CN2770678Y - Anchoretform piston needle head retracting safety syringe - Google Patents
Anchoretform piston needle head retracting safety syringe Download PDFInfo
- Publication number
- CN2770678Y CN2770678Y CN 200420054983 CN200420054983U CN2770678Y CN 2770678 Y CN2770678 Y CN 2770678Y CN 200420054983 CN200420054983 CN 200420054983 CN 200420054983 U CN200420054983 U CN 200420054983U CN 2770678 Y CN2770678 Y CN 2770678Y
- Authority
- CN
- China
- Prior art keywords
- anchor
- needle head
- needle
- push rod
- shaped piston
- 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 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- 206010011409 Cross infection Diseases 0.000 abstract description 4
- 206010029803 Nosocomial infection Diseases 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 208000035473 Communicable disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to the technical field of syringes, particularly a safety syringe with an anchor-shaped piston and a retracting needle head. The utility model is provided with a needle head seat, a needle head, a push rod and an outer sleeve, wherein the needle head is arranged on the top end of the needle head seat and is fixedly connected with the needle head seat; the push rod is arranged in the outer sleeve, and the front part of the push rod is provided with an edge groove; the head of the outer sleeve is provided with a cylinder neck, the needle head seat is arranged in the cylinder neck, an outer ring of the needle head seat is provided with a convex annular closed ring, the needle head seat is closely connected with the cylinder neck through the convex annular closed ring, the lower part of the needle head seat is provided with a hole, and the middle part of the inner wall of the hole is provided with a convex annular ring; the top end of the push rod is provided with an anchor-shaped piston, and the head part of the anchor-shaped piston is provided with an anchor-shaped head. The safety syringe with an anchor-shaped piston and a retracting needle head of the utility model has the advantages of simple manufacturing process and low cost; after injection is finished, the needle head contacting a human body can be pulled in the outer sleeve, and the push rod can be conveniently broken for self destruction; the utility model prevents medical staff from being punctured by a needle tip in work and prevents cross infection caused by repeated use.
Description
Technical field
This utility model relates to the injector technology field, especially a kind of anchor shaped piston needle retractable type safety injector.
Background technology
The safety injection seminar of holding in Beijing on April 20th, 2004 at present serious public health phenomenon, is quickened the problem of 100% safety injection has been carried out expert's investigation.The expert has proposed some area and seriously exists and reuse syringe and syringe needle phenomenon without sterilization in the meeting, thereby causes some pernicious infectious diseases to spread with surprising rapidity.In addition, in therapeutic process, the medical worker is also very general by the situation of needle sting.In fact, at present a lot of manufacturers have developed multiple safety self-destructing syringe, but do not have good competitive advantage on market.Because these safety self-destructing syringes become increasingly complex in technology, structure, with material, not only extend manufacture cycle, output does not improve, and cost also occupies relative superiority or inferiority not.
Summary of the invention
In order to overcome the deficiency of existing disposable syringe, the purpose of this utility model provides a kind of processing technology anchor shaped piston needle retractable type safety injector simple, safe in utilization.
The technical scheme that its technical problem that solves this utility model adopts is: a kind of anchor shaped piston needle retractable type safety injector, has needle holder, syringe needle, push rod, overcoat, syringe needle is arranged on the needle holder top, syringe needle is fixedlyed connected with needle holder, push rod is arranged in the overcoat, the front portion of push rod is provided with the rib groove, the overcoat head is provided with a neck, needle holder is arranged in the neck, and the needle holder outer ring is provided with bulge loop shape driving fit circle, and needle holder is connected by the driving fit of bulge loop shape driving fit circle with the tube neck, the needle holder bottom is provided with porose, inwall middle part, hole is provided with protruding annular ring, and the top of push rod is provided with anchor shaped piston, and the anchor shaped piston head is provided with anchor shape head.When anchor shaped piston was advanced to the zero graduation line, anchor shape head also just had been advanced in the protruding annular ring in the needle holder, and the anchor shape head on the injection end rear push-rod hooks the protruding annular ring of needle holder like this, slightly firmly once drawing needle holder safety is retracted in the overcoat; Because the push rod front portion is provided with the rib groove, the push rod that can fracture easily carries out self-destruction.Can prevent that like this medical work personnel from being stabbed by needle point at work, can prevent from again to reuse and cause cross infection.
Further: described anchor shape head lower end is separately anchor stock shape.
Further: the boss width of the protruding annular ring of described needle holder is 0.12cm, highly is 0.03cm.
The beneficial effects of the utility model are, anchor shaped piston needle retractable type safety injector processing technology of the present utility model is simple, cost is low, after injection finishes, the syringe needle of contact human body can be retracted in the overcoat, the push rod that can fracture easily simultaneously carries out self-destruction, prevents that the medical work personnel from being stabbed by needle point at work, can prevent from again to reuse to cause cross infection.
Description of drawings
Below in conjunction with drawings and Examples this utility model is further specified.
Fig. 1 is the structural representation of anchor shaped piston needle retractable type safety injector of the present utility model.
Fig. 2 is an injection done state sketch map of the present utility model.
