CN103418048B - Needleless joint - Google Patents
Needleless joint Download PDFInfo
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- CN103418048B CN103418048B CN201210163304.0A CN201210163304A CN103418048B CN 103418048 B CN103418048 B CN 103418048B CN 201210163304 A CN201210163304 A CN 201210163304A CN 103418048 B CN103418048 B CN 103418048B
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- plunger
- housing
- hole
- radial direction
- needleless joint
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Abstract
The invention discloses a kind of needleless joint, comprising: the housing with cavity, housing upper end is provided with liquid inlet duct, and housing sidewall is provided with through hole; Plunger, can move in housing hollow between primary importance and the second position; Plunger is provided with axially extending bore, and plunger sidewall is provided with the first radial direction through hole; Flexible member, comprises Plug Division, parcel and fixing ring portion; Plug Division is inserted in the axially extending bore of plunger; The cross section of parcel is in " U " shape, and parcel is made up of internal ring, outer shroud and base ring; Internal ring, outer shroud and base ring surround the annular groove of accommodating plunger base; Fixing ring portion and inner walls are tightly connected, and fixing ring portion is provided with the second radial direction through hole; Liquid outlet tube, is arranged on housing side, is communicated with the through hole of housing sidewall.Needleless joint produces the normal pressure promoted to liquid outlet tube by housing inner liquid medicine when closing, thus prevents medicinal liquid from refluxing.In addition, it changes the size of normal pressure by the size changing plunger and flexible member.
Description
Technical field
The present invention relates to the needleless joint that cooperation transfusion catheter and syringe clinically used, can prevent medicinal liquid backflow and blood back.
Background technology
At present, when needing to carry out infusing or injecting in infusion process prolonged and repeatedly, multiselect venous detaining needle or inlying catheter.These venous detaining needles or the usual connecting tee conduit of inlying catheter, threeway conduit is furnished with usually standard Luer (Luer) joint or calparine cap, to meet the clinical requirement of multiple transfusion.But above-mentioned medical apparatus and instruments is in Clinical practice, there is certain defect: the use of female Luer on tee T, need to carry out partly sterilised at every turn, and entry needle will be used to puncture, so just increase work load and operational risk to medical and nursing work; The use of calparine cap, then need medical personnel after adding injecting medical liquid, injects heparin or normal saline carries out tube sealing in calparine cap, and prevent blood coagulation from forming thrombosis, this brings burden to clinical manipulation equally.In addition, the application of calparine cap also likely causes a small amount of air to enter blood circulation, there is risk.
Meanwhile, above-mentioned two kinds of apparatuses all cannot solve after transfusion completes, and due to the negative pressure produced when drawing back entry needle or needleless joint, cause blood of human body to pass back into indwelling flexible pipe, blood coagulation blocks needle tubing, stop transfusion next time and the severe compromise that produces.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of needleless joint, and it is after completing transfusion, is produced prevent medicinal liquid to reflux the unidirectional normal pressure of even blood back by needleless joint itself.
The technical solution adopted in the present invention is: a kind of needleless joint, comprising: housing, and this housing has a cavity, and the upper end of housing is provided with liquid inlet duct, and the sidewall of housing is provided with through hole; Plunger, can move in housing hollow between a primary importance and a second position; This plunger is provided with axially extending bore, and the sidewall of plunger is provided with the first radial direction through hole; Flexible member, comprises Plug Division, parcel and fixing ring portion; Plug Division is inserted in the axially extending bore of plunger; The cross section of parcel is in " U " shape, and this parcel is made up of internal ring, outer shroud and base ring; The upper end of internal ring is connected with the bottom of Plug Division, and the upper end of outer shroud is connected with the bottom of fixing ring portion; This internal ring, outer shroud and base ring surround the annular groove of the bottom of an accommodating plunger; Fixing ring portion and inner walls are tightly connected, and fixing ring portion is provided with one second radial direction through hole, and this second radial direction through hole is communicated with the through hole of housing sidewall; Liquid outlet tube, is arranged on the side of housing, and is connected with the through hole of housing sidewall; When plunger is in described primary importance, plunger is closed and seal fluid inlet tube, and the entrance of the first radial direction through hole of plunger is blocked in the Plug Division of flexible member; When plunger is in the described second position, the Plug Division of flexible member moves to the below of the first radial direction through hole of plunger, and the liquid flowed into from liquid inlet duct to fix the second radial direction through hole influent outlet of ring portion by the axially extending bore of plunger, the first radial direction through hole of plunger and flexible member.
Above-mentioned needleless joint, wherein, plunger is truncated cone-shaped.
Above-mentioned needleless joint, wherein, plunger is made up of non-metallic rigid material.
Above-mentioned needleless joint, wherein, the material of plunger is ABS plastic or PP plastics, and the material of flexible member is silica gel or thermoplastic elastomer (TPE).
