CN101269249B - Improved low-speed retraction injector of needle - Google Patents
Improved low-speed retraction injector of needle Download PDFInfo
- Publication number
- CN101269249B CN101269249B CN200810061414XA CN200810061414A CN101269249B CN 101269249 B CN101269249 B CN 101269249B CN 200810061414X A CN200810061414X A CN 200810061414XA CN 200810061414 A CN200810061414 A CN 200810061414A CN 101269249 B CN101269249 B CN 101269249B
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- pushing cylinder
- low
- speed retraction
- needle
- syringe
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Abstract
The invention relates to an improved slowly-withdrawing needle injector, which includes a hollow syringe, a hollow pushing cylinder arranged in the syringe, and a rubber plug arranged on the head part of the hollow pushing cylinder. A neilsbed is arranged on the contracted-diameter part on the front end of the syringe. The improved slowly-withdrawing needle injector is characterized in that the neilsbed is supported by a locking ring closely matching the front-end inner wall of the neilsbed, a slowly withdrawing piece axially corresponding to and matching with the locking ring shaft is arranged in the pushing cylinder, a blocking core is arranged on the upside of the slowly withdrawing piece, the blocking core and the locking ring are interlocked together by a clamping mechanism, a first springy supporting claw which contacts the inner wall of the pushing cylinder during withdrawal is arranged on the lower part of the slowly withdrawing piece, a compression spring is arranged between the pushing cylinder and the slowly withdrawing piece. After the injection is done, the upper part of the slowly withdrawing piece and the locking ring are interlocked, the compression spring ejects the slowly withdrawing piece to drive the locking ring and the neilsbed to break away from the inner wall of the syringe, the slowly withdrawing piece slowly slides down to the under side of the pushing cylinder along the inner wall of the pushing cylinder.
Description
Technical field
The present invention relates to a kind of injector for medical purpose, syringe needle can bounce back to conceal and be unlikely to expose the injector for medical purpose of hurting sb.'s feelings after especially a kind of injection finished.
Background technology
Facts have proved of modern medicine, for avoiding to the input of the mankind or animal or cross infection takes place when taking out medium, hypodermic syringe must disposable use, is using later promptly as garbage disposal.Using maximum disposable syringes at present is by a cavity syringe, syringe needle and the journey piston of deciding that is fitted in the syringe are formed, the existing greatest problem of this syringe is after injection finishes, its syringe needle still is trapped in the outside, sharp-pointed degree with respect to syringe needle, it not only is the carrying of syringe rubbish, destroying makes troubles, often take place because of the thing of stabbing the medical and nursing work personnel accidentally simultaneously, this the secondary cross infection of pathogenic bacteria just inevitably can occur, particularly be used to suffer from serious infectious disease (as acquired immune deficiency syndrome (AIDS) for those, hepatitis, SARS etc.) syringe of patient's use, the medical hidden danger that can not ignore especially, practice shows, the damage that the needle stick injuries that dangerous needle set causes obviously causes more than other accidents.
In recent years, along with it is found that disposable syringe do not had good people reclaim use repeatedly after, in having proposed self-destruction syringe at the end of last century, self-destruction syringe can destroy voluntarily after it uses or be locked and can not reuse.But some present syringes all have an important disadvantages, and that is exactly that the nurse will manually pull out syringe needle after injection finishes, and are complicated thereby the injection manipulation that makes becomes, and make troubles for medical worker's use; A kind of syringe needle is arranged in addition with the automatic retractable syringe of spring, this syringe is after injection is finished, syringe needle can bounce back in the syringe under the effect of spring automatically, but the shortcoming of this syringe be moment retraction speed too fast, blood is sprayed in the acupuncture treatment hole by the pressure of human body own, causes the secondary cross infection.
Summary of the invention
Technical problem to be solved by this invention is: after providing a kind of injection to finish, and the safe medical syringe of needle capable of automatically retracting to the syringe.This syringe thoroughly solves the problem of the secondary cross infection that exists in the prior art.
In order to solve the problems of the technologies described above, the present invention is by the following technical solutions: a kind of improved low-speed retraction injector of needle, comprise hollow barrel, be installed in the hollow pushing cylinder in the syringe, be installed in the plug of hollow pushing cylinder head, described syringe front end diameter shrinkage part is equipped with needle stand, it is characterized in that: described needle stand is supported by the lock ring with syringe front inner wall close-fitting, be provided with low-speed retraction spare axially corresponding with lock ring and that cooperate in the described pushing cylinder, described low-speed retraction spare top is provided with the core of the card, the core of the card fastens by snap fastener and lock ring, low-speed retraction spare bottom is provided with when bouncing back and the contacted first elasticity support claw of pushing cylinder inwall, be provided with the compression spring between pushing cylinder and low-speed retraction spare, after injection finishes, low-speed retraction spare top engages with lock ring, and compression spring springing low-speed retraction spare drives lock ring and needle stand and syringe inwall and breaks away from, and low-speed retraction spare slides to the pushing cylinder bottom at a slow speed down along the pushing cylinder inwall.
But described low-speed retraction spare is provided with the vertical elasticity hangers of hook pushing cylinder, this hangers stretched into syringe front end diameter shrinkage part and breaks away from the pushing cylinder top after injection finished, described pushing cylinder front end is provided with shoulder block, described low-speed retraction spare is provided with and the corresponding shoulder of this shoulder block, the bottom of low-speed retraction spare is provided with boss, and described compression both ends of the spring is pressing shoulder block and the boss on the pushing cylinder respectively.
Described pushing cylinder top is provided with the hangers seat that matches with hangers, and correspondingly the syringe front end is provided with and injects the embeddable groove of back hangers seat that finishes.
Described needle stand lower end is provided with the second elasticity support claw, correspondingly the syringe inwall is provided with the groove that the second elasticity support claw embeds, the needle stand endoporus is stretched in the upper end of described lock ring, the lock ring lower end is provided with the shoulder that supports second elasticity support claw below, the second elasticity support claw is just in time pressed by the outer ring of lock ring shoulder top, outer ring, described lock ring upper end is provided with flange, and described needle stand inner hole wall is provided with to match with flange and stops the back-up ring that lock ring glides.
Described snap fastener is the frustum of being located at the elastic pawl of gathering to the center at lock ring top and being located at low-speed retraction spare the core of the card top.
Described pushing cylinder is provided with the sloping platform rank that dwindle the pushing cylinder internal diameter.
The present invention compared with prior art has the following advantages: after 1, injection finishes, low-speed retraction spare drives lock ring and needle stand and syringe inwall and breaks away from, compression spring springing low-speed retraction spare glides at a slow speed and bounces back in the pushing cylinder along the pushing cylinder inwall, syringe needle is accommodated in the syringe, it is too fast to have solved the moment retraction speed that exists in the prior art, blood is sprayed in the acupuncture treatment hole by the pressure of human body own, causes the problem of secondary cross infection.2, syringe construction is reasonable, and thrust is light, good reliability, and easy operating is fit to apply.
Description of drawings
Fig. 1 is the cutaway view of unused state of the present invention;
Fig. 2 is the cutaway view of drawing liquid state of the present invention;
Fig. 3 pushes away the finish cutaway view of state of liquid for the present invention;
Fig. 4 is the cutaway view of needle retractable of the present invention to the pushing cylinder internal state;
Fig. 5 is Fig. 1 partial enlarged drawing.
The specific embodiment
Referring to Fig. 1 and Fig. 5, a kind of improved low-speed retraction injector of needle, comprise hollow barrel 1, be installed in the hollow pushing cylinder 2 in the syringe 1, be installed in the plug 3 of hollow pushing cylinder 2 heads, syringe 1 front end diameter shrinkage part is equipped with needle stand 4, needle stand 4 is supported by the lock ring 5 with syringe 1 front inner wall close-fitting, needle stand 4 lower ends are provided with elasticity support claw 6, the quantity of elasticity support claw 6 is at least 2, correspondingly the syringe inwall is provided with the groove 7 (referring to Fig. 4) that elasticity support claw 6 embeds, the needle stand endoporus is stretched in the upper end of lock ring 5, lock ring 5 tops are provided with the elastic pawl of gathering to the center 8, outer ring, lock ring 5 upper end is provided with flange 9, the needle stand inner hole wall is provided with flange 9 and cooperates the back-up ring 10 that is used to stop lock ring 5 downslides, and lock ring 5 lower ends are provided with the shoulder 11 of support elastic support claw 6 belows, and elasticity support claw 6 is just in time pressed by the outer ring 12 of lock ring shoulder 11 tops.
Be provided with low-speed retraction spare 13 axially corresponding with lock ring 5 and that cooperate in the pushing cylinder 2, low-speed retraction spare 13 tops are provided with the core of the card 14, the core of the card 14 is provided with frustum 15, but low-speed retraction spare 13 middle parts are provided with the vertical elasticity hangers 16 of hook pushing cylinder, the quantity of elasticity hangers 16 is at least 2, this hangers 16 stretched into syringe front end diameter shrinkage part and breaks away from the pushing cylinder top after injection finished, in order to make hangers 16 safer with the hook of pushing cylinder, the pushing cylinder top is provided with the hangers seat 17 that matches with hangers 16, correspondingly the syringe front end is provided with and injects the back hangers seat 17 embeddable grooves 18 that finish, pushing cylinder 2 front ends are provided with shoulder block 19, low-speed retraction spare 13 is provided with and this shoulder block 19 corresponding shoulders 20, low-speed retraction spare 13 bottoms are provided with when bouncing back and the contacted elasticity support claw 21 of pushing cylinder inwall, be contacting of the elasticity support claw 21 of the inwall that makes pushing cylinder and low-speed retraction spare 13 bottoms, pushing cylinder is provided with the sloping platform rank 22 that dwindle the pushing cylinder internal diameter, for keeping pushing cylinder and 13 sealings of low-speed retraction spare, 13 of pushing cylinder and low-speed retraction spares are provided with water shutoff circle 23, the top that low-speed retraction spare 13 bottoms are positioned at elasticity support claw 21 is provided with boss 26,13 of pushing cylinder 2 and low-speed retraction spares are provided with compression spring 24, compression spring 24 two ends are being pressed the shoulder block 19 on the pushing cylinder and the boss 26 of low-speed retraction spare bottom respectively, after injection finishes, low-speed retraction spare 13 tops fasten by snap fastener and lock ring 5, snap fastener is the frustum 15 of being located at the elastic pawl of gathering to the center 8 at lock ring 5 tops and being located at low-speed retraction spare the core of the card 14 tops, compression spring 24 springing low-speed retraction spares 13 drive lock ring 5 and needle stand and syringe inwall and break away from, and low-speed retraction spare 13 slides to the pushing cylinder bottom at a slow speed down along the pushing cylinder inwall.
As Fig. 1,2,3,4, be the overall process of the present invention's use.Wherein Fig. 1 is the cutaway view of unused state, the core of the card 14 on the low-speed retraction spare 13 does not pass lock ring 5 at this moment, hangers 16 on the low-speed retraction spare 13 is hooked on the pushing cylinder top and does not break away from pushing cylinder, Fig. 2 is the cutaway view of drawing liquid state, this moment, the sheath 25 in needle stand 4 outsides was removed, Fig. 3 pushes away the finish cutaway view of state of liquid, the core of the card 14 on the low-speed retraction spare 13 passes lock ring 5 at this moment, elastic pawl 8 on the lock ring 5 engages with frustum 15 on the core of the card 14, hangers 16 on the low-speed retraction spare 13 breaks away from the pushing cylinder top simultaneously, prepares for bouncing back automatically; Fig. 4 is the cutaway view of needle retractable to the pushing cylinder internal state, compressing spring 24 springing low-speed retraction spares 13 this moment glides, low-speed retraction spare 13 drives lock ring 5 and glides, when lock ring 5 glides, elasticity support claw 6 breaks away from the syringe inwall, needle stand 4 also breaks away from lock ring 5 and syringe, because of the sloping platform rank 22 of pushing cylinder inwall dwindle the pushing cylinder internal diameter, make the elasticity support claw 21 of low-speed retraction spare 13 bottoms just in time contact with pushing cylinder 2 inwalls, low-speed retraction spare 13 is not to be at moment retraction, but under the frictional resistance that overcomes between elasticity support claw 21 and the pushing cylinder 2 low-speed retraction.
The foregoing description is only for the usefulness that the present invention is described, and be not limitation of the present invention, the those of ordinary skill in relevant technologies field is under the situation that does not break away from the spirit and scope of the present invention, can also make various variations and modification, so all technical schemes that are equal to also belong to category of the present invention.
Claims (9)
1. improved low-speed retraction injector of needle, comprise hollow barrel (1), be installed in the hollow pushing cylinder (2) in the syringe (1), be installed in the plug (3) of hollow pushing cylinder (2) head, described syringe front end diameter shrinkage part is equipped with needle stand (4), it is characterized in that: described needle stand (4) is supported by the lock ring (5) with syringe front inner wall close-fitting, be provided with low-speed retraction spare (13) axially corresponding with lock ring (5) and that cooperate in the described pushing cylinder (2), described low-speed retraction spare (13) top is provided with the core of the card (14), the core of the card (14) fastens by snap fastener and lock ring (5), low-speed retraction spare (13) bottom is provided with when bouncing back and the contacted first elasticity support claw (21) of pushing cylinder inwall, be provided with compression spring (24) between pushing cylinder (2) and low-speed retraction spare (13), described low-speed retraction spare (13) but on also be provided with the vertical elasticity hangers of hook pushing cylinder (16), this hangers (16) stretched into syringe front end diameter shrinkage part and breaks away from the pushing cylinder top after injection finished, described pushing cylinder front end is provided with shoulder block (19), low-speed retraction spare (13) is provided with and the corresponding shoulder of this shoulder block (19) (20), the bottom of low-speed retraction spare (13) is provided with boss (26), shoulder block (19) and the boss (26) on the pushing cylinder pressed at described compression spring (24) two ends respectively, after injection finishes, low-speed retraction spare (13) top engages with lock ring (5), compression spring (24) springing low-speed retraction spare (13) drives lock ring (5) and needle stand and syringe inwall and breaks away from, and low-speed retraction spare (13) slides to the pushing cylinder bottom at a slow speed down along the pushing cylinder inwall.
2. a kind of improved low-speed retraction injector of needle as claimed in claim 1, it is characterized in that: described pushing cylinder (2) top is provided with the hangers seat (17) that matches with hangers (16), and correspondingly the syringe front end is provided with and injects the back embeddable groove of hangers seat (17) (18) that finishes.
3. a kind of improved low-speed retraction injector of needle as claimed in claim 1 or 2, it is characterized in that: described needle stand (4) lower end is provided with the second elasticity support claw (6), correspondingly the syringe inwall is provided with the groove (7) that the second elasticity support claw (6) embeds, the needle stand endoporus is stretched in the upper end of described lock ring (5), lock ring (5) lower end is provided with the shoulder (11) that supports the second elasticity support claw (6) below, the second elasticity support claw (6) is just in time pressed by the outer ring (12) of lock ring shoulder (11) top, outer ring, described lock ring (5) upper end is provided with flange (9), and described needle stand inner hole wall is provided with to match with flange (9) and stops the back-up ring (10) of lock ring (5) downslide.
4. a kind of improved low-speed retraction injector of needle as claimed in claim 1 or 2 is characterized in that: described snap fastener is to be located at the elastic pawl of gathering to the center (8) at lock ring (5) top and the frustum (15) of being located at low-speed retraction spare the core of the card (14) top.
5. a kind of improved low-speed retraction injector of needle as claimed in claim 1 or 2 is characterized in that: described pushing cylinder (2) is provided with the sloping platform rank (22) that dwindle the pushing cylinder internal diameter.
