CN103418048A - Needle-free joint - Google Patents
Needle-free joint Download PDFInfo
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- CN103418048A CN103418048A CN2012101633040A CN201210163304A CN103418048A CN 103418048 A CN103418048 A CN 103418048A CN 2012101633040 A CN2012101633040 A CN 2012101633040A CN 201210163304 A CN201210163304 A CN 201210163304A CN 103418048 A CN103418048 A CN 103418048A
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- plunger
- hole
- housing
- radial direction
- flexible member
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Abstract
The invention discloses a needle-free joint which comprises a shell with a cavity, a plunger, an elastic element and a liquid outlet pipe. A liquid inlet pipe is arranged at the upper end of the shell, a through hole is formed in the side wall of the shell, the plunger can move between a first position and a second position in the cavity of the shell and is provided with a through hole, a first radial through hole is formed in the side wall of the plunger, the elastic element comprises an inserting-connecting portion, a wrapping portion and a fixed ring portion, the inserting-connecting portion is inserted into an axial through hole of the plunger, the section of the wrapping portion is U-shaped, the wrapping portion is composed of an inner ring, an outer ring and a bottom ring which encircle to form an annular groove containing the bottom of the plunger, the fixed ring portion is in sealed connection with the inner wall of the shell, a second radial through hole is formed in the fixed ring portion, and the liquid outlet pipe is arranged on the side face of the shell and communicated with the through hole in the side wall of the shell. Positive pressure to push liquid medicine in the shell to the liquid outlet pipe is generated when the needle-free joint is closed, so that backflow of the liquid medicine is prevented. In addition, the positive pressure can be changed by changing the sizes of the plunger and the elastic element.
Description
Technical field
The present invention relates to coordinate clinically transfusion catheter and syringe to use, can prevent that medicinal liquid from refluxing and the needleless joint of blood back.
Background technology
At present, in the infusion process, need to be infused or while injecting prolonged and repeatedly, venous detaining needle or inlying catheter for multiselect.The common connecting tee conduit of these venous detaining needles or inlying catheter, be furnished with standard Luer (Luer) joint or calparine cap usually on the threeway conduit, to meet the clinical requirement of multiple transfusion.But, in clinical use, there is certain defect in above-mentioned medical apparatus and instruments: the use of female Luer on tee T, and need to carry out partly sterilised at every turn, and will use entry needle to be punctured, so just to medical and nursing work, increase work load and operational risk; The use of calparine cap, need medical personnel after adding injecting medical liquid, and in calparine cap, injection heparin or normal saline carry out tube sealing, prevents that blood coagulation from forming thrombosis, and 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, has risk.
Simultaneously, after above-mentioned two kinds of apparatuses all can't solve and infuse, the negative pressure produced owing to drawing back entry needle or needleless joint, cause blood of human body to pass back into the indwelling flexible pipe, and blood coagulation is blocked needle tubing, stops transfusion next time and the serious potential safety hazard 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 produced and to be prevented the medicinal liquid even unidirectional normal pressure of blood back that refluxes by needleless joint itself after completing transfusion.
The technical solution adopted in the present invention is: a kind of needleless joint comprises: 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 the housing cavity 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, comprise Plug Division, parcel and fixing ring portion; Plug Division is inserted in the axially extending bore of plunger; The cross section of parcel is " U " shape, and this parcel consists 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 fixing bottom of ring portion; This internal ring, outer shroud and base ring surround the annular groove of the bottom of an accommodating plunger; Fixedly ring portion and inner walls are tightly connected, and fixedly on ring portion, are being 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, be arranged on the side of housing, and be connected with the through hole of housing sidewall; When plunger, during in described primary importance, plunger is closed and the 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 during 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 axially extending bore that the liquid flowed into from liquid inlet duct can be by plunger, the first radial direction through hole of plunger and flexible member be the second radial direction through hole influent outlet of ring portion fixedly.
Above-mentioned needleless joint, wherein, plunger is truncated cone-shaped.
Above-mentioned needleless joint, wherein, plunger is made by nonmetal rigid material.
Above-mentioned needleless joint, wherein, the material of plunger is ABS plastic or PP plastics, the material of flexible member is silica gel or thermoplastic elastomer (TPE).
Above-mentioned needleless joint, wherein, the fixedly 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 the standard Luer joint.
