CN1485103A - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN1485103A CN1485103A CNA021383847A CN02138384A CN1485103A CN 1485103 A CN1485103 A CN 1485103A CN A021383847 A CNA021383847 A CN A021383847A CN 02138384 A CN02138384 A CN 02138384A CN 1485103 A CN1485103 A CN 1485103A
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- CN
- China
- Prior art keywords
- plastics
- needle guard
- injection rod
- cross
- disposable 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.)
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A disposable injector for intravenous injection or intramuscular injection, comprising plastic bushing, rubber piston, plastic injecting rod, limiting rod, and injection needle. The rubber piston is in the front end of the plastic injecting rod, the plastic injecting rod with the rubber piston is in the plastic bushing. There has a fragile portion between the front cross and the rear cross. A springy bell-mouthed self-locking block is at the rear edge of the front cross. After injecting, the springy bell-mouthed self-locking block is locked in the triangle steps or the rectangle recess of the inner wall of the plastic bushing, thus the plastic injecting rod could be pulled out. If pulling forcefully, the fragile portion will break, so the injector could be used again.
Description
Affiliated technical field:
The present invention draws and a kind of medical apparatus and instruments, particularly relates to the disposable syringe that a kind of injection for intravenous or intramuscular injection are used.
Background technology:
Present used disposable syringe, though title disposable syringe, all has once more or nonexpondable possibility, its weak point is can not preventing virus cross infection phenomenon.
Summary of the invention:
The present invention seeks to overcome the weak point of at present used disposable syringe, provide can only abandon after a kind of injection once and the disposable syringe that can not use for the second time.
The present invention seeks to be achieved through the following technical solutions.Disposable syringe is made up of plastics needle guard, rubber piston, plastics injection rod, gag lever post and entry needle.Rubber piston is contained in the front end of plastics injection rod, and the plastics injection rod that rubber piston is housed is contained in the plastics needle guard, and entry needle is contained on the thin Taper Pipe of plastics needle guard front end, and gag lever post is at plastics injection rod latter half.The plastics injection rod is by dress rubber piston base, and forward and backward cross, handle are formed.One frangible place is arranged between the forward and backward cross of plastics injection rod, on the preceding cross back edge horn mouth elasticity self-locking block is backward arranged, or flexible sawtooth on the pro-cross back edge, plastics needle guard inwall garden have on week several sections not the five equilibrium vertical section be that one vertical section is arranged is rectangle groove for triangle step or plastics needle guard inwall.
Disconnect in the middle of the forward and backward cross of plastics injection rod, only connect on forward and backward cross edge, disconnect around the perhaps forward and backward cross, junction point is only at place, centre, junction easy fracture.Horn mouth is the elasticity self-locking block of (elasticity sawtooth piece crown backward) backward, front end horn mouth diameter (two elasticity sawtooth piece tooth root distances on the straight line) is less than the internal diameter of plastics needle guard, and rear end horn mouth diameter (two elasticity sawtooth piece crown distances on the straight line) is greater than plastics needle guard internal diameter.The preceding cross back edge of plastics injection rod can be made one with horn mouth and also can adopt frangible point to be connected in implementation process.On plastics needle guard inwall circumference, have several sections not the five equilibrium vertical section be that limit of its triangle of triangle step is vertical with plastics needle guard inwall, or plastics needle guard inwall one vertical section is arranged is rectangle groove.
The invention has the beneficial effects as follows like this, when the rubber piston front of plastics injection rod front end touches the plastics needle guard, because horn mouth elasticity self-locking block (elasticity sawtooth piece crown) just in time snaps in last several periods not on the triangle step of five equilibrium or in the rectangle groove of plastics needle guard inwall garden week, the plastics injection rod can not be extracted out, if pull at, the then forward and backward cross of plastics injection rod frangible place fracture, can not use syringe for the second time, thereby prevent the viral cross infection of using syringe to produce because of secondary effectively.
Description of drawings:
Accompanying drawing is a structural representation of the present invention, and wherein Fig. 1 is that the cross rear end is elasticity sawtooth piece and has only middle some disposable syringe at frangible place, structural representation before the plastics injection rod.Fig. 2 is that the cross rear end is horn mouth elasticity self-locking block and has only middle some disposable syringe structural representation at frangible place before the plastics injection rod.Fig. 3 be plastics needle guard inwall garden have on week several sections not before five equilibrium triangle step and the plastics injection rod cross rear end be elasticity sawtooth piece and have only in the middle of disposable syringe structural representation at frangible place a bit.Fig. 4 is that the cross rear end is the separated only disposable syringe structural representation of frangible connection on the cross edge in zigzag elasticity self-locking block and the forward and backward cross before the plastics injection rod.Fig. 5 is the separated only plastics injection rod sketch map of the flexible sawtooth piece of frangible connection and preceding cross rear end on the cross edge in the forward and backward cross.Fig. 6 is separated in the forward and backward cross, and only there is the plastics injection rod sketch map of horn mouth elasticity self-locking block frangible connection and preceding cross rear end on the cross edge.Fig. 7 disconnects the plastics injection rod sketch map that has only middle some connection and the flexible sawtooth piece in preceding cross rear end around the forward and backward cross.Fig. 8 disconnects the plastics injection rod sketch map that has only middle some connection and preceding cross rear end that horn mouth elasticity self-locking block is arranged around the forward and backward cross.
