CN200973892Y

CN200973892Y - Self-destroyed type injector push rod

Info

Publication number: CN200973892Y
Application number: CN 200620139943
Authority: CN
Inventors: 林作钱
Original assignee: 林作钱
Current assignee: Shanghai Sol-Millennium Medical Products Co., Ltd.
Priority date: 2006-11-10
Filing date: 2006-11-10
Publication date: 2007-11-14
Anticipated expiration: 2016-11-10

Abstract

The utility model relates to a self-destroying injector handspike, which comprises a handspike body. The handspike body is provided with a plurality of easy-breaking points. The utility model is characterized in that: the easy-breaking points are arranged on the same plane in symmetry and parallel. The clearance between the bottom plane of a boss and the top end of a concave supporting bracket is equal to that between the top end of a convex supporting bracket and the bottom end of the concave supporting bracket, and the clearance is ranging from 0.2mm to 0.5mm. With the technical project, all easy-breaking points are under the even pressure, and each point is within the distortion scope of 0.2mm to 0.5mm. The bottom plane of the boss contacts the top end of the concave supporting bracket, and the top end of the convex supporting bracket contacts the bottom end of the concave supporting bracket. Easy-breaking points do not rupture, which can avoid the case that the needle is retained outside the needle cylinder when being drawn back, thus achieving the purpose of self-destroying.

Description

A kind of self-destruction syringe push rod

Technical field

This utility model belongs to a kind of medical apparatus, belongs to a kind of push rod of 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 damaging, 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, wherein often adopt and inject the broken syringe of rear push-rod that finishes, to reach self-destruction.As three easy breakpoints are set on push rod, but three easy-to-draw some discontinuity of the push rod of this structure, easy extrusion fracture, when especially being used in needle retractable type syringe, do not stayed outside the syringe because of easy-to-draw some fracture syringe needle retracts together when push rod is pulled back, do not reach the safety self-destruct effect of expection.

Summary of the invention

Technical problem to be solved in the utility model is: provide a kind of rational in infrastructure, be fit to the self-destruction syringe push rod that needle retractable type syringe uses.

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 push rod, comprise the push rod main body, described push rod main body is provided with several easy breakpoints, it is characterized in that: these easily broken point symmetries and be arrangeding in parallel at grade.

In order to solve the problems of the technologies described above, this utility model adopts following further technical scheme: the baseplane of described boss equates that with the gap of recessed bracing frame bottom its gap is in 0.2 to 0.5MM scope with vertical gap of recessed bracing frame and protruding bracing frame top.

Make each easy breakpoint stressed evenly after adopting technique scheme, distortion simultaneously, each easy breakpoint is in 0.2 to 0.5MM deformation range, boss baseplane and recessed bracing frame top, protruding bracing frame top and plane, recessed bracing frame bottom and end face are collided, each easy breakpoint can not rupture, can not cause when pulling back and do not stayed the outer situation of syringe, reach the purpose of thorough self-destruction because of easy-to-draw some fracture syringe needle retracts together.

In order to solve the problems of the technologies described above, this utility model adopts following further technical scheme: the bottom of described push rod main body is provided with thrust block, correspondingly the push rod lower body part 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 main body, and thrust block rotates along end points.

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.

In order to solve the problems of the technologies described above, this utility model also adopts following further technical scheme: described thrust block is provided with claw, forms when being used for thrust block and embedding on the described through-hole wall and boss that claw fastens.

After adopting this structure, claw on the thrust block and the boss on the through-hole wall fasten, thereby thrust block is fixed in the through hole, guarantee that injection process is smooth and easy.

Description of drawings

Fig. 1, be structural representation of the present utility model;

Fig. 2, be that the K of Fig. 1 is to view;

Fig. 3, be the partial enlarged drawing of Fig. 1;

Fig. 4, be that the A-A of Fig. 3 is to cutaway view;

Fig. 5, be the structural representation of thrust brake;

Fig. 6, be that the B-B of Fig. 5 is to cutaway view;

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

Fig. 8, the sketch map that finishes for this utility model self-destruction.

The specific embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, a kind of self-destruction syringe push rod, comprise push rod main body 1, be used to install the boss 2 of plug, the core of the card 3 that fastens with needle holder, push rod main body 1 front end forms recessed bracing frame 4, boss 2 compacted unders have the protruding bracing frame 5 that matches with

recessed bracing frame

4,5 of recessed bracing frame 4 and protruding bracing frames are provided with several easy breakpoints 6, injection finishes rear push-rod backward during withdrawing, can break along described easy breakpoint, thereby described push rod can't be reused, this utility model improvements are: these easy breakpoints 6 are symmetries and be arranged in parallel at grade, as shown in Figure 3, the quantity that easy breakpoint 6 is set in this example is 4, and the baseplane 7 of boss 2 equates that with the gap of recessed bracing frame 4 bottoms 10 its gap is in 0.2 to 0.5MM scope with the gap and protruding bracing frame 5 tops 9 on recessed bracing frame 4 tops 8.

The bottom of described push rod main body 1 is provided with thrust brake, and it is made of the through hole 12 of thrust block 11 and this thrust block 11 of installation, and thrust block 11 is connected as a single entity with push rod main body 1 with two easy breakpoints 13 and an end points 14 with through hole 12 inwalls, and thrust block 11 rotates along end points 14.This thrust block 11 can prop up the syringe bottom, prevents to shift to an earlier date self-destruction because of maloperation makes syringe before transportation and drawing liquid body.Before pushing away liquid, easily promote described thrust block 11 with external force, thrust block 11 can be rotated along end points 14, the easy breakpoint 13 on top is disconnected, the lateral wall of described thrust block 11 embeds in the through hole 12, and can easily advance push rod this moment.

In order to make the thrust block 11 that embeds in the through hole 12 can not skid off, thrust block 11 is provided with claw 15, form when being used for thrust block 11 and embedding on described through hole 12 inwalls and boss 16 that claw 15 fastens, when the lateral wall of thrust block 11 embeds through hole 12, claw 15 on the thrust block 11 fastens with the boss 16 on through hole 12 inwalls, thereby thrust block 11 is fixed in the through hole 12, guarantees that injection process is smooth and easy.

After injection finished, pull push rod back when inconsistent, was firmly broken push rod with syringe end step when boss 2 bottoms, makes the head of push rod, breaks and can't come out in syringe, prevented to change push rod and plug reuses, and reached thorough self-destruction.

The foregoing description 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 push rod, the core of the card (3) that comprises push rod main body (1), is used to install the boss (2) of plug, fastens with needle holder, push rod main body (1) front end forms recessed bracing frame (4), boss (2) compacted under has the protruding bracing frame (5) that matches with recessed bracing frame (4), be provided with several easy breakpoints (6) between recessed bracing frame (4) and protruding bracing frame (5), it is characterized in that: these easy breakpoints (6) symmetry and be arrangeding in parallel at grade.

2, a kind of self-destruction syringe push rod as claimed in claim 1, it is characterized in that: the baseplane (7) of described boss (2) equates that with the gap of recessed bracing frame (4) bottom (10) its gap is in 0.2 to 0.5MM scope with the gap on recessed bracing frame (4) top (8) and protruding bracing frame (5) top (9).

3, a kind of self-destruction syringe push rod as claimed in claim 1 or 2, it is characterized in that: the quantity of described easy breakpoint (6) is 4.

4, a kind of self-destruction syringe push rod as claimed in claim 1 or 2, it is characterized in that: the bottom of described push rod main body (1) is provided with thrust block (11), correspondingly push rod main body (1) bottom is provided with the through hole (12) that this thrust block (11) is installed, thrust block (11) is connected as a single entity with push rod main body (1) with two easy breakpoints (13) and an end points (14) with through hole (12) inwall, and thrust block (11) rotates along end points (14).

5, a kind of self-destruction syringe push rod as claimed in claim 4, it is characterized in that: described thrust block (11) is provided with claw (15), forms when being used for thrust block (11) and embedding on described through hole (12) inwall and boss (16) that claw (15) fastens.