CN200984381Y

CN200984381Y - Disposable safe self-breaking syringe

Info

Publication number: CN200984381Y
Application number: CN 200620101807
Authority: CN
Inventors: 江波
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-20
Filing date: 2006-03-20
Publication date: 2007-12-05
Anticipated expiration: 2016-03-20

Abstract

The utility model relates to a disposable safety self-destroying syringe consisting of a needle and a sheath thereof, a needle tube and a push rod. The push rod is provided with a core tube, and the tail end of a plastic needle base is made to be fork shape; the middle section of the needle base is provided with a step against a spring which has the other end micro-joint sleeved in a spring base out of the needle base; a piston is constantly sleeved at the top of the push rod core tube and micro-joint embedded in a plug core. After the medicine liquid in syringe is injected completely, the plug core is stabbed by the fork top into the push rod core tube, and the needle base is ejected to the inner bottom of the push rod core tube by the elastic force of the spring and inclines toward one side departing the axis. The needle can not extend from the push rod core tube easily, thereby avoiding finger injury and incapability of recycling during syringe application and realizing thorough self-destroying.

Description

A kind of disposable safety self-breaking injector

Technical field:

This utility model belongs to medical apparatus, relates in particular to the improvement of disposable syringe.

Background technology:

Existing plastic injector for temporary use generally need be destroyed, and uses contaminated syringe but destroy these, and hospital need change the expense human and material resources, plastics reproducible utilization in addition, someone just purchases as waste or used plastics to hospital, very easily causes disease propagation, the serious harm health.At this problem, existing many type self-destroyed schemes occur, multiple disposable self-destructing entry needle device technical scheme is disclosed as Chinese patent, one of them is with used syringe needle indentation syringe, can prevent from subsequent processes, to stab finger and cause infectious danger, but the syringe needle of indentation still is in the axial location of syringe, and syringe needle is easy to stretch out outside the tube in transportation, processing procedure, still exists to stab the infected danger of finger.

Summary of the invention:

The purpose of this utility model is a kind of automatic indentation syringe of syringe needle and self-destruction that is difficult for exposing when medicinal liquid is finished by injection of design, safe disposable syringe.

This utility model disposable safety self-breaking injector is made up of syringe needle and sheath thereof, syringe, push rod, it is characterized in that push rod has the core pipe, and the tail end of plastic spike seat is made prong shape; The stage casing of needle holder is shaped on the step that pushes up mutually with spring, and the other end seat of spring is in the multiple spring base outside needle holder of little clutch collar; Piston is placed in push rod core pipe top admittedly and little joint embeds the plug core.

Two jaw top bevels of above-mentioned plastic spike seat tail end prong, and different in size.

Above-mentioned little connected structure is: needle holder is shaped on the little fin of a circle outward and stretches in the spring base, and the plug core is shaped on the little fin of a circle outward and stretches in the push rod core pipe top, and the plug core is that the conical surface engages with the vertical composition surface of push rod core pipe.

Be shaped on the anti-sheet of ruining that links to each other by thin rib in the push rod bottom that pushes away between handle and the syringe tail end.

When this utility model is finished by injection when the syringe medicinal liquid, the plug core is disclosed and is entered in the push rod core pipe by the jaw top, the elastic reaction of the plastic material of two jaws is snapped in by the push rod core pipe top mouth of pipe and shrinks and the spring base disengaging, and needle holder is subjected to the elastic force of spring by directive push rod core pipe inner bottom.To lopsidedness and off-axis, syringe needle is difficult for stretching out in push rod core pipe syringe needle at indentation core Guan Houhui, guarantees to use subsequent process can not stab finger and can't reclaim use again, realizes thorough self-destruction.

Description of drawings:

Structure principle chart when Fig. 1 does not use for this utility model embodiment;

Fig. 2 is a K place partial enlarged drawing among Fig. 1;

Fig. 3 is an A-A place sectional view among Fig. 2;

Fig. 4 is a D place partial enlarged drawing among Fig. 1;

Fig. 5 will soon have injected medicinal liquid for syringe, and jaw touches state diagram timely with the plug core;

The state diagram of Fig. 6 is subjected to spring for needle holder elastic force during by directive push rod core pipe inner bottom.

