CN201370854Y - Self-destroying safety injector - Google Patents
Self-destroying safety injector Download PDFInfo
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- CN201370854Y CN201370854Y CN200920113283U CN200920113283U CN201370854Y CN 201370854 Y CN201370854 Y CN 201370854Y CN 200920113283 U CN200920113283 U CN 200920113283U CN 200920113283 U CN200920113283 U CN 200920113283U CN 201370854 Y CN201370854 Y CN 201370854Y
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- self
- needle
- injection
- ring
- needle holder
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Abstract
The utility model provides a self-destroying safety injector which belongs to the technical field of medical instruments and solves the problems that the existing injector has poor self-destroying capacity and low safety factor. The self-destroying safety injector comprises an injection barrel and an injection pole arranged in the injection barrel, wherein a piston which is sleeved on the injection pole is arranged at the front end of the injection pole, a needle holder is arranged at the front end of the injection barrel, the needle holder is fixedly connected with an injection needle which is communicated with the injection barrel, a needle holder ring that extrudes radially is arranged at the rear end of the needle holder, an axial limit ring is arranged in the injection barrel, the outer diameter of the needle holder ring is larger than the inner diameter of the axial limit ring, the needle holder ring leans against the upper end of the axial limit ring, and a top pressure head which can act on the axial limit ring and enable the needle holder ring to pass through the axial limit ring is arranged at the front end of the injection pole when the injection pole is pushed to the front end of the injection barrel. The self-destroying safety injector adopts the top pressure head of the injection pole to extrude the axial limit ring so that the needle holder ring is separated from the axial limit ring and the injection needle can enter into the injection barrel under the action of an elastic element; and meanwhile, the sealing between the axial limit ring and the needle holder ring can not be carried out, thereby the self-destroying of the injector can be realized. The self-destroying safety injector has the advantages of simple self-destroying way as well as safe and convenient use.
Description
Technical field
This utility model belongs to technical field of medical instruments, relates to a kind of syringe, particularly a kind of self-destructing safety insurance syringe.
Background technology
Along with the progress of society, people are more and more higher to the requirement of medical treatment, and medical apparatus and instruments also especially is greatly improved in the improvement aspect the syringe in continuous innovation and improvement.At present, plastic injector for temporary use is used widely, and general disposable syringe is just discarded after using once, thereby can prevent that syringe from reusing and cause viral communication, thereby the safer health of this type of syringe.But, general disposable syringe since Structure Designing Problem must be artificial with its breaking-up, and can not reach self-destruction, so just brought the trouble of using, use and illegal chance of making a profit also for the irregular medical institutions of minority by secondary, also once add simultaneously other people probability of viral communication, threatened people's life and health.
People have designed various self-destruction syringes for this reason, and for example, Chinese patent literature once disclosed a kind of syringe [China Patent No. ZL200320109493.X; Publication number CN2655925Y], comprise injection tube and injection rod, be with rubber stopper on the bar head, the front end of injection tube has needle holder, and through hole is arranged in the needle holder, through hole the inner of needle holder is provided with a plug, plug and injection tube are connected, and a liquid outlet that communicates with through hole is arranged on the plug, at the front end of bar head a stifled cover are housed, stifled cover front central is a cavity, and this cavity has the shape that matches with the plug profile.The stifled cover of the syringe utilization of this structure is blocked the liquid outlet on the plug, makes injection can't pass through liquid outlet, thereby reaches the purpose of self-destruction.Above-mentioned scheme may solve the problem that original syringe can not self-destruction, but because so chamber and plug can not guarantee to cooperate fully self-destruction still thorough inadequately when self-destruction, even plug is blocked liquid outlet can not use, but the syringe needle that is exposed still exists very big potential safety hazard, so because complex structure has in use also brought very big a series of problems such as inconvenience.
Summary of the invention
The purpose of this utility model is to have the problems referred to above at existing technology, has proposed a kind of self-destructing safety reasonable in design, that self-destruction is thorough, safe and convenient to use and has insured syringe.
The purpose of this utility model can realize by following technical proposal: a kind of self-destructing safety insurance syringe, comprise injection tube and be arranged on the interior injection rod of injection tube, front end at injection rod is provided with cover piston thereon, front end at injection tube is equipped with needle holder, this needle holder is connected with entry needle and entry needle is connected with injection tube, it is characterized in that, described needle holder rear end has the needle ring that radially protrudes, be provided with the axial limiting circle in the injection tube, described needle ring external diameter is resisted against axial limiting circle upper end greater than axial limiting circle internal diameter and needle ring, and described injection rod front end has and can act on the axial limiting circle and make needle ring pass the roof pressure head of axial limiting circle when injection rod is pushed into the injection tube front end.
This syringe is in sealing state between axial limiting circle and the needle ring when not using.During use when injection rod being pushed into injection tube foremost the time, the roof pressure head extrusion axis of injection rod can make needle ring move disengaging axial limiting circle backward to spacing collar, then injection rod is pulled back, needle ring drives entry needle and passes axial limiting circle and mobile to the back-end, make it entry needle and fall in the injection tube, thereby reach the purpose of syringe self-destruction.
In above-mentioned self-destructing safety insurance syringe, described injection tube front end has the joint of tubular, the tubular nipple that is connected with it is housed in joint, above-mentioned needle holder is located in the nipple, outside nipple, be with the tubular coupling that is connected with nipple, described nipple rear end has annular convex shoulder, and above-mentioned axial limiting circle is arranged on the annular convex shoulder.This structure fixed needle base can make things convenient for the production and assembly of whole syringe.
In above-mentioned self-destructing safety insurance syringe, also be equipped with in the described nipple and be enclosed within on the needle holder and needle ring is pressed on elastic component on the axial limiting circle, an end of elastic component acts in the coupling, and the other end acts on the needle ring.Under the elastic force effect of elastic component, entry needle can be pushed in the injection tube, thereby the self-destruction of realization syringe avoids the entry needle mistake to stab other people simultaneously.
In above-mentioned self-destructing safety insurance syringe, described needle ring has the tapered portion that is positioned at front end and is connected as a single entity with the columnar portion that is positioned at the rear end and both, the big rear end of the front end of tapered portion is little, and cone abuts is on the axial limiting circle, in the columnar portion insertion axial limiting circle.The tapered portion of needle ring and axial limiting circle are against, visible abutment face and are the conical surface, so this structure has against firmly the advantage of good airproof performance when syringe does not use; In use, the roof pressure head extrusion axis of injection rod can make the easier disengaging axial limiting of needle ring circle to spacing collar.
In above-mentioned self-destructing safety insurance syringe, described roof pressure head ringwise and roof pressure head and injection rod be connected as a single entity.The internal diameter of roof pressure head is slightly larger than the diameter of needle ring front end, guarantees that having the space behind the needle ring disengaging axial limiting circle moves backward.
In above-mentioned self-destructing safety insurance syringe, have the screens circle on the inwall of described injection tube rear end, have the screens sheet that can embed the screens circle on the described injection rod.Injection rod is pulled back, make the screens sheet snap in the screens circle after, this moment can't again injection rod be promoted forward, so the entry needle after stopping to use once is used again.
In above-mentioned self-destructing safety insurance syringe, described nipple middle part has the connecting ring that radially protrudes, and above-mentioned joint leading section and connecting ring are connected, and above-mentioned coupling rearward end and connecting ring are connected.
In above-mentioned self-destructing safety insurance syringe, described axial limiting circle is fixed or is resisted against on the annular convex shoulder.
In above-mentioned self-destructing safety insurance syringe, be arranged with the sheath that is used to protect entry needle in the described coupling.
Compared with prior art, this syringe adopts injection rod roof pressure head extrusion axis to make needle ring break away from that entry needle can enter in the injection tube under axial limiting circle and the effect at elastic component to spacing collar, can't seal again between axial limiting circle and the needle ring simultaneously, thereby realize the self-destruction of syringe, so this self-destructing safety insurance syringe has self-destruction mode advantage simple, safe and convenient to use.
Description of drawings
Fig. 1 is the sectional structure sketch map of this self-destructing safety insurance syringe.
