CN2698372Y - Double self-destructing injection syringe - Google Patents
Double self-destructing injection syringe Download PDFInfo
- Publication number
- CN2698372Y CN2698372Y CN 200420021919 CN200420021919U CN2698372Y CN 2698372 Y CN2698372 Y CN 2698372Y CN 200420021919 CN200420021919 CN 200420021919 CN 200420021919 U CN200420021919 U CN 200420021919U CN 2698372 Y CN2698372 Y CN 2698372Y
- Authority
- CN
- China
- Prior art keywords
- push rod
- piston
- self
- cylindrical shell
- syringe
- 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.)
- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a self-destructing injection syringe, comprising a tube and a plunger piston sliding inside the tube. The joint between the inner wall of the tube and the plunger piston is sealed. The plunger piston is composed of a push rod and a piston covered at the head of the push rod. An anti-pull-back apparatus positioned at the push rod comprises an elastic barb and a lock ring. The elastic barb is inserted into the lock ring so as to lock the push rod. A self-destruction device, used with the piston and positioned at the head of the tube, comprises a needle tube and a perforating syringe needle which falls into the needle tube after transfixing the thin wall of the piston. By adopting the double self-destructing structure, on one hand, the push rod can not be pulled back after injection; on the other hand, the syringe can be completely destroyed by the self-destruction device so that the injection syringe can not be reused.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, particularly a kind of disposable syringe.
Background technology
Syringe is a kind of medical apparatus commonly used, in order to prevent cross infection, it generally should be disposable use, but existing common disposable syringe uses back also reusable (because design defect), some illegal retailers reclaim used syringe, resale after simply sterilizing, packing, and cause the infection of pathogenic bacteria, the shared syringe of some IDU persons also repeats, cross infection, and the harm people's is healthy.Though some syringe can not be reused, complex structure, the cost height is not easy to popularize and uses.
Summary of the invention
Technical problem to be solved in the utility model: provide a kind of simple in structure and can only expendable dual self-destruction syringe.
In order to solve the problems of the technologies described above, this utility model adopts following technical scheme: self-destruction syringe, comprise cylindrical shell and the plunger that in cylindrical shell, slides, keep sealing between cylinder inboard wall and the plunger, plunger is made of push rod and the piston that is enclosed within on the push rod cup, push rod is provided with anti-withdrawing device, and barrel head is provided with and the matching used self-desttruction equipment of piston.After adopting this structure of dual self-destruction: injection is finished rear push-rod and can not be located at the self-desttruction equipment on the barrel head on the other hand toward pulling back on the one hand, and syringe is wracked, and can not reuse.
This utility model can adopt following further technical scheme: described anti-withdrawing device is made of elasticity agnail, lock ring, the elasticity agnail is located at the rear portion of push rod, lock ring is enclosed within on the push rod, and with the pressing mutually of cylindrical shell afterbody, the elasticity agnail snaps in lock ring push rod is locked.When using this syringe, push rod pushes away forward, and after the tube inner liquid medicine all injected human body, the rear portion of push rod had been pushed in the cylindrical shell, and the elasticity agnail on the push rod is also blocked by lock ring, can not pull back and extracts medicinal liquid.
This utility model also adopts following further technical scheme: described self-desttruction equipment is made up of perforation syringe needle and needle tubing, described perforation syringe needle is located on the inwall on the barrel head, needle tubing is embedded in the centre bore of piston, centre bore is connected with air duct on the push rod, and perforation syringe needle transfixation piston thin-walled falls in the needle tubing.During use push rod is pushed away forward, when piston is pulled to the head of cylindrical shell, the perforation syringe needle thrusts the piston thin-walled, propelling along with push rod, the perforation syringe needle is finally with the transfixation of piston thin-walled because centre bore is connected with air duct on the push rod, in this moment cylindrical shell and the air pressure outside the cylindrical shell reaches balance, make to lose negative pressure function in the cylindrical shell, thereby lose drawing liquid and function of injection and self-destruction.