The specific embodiment:

With reference to Fig. 1-Fig. 4, syringe is made up of syringe needle 8, syringe 2, piston 3 and push rod thereof, and push rod shaft is a core pipe 1, the rail sheet 12 that the core pipe is provided with for quadrature outward, and rail sheet 12 outsides and syringe 2 inwalls are fitted; Syringe needle 8 is with sheath 9, and syringe needle 8 is prefabricated into one with needle holder 5.The tail end of plastic spike seat 5 make prong shape and with piston 3 over against; The stage casing of needle holder 5 is shaped on the step that pushes up mutually with helical spring 6, and the other end seat of spring 6 is in multiple spring base 7 tops outside needle holder 5 of cover; The appearance of needle holder 5 is shaped on a little fin of circle or a little tip surface 5.1, and it is engaged with spring base 7 inwalls to keep spring 6 to be in compressive state.For preventing liquid leakage, a sealing ring 10 is set between needle holder 5 and spring base 7.Push rod core pipe 1 top is with piston 3, and the core pipe 1 vertical mouth of pipe is embedded in plug core 4, and both composition surfaces are that the conical surface engages, so that plug core 4 is easier to enter in the push rod core pipe 1; Plug core 4 appearances are shaped on the little fin 4.1 of a circle, make itself and core pipe 1 inwall keep certain engaging force, enter in the core pipe 1 to avoid filling in core 4 accidents.

Be shaped on the anti-sheet 11 of ruining that is linked to each other by thin rib 11.1 with push rod 1 rear portion between syringe 2 tail ends pushing away handle, anti-sheet 11 two ends of ruining are stuck in and push away between handle and the syringe tail end, push up to limit in the push rod.

During injection, will prevent ruining sheet 11 bendings earlier, and make it enter syringe 2 together with push rod 1; When syringe had soon been injected medicinal liquid, jaw 5.2 touched with plug core 4, as shown in Figure 5; Again push rod 1 is continued sinciput, medicinal liquid is finished by injection, filling in core 4 is simultaneously disclosed and enters in the push rod core pipe 1 by jaw 5.2 tops, then do and ramp effect by the elasticity of two jaws, 5.2 plastic materials, two jaws are snapped in by the push rod core pipe 1 vertical mouth of pipe and shrink, little tip surface 5.1 on it breaks away from spring base 7, and needle holder 5 is subjected to the elastic force of spring 6 by directive core pipe 1 inner bottom together with spring.Because two jaws 5.2 are different in size, syringe needle 8 can be to lopsidedness and off-axis at indentation core pipe 1, as shown in Figure 6.Push away anti-between handle and syringe 2 tail ends and ruin sheet 11 and can when not using, be stuck in and push away between handle and the syringe tail end, make push rod can not in the top, with prevent syringe do not use before just by self-destruction, safety, reliable.

Claims

1, a kind of disposable safety self-breaking injector is made up of syringe needle (8) and sheath (9) thereof, syringe (2), push rod, it is characterized in that push rod has core pipe (1), and the tail end of plastic spike seat (5) is made prong shape; The stage casing of needle holder (5) is shaped on the step that pushes up mutually with spring (6), and the other end seat of spring (6) is in the multiple spring base (7) outside needle holder (5) of little clutch collar; Piston (3) is placed in push rod core pipe (1) top admittedly and little joint embeds plug core (4).

2, disposable safety self-breaking injector according to claim 1 is characterized in that two jaws (5.2) the top bevel of plastic spike seat (5) tail end prong, and different in size.

3, disposable safety self-breaking injector according to claim 1, it is characterized in that little connected structure is: the outer little fin of circle (5.1) that is shaped on of needle holder (5) is stretched in the spring base (7), and the outer little fin of circle (4.1) that is shaped on of plug core (4) is stretched in push rod core pipe (1) top.

4, disposable safety self-breaking injector according to claim 3, it is characterized in that filling in core (4) is that the conical surface engages with the vertical composition surface of push rod core pipe (1).

5, disposable safety self-breaking injector according to claim 1 is characterized in that pushing away handle (1) and is shaped on the anti-sheet (11) of ruining that is linked to each other by thin rib (11.1) with push rod (1) bottom between syringe (2) tail end.