CN102872505A - Spring-type security injector - Google Patents
Spring-type security injector Download PDFInfo
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- CN102872505A CN102872505A CN2011101965107A CN201110196510A CN102872505A CN 102872505 A CN102872505 A CN 102872505A CN 2011101965107 A CN2011101965107 A CN 2011101965107A CN 201110196510 A CN201110196510 A CN 201110196510A CN 102872505 A CN102872505 A CN 102872505A
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- spring
- core bar
- pumpback
- terminal
- diameter
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Abstract
The invention discloses a spring-type security injector. The spring-type security injector is characterized in that a limiting fastener is sleeved on an inner needle base; the limiting fastener is arranged in a barrel neck; an inner cavity of a core rod is hollow; an elastic element is arranged inside the inner cavity of the core rod; the upper end of the elastic element is connected with a pumpback terminal; the pumpback terminal is arranged in an opening at the upper end of the inner cavity of the core rod; the lower part of the pumpback terminal is arranged inside the inner cavity of the core rod; the upper part of the pumpback terminal is protruded out of the opening at the upper end of the core rod; and the part of the core rod, near the lower end part, is connected with the lower end of the elastic element. As a spring-type automatic pumping structure is adopted, the product is clever in concept, and accurate to locate; each component realizes full-automatic rear assembly, so that full-automatic assembly is realized; a single component is convenient for mould opening; a three-section spring design is convenient to assembly and spring location; the product is convenient and fast to operate; the operation is smooth in hand feel; single-handle operation can be achieved; and the work state of the injector is stable. Compared with the prior art, the spring-type security injector has the outstanding substantive characteristic and obvious progress.
Description
Technical field
The present invention relates to the technical field of medical apparatus and instruments, specifically a kind of spring type safety syringe, particularly its mechanical connecting structure.
Background technology
Documents, number of patent application: 201010604640.5, notification number: CN102068740A, the applying date: 2010.12.24, the patentee: Suyun Medical Equipment Co., Ltd., Jiangsu, this case discloses a kind of " automatic contractile safety syringe ", comprises overcoat and is located at the interior core bar of overcoat, the overcoat front portion is connected with needle assembly, and needle assembly is provided with sheath; It is characterized in that: needle assembly comprises the outer seat of needle tubing, needle tubing seat and needle tubing, and the needle tubing seat is located on the needle tubing, and the rear end of needle tubing seat is provided with the engaging circular cone, and the outer cover for seat of needle tubing is located on the needle tubing seat, and the outer base rear end section of needle tubing is provided with nipple; Described overcoat front end is provided with the outer cone locked joints that is connected with nipple, puts outward and also is connected with at least two elastic damping pawls that stretch out forward overcoat; Described core bar is the hollow core bar that is provided with inner chamber, the front portion of core bar is provided with the thromboembolism that stretches out forward inner chamber, the core bar front end is provided with the plug that connects core bar and thromboembolism, the thromboembolism rear end is provided with the slip ring that cooperates with the core bar inwall, the core bar inwall of slip ring rear side is provided with the bulge loop that stops slip ring, the thromboembolism that is in the inner chamber is provided with Compress Spring, and described thromboembolism front end is provided with and the engaging cavity that engages circular cone and match.
From above-mentioned documents, be not difficult to find out, existing safety injector complicated structure, required parts are more, and assembly process is more complicated also, but also it is malfunctioning operation easily to occur, duty is also unstable, and can't realize one-handed performance.
Summary of the invention
The object of the present invention is to provide a kind of spring type safety syringe, it adopts the built-in spring structure of core bar, can realize the automatic pumpback function of interior needle stand, and whole operating process one-hand operation is finished, and has overcome the shortcoming and defect that exists in the prior art.
