CN2683155Y

CN2683155Y - Disposable syringe

Info

Publication number: CN2683155Y
Application number: CN 200320107482
Authority: CN
Inventors: 周桂芝; 付玉梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-08
Filing date: 2003-12-08
Publication date: 2005-03-09
Anticipated expiration: 2013-12-08

Abstract

The utility model relates to a medical injector, in particular to a disposable injector, which solves the technological problem that the structure of the existing disposable injector has the reusable defect, and comprises a syringe, a push rod, a syringe check puncture ring and a push rod check puncture ring. The inner surface of the tail of the syringe is provided with the syringe check puncture ring. The push rod check puncture ring which is in the opposite direction of the syringe check puncture ring is arranged on the position which is corresponding to the syringe check puncture ring on the push rod. The check puncture ring can have one group, two groups or three groups. The push rod is a hollow cylinder. The end of the push rod is connected with a piston bracket and a piston head one after another. The piston head is sheathed with the piston bracket. The piston bracket can be a structure which looks like a Chinese character 'wang'. One end of the piston bracket is sheathed with the piston head, and the other end of the piston bracket is clamped with the inner wall of the cavity of the push rod. The piston bracket also can be a structure which looks like a Chinese character 'gong'. One end of the piston bracket is sheathed with the piston head, and the other end of the piston bracket is a structure which looks like a Chinese character 'kou' with an opening in which a T-shaped protrusion object on the front end of the push rod is clamped. The tail of the syringe is provided with an anti-counterfeiting mark connector which is connected with the push rod. The utility model can be used in various disposable medical injectors in the course of injection.

Description

Disposable syringe

Technical field: this utility model relates to a kind of injector for medical purpose, particularly a kind of disposable syringe.

Background technology: since plastic injector for temporary use is promoted the use of, for injection has brought convenience and safety, but because this syringe structurally exists reusable shortcoming, some lawless person reclaims used disposable syringe, after simple packing, sell again, society is caused serious harm.

Summary of the invention: this utility model technical issues that need to address are: there is reusable defective in the structure that solves existing disposable syringe, and a kind of not re-usable disposable syringe is provided.

The technical solution of the utility model is: it comprises syringe and push rod, it is characterized in that: be provided with syringe non-return coronule at syringe afterbody inner surface, the position corresponding with syringe non-return coronule is provided with the push rod non-return coronule opposite with syringe non-return coronule direction on the push rod, and the non-return coronule can have the 1-3 group; The end of push rod links piston holder, piston head successively, and piston head is socketed in the piston holder, and push rod is a hollow cylinder, and the piston holder can be king's word structure, an end and piston head socket, and the other end is connected to the cavity inner wall of push rod; The piston holder also can be I shape, an end and piston head socket, and the other end is the hollow that is provided with opening, the T type outthrust clamping of push rod front end is wherein; Be provided with the anti-false trademark connector that is connected with push rod at the syringe afterbody.

The beneficial effects of the utility model are: because this utility model is provided with the non-return coronule on syringe and push rod, and be provided with the piston holder of the scalable slip of scalable push rod length, can shift piston head onto the end on the one hand, on the other hand, before use, make push rod non-return coronule be in the outside of syringe non-return coronule.In use, when push rod was shifted the end onto, syringe non-return coronule and push rod non-return coronule interlocked locked, the not reproducible reuse of syringe after feasible the use.In addition, owing to increased the anti-false trademark of disposable breaking-up, fundamentally stopped reusable probability.

Description of drawings: Fig. 1 is this utility model embodiment 1 structural representation;

Fig. 2 is this utility model embodiment 2 structural representations.

Among the figure 1, syringe needle 2, syringe 3, push rod 4, piston head 5, piston holder, 6 (1), 6 (2), push rod non-return coronule 7, syringe non-return coronule 8, anti-false trademark connector

Specific embodiment embodiment 1: with reference to Fig. 1, this utility model disposable syringe, comprise syringe 2 and push rod 3, push rod 3 is a hollow cylinder, be provided with syringe non-return coronule 7 at syringe 2 afterbody inner surfacies, push rod 3 and syringe non-return coronule 7 corresponding positions are provided with the push rod non-return coronule 6 opposite with syringe non-return coronule 7 directions, and push rod non-return coronule 6 is 2 groups; The end of push rod 3 links piston holder 5, piston head 4 successively, and piston head 4 is socketed in the piston holder 5.Piston holder 5 is king's word structure, an end and piston head 4 sockets, and the other end is connected to the inwall of push rod 3 cavitys; The anti-false trademark connector 8 that is connected with push rod 3 is arranged at syringe 2 afterbodys.Its work process is as follows: during drawing liquid, break anti-false trademark connector 8, push rod 3 spurs piston holders 5 and drives piston head 4 and upwards sucks liquid by syringe needle 1, with reference to Fig. 1 the latter half, during injection, push rod 3 will slip over one section idle running, contacts with piston head 4 again, promotes piston head and carries out normal injection, when remaining liquid not for a long time, push rod non-return coronule 6 (1) is crossed syringe non-return coronule 7, and the push rod tail end also embeds in the recess of syringe afterbody, and syringe is by locked.

Embodiment 2: according to embodiment 1, with reference to Fig. 2, piston holder 5 also can be I shape, an end and piston head 4 sockets, and the other end is the hollow that is provided with opening, the T type outthrust clamping of push rod 3 front ends is wherein.

Claims

1, a kind of disposable syringe, comprise syringe and push rod, it is characterized in that: be provided with syringe non-return coronule at syringe afterbody inner surface, the position corresponding with syringe non-return coronule is provided with the push rod non-return coronule opposite with syringe non-return coronule direction on the push rod, the end of push rod links piston holder, piston head successively, and piston head is socketed in the piston holder.

2, disposable syringe according to claim 1 is characterized in that: the non-return coronule can have the 1-3 group.

3, disposable syringe according to claim 1 is characterized in that: push rod is a hollow cylinder, and the piston holder is king's word structure, an end and piston head socket, and the other end is connected to the push rod cavity inner wall.

4, disposable syringe according to claim 1 is characterized in that: the piston holder is I shape, an end and piston head socket, and the other end is the hollow that has opening, the T type outthrust clamping of push rod front end is wherein.

5, disposable syringe according to claim 1 is characterized in that: be provided with the anti-false trademark connector that is connected with push rod at the syringe afterbody.