CN2505111Y - Self-destruction type syringe - Google Patents

Abstract

A self-destruction type syringe comprises a needle tube and a handspike, wherein, the top of the handspike is provided with a rubber bolt. The utility model is characterized in that the interior wall on the upper needle tube is provided with protruding rings in the shape of reversed hooks, which can be clipped together with concave rings arranged on the handspike, wherein, a choke block is arranged on the end of the needle tube, and the automatic locking rod on the handspike can contact with the choke block after the infusion ends, thereby making the handspike unable to be drawn out from the needle tube to accomplish the self-locking aim, and additionally preventing the guilty person from recycling the used needle tubes, the utility model is also provided with a positioning safety pin on the end of the needle tube to facilitate the package of the product, thereby not only preventing from the destruction of the syringe caused by the handspike moving forward, but also facilitating the differentiation on whether the syringe is recycled.

Description

Self-destructive syringe

Technical field

This utility model relates to syringe, particularly a kind of can only disposable self-destructive syringe.

Background technology

Current employed syringe, all be referred to as " disposable use ", but it does not demonstrate the result of use of its " disposable " in fact, user before use with use after all arbitrarily dismounting, consumer is difficult to be discerned before the use and the substantive difference after using, reuse after making the syringe dismounting after numerous lawless persons usually will use, influence the result of use of disposable syringe.

Summary of the invention

The purpose of this utility model is to provide a kind of and can makes syringe and push rod self-locking after once using and scrap and can't repeat the self-destructive syringe of reuse automatically;

This utility model comprises needle tubing shell and the push rod that matches with it, and the circumferential inner wall of shell upper has the bulge loop of barb type, and the shell end also has corresponding block; Rubber bolt is equipped with on the push rod top, and is provided with the recess that matches with the barb type bulge loop, and the push rod rear section is furnished with the self-lock rod of at least two～four outwardly-bent certain curvatures, and the shell end has the positioning security tip, and links to each other with putting back-end;

Adopt technique scheme, because the inwall of needle tubing shell has the bulge loop of the barb type of being designed to, when the rubber bolt on the push rod entered the needle tubing top, the recess of its rubber bolt promptly snapped in the bulge loop, can not pull back, and can play self-locking action; The self-lock rod of push rod end also can be inconsistent with needle tubing afterbody tube wall after push rod enters needle tubing, also plays self-locking action; Because the self-lock rod on the push rod has more than two at least, and certain bending is arranged, when self-lock rod pushes the needle tubing end, self-lock rod under elastic reaction with the self-locking of needle tubing wall; And the location of the positioning security tip when being convenient to the packing of product, whether anti-throw-out lever moves forward and syringe is scrapped, also can make consumer be convenient to identification and once use.

Description of drawings

Fig. 1 is the structural representation of this utility model when not using;

Fig. 2 is the structural representation after this utility model uses;

Fig. 3 is another enforcement structural representation of needle tubing shell;

Fig. 4 is the structural representation that self-lock rod distributes on the push rod;

Fig. 5 is the vertical view of self-lock rod end;

Fig. 6 is the structural representation that alignment pin distributes;

The specific embodiment

As shown in Figure 1, this utility model comprises the round needle tubing shell 1 of a hollow, the bulge loop 4 of the upper inside wall barb type of its shell 1, this bulge loop 4 is a circle distribution, make the inside groove of formation on the shell 1, there is inwardly protruded block 6 shell 1 end, and block 6 also is circle distribution; Push rod 2 tops are connected to rubber bolt 3, be provided with scrobicular ring 5 between rubber bolt 3 and the push rod 2, it can fasten with the bulge loop 4 on the shell 1, push rod 2 rear ends are provided with the self-lock rod 8 of four outwardly-bent 30 degree, the positioning security tip 7 one ends link to each other with the end of needle tubing shell 1, the other end and push rod (2) end joins, can shell 1 is fixing with push rod 2.

As shown in Figure 2, during use, with the positioning security tip 7 switch outs, push rod 2 pulls back, and liquid promptly enters in the needle tubing from syringe needle, when needs are injected, push rod 2 is promoted forward, liquid penetrates from syringe needle, when injection finishes, after push rod 2 enters needle tubing fully, this moment, push rod 2 vertical rubber bolt 3 were touched mutually with the needle tubing top, and scrobicular ring 5 on the push rod 2 and the barb-shaped bulge loop 4 on the needle tubing shell 1 fasten mutually, and push rod 2 can not be pulled back, and reach the self-locking purpose; Four self-lock rods 8 at push rod 2 rear portions are after entering needle tubing, because it is designed to the bending of 30 degree, under the effect of elasticity of plastics, the end points of self-lock rod 8 contacts mutually with block 6 on the needle tubing shell 1, make push rod further reach self-locking, realize disposable effect, the dome on the push rod 2 is after push rod enters needle tubing fully, the space that is about on the block 6 covers, and further finishes the effect of sealing and self-locking.

As shown in Figure 3, needle tubing shell 1 also can be the straight tube shape, and barb-shaped bulge loop 4 is arranged on its inwall, and the scrobicular ring 5 on it and the push rod 2 fastens mutually.

As shown in Figure 4, be distributed with four bandy self-lock rods 8 on the push rod 2, its crooked angle is 35 ° ± 5 °.

As shown in Figure 5, after push rod 2 enters needle tubing, dome 9 automatic shifts on its self-lock rod 8 ends, after injection finished, dome 9 just in time was covered with on the round mouth of needle tubing shell 1 end, prevented remaining liquid spill.

As shown in Figure 6, the positioning security tip 7 respectively with needle tubing shell 1 end, push rod 2 ends join, when not using, this positioning security tip 7 plays the role of positioning, and is convenient to the packed and transported needs behind the production, can prevent that needle tubing and push rod from misplacing accidentally, causes syringe to be scrapped; Whether can make consumer pick out syringe in addition once used.

Self-lock rod 8 on this utility model push rod 2 can be designed as two～four, and visual product specification is done correspondingly to increase progressively or successively decrease.

Claims (4)

1, a kind of self-destructive syringe comprises the needle tubing shell (1) of hollow circular tube and the push rod (2) that matches with it, and the top of push rod (2) is connected to rubber bolt (3), it is characterized in that:

A: the inwall on needle tubing shell (1) top is provided with the bulge loop (4) of barb type, and also is provided with corresponding block (6) on the terminal circumference of needle tubing shell (1);

B: push rod (2) upper end is provided with the scrobicular ring (5) that matches with bulge loop (4) on the needle tubing shell (1), and push rod (2) rear section is furnished with at least two～four bandy self-lock rods (8).

2, according to the described self-destructive syringe of claim 1, it is characterized in that: the end of described needle tubing shell (1) is connected to a location safe tip (7), and links to each other with push rod (2) rear portion.

3, self-destructive syringe according to claim 2 is characterized in that: the bandy angle of described self-lock rod (8) is for changeing 30 °-45 ° counterclockwise with the axis starting point.

4, self-destructive syringe according to claim 3 is characterized in that: described from phase-locked (8) the terminal coaxial dome (9) that is provided with, this dome (9) can be fastened on the needle tubing shell (1).

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