CN201505343U - rubber piston - Google Patents
rubber piston Download PDFInfo
- Publication number
- CN201505343U CN201505343U CN2009202312017U CN200920231201U CN201505343U CN 201505343 U CN201505343 U CN 201505343U CN 2009202312017 U CN2009202312017 U CN 2009202312017U CN 200920231201 U CN200920231201 U CN 200920231201U CN 201505343 U CN201505343 U CN 201505343U
- Authority
- CN
- China
- Prior art keywords
- main body
- piston
- piston main
- rubber
- rubber 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 - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a rubber piston used in injectors, which comprises a piston main body, wherein a placing hollow cavity is arranged in the piston main body, a ring-shaped slot is at least arranged on the circumference of the piston main body, the slot edges of the ring-shaped slot are equal, a convex area is arranged on the top portion of the piston main body, the convex area is arranged on the middle portion of the piston main body, and the convex area is in a crossed shape. In the structure of the utility model, the ring-shaped slot is arranged on the circumference of the piston body, the frication force generated when the rubber piston is pushed and pulled can be reduced, the rubber piston can be easily pushed, the edge heights of the ring-shaped slot are equal, the sealing effect between the rubber piston and a needle tube can be guaranteed, and unnecessary loss of drug when an injector is used to inject drug can be reduced.
Description
Technical field
This utility model relates to the syringe that injection is used in a kind of medical apparatus and instruments, is specifically related to a kind of rubber piston that is used in the syringe.
Background technology
As indispensable injection tool in the medical apparatus and instruments; the quality of syringe sealing property depends primarily on the rubber piston in the needle tubing; when in to needle tubing, injecting liquid medicine; because the poor sealing of rubber piston in the needle tubing; the phenomenon of liquid leakage occurs through regular meeting, cause the waste of medicinal liquid, just must increase the external diameter of rubber piston if guarantee the sealing of rubber piston; will cause like this when the push-and-pull piston, the frictional force between piston and the needle tubing increases.
The utility model content
At the problems referred to above, the purpose of this utility model provides the rubber piston of the brisk and good seal performance of a kind of push-and-pull.
Rubber piston comprises piston main body, is provided with the cavity of depositing in the piston main body, piston main body circumferentially is provided with a cannelure at least, and the trough rim height of described cannelure equates that described piston main body top is provided with projection, described projection is arranged on the middle part of piston main body, raises into crosswise.
When the number of above-mentioned cannelure greater than 1 the time, two cannelures between adjacent adopt arc transition, the height of described transition arc can guarantee the sealing property of rubber piston on a height.
The bottom of described piston main body is provided with projection, and its projection is evenly distributed in the bottom periphery of piston main body.
In order to alleviate the frictional force when the push-and-pull rubber piston, so be provided with cannelure at the bottom periphery of described piston main body, because rubber piston has elasticity, the cannelure groove width is dwindled, and reduces friction when promoting piston.
Adopt such scheme, this structure of the present utility model, piston only cannelure circumferentially is set, can reduce the frictional force when the push-and-pull rubber piston, brisk promotion rubber piston; The height of trough rim equates, can guarantee the sealing effectiveness between rubber piston and the needle tubing, the medicinal liquid unnecessary loss when having reduced syringe tube injection medicinal liquid.
Description of drawings
Fig. 1 is a cutaway view of the present utility model;
In the accompanying drawing, 1 is piston main body, and 2 is cavity, and 3 is cannelure, and 4 is projection, and 5 is transition arc, and 6 is projection, and 7 is cannelure.
The specific embodiment
As shown in Figure 1, rubber piston, comprise piston main body 1, be provided with the cavity of depositing 2 in the piston main body 1, piston main body 1 circumferentially is provided with a cannelure 3 at least, and the trough rim height of described cannelure 3 equates that described piston main body 1 top is provided with projection 4, described protruding 4 are arranged on the middle part of piston main body 1, and projection 4 is crosswise.When the number of above-mentioned cannelure 3 greater than 1 the time, two cannelures 3 between adjacent adopt arc transition, the height of described transition arc 5 is on a height.The bottom of described piston main body 1 is provided with projection 6, and its projection 6 is evenly distributed in the bottom periphery of piston main body 1.The bottom periphery of described piston main body 1 also is provided with cannelure 7.
Claims (4)
1. rubber piston, comprise piston main body, be provided with the cavity of depositing in the piston main body, piston main body circumferentially is provided with a cannelure at least, it is characterized in that: the trough rim height of described cannelure equates, described piston main body top is provided with projection, and described projection is arranged on the middle part of piston main body, raises into crosswise.
2. rubber piston according to claim 1 is characterized in that: when the number of above-mentioned cannelure greater than 1 the time, two cannelures between adjacent adopt arc transition, the height of described transition arc is on a height.
3. rubber piston according to claim 1 is characterized in that: the bottom of described piston main body is provided with projection, and its projection is evenly distributed in the bottom periphery of piston main body.
4. rubber piston according to claim 1 is characterized in that: the bottom of described piston main body also is provided with cannelure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202312017U CN201505343U (en) | 2009-08-28 | 2009-08-28 | rubber piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202312017U CN201505343U (en) | 2009-08-28 | 2009-08-28 | rubber piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201505343U true CN201505343U (en) | 2010-06-16 |
Family
ID=42466479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202312017U Expired - Fee Related CN201505343U (en) | 2009-08-28 | 2009-08-28 | rubber piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201505343U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104888313A (en) * | 2015-06-29 | 2015-09-09 | 山东威高集团医用高分子制品股份有限公司 | Low-resistance injector |
| CN105555341A (en) * | 2013-10-02 | 2016-05-04 | 住友橡胶工业株式会社 | Gasket for pre-filled syringe |
-
2009
- 2009-08-28 CN CN2009202312017U patent/CN201505343U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105555341A (en) * | 2013-10-02 | 2016-05-04 | 住友橡胶工业株式会社 | Gasket for pre-filled syringe |
| CN105555341B (en) * | 2013-10-02 | 2019-12-31 | 住友橡胶工业株式会社 | Gasket for prefilled syringe |
| CN104888313A (en) * | 2015-06-29 | 2015-09-09 | 山东威高集团医用高分子制品股份有限公司 | Low-resistance injector |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20100828 |