CN100493638C - Disposable syringe and its usage - Google Patents
Disposable syringe and its usage Download PDFInfo
- Publication number
- CN100493638C CN100493638C CNB2007101229569A CN200710122956A CN100493638C CN 100493638 C CN100493638 C CN 100493638C CN B2007101229569 A CNB2007101229569 A CN B2007101229569A CN 200710122956 A CN200710122956 A CN 200710122956A CN 100493638 C CN100493638 C CN 100493638C
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- China
- Prior art keywords
- syringe
- piston
- needle
- rear end
- push rod
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- 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
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Abstract
The disposable syringe consists of one syringe needle, one needle cylinder with one nipple connected to the front end, one piston and one push rod connected to the piston. It features the syringe needle, which has a central hole, a middle part fixed inside the nipple, an front end exposed beyond the needle cylinder, a rear part inside the needle cylinder and with a barb and a third hole.
Description
Technical field
The present invention relates to a kind of mode medium is introduced intravital device, particularly relate to the Dispoable medical syringe with subcutaneous injection, intravenous injection or intramuscular injection.
Background technology
Along with disposable syringe is used more and more widely, discarded syringe caused to people's injury and also more and more serious to the pollution problem of environment.The used syringe of those epidemic victims that go out of use, the used syringe of junkie, particularly autoinfection has the used syringe of junkie of serious infectious disease or AIDS, if by the lawless person reclaim washing back repack sell will serious harm consumer healthy, bring irreparable damage to consumer, very cause and seize their the most valuable life.
Fig. 1 is disposable syringe commonly used, this disposable syringe is made up of syringe needle 14, syringe 12, piston 13, push rod 11, suit is connecting syringe needle 14 on the nipple 15 of syringe 12 front ends, push rod 11 front ends are connected with piston 13, push rod 11 is moved forward and backward, realize the extraction and the injection of liquid medicine.Piston 13 is a gum elastic, push rod 11 front ends embed piston 13, do the time spent as bigger external force, push rod 11 front ends can be extracted from piston 13, and in general injection, when taking out liquid medicine, because the external force effect is smaller, push rod 11 front ends can not separate with piston 13, and push rod 11 front ends are extracted from piston 13.Owing to can not whether use from obviously identifying disposable syringe in appearance, so can not effectively stop the repeated use of those used syringes.
Summary of the invention
Purpose of the present invention will provide a kind of disposable syringe to make disposable syringe in the first back outward appearance of using obvious change can take place exactly, prevent to reuse with the prompting people, make disposable syringe produce self-destruction, to reach the purpose that can't reuse in the first back of using.
For this reason, the present invention adopts following technical scheme:
A kind of disposable syringe, form by syringe needle, syringe, piston, push rod, the push rod front end is connected with piston, the syringe front end connects nipple, it is characterized in that syringe needle is that the needle point at hollow and two ends has pin hole, and the mid portion of syringe needle is fixed on the inside of the nipple of disposable syringe, the fore-end of syringe needle is exposed at the syringe outside, the rear end part of syringe needle is positioned at the inside of injector syringe, and the rear end part of syringe needle has barb, and barb is positioned at the back of the needle point of syringe needle rear end part; One the 3rd pin hole is set on the rear end part of syringe needle, and the 3rd pin hole is positioned at that end that the rear end part of syringe needle contacts with nipple, and the interval between the 3rd pin hole and the barb is slightly larger than the thickness of piston, makes piston can place interval between the 3rd pin hole and the barb.
Described disposable syringe, can further make the external edge edge of the rear end of syringe have catch ring, the thrust applying unit of push rod is circular, the edge part of the thrust applying unit of push rod is provided with a hinge means, hinge means connects a countercheck rod, countercheck rod can rotate around hinge means, countercheck rod is paralleled or vertical with syringe, and the length of countercheck rod is more than or equal to the length of the rear end part of syringe needle.
Described disposable syringe can further be provided with labelling on push rod, when labelling arrived catch ring, piston was parked in the front of the needle point of syringe needle rear end part.
The present invention also provides the using method of using above-mentioned disposable syringe.
Description of drawings
Fig. 1 is a disposable syringe sketch map in the prior art;
Fig. 2 is a disposable syringe sketch map of the present invention;
Fig. 3 is the sketch map behind the disposable syringe injection liquid medicine of the present invention;
Fig. 4 disposable syringe of the present invention uses the back to produce the sketch map of self-destruction.
