CN2503902Y

CN2503902Y - Disposable syringe

Info

Publication number: CN2503902Y
Application number: CN 01253867
Authority: CN
Inventors: 张文工
Original assignee: Individual
Current assignee: Xu Guiqin
Priority date: 2001-09-25
Filing date: 2001-09-25
Publication date: 2002-08-07
Anticipated expiration: 2011-09-25

Abstract

The utility model relates to a medical used injection syringe, in particular relates to a one-off injection syringe. The utility model solves the defect that the structure of existing injection syringe can be used repeatedly, and the utility model comprises a syringe and a pushing rod. The utility model is characterized in that the inner surface of the tail end of the syringe is provided with a syringe non return thorn ring, a pushing rod non return thorn ring which has an opposite direction of the syringe non return thorn ring is arranged at the position where the pushing rod is corresponded with the syringe return preventing thorn ring, one to three groups of the non return thorn rings can be provided. The pushing rod is a hollowed cylinder, the end part of the pushing rod is orderly connected with a piston support and a piston head, and the piston head is suited with the piston support. The piston support can be of structure like Chinese character wang, one end of the piston support is suited with the piston head, and the other end is locked in the inner wall of the cavity of the pushing rod. The piston support also can be H-shaped, one end of the piston support is suited with the piston head, the other end is of square shape with an opening, and a T-shaped overhanging object at the front end of the pushing rod is locked at the other end of the piston support. A brand connecting piece which is positioned at the tail end of the syringe is connected with the pushing rod. The utility model can be used for the one-off medical used injection syringe in various injections.

Description

Not re-usable disposable syringe

One, technical field

This utility model relates to a kind of injector for medical purpose, particularly a kind of not re-usable disposable syringe.

Two, background technology

Since the disposable plastic injector for medical purpose 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.

Three, 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: not re-usable disposable syringe, comprise syringe and push rod, it is characterized in that: have syringe non-return coronule at syringe afterbody inner surface, the position corresponding with syringe non-return coronule has 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 connects piston holder, piston head successively, and piston head is socketed in the piston holder.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 has opening, the T type outthrust clamping of push rod front end is wherein.The trade mark connector that is connected with push rod is arranged 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 use of syringe after feasible the use.In addition, owing to increased the anti-false trademark of disposable breaking-up, fundamentally stopped reusable probability.

Four, description of drawings Fig. 1 is that this utility model embodiment 1 structural representation Fig. 2 is among this utility model embodiment 2 structural representation figure: 1-syringe needle, 2-syringe, 3-push rod, the 4-piston head, the holder of 5-piston, 6 (1), 6 (2)-push rod non-return coronules, 7-syringe non-return coronule, 8-trade mark connector.

Five, the specific embodiment

Embodiment 1: with reference to Fig. 1, not re-usable disposable syringe, comprise syringe and push rod, push rod is a hollow cylinder, have syringe non-return coronule 7 at syringe 2 afterbody inner surfacies, the position corresponding with syringe non-return coronule has the push rod non-return coronule 6 opposite with syringe non-return coronule direction on the push rod 3, and push rod non-return coronule is 2 groups.The end of push rod 3 connects 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 cavity inner wall of push rod 3.The trade mark 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 trade mark 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, contact with piston head 4 again, promote piston head and carry 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, when liquid has all been injected, push rod non-return coronule 6 (2) 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.It is to prevent that operator from stopping injection and reusing this syringe at the still surplus small amount of liquid of syringe that push rod is provided with two groups of non-return coronules.

Embodiment 2: 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 has opening, the T type outthrust clamping of push rod 3 front ends is wherein.All the other are identical with embodiment 1.

Claims

1, not re-usable disposable syringe, comprise syringe and push rod, it is characterized in that: have syringe non-return coronule at syringe afterbody inner surface, the position corresponding with syringe non-return coronule has the push rod non-return coronule opposite with syringe non-return coronule direction on the push rod, the end of push rod connects piston holder, piston head successively, and piston head is socketed in the piston holder.

2, not re-usable disposable syringe according to claim 1 is characterized in that: the non-return coronule can have the 1-3 group.

3, not re-usable 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 cavity inner wall of push rod.

4, not re-usable disposable syringe according to claim 1, it is characterized in that: the piston holder is I shape, an end and piston head socket, the other end is the hollow that has opening, the T type outthrust clamping of push rod front end is wherein.

5, not re-usable disposable syringe according to claim 1 is characterized in that: the trade mark connector that is connected with push rod is arranged at the syringe afterbody.