CN203280850U - Syringe piston - Google Patents
Syringe piston Download PDFInfo
- Publication number
- CN203280850U CN203280850U CN2013202670193U CN201320267019U CN203280850U CN 203280850 U CN203280850 U CN 203280850U CN 2013202670193 U CN2013202670193 U CN 2013202670193U CN 201320267019 U CN201320267019 U CN 201320267019U CN 203280850 U CN203280850 U CN 203280850U
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- CN
- China
- Prior art keywords
- piston
- push rod
- protrusion
- syringe
- force
- 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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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a syringe piston. The piston body comprises a top portion, a seal ring and a push rod connecting end. At least one protrusion is evenly arranged on the outer surface of the push rod connecting end, the longitudinal direction of the protrusion is parallel to the axis of the piston body, and the protrusion is in contact with the inner wall of an outer barrel. After the protrusion is added, force in the same direction of the force exerted by the push rod is increased, so that acting force needs exerting is reduced. Furthermore, the contact area between the piston and the inner wall of the outer barrel is increased so that silicon oil can enable the piston to be fully lubricated with the inner surface of the outer barrel, and friction force can be reduced.
Description
Technical field
This utility model relates to a kind of piston for injector, particularly disposable syringe or pre-encapsulated injector piston.
Background technology
Syringe generally is comprised of urceolus, push rod, packed-piston, and it extracts medicinal liquid or liquid medicine injection is injected the certain position of human body by mobile putter, realizes the purpose for the treatment of or diagnosis.When extracting medicinal liquid, syringe need to have good sealing property, forms negative pressure within it, could extract medicinal liquid.And when injection liquid, because resistance is injected in existence, also needing syringe to have good sealing property could injection liquid.And between injector push-rod and urceolus, dynamic sealing will realize by piston.
Existing syringe piston mostly uses rubber, silastic material, and makes external diameter and be a bit larger tham the piston of urceolus internal diameter, by extruding, fills in urceolus, leans on the elastic anchorage force of piston to act on outer tube inner wall and realize the leakproof seal purpose.This by the elastic anchorage force sealing, certainly will increase resistance to sliding, the increase operation easier of syringe piston in urceolus.When the syringe capacity is larger, its sliding capability is poorer, and resistance is also larger.Thereby when injection liquid, the power of injecting that medical personnel need is also just larger.How to reduce the problem of frictional resistance between outer tube inner wall and piston, become a great problem that present syringe piston design is produced.
The utility model content
This utility model purpose is: provide a kind of and outer tube inner wall between frictional resistance less, have the piston for injector of good sliding capability.
The technical solution of the utility model is: a kind of syringe piston, comprise piston only, and piston only comprises that top, sealing ring and inside are the push rod link of hollow, the outer surface of described push rod link is provided with at least one projection.
Preferably, described projection is vertically parallel with the axis direction of piston only.
Preferably, described projection is evenly distributed on push rod link outer surface.
Preferably, described top is shaped as taper.
The quantity of projection can require to determine according to size and the concrete operations of syringe and piston.
The utility model has the advantages that:
1. general syringe piston outer surface scribbles the silicone oil of lubricate, and after increasing projection, the contact area between piston and outer tube inner wall increases, thereby silicone oil can make piston and outer tube inner surface sufficient lubrication, reduces frictional resistance.
The projection of the outer surface setting of push rod link can increase the power of same push rod application of force equidirectional, makes the required active force that applies reduce.
Description of drawings
Below in conjunction with drawings and Examples, this utility model is further described:
Fig. 1 is the front view of this utility model embodiment.
Wherein: 1. piston only 11. top 12. sealing ring 13. push rod link 2. projections.
The specific embodiment
Embodiment:
As shown in Figure 1, piston only 1 comprises top 11, sealing ring 12 and push rod link 13, top 11 be shaped as taper, sealing ring 12 contacts with urceolus, guarantees that the medicinal liquid in urceolus is isolated with external environment; The inside of push rod link 13 is hollow, and push rod is arranged on its inside; The outer surface of push rod link 13 is provided with eight projections 2 uniformly, projection 2 vertically parallel with the axis direction of piston only 1, and protruding 2 contact with outer tube inner wall.
In addition, size and the concrete operations that can have more piston only 1 and urceolus of projection 2 quantity require and determine.
The projection 2 of the outer surface setting of push rod link 13 can increase the power of same push rod application of force equidirectional, makes the required active force that applies reduce.The outer surface of piston only 1 also scribbles the silicone oil of lubricate, and after increasing projection 2, the contact area between piston only 1 and outer tube inner wall increases, thereby silicone oil can make piston only 1 and outer tube inner surface sufficient lubrication, reduces frictional resistance.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. syringe piston, comprise piston only (1), piston only (1) comprises that top (11), sealing ring (12) and inside are the push rod link (13) of hollow, and it is characterized in that: the outer surface of described push rod link (13) is provided with at least one projection (2).
2. syringe piston according to claim 1 is characterized in that: described projection (2) vertically parallel with the axis direction of piston only (1).
3. syringe piston according to claim 1, it is characterized in that: described projection (2) is evenly distributed on push rod link (13) outer surface.
4. syringe piston according to claim 1 is characterized in that: described top (11) be shaped as taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202670193U CN203280850U (en) | 2013-05-16 | 2013-05-16 | Syringe piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202670193U CN203280850U (en) | 2013-05-16 | 2013-05-16 | Syringe piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203280850U true CN203280850U (en) | 2013-11-13 |
Family
ID=49537233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202670193U Expired - Lifetime CN203280850U (en) | 2013-05-16 | 2013-05-16 | Syringe piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203280850U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108367855A (en) * | 2015-12-23 | 2018-08-03 | 苏尔寿混合技术有限公司 | The barrel of friction with reduction |
| CN108904928A (en) * | 2018-08-20 | 2018-11-30 | 广州友沃医疗用品有限公司 | A kind of high-pressure injection syringe cylinder structure |
-
2013
- 2013-05-16 CN CN2013202670193U patent/CN203280850U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108367855A (en) * | 2015-12-23 | 2018-08-03 | 苏尔寿混合技术有限公司 | The barrel of friction with reduction |
| US10518958B2 (en) | 2015-12-23 | 2019-12-31 | Sulzer Mixpac Ag | Cartridge with reduced friction |
| CN108904928A (en) * | 2018-08-20 | 2018-11-30 | 广州友沃医疗用品有限公司 | A kind of high-pressure injection syringe cylinder structure |
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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 |
Granted publication date: 20131113 |
|
| CX01 | Expiry of patent term |