CN2865719Y

CN2865719Y - Self-locking self-destroying injector

Info

Publication number: CN2865719Y
Application number: CN 200520099727
Authority: CN
Inventors: 彭义兴; 郑金露
Original assignee: JIANGXI SANXIN MEDICAL DEVICES GROUP CO Ltd
Current assignee: Jiangxi Sanxin Medtec Co., Ltd
Priority date: 2005-12-26
Filing date: 2005-12-26
Publication date: 2007-02-07
Anticipated expiration: 2015-12-26

Abstract

The utility model relates to a self-locking and self-devastating syringe in the technical field of medical appliance. The groupware of the utility model includes the external sleeve, core rod, piston, snap ring and syringe needle. The utility model is characterized in that: the self-locking snap ring is installed at the entrance of the external sleeve; the chuck of the core rod is set at appropriate position, so that the timing for the self-devastation of syringe can take effect after the injection of medical fluid. Before the self-devastation, the operation of medicine pumping, evacuation and injection in this utility model is identical completely with ordinary syringe. After the completion of self-devastation, the core rod will be broken and the piston and the residual core rod are placed inside the external sleeve, so that the syringe can not be reused. This utility model, with simple structure and convenient fabrication and assembly, can be put for large-scale automatic manufacturing.

Description

Self-locking type self-breaking syringe

Technical field

This utility model relates to medical apparatus and instruments, particularly self-locking type self-breaking syringe.

Technical background

The use of self-destructive syringe more and more widely, the patent that a lot of safety self-destructive syringes are also arranged, the sealed self-destruction syringe of a kind of slip is disclosed as special 03224348.0, aborning, the self-locking tablet quality instability that its metal material is made, assembling can not realize automatization, self-destroyed syringe comes into force after taking out medicine at once simultaneously, be unfavorable for taking out the operations such as emptying behind the medicine, the nurse uses inconvenience.

Summary of the invention

The purpose of this utility model is to solve above-mentioned serviceability aspect, and produce in batches can not automatization etc. deficiency, propose to adopt isolating snap ring self-locking structure, and self-destruction comes into force opportunity after having injected medicinal liquid.It is a kind of simple in structure that this utility model provides, and medical worker's use habit is constant, uses back syringe core rod and overcoat self-locking and can not reusable self-locking type self-breaking syringe.

The purpose of this utility model is achieved in that a kind of self-locking type self-breaking syringe, and it is made up of core bar, snap ring, overcoat, piston and entry needle.It is characterized in that location by bulge loop and groove, snap ring is installed in the porch of overcoat, chuck on the core bar is slightly shorter to the length L 1 of the bottom of overcoat than claw to the length L 2 of the step of piston, claw just blocks chuck behind the intact medicinal liquid of injector to inject, so that after having injected medicinal liquid, come into force the opportunity of syringe self-destruction, before self-destruction came into force, it is just the same that it takes out medicine, emptying, injection operation and conventional type syringe.After self-destruction came into force, bending core bar, core bar be in the fracture of its weakness, and the residual fraction of piston and core bar is retained in the overcoat, and syringe can not be used again, and realizes self-destroying function.

Below in conjunction with drawings and Examples this utility model is further described:

Description of drawings

Fig. 1 is this utility model structure assembling sketch map.

Fig. 2 for this utility model injecting liquid drug finish after the self-destruction view.

Fig. 3 is this utility model part sketch map.

Fig. 4 is the position dimension sketch map of claw chuck.

Specific embodiment

As shown in Figure 1, this utility model component parts is: core bar 1, snap ring 2, overcoat 3, piston 4 and entry needle 5.By the location of bulge loop 8 and groove 10, snap ring 2 is installed in the porch of overcoat 3, and the claw 9 of snap ring 2 has certain elasticity, and the chuck 7 of core bar 1 is slightly shorter to the length L 1 of the bottom 11 of overcoat 3 than claw 9 to the length L 2 of the step 12 of piston 4.

Syringe is before all injecting liquid drugs are finished, and chuck 7 can not enter into claw 9 and overcoat 3 inside, syringe take out medicine, emptying and action of injection and the conventional type syringe is identical.After core bar (1) was pushed into overcoat 3 bottoms fully, injecting liquid drug was finished, and chuck 7 struts the elastic claw 9 of tool and enters overcoat 3 inside, and claw 9 returns to its original position under the elasticity of himself, block chuck 7, caused core bar 1 not extract out from overcoat 3.Bending core bar 1, core bar be in 6 fractures of its weakness, and the residual fraction of piston 4 and core bar 1 is retained in the overcoat 3, and syringe can not be used again, and realizes self-destroying function.

Claims

1, a kind of self-locking type self-breaking syringe, its component parts is: core bar (1), snap ring (2), overcoat (3), piston (4) and entry needle (5), it is characterized in that location by bulge loop (8) and groove (10), snap ring (2) is installed in the porch of overcoat (3), chuck (7) on the core bar (1) is slightly shorter to the length L 1 of the bottom (11) of overcoat (3) than claw (9) to the length L 2 of the step (12) of piston (4), claw (9) just blocks chuck (7) behind the intact medicinal liquid of injector to inject, so that after having injected medicinal liquid, come into force the opportunity of syringe self-destruction, before self-destruction came into force, core bar was provided with weakness (6).