To achieve these goals, technical scheme of the present invention is: a kind of spring type safety syringe, it mainly comprises cylindrical shell, be provided with interior needle stand in the cylinder neck of cylindrical shell, be provided with core bar in the cylindrical shell, the core bar place is socketed with plug, it is characterized in that: described interior needle stand place is socketed with the limiting card component, and the limiting card component is positioned at a neck, described core bar inner chamber hollow, intracavity is provided with elastic component in the core bar, the upper end of elastic component is connected with the pumpback terminal, and the pumpback terminal is positioned at the upper end open place of core bar inner chamber, and it is inner that pumpback terminal bottom is positioned at the core bar inner chamber, the pumpback terminal upper portion protrudes from the core bar upper end open, and the lower end of elastic component is connected near lower end with core bar.
The invention discloses a kind of spring type safety syringe, it adopts the automatic pumpback structure of needle stand in the spring, and product conception is ingenious, accurate positioning, each parts can be realized the assembling of full-automatic rear portion, full-automatic assembling, the single component die sinking is convenient, the syllogic spring design is convenient to assembling and spring location, and product operation is convenient, and operating handle is smooth, can realize one-handed performance, the syringe stable working state compared to existing technologies, has outstanding substantive distinguishing features and marked improvement.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is general assembly drawing of the present invention.
Fig. 3 is tube structure schematic diagram of the present invention.
Fig. 4 is Fig. 3 partial enlarged drawing.
Fig. 5 is core bar structure schematic diagram of the present invention.
Fig. 6 is Fig. 5 partial enlarged drawing.
Fig. 7 is needle stand structure schematic diagram in the present invention.
Fig. 8 is round section joint ring structural representation of the present invention.
Fig. 9 is plug structural representation of the present invention.
Figure 10 is limiting card component structural representation of the present invention.
Figure 11 is Figure 10 top view.
Figure 12 is pumpback terminal structure schematic diagram of the present invention.
Figure 13 is that core bar lid of the present invention emits structural representation.
Figure 14 is elastic component structural representation of the present invention.
Figure 15 is jacket structure schematic diagram of the present invention.
Figure 16 is limiting card component initial condition structural representation of the present invention.
Figure 17 is core bar initial condition structural representation of the present invention.
Figure 18 is initial condition structural representation of the present invention.
Figure 19 is Figure 18 partial enlarged drawing.
Figure 20 is phase I user mode structural representation of the present invention.
Figure 21 is Figure 20 partial enlarged drawing.
Figure 22 is second stage user mode structural representation of the present invention.
Figure 23 is Figure 22 partial enlarged drawing.
Figure 24 is safe condition structural representation of the present invention.
Figure 25 is Figure 24 partial enlarged drawing.
Figure 26 is elastic component user mode structural representation of the present invention.
The specific embodiment
With reference to the accompanying drawings, the present invention further is described.
The present invention is a kind of spring type safety syringe, as shown in FIG., it mainly comprises cylindrical shell 1, be provided with interior needle stand 2 in the cylinder neck 4 of cylindrical shell 1, interior needle stand 2 places are equipped with needle tubing 31, cylindrical shell 1 end is socketed with sheath 32, be provided with core bar 5 in the cylindrical shell 1, core bar 5 places are socketed with plug 6, and it is different from prior art and is: described interior needle stand 2 places are socketed with limiting card component 7, limiting card component 7 is positioned at a neck 4, described core bar 5 inner chamber hollows, core bar 5 interior intracavity are provided with elastic component 8, and the upper end of elastic component 8 is connected with pumpback terminal 9, pumpback terminal 9 is positioned at the upper end open place of core bar 5 inner chambers, it is inner that pumpback terminal 9 bottoms are positioned at core bar 5 inner chambers, and pumpback terminal 9 tops protrude from core bar 5 upper end open, and the lower end of elastic component 8 is connected near lower end with core bar 5, after the syringe assembling was finished, elastic component was in extended state.
In the specific implementation, described interior needle stand 2 places are socketed with round section joint ring 3, and round section joint ring 3 is between interior needle stand 2 and cylinder neck 4, and round section joint ring 3 can be guaranteed the sealing between interior needle stand and the cylindrical shell, prevents leakage.
