CN2170110Y - Safety structure for syringe - Google Patents

Abstract

The utility model relates to a novel structure (2) of an injector with safe use. An injection barrel head of the utility model is composed of a needle head and a conical barrel body. The appropriate position of the outer wall of the conical barrel body is provided with a concave ring, and a convex ring is formed on the inner wall of the conical barrel body corresponding to the concave ring. A liquid pushing rod is composed of a push rod body, a rubber ring, a short cone, and a connection part which can be broken off. After a needle barrel is used by a user, the liquid pushing rod is pushed to the bottom end of the needle barrel and then is backwards pulled out of the injection barrel head, and the push rod body is broken off on the position where the connection part of the liquid pushing rod can be broken off, which makes the injection barrel head containing the needle head reserved in the injection barrel.

Description

Safety structure for syringe

This utility model system is about a kind of syringe novel structure safe in utilization they (two), it is to do further improvement at No. 92221022.5 utility model patent case of China, mainly after syringe is finished using, fluid push rod shifted onto with the injection tube head contact, make the oval cone of fluid push rod front end to be buckled into one with the bulge loop of the conic tube inwall of injection tube head, the residual quantity of liquid medicine is greatly reduced, again fluid push rod is picked out backward, the related injection tube head of backward pulling out, short cone on the mat fluid push rod blocks the flange of injection tube tail end inboard, and in the broken place, connecting portion position of fluid push rod, the push rod main body of fluid push rod is fractureed, make the injection tube head that includes syringe needle retain in the injection tube, but and then the used syringe of safe handling.

Press, before the applicant No. 92221022.5 (a kind of syringe novel structure safe in utilization) the utility model patent case (hereinafter to be referred as the patent case) getting permission of applying for mainly tie up in: this structure comprises the injection tube head, injection tube and fluid push rod, wherein, the injection tube head is made of syringe needle and conic tube two parts, wherein has a bulge loop at this conic tube inner edge, and fluid push rod mainly is by the push rod main body, push away the liquid plug, rubber grommet, short cone, circular rings and broken connecting portion are formed, when user usefulness finishes syringe, shift fluid push rod onto the syringe bottom, make the bulge loop of the conic tube inwall that pushes away liquid plug and injection tube head of fluid push rod be buckled into one, pull out fluid push rod more backward, the related injection tube head of backward pulling out, the short cone of mat fluid push rod blocks the flange of injection tube tail end inboard, and in a broken place, connecting portion position, the push rod main body of fluid push rod is fractureed, make the injection tube head that includes syringe needle retain in the injection tube, and then the used syringe of safe handling, but the injection tube head of this former patent case with push away the liquid plug and fasten after, push away between the bulge loop of liquid plug and injection head inner edge and remained too many residual liquid medicine, a little shortcoming is still arranged in the use, therefore, this case creator is developed according to this again and a kind ofly is provided with an oval cone at the fluid push rod front end, this elliptic cone shape and injection tube head inner edge close fit mutually are integral, the residual quantity of liquid medicine is greatly reduced, can improve the shortcoming of former patent case, desirable more in the use.

Therefore, this creation is intended to the structure at No. 92221022.5 utility model patent case of Chinese patent, make further improvement design, mainly tie up to fluid push rod and be provided with an oval cone, and should ellipse cone former patent case of desirable generation directly to push away the situation that liquid plug 11 engages with injection tube head 22, this elliptic cone shape and injection tube head inner edge be close fit mutually, and the bulge loop of the conic tube inwall of the oval cone of fluid push rod and injection tube head is buckled into one, the oval interpyramidal liquid medicine residual quantity of injection tube head and fluid push rod is greatly reduced, make this syringe have more favorable effects, be its feature.

For to the purpose of this utility model, shape constructing apparatus feature and effect thereof, make further understanding and understanding, describe it in detail for the embodiment conjunction with figs. now:

First figure: three-dimensional exploded view of the present utility model.

Second figure: cutaway view of the present utility model.

The 3rd figure: fluid push rod of the present utility model is advanced to the generalized section that engages with the injection tube head.

The 4th figure: fluid push rod of the present utility model is moved the generalized section of blocking with flange and the push rod upper body being fractureed to together with the tube head.

The 5th figure: the three-dimensional exploded view of the embodiment of large-scale syringe of the present utility model.

The 6th figure, the cutaway view of the embodiment of large-scale syringe of the present utility model.

See also shown in first figure, this creation is a kind of syringe novel structure safe in utilization they (two), mainly comprises formations such as an injection tube head 22 that includes syringe needle 21, an injection tube 23, a fluid push rod 20.

Wherein, injection tube head 22 is made of a syringe needle 21 and a conic tube 221 2 parts, syringe needle 21 is fixed on the cone 221, and both axis direction unanimities, wherein the appropriate location of these conic tube 221 outer walls is provided with a scrobicular ring 61, forms a bulge loop 51(simultaneously shown in second figure on conic tube 221 inner wall positions corresponding to this scrobicular ring 61).

Injection tube 23 is a hollow tube-shape body, the one end is the engaging 231 of slightly condensation, these snap openings 231 inwalls are provided with a bulge loop 41, and its inner rim system cooperates the external diameter of the conic tube 221 of injection tube head 22, so that the scrobicular ring 61 of conic tube 221 outer walls of this injection tube head 22 can be blocked in the bulge loop 41 of injection tube 23 inwalls.If large-scale syringe, then the snap openings 231 of this injection tube 23 can be partially a side (consulting the 5th and the 6th figure), and it is comparatively convenient to make when the large-scale syringe of operation.The position of the other end outer rim of this injection tube 23 and contiguous its end is provided with an outstanding oblong ring 24, and the inwall of this injection tube 23 has a loop flange 311(in place, outstanding oblong ring 24 rear positions and consults shown in second figure), this flange 311 can stop that the short cone 14 of fluid push rod 20 is drawn out to avoid fluid push rod 20 integral body.

Fluid push rod 20 front ends are provided with oval cone 11, this appropriate location, ellipse cone 11 rear is provided with a circular rings 13, wear a rubber grommet 12 between oval cone 11 and circular rings 13, the two ends of this rubber grommet 12 are circular and form a ring groove between two annulus.If large-scale syringe then should 11 of ellipse cones can be located at a side (consulting shown in the 5th and the 6th figure) partially, and rubber grommet 12 with position that oval cone 11 matches on be provided with one partially and wear mouthfuls 121 for being set between oval cone 11 and the circular rings 13.In addition, fluid push rod 20 roughly is being provided with a short cone 14 near circular rings 13 places, this short cone 14 is connected with a broken connecting portion 16, this broken connecting portion 16 is a snap point 17 with the junction point of short cone 14, connect a push rod body 18 in broken connecting portion 16 rears, the tail end of this push rod 18 connects a circular base plate 19 as advancing the basis.

Operational approach of the present utility model, when dial-out is external after user uses syringe to finish, fluid push rod 20 is advanced to the end fully to contact with injection tube head 22, slightly exert pressure and force the oval cone 11 of fluid push rod 20 front ends to cross bulge loop 51 and be buckled into one fully closely, make the liquid medicine residual quantity of 11 of the oval cones of injection tube head 22 and fluid push rod 20 greatly reduce (consulting shown in the 3rd figure) with bulge loop 51 inner edges of conic tube 221 inwalls of injection tube head 22.If see also large-scale syringe shown in the 6th figure, the location short slot 312 that can utilize flange 311 when then fluid push rod 20 advances fastens with the rib 181 of push rod body 18 peripheries of fluid push rod 20, fluid push rod 20 can be advanced to exactly with injection tube head 22 be buckled into one closely.When user is pulled out injection tube 23 with fluid push rod 20 backward, the injection tube head 22 that then comprises syringe needle 21 this moment is also together by past post-tensioning, and when fluid push rod 20 is pulled to its short cone 14 and stops for the flange 311 of injection tube 23, being about to fluid push rod 20 fractures in snap point 17 places, make fluid push rod 20 be broken into two joints (consulting the 4th figure), so, the injection tube head 22 that includes syringe needle 21 is retained in the injection tube 23 with the 20 1 joint combinations of the fluid push rod with cone 11, and short cone 14 is that injection tube tail end medial flange 311 stops, can prevent that it from coming off, therefore, the easiest bundle people's syringe needle 21 partly then can retain in the injection tube 23 safely.

In sum, the utility model is compared with No. 92221022.5 Patent Case, what the utility model characteristics tied up to that oval cone 11 with fluid push rod 20 front ends replaces female case pushes away liquid plug 11, of the present utility modelly should ellipse cone 11 shapes can fully closely be buckled into one with bulge loop 51 inner edges of conic tube 221 inwalls of injection tube head 22, the liquid medicine residual quantity is greatly reduced, therefore, this case is Nover practical very, can improve and promote the effect of female case, the spy proposes the continuation application of the utility model patent part in accordance with the law.

Claims (4)

1, a kind of syringe novel structure safe in utilization they (two) mainly includes formations such as injection tube head, injection tube and fluid push rod; It is characterized in that: the appropriate location of a circular cone tube outer wall of injection tube head is provided with a scrobicular ring, forms a bulge loop simultaneously on the conic tube inner wall position corresponding to this scrobicular ring; The fluid push rod front end is provided with an oval cone, and the space is similar and can be fastened on one closely in the bulge loop of this elliptic cone shape and the conic tube inwall of injection tube head; Be provided with a snap openings on injection tube front end appropriate location, this snap openings inwall is provided with a bulge loop, is provided with a loop flange in the appropriate location of contiguous injection tube tail end inwall.

2, a kind of syringe novel structure safe in utilization as claimed in claim 1 they (two), it is characterized in that: the snap openings of injection tube wherein also can be located at a side partially.

3, a kind of syringe novel structure safe in utilization as claimed in claim 1 they (two), it is characterized in that: the oval cone of fluid push rod front end wherein also can be located at a side partially, this ellipse cone can wear a rubber grommet, this rubber grommet with position that the elliptic cone bulk phase cooperates on be provided with one and wear mouth.

4, a kind of syringe novel structure safe in utilization as claimed in claim 1 they (two) is characterized in that: can be provided with several location short slots at a distance of appropriate intervals on the loop flange of injection tube inwall wherein.

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