CN2539533Y - Self-destroying safety syringe - Google Patents
Self-destroying safety syringe Download PDFInfo
- Publication number
- CN2539533Y CN2539533Y CN 02212891 CN02212891U CN2539533Y CN 2539533 Y CN2539533 Y CN 2539533Y CN 02212891 CN02212891 CN 02212891 CN 02212891 U CN02212891 U CN 02212891U CN 2539533 Y CN2539533 Y CN 2539533Y
- Authority
- CN
- China
- Prior art keywords
- core bar
- core rod
- self
- overcoat
- needle holder
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000010409 thin film Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 206010011409 Cross infection Diseases 0.000 description 3
- 206010029803 Nosocomial infection Diseases 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method 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
- 239000003814 drug Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a self-destroying safety injector which comprises a casing, a needle seat, a sealing ring, a plunger and a core rod, wherein the front end of the casing is provided with a cylindrical hole in which the needle seat is arranged in a slide mode; the back end of the needle seat is provided with a shanked puncturing cone, and the front end of the plunger is provided with a film zone; the front end of the core rod in the plunger is provided with an elastic clamping head, and the back end of the casing is provided with a retreat stopping ring; two dummy clubs are arranged on the circumference of the inner wall of the casing, and a retreat stopping dummy club with conicity is arranged on the center circumference of the retreat stopping ring with; an open slot is arranged on a front wall in an axial direction, the inside circumference of the retreat stopping ring is also provided with a positioning slot for a core rod, and a positioning dummy club is correspondingly arranged between a weak zone on the core rod and a push pedal of the core rod. The utility model has the advantages of simple structure, convenient and stable use and reliable retreat stopping performance. While in use, the core rod can not move forwards or can not be pulled backwards with good safety performance. The self-destroying injector can be automatically destroyed after injection for one time.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, specifically a kind of self-destroy safety injector.
Background technology
We know that syringe is a kind of medical apparatus commonly used.It generally comprises syringe, piston, push rod, syringe needle.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 be realized disposable use self-destruction like this, but since syringe and needle holder to be provided with step spacing, design, it is reasonable inadequately to connect, needle holder is easily rotated, and syringe needle can not be changed, the assembling difficulty, to the strictness of sealing ring dimensional requirement, serviceability is stable inadequately.Patent 01243599.6 provides a kind of disposable use self-destroy safety injector, it is axially arranged with some strip bulges at overcoat nose circle post hole inwall, the sealing ring front portion correspondingly is axially arranged with some strip grooves on the needle holder outer wall, during use, needle holder can not rotated, after injection finished, the overcoat rear end also was provided with piston and push pedal locking mechanism, but this mechanism retaining performance is 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, the retaining dependable performance, and security performance is good, is the self-destroy safety injector of self-destruction after the shot.
The technical scheme in the invention for solving the above technical problem is: a kind of self-destroy safety injector, it comprises overcoat, needle holder, sealing ring, piston, core bar, the overcoat front end has cylindrical hole, needle holder is to slide and packs in the overcoat cylindrical hole, the needle holder rear end is provided with the puncture cone of band handle, piston nose is provided with thin film region, the core bar front end is provided with collet in the piston, it is characterized in that: the overcoat rear end is equipped with the retaining ring, the outer casing inner wall circumference is provided with two boss, retaining ring intermediate circumference is provided with the retaining boss of band tapering, be axially arranged with open slot on the front walls, retaining ring inside circumference also is provided with the core bar locating slot, correspondingly is provided with positioning boss between weak area and the push pedal on the core bar.
The rear portion of push pedal has tapering on this utility model core bar.
This utility model overcoat rear end firmly is equipped with the retaining ring, and adopts the retaining ring lock to decide core bar, piston etc., against existing technologies, after injection finishes, they can not be moved forward, can not pull back, and the core bar that can fracture by the weak area on the core bar.Can realize self-destruction after the shot, the damage reliable in function, this utility model simple structure, easy to use, stable, during use, needle holder can not rotated, and 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 the structural representation of this utility model stopping mechanism;
Fig. 3 is the structural representation of this utility model retaining ring.
1. entry needles among the figure, 2. sealing ring, 3. needle holder, 4. piston, 5. overcoat, 6. core bar, 7. retaining ring, 8. push pedal, 9. positioning boss, 10. weak area, 11. direct tooth type boss, 12. boss, 13. the retaining boss, 14. break slots, 15. core bar locating slots, 16. dovetail boss, 17. cross gathering sills.
The specific embodiment
As can be seen from Figure 1, a kind of self-destroy safety injector of this utility model, it comprises overcoat 5, needle holder 3, sealing ring 2, piston 4, core bar 6 etc.Overcoat 5 front ends have cylindrical hole, and needle holder 3 is to slide and packs in overcoat 5 cylindrical holes, realizes airtight by sealing ring 2.Needle holder 3 front ends connect entry needle 1.Be with sealing ring 2 on the needle holder 3, sealing ring 2 matches with seal groove on the overcoat 5 front end cylindrical holes, and is airtight to realize.Also play a part to stop needle holder when drawing liquid and puncture, in overcoat, to move simultaneously.Needle holder 3 sealing ring rear portions are flat tapered, and its tapering α is 5 ° ~ 20 °, and flat horizontal surface is provided with the through hole that links to each other with centre bore, to form medicine liquid channel.Correspondingly overcoat cylindrical hole seal groove rear portion also processes certain tapering, it is consistent with flat tapered needle holder tapering, like this, can play good tapering positioning action, prevent that needle holder from extruding from front end, and can reduce the residual liquid amount of injection effectively, needle holder 3 rear ends are provided with the puncture cone of band handle, piston 4 front ends are provided with thin film region, the core bar front end is provided with collet in the piston, the puncture cone is worn out the rubber piston thin film region at the injection terminal point, agrees with collet, and needle holder is drawn in the overcoat together with injection needle.On this utility model core bar 6, push pedal 8 rear portions are provided with the weak area 10 in the connection, damage so that separate.