Above-mentioned needleless joint, wherein, the fixing ring portion of flexible member has an Embedded Division, and this Embedded Division is embedded in the through hole of housing sidewall, and the second radial direction through hole is arranged on this Embedded Division.
Above-mentioned needleless joint, wherein, the arrival end of liquid inlet duct and the port of export of liquid outlet tube are equipped with standard luer fittings.
Above-mentioned needleless joint, wherein, housing be provided with arm laterally inclinedly, arm is communicated with liquid outlet tube.
Advantage of the present invention is:
1. needleless joint of the present invention is when closing, space between the parcel of flexible member and plunger diminishes gradually, the volume of the flow path of the liquid in space diminishes, because the volume of flow path of the liquid changes, produce the normal pressure that promoted to liquid outlet tube by the liquid remained in needleless joint, thus prevent medicinal liquid to reflux even blood back.Therefore, needleless joint of the present invention transfusion complete screw out syringe, transfusion device etc. time, can avoid because of produce negative pressure cause medicinal liquid reflux even blood backflow to the phenomenon of veins indwelling catheter.The present invention adopts needle-free manipulation, has ensured the safety of medical personnel, has improve medical and nursing work efficiency, alleviated patient's misery; Further, this needleless joint by changing the size of plunger and flexible member, and can obtain different normal pressures;
2. plunger of the present invention and flexible member all can adopt (chemically-bonded) lubricant combined by chemical action, guarantee smooth and reliable operation, avoid owing to using the material such as silicone oil to cause as lubricant lubricant to be injected into phenomenon in the device in this needleless joint downstream and even patient simultaneously;
3. the flexible member of plunger of the present invention adopts silica gel or thermoplastic elastomer, is convenient to use together in conjunction with antibacterial material, and is suitable for the occasion applying MRI;
4. when needleless joint is in closed condition, be interference fit between plunger and flexible member, make end face there is no gap, convenient sterilizing; In addition, between flexible member and plunger, do not preserve the dead space of residual liquid, improve the safety of continuous transfusion.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of needleless joint according to an embodiment of the invention.
Fig. 2 is the cross-sectional schematic of needleless joint according to an embodiment of the invention, and wherein, plunger is in primary importance.
Fig. 3 is the cross-sectional schematic of needleless joint according to an embodiment of the invention, and wherein, plunger is in the second position.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to figs. 1 to Fig. 3.Needleless joint of the present invention comprises housing 1, plunger 2, flexible member 3 and liquid outlet tube 4.
Housing 1 has a cavity 10, and the upper end of housing 1 is provided with liquid inlet duct 11, and the sidewall of housing 1 is provided with through hole 12.Liquid outlet tube 4 is arranged on the side of housing 1, and is connected with the through hole 12 of housing sidewall.It is preferred that housing 1 is integrally formed with liquid outlet tube 4.The arrival end of liquid inlet duct 11 and the port of export of liquid outlet tube 4 are equipped with standard luer fittings.
Plunger 2 can move in housing hollow 10 between a primary importance and a second position.Plunger 2 is provided with axially extending bore 21, and the sidewall of plunger is provided with the first radial direction through hole 22.Preferably, plunger is made up of non-metallic rigid material, as ABS plastic or PP plastics.
Flexible member 3 can provide the Flexible Reset power of deflection primary importance to plunger 2.In the present invention, flexible member 3 can be manufactured by chemically inert elastomeric material (chemically-inert elastomers).Preferably, the material of flexible member 3 is silica gel or thermoplastic elastomer (TPE) (TPE).This flexible member 3 comprises Plug Division 31, parcel 32 and fixing ring portion 33.Plug Division 31 is inserted in the axially extending bore 21 of plunger 2.The cross section of parcel 32 is in " U " shape, and this parcel 32 is made up of internal ring 321, outer shroud 322 and the base ring between internal ring 321 and outer shroud 322 323.The upper end of internal ring 321 is connected with the bottom of Plug Division 31, and the upper end of outer shroud 322 is connected with the bottom of fixing ring portion 33.Internal ring 321, outer shroud 322 and base ring 323 surround the annular groove of the bottom of an accommodating plunger 2.Fixing ring portion 33 is connected with the inner wall sealing of housing 1 by the mode of such as heat seal, the inner chamber 102 cavity 10 of housing being separated into the exocoel 101 opened to liquid inlet duct 11 and closing liquid inlet duct 11.Fixing ring portion 33 is provided with one second radial direction through hole 332, and this second radial direction through hole 322 is communicated with the through hole 12 of housing sidewall.Shown in the figure go out embodiment in, the fixing ring portion 33 of flexible member has an Embedded Division 331, and Embedded Division 331 is embedded in the through hole 12 of housing sidewall, and the second radial direction through hole 332 is arranged on this Embedded Division 331.In another embodiment, fixing ring portion 33 does not arrange the part be embedded in housing sidewall through hole 12, and the second radial direction through hole 332 of fixing ring portion 33 is corresponding with the through hole 12 of housing sidewall to be communicated with.
