CN203253003U - Piston for injector - Google Patents
Piston for injector Download PDFInfo
- Publication number
- CN203253003U CN203253003U CN 201320269130 CN201320269130U CN203253003U CN 203253003 U CN203253003 U CN 203253003U CN 201320269130 CN201320269130 CN 201320269130 CN 201320269130 U CN201320269130 U CN 201320269130U CN 203253003 U CN203253003 U CN 203253003U
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- CN
- China
- Prior art keywords
- piston
- injector
- utility
- model
- internal layer
- 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 - Lifetime
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- Materials For Medical Uses (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a piston for an injector. The outer surface of the inner layer of the piston is provided with barb-like mortise and tenon; the inner surface of the outer layer of the piston is provided with a bayonet in a matching manner; and after the inner layer and the outer layer of the piston are fixedly connected, heat pressing combination treatment is performed. When a push rod arranged on the piston is pushed or pulled, the inner layer and the outer layer of the piston are not easy to drop off because of the mortise and tenon and the bayonet, so that the injector can be normally used.
Description
Technical field
This utility model relates to syringe piston, is specifically related to a kind of piston of foreign material.
Background technology
The syringe that uses now is generally disposable syringe or pre-encapsulated injector, and their structure is roughly similar, mainly contains by urceolus, push rod, piston etc. to form.Often in order to reduce manufacturing cost, piston is designed to the piston of foreign material, comprise inside and outside two-layer, the outer requirement of piston has chemistry or biocompatibility, material in the piston cladding material can not advance into the liquid pollution medicinal liquid or change its therapeutical effect, and can not have the active substance from medicinal liquid to enter piston; And internal layer is fixedly connected with push rod, only is required to be common natural rubber or synthetic rubber and gets final product.
But piston is inside and outside two-layer through after the hot binding, when with the push rod mobile piston, because inside and outside two-layer connection is insecure, ectonexine can occurs come off, thereby cause syringe normally to use.
The utility model content
This utility model purpose is: provide to have the foreign material piston of stablizing firm syndeton between the piston ectonexine.
The technical solution of the utility model is: a kind of piston for injector, and comprise the piston skin of hollow and place the interior piston internal layer of piston skin, the outer surface of piston internal layer is provided with at least one trip, and the outer field inner surface of piston arranges the bayonet socket of coupling.
Preferably, described trip is shaped as barb type.
The quantity of trip can be formulated according to the size of piston and the degree of being connected firmly of piston ectonexine.
The utility model has the advantages that: the piston ectonexine is two kinds of different materials, be fixedly connected with between trip and the bayonet socket, and then carry out hot binding, after push rod is installed on the piston, when promoting to move with pull, be connected firmly between the piston ectonexine, difficult drop-off can not affect the normal use of syringe.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further described.
Fig. 1 is cutaway view of the present utility model
Wherein: 1. outer 2. piston internal layers, 3. trips of piston 4. bayonet sockets.
The specific embodiment
Embodiment:
As shown in Figure 1, the inside of piston skin 1 is hollow, its material by chemistry or bio-compatibility is made, piston internal layer 2 is made by the lower natural or synthetic rubber of price, the outer surface of piston internal layer 2 is provided with four barb type trips 3, the matched position of the inner surface of piston skin 1 is provided with four bayonet sockets 4 with trip 3 coupling, and piston outer 1 carries out the hot binding processing with after piston internal layer 2 is fixedly connected with.Piston internal layer 2 also is hollow structure, is used for being fixedly connected with push rod.
In addition, the quantity of trip 3 can be formulated according to the size of piston and the degree of being connected firmly of piston ectonexine.
During use, when promotion or pull push rod, because the existence of trip 3 and bayonet socket 4, difficult drop-off between piston outer 1 and the piston internal layer 2 can not affect the normal use of syringe.
Those skilled in the art will readily understand; the above only is preferred embodiment of the present utility model; not in order to limit this utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. piston for injector, comprise the piston outer (1) of hollow and place the interior piston internal layer (2) of piston outer (1), it is characterized in that: the outer surface of piston internal layer (2) is provided with at least one trip (3), and the inner surface of piston outer (1) arranges the bayonet socket (4) of coupling.
2. a kind of piston for injector according to claim 1 is characterized in that: described trip (3) be shaped as barb type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269130 CN203253003U (en) | 2013-05-16 | 2013-05-16 | Piston for injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269130 CN203253003U (en) | 2013-05-16 | 2013-05-16 | Piston for injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203253003U true CN203253003U (en) | 2013-10-30 |
Family
ID=49465615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320269130 Expired - Lifetime CN203253003U (en) | 2013-05-16 | 2013-05-16 | Piston for injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203253003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898293A (en) * | 2019-12-31 | 2020-03-24 | 深圳市迈威生物科技有限公司 | Syringe piston, piston assembly and syringe |
-
2013
- 2013-05-16 CN CN 201320269130 patent/CN203253003U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898293A (en) * | 2019-12-31 | 2020-03-24 | 深圳市迈威生物科技有限公司 | Syringe piston, piston assembly and syringe |
| CN110898293B (en) * | 2019-12-31 | 2021-05-04 | 深圳市迈威生物科技有限公司 | Syringe piston, piston assembly and syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |