CN2328376Y - Rubber piston for injector - Google Patents
Rubber piston for injector Download PDFInfo
- Publication number
- CN2328376Y CN2328376Y CN 98214716 CN98214716U CN2328376Y CN 2328376 Y CN2328376 Y CN 2328376Y CN 98214716 CN98214716 CN 98214716 CN 98214716 U CN98214716 U CN 98214716U CN 2328376 Y CN2328376 Y CN 2328376Y
- Authority
- CN
- China
- Prior art keywords
- piston
- tail
- syringe
- injector
- rubber
- 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 discloses a rubber piston for an injector, which is composed of a piston body and a piston tail, wherein, the outer diameter of the piston tail is a little larger than the outer diameter of the piston body, and the bottom face of the piston tail is provided with an annular groove. The utility model can bring good sealing property to an injector and has the advantage of easy push and pull, being especially suitable for a disposable injector.
Description
This utility model relates to the accessory of the syringe that uses in a kind of medical treatment, particularly the syringe rubber piston.
Syringe is the most frequently used medical apparatus and instruments of medical department.Syringe, particularly disposable syringe generally are made up of the rubber piston of syringe, injection rod and injection rod head.Wherein rubber piston is the crucial accessory that influences the syringe products quality.Rubber piston to syringe generally has double requirements, has both required piston seal good, requires injection rod push-and-pull piston brisk again.But at present common rubber piston is difficult to reach simultaneously this two requirements.Because if make the good airproof performance of piston, the external diameter of piston will design more greatly, and the push-and-pull of injection rod is just required great effort very much like this.Otherwise when the injection rod push-and-pull was brisk, the sealing property of rubber piston just descended.
The purpose of this utility model is at the problems referred to above, improves the structure of rubber piston, and the syringe of feasible this rubber piston of use is good airproof performance both, and push-and-pull is brisk again.
The purpose of this utility model is achieved in that this syringe is made up of with the piston tail that links to each other with piston main body piston main body with rubber piston, the external diameter of piston tail is a bit larger tham the external diameter of piston main body, and has an annular groove on the bottom surface of piston tail.The external diameter of piston tail is a bit larger tham the internal diameter of injection tube when design, so just guarantees that piston has better seal in use.Because rubber has certain elasticity, the annular groove of piston tail can make piston tail suitably shrink, and guarantees that the injection rod push-and-pull is brisk.
The syringe rubber piston that this utility model provides, only change its structure by doing, others such as production cost, manufacturing process etc. are constant substantially, and syringe adopts its performance of back to improve greatly, so have higher utility, be specially adapted to disposable syringe.
Below in conjunction with accompanying drawing this utility model is elaborated.
Fig. 1 is the cutaway view of the syringe that provides of this utility model with rubber piston.
Fig. 2 is the sketch map of piston tail.
As shown in Figure 1, this syringe is connected as a single entity with the piston main body (1) and the piston tail (2) of rubber piston, and their inside forms a cavity.Piston tail (2) outside is swallow-tail form, has an annular groove (3) on the bottom surface.
As shown in Figure 2, on piston tail (2) bottom surface circular hole is arranged.The injection rod head enters in the plunger shaft by this hole exactly, and injection rod is connected with rubber piston.
Claims (1)
1, a kind of syringe rubber piston, formed with the piston tail (2) that links to each other with piston main body (1) by piston main body (1), its feature is worked energetically the external diameter of piston main body (1) slightly at the external diameter of stem piston afterbody (2), and has an annular groove (3) on the bottom surface of piston tail (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98214716 CN2328376Y (en) | 1998-05-20 | 1998-05-20 | Rubber piston for injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98214716 CN2328376Y (en) | 1998-05-20 | 1998-05-20 | Rubber piston for injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2328376Y true CN2328376Y (en) | 1999-07-14 |
Family
ID=33968257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98214716 Expired - Fee Related CN2328376Y (en) | 1998-05-20 | 1998-05-20 | Rubber piston for injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2328376Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006024232A1 (en) * | 2004-09-03 | 2006-03-09 | Chaoxiong Chen | Self-destructing syringe |
| CN106964030A (en) * | 2017-04-19 | 2017-07-21 | 深圳安科高技术股份有限公司 | A kind of piston for injector device |
-
1998
- 1998-05-20 CN CN 98214716 patent/CN2328376Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006024232A1 (en) * | 2004-09-03 | 2006-03-09 | Chaoxiong Chen | Self-destructing syringe |
| CN106964030A (en) * | 2017-04-19 | 2017-07-21 | 深圳安科高技术股份有限公司 | A kind of piston for injector device |
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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 |