In the specific implementation, described limiting card component 7 is body circlewise, limiting card component 7 places form symmetrical infolding fin 10, the junction horizontal level of infolding fin 10 lower ends and limiting card component 7 is lower than limiting card component 7 top edges, the top of infolding fin 10 tilts to limiting card component 7 centre bits, form gap 11 between infolding fin 10 both sides and the limiting card component 7, infolding fin 10 upper and lower surfaces are arc surfaced, and infolding fin 10 tops form an arcuation plane 12, and the limiting card component that the formation of limiting card component 7 outer wall places matches with cylinder neck 4 inwalls is convex tendon 24 fixedly.
In the specific implementation, described interior needle stand 2 is column, its outer wall place forms the interior needle stand upper limit step 13 that matches with cylinder neck 4 inside, the interior needle stand outer wall place of interior needle stand upper limit step 13 bottoms forms interior needle stand lower limit step 33, two engaging elastic fins 14 that distribute are symmetrically formed at interior needle stand 2 bottoms, engaging elastic fin 14 forms engaging chimb 15 near place, medial wall, lower end, and place, engaging inside edge, elastic fin 14 lower end forms bevel edge 16.
In the specific implementation, described pumpback terminal 9 is column, its end is provided with conical head 17, conical head 17 lower edge places form the reverse engaging step 18 that matches with two engaging elastic fins 14, pumpback terminal 9 outer walls form the pumpback terminal position convex tendon 19 that matches with cavity wall in the core bar, and pumpback terminal 9 outer walls form elastic component engaging step 20(near lower end and are used for fixedly elastic component upper end).
In the specific implementation, described core bar 5 inner chambers are hollow form, core bar 5 inner chambers form the pumpback terminal ring-type location depression 25 that matches with pumpback terminal position convex tendon 19 near the place, top, core bar 5 inner chambers are provided with reverse elasticity spare assembling step 26(near the place, bottom and are used for fixedly elastic component lower end), reverse elasticity spare assembling step 26 places are provided with the core bar lid and emit 27, and the core bar top outer edge forms ring-type bevel edge 34(and is convenient to swimmingly two infolding fins be backed down laterally).
In the specific implementation, described elastic component 8 is the syllogic spring, its hypomere spring 21 diameters are greater than stage casing spring 22 diameters, its stage casing spring 22 diameters are greater than epimere spring 23 diameters, hypomere spring 21 is 1-30 circles, stage casing spring 22 is 10-300 circles, epimere spring 23 is 1-30 circles, the diameter of epimere spring 23 is less than the diameter at elastic component engaging step 20 places, the diameter of epimere spring 23 is greater than elastic component engaging step 20 top pumpback terminals 9 outer diameters, the diameter of stage casing spring 22 is greater than the diameter at elastic component engaging step 20 places, hypomere spring 21 diameters are greater than the core bar inner chamber internal diameter on reverse elasticity spare assembling step 26 tops, the steel wire diameter of described syllogic spring is 0.1mm-2 mm, and the gap between steel wire and the steel wire is 0.1mm-2 mm.
In the specific implementation, the cylinder neck 4 interior cavity wall places of described cylindrical shell 1 form round section joint ring retaining convex rib 30, the interior diameter of round section joint ring retaining convex rib 30 is less than its top cylinder neck 4 inner chamber internal diameters, round section joint ring retaining convex rib 30 bottom cylinder necks 4 interior cavity wall places form and the fixing limiting card component ring-type fixed swage 28 that matches of convex tendon 24 of the limiting card component of limiting card component 7, cylindrical shell 1 lower openings place forms core bar protecting pipe 29, and core bar protecting pipe 29 is structure as a whole with cylindrical shell 1.
In the specific implementation, described conical head 17 places oppositely engage the major diameter on step 18 tops greater than the spacings between two engaging elastic fin 14 places engaging chimbs 15.
