CN204655682U - A kind of automatic retracting needle tip formula safety injector - Google Patents
A kind of automatic retracting needle tip formula safety injector Download PDFInfo
- Publication number
- CN204655682U CN204655682U CN201520304104.1U CN201520304104U CN204655682U CN 204655682 U CN204655682 U CN 204655682U CN 201520304104 U CN201520304104 U CN 201520304104U CN 204655682 U CN204655682 U CN 204655682U
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- China
- Prior art keywords
- needle stand
- syringe
- core bar
- hollow core
- needle
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Abstract
The utility model discloses a kind of automatic retracting needle tip formula safety injector, comprising: syringe; Be set in the sheath of syringe front end; Be arranged on the bounced back needle stand in the needle stand installing hole of syringe front end, can the bounce back front end of needle stand is provided with needle point, the cover on needle stand that can bounce back has back-moving spring, the needle stand that can bounce back is positioned in needle stand installing hole by the outer shroud that is fixed on needle stand installing hole inwall, outer shroud is connected by the thin-walled that can be destroyed with the needle stand that can bounce back, the needle stand bottom that can bounce back is provided with towards the pointed cone structure of syringe tail end, is provided with the through hole be communicated with the infusion channel of the needle stand that can bounce back in the middle part of pointed cone structure; Be arranged on the hollow core bar in syringe, the tail end of hollow core bar is provided with lid, the periphery, front end of hollow core bar is provided with piston body, lid can rotate around the tail end inwall of hollow core bar, an expansion link is provided with in hollow core bar, when hollow core bar is shifted onto foremost, rotate lid, the front end of expansion link to be stretched in through hole and is threaded connection with it.
Description
Technical field
This utility model relates to medical syringe field, particularly a kind of automatic retracting needle tip formula safety injector.
Background technology
Cause the cross infection of virus in order to avoid using antihygienic syringe, disposable syringe is widely used at medical field.Reuse to stop artificial recovery, people arrange self-desttruction equipment on disposable syringe.But, although common self-destruction syringe can prevent reusing of syringe and cause the cross infection of virus to a certain extent, but syringe produces many inconvenience because draw point exposes the syringe making to discard after using in the processes such as collection, transport, process, still likely stab medical worker and other relevant personnel, cause the infection of virus and bacteria.
Chinese patent was once disclosed multinomial steel needle retractable destructing safety formula syringe, but the feature of its structure arranges rebound spring between needle stand and inside, injection tube upper end, after using described injector to inject, under the action of the spring, draw point is entered in the cavity of core bar together with needle stand by resilience, occur because draw point exposes the phenomenon of stabbing the relevant personnel after preventing syringe from using, reach safe object.But, find that existing steel needle retractable destructing safety formula syringe exists following weak point in practice: in order to save resource medicine, medicinal liquid in injection tube generally can all be injected complete by medical personnel, but when top shifted onto by core bar, easy triggering draw point is entered in the cavity of core bar together with needle stand by resilience, now draw point bounces back when patient is careless, easily causes the pain of patient's puncture place and brings psychic influence to patient, also incomplete safety.
Utility model content
The purpose of this utility model is above-mentioned deficiency for existing syringe and defect, provides a kind of needle tip automatic retraction safe syringe, to solve the problem.
The technical problem that this utility model solves can realize by the following technical solutions:
A kind of needle tip automatic retraction safe syringe, comprising:
Syringe, described syringe front end is provided with a needle stand installing hole;
Be set in the sheath of described syringe front end;
Be arranged on the bounced back needle stand in the needle stand installing hole of described syringe front end, the front end of the described needle stand that bounces back is provided with needle point, on the described needle stand that bounces back, cover has back-moving spring, one end of described back-moving spring is against in described syringe front inner wall, the other end is against bottom the described needle stand that can bounce back, the described needle stand that bounces back is positioned in described needle stand installing hole by the outer shroud that is fixed on described needle stand installing hole inwall, described outer shroud is connected by the thin-walled that can be destroyed with the described needle stand that bounces back, the described needle stand bottom that bounces back is provided with towards the pointed cone structure of syringe tail end, the through hole be communicated with the infusion channel of the needle stand that can bounce back is provided with in the middle part of described pointed cone structure,
Be arranged on the hollow core bar in described syringe, the tail end of described hollow core bar is provided with lid, the periphery, front end of described hollow core bar is provided with piston body, it is characterized in that, described lid can rotate around the tail end inwall of described hollow core bar, an expansion link is provided with in described hollow core bar, the tail end of described expansion link is fixed on described lid, the front end of described expansion link extends to the inner face place near described piston body, when described hollow core bar is shifted onto foremost, rotate described lid, the front end of described expansion link to be stretched in described through hole and is threaded connection with it.
In a preferred embodiment of the present utility model, described pointed cone structure comprises some pointed cone sheets that circumference is distributed in described through hole periphery.
In a preferred embodiment of the present utility model, described syringe front end is provided with a reset sealing shell fragment, when the described needle stand that bounces back bounces back in described hollow core bar, described reset sealing shell fragment resets and covers on described needle stand installing hole.
Owing to have employed technical scheme as above, when this utility model uses, the normal drawing liquid injection of medical personnel; When hollow core bar is shifted onto foremost, the injection in syringe has all been expelled in patient body, and now syringe needle is detached patient injection position by medical personnel; Medical personnel then rotate lid, the front end of expansion link to be stretched in through hole and is threaded connection with it, because outer shroud is motionless, expansion link transmission and under threaded function, so can bounce back between needle stand and outer shroud relative movement occurs, outer shroud and the thin-walled that can bounce back between needle stand are destroyed, and the needle stand that can bounce back under the elastic force effect of back-moving spring moves retraction to lid direction, so can bounce back, needle stand can retract in hollow core bar, realizes the automatic retracted of needle point.In addition, the automatic retracted of needle point occurs when detaching patient injection position, can not damage patient, meets the requirement of safety injection.
Accompanying drawing explanation
In order to be illustrated more clearly in this utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of embodiment of this utility model.
Fig. 2 is the structural representation of a kind of embodiment partly cut-away of this utility model.
Fig. 3 is the I place structure for amplifying schematic diagram of Fig. 2.
Fig. 4 is the decomposition texture schematic diagram of a kind of embodiment of this utility model.
Fig. 5 is the bounced back needle stand perspective view of a kind of embodiment of this utility model.
Fig. 6 is the bounced back needle stand perspective cross section structural representation of a kind of embodiment of this utility model.
Fig. 7 is the perspective view that the bounced back needle stand of a kind of embodiment of this utility model is separated with outer shroud.
Section of structure when Fig. 8 is the injection of a kind of embodiment of this utility model.
Fig. 9 is the section of structure after a kind of embodiment needle point of this utility model is received.
Detailed description of the invention
The technological means realized to make this utility model, creation characteristic, reaching object and effect is easy to understand, setting forth this utility model further below.
See a kind of needle tip automatic retraction safe syringe shown in Fig. 1 to Fig. 9, comprise syringe 100, the needle stand 600 that can bounce back, sheath 200 and hollow core bar 300 and lid 400.Syringe 100 front end is provided with a needle stand installing hole 110, and the needle stand 600 that can bounce back is arranged in needle stand installing hole 110, and the front end of the needle stand 600 that can bounce back is provided with needle point 500.
The cover on needle stand 600 that can bounce back has back-moving spring 700, and one end of back-moving spring 700 is against in syringe front inner wall, and the other end is against in the annular flange flange 601 of periphery bottom the needle stand 600 that can bounce back.The needle stand 600 that can bounce back is positioned in needle stand installing hole 110 by the outer shroud 610 that is fixed on needle stand installing hole 110 inwall, and outer shroud 610 is connected by a thin-walled that can be destroyed 640 with the needle stand 600 that can bounce back.Needle stand 600 bottom that can bounce back is provided with towards the pointed cone structure 620 of syringe 100 tail end, and be provided with the through hole 622 be communicated with the infusion channel 630 of the needle stand 600 that can bounce back in the middle part of pointed cone structure 620, through hole 622 inwall leading portion is provided with female thread 623.Pointed cone structure 620 in the present embodiment comprises some pointed cone sheets 621 that circumference is distributed in through hole 622 periphery.
Hollow core bar 300 can be arranged in syringe 100 with promoting, and the tail end of hollow core bar 300 is provided with rotatable lid 400, and the periphery, front end of hollow core bar 300 is provided with piston body 310.An expansion link 800 is provided with in hollow core bar 300, the tail end 810 of expansion link 800 is fixed on lid 400, the front end 820 of expansion link 800 extends to the inner face place near piston body 310, and the front end 820 of expansion link 800 is provided with the external screw thread 821 coordinated with female thread 623.When hollow core bar 300 is shifted onto foremost, rotate lid 400.
When this utility model uses, the normal drawing liquid injection of medical personnel, when hollow core bar 300 is shifted onto foremost, the injection in syringe 100 has all been expelled in patient body, and now syringe needle 500 is detached patient injection position by medical personnel, medical personnel then rotate lid 400, the front end of expansion link 800 to be stretched in through hole 622 and is connected by threaded engagement between female thread 623 and external screw thread 821, because outer shroud 610 is motionless, expansion link 800 transmission and under threaded function, so can bounce back between needle stand 600 and outer shroud 610 relative movement occurs, outer shroud 610 and the thin-walled 640 that can bounce back between needle stand 600 are destroyed, the needle stand 600 that can bounce back under the elastic force effect of back-moving spring 700 moves retraction to lid 400 direction, so can bounce back, needle stand 600 can retract in hollow core bar 300, realize the automatic retracted of needle point.In addition, the automatic retracted of needle point occurs when detaching patient injection position, can not damage patient, meets the requirement of safety injection.
In order to prevent needle point the leaking of dead space capacity after automatic retracted further, syringe 100 front end is provided with a reset sealing shell fragment 900, when the needle stand 600 that can bounce back bounces back in hollow core bar 300, the sealing shell fragment 900 that resets resets and covers on needle stand installing hole 110.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; this utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed this utility model.The claimed scope of this utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. an automatic retracting needle tip formula safety injector, comprising:
Syringe, described syringe front end is provided with a needle stand installing hole;
Be set in the sheath of described syringe front end;
Be arranged on the bounced back needle stand in the needle stand installing hole of described syringe front end, the front end of the described needle stand that bounces back is provided with needle point, on the described needle stand that bounces back, cover has back-moving spring, one end of described back-moving spring is against in described syringe front inner wall, the other end is against bottom the described needle stand that can bounce back, the described needle stand that bounces back is positioned in described needle stand installing hole by the outer shroud that is fixed on described needle stand installing hole inwall, described outer shroud is connected by the thin-walled that can be destroyed with the described needle stand that bounces back, the described needle stand bottom that bounces back is provided with towards the pointed cone structure of syringe tail end, the through hole be communicated with the infusion channel of the needle stand that can bounce back is provided with in the middle part of described pointed cone structure,
Be arranged on the hollow core bar in described syringe, the tail end of described hollow core bar is provided with lid, the periphery, front end of described hollow core bar is provided with piston body, it is characterized in that, described lid can rotate around the tail end inwall of described hollow core bar, an expansion link is provided with in described hollow core bar, the tail end of described expansion link is fixed on described lid, the front end of described expansion link extends to the inner face place near described piston body, when described hollow core bar is shifted onto foremost, rotate described lid, the front end of described expansion link to be stretched in described through hole and is threaded connection with it.
2. a kind of automatic retracting needle tip formula safety injector as claimed in claim 1, is characterized in that, described pointed cone structure comprises some pointed cone sheets that circumference is distributed in described through hole periphery.
3. a kind of automatic retracting needle tip formula safety injector as claimed in claim 1 or 2, it is characterized in that, described syringe front end is provided with a reset sealing shell fragment, when the described needle stand that bounces back bounces back in described hollow core bar, described reset sealing shell fragment resets and covers on described needle stand installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304104.1U CN204655682U (en) | 2015-05-12 | 2015-05-12 | A kind of automatic retracting needle tip formula safety injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304104.1U CN204655682U (en) | 2015-05-12 | 2015-05-12 | A kind of automatic retracting needle tip formula safety injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204655682U true CN204655682U (en) | 2015-09-23 |
Family
ID=54126126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520304104.1U Expired - Fee Related CN204655682U (en) | 2015-05-12 | 2015-05-12 | A kind of automatic retracting needle tip formula safety injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204655682U (en) |
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2015
- 2015-05-12 CN CN201520304104.1U patent/CN204655682U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201400 Shanghai City, Fengxian District Hangzhou Highway No. 1888 building Sixth Patentee after: Poly Biological Technology Co Ltd Address before: 201400 Shanghai City, Fengxian District Hangzhou Highway No. 1888 building Sixth Patentee before: SHANGHAI JUMIN BIOLOGICAL TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20200512 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |