CN2380241Y - Plastic piston for injector - Google Patents
Plastic piston for injector Download PDFInfo
- Publication number
- CN2380241Y CN2380241Y CN 99228539 CN99228539U CN2380241Y CN 2380241 Y CN2380241 Y CN 2380241Y CN 99228539 CN99228539 CN 99228539 CN 99228539 U CN99228539 U CN 99228539U CN 2380241 Y CN2380241 Y CN 2380241Y
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- CN
- China
- Prior art keywords
- piston
- utility
- model
- cavity
- projection
- 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 relates to a plastic piston for injectors, which belongs to medical appliances. The outer periphery wall of a cylinder of the piston is provided with convex circumferential direction sealing rings, and the piston is provided with a cavity which is matched with the top part of a push rod. The utility model is characterized in that the lower end face of the piston is provided with at least more than three bumps. Therefore, the utility model has the characteristics of easy cleaning and drying; besides, the utility model can reduce materials of the piston, and can lower the cost of the piston.
Description
This utility model relates to the piston that a kind of disposable syringe is used, and belongs to medical apparatus and instruments.
The piston that existing syringe is used, its polycrystalline substance is the plane of ring seal, because of piston all adopts elasticity rubber preferably, plastics etc. are made, therefore piston is carrying out acid in batches, in the cleaning process in surface treatment that alkali cleans and road, back, piston in service sink or the cleaning case in a single day two piston bottom surfaces contacts the back because of tight applying mutually, produce adsorption, liquid in the piston cavity can not be discharged, bring certain difficulty to cleaning, simultaneously in dry run, also adsorb mutually because of it or be adsorbed on the drying tray, the cavity of piston is difficult for being dried, and causes uneven drying even.
The purpose of this utility model provides a kind of easy cleaning, oven dry, and the syringe plastic piston of economical with materials.
For the technical scheme that achieves the above object is: a kind of syringe plastic piston, lobed circumferential seal ring on the cylinder periphery wall of piston, piston has the cavity that matches with the push rod top, it is characterized in that: have the projection more than three on the lower surface of piston at least.
After having adopted technique scheme, because the bottom of piston has projection, therefore the baseplane of piston is not the plane of a sealing, in cleaning and dry run, even the bottom of two-piston contacts, under the supporting of projection, all there is the space on the bottom surface and other contactant surface that guarantee piston, therefore, stifled adsorption phenomena of having cut off between the piston, the emptying in time of the liquid in the piston cavity, not only be convenient to clean, guaranteed the cleaning quality of piston, and piston cavity dried easily also, piston drying in batches is very even.Secondly, piston is installed in the top of push rod, and the plane of the projection of its piston bottom surface and the bearing-surface of push rod join, so the length overall of piston is constant, reduces the materials of piston, has saved material, has reduced the cost of piston simultaneously.
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the upward view of Fig. 1.
Syringe plastic piston as shown in Figure 1, 2, the shape of top land 1 can be cone or be the plane, the top of itself and syringe jacket matches, lobed circumferential seal ring 2 on the cylinder periphery wall of piston, for keeping piston that better seal is arranged, circumferential seal ring 2 has 2～3, and piston has the cavity 4 that matches with the push rod top, this cavity 4 can be as shown in Figure 1, and the hole of cavity 4 bottoms is less than the hole on cavity 4 tops.Has the projection 5 more than three on the lower surface 3 of piston at least; therefore can guarantee that the baseplane of piston is not the planar annular of a sealing; so can not produce mutual adsorption with other contactant, made things convenient for the cleaning and the drying of piston, also reduced the cost of piston simultaneously.
As described in Fig. 1,2, projection 5 can be distributed on the lower plane 3 of piston, and the cross section of this projection 5 can be arbitrary shapes such as circle, side.
Claims (2)
1, a kind of syringe plastic piston, lobed circumferential seal ring (2) on the cylinder periphery wall of piston, piston have the cavity (4) that matches with the push rod top, it is characterized in that: have the projection (5) more than three on the lower surface of piston (3) at least.
2, syringe plastic piston according to claim 1 is characterized in that: projection (5) can uniformly be arranged on the lower surface (3) of piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228539 CN2380241Y (en) | 1999-06-03 | 1999-06-03 | Plastic piston for injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228539 CN2380241Y (en) | 1999-06-03 | 1999-06-03 | Plastic piston for injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2380241Y true CN2380241Y (en) | 2000-05-31 |
Family
ID=34017906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228539 Expired - Fee Related CN2380241Y (en) | 1999-06-03 | 1999-06-03 | Plastic piston for injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2380241Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109172885A (en) * | 2018-09-29 | 2019-01-11 | 温学辉 | A kind of simple adjustable negative pressure therapeutic device |
| CN109310830A (en) * | 2016-06-13 | 2019-02-05 | 奥罗菲诺制药集团责任有限公司 | The prefilled injection devices of three chambers |
-
1999
- 1999-06-03 CN CN 99228539 patent/CN2380241Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109310830A (en) * | 2016-06-13 | 2019-02-05 | 奥罗菲诺制药集团责任有限公司 | The prefilled injection devices of three chambers |
| CN109172885A (en) * | 2018-09-29 | 2019-01-11 | 温学辉 | A kind of simple adjustable negative pressure therapeutic device |
| CN109172885B (en) * | 2018-09-29 | 2020-11-20 | 温学辉 | Simple and easy adjustable negative pressure treatment 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 |