CN104888313A - Low-resistance injector - Google Patents
Low-resistance injector Download PDFInfo
- Publication number
- CN104888313A CN104888313A CN201510363556.1A CN201510363556A CN104888313A CN 104888313 A CN104888313 A CN 104888313A CN 201510363556 A CN201510363556 A CN 201510363556A CN 104888313 A CN104888313 A CN 104888313A
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- China
- Prior art keywords
- piston
- air chamber
- push rod
- injection
- injector
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a low-resistance injector which comprises an injector sleeve, a push rod and a piston. An upper protruding lip and a lower protruding lip are arranged on the outer surface of the piston, the lips are tightly in contact with the inner side of the injector sleeve, a semi-closed hollow air chamber is formed in the piston, the position of the hollow air chamber corresponds to the lower lip, and the piston body between the air chamber and the lower lip is of a thin-walled structure. The piston is in tight threaded connection with the push rod, and the front end of the push rod and the air chamber jointly form a full-closed cavity. The low-resistance injector utilizes pressure in the cavity of the injector to change contact force between the thin-walled structure of the piston and the injector sleeve so as to aquatically adjust injection resistance and achieve the effects of resistance reduction and sealing enhancement.
Description
Technical field
The present invention relates to medical apparatus field, be specifically related to a kind of structure improved syringe.
Background technology
Syringe is a kind of common medical apparatus and instruments, is generally made up of overcoat, piston and core bar.In order to prevent syringe from revealing, between general piston and overcoat, take interference fit.This just causes syringe and in use has very large resistance, adds the working strength of nurse.Notification number is that the Chinese invention patent of CN100435871 discloses a kind of injection with low resistance, comprise injection stack shell and slide in stack shell push away fluid column plug, piston is O-ring seal, and the end face of sealing ring is provided with a circle open slot along its circumferencial direction; Piston fixing device has the gomphosis part be arranged on above sealing ring and the support component be arranged on below sealing ring, correct the flange be embedded in sealing ring end face open slot under the edge of gomphosis part is provided with a circle, sealing ring is fixed on below gomphosis part by support component; Adopt the syringe of this structure, sealing ring can squeeze swell with the change of cylindrical shell inner air pressure or resilience is reduced, contact surface between it and injection cylinder inwall will change with the change of cylindrical shell inner air pressure, syringe piston is made with this kind of sealing ring, its sensitivity is higher, cylinder internal pressure one changes, and sealing ring will squeeze swell or resilience is reduced, thus reaches the object of lower resistance, strong sealing; Piston due to this syringe adopts the circle open slot on it and a gomphosis part to realize, gomphosis part also inwardly struts while outwards being strutted by piston, the endoporus of piston is made to tighten periphery at push rod, therefore, the syringe of this piston structure can be locked with piston fastening when push rod pulls, inserts also no longer makes piston outwards strut, and can not reach the sealing with stack shell.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of good airproof performance, reduce the injection with low resistance of push-and-pull resistance simultaneously.
The present invention is achieved by the following technical programs:
A kind of injection with low resistance, comprises syringe jacket, push rod and piston, it is characterized in that, outer surface of piston is provided with the outstanding lip limit of upper and lower two circles, close contact inside lip limit and syringe jacket; Internal piston is provided with a semi-enclosed hollow air chamber, and hollow air chamber position is corresponding with lower circle lip limit, and the piston body between air chamber and lower circle lip limit is thin-wall construction; By screw thread compact siro spinning technology between piston and push rod, push rod front end and air chamber form totally enclosed cavity jointly.
Top land is conical structure.
Thin-wall construction can produce deformation with the change of injection cavity internal pressure.
Beneficial effect of the present invention is, when syringe slowly promotes or take out medicine action, injection cavity inner liquid medicine pressure is less, and pressure differential is little between air chamber; thin-wall construction does not produce deformation; therefore the resistance that produces in push-and-pull process of syringe is less, can alleviate the labor intensity of medical personnel; When syringe needs to promote or need high-pressure injection fast, injection cavity inner liquid medicine pressure becomes large, and pressure differential increases between air chamber; thin-wall construction produces deformation; cause piston axial dimension to reduce; radial dimension increases, the contact force between inside piston and overcoat and contact area all increase, thus play reinforced seal and prevent the effect of high-pressure injection medicinal liquid leakage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the principle schematic of the present invention when working.
In figure: 1, outer taper; 2, overcoat cone section; 3, cavity is injected; 4, piston; 5, thin-wall construction; 6, air chamber; 7, screw thread; 8, push rod; 9, syringe jacket.
Specific embodiments
Embodiment 1, a kind of injection with low resistance, as shown in Figure 1, 2, comprises syringe jacket 9, push rod 8 and piston 4, it is characterized in that, piston 4 outer surface is provided with the outstanding lip limit of upper and lower two circles, close contact inside lip limit and syringe jacket 9; Piston 4 inside is provided with a semi-enclosed hollow air chamber 6, and hollow air chamber position is corresponding with lower circle lip limit, and the piston body between air chamber 6 and lower circle lip limit is thin-wall construction 5; By screw thread 7 compact siro spinning technology between piston 4 and push rod 8, push rod 8 front end and air chamber 6 form totally enclosed cavity jointly.
Piston 4 top is conical structure.
Thin-wall construction 5 can produce deformation with pressure change in injection cavity 3.