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, the parcel of flexible member and the space between plunger diminish gradually, the volume of the flow path of the liquid in space diminishes, volume-variation due to flow path of the liquid, generation promotes normal pressure from liquid residual in needleless joint to liquid outlet tube, thus prevent the medicinal liquid even blood back that refluxes.Therefore, needleless joint of the present invention completes while screwing out syringe, transfusion device etc. in transfusion, can avoid causing medicinal liquid to reflux even blood backflow to the phenomenon of veins indwelling catheter because producing negative pressure.The present invention adopts the needleless operation, has ensured medical personnel's safety, has improved medical and nursing work efficiency, has alleviated patient's misery; And this needleless joint can pass through to change the size of plunger and flexible member, and obtains different normal pressures;
2. plunger of the present invention and flexible member all can adopt (chemically-bonded) lubricant by the chemical action combination, guarantee smooth and reliable operation, avoided as lubricant, causing lubricant to be injected into the device in this needleless joint downstream and even the phenomenon in patient due to materials such as using silicone oil simultaneously;
3. the flexible member of plunger of the present invention adopts silica gel or thermoplastic elastomer (TPE) manufacture, is convenient to use together in conjunction with the antibacterial material, and is suitable for applying the occasion of MRI;
4. during in closed condition, between plunger and flexible member, be interference fit at needleless joint, make end face there is no gap, convenient sterilizing; In addition, do not preserve the dead space of residual liquid between flexible member and plunger, improved the safety of continuous transfusion.
The 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.
The specific embodiment
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.
As shown in Figure 2, when plunger 2 during 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 the end face of Plug Division 31 and plunger 2 is in same level, the entrance of the first radial direction through hole 22 of plunger is blocked in Plug Division 31, has realized that plunger 2 is closed and seal fluid inlet tube 11.
When the end face of plunger 2 is pushed by the external infusion device such as external female Luer, plunger 2 moves down, and the parcel 32 that drives flexible member 3 stretches downwards, and Plug Division 31 moves down, thereby makes generation 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 first radial direction through hole 22 of plunger and flexible member be the second radial direction through hole 332 alignment of ring portion fixedly, the first radial direction through hole 22 of the axially extending bore 21 of the medicinal liquid flowed into from liquid inlet duct 11 by plunger, plunger and flexible member be the second radial direction through hole 332 influent outlets 4 of ring portion fixedly, then flow in connected other conduit of inlying catheter from liquid outlet tube 4, complete the process of clinical transfusion.
In a preferred embodiment, plunger 2 is Rotary-table, thereby, when plunger 2 moves down, more easily drives parcel 32 extensional deformations.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, at the excessive pressure of inner chamber 102 inner accumulated of housing, preferably, a passage 13 is set on the diapire of housing 1 while moving down for fear of plunger 2.
After external female Luer is screwed out, flexible member 3 reinstatements, drive plunger 2 and move to primary importance.Now, the parcel 32 of flexible member and the space 23 between rigidity plunger 2 diminish gradually, the volume of the flow path of the liquid in space 23 diminishes, volume-variation due to flow path of the liquid, generation promotes normal pressure from liquid residual in needleless joint to liquid outlet tube 4, make residual medicinal liquid continue the first radial direction through hole 22 by plunger and flexible member fixedly in the second radial direction through hole 332 influent outlets 4 of ring portion.That is, make the residual liquor in needleless joint, continue to flow along former flow direction, the even blood backflow thereby the caused medicinal liquid of negative pressure of having avoided medicinal liquid to produce owing to screwing out external female Luer refluxes.
For meet the demand carry multiple-medicinal-liquid simultaneously, at 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.Only show an arm in figure, also can in the side of housing 1, a plurality of arms be set according to the requirement of transfusion.Arm can be integrally formed with housing and liquid outlet tube.
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 do 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 the housing cavity 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, comprise 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 " U " shape, and this parcel consists 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 fixedly ring portion; This internal ring, outer shroud and base ring surround the annular groove of the bottom of an accommodating described plunger; Described fixedly ring portion and inner walls are tightly connected, and fixedly on ring portion, are being 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, be arranged on the side of described housing, and be connected with the through hole of housing sidewall;
When described plunger, during in described primary importance, plunger is closed and the 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 during 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 axially extending bore that the liquid flowed into from liquid inlet duct can be by plunger, the first radial direction through hole of plunger and flexible member fixedly the second radial direction through hole of ring portion flow into described liquid outlet tube.
2. needleless joint as claimed in claim 1, is characterized in that, described plunger is truncated cone-shaped.
3. needleless joint as claimed in claim 1, 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, is characterized in that, described plunger is made by nonmetal rigid material.
5. needleless joint as described as 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, is characterized in that, the fixedly ring portion of described flexible member has an Embedded Division, and described Embedded Division is embedded in the through hole of housing sidewall, and described the second radial direction through hole is arranged on this Embedded Division.
7. needleless joint as claimed in claim 1, 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 the standard Luer joint.
8. needleless joint as claimed in claim 1, 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 are 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 true CN103418048A (en) | 2013-12-04 |
| CN103418048B 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432541A (en) * | 2018-11-16 | 2019-03-08 | 美昕医疗器械（上海）有限公司 | A kind of infusion connector |
| CN112903430A (en) * | 2021-01-18 | 2021-06-04 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432541A (en) * | 2018-11-16 | 2019-03-08 | 美昕医疗器械（上海）有限公司 | A kind of infusion connector |
| CN112903430A (en) * | 2021-01-18 | 2021-06-04 | 美昕医疗器械（上海）有限公司 | Sealing performance detection equipment and detection method for indwelling needle sleeve base |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103418048B (en) | 2015-08-19 |
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