CN204840520U - Injection with low resistance - Google Patents
Injection with low resistance Download PDFInfo
- Publication number
- CN204840520U CN204840520U CN201520449759.8U CN201520449759U CN204840520U CN 204840520 U CN204840520 U CN 204840520U CN 201520449759 U CN201520449759 U CN 201520449759U CN 204840520 U CN204840520 U CN 204840520U
- Authority
- CN
- China
- Prior art keywords
- piston
- air chamber
- injection
- lip limit
- push rod
- 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 - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 4
- 241000168254 Siro Species 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 10
- 239000003814 drug Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to an injection with low resistance, including syringe overcoat, push rod and piston, the lip limit of two rings of salients about the piston surface is provided with, lip limit and the inboard in close contact with of syringe overcoat, the piston is inside to be provided with a semi -enclosed hollow air chamber, and hollow air chamber position is corresponding with lower ring of lip limit, and the piston body between air chamber and the lower ring of lip limit is thin walled structure, through screw thread zonulae occludens between piston and the push rod, the fully enclosed cavity is constituteed with the air chamber jointly to the push rod front end, the utility model discloses utilize the pressure size in the syringe cavity, change the contact force between piston thin walled structure and the syringe overcoat to automatically regulated injection resistance size reaches low resistance and strengthens sealed effect.
Description
Technical field
This utility model relates to medical apparatus field, is 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 utility model 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.
Utility model content
For the deficiencies in the prior art, this utility model provides a kind of good airproof performance, reduces the injection with low resistance of push-and-pull resistance simultaneously.
This utility model 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.
The beneficial effects of the utility model are, 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 utility model.
Principle schematic when Fig. 2 is utility model works.
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 |
|---|---|---|---|
| CN201520449759.8U CN204840520U (en) | 2015-06-29 | 2015-06-29 | Injection with low resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520449759.8U CN204840520U (en) | 2015-06-29 | 2015-06-29 | Injection with low resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204840520U true CN204840520U (en) | 2015-12-09 |
Family
ID=54731121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520449759.8U Expired - Fee Related CN204840520U (en) | 2015-06-29 | 2015-06-29 | Injection with low resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204840520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104888313A (en) * | 2015-06-29 | 2015-09-09 | 山东威高集团医用高分子制品股份有限公司 | Low-resistance injector |
-
2015
- 2015-06-29 CN CN201520449759.8U patent/CN204840520U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104888313A (en) * | 2015-06-29 | 2015-09-09 | 山东威高集团医用高分子制品股份有限公司 | Low-resistance injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20180629 |