CN2841030Y - Low-resistance syringe piston - Google Patents
Low-resistance syringe piston Download PDFInfo
- Publication number
- CN2841030Y CN2841030Y CN 200520014796 CN200520014796U CN2841030Y CN 2841030 Y CN2841030 Y CN 2841030Y CN 200520014796 CN200520014796 CN 200520014796 CN 200520014796 U CN200520014796 U CN 200520014796U CN 2841030 Y CN2841030 Y CN 2841030Y
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- China
- Prior art keywords
- sealing ring
- piston
- seal
- injection
- low resistance
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- Expired - Fee Related
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Abstract
The utility model discloses a low resistance syringe piston. It features in that: the piston is an o-ring seal; the end surface of the seal is equipped with a round of open slot along the circumferential direction. To use this seal as the syringe piston is that the seal is equipped with the round of open slot and the seal can be enlarged by squeezing or contracted by rebounding along with altering the air pressure in a tube body so the contact portion between the seal and the inner wall of the injection tube body can be altered along with altering the air pressure in the tube body. As compared to the existing syringe piston, the sensibility of this piston is higher and the pressure of the tube body is altered so that the seal will be enlarged by squeezing or contracted by rebounding. Therefore, the features ensure the sealing between the seal and the inner wall of the injection tube body without leakage and meanwhile, the features reduce the drag friction at best created by the seal squeezing the inner wall of the injection tube body, so that the purposes of low resistance and strong sealing are obtained.
Description
Technical field
This utility model relates to a kind of syringe piston, particularly a kind of a kind of injection with low resistance piston that can reduce frictional resistance between piston and the injector syringe.
Background technology
Piston is indispensable parts in the syringe, in order to prevent piston leakage on every side, obtain a good leakproof seal effect, piston must compress cylinder inboard wall, if cylinder inboard wall is smooth inadequately, piston just is difficult to move in cylindrical shell, and the operator must just can make piston move with bigger power, the problem of frictional resistance between the piston that how to reduce the injector cartridge inwall and slide within it becomes a great problem that present syringe piston structure designs.
Prior art makes and with lubricator reduces frictional resistance between piston and the cylinder inboard wall, a kind of lubricant that generally uses is silicone oil, but use this lubricant and be out of favour, because this lubricant is understood disperse or is dissolved in the medicinal liquid, thereby medicinal liquid is polluted, therefore people once attempted exploring not with lubricator and syringe piston still can leakproof and method that piston is slided easily, this trial comprises uses various piston profile, for example: Chinese patent 20042004059.2 (notification number: CN2708918Y, the day for announcing: on March 2nd, 2005), disclosing a kind of name is called: " a kind of injector rubber piston ", its main body of this kind piston is cylinder, the outside is provided with three all ring-type boss, the top is a flat-top, and inside is the cascade ring cavity, but this syringe can not be with the tightness between automatic regulating piston of the variation of cylinder internal pressure and barrel, can not effectively reduce the frictional resistance between piston and the barrel, not reach comparatively ideal effect.
Summary of the invention
Technical problem to be solved in the utility model is: the frictional resistance between a kind of energy minimizing and the injection tube inwall is provided, still can keeps the injection with low resistance piston with the cylinder inboard wall sealing simultaneously.
In order to solve above-mentioned technical problem, this utility model adopts following technical scheme: a kind of injection with low resistance piston is characterized in that: described piston is O-ring seal, and the end face of sealing ring is circumferentially with a circle open slot along it.
Adopt this kind sealing ring to make syringe piston, because of being provided with a circle open slot in the sealing ring, sealing ring can squeeze to hold and rise big or resilience is dwindled with the change of cylindrical shell inner air pressure, contact surface between it and injection cylinder inwall will change with the change of cylindrical shell inner air pressure, compare with existing syringe piston, its sensitivity is higher, cylinder internal pressure one changes, sealing ring will squeeze to open and rise big or resilience is dwindled, sealing ring and injection cylinder inner wall sealing had both been guaranteed, do not leak, reduce again simultaneously as far as possible sealing ring because of be squeezed and the injection cylinder inwall between the frictional resistance that produces, thereby reach lower resistance, the purpose of strong sealing.
As a kind of preferred structure of the present utility model, the longitudinal section of sealing ring open slot is V-shaped, the sealing ring of this kind structure resilience after crowded opening is stronger, the pressure-dependent sensitivity of sealing ring is improved, the longitudinal section of sealing ring is right-angled trapezium wide at the top and narrow at the bottom, the sealing ring and the contact surface between the cylinder inboard wall of this shape are less, and frictional resistance between the two is also less accordingly.
Further improve as this utility model, the bottom surface of sealing ring is circumferentially with a circle open slot along it, the sealing ring of this kind structure, sealing ring tow sides are equipped with a circle open slot, can remedy the sealing ring that has only one side to establish open slot, the insufficient problem of sealing ring size adjustment degree when last pushing away, no matter thereby to accomplish to push away on being or drop-down, the sealing circle can both play regulating action, makes the sensitivity of sealing ring higher, play the effect of two-ways regulation, and arrive the purpose of lower resistance, strong sealing.
Description of drawings
Fig. 1 is a vertical view of the present utility model.
Fig. 2 is the zoomed-in view of first kind of sealing ring longitudinal section.
Fig. 3 is the zoomed-in view of second kind of sealing ring longitudinal section.