6. a kind of improved low-speed retraction injector of needle as claimed in claim 1 or 2 is characterized in that: be provided with water shutoff circle (23) between described pushing cylinder (2) and low-speed retraction spare (13).
7. a kind of improved low-speed retraction injector of needle as claimed in claim 4 is characterized in that: the quantity of described elastic pawl (8) is at least 2.
8. a kind of improved low-speed retraction injector of needle as claimed in claim 3 is characterized in that: the quantity of described elasticity hangers (16) is at least 2.
9. a kind of improved low-speed retraction injector of needle as claimed in claim 1 or 2 is characterized in that: the quantity of the described first elasticity support claw (21) is at least 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061414XA CN101269249B (en) | 2008-04-28 | 2008-04-28 | Improved low-speed retraction injector of needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061414XA CN101269249B (en) | 2008-04-28 | 2008-04-28 | Improved low-speed retraction injector of needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101269249A CN101269249A (en) | 2008-09-24 |
| CN101269249B true CN101269249B (en) | 2010-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810061414XA Expired - Fee Related CN101269249B (en) | 2008-04-28 | 2008-04-28 | Improved low-speed retraction injector of needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101269249B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127751A1 (en) * | 2010-04-14 | 2011-10-20 | 浙江康泰医疗器械有限公司 | Syringe with retracting steel needle and movable snap head |
| CN102218175A (en) * | 2010-04-14 | 2011-10-19 | 李华美 | Retractable needle cylinder for steel needle |
| WO2014080417A2 (en) * | 2012-11-23 | 2014-05-30 | Rathore Jai Hind | Self-retractable safety (srs) syringe for single use |
| WO2014080421A2 (en) * | 2012-11-26 | 2014-05-30 | Rathore Jai Hind | Auto-retractable safety (ars) syringe for single use |
| US11065394B2 (en) * | 2015-07-15 | 2021-07-20 | Guangdong Intmed Medical Appliance Co., Ltd. | Syringe with retractable needle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843517A (en) * | 2006-04-13 | 2006-10-11 | 林作钱 | Safe medical syringe with needle capable of automatically retracting |
| CN200980870Y (en) * | 2006-08-23 | 2007-11-28 | 林作钱 | Improved safety syringe |
| CN201220020Y (en) * | 2008-04-28 | 2009-04-15 | 林作钱 | Improved injection syringe with slowly retracted needle head |
-
2008
- 2008-04-28 CN CN200810061414XA patent/CN101269249B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843517A (en) * | 2006-04-13 | 2006-10-11 | 林作钱 | Safe medical syringe with needle capable of automatically retracting |
| CN200980870Y (en) * | 2006-08-23 | 2007-11-28 | 林作钱 | Improved safety syringe |
| CN201220020Y (en) * | 2008-04-28 | 2009-04-15 | 林作钱 | Improved injection syringe with slowly retracted needle head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101269249A (en) | 2008-09-24 |
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Legal Events
| Date | Code | Title | Description |
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| 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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Qianxiguan Mold Co., Ltd. Assignor: Lin Zuoqian Contract record no.: 2012330000216 Denomination of invention: Improved low-speed retraction injector of needle Granted publication date: 20100609 License type: Exclusive License Open date: 20080924 Record date: 20120427 |
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| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI MENGLI INTERNATIONAL TRADE CO., LTD. Free format text: FORMER OWNER: LIN ZUOQIAN Effective date: 20150505 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 317513 TAIZHOU, ZHEJIANG PROVINCE TO: 200120 PUDONG NEW AREA, SHANGHAI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20150505 Address after: 200120 room 58, 2202 Liu long road, Shanghai, Pudong New Area Patentee after: Shanghai Sol-Millennium Medical Products Co., Ltd. Address before: 317513 Zhejiang Qianxi light plastic mould Co., Ltd., Wenling City, Zhejiang Province Patentee before: Lin Zuoqian |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20180428 |
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| CF01 | Termination of patent right due to non-payment of annual fee |