CN2549987Y - Self-distroy injector - Google Patents
Self-distroy injector Download PDFInfo
- Publication number
- CN2549987Y CN2549987Y CN 02267279 CN02267279U CN2549987Y CN 2549987 Y CN2549987 Y CN 2549987Y CN 02267279 CN02267279 CN 02267279 CN 02267279 U CN02267279 U CN 02267279U CN 2549987 Y CN2549987 Y CN 2549987Y
- Authority
- CN
- China
- Prior art keywords
- core bar
- core rod
- self
- overcoat
- piston
- 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 - Lifetime
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract 6
- 238000000576 coating method Methods 0.000 abstract 6
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Abstract
The utility model relates to a self-destruction syringe, which comprises an injection needle, a coating, a piston and a core rod. The injection needle is directly fixed at the front end of the coating, the piston is connected with the front end of the core rod, and the coating is internally provided with a locking ring which is clamped on the core rod and provided with an elastic clamping claw puncturing to the inner wall of the coating and an elastic pawl clamped on the core rod; moreover, the core rod is axially provided with a ratchet, the circle of the inner wall at the back end of the coating is provided with a limit step for the locking ring. The elastic pawl on the locking ring cooperates with the ratchet of the core rod and is driven by the core rod to only move forwards without backwards in the coating under effect of the elastic pawl. Apart from convenient and stable using, the utility model has advantages of simple structure, reliable back-prevention performance and perfect safety as well as capable of self-destruction after once injection.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically a kind of self-destruction syringe.
Background technology
We know that syringe is a kind of medical apparatus commonly used.It generally comprises syringe needle, overcoat, piston, push rod etc.In order to prevent cross infection, disposable use more and more is subject to people's attention.But present widely used disposable syringe belongs to managerial notion, is not " disposable " on the serviceability, can repeated multiple times use, and leaves hidden danger to cross infection, and propagation tends to produce the disease of.In addition, injection finishes in processing procedure subsequently, because outside syringe needle was exposed to mostly, very easily thorn scratched hospitalized patients, causes new cross infection.Patent 00205827.8 discloses a kind of self-destroy safety injector, by syringe, needle holder, sealing ring, rubber piston and push rod are formed, the syringe front end has cylindrical hole, needle holder is to slide and packs in the syringe cylindrical hole, realize airtight by sealing ring, the needle holder rear end is the puncture cone of band handle, be easy to wear out the rubber piston thin film region at the injection terminal point, agree with the collet of push rod front end in the piston, needle holder is drawn in the syringe together with injection needle, can realize disposable use self-destruction like this, but complex structure, the assembling difficulty, strict to part dimension, serviceability is also stable inadequately.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of simple structure is provided, and is easy to use, stable, retaining dependable performance, the self-destruction syringe that security performance is good.
The technical scheme in the invention for solving the above technical problem is: a kind of self-destruction syringe, it comprises entry needle, overcoat, piston, core bar, entry needle directly is fixed on the overcoat front end, piston is connected the core bar front end, it is characterized in that: be provided with the lock ring of clip on core bar in the overcoat, lock ring is provided with elastic card claw that stabs outer casing inner wall and the elastic pawl that is fastened on the core bar, and the core bar upper edge is axially arranged with ratchet.
This utility model overcoat rear end inwall circumference is provided with the lock ring limited step.
Be provided with the lock ring of clip on core bar in this utility model overcoat, lock ring is provided with elastic card claw that stabs outer casing inner wall and the elastic pawl that is fastened on the core bar ratchet, and it can only move to preceding in overcoat under the drive of core bar, can not retreat.Against existing technologies, after injection (or getting blood etc.) work is finished, piston is shifted the top onto, core bar drives lock ring and is positioned at a certain position in the overcoat, and core bar and piston just can only be moving in this restricted portion pulled rearward, are fastened on the core bar frustum type ratchet foremost until the elastic pawl on the lock ring, core bar drives lock ring and is locked at the overcoat front end, core bar, piston etc. can not move forward, and can not pull back, otherwise core bar will be broken.Realize only self-destruction of syringe with this, avoid syringe to reuse for once using.This utility model simple structure, easy to use, stable, security performance is good.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a local structure for amplifying sketch map of the present utility model;
Fig. 3 is a lock ring structural representation of the present utility model.
1. helmets among the figure, 2. entry needle, 3. piston, 4. overcoat, 5. lock ring, 6. core bar, 7. claw, 8. ratchet, 9. ratchet, 10. limited step.
