CN2214197Y

CN2214197Y - Disposable rotary directional syringe

Info

Publication number: CN2214197Y
Application number: CN 94231175
Authority: CN
Inventors: 陈雄辉
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-15
Filing date: 1994-12-15
Publication date: 1995-12-06
Anticipated expiration: 2004-12-15

Abstract

The utility model provides a syringe used in medical industry, which is provided with a directional tooth at the end of the large mouth on the needle tube under the basis of the core bar of the original disposable syringe needle tube. The front end of the core bar is provided with a lug boss and the top of the core bar is provided with an inverse groove with two faces of the back-to-face simultaneously. The disposable syringe with the mentioned structure can achieve self-locking after using at one time, thereby, plays the disposable function truly. The utility model has the advantage of simple structure and easy production.

Description

Disposable rotary directional syringe

This utility model relates to the syringe in the medical apparatus and instruments, especially a kind of disposable syringe.

Syringe is a kind of medical apparatus that directly acts on human body, and is therefore higher to its hygienic requirements, common syringe, since reusable, not thorough as detoxicating, or other reason, can cause crowd's interleave to infect, and spread disease.So disposable syringe just arises at the historic moment.But common disposable syringe because of not taking to take precautions against reusable structure, still can be reused artificially.Like this, for obtaining really to play the syringe of disposable effect, people are provided with many dissimilar self-lockings or self-distruction structure by every means on syringe, can not reuse after disposable use guaranteeing again.As disclosed in the Chinese patent 88108835,93119148 etc., but they also all have common defective, and promptly structure is complicated, and this must cause price, the problem of aspects such as manufacturing.

The purpose of this utility model for overcoming the deficiency of above-mentioned prior art, provides a kind of simple in structure, the disposable syringe that cost is low exactly.

Disposable syringe of the present utility model, comprise needle tubing and core bar, the core bar front end is provided with a boss, having the opposite groove of direction on 90 ° the diagonal angle rib each other on the core bar, the one directed tooth which is provided with the core bar through hole is placed in the big opening end of needle tubing, one spring penetrates through hole by the diagonal angle of through hole, and the directed tongue of a backstop core bar front end boss is arranged on the positioning tooth.

Below by concrete drawings and Examples the present invention is described in further detail.

Fig. 1 is the structural representation of an embodiment of the present utility model at initial condition.

Fig. 2 is the structural representation of an embodiment of the present utility model when being filled solution.

Fig. 3 is being in the structural representation of injection position for an embodiment of the present utility model.

Fig. 4 is the structural representation of the position of an embodiment of the present utility model after injection finishes.

Fig. 5 is the sketch map of spring arch clasp.

Fig. 6 is directed toothing sketch map.

Among the figure: 1 needle tubing, 2 core bars, 3 forwards fall groove, 4 and oppositely fall groove, 5 spring arch clasps, 6 directed teeth, 7 boss, 8 directed tongues.

As shown in the figure, spring arch clasp 5 is installed in the directed tooth 6, in this embodiment, have a square through hole in the directed tooth 6, spring arch clasp 5 penetrates through hole from two diagonal angles of square through hole, and directed tooth 6 has a directed tongue 9, core bar 2 is square to the cross section, on four corner angle, correspondence has forward side channel 3 and reverse groove 4, and the front end of core bar 2 is provided with a boss 8.

During use, at first make forward fall the angle engagement of the feeding spring arch clasp 5 in groove 3 and the fixed square tooth 6, core bar 2 is outwards pulled out, and perfusion liquid medicine is owing to be that forward falls groove, so 6 pairs of core bars 2 of spring arch clasp are provided with backstop action, after being filled liquid medicine, rotate core bar 2, because the front end of core bar 2 is the garden cylindricality, so it is rotatable, after rotating 90 °, a directed tongue on directed tooth 6 just in time stops boss 7 in this position, makes core bar 2 just in time rotate 90 °, pushing core bar 2 is injected, 6 pairs of core bars of snap ring this moment are unobstructed, finish until injection, at this moment, as stirring core bar 2 again, then, core bar can't be extracted, again because core bar 2 is a square pole because jump ring blocks oppositely groove, just in time be engaged in the through hole of directed tooth 6, core bar 2 can't be rotated.The existing self-locking of historical facts or anecdotes.

Certainly, that above-mentioned is an embodiment of the present utility model, as core bar is arranged to cross, corresponding directed through hole is a cross, also be to realize very easily after learning above-mentioned thought,, all belong to category of the present invention so all belong to the distortion of design category of the present invention.

Claims

1, a kind of disposable syringe, comprise needle tubing and core bar, it is characterized in that: the core bar front end is provided with a boss, having the opposite groove of direction on 90 ° the diagonal angle rib each other on the core bar, the one directed tooth which is provided with the core bar through hole is placed in the big opening end of needle tubing, one spring penetrates through hole by the diagonal angle of through hole, and the directed tongue of a backstop core bar front end boss is located on the directed tooth.