CN2880125Y

CN2880125Y - Self-distruction type injuctor

Info

Publication number: CN2880125Y
Application number: CN 200620100331
Authority: CN
Inventors: 林作钱
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-12
Filing date: 2006-01-12
Publication date: 2007-03-21
Anticipated expiration: 2016-01-12

Abstract

The utility model relates to a self-destruction syringe, comprising a hollow injection cylinder, a pusher sliding within the syringe and a rubber stopper installed in the front of the pusher. The front end of the syringe is shaped to form a hub which is connected with needle hander comprising the injection needle. On the front end of the pusher is a blocking stick which can block the inner cavity of the needle hander. The utility model is characterized in that: The above stated hub head is formed to comprise a elastic claw, the stated blocking stick is integrated with the pusher, and the head of the blocking stick is formed to comprise a recess which corresponding to the elastic claw. The side of the blocking stick is formed to comprise a communicating groove which facilitates smooth flowing of solution. The syringe of the structure has the advantages of that the structure of the blocking stick is simpler on one hand, thus simplifying the construction of tooting so as to better satisfy higher precision at processing and to save cost, and on the other hand, the residual volume of drug solution following injection is less.

Description

A kind of self-destruction syringe

Technical field

This utility model belongs to a kind of medical apparatus, belongs to a kind of disposable self-destruction syringe particularly.

Background technology

Syringe is that an indispensable apparatus is gone up in medical treatment, for avoiding the blood cross infection, present syringe all adopts disposable product, but this disposable syringe, if inartificial damages, can reuse, cause cross infection in order not make existing disposable syringe be repeated to utilize, spread disease, have many re-use preventing once-used syringes just to arise at the historic moment.For example a kind of the core of the card and pusher structure are split type self-destruction syringe, 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.There is following shortcoming in above-mentioned patent: at first, in producing high-precision medical device, described the core of the card volume is little, and complex structure, mould are difficult to offer; And the core of the card separates with push rod, and processing technique is complicated thereupon, thereby has increased the cost of mould, and secondly, the residual quantity of liquid is big after injection finishes.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of the core of the card and push rod injection moulding all-in-one-piece self-destruction syringe are provided.The characteristics of this syringe: the structure of the core of the card is more reasonable, and mould is offered simply, assembles more convenient.

In order to solve the problems of the technologies described above, this utility model is by the following technical solutions: a kind of self-destruction syringe, comprise the push rod that a hollow barrel, is slided and be installed in the plug of push rod front end in syringe, the front end of syringe forms a needle stand, needle stand is connected with the needle holder that entry needle is housed, the push rod front end is provided with a core of the card, and the core of the card can stop up described needle stand inner chamber, and it is characterized in that: described needle stand head forms the elasticity support claw; Described the core of the card and push rod are injection molded into one; Form a groove 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.

Adopt the syringe of this structure, the structure of the core of the card is more simple on the one hand, has simplified the manufacturing of mould, can better meet the high-precision that adds man-hour, provides cost savings, and on the other hand, the residual quantity of medicinal liquid still less after having injected.

In order to solve the problems of the technologies described above, this utility model adopts following further technical scheme: described push rod is provided with some easy breakpoints.After being provided with easy breakpoint, after having injected, push rod is backward during withdrawing, can break or fractures along described easy breakpoint, reaches the purpose of thorough self-destruction.

In order to solve the problems of the technologies described above, this utility model also adopts following further technical scheme: the bottom of described push rod is provided with thrust block, correspondingly the push rod bottom is provided with the through hole that this thrust block is installed, thrust block and through-hole wall are connected as a single entity with two easy breakpoints and an end points and push rod, thrust block rotates along end points, and upper wall molding one is used for the circular arc shallow slot that the thrust block lateral wall embeds in the through hole.

Described thrust block is T font or yi word pattern or round or square or camber or polygonal.

After this thrust block is installed, can prevent from before transportation and drawing liquid body, to shift to an earlier date self-destruction because of maloperation makes syringe.

Description of drawings

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

Fig. 2, push away the cutaway view of state before the liquid for this utility model;

Fig. 3, finish for this utility model pushes away liquid, the cutaway view of the self-destruction first step;

Fig. 4, the cutaway view that finishes for this utility model self-destruction;

Fig. 5, be the structural representation of this utility model push rod;

Fig. 6, be that the K of Fig. 5 is to view;

Fig. 7, be that the A-A of Fig. 5 is to cutaway view;

Fig. 8, be that the B-B of Fig. 5 is to cutaway view.

The specific embodiment

With reference to each accompanying drawing, this utility model comprises a hollow barrel 1, one push rod that in syringe 1, slides 2 and the plug 3 that is installed in push rod 2 front ends, the front end of syringe 1 forms a needle stand 4, needle stand 4 is connected with the needle holder 6 that entry needle 5 is housed, here, needle stand 4 can adopt the thread head structure, also can adopt the center head structure, consider that the static friction that only relies between needle holder 6 and the needle stand 4 between the two realizes connecting, in use might come off,, preferably adopt the thread head structure for avoiding the generation of this phenomenon, make the flange and needle stand 4 screw-threaded engagement of needle holder 6 bottoms, reach the purpose that is connected with this.Needle stand 4 heads form elasticity support claw 8, and elasticity support claw 8 is at least two, and described push rod 2 front ends have a core of the card 7, and the core of the card 7 is injection molded into one with push rod 2; Its head is formed with a groove 9 that can fasten with elasticity support claw 8, when push rod 2 inwardly pushes away liquid, the core of the card 7 just enters in the elasticity support claw 8, last elasticity support claw 8 falls in the groove 9 of the core of the card 7, with the core of the card 7 lockings, the core of the card 7 can stop up described needle stand 4 inner chambers, finish the self-destruction first step, here said obstruction is not the inner chamber tight seal with described needle stand 4, the side of described the core of the card 7 is provided with groove 10, the groove 10 of present embodiment is a strip groove, can make that liquid is smooth and easy to be passed through, and has reached the purpose of few residual quantity.

A conical boss 11 is set up at the top of the core of the card 7, and this structure can make conical boss 11 be easy to pass elasticity support claw 8, guarantees that simultaneously the core of the card 7 is retained in the cavity of needle stand 4, thereby better stops up needle stand 4, reaches the purpose of self-destruction and few residual quantity.

Push rod 2 is provided with some easy breakpoints, and present embodiment is provided with three easy breakpoint A, B, C, when injection finishes rear push-rod 2 backward during withdrawing, can break along described easy breakpoint, thereby described push rod 2 can't be reused, and reaches the purpose of thorough self-destruction.

The bottom of push rod 2 is provided with behind the thrust block 12, correspondingly push rod 2 bottoms are provided with the through hole 13 that this thrust block 12 is installed, thrust block 12 is connected as a single entity with push rod 2 with two easy breakpoints 14 and an end points 15 with through hole 13 inwalls, thrust block 12 rotates along end points 15, and upper wall molding one is used for the circular arc shallow slot 16 that thrust block 12 lateral walls embed in the through hole 13.Described thrust block 12 can be T font, yi word pattern, round, square, camber, polygonal or other shape, adopt the T font in the present embodiment, this thrust block 12 can prop up syringe 1 bottom, prevent from before transportation and drawing liquid body, to push in the elasticity support claw 8 of described needle stand 4, make syringe shift to an earlier date self-destruction because of maloperation misses described the core of the card 7.Before pushing away liquid, easily promote described thrust block 12 with external force, thrust block 12 can be rotated along end points 15, the easy breakpoint on top is disconnected, the lateral wall of described thrust block 12 embeds circular arc shallow slot 16.

This utility model in use, at first, as shown in Figure 1, when syringe was not used, the core of the card 7 did not pass the elasticity support claw 8 of needle stand 4, simultaneously for to prevent that the thrust block 12 of maloperation from propping up syringe 1 bottom.

Subsequently as shown in Figure 2, this process is for the warming up before pushing away liquid, this moment, the lateral wall of thrust block 12 was embedded into circular arc shallow slot 16.As shown in Figure 3, this process is for pushing away the liquid process, and after pushing away liquid and finishing, the cone boss 11 of described the core of the card 7 will pass described elasticity support claw 8, and elasticity support claw 8 and groove 9 are fastened, and moves backward thereby hinder the core of the card 7.The core of the card 7 stops up the inner chamber of needle stand 4, can not reuse, and finishes the self-destruction first step.As shown in Figure 4, this process is second step of self-destruction, firmly push rod 2 is broken, and makes the head of push rod 2, breaks and can't come out in syringe 1, prevents to change push rod 2 and plug 3 reuses, and reaches thorough self-destruction.

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

1, a kind of self-destruction syringe, comprise the push rod (2) that a hollow barrel (1), is slided and be installed in the plug (3) of push rod (2) front end in syringe (1), the front end of syringe (1) forms a needle stand (4), needle stand (4) is connected with the needle holder that entry needle (5) are housed (6), push rod (2) front end is provided with a core of the card (7), the core of the card (7) can stop up described needle stand (4) inner chamber, it is characterized in that:

A: described needle stand (4) head forms elasticity support claw (8);

B: described the core of the card (7) is injection molded into one with push rod (2);

C: form a groove (9) that can fasten with elasticity support claw (8) on described the core of the card (7) head, the side of the core of the card (7) forms one can make the smooth and easy groove that passes through of liquid (10).

2, a kind of self-destruction syringe as claimed in claim 1 is characterized in that: described push rod (2) is provided with some easy breakpoints.

3, a kind of self-destruction syringe as claimed in claim 1 is characterized in that: described needle stand (4) adopts thread head or center head.

4, a kind of self-destruction syringe as claimed in claim 1 is characterized in that: elasticity support claw (8) number of described needle stand (4) head is at least two.

5, a kind of self-destruction syringe as claimed in claim 1 is characterized in that: described the core of the card (7) top is provided with a conical boss (11).

6, as each described a kind of self-destruction syringe of claim 1 to 5, it is characterized in that: the bottom of described push rod (2) is provided with thrust block (12), correspondingly push rod (2) bottom is provided with the through hole (13) that this thrust block (12) is installed, thrust block (12) is connected as a single entity with push rod (2) with two easy breakpoints (14) and an end points (15) with through hole (13) inwall, thrust block (12) rotates along end points (15), and the interior upper wall molding one of through hole (13) is used for the circular arc shallow slot (16) that thrust block (12) lateral wall embeds.

7, a kind of self-destruction syringe as claimed in claim 6 is characterized in that: described thrust block (12) is T font or yi word pattern or round or square or camber or polygonal.