CN103656804A - Piston for injector - Google Patents
Piston for injector Download PDFInfo
- Publication number
- CN103656804A CN103656804A CN201410008050.4A CN201410008050A CN103656804A CN 103656804 A CN103656804 A CN 103656804A CN 201410008050 A CN201410008050 A CN 201410008050A CN 103656804 A CN103656804 A CN 103656804A
- Authority
- CN
- China
- Prior art keywords
- piston
- sealing ring
- main body
- injector
- piston main
- 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.)
- Pending
Links
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a piston for an injector. The piston for the injector comprises a piston top part and a piston body, wherein the piston body is a hollow cylinder with an opening in the bottom; the lower part of the hollow cylinder is connected with a push rod of the injector; the upper part of the hollow cylinder and the piston top part form a piston contraction cavity; a sealing ring is arranged on the outer part of the piston body; the piston top part is of a conical structure with a thin wall; and the tail end of the conical surface of the piston top part and the upper edge of the sealing ring on the top part of the piston body form an annular plane boss. Due to the plane boss and the piston contraction cavity structure on the top part of the piston, the sealing performance and the blood return preventing performance of the injector can be improved, and the safety in use is enhanced.
Description
Technical field
The present invention relates to piston, particularly a kind of injector for medical purpose piston.
Background technology
The syringe of domestic and international clinical use at present, is comprised of urceolus, push rod, piston, realizes the object of taking out fluid injection body by push rod push-and-pull piston, realizes the function of syringe.The sealing property of piston structure and syringe and blood return prevention performance are closely bound up.Chinese invention patent application CN103170035A, the pre-filled pipe syringe that fills of blood return prevention type is provided with piston retraction chamber between top land and push rod, and top land is thin-wall construction, by top land, be out of shape to stop top land to enter hollow channel, avoid blood back.But the sealing ring on the top of this piston and piston body top has adopted tangent structure.When top land is subject to can driving the sealing ring tangent with it together inwardly to shrink when washing pipe pressure generation deformation is inwardly shunk, cause the minimizing of the contact area of sealing ring and syringe sleeve, sealing property reduces.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, a kind of piston with good sealing property and blood return prevention is provided.
The technical scheme that technical solution problem of the present invention adopts is:
A kind of piston for injector, comprise top land and piston main body, piston main body is the hollow circular cylinder of bottom opening, hollow circular cylinder bottom can be connected with the push rod of syringe, the top of hollow circular cylinder and top land form piston retraction chamber, it is characterized in that, piston main body outside is provided with sealing ring, top land is the conical structure of thin-walled, and the top edge of top land conical surface end and piston main body top seal ring forms the plane boss of an annular.
As a kind of optimal way, piston main body outer surface is provided with three sealing rings, the first sealing ring is positioned at piston main body bottom, the 3rd sealing ring is piston main body top seal ring, the second sealing ring, between the first sealing ring and the 3rd sealing ring, accounts for the 1/2-3/4 of the 3rd sealing ring and the first sealing ring spacing, makes the easier deform ation prevention blood back of the first half of piston, there is piston thread piston main body hollow circular cylinder inside, and piston thread is connected in piston only on injector push-rod.
The top edge of its top conical surface end of piston of the present invention and piston main body top seal ring forms the plane boss of an annular, but not tangent structure, and top land has piston retraction chamber, can guarantee when top land is subject to washing pipe pressure generation deformation and is inwardly retracted to piston retraction chamber, can not drive the 3rd sealing ring together inwardly to shrink, thereby the sealing property of having avoided the minimizing with the contact area of syringe sleeve to cause reduce.Boss makes taper seat not be subject to the deformation effect of sealing ring, thereby more easily makes the effective anti-return blood of whole taper seat thin-wall construction distortion.Therefore, the syringe piston of this structure can effectively anti-return blood, strengthens safety in utilization.
Accompanying drawing explanation
The front view of Fig. 1 piston for injector of the present invention.
The structural representation of Fig. 2 piston for injector of the present invention.
The cutaway view of Fig. 3 piston for injector of the present invention.
In figure, 1 top land, 2 piston main bodies, 21 piston retraction chambeies, 22 piston thread, 23 first sealing rings, 24 second sealing rings, 25 piston main body top seal rings, 26 plane boss.
The specific embodiment
As shown in Figure 1-Figure 3, a kind of piston for injector, comprise top land 1 and piston main body 2, the hollow circular cylinder that piston main body 2 is bottom opening, hollow circular cylinder bottom can be connected with the push rod of syringe, the top of hollow circular cylinder and top land 1 form piston retraction chamber 21, piston main body outside is provided with sealing ring, as optimal way, piston main body outer surface is provided with three sealing rings, the first sealing ring 23 is positioned at piston main body 2 bottom, the 3rd sealing ring is piston main body top seal ring 25, the second sealing ring 24 is between the first sealing ring 25 and the 3rd sealing ring 23, the 1/2-3/4 of the first sealing ring 23 and piston main body top seal ring 25 spacing, there is piston thread 22 piston main body 2 hollow circular cylinder inside, piston thread 22 is connected in piston only 2 on injector push-rod, the conical structure that top land 1 is thin-walled, the top edge of top land conical surface end and piston main body top seal ring 25 forms the plane boss 26 of an annular.
Claims (2)
1. a piston for injector, comprise top land and piston main body, piston main body is the hollow circular cylinder of bottom opening, hollow circular cylinder bottom can be connected with the push rod of syringe, the top of hollow circular cylinder and top land form piston retraction chamber, it is characterized in that, piston main body outside is provided with sealing ring, top land is the conical structure of thin-walled, and the top edge of top land conical surface end and piston main body top seal ring forms the plane boss of an annular.
