CN2137961Y

CN2137961Y - Protective safety syringe tube

Info

Publication number: CN2137961Y
Application number: CN 92234441
Authority: CN
Inventors: 陈隆雄
Original assignee: Individual
Current assignee: Li Xiuqing
Priority date: 1992-10-09
Filing date: 1992-10-09
Publication date: 1993-07-14
Anticipated expiration: 2002-10-09

Abstract

The utility model relates to a protective safety syringe tube, which comprises a syringe tube, an inner cylindrical body, a piston shackle, a fixed base, a needle body, etc. A front hole and a rear hole are arranged on the piston shackle at the front end of the cylindrical body. The rear hole nests with the inner cylindrical body, the front hole is shaped as a skew ellipse, one side of the hole is a skew wall, the other side of the hole is a barb, and the front hole tightly nests with an ellipse-shaped salient at the end of the needle body. After an injection is finished, the needle body can withdraw into the syringe tube, the needle body is tilted, so the needle tip can not be stretched out, thus preventing medical staff from being stabbed and infected with virus and from using the needle body again due to fooster.

Description

Protective safety syringe tube

This utility model relates to a kind of protection injection safety syringe.

General medical personnel and remove the medical orderly of Biohazard Waste, easily at work because of accidentally by the entry needle spine and, and then infection is as high risk infectious disease such as hepatitis, AIDS.Though design has a kind of syringe than safeguard construction, utilizes the elastic force of metal spring, can make whole needle point spring into and stay in the syringe after injection is finished.But this structure, when needle point detached people's muscle, needle point still can be of short duration was exposed to the extraneous space of human body, still had by needle point thorn and and the danger infected.And also might be in some cases, needle point stretches out by foramen primum and exposes, thorn and health officer.

In order to remedy above-mentioned deficiency of the prior art, this utility model provides a kind of to be had the protection effect, avoids being stung the protection injection safety syringe that reaches by needle point accidentally in the work for medical personnel and health officer.

In order to achieve the above object, the measure that this utility model is taked is: the inner cylinder front end in syringe is equipped with the piston hook ring, piston hook ring outer end is the concavo-convex ring-type of multiple tracks, the hole that each tool one of front and back does not run through, back stomidium is connected with the fixation hook of inner cylinder front end is nested, and front aperture is to tilt ellipse garden shape, one side the hole is beveled walls, another side is a barb, the ellipse garden shape protuberance fit of this Kong Keyu needle body end; Firm banking is fixed in syringe inwall front end, with syringe with multiple tracks groove, the tight fit of bulge loop, it is relative with the conicoid of piston hook ring front end that the firm banking rear end is a conicoid, two conicoids can fit tightly; A through hole is run through in the needle body axle center, the needle body front end is a needle point, the centre is a needle body portion, the rear end is an ellipse garden shape protuberance, needle body portion be provided with bulge loop can with the groove fit on the firm banking centre bore, but pin hole portion is provided with the hole, the ellipse garden of the length that radially runs through of a supplied gas, medicinal liquid discharge, and this hole, ellipse garden respectively accounts for about 1/2nd in the middle of firm banking and piston hook ring; When the inner cylinder in the syringe when liquid medicine injection pushes away forward, the piston hook ring of inner cylinder front end and the protuberance of needle body end pack into and catch on, and take out inner cylinder needle body all is retracted in the syringe, and needle point, the needle body portion deflection syringe inwall that makes needle body is on one side.

For reaching aforementioned purpose, also taked following measure: piston hook ring front aperture is made a circular hole that does not run through, and the bottom, hole is an inclined plane, and the hole front end is the trip of overhead kick shape; The protuberance of needle rear end is one and has the discoid of tapering, can with piston hook ring front aperture fit.

This utility model adopts the following drawings:

Fig. 1 is the three-dimensional view of this utility model embodiment;

Fig. 2 is the plan view of this utility model embodiment;

Fig. 3 is the floor map of this utility model embodiment needle body retraction syringe;

Fig. 4 is the floor map of this utility model embodiment needle body bending, distortion;

Fig. 5 is the sketch map that this utility model embodiment needle body cooperates with the inclination of piston hook ring;

Fig. 6 is the three-dimensional view of another embodiment of this utility model;

Fig. 7 is the plan view of another embodiment of this utility model;

Fig. 8 is the floor map of another embodiment needle body retraction syringe of this utility model.

Below in conjunction with embodiment and accompanying drawing this utility model is done more detailed explanation.

As Fig. 1 and 2, this utility model is made up of a syringe 10, an inner cylinder 20, a piston hook ring 30, a firm banking 40 and a needle body 50.The front end of the inner cylinder 20 in syringe 10 cooperates and is equipped with piston hook ring 30, and this piston hook ring 30 is made by elastomeric material, and its outer edge 36 is concavo-convex ring-type, and front and back respectively have a hole of not running through 31,32; The hole 32 of rear end is nested with the fixation hook 21 of inner cylinder 20 front ends and is connected; The hole 31 of front end is to tilt ellipse garden shape, on one side front end is a beveled walls 35, another side is a barb 34, and hole 31 can closely be entangled with the ellipse garden shape protuberance 51 of needle body 50 ends.Syringe 10 inwall front ends are equipped with firm banking 40, and this firm banking 40 is also made for the rubber material, and outer wall has the

annular groove

41,42,43 in three roads, three road bulge loops, 11,12, the 13 tight fits of these grooves and syringe 10 inwalls.Firm banking 40 rear ends are a conicoid 44, and the gradient of this conicoid 44 is relative with the conicoid 35 of piston hook ring 30 front ends, and two conicoids 44,35 can fit tightly.Needle body 50 front ends are needle point 52, and mid portion is a needle body portion 53, have in the needle body portion 53 twice bulge loop 54,55 can with bipassage ring connected in star 46,47 on the centre bore 45 of firm banking 40 fit mutually.Needle body 50 rear ends are the protuberance 51 of an ellipse garden shape, have one to be hole, the ellipse garden of the length that radially runs through 56 in the needle body portion 53 of protuberance 51 front ends, this hole, ellipse garden 56 be located at firm banking 40 and piston hook ring 30 the centre each 1/2nd, gas and medicinal liquid could be discharged fully like this.Needle body 50 axle center are a through hole that runs through 57, and needle body 50 promptly cooperates with groove 46,47, the centre bore 45 of firm banking 40 with bulge loop 54,55, needle body portion 53 and is fixed on the firm banking 40.Will move as needle body 50 time backward, must compress the shared space that has of medicinal liquid, and force piston hook ring 30 to move backward, but the resistance of needle point 52 is because of sharp keen and minimum, and because of combinations such as bulge loop 54,55, grooves 46,47, so there is not the worry that needle body 50 retreats.When the inner cylinder in the syringe 10 20 pushes away forward when using up at liquid medicine injection, the hole 31 of inner cylinder 20 front end piston hook rings 30 packs into the protuberance 51 of needle body 50 ends and catches on (referring to Fig. 5),, take out inner cylinder 20 in advance needle body portion 53 and needle point 52 are all shunk back in syringe 10 inside (as Fig. 3) still when patient's muscle is inner at needle point 52.Because of hole 31 is skewed, and do not have the support of firm banking 40, so can not become equilibrated its straight state, the needle point 52 of needle body 50 and needle body portion 53 promptly are partial to syringe 10 inwalls on one side.Pack into syringe 10 front ends with a needle tip shield 60 this moment, finished the effect of dual security protection.As Fig. 4, advance inner cylinder 20 to force metal needle point 52 to touch firm banking 40 again and bending, distortion, not only can not expose by needle point, can exempt medical personnel again and in acting hurriedly in a messy situation, use and communicate illness once again.

Fig. 6,7,8 is respectively the floor map of three-dimensional view, plan view and the needle body retraction syringe of another embodiment of this utility model.Syringe 10 among the figure, inner cylinder 20, firm banking 40 etc. are same as aforesaid embodiment fully, and the front aperture 71 of different is piston hook ring 70 is a round shape hole of not running through, and the bottom in this hole 71 is an inclined plane 72, and hole 71 front ends are barb-like trip 73.In addition, it is discoid that the protuberance 81 of needle body end after 80s is a tool tapering, and this protuberance 81 can push away forward when most at liquid medicine injection in the inner cylinder in the syringe 10 20, with hole 71 fits of piston hook ring 70, and the protuberance 81 that can trip 73 be locked, so that finish the effect of needle body 80 retraction syringes 10.

Claims

1, a kind of protection injection safety syringe, comprise syringe, inner cylinder, piston hook ring, firm banking and needle point etc., it is characterized in that the inner cylinder front end in the syringe is equipped with the piston hook ring, piston hook ring outer end is the concavo-convex ring-type of multiple tracks, the hole that each tool one of front and back does not run through, and back stomidium is connected with the fixation hook of inner cylinder front end is nested, front aperture is to tilt ellipse garden shape, the one side in hole is beveled walls, and another side is a barb, the ellipse garden shape protuberance fit of this Kong Keyu needle body end; Firm banking is fixed in syringe inwall front end, with syringe with multiple tracks groove, the tight fit of bulge loop, it is relative with the conicoid of piston hook ring front end that the firm banking rear end is a conicoid, two conicoids can fit tightly; A through hole is run through in the needle body axle center, the needle body front end is a needle point, the centre is a needle body portion, the rear end is an ellipse garden shape protuberance, needle body portion be provided with bulge loop can with the groove fit on the firm banking centre bore, but needle body portion is provided with the hole, the ellipse garden of the length that radially runs through of a supplied gas, medicinal liquid discharge, and this hole, ellipse garden respectively accounts for about 1/2nd in the middle of firm banking and piston hook ring; When the inner cylinder in the syringe when liquid medicine injection pushes away forward, the piston hook ring of inner cylinder front end and the protuberance of needle body end pack into and catch on, and take out inner cylinder needle body all is retracted in the syringe, and needle point, the needle body portion deflection syringe inwall that makes needle body is on one side.

2, protection injection safety syringe according to claim 1 is characterized in that piston hook ring front aperture is a round shape hole of not running through, and the bottom, hole is an inclined plane, and the hole front end is the trip of overhead kick shape; The protuberance of needle rear end is one and has the discoid of tapering, can with piston hook ring front aperture fit.