The specific embodiment
Fig. 1 is a vertical view of the present utility model, the O-ring seal (1) of this piston for making as we know from the figure by flexible material, the longitudinal section of sealing circle (1) preferably is right-angled trapezium (as shown in Figure 2) wide at the top and narrow at the bottom, contact surface between the sealing ring of this shape and the injection cylinder inwall is less, frictional resistance between the two is also less accordingly, the end face of sealing circle is provided with the open slot (2) that along the circumferential direction extends, the longitudinal section of sealing circle open slot can be the V-arrangement like shears mouth sample, also can be semicircle, U-shaped, when the longitudinal section of open slot (2) is V-arrangement by contrast, the resilience force of sealing ring is stronger, preferred V-arrangement.
Make syringe piston with this kind sealing ring, when resting state, the contact surface of sealing ring and injection cylinder inwall is a minima, following pulling-pushing rod suction medicinal liquid, produce negative pressure in the cylindrical shell, the attraction sealing ring moves upward, and the opening of sealing ring is squeezed to be opened, and sealing ring rises greatly, and contact surface strengthens between injection cylinder, sealing is strengthened, and syringe can not leaked, with reducing of negative pressure value because of the change of barrel pressure, sealing ring moves downward, the sealing ring resilience, and contact surface reduces between the injection cylinder inwall, and the frictional resistance between the injection cylinder inwall reduces.On push rod, sealing ring is subjected to the extruding of air in the cylindrical shell, the opening of sealing ring is squeezed to be opened, sealing ring rises greatly, and contact surface strengthens between the injection cylinder inwall, sealing is strengthened, reduce with the cylindrical shell inner air pressure, the sealing ring resilience, and contact surface reduces between the injection cylinder inwall, and the frictional resistance between the injection cylinder inwall reduces, make syringe piston with this kind sealing ring, compare with existing syringe piston, the contact surface between it and injection cylinder inwall can change with the change of cylindrical shell inner air pressure, its sensitivity is higher, cylinder internal pressure one changes, and sealing ring will squeeze to open and rise big or resilience is dwindled, and has both guaranteed sealing ring and injection cylinder inner wall sealing, do not leak, reduce again simultaneously as far as possible sealing ring because of be squeezed and the injection cylinder inwall between the frictional resistance that produces, thereby this reach lower resistance, the purpose of strong sealing.
For the sensitivity that sealing ring is regulated is strengthened, the bottom surface, longitudinal section of sealing ring (1) preferably also is provided with a circle open slot (3) along its circumferencial direction, the longitudinal section of sealing ring (1) is the rectangle of the gap that is combined into of two right-angled trapezium along continuous straight runs symmetries, this kind structure, can remedy the sealing ring that has only end face to establish open slot, the insufficient problem of sealing ring size adjustment degree when on push rod, pushing away, no matter this syringe is pushed away on being or drop-down, the sealing circle can both play regulating action, make the sensitivity of sealing ring higher, play the effect of two-ways regulation, and arrive lower resistance, the purpose of strong sealing.
This utility model compared with prior art, processing technique is simple, be easy to make, cost is low, sealing is good, is a kind of ideal syringe piston.
Claims (7)
1, a kind of injection with low resistance piston is characterized in that: described piston is O-ring seal (1), and the end face of sealing ring (1) is circumferentially with a circle open slot (2) along it.
2, a kind of injection with low resistance piston as claimed in claim 1, it is characterized in that: the longitudinal section of described open slot (2) is V-shaped.
3, a kind of injection with low resistance piston as claimed in claim 1 or 2, it is characterized in that: the longitudinal section of described sealing ring (1) is right-angled trapezium wide at the top and narrow at the bottom.
4, a kind of injection with low resistance piston as claimed in claim 1 or 2 is characterized in that: the bottom surface of described sealing ring (1) is circumferentially with a circle open slot (3) along it.
5, as appointing described a kind of injection with low resistance piston in the claim 3, it is characterized in that: the bottom surface of sealing ring (1) is circumferentially with a circle open slot (3) along it.
6, a kind of injection with low resistance piston described in claim 4 is characterized in that: the longitudinal section of described sealing ring (1) is the rectangle of the gap that is combined into of two right-angled trapezium along continuous straight runs symmetries.
7, a kind of injection with low resistance piston described in claim 5 is characterized in that: the longitudinal section of described sealing ring (1) is the rectangle of the gap that is combined into of two right-angled trapezium along continuous straight runs symmetries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520014796 CN2841030Y (en) | 2005-09-09 | 2005-09-09 | Low-resistance syringe piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520014796 CN2841030Y (en) | 2005-09-09 | 2005-09-09 | Low-resistance syringe piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2841030Y true CN2841030Y (en) | 2006-11-29 |
Family
ID=37444937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520014796 Expired - Fee Related CN2841030Y (en) | 2005-09-09 | 2005-09-09 | Low-resistance syringe piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2841030Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941040A (en) * | 2015-07-10 | 2015-09-30 | 常州市盈顺电子有限公司 | Low-resistance electronic injection syringe |
| CN108084653A (en) * | 2016-11-23 | 2018-05-29 | 天津经纬正能电气设备有限公司 | The special compound of dry-type air-core reactor and its container containing |
| CN116496572A (en) * | 2023-05-04 | 2023-07-28 | 宿迁市春明医疗器材有限公司 | Low-resistance sterile dispensing syringe |
-
2005
- 2005-09-09 CN CN 200520014796 patent/CN2841030Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941040A (en) * | 2015-07-10 | 2015-09-30 | 常州市盈顺电子有限公司 | Low-resistance electronic injection syringe |
| CN108084653A (en) * | 2016-11-23 | 2018-05-29 | 天津经纬正能电气设备有限公司 | The special compound of dry-type air-core reactor and its container containing |
| CN116496572A (en) * | 2023-05-04 | 2023-07-28 | 宿迁市春明医疗器材有限公司 | Low-resistance sterile dispensing syringe |
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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: 20061129 Termination date: 20100909 |