2. piston for injector according to claim 1, it is characterized in that: piston main body outer surface is provided with three sealing rings, the first sealing ring is positioned at piston main body bottom, the 3rd sealing ring is piston main body top seal ring, the second sealing ring is between the first sealing ring and the 3rd sealing ring, account for the 1/2-3/4 of the 3rd sealing ring and the first sealing ring spacing, there is piston thread piston main body hollow circular cylinder inside, and piston thread is connected in piston only on injector push-rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410008050.4A CN103656804A (en) | 2014-01-08 | 2014-01-08 | Piston for injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410008050.4A CN103656804A (en) | 2014-01-08 | 2014-01-08 | Piston for injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103656804A true CN103656804A (en) | 2014-03-26 |
Family
ID=50296351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410008050.4A Pending CN103656804A (en) | 2014-01-08 | 2014-01-08 | Piston for injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103656804A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482878A (en) * | 2018-04-25 | 2018-09-04 | 黄志力 | A kind of device that has the beer for performing amusement |
| CN112206366A (en) * | 2020-09-30 | 2021-01-12 | 青岛大学附属医院 | Gynaecology's clinical ultraviolet phototherapy, washing integration equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185001A (en) * | 1993-11-19 | 1995-07-25 | Carl Freudenberg:Fa | Disposable injector |
| CN2279921Y (en) * | 1996-11-28 | 1998-04-29 | 山东东大化学工业(集团)公司橡胶厂 | Rubber piston of syringe |
| US20040127859A1 (en) * | 2002-12-26 | 2004-07-01 | Ward Michael Terrance | Anti-reflux syringe |
| CN201022890Y (en) * | 2007-01-19 | 2008-02-20 | 江西洪达医疗器械集团有限公司 | Low-resistance syringe rubber plug |
| CN202761828U (en) * | 2012-06-29 | 2013-03-06 | 新乡市驼人医疗器械有限公司 | Novel low resistance injector |
| CN103170035A (en) * | 2013-04-03 | 2013-06-26 | 山东威高集团医用高分子制品股份有限公司 | Blood-return-preventing pre-filling pipe-washing syringe |
-
2014
- 2014-01-08 CN CN201410008050.4A patent/CN103656804A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07185001A (en) * | 1993-11-19 | 1995-07-25 | Carl Freudenberg:Fa | Disposable injector |
| CN2279921Y (en) * | 1996-11-28 | 1998-04-29 | 山东东大化学工业(集团)公司橡胶厂 | Rubber piston of syringe |
| US20040127859A1 (en) * | 2002-12-26 | 2004-07-01 | Ward Michael Terrance | Anti-reflux syringe |
| CN201022890Y (en) * | 2007-01-19 | 2008-02-20 | 江西洪达医疗器械集团有限公司 | Low-resistance syringe rubber plug |
| CN202761828U (en) * | 2012-06-29 | 2013-03-06 | 新乡市驼人医疗器械有限公司 | Novel low resistance injector |
| CN103170035A (en) * | 2013-04-03 | 2013-06-26 | 山东威高集团医用高分子制品股份有限公司 | Blood-return-preventing pre-filling pipe-washing syringe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108482878A (en) * | 2018-04-25 | 2018-09-04 | 黄志力 | A kind of device that has the beer for performing amusement |
| CN112206366A (en) * | 2020-09-30 | 2021-01-12 | 青岛大学附属医院 | Gynaecology's clinical ultraviolet phototherapy, washing integration equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2012083179A3 (en) | Plunger packing with wedge seal having extrusion recess | |
| CN103656804A (en) | Piston for injector | |
| CN202982804U (en) | Low-resistance injector | |
| CN204300028U (en) | A kind of correction oil cylinder | |
| AR091366A1 (en) | DISPOSABLE SYRINGE AND PUSH BAR FOR THE SAME | |
| CN203694275U (en) | Piston for injection syringe | |
| CN204840538U (en) | Injection with low resistance | |
| AR118669A1 (en) | FLEXIBLE MANIFOLD FOR ALTERNATIVE PUMP | |
| CN204395142U (en) | A kind of type self-destroyed bilayer engaging syringe of pulling back safely | |
| CN205055075U (en) | Low -resistance syringe | |
| CN104906665A (en) | Low-resistance injector | |
| CN204840529U (en) | Low resistance electron injector | |
| CN102631731A (en) | Low-resistance syringe | |
| CN204619057U (en) | A kind of low resistance syringe piston and syringe | |
| CN204193222U (en) | Medical composite material piston | |
| CN202031915U (en) | Double-acting multistage hydraulic cylinder | |
| CN105521540B (en) | A kind of injection with low resistance | |
| CN214105485U (en) | Low-resistance syringe rubber plug | |
| CN204641154U (en) | Replaceable nib refill of gel-ink pen | |
| CN204025648U (en) | Small-sized oil hydraulic cylinder piston assembly | |
| CN218652658U (en) | High leakproofness syringe | |
| CN203223262U (en) | Novel valve tappet for engine | |
| CN206299528U (en) | A kind of new repetition pumping liquid oil pressure pump | |
| CN203227096U (en) | Prefilled flushing syringe | |
| CN203842039U (en) | Medical low-resistance medicine dispensing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |
|
| RJ01 | Rejection of invention patent application after publication |