substrate is thus provided to the direct view type distal end adapter, and on the fan-shaped substrate is mounted a resistor, a resistance value of which is different from that of the resistor included in the side view type distal end adapter, thereby facilitating the determination of the distal end adapter. In addition, similarly as in the case of the above-described side view type, the configuration of the direct view type adapter makes it possible to prevent accidental contact of the resistor mounted on the fan-shaped substrate with other electronic components and bad electrical contact of the resistor, and also makes it possible for the worker to visually recognize the resistance value of the resistor at the time of assembly work for integrally fixing the adapter main body to the hood portion.
- Configuration and working of a stereo direct view type distal end adapter are described with reference to
FIGS. 25 to 28 . - When a stereo direct view type
distal end adapter 10B of the present embodiment is configured, theLED electrodes 28 and the pair offirst pin members 21 of the adapterside connection portion 20 are connected by aflexible substrate 19B similarly as in the side view type distal end adapter. - Here, brief description is made on the configuration of the stereo direct view type
distal end adapter 10B which is attachable to thedistal end portion 3 a. - The
distal end adapter 10B is configured by mainly including an adaptermain body 11B, thedetachable ring 12, and ahood portion 13B. Thehood portion 13 B is provided with theillumination hole 61 and theoptical portion hole 62 which are similar to those provided to thehood portion 13A. A plurality ofLEDs 14 face theillumination hole 61, and anobservation window 71B and the like, which configure a stereo direct viewoptical system 70B by including a pupiloptical system 75, are arranged in theoptical portion hole 62. - Also in the
distal end adapter 10B, theLEDs 14 are arranged in an opposing positional relationship so as to sandwich theobservation window 71B. A pair ofLED electrodes 28 are arranged on the side of one of theLEDs 14, which is positioned on the lower side inFIG. 25 . - The
LED electrodes 28 and the pair offirst pin members 21 of the adapterside connection portion 20 are electrically connected by theflexible substrate 19B. On theflexible substrate 19B is mounted aresistor 7B for determining the type of the distal end adapter. The resistance value of theresistor 7B is different from the resistance values of theresistors - The
reference character 76 denotes a pupil optical lens frame which also serves as the LED holding plate. Other configurations are the same as those of thedistal end adapter 10A. The same components are attached with the same reference characters and the descriptions thereof will be omitted. - The
resistor 7B, the resistance value of which is different from those of theresistors flexible substrate 19B, thereby enabling the same working and effect as those of the above-describeddistal end adapters - Note that the distal end adapter is assumed to be the stereo direct view type in the present embodiment. However, the distal end adapter is not limited to the stereo direct view type, and the present configuration may be adopted in the stereo side view type distal end adapter.
- In addition, as shown by the dashed lines in
FIG. 25 , theresistor 7B may be mounted on theflexible substrate 19B so as to be positioned not on the side of thehood portion 13B but on the side of the stereo direct viewoptical system 70B. This configuration enables the worker to visually recognize the resistance value of theresistor 7B from a gap between theflexible substrate 19B and the pupiloptical lens frame 76. - Furthermore, the present embodiment assumes that the
resistor 7B is mounted on theflexible substrate 19B which electrically connects theLED electrodes 28 and thefirst pin members 21. However, as shown by the two-dot chain lines or the dashed lines inFIG. 28 , theresistor 7B may be mounted on aflexible substrate 19C, for example, which is a member different from theflexible substrate 19B, and theflexible substrate 19C on which theresistor 7B is mounted may be connected to theLED electrodes 28 b or to thefirst pin members 21 as shown in the drawing. Alternatively, theflexible substrate 19C may be connected to thesubstrate 9, though the illustration thereof is omitted. - Configuration and working of the stereo direct view type distal end adapter including a channel hole are described with reference to
FIGS. 29 to 32 . - If the
distal end adapter 10C is the stereo direct view type including a channel hole, atubular member 81 configuring achannel hole 80 is arranged in an adaptermain body 11C, as shown inFIGS. 29 and 30 . Therefore, unlike in the case of theadapter 10 and the like, it is difficult to provide the D-shape space 10S1 or the distal end side space 10S2 in thedistal end adapter 10C of the present embodiment. - Here, brief description is made on the configuration of the stereo direct view type
distal end adapter 10C which is attachable to thedistal end portion 3 a. - The
distal end adapter 10C is configured by mainly including the adaptermain body 11C, thedetachable ring 12, and ahood portion 13C. As shown inFIGS. 30 and 31 , thehood portion 13C is provided with a tubularmember arranging hole 82 in addition to theillumination hole 61 and theoptical portion hole 62 which are substantially the same as those provided to the above-describedhood portion 13B. - In the tubular
member arranging hole 82 is provided thetubular member 81 for configuring thechannel hole 80. In addition, a plurality ofLEDs 14 face theillumination hole 61 and anobservation window 71B and the like, which configure the stereo direct viewoptical system 70B by including the pupiloptical system 75, are arranged in theoptical portion hole 62. Thereference character 83 denotes a hood portion covering member which is provided on an outer periphery of thehood portion 13B. - In the
distal end adapter 10C, the plurality ofLEDs 14 are arranged in an opposing positional relationship so as to sandwich theobservation window 71B and an opening 80 o of thechannel hole 80 as shown inFIG. 29 , and an adapterside connection portion 84 is arranged as shown inFIG. 32 . In the present embodiment, an end portion of anelectrical cable 85 electrically connected to the adapterside connection portion 84 and extended therefrom is electrically connected to theLED electrodes 28C respectively provided so as to sandwich theobservation window 71B and the channel hole 77, as shown inFIG. 31 . - As shown by the dashed lines in
FIG. 30 , acutout hole 76 c is formed on the distal end side of the pupiloptical lens frame 76. Thecutout hole 76 c is formed in a shape having openings on the distal end side and on the outer peripheral side, and is a space for arranging theresistor 7C for determining the type of the distal end adapter. Theresistor 7C is mounted on a surface of thesubstrate 9, which is opposite side of the surface on which theLEDs 14 are mounted. The resistance value of theresistor 7C is different from the resistance values of the above-describedresistors - Other configurations are the same as those of the
distal end adapter 10B. The same components are attached with the same reference characters, and the descriptions thereof will be omitted. - The
resistor 7C, the resistance value of which is different from those of theresistors substrate 9, thereby facilitating the determination of the distal end adapter same as in the cases of thedistal end adapters - In addition, the space for arranging the
resistor 7C is formed as the cutout hole formed in the shape having openings on the distal end side and the outer peripheral side, thereby enabling the worker to visually recognize the resistor positioned in the space from the opening on the outer peripheral side. - Note that the present embodiment assumes that the distal end adapter is the stereo direct view type including a channel hole. However, the distal end adapter is not limited to the stereo direct view type including a channel hole, and the present configuration may be adopted in the stereo side view type distal end adapter including a channel hole. Alternatively, the present configuration may be adopted in distal end adapters in which it is difficult to provide the D-shape space 10S1 and the distal end side space 10S2.
- Furthermore, as shown in
FIG. 33 , if there is a space on thesubstrate 9 on which the plurality ofLEDs 14 are arranged around theobservation window 71, anadapter 10D may be configured by mounting aresistor 7D, the resistance value of which is different from those of theresistors 7 to 7C in the space on the mounting surface side of thesubstrate 9. This enables the same working and the effect as those of thedistal end adapter 10C to be obtained. Thereference character 13D denotes a hood portion. - Having described the preferred embodiments of the invention referring to the accompanying drawings, it should be understood that the present invention is not limited to those precise embodiments and various changes and modifications thereof could be made by one skilled in the art without departing from the spirit or scope of the invention as defined in the appended claims.
Claims (6)
1. (canceled)
2. An endoscope adapter including a light emitting diode, to be connected to an insertion portion of an endoscope in which the insertion portion includes an image-forming optical system and an endoscope side electrical connection portion inside a distal end portion thereof, the endoscope side electrical connection portion being connected to a power cable extending from a power supply portion, the endoscope adapter comprising:
an adapter side detachable portion to be attached to an adapter attaching portion provided at the distal end portion of the insertion portion of the endoscope;
an adapter side electrical connection portion having a plurality of contact pins which are brought into contact with the endoscope side electrical connection portion when the endoscope adapter is connected to the insertion portion of the endoscope;
a side view optical system for observation in a side view direction by bending an optical axis of the image-forming optical system inside the distal end portion of the insertion portion so as to extend in a direction perpendicular to a longitudinal direction of the insertion portion of the endoscope;
an adapter main body that has a holding region for holding the light emitting diode provided to be distal with respect to an observation window of the side view optical system, an arrangement space in which the adapter side electrical connection portion is arranged, and a space provided at an opposite side to the holding region for holding the light emitting diode and configured to arrange a wide and flat substrate which electrically connects between the adapter side electrical connection portion and the light emitting diode;
a determination resistor arranged in the adapter main body on a distal end side of the adapter main body and configured to determine a type of the endoscope adapter; and
a main body exterior member to which the adapter main body is internally fitted and which has an opening formed at a region corresponding to the holding region of the adapter main body.
3. The endoscope adapter according to claim 2 , wherein the adapter side electrical connection portion comprises:
springs which are conductive members and configured to urge the contact pins towards the distal end portion of the insertion portion of the endoscope;
case bodies which are conductive members each having a pipe shape and in which the springs and the contact pins are arranged to be slidable; and
an insulating portion configured to integrally cover the case bodies in a state where the case bodies are arranged in parallel with and insulated from each other.
4. The endoscope adapter according to claim 3 , wherein the side view optical system comprises a prism and the adapter main body has a support portion for arranging the prism.
5. The endoscope adapter according to claim 4 , wherein an electric connection path from the wide and flat substrate to the light emitting diode is laid out so as to pass on the distal end side of the adapter main body from the space provided in the adapter main body towards the light emitting diode.
6. The endoscope adapter according to claim 5 , wherein the determination resistor is provided on the wide and flat substrate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/661,450 US20130184531A1 (en) | 2009-01-23 | 2012-10-26 | Endoscope adapter including light emitting diode, and adapter type endoscope |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US12/358,493 US8314835B2 (en) | 2009-01-23 | 2009-01-23 | Endoscope adapter including light emitting diode, and adapter type endoscope |
US13/661,450 US20130184531A1 (en) | 2009-01-23 | 2012-10-26 | Endoscope adapter including light emitting diode, and adapter type endoscope |
Related Parent Applications (1)
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US12/358,493 Continuation US8314835B2 (en) | 2009-01-23 | 2009-01-23 | Endoscope adapter including light emitting diode, and adapter type endoscope |
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US20130184531A1 true US20130184531A1 (en) | 2013-07-18 |
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US12/358,493 Active 2030-08-03 US8314835B2 (en) | 2009-01-23 | 2009-01-23 | Endoscope adapter including light emitting diode, and adapter type endoscope |
US13/661,450 Abandoned US20130184531A1 (en) | 2009-01-23 | 2012-10-26 | Endoscope adapter including light emitting diode, and adapter type endoscope |
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US12/358,493 Active 2030-08-03 US8314835B2 (en) | 2009-01-23 | 2009-01-23 | Endoscope adapter including light emitting diode, and adapter type endoscope |
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US20100188493A1 (en) | 2010-07-29 |
US8314835B2 (en) | 2012-11-20 |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |