CN204655681U - The safety injector of the mid-spring of a kind of core bar - Google Patents
The safety injector of the mid-spring of a kind of core bar Download PDFInfo
- Publication number
- CN204655681U CN204655681U CN201520304087.1U CN201520304087U CN204655681U CN 204655681 U CN204655681 U CN 204655681U CN 201520304087 U CN201520304087 U CN 201520304087U CN 204655681 U CN204655681 U CN 204655681U
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- CN
- China
- Prior art keywords
- core bar
- needle stand
- hollow core
- retraction body
- syringe
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Abstract
The utility model discloses the safety injector of the mid-spring of a kind of core bar, comprising: syringe, syringe front end is provided with a needle stand installing hole; Can bouncing back, it is fixing to rely on stiction to coordinate between needle stand and the inwall of needle stand installing hole, and the front end of the needle stand that can bounce back is provided with needle point; Be set in the sheath of syringe front end; 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, the front center of hollow core bar is provided with a through hole, the front center of hollow core bar is provided with the retraction body that passes through hole, the middle part cover of retraction body has two ends to be connected to Compress Spring bottom the front end inner face of hollow core bar and retraction body, when hollow core bar is shifted onto foremost, the front end of retraction body with can bounce back the tail end clamping of needle stand; By threaded engagement between retraction body and through-hole wall, lid can rotate around the tail end inwall of hollow core bar, and the tail end of retraction body is connected by an expansion link with between lid.
Description
Technical field
This utility model relates to medical syringe field, particularly the safety injector of the mid-spring of a kind of core bar.
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 the safety injector of the mid-spring of a kind of core bar, to solve the problem.
The technical problem that this utility model solves can realize by the following technical solutions:
A safety injector for the mid-spring of core bar, comprising:
Syringe, described syringe front end is provided with a needle stand installing hole;
Be arranged on the bounced back needle stand in the needle stand installing hole of described syringe front end, describedly bounce back that to rely on stiction to coordinate between needle stand and the inwall of described needle stand installing hole fixing, the front end of the described needle stand that bounces back is provided with needle point;
Be set in the sheath of described syringe front end;
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, the front center of described hollow core bar is provided with a through hole, the front center of described hollow core bar is provided with the retraction body that passes described through hole, the middle part cover of described retraction body has two ends to be connected to Compress Spring bottom the front end inner face of described hollow core bar and described retraction body, when described hollow core bar is shifted onto foremost, the front end of described retraction body and the tail end clamping of the described needle stand that bounces back;
It is characterized in that, by threaded engagement between described retraction body and described through-hole wall, described lid can rotate around the tail end inwall of described hollow core bar, and the tail end of described retraction body is connected by an expansion link with between described lid.
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.
In a preferred embodiment of the present utility model, the inwall of described needle stand installing hole is coaxial and be arranged at intervals with a pair elastic spacing internal projecting ring, and the wall coaxial of the described needle stand that bounces back is provided with one in order to be stuck in the outer bulge loop of elastic spacing between described a pair elastic spacing internal projecting ring.
In a preferred embodiment of the present utility model, the tail end of described retraction body is provided with the outward flange abutted for described Compress Spring.
In a preferred embodiment of the present utility model, the front end of described retraction body is provided with a clamping joint, and the tail end of the described needle stand that bounces back is provided with the draw-in groove of clamping joint cooperation described in.
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, under the transmission of expansion link, retraction body rotates, relatively rotate between retraction body and hollow core bar, because hollow core bar now has been shifted onto foremost, so bouncing back under the threaded function between body and through-hole wall, retraction body moves to lid direction, the drive needle stand that can bounce back moves to lid direction, now can bounce back needle stand and needle stand installing hole inwall between stiction transfer kinetic force of friction to, and kinetic force of friction is less than the elastic force of Compress Spring, so can bounce back under the effect of Compress Spring, needle stand retracts in hollow core bar, 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.
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 be a kind of embodiment of this utility model injection complete time structural representation.
Fig. 2 is the structural representation after the needle tip retracts after a kind of embodiment injection of this utility model.
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.
Shown in Fig. 1 and Fig. 2, the safety injector of the mid-spring of a kind of core bar comprises syringe 100, the needle stand 200 that can bounce back, sheath (not shown) and hollow core bar 300.Syringe 100 front end is provided with a needle stand installing hole 110, the needle stand 200 that can bounce back is arranged in needle stand installing hole 110, can bouncing back, it is fixing to rely on stiction to coordinate between needle stand 200 and the inwall of needle stand installing hole 110, and the front end of the needle stand 200 that can bounce back is provided with needle point 210.The inwall of the needle stand installing hole 110 in the present embodiment is coaxial and be arranged at intervals with a pair elastic spacing internal projecting ring 111, and the wall coaxial of the needle stand 200 that can bounce back is provided with one in order to be stuck in the outer bulge loop 220 of elastic spacing between a pair elastic spacing internal projecting ring 111.