The specific embodiment
From Fig. 1, Fig. 2 as can be seen, a kind of self-destruction syringe of this utility model, it comprises helmet 1, entry needle 2, piston 3, overcoat 4, core bar 6, entry needle 2 directly is fixed on overcoat 4 front ends, piston 3 is connected core bar 6 front ends, piston 3 is better elastic bodies, and its front end shape is consistent with overcoat inner chamber front end shape, can reduce the residual liquid amount of injection so effectively.The above-mentioned The Nomenclature Composition and Structure of Complexes prior art of this utility model is basic identical, is not giving unnecessary details.
Characteristics of the present utility model are: be provided with the lock ring 5 of clip on core bar 6 in the overcoat 4, lock ring 5 is opening-like, so that assembling, as Fig. 2, shown in Figure 3.Lock ring 5 rear portions are provided with elastic card claw 7 that stabs outer casing inner wall and the elastic pawl 8 that is fastened on the core bar, and claw 7 has good elasticity, and tilt to overcoat 4 inwalls, are supported in the overcoat by elastic dilatation, can move forward, and can not retreat.This utility model overcoat 4 rear end inwall circumference are provided with lock ring 5 limited steps 10, and during assembling, the claw 7 on the lock ring 5 is compressed, and can conveniently enter in the overcoat, and be fixed in this position.The core bar upper edge is axially arranged with ratchet 9, and the elastic pawl 8 on the core bar cooperates with ratchet 9, and core bar 6 relative resilient ratchets 8 can only be retreated, and can not move forward.The ratchet 9 that is axially arranged with on this utility model core bar can be the folded tooth of successive frustum type, it can form successive the cooperation with the elastic pawl 8 on the lock ring 5, drive lock ring 5 reaches, until moving to the overcoat front end, lock piston 3, elastic card claw 7 diagonal stabbings on it can not retreat on outer casing inner wall.
After this utility model uses injection (or getting blood etc.) work to finish, piston 3 is shifted the top onto, core bar 6 drives lock ring 5 and is positioned at a certain position in the overcoat, core bar and piston just can only be moving in this restricted portion pulled rearward, be fastened on the core bar frustum type ratchet foremost until the elastic pawl on the lock ring 58, promote core bar 6 drive lock rings 5 and move to the overcoat front end, elastic card claw 7 diagonal stabbings of lock ring can not retreat on outer casing inner wall.Core bar, piston etc. can not move forward, and can not pull back, otherwise core bar will be broken.Realize only self-destruction of syringe with this, avoid syringe to reuse for once using.This utility model simple structure, easy to use, stable, security performance is good.
Claims (3)
1. self-destruction syringe, it comprises entry needle, overcoat, piston, core bar, entry needle directly is fixed on the overcoat front end, piston is connected the core bar front end, it is characterized in that: be provided with the lock ring of clip on core bar in the overcoat, lock ring is provided with elastic card claw that stabs outer casing inner wall and the elastic pawl that is fastened on the core bar, and the core bar upper edge is axially arranged with ratchet.
2. self-destruction syringe according to claim 1 is characterized in that: overcoat rear end inwall circumference is provided with the lock ring limited step.
3. self-destruction syringe according to claim 2 is characterized in that: the ratchet that is axially arranged with on the core bar is the folded tooth of successive frustum type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02267279 CN2549987Y (en) | 2002-05-24 | 2002-05-24 | Self-distroy injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02267279 CN2549987Y (en) | 2002-05-24 | 2002-05-24 | Self-distroy injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2549987Y true CN2549987Y (en) | 2003-05-14 |
Family
ID=33732901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02267279 Expired - Lifetime CN2549987Y (en) | 2002-05-24 | 2002-05-24 | Self-distroy injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2549987Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444649B (en) * | 2008-12-30 | 2011-01-12 | 林作钱 | Low-residual safe self-destructing injector |
| CN110448768A (en) * | 2019-09-16 | 2019-11-15 | 常州市双马医疗器材有限公司 | Single-Use Auto-Disable Syringes |
-
2002
- 2002-05-24 CN CN 02267279 patent/CN2549987Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444649B (en) * | 2008-12-30 | 2011-01-12 | 林作钱 | Low-residual safe self-destructing injector |
| CN110448768A (en) * | 2019-09-16 | 2019-11-15 | 常州市双马医疗器材有限公司 | Single-Use Auto-Disable Syringes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120524 Granted publication date: 20030514 |