As shown in Figure 2, when plunger 2 is in primary importance, the Plug Division 31 of flexible member 3 and the axially extending bore of plunger 2 are sealed and matched, and, the end face of Plug Division 31 and the end face of plunger 2 are in same level, the entrance of the first radial direction through hole 22 of plunger is blocked in Plug Division 31, achieves plunger 2 and closes and seal fluid inlet tube 11.
When the end face of plunger 2 is pushed by the external infusion device of such as external female Luer and so on, plunger 2 moves down, and drives the parcel 32 of flexible member 3 to stretch downwards, and Plug Division 31 moves down, thus makes to produce space 23 between plunger 2 and parcel 32.When plunger 2 moves to the second position, as shown in Figure 3, the Plug Division 31 of flexible member moves to the below of the first radial direction through hole 22 of plunger, the second radial direction through hole 332 that first radial direction through hole 22 of plunger and flexible member fix ring portion aligns, the second radial direction through hole 332 influent outlet 4 of ring portion to be fixed by the medicinal liquid flowed into from liquid inlet duct 11 by the axially extending bore 21 of plunger, the first radial direction through hole 22 of plunger and flexible member, then flow into from liquid outlet tube 4 in other conduit of inlying catheter be connected, complete the process of clinical transfusion.
In a preferred embodiment, plunger 2 is Rotary-table, thus when plunger 2 moves down, more easily drives parcel 32 extensional deformation.The lateral wall of plunger base is provided with annular projection 24, is beneficial to produce space 23 between plunger 2 and parcel 32.The bottom surface of plunger 2 is convex arc surface.In addition, in order to avoid when plunger 2 moves down at the pressure that inner chamber 102 inner accumulated of housing is excessive, preferably, the diapire of housing 1 arranges a passage 13.
After external female Luer is screwed out, flexible member 3 reinstatement, drives plunger 2 to move to primary importance.Now, space 23 between the parcel 32 of flexible member and rigidity plunger 2 diminishes gradually, the volume of the flow path of the liquid in space 23 diminishes, because the volume of flow path of the liquid changes, produce the normal pressure that promoted to liquid outlet tube 4 by the liquid remained in needleless joint, make the medicinal liquid remained continue through the first radial direction through hole 22 of plunger and flexible member is fixed in the second radial direction through hole 332 influent outlet 4 of ring portion.That is, make the residual liquor in needleless joint, continue flowing along former flow direction, thus avoid the medicinal liquid of medicinal liquid caused by the negative pressure that produces when screwing out external female Luer and to reflux even blood backflow.
For meeting the demand of multiple-medicinal-liquid of carrying simultaneously, in Fig. 1 to embodiment illustrated in fig. 3, housing 1 be provided with arm 5 laterally inclinedly, arm 5 is communicated with liquid outlet tube 4.Illustrate only an arm in figure, also according to the requirement of transfusion, multiple arm can be set in the side of housing 1.Arm can with housing and liquid outlet tube integrally formed.
The description of the present embodiment combines specific embodiment, but it should be understood by one skilled in the art that the present invention is not limited to embodiment described here, and can carry out various modifications and variations and not deviate from the spirit and scope of the present invention.
Claims (10)
1. a needleless joint, is characterized in that, comprising:
Housing, this housing has a cavity, and the upper end of housing is provided with liquid inlet duct, and the sidewall of housing is provided with through hole;
Plunger, can move in housing hollow between a primary importance and a second position; This plunger is provided with axially extending bore, and the sidewall of plunger is provided with the first radial direction through hole;
Flexible member, comprises Plug Division, parcel and fixing ring portion; Described Plug Division is inserted in the axially extending bore of described plunger; The cross section of described parcel is in " U " shape, and this parcel is made up of internal ring, outer shroud and base ring; The upper end of described internal ring is connected with the bottom of Plug Division, and the upper end of described outer shroud is connected with the bottom of described fixing ring portion; This internal ring, outer shroud and base ring surround the annular groove of the bottom of an accommodating described plunger; Described fixing ring portion and inner walls are tightly connected, and fixing ring portion is provided with one second radial direction through hole, and this second radial direction through hole is communicated with the through hole of housing sidewall;
Liquid outlet tube, is arranged on the side of described housing, and is connected with the through hole of housing sidewall;
When described plunger is in described primary importance, plunger is closed and seal fluid inlet tube, and the entrance of the first radial direction through hole of plunger is blocked in the Plug Division of flexible member;
When described plunger is in the described second position, the Plug Division of flexible member moves to the below of the first radial direction through hole of plunger, from liquid inlet duct flow into liquid by the axially extending bore of plunger, the first radial direction through hole of plunger and flexible member fix ring portion second radial direction through hole flow into described in liquid outlet tube.