Below in conjunction with description of drawings the invention process and operating position
In the accompanying drawing: 1---entry needle, 2---rubber piston, 3 one plastics needle guards, 4---sawtooth elasticity self-locking block, 5---the plastics injection rod, 6---gag lever post, 7---the vertical section is orthogonal groove, 8---middle a bit frangible place, 9---preceding, frangible junction, back cross edge, 10---plastics needle guard inwall garden week last several sections not the five equilibrium vertical section be the triangle step, 11---horn mouth elasticity self-locking block, 12---cross before the plastics injection rod, 13---cross behind the plastics injection rod
During enforcement, can be by Fig. 1, Fig. 2, Fig. 3, many different compound modes such as Fig. 4, the vertical section of plastics needle guard 3 inwalls be rectangle groove 7 or plastics needle guard have on 3 inwall garden weeks several sections not the five equilibrium vertical section be that triangle step 10 is when being arranged on plastics injection rod front end rubber piston 2 shifting the end onto forward in plastics needle guard 3, cross back edge elasticity sawtooth piece crown (horn mouth elasticity self-locking performance) just in time snaps in plastics needle guard 3 rectangle grooves 9 (or on the plastics needle guard inwall circumference several sections not on the five equilibrium vertical section triangle step 10) before this plastics injection rod, and plastics injection rod 5 can't be pulled out.If in the middle of pulling at then forward and backward cross rupture in 1: 8 frangible place (or frangible junction 9, cross edge, front and back), thereby can not use by secondary, the gag lever post 6 at plastics injection rod 5 later half positions is arranged on when not injecting, elasticity sawtooth piece 4 crowns (horn mouth elasticity self-locking block 11) exist because of gag lever post 6 on this plastics injection rod 5, and can not be stuck in plastics needle guard 3 inwalls vertical profile but in the rectangle groove 7 (or on the plastics needle guard inwall circumference several sections not on the five equilibrium vertical section triangle step 10).This gag lever post 6 is connected with plastics injection rod 5 rear ends, and the junction frangibility fractures gag lever post 6 can inject when needs are injected.
During use, entry needle 1 is put into injection, with plastics injection rod 5 past post-tensionings, injection is extracted in the plastics needle guard 3, when being extracted into needed metering, entry needle 1 is left in the injection, then up with entry needle 1, gently the plastics injection rod is up pushed away, air is extruded, at this moment gag lever post 6 is fractureed and promptly can inject, owing to limit complete 6 to fracture, so can in plastics needle guard 3, shift plastics injection rod 5 onto the end always, at this moment elasticity sawtooth piece 4 crowns (horn mouth elasticity self-locking block) are stuck in the rectangle groove, or on the card plastics needle guard inwall circumference several sections not the five equilibrium vertical section be on triangle step 10, plastics injection rod 5 can not be pulled out again, as if pulling at, then before the plastics injection rod, the frangible junction 8 of back cross (or 9) fracture, thus can not use for the second time again.
Claims (5)
1, a kind of by the plastics needle guard, rubber piston, the plastics injection rod, the disposable syringe that gag lever post and entry needle are formed, rubber piston is contained in plastics injection rod front end, dress is contained in the plastics needle guard by the plastics injection rod of rubber piston, entry needle is contained on the thin dimension pipe of plastics needle guard front end, there is a gag lever post at the later half position of plastics injection rod, the plastics injection rod is by dress rubber piston base, before, back cross, handle is formed, its feature: before the plastics injection rod, one frangible place is arranged between the back cross, on the preceding cross back edge horn mouth elasticity self-locking block is backward arranged, or flexible sawtooth on the pro-cross back edge, plastics needle guard inwall garden have on week several sections not the vertical section of five equilibrium be that one vertical section is arranged is orthogonal groove for triangle step or plastics needle guard inwall.
2, by the described disposable syringe of claim 1, it is characterized in that disconnecting in the middle of the forward and backward cross on the plastics injection rod, only on forward and backward cross edge, disconnect around frangible connection or the front and back cross, junction point is only located in the centre.
3, by the described disposable syringe of claim 1, it is characterized in that horn mouth (elasticity sawtooth piece crown) elasticity self-locking block backward, horn mouth point diameter (two elasticity sawtooth piece tooth root distances on the straight line) is less than the internal diameter of plastics needle guard, and rear end horn mouth diameter (two elasticity sawtooth crown distances on the straight line) is greater than the internal diameter of plastics needle guard.
4,, it is characterized in that the cross back edge can be made one with horn mouth before the plastics injection rod also can adopt frangible point to be connected by the described disposable syringe of claim 1.
5, by the described disposable syringe of claim 1, it is characterized in that having on week in plastics needle guard inwall garden several sections not the five equilibrium vertical section be the triangle step, limit of its triangle and plastics needle guard inwall are perpendicular, or plastics needle guard inwall one vertical section is arranged is rectangle groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021383847A CN1485103A (en) | 2002-09-27 | 2002-09-27 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021383847A CN1485103A (en) | 2002-09-27 | 2002-09-27 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1485103A true CN1485103A (en) | 2004-03-31 |
Family
ID=34147230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021383847A Pending CN1485103A (en) | 2002-09-27 | 2002-09-27 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1485103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233371A (en) * | 2010-07-22 | 2016-01-13 | 贝克顿·迪金森公司 | Dual chamber passive retraction needle syringe |
-
2002
- 2002-09-27 CN CNA021383847A patent/CN1485103A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233371A (en) * | 2010-07-22 | 2016-01-13 | 贝克顿·迪金森公司 | Dual chamber passive retraction needle syringe |
| CN105233371B (en) * | 2010-07-22 | 2019-04-12 | 贝克顿·迪金森公司 | The passive retracted needle syringe of dual cavity |
| US10286160B2 (en) | 2010-07-22 | 2019-05-14 | Becton, Dickinson And Company | Dual chamber passive retraction needle syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |