CN2422974Y

CN2422974Y - Self-destruction disposable injector

Info

Publication number: CN2422974Y
Application number: CN 00222827
Authority: CN
Inventors: 邹赣
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-18
Filing date: 2000-04-18
Publication date: 2001-03-14
Anticipated expiration: 2010-04-18

Abstract

The utility model relates to a self-destruction type disposable injector. The utility model is composed of a needle head assembly, a needle pipe, a rubber plug, a push rod, and a rotary body component. The utility model is characterized in that the connection between the rubber plug and the push rod can be realized by the rotary body; the disposable tension and the disposable thrust can be used in order that the rotary body can be rotated along axial direction; thereby, the connection and the separation between the rubber plug and the push rod can be realized. After the injector is used for the first time, the integral body of the utility model is scrapped. Compared with the existing injector, the utility model additionally has one rotary body. The cost of the rotary body is 5 percent of the cost of the injector unit assembly. The utility model has the obvious advantages of low fabricating cost and safety.

Description

Re-use preventing once-used syringe

This utility model relates to a kind of syringe, the nonrecoverable syringe of a kind of self-destruction of definitely saying so.

The present syringe that uses in the hospital though majority is disposable, because of needle tubing and push rod syringe needle and needle tubing can be realized natural separation, thereby is utilized easily once more, diminishes patient.

The purpose of this utility model is: safe in utilization for guaranteeing, at the problems referred to above, provide a kind of re-use preventing once-used syringe.

The purpose of this utility model realizes by implementing following technical proposals:

Re-use preventing once-used syringe is made of syringe needle, needle tubing, rotary body, push rod four parts.Have internal tooth on the tail end inwall of syringe needle, have the anticreep groove on the outer wall of the head and neck position of needle tubing, syringe needle is by the internal tooth on its tail end inwall, and dress is inserted in the anticreep groove of needle tubing head and neck, and syringe needle is installed securely on needle tubing; Device has directed tooth on needle tubing afterbody wide-mouth end face inwall; Rotary body is equipped with in inner chamber front portion at needle tubing, and the shape of rotary body should make its front end and needle interior wall driving fit and the rear portion is a Cylinder, and its Cylinder surface, rear portion is provided with curve guide groove, and this guide groove shape can be designed to along rotary body axially become approximate M type; In the needle tubing cavity, the assembly that is connected with the rotary body cylinder is a push rod, this push rod front end face (with the contacted end face of rotary body) inwall is provided with directed tooth, push rod matches by the lip-deep curve guide groove of this tooth and rotary body, in the locking that pushes away, draws, can realize under the turning effort push rod and rotary body or separate; The push rod surface is provided with guide groove, its shape can be designed to along push rod shaft to becoming approximate h type, or door type or M type is all kinds of, and this guide groove cooperates with directed tooth on the needle tubing afterbody wide-mouth end face inwall, and push rod can only be moved along straight line about the needle tubing wall direction work under external force; Needle tubing wide-mouth end face is provided with convex surface, can prevent that throw-out lever pulls out needle tubing; For preventing to damage because of vibratory impulse makes needle tubing and push rod that bump take place in transit, on vertical (axially) passage of push rod surface guide groove, locking groove is set.

Basic feature of the present utility model is: have directed tooth on (1) needle tubing wide-mouth end face inwall; (2) the push rod surface is provided with the guide groove that accommodates the directed tooth of needle tubing wall; (3) has directed tooth on the push rod front end face inwall; (4) in the needle tubing cavity rotary body is housed, design in its surface has the curve guide groove that accommodates the directed tooth of push rod.

This utility model syringe assembling process and self-destructed disposable are scrapped principle:

Left hand is held needle tubing, the right hand is held push rod, with the directed tooth on the vertical guide groove alignment pins pipe end face inwall on the push rod, make directed tooth snap in guide groove, promote push rod forward, when the rotary body in the push rod front end contact needle tubing, rotating push-rod makes the directed tooth of its end, injects in the lip-deep guide groove of rotary body, promotes push rod to the syringe neck end, the rotation push rod makes its directed tooth snap in the curved section of rotary body guide groove, articulate locking with rotary body, back spur push rod extraction medicinal liquid and go into syringe intracavity, the rotation push rod also back spurred after injection finished, then push rod and rotary body break away from, and syringe lost efficacy and scraps.

Advantage of the present utility model is: after syringe used for the first time, its assembly was all scrapped, thereby safe and reliable, have in addition simple in structure, processing ease, cost of manufacture is cheap, is convenient to advantages such as popularization.

This utility model has following accompanying drawing:

Fig. 1 is this utility model structural principle vertical profile sketch map;

Fig. 2 is this utility model example structure sectional side elevation;

Fig. 3 is the needle tubing structural representation, and figure below is its left view;

Fig. 4 is the pusher structure sketch map, upward is profile, is push rod surface guide groove shape sketch map down;

Fig. 5 is the left and right view at push rod two ends;

Fig. 6 is the rotation body structure sketch map.

Labelling among the figure: 1 is syringe needle, and 2 is needle tubing, and 3 is rubber stopper, 4 is push rod, and 5 is rotary body, and 6 is the anticreep groove on the needle tubing cervical region, 7 is the internal tooth on the syringe needle tail end face inwall, 8 is the directed tooth on the needle tubing wide-mouth end face inwall, and 9 is the lip-deep guide groove of push rod, and 10 is the horizontal locking groove on the guide groove of push rod surface, 11 is the directed tooth on the push rod front end face inwall, 12 is the lip-deep curve guide groove of rotary body, and 13 is the flechette-type back-off of rotary body front end, and 14 is the convex surface on the needle tubing wide mouth part.

Embodiment (Fig. 2): (length is in mm)

Needle tubing (2): make the material polypropylene, long 80mm, preceding eck φ 3.8, back wide-mouth φ 11.9mm, convex surface is dolioform, its high 30mm, wide 10mm, needle tubing cervical region anticreep groove width 1.6mm, high 1.9mm are provided with two symmetric directed teeth 8 at the wide-mouth inwall, height R0.5.

Push rod 4: make the material polypropylene, thick φ 11.7 has two symmetric directed teeth 11 on its front end face inwall, tooth depth R0.5, rear end face φ 16 has two groups of axial symmetric shape guide grooves on the push rod surface, the longitudinal length 53.3 of groove, groove width 0.9, groove depth R0.6.

Rotary body 5: make the material polypropylene, front end flechette-type back-off, its longitudinal length 3.7, neck φ 6.4; The centre connects neck φ 3.1, long by 3.3, rotary body main body garden post φ 8.6, long 17; The surface have two groups axially symmetric closely with M type guide groove, groove width 0.9, groove depth R0.6.

Rubber stopper 3: make material fourth rubber, the back-off and the centre that are sleeved on the rotary body front end connect on the neck, to form hermetically-sealed construction in needle lumen.

Claims

1, a kind of re-use preventing once-used syringe, include syringe needle (1), the needle tubing (2) that is sleeved on needle tubing (2) head and be contained in needle tubing (2) chamber intravital push rod assemblies such as (4) formation, it is characterized in that: have directed tooth (8) on needle tubing (2) the wide-mouth end face inwall; Push rod (4) surface is provided with the guide groove (9) that accommodates the directed tooth of needle tubing wall (8); Has directed tooth (11) on push rod (4) the front end face inwall; In needle tubing (2) cavity rotary body (5) is housed, is provided with the curve guide groove (12) that accommodates the directed tooth of push rod (4) in its surface.

2, according to the described re-use preventing once-used syringe of claim 1, it is characterized in that: the curve guide groove (12) that has on rotary body (5) surface, for along the axial approximate M type guide groove of rotary body; The guide groove (9) that has on push rod (4) surface is for along the axial factory's type guide groove of push rod (4).

3, according to the described re-use preventing once-used syringe of claim 2, it is characterized in that: on the vertical passage of push rod (4) outer surface upper rail (9), the horizontal locking groove (10) that prevents vibratory impulse is set.

4, according to the described re-use preventing once-used syringe of claim 1, it is characterized in that: on syringe needle tail end inwall, have internal tooth (7), on the outer wall of the head and neck position of needle tubing (2), have the anticreep groove (6) that accommodates syringe needle internal tooth (7).