Among the figure, 1, injection tube; 1a, joint; 2, injection rod; 21, screens sheet; 22, roof pressure head; 3, screens circle; 4, piston; 5, nipple; 51, annular convex shoulder; 52, connecting ring; 6, coupling; 7, axial limiting circle; 8, elastic component; 9, needle holder; 91, needle ring; 10, entry needle; 11, sheath.
The specific embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but this utility model be not limited to these embodiment.
As shown in Figure 1, this self-destructing safety insurance syringe comprises injection tube 1, injection rod 2, piston 4, needle holder 9, entry needle 10, elastic component 8, axial limiting circle 7.
Specifically, the front end of injection rod 2 is arranged in the injection tube 1 and at front end and is with piston 4, piston 4 is slidingly connected with injection tube 1 inwall and is in sealing all the time, and the front end of injection rod 2 has roof pressure head 22 in the form of a ring, and roof pressure head 22 is an integral structure with injection rod 2.On the inwall of the rear end of injection tube 1, be provided with screens circle 3, has the screens sheet 21 that can embed screens circle 3 on the injection rod 2 and near piston 4 places, after having injected medicinal liquid, injection rod 2 is embedded screens circle 3 to the pulling of injection tube 1 rear end until screens sheet 21, make injection rod 2 will promote forward again, so the entry needle 10 after effectively having stopped to use once is used again.
The front end of injection tube 1 has the joint 1a of tubular, and the tubular nipple 5 that is connected with it is housed in joint 1a, is with the tubular coupling 6 that is connected with nipple 5 outside nipple 5.Nipple 5 middle parts have the connecting ring 52 that radially protrudes, and joint 1a leading section and connecting ring 52 are connected, and coupling 6 rearward end and connecting ring 52 are connected.Nipple 5 rear ends have annular convex shoulder 51, and axial limiting circle 7 is fixed on the annular convex shoulder 51.As another kind of scheme, axial limiting circle 7 is resisted against on the annular convex shoulder 51.
Needle holder 9 is located in the nipple 5 and passes coupling 6, has passage in the needle holder 9, is fixed with entry needle 10 at the front end of passage, and entry needle 10 is connected with injection tube 1 by passage.The rear end of needle holder 9 has the needle ring 91 that radially protrudes, needle ring 91 has the tapered portion that is positioned at front end and is connected as a single entity with the columnar portion that is positioned at the rear end and both, the big rear end of the front end of tapered portion is little, the internal diameter of above-mentioned roof pressure head 22 is slightly larger than the front end of tapered portion, and the internal diameter of roof pressure head 22 is less than the internal diameter of annular convex shoulder 51; Cone abuts seals on axial limiting circle 7 and with its formation, and columnar portion is inserted in the axial limiting circle 7.Between needle holder 9 and nipple 5, be provided with the elastic component 8 that is set on the nipple 5; the two ends of elastic component 8 are resisted against respectively in needle ring 91 and the coupling 6; elastic component 8 is pressed on needle ring 91 on the axial limiting circle 7, is arranged with the sheath 11 that is used to protect entry needle 10 in coupling 6.
This syringe is in sealing state between axial limiting circle 7 and the needle ring 91 when not using, the end face of roof pressure head 22 relies on the axial limiting circle 7.After using this injector to inject medicinal liquid, at first, injection rod 2 is firmly promoted forward, roof pressure head 22 extrusion axises of injection rod 2 are to spacing collar 7, make axial limiting circle 7 distortion and slip over the tapered portion of needle ring 91, needle ring 91 is under the elastic force effect of elastic component 8 and move backward and break away from axial limiting circle 7.Then, injection rod 2 is pulled back, screens sheet 21 is snapped in the screens circle 3, this moment, needle holder 9 continuation were under the effect of elastic component 8 elastic force, needle holder 9 and entry needle 10 are pushed in the injection tube 1, thereby reach the purpose of self-destruction, simultaneously because the interaction of screens sheet 21 and screens circle 3, make injection rod 2 will promote forward again, thereby play safety effect.