In the specific implementation, as shown in 18, this moment, syringe was initial condition, the core bar end is assembled with the pumpback terminal, one end of elastic component (syllogic spring) is fixed in the elastic component engaging step place at pumpback terminal rear portion, the other end of elastic component (syllogic spring) is fixed in the reverse elasticity spare assembling step place of core bar rear end, elastic component (syllogic spring) stage casing is in the state of drawing high, during start injection, slowly promote forward core bar, the thereupon forward displacement of the pumpback terminal of core bar end, when the conical head at pumpback terminal top touches two engagings elastic fin lower end, interior needle stand bottom, conical head will engage elastic fin and back down to both sides, enter smoothly two gaps between the engaging elastic fin, after conical head skims over engaging chimb position, active force disappears, two engaging elastic fins reset to the inside, at this moment, promote forward again core bar, because interior needle stand bottom has been pushed up in the end of conical head, therefore can't push ahead again, at this moment, the biting point of cavity wall breaks away from pumpback terminal and the core bar, meanwhile, the circular opening of core bar upper end is backed down two infolding fins of limiting card component laterally, so that infolding fin top and interior needle stand lower limit step break away from, at this moment, the support force moment complete obiteration that interior needle stand makes progress, and the engaging elastic fin of the conical head of pumpback terminal ends and interior needle stand bottom engages fully, and take out terminal end also with core bar in cavity wall break away from, therefore under the effect of elastic component (syllogic spring) restoring force, whole interior needle stand moment is pulled back into the core bar inner chamber, realizes the safety operation of syringe.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that implementation of the present invention is confined to above-mentioned these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. spring type safety syringe, it mainly comprises cylindrical shell (1), be provided with interior needle stand (2) in the cylinder neck (4) of cylindrical shell (1), be provided with core bar (5) in the cylindrical shell (1), core bar (5) locates to be socketed with plug (6), it is characterized in that: described interior needle stand (2) locates to be socketed with limiting card component (7), limiting card component (7) is positioned at a neck (4), described core bar (5) inner chamber hollow, the interior intracavity of core bar (5) is provided with elastic component (8), the upper end of elastic component (8) is connected with pumpback terminal (9), pumpback terminal (9) is positioned at the upper end open place of core bar (5) inner chamber, it is inner that pumpback terminal (9) bottom is positioned at core bar (5) inner chamber, and pumpback terminal (9) top protrudes from core bar (5) upper end open, and the lower end of elastic component (8) is connected near lower end with core bar (5).
2. a kind of spring type safety syringe according to claim 1, it is characterized in that: described interior needle stand (2) locates to be socketed with round section joint ring (3), and round section joint ring (3) is positioned between needle stand (2) and the cylinder neck (4).
3. a kind of spring type safety syringe according to claim 1, it is characterized in that: described limiting card component (7) is body circlewise, limiting card component (7) locates to form symmetrical infolding fin (10), the junction horizontal level of infolding fin (10) lower end and limiting card component (7) is lower than limiting card component (7) top edge, the top of infolding fin (10) tilts to limiting card component (7) centre bit, form gap (11) between infolding fin (10) both sides and the limiting card component (7), infolding fin (10) upper and lower surface is arc surfaced, and infolding fin (10) top forms an arcuation plane (12), and the limiting card component that the formation of limiting card component (7) outer wall place matches with cylinder neck (4) inwall is convex tendon (24) fixedly.
4. a kind of spring type safety syringe according to claim 1, it is characterized in that: described interior needle stand (2) is column, its outer wall place forms the interior needle stand upper limit step (13) that matches with cylinder neck (4) inside, the interior needle stand outer wall place of interior needle stand upper limit step (13) bottom forms interior needle stand lower limit step (33), two engaging elastic fins (14) that distribute are symmetrically formed at interior needle stand (2) bottom, engaging elastic fin (14) forms engaging chimb (15) near place, medial wall, lower end, and place, engaging elastic fin (14) inside edge, lower end forms bevel edge (16).
5. a kind of spring type safety syringe according to claim 1, it is characterized in that: described pumpback terminal (9) is column, its end is provided with conical head (17), conical head (17) lower edge place forms the reverse engaging step (18) that matches with two engaging elastic fins (14), pumpback terminal (9) outer wall forms the pumpback terminal position convex tendon (19) that matches with cavity wall in the core bar, and pumpback terminal (9) outer wall forms elastic component engaging step (20) near lower end.