Accompanying drawing
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, this utility model adopts following technical scheme: self-destruction syringe, the plunger 2 that comprises cylindrical shell 1 and in cylindrical shell 1, slide, keep sealing between cylindrical shell 1 inwall and the plunger 2, plunger 2 is made of push rod 3 and the piston 4 that is enclosed within on 3 of the push rods, push rod 3 is hollow, push rod 3 rear portions respectively have elasticity agnail 5 on the relative two side, locking ring set 6 on push rod 3, and with the pressing mutually of cylindrical shell 1 afterbody, when using syringe, push rod 3 pushes away forward, when the elasticity agnail 5 on the push rod 3 was pulled to cylindrical shell 1 afterbody lock ring 6, oppressed and inside gathering elasticity agnail 5 this moment was after elasticity agnail 5 is pushed into lock ring 6 fully and enters cylindrical shell 1, elasticity agnail 5 outwards flicks, the internal diameter of lock ring 6 is littler than the internal diameter of cylindrical shell 1, is slightly larger than the external diameter of push rod 3, and elasticity agnail 5 is blocked and can not pull back by lock ring 6.This utility model also is provided with perforation syringe needle 7 on the inwall on 1 of the cylindrical shell, have centre bore 9 in the piston 4, needle tubing 8 is embedded in the centre bore 9, centre bore 9 is connected with air duct 10 on the push rod 3, when piston 4 was pulled to the head of cylindrical shell 1, the thin-walled of perforation syringe needle 7 transfixation pistons 4 fell in the needle tubing 8, reached balance with cylindrical shell 1 outer air pressure in the cylindrical shell 1 at this moment, make in the cylindrical shell 1 and lose negative pressure function, thereby lose drawing liquid and function of injection and self-destruction.
This utility model is simple in structure, and is easy to use, when using this syringe preparating liquid, sucking or releasing in the process of medicinal liquid, and anti-withdrawing device is not had an effect, and push rod still can move around in cylindrical shell, does not influence original normal running.In addition, anti-withdrawing device and self-desttruction equipment all can use separately, and after dual use, safety factor increases greatly, makes when a certain device defeats, and can guarantee self-destruction perfectly safely.
Claims (3)
1, a kind of dual self-destruction syringe, the plunger (2) that comprises cylindrical shell (1) and in cylindrical shell (1), slide, keep sealing between cylindrical shell (1) inwall and the plunger (2), plunger (2) is made of push rod (3) and the piston (4) that is enclosed within on push rod (3) head, it is characterized in that: described push rod (3) is provided with anti-withdrawing device, and described cylindrical shell (1) head is provided with and the matching used self-desttruction equipment of piston (4).
2, dual self-destruction syringe as claimed in claim 1, it is characterized in that: described anti-withdrawing device is made of elasticity agnail (5), lock ring (6), described elasticity agnail (6) is located at the rear portion of push rod (3), lock ring (6) is enclosed within on the push rod (3), and with the pressing mutually of cylindrical shell (1) afterbody, elasticity agnail (5) snaps in lock ring (6) push rod (3) is locked.
3, dual self-destruction syringe as claimed in claim 1 or 2, it is characterized in that: described self-desttruction equipment is made up of perforation syringe needle (7) and needle tubing (8), described perforation syringe needle (7) is located on the inwall on cylindrical shell (1) head, needle tubing (8) is embedded in the centre bore (9) of piston (4), centre bore (9) is connected with air duct (10) on the push rod (3), and the thin-walled on perforation syringe needle (7) the transfixation piston (4) falls in the needle tubing (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021919 CN2698372Y (en) | 2004-04-15 | 2004-04-15 | Double self-destructing injection syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420021919 CN2698372Y (en) | 2004-04-15 | 2004-04-15 | Double self-destructing injection syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2698372Y true CN2698372Y (en) | 2005-05-11 |
Family
ID=34770127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420021919 Expired - Fee Related CN2698372Y (en) | 2004-04-15 | 2004-04-15 | Double self-destructing injection syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2698372Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431632C (en) * | 2006-04-30 | 2008-11-12 | 应继水 | Self-destruction disposable injector |
| CN1785447B (en) * | 2005-07-18 | 2011-08-03 | 李福根 | Self destroyed low resistance injector |
| CN105169528A (en) * | 2015-07-20 | 2015-12-23 | 苏州百利医疗用品有限公司 | Anti-leakage syringe |
-
2004
- 2004-04-15 CN CN 200420021919 patent/CN2698372Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1785447B (en) * | 2005-07-18 | 2011-08-03 | 李福根 | Self destroyed low resistance injector |
| CN100431632C (en) * | 2006-04-30 | 2008-11-12 | 应继水 | Self-destruction disposable injector |
| CN105169528A (en) * | 2015-07-20 | 2015-12-23 | 苏州百利医疗用品有限公司 | Anti-leakage syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |