CN2696653Y - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN2696653Y CN2696653Y CN 200420025150 CN200420025150U CN2696653Y CN 2696653 Y CN2696653 Y CN 2696653Y CN 200420025150 CN200420025150 CN 200420025150 CN 200420025150 U CN200420025150 U CN 200420025150U CN 2696653 Y CN2696653 Y CN 2696653Y
- Authority
- CN
- China
- Prior art keywords
- rubber piston
- injection rod
- plastics
- needle guard
- plastics injection
- 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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Abstract
The utility model provides a disposable injector for an intravenous injection or an intramuscular injection, comprising a plastic needle guard, a rubber piston, a plastic injection rod, a spacing rod and a needle. The rubber piston is installed on the front end of the plastic injection rod, and the plastic injection rod with the rubber piston installed in is installed in the plastic needle guard. A frangible part is provided between the base and the core, which are provided with the rubber piston, of the plastic injection rod; one end of the rubber piston adjacent to the base of the plastic injection rod is provided with a self-locking block with a triangular longitudinal section, rectangular longitudinal section or a semicircular longitudinal section; the circumference of the inner wall of the plastic needle guard is provided with a step with a triangular longitudinal section or a groove with a triangular or rectangular longitudinal section. When an injection is finished, because the triangular, rectangular or circular step self-locking block on the back end of the rubber piston is jammed at the step with the triangular longitudinal section or the groove with the triangular or rectangular longitudinal section on the inner wall of the plastic needle guard; so the plastic injection rod can not be extracted, if the plastic injection rod is pulled with force, the frangible part on the plastic injection rod is broken off, and the injector can not be reused thereby; so the cross infection of viruses can be prevented.
Description
Affiliated technical field:
This utility model relates to 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.
The utility model content:
This utility model purpose is the weak point that overcomes 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.
This utility model purpose is 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 made up of the fuse of dress rubber piston base, cross, handle and dress rubber piston.Between the fuse of plastics injection rod dress rubber piston and the dress rubber piston base a frangible junction is arranged, the diameter of junction is between 1mm to 2mm, it is triangle or rectangle or semicircular self-locking block that rubber piston has a vertical section near that head of dress plastics injection rod base, its maximum gauge is greater than between rubber piston point diameter 0.5mm～1.5mm, and its length is less than 2mm.It is that one vertical section is arranged is rectangle or triangular groove for triangle step or plastics needle guard inwall that plastics needle guard inwall has the vertical section.
The beneficial effects of the utility model are like this, when the rubber piston front of plastics injection rod front end touches the plastics needle guard, since rubber piston near plastics injection rod base that vertical section is arranged is triangle or rectangle or circular self-locking block, just in time snap on the plastics needle guard inwall circumference on the triangle step or in triangle or the rectangle groove, the plastics injection rod can not be extracted out, if pull at, then frangible junction fracture between the fuse of plastics injection rod dress rubber piston and the dress rubber piston base, the fuse of dress rubber piston breaks in the plastics needle guard on rubber piston and the plastics injection rod, thereby can not use syringe for the second time, prevent the viral cross infection of using syringe to produce because of secondary effectively.When not needing to inject, because the triangle on the rubber piston or rectangle or circular self-locking block exist because of gag lever post on the plastics injection rod, and the vertical section that can not be stuck on the plastics needle guard inwall circumference is in triangle or the rectangle groove or the triangle step.
Description of drawings:
Below in conjunction with accompanying drawing and enforcement this utility model is further specified, accompanying drawing 1 is this utility model triangle self-locking block disposable syringe structural representation, accompanying drawing 2 is this utility model Rectangle self-locked piece disposable syringe structural representations, accompanying drawing 3 is plastics injection rod structural representations, accompanying drawing 4 is triangular groove structural representations on the plastics needle guard inwall circumference, accompanying drawing 5 is that the vertical section of rubber piston is a Rectangle self-locked block structure sketch map, accompanying drawing 6 is that the vertical section of rubber piston is a Rectangle self-locked block structure sketch map, and accompanying drawing 7 is that the vertical section of rubber piston is semicircle self-locking block structural representation.
Implement and operating position below in conjunction with description of drawings this utility model
In the accompanying drawing: 1---entry needle, 2---rubber piston, 3---the plastics needle guard, 4---the fuse of dress rubber piston, 5---plastics injection rod cross, 6---gag lever post, 7---plastics injection rod handle, 8---plastics injection dress rubber piston base, 9---the rubber piston vertical section is triangle or circle or Rectangle self-locked piece, 10---the plastics injection rod is adorned the fuse of rubber piston and is adorned frangible junction between the rubber piston base, 11---it is triangular groove (triangle step or rectangle groove) that the vertical section is arranged on the plastics needle guard inwall circumference
During enforcement, assemble by accompanying drawing, with the vertical section of plastics needle guard 3 inwalls is that triangular groove 11 is when being arranged on plastics injection rod front end rubber piston 2 shifting the end onto forward in plastics needle guard 3, rubber piston 2 vertical sections that are contained in the plastics injection rod be triangle self-locking block 9 just in time snap on the plastics needle guard 3 inwall circumference triangular groove 11 in, the plastics injection rod can't be pulled out, if pull at, one frangible junction 10 fractures are then arranged between the fuse 4 of the base 8 of plastics injection rod dress rubber piston and dress rubber piston, thereby can not use by secondary, the gag lever post 6 at the later half position of plastics injection rod is arranged on when not injecting, the triangle self-locking block 9 of rubber piston exists because of gag lever post 6 on this plastics injection rod, and the vertical section that can not be stuck on the plastics needle guard 3 inwall circumference is in the rectangle groove 11, this gag lever post 6 is connected with plastics injection rod rear end, the junction frangibility fractures gag lever post 6 can inject when needs are injected.
During use, entry needle 1 is put into injection, with the past post-tensioning of plastics injection rod, 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, because spacing 6 have fractureed, so can in plastics needle guard 3, shift the plastics injection rod onto the end always, at this moment rubber piston triangle self-locking block 9 is stuck on the plastics needle guard 3 inwall circumference in the triangular groove 11, and the plastics injection rod can not be pulled out again, if pull at.Then frangible junction 10 fractures between the fuse 4 of plastics injection rod dress rubber piston base 8 and rubber piston, thus can not use for the second time again.
Claims (3)
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, cross, handle and dress rubber piston fuse are formed, it is a triangle step or vertical section is arranged is rectangle or triangular groove that one vertical section is arranged on the plastics needle guard inwall circumference, it is characterized in that between the fuse of above-mentioned plastics injection rod dress rubber piston and dress rubber piston base a frangible junction being arranged, it is triangle or rectangle or semicircle self-locking block that rubber piston has a vertical face near that head of plastics injection rod base.
2, disposable syringe according to claim 1 is characterized in that at above-mentioned triangle or rectangle or circular self-locking block, its maximum gauge is greater than between the rubber piston point diameter 0.5mm to 1.5mm, and its length is less than 2mm.
3,, it is characterized in that its diameter is between 1mm to 2mm in the above-mentioned frangible junction that has according to the described disposable syringe of claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420025150 CN2696653Y (en) | 2004-03-02 | 2004-03-02 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420025150 CN2696653Y (en) | 2004-03-02 | 2004-03-02 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2696653Y true CN2696653Y (en) | 2005-05-04 |
Family
ID=34770897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420025150 Expired - Fee Related CN2696653Y (en) | 2004-03-02 | 2004-03-02 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2696653Y (en) |
-
2004
- 2004-03-02 CN CN 200420025150 patent/CN2696653Y/en not_active Expired - Fee Related
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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 |