The specific embodiment
Fig. 2 is a disposable syringe sketch map proposed by the invention.Syringe needle is a hollow, and the needle point 271,272 at its two ends has pin hole.The mid portion 22 of syringe needle is fixed on the inside of the nipple 15 of disposable syringe, and the fore-end 21 of syringe needle is exposed at the syringe outside, and the rear end part 23 of syringe needle is positioned at the inside of injector syringe 12.The rear end part 23 of syringe needle has barb 28, and barb 28 is positioned at the back of needle point 272.One the 3rd pin hole, 273, the three pin holes 273 are set on the rear end part 23 of syringe needle are positioned at the rear end part 23 of syringe needle mid portion 22 those ends near syringe needles, promptly the 3rd pin hole 273 is positioned at that end that the rear end part 23 of syringe needle contacts with nipple.The connecting portion of nipple and syringe 12 generally is positioned at the edge of the front end 16 of syringe 12.Interval between the 3rd pin hole 273 and the barb 28 is slightly larger than the thickness of piston 13.For example can make be spaced apart 1.1 centimetres between the 3rd pin hole 273 and the barb 28, the thickness of piston 13 is 1 centimetre.Above-mentioned numeral is illustrative rather than for restriction.Present technique field personnel should be understood that " bigger " narration is clearly, and its purpose is exactly in order to make piston 13 can place interval (as shown in Figure 3) between the 3rd pin hole 273 and the barb 28 in the present invention.Present technique field personnel should be understood that syringe needle rear end part 23 length shown in Figure 2 are exemplary, and in practice, the position of barb 28 is closely to link to each other with the position of needle point 272, and barb 28 can be positioned at identical position with needle point 272.
The external edge of the rear end of syringe 12 is along having catch ring 24, and this is the conventional design of syringe of the prior art, and this is for the ease of injection, no longer carefully states at this.The thrust applying unit 29 of push rod 11 is generally circle, in the edge of thrust applying unit 29 part one hinge means 26 is set, and hinge means 26 connects a countercheck rod 25, and countercheck rod 25 can be around hinge means 26 rotations, countercheck rod 25 is paralleled or vertical with syringe 12.The length of countercheck rod 25 is more than or equal to the length of the rear end part 23 of syringe needle.
Under situation as shown in Figure 2, when countercheck rod 25 parallels with syringe 12, countercheck rod 25 with can limit push rod 11 after the catch ring 24 of syringe 12 contacts and promote pistons 13 to the motion of syringe needle direction, thereby prevent that needle point 272 from stinging piston 13; Under situation as shown in Figure 3, when countercheck rod 25 and syringe 12 are perpendicular, countercheck rod 25 does not contact with the catch ring 24 of syringe 12, push rod 11 promotes piston 13 is not subjected to influence from countercheck rod 25 to the motion of syringe needle direction, under thrust, needle point 272 pierces through piston 13, is stopped by the front end 16 of syringe 12 up to piston 13, and thrust applying unit 29 also arrives catch ring 24 at this moment.
Describe the use of disposable syringe of the present invention down below in detail.Generally in two steps, the first step is that liquid medicine is drawn in the injector syringe 12 when injection; Second step was that the mode of the liquid medicine in the syringe with subcutaneous injection, intravenous injection or intramuscular injection is expelled in the body.
When the first step is operated, as shown in Figure 2, countercheck rod 25 is paralleled with syringe 12, and apply strength in the thrust applying unit 29 of push rod 11, piston 13 is promoted to the syringe needle direction; When countercheck rod 25 with after the catch ring 24 of syringe 12 contacts, can stop that push rod 11 promotes pistons 13 and continues to the motion of syringe needle direction, stop to promote push rod 11 this moment, makes piston 13 be parked in needle point 272 fronts, prevents that needle point 272 from stinging piston 13.Also can labelling 20 be set on push rod 11, as red lines, kick etc., when labelling 20 arrived catch ring 24, piston 13 was parked in needle point 272 fronts, reminded the injector operations personnel, stung piston 13 to prevent needle point 272.Also countercheck rod 25, labelling 20 can be set simultaneously, prevent that needle point 272 from stinging piston 13.Then the fore-end 21 with syringe needle stretches in the liquid medicine, and thrust applying unit 29 past the pulling back with push rod 11 make piston 13 syringe needle direction motion dorsad, thereby liquid medicine is drawn in the injector syringe 12.
