CN2698368Y

CN2698368Y - Disposable self destructing syringe

Info

Publication number: CN2698368Y
Application number: CN 200420050493
Authority: CN
Inventors: 林作钱
Original assignee: Individual
Current assignee: Tan Feiyan
Priority date: 2004-05-08
Filing date: 2004-05-08
Publication date: 2005-05-11
Anticipated expiration: 2014-05-08

Abstract

The utility model relates to a disposable self destructing syringe, which comprises a hollow needle tube, a core rod and a piston. A needle seat with a needle is positioned at the front end of the hollow needle tube; the non-return teeth in the shape of sawtooth are positioned at the core rod; a non-return fastener is arranged between the inner wall of the hollow needle tube and the core rod. During the injection process of liquid medicine, the non-return fastener, moving forward by the non-return teeth and the inner buckle along the core rod, and the piston enter the front end of the hollow needle tube. When the injection finished, the prong of the non-return fastener is stuck by the inner wall of the hollow needle tube and the inner buckle of the non-return fastener is stuck inside the non-return teeth that the core rod can not be withdrawn so as to achieve the purpose of self-destructing operation and realize the effect of disposable use.

Description

A kind of disposable self-destruction syringe

Technical field

This utility model relates to a kind of self-destruction syringe, the syringe that particularly a kind of self-destructed disposable uses.

Background technology

Self-destruction syringe of the prior art, it is by a hollow needle tubing, core bar, piston and prevent that the device that piston is return from forming.As Chinese patent publication number CN2576252Y, open day on October 1st, 2003, the name of innovation and creation is called re-use preventing once-used syringe, this application case discloses a kind of re-use preventing once-used syringe, it mainly comprise injection tube, cross push rod, the piston of cross push rod front end, between injection tube inwall and cross push rod wall flexure strip and at the retaining of the flexure strip retaining on the push rod and between the flexure strip, flexure strip is converted into the cross section and is The groove of shape flexure strip is stuck on the spine of cross push rod, the blade that stretch its both sides is attached on other two continuous spines of push rod, 3 of the afterbody of flexure strip are claw-like, its weak point is not have the secure fit device between flexure strip and push rod, flexure strip breaks away from the push rod distortion easily, can not realize the self-destruction effect.

The utility model content

Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, and a kind of simple in structure, easy to process, re-use preventing once-used syringe that self-destruction is effective is provided.

A kind of disposable self-destruction syringe that provides according to this utility model, comprise that it is the piston that criss-cross core bar and is installed in described core bar front end that a hollow needle tubing, is installed in the interior cross section of described hollow needle tubing, the front end of described hollow needle tubing is installed a needle stand, one syringe needle is installed on the described needle stand, it is characterized in that, be formed with locking tooth on the described core bar, described locking tooth be shaped as zigzag, be provided with locking card between described hollow needle inside pipe wall and cross core bar, described locking card can be along core bar and the unidirectional syringe needle direction that slides to of hollow pipe inwall.

A kind of disposable self-destruction syringe that provides according to this utility model also has following attached technical characterictic:

Described locking tooth be shaped as zigzag.

Described locking card is made of with an end plate that is connected biside plate the biside plate that is parallel to each other, be formed with an outward extending prong on the described end plate, biside plate respectively is formed with button in the sharp edge shape, and the sensing of described prong and interior button is opposite with needle-like, detains in described with locking tooth on the core bar and matches.

The hypotenuse of described locking tooth becomes 10 ° to 30 ° angles with the core bar centrage.

Described prong be protrude from end plate outer with end plate be the hollow triangle of one, described prong is pressed on the inwall of hollow pipe.

Described prong becomes 20 ° to 40 ° angles with a described end plate plane.

Described end plate and biside plate are substantially rectangle.

A kind of disposable self-destruction syringe that provides according to this utility model compared with prior art has following advantage: button matches with the zigzag locking tooth that is shaped as that is shaped on the core bar in being formed with on the locking card of the present utility model, prong on the locking card is close to the inwall of hollow pipe, when liquid medicine injection, locking card moves ahead under the effect of locking tooth and interior button along core bar, itself and piston enter hollow needle tubing front end together, after injecting liquid drug finishes, prong on the locking card blocks on the hollow pipe inwall, interior button on the locking card is stuck in the locking tooth, can not move backward, thereby reach the self-destruction operation, realize disposable effect, simple in structure, easy to process, also be beneficial to operation, have reasonable promotional value.

Description of drawings

Fig. 1 is this utility model structural representation.

Fig. 2 is this utility model locking card front view.

Fig. 3 is this utility model locking card sectional view.

Fig. 4 is this utility model locking card upward view.

Fig. 5 is that this utility model uses the back view.

Fig. 6 is the A-A cutaway view Amplified image among Fig. 1.

Fig. 7 is the B place enlarged drawing of Fig. 1.

Fig. 8 is the C place enlarged drawing of Fig. 5.

The specific embodiment:

Below in conjunction with the accompanying drawing and the specific embodiment this utility model is described in further detail:

Referring to Fig. 1 to Fig. 4, a kind of preferred embodiment that provides according to this utility model, comprise a hollow needle tubing 2, one is installed in that cross sections are the piston 3 that criss-cross core bar 1 and is installed in described core bar 1 front end in the described hollow needle tubing 2, the front end of described hollow needle tubing 2 is installed a needle stand 4, one syringe needle 6 is installed on the described needle stand 4, be formed with on the described core bar 1 and be shaped as zigzag locking tooth 7, described hollow needle tubing 2 inwalls and 1 of cross core bar are provided with locking card 5, described locking card 5 is made of with an end plate 52 that is connected biside plate 51 biside plate 51 that is parallel to each other, be formed with outward extending prong 8 on the described end plate 52, described prong 8 is the hollow triangle of one for protruding from the outer and end plate 52 of end plate 52, described prong 8 is stuck in the inwall of hollow pipe 2, biside plate 51 respectively is formed with button 9 in the sharp edge shape, described in button 9 match with locking tooth 7 on the core bar 1.

Referring to Fig. 1, a kind of preferred embodiment that provides according to this utility model, the hypotenuse of described locking tooth 7 becomes 20 ° with core bar 1 centrage angle, the friction of relative motion when described angle helps for 20 ° overcoming locking card 5 and 7 direct motions of locking tooth, guarantee the relative motion of 7 of locking card 5 and locking tooths, thereby reached the purpose of aspiration medicinal liquid.

Referring to Fig. 2, a kind of preferred embodiment that provides according to this utility model, described prong 8 becomes 30 ° with a described end plate 52 plane included angles, described angle helps overcoming the friction that locking card 5 moves ahead along hollow needle tubing 2 for 30 °, guaranteed that prong 8 thrusts the inwall of hollow needle tubing 2 exactly and in fact piston can not be retreated when retreating, reach the self-destruction effect.

Referring to Fig. 1, Fig. 5, Fig. 7 and Fig. 8 illustrate work process of the present utility model, Fig. 1 is a unused state, Fig. 5 is for using the back state, during installation the interior button 9 that is shaped on the locking card 5 is placed in the locking tooth 7 of core bar 1, described prong 8 is pressed on the inwall of hollow needle tubing 2, during aspiration medicinal liquid, core bar 1 shrinks back, and the prong 8 on the locking card 5 blocks hollow needle tubing 2, locking card 5 does not move in position, and when liquid medicine injection, locking card 5 moves ahead under the effect of locking tooth 7 and interior button 9 along core bar 1, itself and piston 3 enter the front end of hollow needle tubing 2 together, after injecting liquid drug finished, prong 8 thrust the inwall of hollow pipe 2, button 9 in locking tooth 7 blocks, core bar 1 reaches the self-destruction purpose because the effect of locking card 5 is pulled out with regard to can not move backward again.

Above-mentioned several embodiment is only for the usefulness that this utility model is described; and be not to restriction of the present utility model; the those of ordinary skill in relevant technologies field; under the situation that does not break away from spirit and scope of the present utility model; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be limited by each claim.

Claims

1, a kind of disposable self-destruction syringe, comprise a hollow needle tubing (2), one to be installed in the interior cross section of described hollow needle tubing (2) be the piston (3) that criss-cross core bar (1) and is installed in described core bar (1) front end, the front end of described hollow needle tubing (2) is installed a needle stand (4), one syringe needle (6) is installed on the described needle stand (4), it is characterized in that: be formed with locking tooth (7) on the described core bar (1), be provided with locking card (5) between described hollow needle tubing (2) inwall and cross core bar (1), described locking card (5) can be along core bar (1) and unidirectional syringe needle (6) direction that slides to of hollow pipe (2) inwall.

2, a kind of disposable self-destruction syringe according to claim 1 is characterized in that: described locking tooth (7) be shaped as zigzag.

3, a kind of disposable self-destruction syringe according to claim 1 and 2, it is characterized in that: described locking card (5) is made of with an end plate (52) that is connected biside plate (51) the biside plate that is parallel to each other (51), be formed with an outward extending prong (8) on the described end plate (52), biside plate (51) respectively is formed with button (9) in the sharp edge shape, the sensing of described prong (8) and interior button (9) is opposite with needle-like (6), described in button (9) match with locking tooth (7) on the core bar (1).

4, a kind of disposable self-destruction syringe according to claim 2 is characterized in that: the hypotenuse of described locking tooth (7) becomes 10 ° to 30 ° angles with core bar (1) centrage.

5, a kind of disposable self-destruction syringe according to claim 3 is characterized in that: described prong (8) is for protruding from outside the end plate (52) and end plate (52) is the hollow triangle of one, and described prong (8) is pressed on the inwall of hollow pipe (2).

6, a kind of disposable self-destruction syringe according to claim 5 is characterized in that: described prong (8) becomes 20 ° to 40 ° angles with described end plate (52) plane.

7, a kind of disposable self-destruction syringe according to claim 5 is characterized in that: described end plate (52) and biside plate (51) are substantially rectangle.