CN202620358U - Needle-free joint - Google Patents
Needle-free joint Download PDFInfo
- Publication number
- CN202620358U CN202620358U CN 201220236235 CN201220236235U CN202620358U CN 202620358 U CN202620358 U CN 202620358U CN 201220236235 CN201220236235 CN 201220236235 CN 201220236235 U CN201220236235 U CN 201220236235U CN 202620358 U CN202620358 U CN 202620358U
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- CN
- China
- Prior art keywords
- plunger
- hole
- housing
- radial direction
- needle adapter
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- 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.)
- Withdrawn - After Issue
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a needle-free joint. The needle-free joint comprises a shell which is provided with a cavity, a plunger, an elastic component and a liquid outlet pipe, wherein a liquid inlet pipe is arranged at the upper end of the shell, and a side wall of the shell is provided with a through hole; the plunger can move between a first position and a second position in the cavity of the shell; the plunger is provided with an axial through hole, and a first radial through hole is formed on a side wall of the plunger; the elastic component comprises an inserted connection part, a wrapping part and a fixing ring part; the inserted connection part is inserted into the axial through hole of the plunger; the section of the wrapping part is U-shaped, and the wrapping part consists of an inner ring, an outer ring and a bottom ring; an annular groove for accommodating the bottom of the plunger is enclosed by the inner ring, the outer ring and the bottom ring; the fixing ring part is hermetically connected with an inner wall of the shell, and a second radial through hole is formed in the fixing ring part; and the liquid outlet pipe is arranged on the side surface of the shell and is communicated with the through hole of the side wall of the shell. The needle-free joint produces the positive pressure which pushes a liquid medicine in the shell toward the liquid outlet pipe when closed, so that the backflow of the liquid medicine is prevented. In addition, the magnitude of the positive pressure can be changed by changing the sizes of the plunger and the elastic component.
Description
Technical field
This utility model relates to the no needle adapter that cooperates transfusion catheter and syringe to use, can prevent medicinal liquid backflow and blood back clinically.
Background technology
At present, in the time of in the venous transfusion therapeutic process, need infusing prolonged and repeatedly or inject, multiselect be with venous detaining needle or inlying catheter.These venous detaining needles or inlying catheter connect the threeway conduit usually, are furnished with standard luer (Luer) joint or calparine cap on the threeway conduit usually, to satisfy the clinical requirement of multiple transfusion.But there is certain defective in above-mentioned medical apparatus and instruments in clinical use: the use of female luer on the tee T, and need carry out partly sterilised at every turn, and will use entry needle to puncture, so just increase work load and operational risk to medical and nursing work; The use of calparine cap then needs medical personnel after the filling medicinal liquid, and injection heparin or normal saline carry out tube sealing in calparine cap, prevents that blood coagulation from forming thrombosis, and this brings burden to clinical manipulation equally.In addition, the application of calparine cap also might cause little air to get into blood circulation, has risk.
Simultaneously, above-mentioned two kinds of apparatuses all can't solve after transfusion accomplishes, because the negative pressure that produces when drawing back entry needle or not having needle adapter causes blood of human body to pass back into the indwelling flexible pipe, blood coagulation is blocked needle tubing, stop transfusion next time and the serious potential safety hazard that produces.
Summary of the invention
This utility model technical problem to be solved is to provide a kind of no needle adapter, and it is produced the unidirectional normal pressure that prevents medicinal liquid backflow even blood back by no needle adapter itself after accomplishing transfusion.
The technical scheme that this utility model adopted is: a kind of no needle adapter 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 between a primary importance and a second position in the housing cavity; This plunger is provided with axially extending bore, and the sidewall of plunger is provided with first radial direction through hole; Flexible member comprises Plug Division, parcel portion and fixing ring portion; The Plug Division is inserted in the axially extending bore of plunger; The cross section of parcel portion is " U " shape, and this parcel portion is made up of internal ring, outer shroud and base ring; The upper end of internal ring links to each other with the bottom of Plug Division, and the upper end of outer shroud links to each other with the fixing bottom of ring portion; This internal ring, outer shroud and base ring surround the annular groove of the bottom of a ccontaining plunger; Fixedly ring portion and inner walls are tightly connected, and fixedly are being provided with one second radial direction through hole on the ring portion, 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 was in described primary importance, plunger was closed and the seal fluid inlet tube, and the inlet of 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 first radial direction through hole of plunger, and the axially extending bore that the liquid that flows into from liquid inlet duct can be through plunger, 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 no needle adapter, wherein, plunger is a truncated cone-shaped.
Above-mentioned no needle adapter, wherein, plunger is processed by nonmetal rigid material.
Above-mentioned no needle adapter, 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 no needle adapter, 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 second radial direction through hole is arranged on this Embedded Division.
Above-mentioned no needle adapter, 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 no needle adapter, wherein, housing be provided with arm laterally inclinedly, arm is communicated with liquid outlet tube.
The utility model has the advantages that:
1. the no needle adapter of this utility model is when closing; The parcel portion of flexible member and the space between the plunger diminish gradually; The volume of the flow path of the liquid in the space diminishes; Because the volume-variation of flow path of the liquid, generation will not have the normal pressure that liquid residual in the needle adapter promotes to liquid outlet tube, thereby prevent that medicinal liquid from refluxing even blood back.Therefore, when the no needle adapter of this utility model accomplish to screw out syringe, transfusion device etc. in transfusion, can avoid causing medicinal liquid to reflux even blood is back to the phenomenon of veins indwelling catheter because of producing negative pressure.This utility model adopts the needleless operation, has ensured medical personnel's safety, has improved medical and nursing work efficient, has alleviated less patient suffering; And this no needle adapter can pass through to change the size of plunger and flexible member, and obtains different normal pressures;
2. plunger of this utility model and flexible member all can adopt through chemical action bonded (chemically-bonded) lubricant; Guarantee smooth and reliable operation, avoided simultaneously causing lubricant to be injected into the device and even the intravital phenomenon of sufferer in these no needle adapter downstream as lubricant owing to materials such as using silicone oil;
3. the flexible member of this utility model plunger adopts silica gel or thermoplastic elastomer (TPE) manufacturing, is convenient to combine the antibacterial material to use together, and is suitable for using the occasion of MRI;
4. when the needleless joint is in closed condition, be interference fit between plunger and the flexible member, make end face not have the slit, convenient sterilizing; In addition, do not preserve the dead space of residual liquid between flexible member and the plunger, improved the safety of continuous transfusion.
Description of drawings
Fig. 1 is the schematic perspective view according to the no needle adapter of this utility model one embodiment.
Fig. 2 is that wherein, plunger is in primary importance according to the cross-sectional schematic of the no needle adapter of this utility model one embodiment.
Fig. 3 is that wherein, plunger is in the second position according to the cross-sectional schematic of the no needle adapter of this utility model one embodiment.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is described in further detail.
Referring to figs. 1 to Fig. 3.The no needle adapter of this utility model comprises housing 1, plunger 2, flexible member 3 and liquid outlet tube 4.
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 the end face of Plug Division 31 and plunger 2 is in same horizontal plane; The inlet of 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.
During by the pushing of the external infusion device such as external female luer, plunger 2 moves down at the end face of plunger 2, and the parcel portion 32 that drives flexible member 3 stretches downwards, and Plug Division 31 moves down, thereby makes generation space 23 between plunger 2 and the parcel portion 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 first radial direction through hole 22 of plunger; First radial direction through hole 22 of plunger and fixedly second radial direction through hole, 332 alignment of ring portion of flexible member; First radial direction through hole 22 of the axially extending bore 21 of the medicinal liquid that flows into from liquid inlet duct 11 through plunger, plunger and flexible member be second radial direction through hole, the 332 influent outlets 4 of ring portion fixedly, flow in other conduit of inlying catheter that links to each other the process of completion clinical transfusion then from liquid outlet tube 4.
In a preferred embodiment, plunger 2 is a Rotary-table, thereby when plunger 2 moves down, drives parcel portion 32 extensional deformations more easily.The lateral wall of plunger base is provided with annular projection 24, is beneficial between plunger 2 and parcel portion 32, produce space 23.The bottom surface of plunger 2 is a convex arc surface.In addition, when moving down, plunger 2, preferably, a passage 13 is set on the diapire of housing 1 at the excessive pressure of inner chamber 102 accumulated of housing.