Specific embodiment described herein only is that this utility model spirit is illustrated.This utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has used injection tube 1 morely; Joint 1a; Injection rod 2; Screens sheet 21; Roof pressure head 22; Screens circle 3; Piston 4; Nipple 5; Annular convex shoulder 51; Connecting ring 52; Coupling 6; Axial limiting circle 7; Elastic component 8; Needle holder 9; Needle ring 91; Entry needle 10; Sheath 11 terms such as grade, but do not get rid of the probability of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with this utility model spirit.
Claims (9)
1, a kind of self-destructing safety insurance syringe, comprise injection tube (1) and be arranged on the interior injection rod (2) of injection tube (1), front end at injection rod (2) is provided with cover piston (4) thereon, front end at injection tube (1) is equipped with needle holder (9), this needle holder (9) is connected with entry needle (10) and entry needle (10) is connected with injection tube (1), it is characterized in that, described needle holder (9) rear end has the needle ring (91) that radially protrudes, be provided with axial limiting circle (7) in the injection tube (1), described needle ring (91) external diameter is resisted against axial limiting circle (7) upper end greater than axial limiting circle (7) internal diameter and needle ring (91), and described injection rod (2) front end has and can act on axial limiting circle (7) and make needle ring (91) pass the roof pressure head (22) of axial limiting circle (7) when injection rod (2) is pushed into injection tube (1) front end.
2, self-destructing safety insurance syringe according to claim 1, it is characterized in that, described injection tube (1) front end has the joint (1a) of tubular, the tubular nipple (5) that is connected with it is housed in joint (1a), above-mentioned needle holder (9) is located in the nipple (5), outside nipple (5), be with the tubular coupling (6) that is connected with nipple (5), described nipple (5) rear end has annular convex shoulder (51), and above-mentioned axial limiting circle (7) is arranged on the annular convex shoulder (51).
3, self-destructing safety insurance syringe according to claim 2, it is characterized in that, also be equipped with in the described nipple (5) and be enclosed within that needle holder (9) goes up and needle ring (91) is pressed on elastic component (8) on the axial limiting circle (7), one end of elastic component (8) acts in the coupling (6), and the other end acts on the needle ring (91).
4, according to claim 1 or 2 or 3 described self-destructing safety insurance syringes, it is characterized in that, described needle ring (91) has the tapered portion that is positioned at front end and is connected as a single entity with the columnar portion that is positioned at the rear end and both, the big rear end of the front end of tapered portion is little, and cone abuts is on axial limiting circle (7), and columnar portion is inserted in the axial limiting circle (7).
5, self-destructing safety according to claim 4 insurance syringe is characterized in that, described roof pressure head (22) ringwise and roof pressure head (22) be connected as a single entity with injection rod (2).
6, self-destructing safety insurance syringe according to claim 2 is characterized in that having screens circle (3) on the inwall of described injection tube (1) rear end, has the screens sheet (21) that can embed screens circle (3) on the described injection rod (2).
7, self-destructing safety insurance syringe according to claim 2, it is characterized in that, described nipple (5) middle part has the connecting ring (52) that radially protrudes, above-mentioned joint (1a) leading section and connecting ring (52) are connected, and above-mentioned coupling (6) rearward end and connecting ring (52) are connected.
8, self-destructing safety insurance syringe according to claim 2 is characterized in that described axial limiting circle (7) is fixed or is resisted against on the annular convex shoulder (51).
9, self-destructing safety insurance syringe according to claim 4 is characterized in that, is arranged with the sheath (11) that is used to protect entry needle (10) in the described coupling (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113283U CN201370854Y (en) | 2009-02-06 | 2009-02-06 | Self-destroying safety injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113283U CN201370854Y (en) | 2009-02-06 | 2009-02-06 | Self-destroying safety injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201370854Y true CN201370854Y (en) | 2009-12-30 |
Family
ID=41496933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920113283U Expired - Fee Related CN201370854Y (en) | 2009-02-06 | 2009-02-06 | Self-destroying safety injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201370854Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823068A (en) * | 2016-11-28 | 2017-06-13 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of syringe |
-
2009
- 2009-02-06 CN CN200920113283U patent/CN201370854Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823068A (en) * | 2016-11-28 | 2017-06-13 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of syringe |
| CN106823068B (en) * | 2016-11-28 | 2019-11-12 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of syringe |
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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: 20091230 Termination date: 20180206 |