CN2370879Y - Disposable syringe - Google Patents
Disposable syringe Download PDFInfo
- Publication number
- CN2370879Y CN2370879Y CN 98250263 CN98250263U CN2370879Y CN 2370879 Y CN2370879 Y CN 2370879Y CN 98250263 CN98250263 CN 98250263 CN 98250263 U CN98250263 U CN 98250263U CN 2370879 Y CN2370879 Y CN 2370879Y
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- CN
- China
- Prior art keywords
- piston rod
- piston
- syringe
- rod
- ing
- 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 - Lifetime
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model relates to a disposable syringe, which is mainly composed of a needle cylinder, a needle head, a piston head, a rubber piston, a piston rod, and a movable ring. By means of the organic cooperation of the piston rod, the movable ring, and the needle cylinder, the condition that injection liquid can be sucked by the piston rod after pulling out for the first time can be realized. After the piston rod can be pushed to complete injection, the piston rod can not be pulled out again. The condition that the syringe can be only used once can be ensured structurally, and thereby, the problem of germ infection caused by the repeated use of the disposable syringe can be prevented.
Description
A kind of disposable syringe belongs to the medical device product category, the particularly design of medical plastic ware and production.
At present the syringe made of the useful quartz glass of domestic and international widely used syringe and with the disposable syringe that plastics etc. are made because disposable syringe need not be sterilized, has prevented antibacterial and virus by the syringe communicate illness, so obtained very fast development.But, the disposable syringe that uses does not have essential distinction with the syringe of tradition use except that making material at present, be that artificial regulation is used once, be not to use once just can not reuse, just because of this, some lawless person reclaims used syringe and sells once more through cleaning treatment with after repacking, and profits from, and therefore causes the incident of disease propagation to happen occasionally.
The purpose of this utility model is: designs a kind of syringe, guarantees can only use once, thoroughly solve the multiplexing once more problem of disposable syringe from structure, thus the disease propagation of stopping to cause therefrom.
This utility model is mainly by syringe, be made up of syringe needle, piston head, rubber piston, piston rod, shift(ing) ring six parts.Syringe is formed by medical plastic blowing, and an end can carry out driving fit by suit with injection needle and dock, and the other end is provided with the ear lip that makes things convenient for injection operation; Rubber piston lateral surface and the driving fit of syringe inwall, middle suit piston head; Piston head is " worker " font, an end suit rubber piston, and an end is connected with piston rod by screw thread; Piston rod one end has the screw thread that is connected with piston head, and the other end is a drawing handle, is convenient to injection operation, and the body of rod of piston rod is provided with agnail, cooperates with shift(ing) ring to realize one-way movement; Shift(ing) ring is certain thickness annulus, lateral surface and the driving fit of syringe inwall, the body of rod of endoporus and piston rod coincide and is provided with the unidirectional reed that echoes mutually with body of rod agnail, make insert behind the piston rod can only positive movement, can not reverse movement.During assembling, suit shift(ing) ring on the termination of piston rod at first, again with an end of piston head by being threaded, the other end suit rubber piston of piston head, adopt assembly tool to push down shift(ing) ring then it is pushed to the syringe bottom, then pyrocondensation is carried out in the syringe precalculated position and handled, syringe needle is installed again and is packed.The production of disposable syringe and assembling are all by country relevant sanitary standard and requirement disinfection and carry out assembly manipulation under gnotobasis.The taking-up disposable syringe of unpacking during use, by pulling piston rod handle suction injection, shift(ing) ring moves with piston rod, after scale sucks injection on request, shift(ing) ring arrives the precalculated position, handled because of pyrocondensation being carried out in the precalculated position, shift(ing) ring can not continue pulling behind this position.During injection, pushing piston bar handle because shift(ing) ring allows the piston rod positive movement, piston rod moves, and shift(ing) ring with the effect of syringe inwall frictional force under still rest on the precalculated position.After injection was finished, piston rod had been pushed into the syringe bottom, and because of shift(ing) ring does not allow reverse movement, piston rod can not be extracted out once more, thereby thoroughly prevent reusing of disposable syringe.
Introduce embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 is a structure chart of the present utility model;
Fig. 2 is the longitudinal sectional view of piston head;
Fig. 3 is the longitudinal sectional view of rubber piston;
Fig. 4 is the longitudinal sectional view of shift(ing) ring;
Fig. 5 is the longitudinal sectional view of piston rod;
Select to meet the plastics of medical standard during production, carry out the processing and fabricating of each parts and disinfect, after this under aseptic condition, assemble according to relevant sanitary standard.Suit shift(ing) ring (2) on the termination of piston rod (1) at first, screw thread (3) by piston rod end is connected with the nut (5) of piston head (4) one ends again, the other end of piston head is by suit mouth (7) the suit rubber piston of rubber piston (6), adopt assembly tool to push down shift(ing) ring (2) and it is pushed to the bottom of syringe (8), then pyrocondensation is carried out in the precalculated position of syringe (8) and handled, syringe needle and packing are installed.At first unpack during use, by pulling piston rod handle (9) suction injection, shift(ing) ring (2) moves to the precalculated position with piston rod (1), and shift(ing) ring can not continue pulling after arriving the precalculated position.During injection, pushing piston bar handle (9), piston rod (1) moves, and shift(ing) ring (2) still rests on the origin-location.After injection is finished, piston rod (1) has been pushed into syringe (8) bottom, because of the unidirectional reed (10) on the shift(ing) ring and the agnail (11) on the piston rod cooperatively interact, does not allow reverse movement, piston rod (1) can not be extracted out once more, thereby thoroughly eradicate reusing of disposable syringe.
Advantage of the present invention is: can guarantee that 1. disposable syringe can only use once; It is 2. simple in structure, Be convenient to processing and assembly manipulation; 3. cost is low, and is easy to utilize.
Claims (2)
1. disposable syringe, mainly form by syringe, syringe needle, rubber piston, piston head, piston rod, it is characterized in that: the front end of piston rod has the screw thread that is connected with piston head, the body of rod of piston rod is provided with agnail and suit one shift(ing) ring, the lateral surface of shift(ing) ring and the driving fit of syringe inwall, endoporus coincide with the body of rod of piston rod and is provided with the unidirectional reed that piston rod body of rod agnail echoes mutually;
2. disposable syringe according to claim 1 is characterized in that: described piston head is " worker " font, and an end suit rubber piston, the other end are nut, can be connected with piston rod by the screw thread of piston rod end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98250263 CN2370879Y (en) | 1998-12-18 | 1998-12-18 | Disposable syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98250263 CN2370879Y (en) | 1998-12-18 | 1998-12-18 | Disposable syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2370879Y true CN2370879Y (en) | 2000-03-29 |
Family
ID=33994790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98250263 Expired - Lifetime CN2370879Y (en) | 1998-12-18 | 1998-12-18 | Disposable syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2370879Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100467080C (en) * | 2002-09-25 | 2009-03-11 | 贝克顿·迪金森公司 | Single use syringe and plunger rod locking device therefor |
| CN104221826A (en) * | 2014-09-01 | 2014-12-24 | 董兰田 | Irrigating device for underground roots of single plantlet in drought region |
| CN108313541A (en) * | 2018-03-22 | 2018-07-24 | 深圳捷创电子科技有限公司 | A kind of automatic syringe-type propeller and its application method |
-
1998
- 1998-12-18 CN CN 98250263 patent/CN2370879Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100467080C (en) * | 2002-09-25 | 2009-03-11 | 贝克顿·迪金森公司 | Single use syringe and plunger rod locking device therefor |
| CN104221826A (en) * | 2014-09-01 | 2014-12-24 | 董兰田 | Irrigating device for underground roots of single plantlet in drought region |
| CN108313541A (en) * | 2018-03-22 | 2018-07-24 | 深圳捷创电子科技有限公司 | A kind of automatic syringe-type propeller and its application method |
| CN108313541B (en) * | 2018-03-22 | 2023-05-12 | 深圳捷创电子科技有限公司 | Automatic needle cylinder type propeller and using method thereof |
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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 | ||
| CX01 | Expiry of patent term |