CN1272078C

CN1272078C - Self-ruined disposable syringe

Info

Publication number: CN1272078C
Application number: CN 03114652
Authority: CN
Inventors: 马雅素; 李士才
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-18
Filing date: 2003-04-18
Publication date: 2006-08-30
Anticipated expiration: 2023-04-18
Also published as: CN1454674A

Abstract

The present invention relates to a self-destroyed type disposable syringe which comprises a fluid pushing barrel matched with a needle barrel and a needle head arranged on the front end of the needle barrel, wherein the front end of the needle barrel is also provided with a needle holding sleeve rod for installing the needle head, the needle holding sleeve rod is connected with the needle barrel by a film plastic ring and a hook, the front end of the needle holding sleeve rod is also provided with a spring sleeve barrel and a spring which is arranged in the spring sleeve barrel, and the front end of the fluid pushing barrel is provided with an upper cutting ring. Because the present invention is provided with the spring sleeve barrel and the spring on the front end of the needle barrel and the upper cutting ring is arranged on the front end of the fluid pushing barrel, the retract of the needle head of the syringe is realized after used, the self destroying of the syringe is achieved, and consequently, the safety of the syringe is enhanced. When the present invention is used, the fluid pushing barrel is extruded to complete injection. The fluid pushing barrel is continuously and forwards extruded, the upper cutting ring cuts the film plastic ring between the needle holding sleeve rod and the needle barrel to brace the hook, the needle holding sleeve rod and the needle head enter the fluid pushing barrel under the action of the spring, and needle withdrawal is automatically completed.

Description

A kind of Self-ruined disposable syringe

One, technical field

The invention belongs to medical instruments field, particularly a kind of Self-ruined disposable syringe.

Two, background technology

Now a kind ofly on the syringe that uses clinically after sterilization, can be repeatedly used, use once though only advocate, but since its use after being kept perfectly property still, still can reuse, in repeated use as because of the sterilization imprecision, will cause the cross infection various diseases, domestic so far also always at this syringe needle of extensive use.Also there is not at present a kind of novel not re-usable disposable syringe.

Three, summary of the invention

The object of the present invention is to provide a kind of simple in structure, syringe needle can bounce back Self-ruined disposable syringe safe in utilization.

For achieving the above object, the technical solution used in the present invention is: comprise the syringe needle that pushes away fluid cylinder and be arranged on the syringe front end that matches with syringe, be characterized in, the front end of syringe also be provided with syringe needle is installed hold the needle guard bar, holding the needle guard bar is connected with syringe with hook by the plastic film ring, also be provided with spring spool at the front end of holding the needle guard bar, in spring spool, be provided with spring, be provided with sealing ring and cut ring on corresponding at the front end that pushes away fluid cylinder with plastic film ring and hook, at the front end that pushes away fluid cylinder thin layer is set also, and is provided with and the corresponding incision ring of thin layer in the rear end of holding the needle guard bar.

Another characteristics of the present invention are: the end that pushes away fluid cylinder is provided with the pushing cylinder medicated cap, the pushing cylinder medicated cap is provided with relieving ring, after the end of syringe is set with syringe, overlap, and the internal diameter that overlaps behind the syringe is less than the external diameter that pushes away fluid cylinder forward end seal ring, puts behind the syringe and also be provided with and the corresponding groove of relieving ring; Hook is an overall structure with spring spool.

Because the present invention is provided with spring spool and spring at the front end of syringe, is provided with at the front end that pushes away fluid cylinder and cuts ring, has realized the retraction of syringe needle after use, syringe has been reached certainly decrease, thus the safety that has improved syringe.

Four, description of drawings

Fig. 1 is the structural representation of the embodiment of the invention 1;

Fig. 2 is the structural representation of the embodiment of the invention 2.

Five, the specific embodiment

Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are described in further detail.

Embodiment 1, referring to Fig. 1, the present invention includes the syringe needle 2 that pushes away fluid cylinder 4 and be arranged on syringe 1 front end that matches with syringe 1, the front end of syringe 1 also be provided with syringe needle 2 is installed hold needle guard bar 10, holding needle guard bar 10 is connected with syringe 1 with hook 12 by plastic film ring 11, also be provided with spring spool 7 and the spring 6 that is arranged in the spring spool 7 at the front end of holding needle guard bar 10, spring spool 7 and hook 12 are an overall structure, pushing away fluid cylinder 4 is a hollow structure, its front end is provided with plastic film ring 11 and hook 12 cuts ring 5 on corresponding, the front end that pushes away fluid cylinder 4 is provided with diaphragm seal 17, the front end that pushes away fluid cylinder 4 also is provided with sealing ring 14, in order to prevent in transporting procedures, to damage syringe, be provided with pushing cylinder medicated cap 9 at the end that pushes away fluid cylinder 4, pushing cylinder medicated cap 9 is provided with relieving ring 15, after also being set with syringe, end in syringe 1 overlaps 8, and the internal diameter of cover 8 is less than the external diameter that pushes away fluid cylinder 4 forward end seal rings 14 behind the syringe, make and push away fluid cylinder 4 and can not break away from syringe 1, cover 8 is provided with and relieving ring 15 corresponding grooves 16 behind the syringe, in assembling process, to push away fluid cylinder 4 earlier and push syringe 1, cover 8 behind the syringe is inserted in syringe 1 through pushing away fluid cylinder 4, pushing cylinder medicated cap 9 embeds and pushes away fluid cylinder 4 ends, the relieving ring on the pushing cylinder medicated cap 9 15 is filled in the groove 16 of cover 8 behind the syringe; Spring 6 and spring spool 7 successively are inserted in syringe needle 2.

Embodiment 2, and referring to Fig. 2, the front end that pushes away fluid cylinder 4 in this example is provided with thin layer 13, and are provided with and thin layer 13 corresponding incision rings 3 in the rear end of holding needle guard bar 10, and other structure is with embodiment 1.

Operation principle of the present invention is as follows: in use, tear the encapsulation bag, remove the protective sleeve of syringe needle 2, in medicinal liquid suction syringe 1, at this moment relieving ring 15 ejects automatically, and relieving ring 15 is torn, and syringe needle 2 thrusts human body, extruding pushes away fluid cylinder 4, finish injection, continuation will push away fluid cylinder 4 and push forward, make to overlap behind pushing cylinder medicated cap 9 and the pin to collide, in this process, on cut ring 5 and cut off the plastic film ring 11 hold between needle guard bar 10 and the syringe 1, and will link up with 12 and strut, spring 6 is pushed the thin layer 13 that diaphragm seal 17 or 3 cut-outs of incision ring push away fluid cylinder 4 front ends open, thereby make and hold needle guard bar 10 and syringe needle 2 and enter and push away in the fluid cylinder 4, finish and pull out pin automatically; Because the stopping of pushing cylinder medicated cap 9, what the syringe needle 2 of retraction can not break away from syringe pushes away fluid cylinder 4.

Claims

1, a kind of Self-ruined disposable syringe, comprise the syringe needle [2] that pushes away fluid cylinder [4] and be arranged on syringe [1] front end that matches with syringe [1], it is characterized in that: the front end of syringe [1] also be provided with syringe needle [2] is installed hold needle guard bar [10], holding needle guard bar [10] is connected with syringe [1] with hook [12] by plastic film ring [11], also be provided with spring spool [7] at the front end of holding needle guard bar [10], in spring spool [7], be provided with spring [6], be provided with sealing ring [14] and with plastic film ring [11] with link up with [12] and cut ring [5] on corresponding at the front end that pushes away fluid cylinder [4], at the front end that pushes away fluid cylinder [4] thin layer [13] is set also, and is provided with and the corresponding incision ring of thin layer [13] [3] in the rear end of holding needle guard bar [10].

2, Self-ruined disposable syringe according to claim 1, it is characterized in that: the said end that pushes away fluid cylinder [4] is provided with pushing cylinder medicated cap [9], pushing cylinder medicated cap [9] is provided with relieving ring [15], cover [8] after the end of syringe [1] is set with syringe, and the internal diameter of cover [8] also is provided with and the corresponding groove of relieving ring [15] [16] on the cover [8] behind the syringe less than the external diameter that pushes away fluid cylinder [4] forward end seal ring [14] behind the syringe.

3, Self-ruined disposable syringe according to claim 1 is characterized in that: said hook [12] is an overall structure with spring spool [7].