CN2265198Y

CN2265198Y - Disposable syringe

Info

Publication number: CN2265198Y
Application number: CN 96216578
Authority: CN
Inventors: 王世全
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-02
Filing date: 1996-07-02
Publication date: 1997-10-22
Anticipated expiration: 2006-07-02

Abstract

The utility model provides a disposable syringe. Two symmetric convex top needles are arranged on the top part of a piston, concave easy openings corresponding to the convex top needles are arranged on the top part of a syringe cylinder, and the convex top needles and the concave easy openings can be accurately aligned by a guide positioning structure which is arranged on the syringe cylinder and the piston. When the utility model is used, the piston is pushed according to set direction, and the convex top needles are accurately aligned at the concave easy openings. When physic liquor is injected, the convex top needles of the piston are pushed away by the concave easy openings of a syringe tube. Thereby, the purpose that the utility model is automatically destroyed after use is realized, and the utility model can not be recovered and used repeatedly.

Description

Disposable syringe

This utility model relates to a kind of medical apparatus, specifically a kind of disposable syringe.

Conventional injector roughly has two types, a kind of is glass syringe, and this syringe can use after high-temperature sterilization repeatedly, but often sternly or certainly be not good at because of sterilization, the viral communication that remains on the syringe is given used the patient, another kind is a plastic injector, disposable use, do not need high-temperature sterilization during use, but since excellent with the back, easily reclaimed use by illegal person, stay hidden danger to viral communication.

It is a kind of with the disposable syringe of back from destruction that the purpose of this utility model is to provide.

The technical solution of the utility model is, 2 easy openings of symmetric matrix are arranged at the top of syringe cylinder, and 2 convex thimbles corresponding with the easy opening of syringe cylinder matrix are arranged at the top of piston, on syringe and the piston positioning guiding structure are arranged.

Said positioning guiding structure can for: syringe and piston are oval structure, advance so that press certain orientation in piston, make the convex thimble of piston rod and the easy opening of the matrix on the syringe accurately para-position coincide.。

Said positioning guiding structure can also for: on column type syringe cylinder and piston rod, be respectively equipped with the concave-convex type feather key and the groove that can make convex thimble and the accurate para-position of the easy opening of matrix.

Fig. 1 is the structural representation of embodiment 1 of the present utility model;

Fig. 2 is the structural representation of embodiment 2 of the present utility model;

Fig. 3 is the profile of Fig. 2.

Below in conjunction with accompanying drawing this utility model is described in further detail:

Among Fig. 1, the convex thimble 5 of 2 symmetries, 180 degree is established at the top of the piston 2 of column type, and the top of the syringe cylinder 1 of column type has and the easy opening 6 of piston convex thimble 5 corresponding matrixs; Easily the wall of opening 6 is thinner than the wall of syringe cylinder, the pressure when making it to bear injecting liquid drug.Can aim at the easy opening of matrix 6 positions of needle tubing for the convex thimble 5 that makes piston, the inwall of syringe cylinder is established the convex feather key 3 of two symmetries, 180 degree, establish the matrix gathering sill 4 of two symmetries, 180 degree on the piston 2, its piston is pushed ahead by the direction of setting, thimble 5 can be aimed at easy opening 6 exactly, when injecting liquid drug finished, the convex thimble 5 of piston backed down the easy opening 6 of matrix of syringe tube, thereby realized the purpose with the back self-destruction.

Among Fig. 2, the convex thimble 9 of 2 symmetries, 180 degree is arranged at the top of disciform piston 7, and the top of the syringe cylinder 8 of the ellipse garden type that is used with it has and the easy opening 10 of convex thimble 9 corresponding matrixs, and the wall of the easy opening 10 of matrix is thinner than the wall of the tube of syringe.Disciform structure plays the positioning and guiding effect, makes piston advance by design direction, and when injecting liquid drug finished, the convex thimble 9 of piston backed down the easy opening 10 of matrix of syringe cylinder, realizes the purpose with the back self-destruction.

Fig. 3, piston 7, syringe cylinder 8.

The utility model compared with prior art has easy manufacturing processing, does not increase cost, uses easy and simple to handle, usefulness Rear from destroying, can't reclaim the advantages such as use.

Claims

1, a kind of disposable syringe is characterized in that 2 convex thimbles (5) are arranged at the top of piston (2); The top of syringe cylinder (1) has and the easy opening of the corresponding matrix of convex thimble (5) (6); Have on syringe cylinder (1) and the piston (2) and can make the easy opening of convex thimble and the matrix positioning guiding structure of para-position mutually.

2, syringe as claimed in claim 1, it is characterized in that said positioning guiding structure can for: syringe cylinder and piston are ellipse.

3, want 1 described syringe as right, it is characterized in that said positioning guiding structure can also for: the made piston that mutually coincide is arranged along the propulsive positioning and guiding keyway of this direction on the syringe barrel of column type and the piston rod.