After external female luer was screwed out, flexible member 3 reinstatements drove plunger 2 and move to primary importance.At this moment; The parcel portion 32 of flexible member and the space 23 between the rigidity plunger 2 diminish gradually; The volume of the flow path of the liquid in the space 23 diminishes; Because the volume-variation of flow path of the liquid, generation will not have liquid residual in the needle adapter to the normal pressure that liquid outlet tube 4 promotes, make residual medicinal liquid continue first radial direction through hole 22 and flexible member through plunger fixedly in second radial direction through hole, the 332 influent outlets 4 of ring portion.That is, make the residual liquor in the no needle adapter, continue to flow, thereby avoided medicinal liquid because the caused medicinal liquid of negative pressure that produces when screwing out external female luer refluxes even blood refluxes along former flow direction.
Be to satisfy the demand of carrying 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 among the 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 this embodiment has combined certain embodiments, but it should be understood by one skilled in the art that this utility model is not limited to embodiment described here, and can carry out various modifications and variation and do not deviate from the spirit and the scope of this utility model.
Claims (10)
1. a no needle adapter 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 between a primary importance and a second position in the housing cavity; This plunger is provided with axially extending bore, and the sidewall of plunger is provided with first radial direction through hole;
Flexible member comprises Plug Division, parcel portion and fixing ring portion; Said Plug Division is inserted in the axially extending bore of said plunger; The cross section of said parcel portion is " U " shape, and this parcel portion is made up of internal ring, outer shroud and base ring; The upper end of said internal ring links to each other with the bottom of Plug Division, and the upper end of said outer shroud links to each other with the bottom of said fixedly ring portion; This internal ring, outer shroud and base ring surround the annular groove of the bottom of a ccontaining said plunger; Said fixedly ring portion and inner walls are tightly connected, and fixedly are being provided with one second radial direction through hole on the ring portion, 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 said housing, and is connected with the through hole of housing sidewall;
When said plunger was in described primary importance, plunger was closed and the seal fluid inlet tube, and the inlet of first radial direction through hole of plunger is blocked in the Plug Division of flexible member;
When said plunger is in the described second position; The Plug Division of flexible member moves to the below of first radial direction through hole of plunger, and the axially extending bore that the liquid that flows into from liquid inlet duct can be through plunger, first radial direction through hole of plunger and flexible member fixedly second radial direction through hole of ring portion flow into described liquid outlet tube.
2. no needle adapter as claimed in claim 1 is characterized in that, said plunger is a truncated cone-shaped.
3. no needle adapter as claimed in claim 1 is characterized in that the lateral wall of said plunger base is provided with annular projection;
The bottom surface of said plunger is a convex arc surface.
4. no needle adapter as claimed in claim 1 is characterized in that said plunger is processed by nonmetal rigid material.
5. like claim 1 or 4 described no needle adapters, it is characterized in that,
The material of said plunger is ABS plastic or PP plastics;
The material of said flexible member is silica gel or thermoplastic elastomer (TPE).
6. no needle adapter as claimed in claim 1 is characterized in that, the fixedly ring portion of said flexible member has an Embedded Division, and said Embedded Division is embedded in the through hole of housing sidewall, and described second radial direction through hole is arranged on this Embedded Division.
7. no needle adapter as claimed in claim 1 is characterized in that, the arrival end of said liquid inlet duct and the port of export of said liquid outlet tube are equipped with the standard luer joint.
8. no needle adapter as claimed in claim 1 is characterized in that the diapire of said housing is provided with passage.
9. no needle adapter as claimed in claim 1 is characterized in that, said housing be provided with arm laterally inclinedly, said arm is communicated with described liquid outlet tube.
10. no needle adapter as claimed in claim 1 is characterized in that, said housing and said liquid outlet tube are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220236235 CN202620358U (en) | 2012-05-24 | 2012-05-24 | Needle-free joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220236235 CN202620358U (en) | 2012-05-24 | 2012-05-24 | Needle-free joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202620358U true CN202620358U (en) | 2012-12-26 |
Family
ID=47373609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220236235 Withdrawn - After Issue CN202620358U (en) | 2012-05-24 | 2012-05-24 | Needle-free joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202620358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418048A (en) * | 2012-05-24 | 2013-12-04 | 美昕医疗器械（上海）有限公司 | Needle-free joint |
-
2012
- 2012-05-24 CN CN 201220236235 patent/CN202620358U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418048A (en) * | 2012-05-24 | 2013-12-04 | 美昕医疗器械（上海）有限公司 | Needle-free joint |
| CN103418048B (en) * | 2012-05-24 | 2015-08-19 | 美昕医疗器械（上海）有限公司 | Needleless joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121226 Effective date of abandoning: 20150819 |
|
| RGAV | Abandon patent right to avoid regrant |