The above-mentioned The Nomenclature Composition and Structure of Complexes of this utility model is existing concrete description in patent application formerly, is not giving unnecessary details.
It can also be seen that from Fig. 1, Fig. 2 this utility model overcoat 5 rear ends also are provided with stopping mechanism.It is equipped with retaining ring 7 in the overcoat rear end, the outer casing inner wall circumference is provided with two boss 11,12, inboard boss is direct tooth type, be direct tooth type boss 11,12 of direct tooth type boss 11 and boss form retaining loop mapping groove, install and fix retaining ring 7 by two boss 11,12, retaining ring 7 can not be moved forward, can not retreat.Fig. 3 is the structural representation of retaining ring, as shown in Figure 3, considers the needs of installation, and retaining ring 7 adopts two semi-circular structures of split, and its rear end is provided with cross gathering sill 17, and the gusset on the core bar 6 can move along its axis.Retaining ring 7 intermediate circumference are provided with the retaining boss 13 of band tapering, are axially arranged with open slot 14 on the front walls.Retaining ring 7 inside circumference also are provided with core bar locating slot 15, are provided with positioning boss 9 between weak area 10 and the push pedal 9 on the core bar 6, as shown in Figure 2.Core bar locating slot 15 and positioning boss 9 cooperate the location, and the core bar of pulling out can not be moved forward.Retaining ring 7 rearward end are the expansion of certain taper, are dovetail boss 16, and it is fastened on the rear port of overcoat 5, with guarantee the retaining ring can not before move up in the overcoat.
Push pedal 8 rear portions have tapering on this utility model core bar 6, and when pulling back core bar to certain position, the push pedal of band tapering can enter retaining ring 7 front ports, the expansion of retaining ring 7 open slots 14 front ends, make it be clamped on overcoat direct tooth type boss 11 before, can not retreat.
When this utility model uses, after injection finishes, the pull core bar 6 backward, core bar 6 drives pistons 4 with push pedal and be connected the needle holder of agreeing with, move behind the syringe needle etc., positioning boss 16 on the core bar 6 enters the core bar locating slot 15 of retaining ring inboard, at this moment, push pedal 8 just in time enters retaining ring front port, like this, the expansion of retaining ring 7 break slots 14 front ends, very stably fixed piston and core bar can not move forward them, can not pull back, at this moment, can realize separating self-destruction by the weak area on the core bar 6 10 core bar that fractures, syringe needle etc. also are enclosed in the overcoat 5.Realize real disposable use.
Claims (2)
1. self-destroy safety injector, it comprises overcoat, needle holder, sealing ring, piston, core bar, the overcoat front end has cylindrical hole, needle holder is to slide and packs in the overcoat cylindrical hole, the needle holder rear end is provided with the puncture cone of band handle, piston nose is provided with thin film region, the core bar front end is provided with collet in the piston, it is characterized in that: the overcoat rear end is equipped with the retaining ring, the outer casing inner wall circumference is provided with two boss, and retaining ring intermediate circumference is provided with the retaining boss of band tapering, is axially arranged with open slot on the front walls, retaining ring inside circumference also is provided with the core bar locating slot, correspondingly is provided with positioning boss between weak area and the push pedal on the core bar.
2. self-destroy safety injector according to claim 1 is characterized in that: the push pedal rear portion has tapering on the core bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02212891 CN2539533Y (en) | 2002-02-07 | 2002-02-07 | Self-destroying safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02212891 CN2539533Y (en) | 2002-02-07 | 2002-02-07 | Self-destroying safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2539533Y true CN2539533Y (en) | 2003-03-12 |
Family
ID=33692494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02212891 Expired - Lifetime CN2539533Y (en) | 2002-02-07 | 2002-02-07 | Self-destroying safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2539533Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028296A1 (en) * | 2005-09-09 | 2007-03-15 | Shandong Weigao Group Medical Polymer Co., Ltd | A safety syringe |
| WO2007065324A1 (en) * | 2005-12-10 | 2007-06-14 | Shandong Weigao Group Medical Polymer Co., Ltd | A disposable safety syringe |
-
2002
- 2002-02-07 CN CN 02212891 patent/CN2539533Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007028296A1 (en) * | 2005-09-09 | 2007-03-15 | Shandong Weigao Group Medical Polymer Co., Ltd | A safety syringe |
| WO2007065324A1 (en) * | 2005-12-10 | 2007-06-14 | Shandong Weigao Group Medical Polymer Co., Ltd | A disposable safety syringe |
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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: 20120207 Granted publication date: 20030312 |