Hollow core bar 300 can be arranged in syringe 100 with promoting, the tail end of hollow core bar 300 is provided with lid 310, the periphery, front end of hollow core bar 300 is provided with piston body 320, the front center of hollow core bar 300 is provided with a through hole 340, the front center of hollow core bar 300 is provided with the retraction body 330 that passes through hole 340, and retraction body 330 is coordinated by screw thread 341 with between through hole 340 inwall.Retraction body 330 middle part cover have two ends be connected to hollow core bar 300 front end inner face and retraction body 330 bottom Compress Spring 400.The tail end of the retraction body 330 in the present embodiment is provided with the outward flange 331 abutted for Compress Spring 400.
When hollow core bar 300 is shifted onto foremost, the front end of retraction body 330 and the tail end clamping of the needle stand 200 that can bounce back.The front end of retraction body 330 is provided with a barb type clamping joint 332, and the tail end of the needle stand 200 that can bounce back is provided with the draw-in groove 230 of barb type clamping joint 332 cooperation.
Lid 310 can rotate around the tail end inwall of hollow core bar 300, and the tail end of retraction body 330 is connected by an expansion link 500 with between lid 310.
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 is detached patient injection position by medical personnel, medical personnel then rotate lid 310, under the transmission of expansion link 500, retraction body 330 rotates, relatively rotate between retraction body 330 and hollow core bar 300, because hollow core bar 300 now has been shifted onto foremost, so bouncing back under the threaded function between body 330 and through hole 400 inwall, retraction body 330 moves to lid 310 direction, the drive needle stand 200 that can bounce back moves to lid 310 direction, now can bounce back needle stand 200 and needle stand installing hole 110 inwall between stiction transfer kinetic force of friction to, and kinetic force of friction is less than the elastic force of Compress Spring 400, so can bounce back under the effect of Compress Spring 400, needle stand 200 retracts 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 600, when the needle stand 200 that can bounce back bounces back in hollow core bar 300, the sealing shell fragment 600 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 (5)
1. a safety injector for the mid-spring of core bar, comprising:
Syringe, described syringe front end is provided with a needle stand installing hole;
Be arranged on the bounced back needle stand in the needle stand installing hole of described syringe front end, describedly bounce back that to rely on stiction to coordinate between needle stand and the inwall of described needle stand installing hole fixing, the front end of the described needle stand that bounces back is provided with needle point;
Be set in the sheath of described syringe front end;
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, the front center of described hollow core bar is provided with a through hole, the front center of described hollow core bar is provided with the retraction body that passes described through hole, the middle part cover of described retraction body has two ends to be connected to Compress Spring bottom the front end inner face of described hollow core bar and described retraction body, when described hollow core bar is shifted onto foremost, the front end of described retraction body and the tail end clamping of the described needle stand that bounces back;
It is characterized in that, by threaded engagement between described retraction body and described through-hole wall, described lid can rotate around the tail end inwall of described hollow core bar, and the tail end of described retraction body is connected by an expansion link with between described lid.
2. the safety injector of the mid-spring of a kind of core bar as claimed in claim 1, 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.
3. the safety injector of the mid-spring of a kind of core bar as claimed in claim 1, it is characterized in that, the inwall of described needle stand installing hole is coaxial and be arranged at intervals with a pair elastic spacing internal projecting ring, and the wall coaxial of the described needle stand that bounces back is provided with one in order to be stuck in the outer bulge loop of elastic spacing between described a pair elastic spacing internal projecting ring.
4. the safety injector of the mid-spring of a kind of core bar as claimed in claim 1, is characterized in that, the tail end of described retraction body is provided with the outward flange abutted for described Compress Spring.
5. the safety injector of the mid-spring of a kind of core bar as claimed in claim 1, is characterized in that, the front end of described retraction body is provided with a clamping joint, and the tail end of the described needle stand that bounces back is provided with the draw-in groove of clamping joint cooperation described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304087.1U CN204655681U (en) | 2015-05-12 | 2015-05-12 | The safety injector of the mid-spring of a kind of core bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304087.1U CN204655681U (en) | 2015-05-12 | 2015-05-12 | The safety injector of the mid-spring of a kind of core bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204655681U true CN204655681U (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520304087.1U Expired - Fee Related CN204655681U (en) | 2015-05-12 | 2015-05-12 | The safety injector of the mid-spring of a kind of core bar |
Country Status (1)
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|---|---|
| CN (1) | CN204655681U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108113883A (en) * | 2016-11-29 | 2018-06-05 | 南方医科大学珠江医院 | Drawing liquid container and liquid pumping method |
| WO2018106777A1 (en) * | 2016-12-07 | 2018-06-14 | Henkel IP & Holding GmbH | Syringe with piston assembly |
| CN109701115A (en) * | 2018-11-30 | 2019-05-03 | 衡刚 | A kind of automatic self-destruction syringe |
-
2015
- 2015-05-12 CN CN201520304087.1U patent/CN204655681U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108113883A (en) * | 2016-11-29 | 2018-06-05 | 南方医科大学珠江医院 | Drawing liquid container and liquid pumping method |
| WO2018106777A1 (en) * | 2016-12-07 | 2018-06-14 | Henkel IP & Holding GmbH | Syringe with piston assembly |
| US10821470B2 (en) | 2016-12-07 | 2020-11-03 | Henkel IP & Holding GmbH | Syringe with piston assembly |
| CN109701115A (en) * | 2018-11-30 | 2019-05-03 | 衡刚 | A kind of automatic self-destruction syringe |
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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 |