2. needleless joint as claimed in claim 1, it is characterized in that, described plunger is truncated cone-shaped.
3. needleless joint as claimed in claim 1, it is characterized in that, the lateral wall of described plunger base is provided with annular projection;
The bottom surface of described plunger is convex arc surface.
4. needleless joint as claimed in claim 1, it is characterized in that, described plunger is made up of non-metallic rigid material.
5. the needleless joint as described in claim 1 or 4, is characterized in that,
The material of described plunger is ABS plastic or PP plastics;
The material of described flexible member is silica gel or thermoplastic elastomer (TPE).
6. needleless joint as claimed in claim 1, it is characterized in that, the fixing ring portion of described flexible member has an Embedded Division, and described Embedded Division is embedded in the through hole of housing sidewall, and the second described radial direction through hole is arranged on this Embedded Division.
7. needleless joint as claimed in claim 1, it is characterized in that, the arrival end of described liquid inlet duct and the port of export of described liquid outlet tube are equipped with standard luer fittings.
8. needleless joint as claimed in claim 1, it is characterized in that, the diapire of described housing is provided with passage.
9. needleless joint as claimed in claim 1, is characterized in that, described housing be provided with arm laterally inclinedly, described arm is communicated with described liquid outlet tube.
10. needleless joint as claimed in claim 1, is characterized in that, described housing and described liquid outlet tube integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210163304.0A CN103418048B (en) | 2012-05-24 | 2012-05-24 | Needleless joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210163304.0A CN103418048B (en) | 2012-05-24 | 2012-05-24 | Needleless joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103418048A CN103418048A (en) | 2013-12-04 |
| CN103418048B true CN103418048B (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210163304.0A Active CN103418048B (en) | 2012-05-24 | 2012-05-24 | Needleless joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103418048B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432541B (en) * | 2018-11-16 | 2024-04-19 | 美昕医疗器械（上海）有限公司 | Infusion connector |
| CN112903430B (en) * | 2021-01-18 | 2022-11-11 | 美昕医疗器械（上海）有限公司 | Sealing performance detection equipment and detection method for indwelling needle sleeve base |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509433A (en) * | 1993-10-13 | 1996-04-23 | Paradis; Joseph R. | Control of fluid flow |
| US5699821A (en) * | 1993-10-13 | 1997-12-23 | Paradis; Joseph R. | Control of fluid flow |
| US5806831A (en) * | 1993-10-13 | 1998-09-15 | Paradis; Joseph R. | Control of fluid flow with internal cannula |
| CN201061640Y (en) * | 2007-08-08 | 2008-05-21 | 孙东 | Non-needle enclosed transfusion joint |
| CN201481913U (en) * | 2009-09-14 | 2010-05-26 | 怡安医疗器材股份有限公司 | Low-return pressure and needle-free assembly and device thereof |
| CN101879339A (en) * | 2010-07-12 | 2010-11-10 | 上海康德莱企业发展集团医疗器械有限公司 | Needleless dosing positive pressure connector |
| CN201775831U (en) * | 2010-06-22 | 2011-03-30 | 深圳市安特高科实业有限公司 | Non-needle positive pressure enclosed infusion joint and infusion device |
| CN202620358U (en) * | 2012-05-24 | 2012-12-26 | 美昕医疗器械（上海）有限公司 | Needle-free joint |
-
2012
- 2012-05-24 CN CN201210163304.0A patent/CN103418048B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509433A (en) * | 1993-10-13 | 1996-04-23 | Paradis; Joseph R. | Control of fluid flow |
| US5699821A (en) * | 1993-10-13 | 1997-12-23 | Paradis; Joseph R. | Control of fluid flow |
| US5806831A (en) * | 1993-10-13 | 1998-09-15 | Paradis; Joseph R. | Control of fluid flow with internal cannula |
| CN201061640Y (en) * | 2007-08-08 | 2008-05-21 | 孙东 | Non-needle enclosed transfusion joint |
| CN201481913U (en) * | 2009-09-14 | 2010-05-26 | 怡安医疗器材股份有限公司 | Low-return pressure and needle-free assembly and device thereof |
| CN201775831U (en) * | 2010-06-22 | 2011-03-30 | 深圳市安特高科实业有限公司 | Non-needle positive pressure enclosed infusion joint and infusion device |
| CN101879339A (en) * | 2010-07-12 | 2010-11-10 | 上海康德莱企业发展集团医疗器械有限公司 | Needleless dosing positive pressure connector |
| CN202620358U (en) * | 2012-05-24 | 2012-12-26 | 美昕医疗器械（上海）有限公司 | Needle-free joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103418048A (en) | 2013-12-04 |
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