When operating, as shown in Figure 3, make countercheck rod 25 and syringe 12 perpendicular, and apply strength, piston 13 is promoted to the syringe needle direction, realize injection in the thrust applying unit 29 of push rod 11 in second step.This moment, countercheck rod 25 did not contact with the catch ring 24 of syringe 12, push rod 11 promotes piston 13 is not subjected to influence from countercheck rod 25 to the motion of syringe needle direction, under thrust, needle point 272 thrusts piston 13, liquid medicine in the syringe 12 is exported and is injected in the body from pin hole 273 at this moment, pierces through piston 13 up to needle point 272.Then barb 28 also passes piston 13, piston 13 is stopped by the front end 16 of syringe 12, thrust applying unit 29 also arrives catch ring 24 and lumps together with catch ring 24 simultaneously, thereby all be expelled to body in the mode of subcutaneous injection, intravenous injection or intramuscular injection the liquid medicine in the syringe, because stopping of thrust applying unit 29, the micro-liquid medicine that penetrates from needle point 272 when needle point 272 pierces through piston 13 can not be splashed to operator's hands.
Piston 13 is a gum elastic, push rod 11 front ends are embedded into piston 13, therefore when the thrust applying unit 29 of push rod 11 when pulling back, owing to stopping of barb 28, the front end of push rod 11 will be extracted from piston 13, and piston 13 is stayed in the interval between the 3rd pin hole 273 and the barb 28.
As from the foregoing, disposable syringe of the present invention will be stayed in the syringe at the first back piston that uses, because piston will be between the pin hole on the 3rd pin hole 273 and the needle point 272, the 3rd pin hole 273 is communicated with pin hole on the needle point 272, will not be difficult to piston is taken out if do not damage syringe.Therefore obvious change can take place in the first back outward appearance of using in disposable syringe of the present invention, can point out people to prevent to reuse, and makes disposable syringe produce self-destruction in the first back of using, and has reached the purpose that can't reuse.
Claims (5)
1. disposable syringe, comprise syringe needle, syringe, piston, push rod, the push rod front end is connected with piston, the syringe front end connects nipple, it is characterized in that syringe needle is that the needle point at hollow and two ends has pin hole, the mid portion of syringe needle is fixed on the inside of the nipple of disposable syringe, and the fore-end of syringe needle is exposed at the syringe outside, the rear end part of syringe needle is positioned at the inside of injector syringe, and the rear end part of syringe needle has barb; One the 3rd pin hole is set on the rear end part of syringe needle, and the 3rd pin hole is positioned at that end that the rear end part of syringe needle contacts with nipple; Barb is between the needle point and described the 3rd pin hole of syringe needle rear end part, and the interval between the 3rd pin hole and the barb is slightly larger than the thickness of piston, makes piston can place interval between the 3rd pin hole and the barb.
2. disposable syringe as claimed in claim 1, the external edge edge that it is characterized in that the rear end of syringe has catch ring, the edge part of the thrust applying unit of push rod is provided with a hinge means, hinge means connects a countercheck rod, countercheck rod can rotate around hinge means, make countercheck rod and syringe axially parallel or vertical, the length of countercheck rod is more than or equal to the length of the rear end part of syringe needle.
3. disposable syringe as claimed in claim 2, the thrust applying unit that it is characterized in that push rod is for circular.
4. disposable syringe as claimed in claim 2 is characterized in that being provided with labelling on push rod, when labelling arrived catch ring, piston was parked in the back of the needle point of syringe needle rear end part.
5. disposable syringe as claimed in claim 3 is characterized in that being provided with labelling on push rod, when labelling arrived catch ring, piston was parked in the back of the needle point of syringe needle rear end part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101229569A CN100493638C (en) | 2007-07-06 | 2007-07-06 | Disposable syringe and its usage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101229569A CN100493638C (en) | 2007-07-06 | 2007-07-06 | Disposable syringe and its usage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101066485A CN101066485A (en) | 2007-11-07 |
| CN100493638C true CN100493638C (en) | 2009-06-03 |
Family
ID=38879264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101229569A Expired - Fee Related CN100493638C (en) | 2007-07-06 | 2007-07-06 | Disposable syringe and its usage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100493638C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510762B (en) * | 2009-09-23 | 2015-08-12 | 赛诺菲-安万特德国有限公司 | For assembly and the delivery device of delivery device |
| US10857289B2 (en) * | 2012-07-25 | 2020-12-08 | Preci Health Sa | Fluid dispenser |
| MX2022000145A (en) * | 2019-07-08 | 2022-02-17 | Braun Melsungen Ag | Hybrid safety spring clip for sharp medical devices and related methods. |
-
2007
- 2007-07-06 CN CNB2007101229569A patent/CN100493638C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101066485A (en) | 2007-11-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20090603 Termination date: 20100706 |