When syringe needs to promote or need high-pressure injection fast, injection cavity 3 inner liquid medicine pressure becomes large, and pressure differential increases between air chamber 6; thin-wall construction 5 produces deformation; cause piston 4 axial dimension to reduce; radial dimension increases, the contact force between inside piston 4 and overcoat 9 and contact area all increase, thus play reinforced seal and prevent the effect of high-pressure injection medicinal liquid leakage.
When syringe slowly promotes or take out medicine action, injection cavity 3 inner liquid medicine pressure is less, and between air chamber 6, pressure differential is little, and thin-wall construction 5 does not produce deformation, therefore the resistance that produces in push-and-pull process of syringe is less, can alleviate the labor intensity of medical personnel.
Claims (3)
1. an injection with low resistance, comprises syringe jacket, push rod and piston, it is characterized in that, outer surface of piston is provided with the outstanding lip limit of upper and lower two circles, close contact inside lip limit and syringe jacket; Internal piston is provided with a semi-enclosed hollow air chamber, and hollow air chamber position is corresponding with lower circle lip limit, and the piston body between air chamber and lower circle lip limit is thin-wall construction; By screw thread compact siro spinning technology between piston and push rod, push rod front end and air chamber form totally enclosed cavity jointly.
2. a kind of injection with low resistance according to claim 1, is characterized in that, top land is conical structure.
3. a kind of injection with low resistance according to claim 1, is characterized in that, thin-wall construction can produce deformation with the change of injection cavity internal pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363556.1A CN104888313A (en) | 2015-06-29 | 2015-06-29 | Low-resistance injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363556.1A CN104888313A (en) | 2015-06-29 | 2015-06-29 | Low-resistance injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104888313A true CN104888313A (en) | 2015-09-09 |
Family
ID=54021544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510363556.1A Pending CN104888313A (en) | 2015-06-29 | 2015-06-29 | Low-resistance injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104888313A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521540A (en) * | 2016-02-26 | 2016-04-27 | 杭羽扬 | Low-resistance injector |
| CN105709310A (en) * | 2016-04-07 | 2016-06-29 | 广西华度医用器材有限公司 | Low-resistance injector |
| CN111888575A (en) * | 2020-08-05 | 2020-11-06 | 翟万田 | Medical injection syringe for hematology department |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201076649Y (en) * | 2007-06-27 | 2008-06-25 | 林军华 | Syringe plug |
| CN201441705U (en) * | 2009-04-01 | 2010-04-28 | 湖南平安医疗器械有限公司 | Low-resistance syringe plunger |
| CN201505343U (en) * | 2009-08-28 | 2010-06-16 | 沈立秋 | rubber piston |
| CN201543050U (en) * | 2009-10-16 | 2010-08-11 | 黄文林 | Low residual injector piston |
| CN201558384U (en) * | 2009-10-16 | 2010-08-25 | 黄文林 | Piston for low positive pressure type injector |
| CN202620377U (en) * | 2012-05-25 | 2012-12-26 | 山东新华安得医疗用品有限公司 | Low-resistance injector |
| CN203227096U (en) * | 2013-04-03 | 2013-10-09 | 山东威高集团医用高分子制品股份有限公司 | Prefilled flushing syringe |
| CN204840520U (en) * | 2015-06-29 | 2015-12-09 | 山东威高集团医用高分子制品股份有限公司 | Injection with low resistance |
-
2015
- 2015-06-29 CN CN201510363556.1A patent/CN104888313A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201076649Y (en) * | 2007-06-27 | 2008-06-25 | 林军华 | Syringe plug |
| CN201441705U (en) * | 2009-04-01 | 2010-04-28 | 湖南平安医疗器械有限公司 | Low-resistance syringe plunger |
| CN201505343U (en) * | 2009-08-28 | 2010-06-16 | 沈立秋 | rubber piston |
| CN201543050U (en) * | 2009-10-16 | 2010-08-11 | 黄文林 | Low residual injector piston |
| CN201558384U (en) * | 2009-10-16 | 2010-08-25 | 黄文林 | Piston for low positive pressure type injector |
| CN202620377U (en) * | 2012-05-25 | 2012-12-26 | 山东新华安得医疗用品有限公司 | Low-resistance injector |
| CN203227096U (en) * | 2013-04-03 | 2013-10-09 | 山东威高集团医用高分子制品股份有限公司 | Prefilled flushing syringe |
| CN204840520U (en) * | 2015-06-29 | 2015-12-09 | 山东威高集团医用高分子制品股份有限公司 | Injection with low resistance |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521540A (en) * | 2016-02-26 | 2016-04-27 | 杭羽扬 | Low-resistance injector |
| CN105521540B (en) * | 2016-02-26 | 2018-11-13 | 杭羽扬 | A kind of injection with low resistance |
| CN105709310A (en) * | 2016-04-07 | 2016-06-29 | 广西华度医用器材有限公司 | Low-resistance injector |
| CN105709310B (en) * | 2016-04-07 | 2021-12-31 | 广西华度医用器材有限公司 | Low-resistance syringe |
| CN111888575A (en) * | 2020-08-05 | 2020-11-06 | 翟万田 | Medical injection syringe for hematology department |
| CN111888575B (en) * | 2020-08-05 | 2021-05-04 | 靳秋玲 | Medical injection syringe for hematology department |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150909 |