CN2640496Y

CN2640496Y - Improved self-destroying syringe

Info

Publication number: CN2640496Y
Application number: CN 03266827
Authority: CN
Inventors: 应相云; 叶明华
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-07
Filing date: 2003-07-07
Publication date: 2004-09-15
Anticipated expiration: 2013-07-07

Abstract

The utility model relates to an improved self-destruction injector, which comprises a needle tube, a piston and a core rod. The front end of the needle tube forms a conical seat; a block core is arranged at the front end of the piston; the block core can cooperate with a block connecting system in the inner cavity of the conical seat to block the inner cavity of the conical seat. The block core and the core rod of the utility model are made into a fission structure, thereby simplifying the mould design, better meeting the high precision required by processing injectors; moreover, due to the fission structure, the block core and the core rod can be separated by small force; the cooperating face and the cooperating intensity of the block core and the block connecting system can be reduced; therefore the block core can cooperate with the block connecting system with small force, reducing pain of patients caused by sudden exertion at the end of a perfusion; besides, the defective part arranged at the core rod can break the core rod, thus making the utility model not suitable for reuse with a damaged core rod.

Description

A kind of improved self-destruction syringe

Technical field

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

Background technology

The core of the card of most self-destruction syringe and core bar are as one in the prior art, it as the patent No. 99226715.3 Chinese utility model patent, a kind of injection needles device is disclosed, comprise cylindrical shell, tube core and entry needle are formed, there is breast protruding on the piston of tube core push rod, it is described the core of the card, breast is protruding to be connected with breast plug pipeline and crack groove with piston, the interior back-off of protruding outer back-off of breast and needle nipple cooperatively interacts and self-locking, the interior remaining needle of cylindrical shell is put on breast is protruding and is lain in the needle nipple inner chamber, pushing remaining needle has the back-off inner chamber of falling the needle nipple to be provided with the back-off fixedly entry needle that cooperatively interacts, inject the interior fast and convenient aspiration medicinal liquid of bottle with the external injection bottle that links to each other and enter application state, after injection was finished, distortion power made newborn protruding dialysis stop up the needle nipple inner chamber, and piston has leak to form and self-destruction.Though above-mentioned patent is a kind of disposable self-destruction syringe simple in structure, but there is following shortcoming in it: at first, in the high-precision medical device of production requirement, with described the core of the card (above-mentioned patent alleged newborn protruding) and core bar (the tube core that above-mentioned patent is alleged) as one, mould is very difficult to offer, and processing technique is complicated thereupon; Secondly, the yield rate of processing is lower, has influenced the promotion and application of this series products; Once more, owing to be integrative-structure, needing bigger power could break it, therefore the mating surface of back-off mechanism is very big, when syringe uses when last, need apply a bigger power could push the core of the card in the back-off mechanism, can cause great misery to patient like this.

The utility model content

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and a kind of improved self-destruction syringe is provided, and the mould of this syringe is offered simply, and is easy to process, the yield rate height.

A kind of improved self-destruction syringe that provides according to this utility model, comprise that a needle tubing, is installed in the core bar that the interior piston, of described needle tubing can promote described piston axially-movable, the front end of described needle tubing is formed with an awl seat, described piston nose is equipped with a core of the card, described the core of the card can match with the clamping mechanism in the inner chamber of described awl seat, and the inner chamber of described awl seat is stopped up.

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

Described clamping mechanism is one to be formed in a bulge loop of described awl seat inner chamber, is formed with a circle or an a plurality of double wedge on the described the core of the card, and described double wedge can snap in the cavity of described bulge loop front end.

The front end of described the core of the card is provided with a tapering, and its rear end is formed with an axial blind hole, and described blind hole matches with a cylinder that is located at described piston nose.

Described double wedge forms in the middle part of described the core of the card, and described double wedge is an agnail structure.

Described core bar is provided with a damaged portion, and described core bar can fracture along described damaged portion.

The rearward end of described needle tubing is provided with a home block, and an end and the described needle tubing of described home block link together, the other end snap in described core bar on a breach in.

A kind of improved self-destruction syringe that provides according to this utility model compared with prior art has following advantage: at first, because the core of the card and core bar are made the branch body structure, simplify Mould design, can better meet the desired high-precision of processing syringe; Secondly, owing to divide body structure, the core of the card only needs smaller power just can separate with core bar, the core of the card can reduce with the mating surface of clamping mechanism and the intensity that cooperates, thereby the core of the card only needs can to match with described clamping mechanism with smaller power, and it is last because of the unexpected misery that firmly causes in injection to have reduced patient; Once more,, described core bar can be fractureed, allow described core bar damage, and can't reuse owing on core bar, be provided with damaged portion.

Description of drawings

Fig. 1 is the cutaway view of the unused state of a kind of preferred embodiment of providing according to this utility model.

Fig. 2 is the cutaway view of the drawing liquid state of a kind of preferred embodiment of providing according to this utility model.

Fig. 3 is the cutaway view that pushes away liquid status of a kind of preferred embodiment of providing according to this utility model.

Fig. 4 is the cutaway view of the self-destruction first step of a kind of preferred embodiment of providing according to this utility model.

Fig. 5 is the cutaway view that the self-destruction of a kind of preferred embodiment of providing according to this utility model finishes.

Fig. 6 is the amplification view of the core of the card among Fig. 1 to Fig. 5.

Fig. 7 is the front view of the core bar among Fig. 1 to Fig. 5.

Fig. 8 is the enlarged drawing at A place among Fig. 3.

The specific embodiment:

Referring to Fig. 1 to Fig. 8, the preferred embodiment of a kind of improved self-destruction syringe that provides according to this utility model, comprise that a needle tubing 1, is installed in the core bar 3 that described needle tubing 1 interior piston 2, can promote described piston 2 axially-movables, the front end of described needle tubing 1 is formed with an awl seat 11, in use, on the described awl seat 11 syringe needle can be installed.Described piston 2 front ends are equipped with a core of the card 5, and described the core of the card 5 can match with the clamping mechanism in the inner chamber of described awl seat 11, and the inner chamber of described awl seat 11 is stopped up.

Referring to Fig. 8, in the preferred embodiment that provides, described clamping mechanism is one to be formed in a bulge loop 13 of described awl seat 11 inner chambers, is formed with a circle or an a plurality of double wedge 51 on the described the core of the card 5, and described double wedge 51 can snap in the cavity of described bulge loop 13 front ends.It is less that described bulge loop 13 can be done, and so only needs a less power just can make described the core of the card 5 pass bulge loop 13, snaps in the front end cavity of described bulge loop 13, and described double wedge 51 just can be stuck on the lateral surface of described bulge loop 13.

Referring to Fig. 6, in the preferred embodiment that provides, the front end of described the core of the card 5 is provided with a tapering 52, and its rear end is formed with an axial blind hole 53, and described blind hole 53 matches with a cylinder 31 that is located at described piston 2 front ends.

Referring to Fig. 7, in the preferred embodiment that provides, described double wedge 51 forms in the middle part of described the core of the card 5, and described double wedge 51 is an agnail structure.This structure can make described double wedge 51 be easy to pass described bulge loop 13, in the cavity that guarantees simultaneously to have most described the core of the card 5 to be retained in described awl seat 11.

Referring to Fig. 1 to Fig. 5, in the preferred embodiment that provides, described core bar 3 is provided with one damaged 32, described core bar 3 can fracture along described damaged 32, after syringe uses, described core bar 3 is fractureed from described damaged 32, thereby described core bar 3 can't be reused.

Referring to Fig. 1, in the preferred embodiment that provides, the rearward end of described needle tubing 1 is provided with a home block 14, and an end and the described needle tubing 1 of described home block 14 link together, the other end snap in described core bar 3 on a breach 33 in.The side that described breach 33 matches with the lateral surface of described home block 14 is a vertical, the side of the described breach 33 that matches with the medial surface of described home block 14 is an inclined plane, thereby guarantee that described core bar 3 pulls out earlier in described needle tubing 1, could advance again, be that syringe is finished drawing liquid earlier, could finish again and push away liquid.Simultaneously, when syringe was not used, described home block 14 can prevent because of maloperation, and described the core of the card 5 mistakes are pushed in the cavity of described awl seat 11, and when syringe used, described home block 14 was destroyed, and this described home block 14 can not be repaired.

Referring to Fig. 1 to 5, self-destruction process of the present utility model is described, at first, referring to Fig. 1, when syringe was not used, described the core of the card 5 did not enter in the cavity of described awl seat 11, prevents that the described home block 14 of maloperation is intact; Referring to Fig. 2, this process is the drawing liquid process of syringe, and described core bar 3 is pulled out backward, and this moment, described home block 14 was extruded in described breach 33, and described home block 14 is destroyed, and medicinal liquid enters in the described needle tubing 1 simultaneously, carries out the preparation that pushes away liquid; Referring to Fig. 3, this process is for pushing away the liquid process, after pushing away liquid and finishing, described the core of the card 5 will pass described bulge loop 13, enter in the cavity of described awl seat 11, described double wedge 51 by described bulge loop 13, enters in the cavity of described bulge loop 13 front ends under squeezed state, described double wedge 51 recovers original open configuration under self tensile effect after entering cavity; Referring to Fig. 4 and Fig. 8, this process is the first step of self-destruction, described core bar 3 is pulled outwardly, opened owing to described double wedge 51 this moment, described double wedge 51 will be stuck on the lateral surface of described bulge loop 13, moves backward thereby hinder described the core of the card 5, and described the core of the card 5 is separated with described core bar 3, described the core of the card 5 stops up the inner chamber of described awl seat 11, can not reuse; Referring to Fig. 5, this process is second step of self-destruction, and described core bar 3 is pulled to described damaged 32, firmly described core bar 3 is fractureed, and destroys described core bar 3, prevents reusing of described core bar 3.

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 improved self-destruction syringe, comprise that a needle tubing (1), is installed in the core bar (3) that the interior piston (2), of described needle tubing (1) can promote described piston (2) axially-movable, the front end of described needle tubing (1) is formed with an awl seat (11), it is characterized in that: described piston (2) front end is equipped with a core of the card (5), described the core of the card (5) can match with the clamping mechanism in the inner chamber of described awl seat (11), and the inner chamber of described awl seat (11) is stopped up.

2, a kind of improved self-destruction syringe as claimed in claim 1, it is characterized in that: described clamping mechanism is one to be formed in a bulge loop (13) of described awl seat (11) inner chamber, be formed with a circle or an a plurality of double wedge (51) on the described the core of the card (5), described double wedge (51) can snap in the cavity of described bulge loop (13) front end.

3, a kind of improved self-destruction syringe as claimed in claim 2 is characterized in that; The front end of described the core of the card (5) is provided with a tapering (52), and its rear end is formed with an axial blind hole (53), and described blind hole (53) matches with a cylinder (31) that is located at described piston (2) front end.

4, a kind of improved self-destruction syringe as claimed in claim 3 is characterized in that; Described double wedge (51) forms in the middle part of described the core of the card (5), and described double wedge (51) is an agnail structure.

5, as claim 1 or 2 or 3 described a kind of improved self-destruction syringes, it is characterized in that: described core bar (3) is provided with one damaged (32), and described core bar (3) can fracture along described damaged (32).

6, as claim 1 or 2 or 3 described a kind of improved self-destruction syringes, it is characterized in that: the rearward end of described needle tubing (1) is provided with a home block (14), one end of described home block (14) and described needle tubing (1) link together, the other end snap in described core bar (3) on a breach (33) in.