Fig. 3 retracts overcoat internal state sketch map for syringe needle of the present utility model.
Fig. 4 is the structural representation of the needle holder in this utility model.
Among the figure: 1. syringe needle, 2. push rod, 3. overcoat, a 4. neck, 5. needle holder, 6. protruding annular ring, 7. bulge loop shape driving fit circle, 8. anchor shape head, 9. anchor shaped piston, 10. rib groove.
The specific embodiment
As Fig. 1,2,3, anchor shaped piston needle retractable type safety injector shown in 4, has needle holder 5, syringe needle 1, push rod 2, overcoat 3, syringe needle 1 is arranged on needle holder 5 tops, syringe needle 1 is fixedlyed connected with needle holder 5, push rod 2 is arranged in the overcoat 3, the front portion of push rod 2 is provided with rib groove 10, overcoat 3 heads are provided with a neck 4, needle holder 5 is arranged in the neck 4, needle holder 5 outer rings are provided with bulge loop shape driving fit circle 7, and needle holder 5 is connected by 7 driving fits of bulge loop shape driving fit circle with tube neck 4, and needle holder 5 bottoms are provided with porose, inwall middle part, hole is provided with protruding annular ring 6, the top of push rod 2 is provided with anchor shaped piston 9, and anchor shaped piston 9 heads are provided with anchor shape head 8, and anchor shape head 8 lower ends are separately anchor stock shape, the boss width of the protruding annular ring 6 of needle holder 5 is 0.12cm, highly is 0.03cm.
Needle holder 5 of the present utility model is arranged in the overcoat 3, and the bulge loop shape driving fit circle 7 of needle holder 5 outer rings is combined closely with tube neck 4, and driving fit frictional force reaches 23-25N between tube neck 4 and the needle holder 5, has solved the desired frictional force of puncture force.After anchor shaped piston 9 pushes overcoat 3, anchor shaped piston 9 and overcoat 3 driving fits, because of the slightly larger in diameter of anchor shaped piston 9 in the diameter of overcoat 3, utilize the inherent character of plastics that anchor shaped piston 9 can be free to slide in overcoat 3 and overcoat 3 can not cause the phenomenon of leakage with anchor shaped piston 9 driving fits.During injection, push rod 2 vertical anchor shape heads 8 are when anchor shaped piston 9 is advanced into the zero graduation line forward, and because of anchor shape head 8 lower ends are separately anchor stock shape, because the elasticity of plastics, anchor shape head 8 can be squeezed into needle holder 5 easily, makes it finish injection.Injection finishes, and anchor shape head 8 hooks the protruding annular ring 6 at inwall middle part, needle holder 5 hole, slightly firmly once drawing needle holder 5 and needle safety is retracted in the overcoat 3; Because push rod 2 front portions are provided with rib groove 10, the push rod 2 that can fracture easily makes it thorough self-destruction.Can prevent that like this medical work personnel from being stabbed by needle point at work, can prevent from again to reuse and cause cross infection.
Claims (3)
1, a kind of anchor shaped piston needle retractable type safety injector, has needle holder (5), syringe needle (1), push rod (2), overcoat (3), syringe needle (1) is arranged on needle holder (5) top, syringe needle (1) is fixedlyed connected with needle holder (5), push rod (2) is arranged in the overcoat (3), the front portion of push rod (2) is provided with rib groove (10), overcoat (3) head is provided with a neck (4), needle holder (5) is arranged in the neck (4), it is characterized in that: needle holder (5) outer ring is provided with bulge loop shape driving fit circle (7), needle holder (5) is connected by bulge loop shape driving fit circle (7) driving fit with tube neck (4), needle holder (5) bottom is provided with porose, inwall middle part, hole is provided with protruding annular ring (6), and the top of push rod (2) is provided with anchor shaped piston (9), and anchor shaped piston (9) head is provided with anchor shape head (8).
2, anchor shaped piston needle retractable type safety injector according to claim 1 is characterized in that: described anchor shape head (8) lower end is separately anchor stock shape.
3, anchor shaped piston needle retractable type safety injector according to claim 1, it is characterized in that: the boss width of the protruding annular ring (6) of described needle holder (5) is 0.12cm, highly is 0.03cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420054983 CN2770678Y (en) | 2004-12-18 | 2004-12-18 | Anchoretform piston needle head retracting safety syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420054983 CN2770678Y (en) | 2004-12-18 | 2004-12-18 | Anchoretform piston needle head retracting safety syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2770678Y true CN2770678Y (en) | 2006-04-12 |
Family
ID=36704465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420054983 Expired - Fee Related CN2770678Y (en) | 2004-12-18 | 2004-12-18 | Anchoretform piston needle head retracting safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2770678Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008019544A1 (en) * | 2006-08-07 | 2008-02-21 | Zuoqian Lin | Improved self-destruction syringe |
-
2004
- 2004-12-18 CN CN 200420054983 patent/CN2770678Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008019544A1 (en) * | 2006-08-07 | 2008-02-21 | Zuoqian Lin | Improved self-destruction syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |