CN2875470Y - Improved self-destroying injector - Google Patents

Abstract

The utility model discloses a modified self-destructive syringe including a hollow needle tube, a push rod that is arranged in the needle tube and a rubber plug which is arranged on the front end of the push rod, wherein the front end of the needle tube is provided with a needle base, and the needle base is equipped with a needle head, while the front end of the push rod is provided with a card core, the push rod and the card core are in separated structure and the card core can plug the inner cavity of the needle base; the front end of the needle base is provided with a plurality of flexible shoring claws, at the head part of the card core is provided with a round groove that can combine with the flexible shoring claws, while the side edge of the card core is provided with a through slot for the smooth flow of the liquid. Compared with the prior art, the utility model has the characteristics of that the mold is simple to set, easy to process with high yield rate.

Description

A kind of self-destruction syringe of improvement

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 and the pusher structure of existing self-destruction syringe are split type, mainly comprise: a hollow needle tubing, is installed in the plug that the interior push rod and of described needle tubing is installed in described push rod front end, the front end of needle tubing forms a needle stand, one syringe needle is installed on the needle stand, and the needle stand inner chamber forms a bulge loop; Described push rod front end is provided with a core of the card, push rod and the core of the card are for dividing body structure, and the core of the card is installed in the front end of described push rod, and symmetrical molding is gone up on its surface two reversed acanthoid projectioies, this projection can snap in the cavity of described bulge loop front end, and the core of the card can stop up described needle stand inner chamber; The middle part of the core of the card forms a through hole, and the position of through hole is corresponding with described projection.After pushing away liquid and finishing, the bulge loop that the core of the card will pass the needle stand inner chamber enters in the cavity of needle stand, and at this moment projection will be stuck on the lateral surface of bulge loop, move backward thereby hinder the core of the card, the core of the card is separated with push rod, damaged at push rod firmly fractures push rod at last, destroy push rod, reach self-destruction.Though above-mentioned patent is a kind of the core of the card simple in structure and the self-destroyed syringe of push rod separate type, but there is following shortcoming in it: at first, in producing high-precision medical device, described the core of the card volume is little, complex structure, mould is difficult to offer, and processing technique is complicated thereupon, thereby has increased the cost of mould; Secondly, the residual quantity of liquid is big after injection finishes.

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 self-destruction syringe of improvement is provided, and the mould of this syringe is offered simply, and is easy to process, the yield rate height.

For achieving the above object, this utility model is by the following technical solutions:

A kind of self-destruction syringe of improvement, comprise that a hollow needle tubing, is installed in the plug that the interior push rod and of needle tubing is installed in the push rod front end, the front end of described needle tubing forms a needle stand, one syringe needle is installed on the needle stand, described push rod front end is provided with a core of the card, push rod and the core of the card are for dividing body structure, the core of the card can stop up described needle stand inner chamber, it is characterized in that: described needle stand front end forms a plurality of elasticity support claws, form a round recessed that can fasten with the elasticity support claw on the described the core of the card head, the side of the core of the card forms one can make the smooth and easy groove that passes through of liquid.

Above-mentioned needle stand head forms the elasticity support claw more than 2.

A conical boss is set up at above-mentioned the core of the card top.

The rear end of above-mentioned the core of the card forms an axial blind hole, and described blind hole matches with a cylinder that is located at the push rod front end.

A cylinder is set up at the middle part of above-mentioned the core of the card, can be interference fitted in the front end endoporus of plug.

Set up a breach in the anterior round platform of above-mentioned push rod.

Above-mentioned push rod is provided with three easy breakpoints.

The rear end of above-mentioned push rod is provided with a home block, and an end of home block and a place of push rod side link together, and the other end can embed on the push rod in the corresponding breach, makes one of the upper right quarter molding of home block can block the platform of syringe bottom.

Self-destruction syringe according to this novel a kind of improvement that provides compared with prior art has following advantage: at first, the structure of the core of the card is more simple, has simplified the manufacturing of mould, can better meet the high-precision that adds man-hour, provides cost savings.Secondly, the residual quantity of liquid still less after injection finishes.

Description of drawings

The cutaway view of Fig. 1, this utility model unused state;

The cutaway view of Fig. 2, this utility model drawing liquid state;

Fig. 3, this utility model push away the cutaway view of the preceding state of liquid;

Fig. 4, this utility model push away the finish cutaway view of state of liquid;

The cutaway view of Fig. 5, this utility model self-destruction first step;

The cutaway view that Fig. 6, this utility model self-destruction finish;

The structural representation of Fig. 7, this utility model the core of the card;

The structural representation of Fig. 8, this utility model plug;

The structural representation of Fig. 9, this utility model push rod.

The specific embodiment

Shown in Fig. 1,7,8,9, a kind of self-destruction syringe of improvement comprises that a hollow needle tubing 1, is installed in the push rod 3 in the needle tubing 1 and is installed in the plug 2 of push rod 3 front ends.The front end of needle tubing 1 forms a needle stand 11, and needle stand 11 heads form plural elasticity support claw 12.Described push rod 3 front ends have a core of the card 5, the core of the card 5 and push rod 3 are for dividing a body structure, and the core of the card 5 is installed in described push rod 3 front ends, and its head is formed with a round recessed 51 that can fasten with elasticity support claw 12, when push rod 3 inwardly pushed away liquid, the round recessed 51 of the core of the card 5 heads just entered in the elasticity support claw 12; The core of the card 5 can stop up described needle stand 11 inner chambers, here said obstruction is not the inner chamber tight seal with described needle stand 11, a plurality of grooves 52 of the side molding of described the core of the card 5, and this groove 52 is a strip groove, can make that liquid is smooth and easy to be passed through, reach the purpose of few residual quantity.

Shown in Fig. 7,8, a conical boss 56 is set up at the top of the core of the card 5 head round recesseds 51, and this structure can make conical boss 56 be easy to pass elasticity support claw 12, guarantees that simultaneously the core of the card 5 is retained in the cavity of needle stand 11, thereby better stop up needle stand 11, reach the purpose of self-destruction and few residual quantity.The rear end of the core of the card 5 is formed with an axial blind hole 53, and blind hole 53 matches with a cylinder 31 that is located at push rod 3 front ends, make the core of the card 5 can location and installation at the front end of described push rod 3.A cylinder 54 is set up at the middle part of the core of the card 5, it is supported in the endoporus of plug 2 front ends, the core of the card 5 is with after described push rod 3 separates when push rod is taken out backward, this moment, cylinder 54 parts also spun off in plug 2, because of the rearward end 55 of the core of the card 5 is planes, more than the twice of its diameter above the endoporus of described plug 2, described the core of the card 5 just can not be installed in the described plug 2 once more, thereby reaches the purpose of self-destruction.

As shown in Figure 9, push rod 3 is provided with three easy breakpoint A, B, C, when the injection rear push-rod 3 that finishes can be broken or fractures during withdrawing backward along described easy breakpoint, thereby described push rod 3 can't be reused.The preceding round platform of push rod 3 is provided with a breach 35, and air was unimpeded when plug 2 was connected with push rod 3, just can't the secondary drawing liquid behind the endoporus before the core of the card 5 leaves plug 2, play the function of self-destruction.The rear lateral portion of push rod 3 is provided with a home block 34, an one end D of home block 34 and a place of push rod 3 sides link together, the other end can embed in the breach 33 corresponding on the push rod 3, platform 341 that can block needle tubing 1 bottom of home block 34 upper right quarter molding, prevent from before transportation and drawing liquid body, to push in the elasticity support claw 12 of described needle stand 11, make syringe shift to an earlier date self-destruction because of maloperation misses described the core of the card 5.Before pushing away liquid, easily promoting described home block 34 with external force can embed in the corresponding breach 33 described home block 34 along end points D rotation.

This utility model in use, at first, as shown in Figure 1, when syringe was not used, the round recessed 51 of the core of the card 5 did not pass the elasticity support claw 12 of needle stand 11, contacted with the bottom surface of described needle tubing 1 for the platform 341 of home block 34 that prevents maloperation simultaneously.As shown in Figure 2, this process is the drawing liquid process of syringe, and push rod 3 drawing liquid backward stops, and this moment, home block 34 was not embedded in the described pit 33.Subsequently as shown in Figure 3, this process is for the warming up before pushing away liquid, this moment, described home block 34 was embedded in the described breach 33.As shown in Figure 4, this process is for pushing away the liquid process, and after pushing away liquid and finishing, the cone boss 56 of described the core of the card 5 will pass described elasticity support claw 12, and elasticity support claw 12 and round recessed 51 are fastened, and moves backward thereby hinder the core of the card 5.As shown in Figure 5, this process is that the core of the card 5 and push rod 3 are separated, and the core of the card 5 stops up the inner chamber of needle stand 11, can not reuse, and finishes the self-destruction first step.As shown in Figure 6, this process is second step of self-destruction, and push rod 3 is pulled to described easy breakpoint A, B, C, firmly push rod 3 is broken or is fractureed, and makes the head of push rod 3, breaks and can't come out in syringe, prevents that the bad person from changing push rod and plug reuses, and reaches self-destruction.

The core of the card structure of the present utility model is more simple, has simplified the manufacturing of mould, can better meet the high-precision that adds man-hour, provide cost savings, and when the injection finish after liquid residual quantity also still less.

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 of the spirit and scope that do not break away from 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 (8)

1, a kind of self-destruction syringe of improvement, comprise that a hollow needle tubing, is installed in the plug that the interior push rod and of needle tubing is installed in the push rod front end, the front end of described needle tubing forms a needle stand, one syringe needle is installed on the needle stand, described push rod front end is provided with a core of the card, push rod and the core of the card are for dividing body structure, the core of the card can stop up described needle stand inner chamber, it is characterized in that: described needle stand front end forms a plurality of elasticity support claws, form a round recessed that can fasten with the elasticity support claw on the described the core of the card head, the side of the core of the card forms one can make the smooth and easy groove that passes through of liquid.

2, as the self-destruction syringe of a kind of improvement of claim 1, it is characterized in that: described needle stand head forms the elasticity support claw more than 2.

3, as the self-destruction syringe of a kind of improvement of claim 1, it is characterized in that: a conical boss is set up at described the core of the card top.

4, as the self-destruction syringe of a kind of improvement of claim 1 or 3, it is characterized in that: the rear end of described the core of the card forms an axial blind hole, and it matches with a cylinder that is located at the push rod front end.

5, as the self-destruction syringe of a kind of improvement of claim 1 or 3, it is characterized in that: a cylinder is set up at the middle part of described the core of the card, can be interference fitted in the front end endoporus of plug.

6, as the self-destruction syringe of a kind of improvement of claim 1, it is characterized in that: set up a breach in the anterior round platform of described push rod.

7, as the self-destruction syringe of a kind of improvement of claim 1, it is characterized in that: described push rod is provided with three easy breakpoints.

8, as the self-destruction syringe of a kind of improvement of claim 1, it is characterized in that: the rear end of described push rod is provided with a home block, one end of home block and a place of push rod side link together, the other end can embed on the push rod in the corresponding breach, makes one of the upper right quarter molding of home block can block the platform of syringe bottom.

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