6. a kind of spring type safety syringe according to claim 1, it is characterized in that: described core bar (5) inner chamber is hollow form, core bar (5) inner chamber forms the pumpback terminal ring-type location depression (25) that matches with pumpback terminal position convex tendon (19) near the place, top, core bar (5) inner chamber is provided with reverse elasticity spare assembling step (26) near the place, bottom, reverse elasticity spare assembling step (26) is located to be provided with the core bar lid and is emitted (27), and the core bar top outer edge forms ring-type bevel edge (34).
7. a kind of spring type safety syringe according to claim 1, it is characterized in that: described elastic component (8) is the syllogic spring, its hypomere spring (21) diameter is greater than stage casing spring (22) diameter, its stage casing spring (22) diameter is greater than epimere spring (23) diameter, hypomere spring (21) is 1-30 circles, stage casing spring (22) is 10-300 circles, epimere spring (23) is 1-30 circles, the diameter of epimere spring (23) engages the diameter that step (20) is located less than elastic component, the diameter of epimere spring (23) engages step (20) top pumpback terminal (9) outer diameter greater than elastic component, the diameter of stage casing spring (22) engages the diameter that step (20) is located greater than elastic component, hypomere spring (21) diameter is greater than the core bar inner chamber internal diameter on reverse elasticity spare assembling step (26) top, the steel wire diameter of described syllogic spring is 0.1mm-2 mm, and the gap between steel wire and the steel wire is 0.1mm-2 mm.
8. a kind of spring type safety syringe according to claim 1, it is characterized in that: the interior cavity wall of cylinder neck (4) place of described cylindrical shell (1) forms round section joint ring retaining convex rib (30), the interior diameter of round section joint ring retaining convex rib (30) is less than its top cylinder neck (4) inner chamber internal diameter, the interior cavity wall of round section joint ring retaining convex rib (30) bottom cylinder neck (4) place forms and the fixing limiting card component ring-type fixed swage (28) that matches of convex tendon (24) of the limiting card component of limiting card component (7), cylindrical shell (1) lower openings place forms core bar protecting pipe (29), and core bar protecting pipe (29) is structure as a whole with cylindrical shell (1).
9. a kind of spring type safety syringe according to claim 5 is characterized in that: the major diameter that described conical head (17) locates oppositely to engage step (18) top locates to engage spacing between the chimb (15) greater than two engaging elastic fins (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110196510.7A CN102872505B (en) | 2011-07-14 | 2011-07-14 | Spring-type security injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110196510.7A CN102872505B (en) | 2011-07-14 | 2011-07-14 | Spring-type security injector |
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| Publication Number | Publication Date |
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| CN102872505A true CN102872505A (en) | 2013-01-16 |
| CN102872505B CN102872505B (en) | 2015-04-01 |
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| CN201110196510.7A Active CN102872505B (en) | 2011-07-14 | 2011-07-14 | Spring-type security injector |
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| CN101934104A (en) * | 2009-06-29 | 2011-01-05 | 颜健民 | Automatic retraction syringe |
| CN202161639U (en) * | 2011-07-14 | 2012-03-14 | 沈挺 | Spring type safety syringe |
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| US4838869A (en) * | 1987-08-29 | 1989-06-13 | Allard Edward F | Retractable needle syringe |
| US4955870A (en) * | 1988-08-23 | 1990-09-11 | Ridderheim Kristen A | Hypodermic syringe with retractable needle |
| US5084029A (en) * | 1988-12-07 | 1992-01-28 | Nacci Carla | Syringe which automatically make the hypodermic needle harmless after use |
| WO1991003269A1 (en) * | 1989-08-28 | 1991-03-21 | Townsend Controls Pty. Ltd. | Safety syringe |
| US5222943A (en) * | 1991-03-18 | 1993-06-29 | Profarm S.P.A. | Selflocking syringe |
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| CN101195050A (en) * | 2006-12-06 | 2008-06-11 | 文代久 | Disposal medical automatic retraction safety syringe |
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| CN102872505B (en) | 2015-04-01 |
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