CN201505348U

CN201505348U - Spring type self-destroying syringe

Info

Publication number: CN201505348U
Application number: CN2009202373824U
Authority: CN
Inventors: 黄灵扬
Original assignee: 黄灵扬
Current assignee: SHANXI XINHUAMEI MEDICAL APPARATUS CO., LTD.
Priority date: 2009-10-16
Filing date: 2009-10-16
Publication date: 2010-06-16
Anticipated expiration: 2019-10-16

Abstract

The utility model relates to a spring type self-destroying syringe, which is characterized in that a steel needle is connected with a self-destroying part; the self-destroying part is sleeved in a needle base; the needle base is threadedly connected with the top of a cylinder; a barb is arranged at the lower end of the self-destroying part; the middle-lower end of a push rod is a cavity; a spring seat is arranged in the cavity; the top end of the spring seat is provided with a hook groove which can be hooked and matched with the barb; the spring seat is provided with a compression spring and also provided with a stop mechanism which leads the compression spring to be in the compression state; a rubber plug is sleeved at the top end of the spring seat; a rubber plug clamp ring is sleeved between the rubber plug and the spring seat; and a space is arranged between the push rod and the rubber plug. The spring type self-destroying syringe solves the problems of liquid leakage of the syringe and over-standard residual injection liquid in the using process.

Description

A kind of spring self-destroyed syringe

[technical field]

This utility model relates to a kind of injector for medical purpose, specifically, is a kind of spring self-destroyed syringe.

[background technology]

Syringe is common medical equipment, is a kind of medical equipment that directly contacts with blood of human body or body fluid.If operate lack of standardizationly, syringe tends to become fearful pathophoresis instrument.In medical application fields, it is strict mandatory provisions that syringe is merely able to disposable use.Improve at the textural of traditional syringe, can automatically syringe needle be hidden in the syringe body after syringe uses, the function that its forfeiture is reused prevents that from the structure structure of syringe syringe from repeating repeatedly to use.Reuse except forbidding syringe, to prevent that also the draw point syringe needle of used syringe exposes problem, because the draw point in the retraction syringe body punctures syringe body sometimes and draw point is exposed, the draw point syringe needle that exposes also existence can be pricked the defective of people and communicate illness.Therefore, the structure to syringe improves again, designs to make the syringe draw point after using, and after certain operation, makes draw point indentation push rod cavity.In the prior art, this class spring self-destroyed syringe after injection finishes, continues to advance push rod in injection tube, make spring base hook parts such as draw point earlier, push rod continues to advance and the extruding plug again, makes plug compression, and touches the stop bit mechanism of compression spring, be in the spring reinstatement of compressive state, retract spring base this moment, because spring base has hooked parts such as draw point, this moment, draw point also was drawn in the push rod cavity.Though this spring syringe has solved draw point to a certain extent and has exposed and hurt sb.'s feelings or pathophorous problem, but, this syringe is the stop bit mechanism that touches holddown spring by the extruding plug, therefore each parts cooperation of syringe is gone up and just must be designed to such an extent that plug can be compressed, and such cooperation just causes the technological deficiency that leakage in use occurs.In addition, owing to be the stop bit mechanism that touches holddown spring by the extruding plug, the technological deficiency that also exists the injection residual quantity to exceed standard.These are the deficiencies in the prior art parts.

[utility model content]

This utility model provides a kind of and in use can effectively prevent leakage and prevent the spring self-destroyed syringe that the injection residual quantity exceeds standard.

A kind of spring self-destroyed syringe, comprise draw point, the self-destruction part, needle stand, injection tube, push rod and plug, draw point is connected with the self-destruction part, the self-destruction part is socketed in the needle stand, needle stand is connected with the injection tube screw top, self-destruction part bottom is provided with barb, the lower end is a cavity in the push rod, be provided with spring base in the described cavity, the top of described spring base is provided with and can hooks the hook groove that cooperates with barb, is provided with holddown spring in the spring base, and be provided with the stop bit mechanism that makes holddown spring be in compressive state, it is characterized in that: described plug is socketed on the spring base top, is socketed with the plug snap ring between the two, is provided with the space between push rod and the plug.

Be provided with the plug bulge loop between described plug snap ring and the spring base top.

Stop bit bulge loop on the cavity inner wall that the described stop bit mechanism that makes holddown spring be in compressive state is a push rod.

The beneficial effects of the utility model: when spring self-destroyed syringe of the present utility model inject finish using after, continue to push ahead push rod, the barb of self-destruction part lower end just hooks the vertical hook groove of spring base, this moment, plug also withstood the inwall of injection tube, because plug is socketed on the spring base top, and be socketed with the plug snap ring between the two, be provided with the space between push rod and the plug, when push rod again during forward impelling, the plug that has held out against the injection tube inwall down promotes spring base by socket plug snap ring wherein, the also space between up intact push rod and plug just of push rod this moment, when down moving, just touched spring base stop bit mechanism with the holddown spring compression, compress the spring reinstatement this moment, with spring base, self-destruction part and draw point are drawn in the push rod cavity in the lump.Do not need to push plug in the whole operation process fully and make its distortion, just can finish action, plug that draw point is drawn in the push rod cavity easily is to be made by elastomeric material, and other parts are made by the PP plastics, such structure cooperation is drawn the parts of these two kinds of materials mutually and is touched, reach extraordinary air-tightness, solved the problem that leakage in use occurs,, therefore also can solve the technical problem that the injection residual quantity exceeds standard effectively owing to do not need to push plug.

[description of drawings]

Below in conjunction with accompanying drawing this utility model is further described.

Fig. 1 is that this utility model structure is cutd open and shown sketch map;

Fig. 2 is that hook groove cuing open when hooking self-destruction part lower end barb in this utility model spring base top shown sketch map;

Fig. 3 is this utility model compression spring reinstatement and self-destruction part and draw point is drawn in cuing open of push rod cavity show sketch map;

Fig. 4 is that cuing open of splitting of each critical piece of this utility model shown sketch map;

Fig. 5 is that cuing open of this utility model configuration plug bulge loop shown sketch map;

Fig. 6 is provided with cuing open of stop bit bulge loop in this utility model push rod cavity to show sketch map.

Wherein 11. draw points, 12. self-destruction parts, 13. needle stands, 14. self-destruction part bottoms, 15. barbs, 21. injection tubes, 22. injection tube tops, 301. push rods, 302. plugs, 303. cavitys, 304. spring bases, 305. hook grooves, 306. holddown springs, 307. stop bit mechanisms, 309. spring base tops, 308. push rod tops, 310. plug snap rings, 311. spaces, 312. plug bulge loops, 313. stop bit bulge loops among the figure.

[specific embodiment]

As shown in Figures 1 to 4, a kind of spring self-destroyed syringe, draw point 11 closely connects into as a whole with self-destruction part 12, bottom 14 at self-destruction part 12 is provided with barb 15, self-destruction part 12 is socketed in the needle stand 13, and under the effect except big external force, self-destruction part 12 can not flick easy coming off from needle stand 13, for example compress the pulling force of spring, could make both break away from.Needle stand 13 carries self-destruction part 12 and draw point 11 is threaded with injection tube top 22, thereby draw point 11, self-destruction part 12 and needle stand 13 threes and injection tube 21 are connected as one.The middle lower end of push rod 301 is cavitys 303 of a long tubular, be provided with spring base 304 in this cavity 303, be not provided with in the push rod cavity 303 before compression spring 306 and the screens mechanism 307, spring base 304 can slide up and down in push rod cavity 303, the top 309 of spring base 304 is provided with and can hooks the hook groove 305 that cooperates with barb 15, be provided with holddown spring 306 in the spring base 304, and be provided with the stop bit mechanism 307 that makes holddown spring 306 be in compressive state, spring base 304 can compress compression spring 306 and withstand stop bit mechanism 307 and make compression spring 306 be in compressive state, plug 302 is socketed on the top 309 of spring base 304, spring base 304 be by between compression spring 306 and the stop bit mechanism 307 cooperate and push rod 301 links together, and spring base 304 links together with plug 302, then push rod 301 links together with plug 302, plug 302 contacts with the inwall of injection tube 21, promoting push rod 301 just can make plug 302 do the piston motion up and down in injection tube 21, be socketed with plug snap ring 310 between plug 302 and spring base 304 tops 309, be provided with space 311 between push rod and the plug.When the spring self-destroyed syringe inject finish using after, continue to push ahead push rod 301, at this moment, as shown in Figure 2, the barb 15 of self-destruction part bottom 14 just hooks the vertical hook groove 305 of spring base, this moment, spring base 304 linked into an integrated entity with self-destruction part 12 and draw point, plug 302 has also withstood the inner roof wall of injection tube 21, because plug 302 is socketed on spring base top 309, and be socketed with plug snap ring 310 between the two, be provided with space 311 between push rod 301 and the plug 302, this moment is when push rod 301 again during forward impelling, the plug 302 that has held out against injection tube 21 inner roof walls down promotes spring base 304 by socket plug snap ring 311 wherein, the also space between up intact push rod and plug 302 just of push rod 301 this moment, when down moving, just touched spring base 304 stop bit mechanism 307 with holddown spring 306 compressions, after stop bit mechanism 307 is touched, 306 reinstatements of compression spring, compression spring 306 is with spring base, self-destruction part and draw point are drawn in the push rod cavity in the lump, and draw point etc. is drawn in one of push rod cavity is action thereby finished.Do not need to push plug in the whole operation process fully and make its distortion, just can finish action, plug that draw point is drawn in push rod cavity 303 easily is to be made by elastomeric material, and other parts are made by the PP plastics, such structure cooperation is drawn the parts of these two kinds of materials mutually and is touched, reach extraordinary air-tightness, solved the problem that leakage in use occurs,, therefore also can solve the technical problem that the injection residual quantity exceeds standard effectively owing to do not need to push plug.

As shown in Figure 5, be provided with plug bulge loop 312 between plug snap ring 311 and spring base 304 tops, thereby can make the sealing effectiveness of whole syringe better.

As shown in Figure 6, stop bit bulge loop 313 is set as stop bit mechanism in cavity 303, the better effects if when making holddown spring be in compressive state.

Claims

1. spring self-destroyed syringe, comprise draw point (11), self-destruction part (12), needle stand (13), injection tube (21), push rod (301) and plug (302), described draw point (11) is connected with self-destruction part (12), described self-destruction part (12) is socketed in the needle stand (13), described needle stand (13) is threaded with injection tube (21) top (22), self-destruction part (12) bottom (14) is provided with barb (15), the lower end is a cavity (303) in the described push rod (301), be provided with spring base (304) in the described cavity (303), the top (309) of described spring base (304) is provided with and can hooks the hook groove (305) that cooperates with barb (105), be provided with holddown spring (306) in the spring base (304), and be provided with the stop bit mechanism (307) that makes holddown spring (306) be in compressive state, it is characterized in that: described plug (302) is socketed on spring base top (309), be socketed with plug snap ring (310) between the two, be provided with space (311) between push rod (301) and the plug (302).

2. spring self-destroyed syringe according to claim 1 is characterized in that: be provided with plug bulge loop (312) between described plug snap ring (310) and spring base top (309).

3. spring self-destroyed syringe according to claim 1 and 2 is characterized in that: the stop bit bulge loop (313) on cavity (303) inwall that the described stop bit mechanism that makes holddown spring (306) be in compressive state is push rod (301).