CN2782119Y

CN2782119Y - Safety self-destroying disposable syringe

Info

Publication number: CN2782119Y
Application number: CN 200520068571
Authority: CN
Inventors: 林作钱
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-25
Filing date: 2005-01-25
Publication date: 2006-05-24
Anticipated expiration: 2015-01-25

Abstract

The utility model discloses a safety self-destroying disposable syringe which comprises a hollow needle cylinder, a push rod arranged in the needle cylinder and a rubber plug arranged on the front end of the push rod, wherein the front end of the needle cylinder is provided with a needle seat which comprises a conical seat and a support ring, a plurality of O-shaped rubber rings are arranged between an outer circle of a conical seat body and the needle cylinder, the lower part of the outer side of the conical seat is provided with a plurality of elastic position clamping blocks, the needle cylinder which corresponds to the position clamping blocks is provided with a spacing groove, the lower middle part of the conical seat is provided with a circle of groove, the support ring is arranged in the groove at the lower middle part of the conic seat; the front end of the push rod is provided with a conical bulge, the middle part of the conical bulge is provided with a pull hook and the middle part of the push rod is provided with three points which are easily pulled apart. The utility model is a self-destroying safety syringe of which the needle head is retracted in the needle cylinder after the needle head is used for injection, and injection needles with various standards can be interchanged. The syringe has the advantages of simple structure, convenient machining and use and high safety.

Description

The disposable syringe of a kind of safety self-destructing

Technical field

This utility model relates to a kind of syringe, relates in particular to the disposable syringe of a kind of safety self-destructing (hereinafter to be referred as " safety injector ").

Background technology

Facts have proved of modern medicine, for avoiding to the input of the mankind or animal or cross infection takes place when taking out medium, hypodermic syringe must disposable use, is using later promptly as garbage disposal.Using at present maximum disposable syringes is one by the cavity syringe, syringe needle and the journey piston of deciding that is fitted in the syringe are formed, the existing greatest problem of this syringe is after injection finishes, its syringe needle still is trapped in the outside, sharp-pointed degree with respect to syringe needle, it not only is the carrying of syringe rubbish, destroying makes troubles, often take place because of the thing of stabbing the medical and nursing work personnel accidentally simultaneously, this the secondary cross infection of pathogenic bacteria just inevitably can occur, particularly be used to suffer from serious infectious disease (as acquired immune deficiency syndrome (AIDS) for those, hepatitis, SARS etc.) syringe of patient's use, the medical hidden danger that can not ignore especially.Practice shows, the damage that the needle stick injuries that dangerous needle set causes obviously causes more than other accidents.

In recent years, along with it is found that disposable syringe do not had good people reclaim use repeatedly after, in having proposed self-destruction syringe at the end of last century, self-destruction syringe can destroy voluntarily after it uses or be locked and can not reuse.But these syringes all have an important disadvantages, and that specification that is exactly needle stand and syringe is one to one, can not satisfy different patients' needs by replacing needle stand, thereby make injection manipulation complicate, and make troubles for medical worker's use.

The utility model content

The purpose of this utility model be to provide a kind of inject use in the syringe needle of back be reduced in the syringe, the self-destroy safety injector of interchangeable various standard injection pins, this syringe simple in structure, processing and easy to use, safe.

For achieving the above object, this utility model has adopted following technical scheme:

A kind of safety injector comprises that a hollow barrel, is installed in the plug that the interior push rod and of described syringe is installed in described push rod front end, and the front end of described syringe is equipped with a needle stand, it is characterized in that: needle stand comprises awl seat and bracing ring; The awl seat is provided with Rule circular cone, and a plurality of " O " type cushion rubber is installed between awl seat body cylindrical and the syringe; An awl seat outer lower portion is set up a plurality of elasticity screens pieces, with the syringe of screens piece corresponding section on be provided with stopper slot, its size and screens piece match; Awl seat middle part is down set up a circle groove, the degree of depth of groove greater than bracing ring top cooperate section to add to promote stroke apart from sum; Awl seat bottom, medial wall is provided with a plurality of elasticity support claws; Bracing ring is built up in the groove at middle part under the awl seat, and its inside and outside circle matches with groove diameter; Bracing ring and push rod front boss be butt mutually, and its length is greater than the screens piece distance that breaks away from the awl seat; The outer top of bracing ring is provided with a cylinder, can cooperate with the elasticity screens piece of awl seat; Damaged circle is set up in the outer bottom of bracing ring, the stroke dimension when defect size is rebounded above the elasticity screens piece on the awl seat; Described push rod front end has a tapered projection, and a pull hook is set up at the middle part of tapered projection; The push rod middle part is provided with three easy-to-draw breakpoints.

The tapering of above-mentioned Rule circular cone is 6: 100;

Above-mentioned awl seat elasticity screens piece can open and shrink; When opening and syringe screens groove engagement, will bore seat and fixedly secure on syringe, break away from engagement with syringe screens groove during contraction, make an awl disengaging syringe;

The cross sectional shape of the engaging piece of above-mentioned awl seat elasticity screens piece and screens groove is square, trapezoidal, circular, ellipse and polygon etc.;

Bracing ring in the above-mentioned awl seat can only move between the room of the corresponding groove of screens piece on the awl seat; The bracing ring lower inside is set up hypotenuse, when moving to terminal point, can closely cooperate with the elasticity support claw back on the awl seat;

Three easy breakpoints at above-mentioned push rod middle part are not in same plane;

The rear end of above-mentioned push rod is provided with safe catch, and safe catch contacts with the rear wall of described syringe, and the junction of itself and push rod is provided with the easy breakpoint in many places.

A kind of safety injector that provides according to this utility model is compared with the existing market product has following advantage: at first, on the awl seat, set up symmetric elasticity screens piece, guarantee that under the effect of the elasticity activity screens piece of the stopper slot of syringe and awl seat the awl seat can not pull out and bounce back, about can not rotate yet, Rule conehead on the awl seat can cooperate with the standard injection pin of all size.Set up an O type O-ring seal between syringe and awl seat, guaranteeing not can leakage, and when injection finished the withdrawing push rod, the awl seat just was dragged in the syringe easily, can't reuse, and has really reached safety self-destruct; Secondly, only need very little trying hard to recommend in the elasticity support claw that bar just can enter the awl seat, reduced the misery that has caused to patient when injecting; Once more, the safe catch of putting back-end can stop syringe before not using during with drawing liquid faulty operation make syringe shift to an earlier date self-destruction.In a word, this utility model be a kind of inject use the back syringe needle can in be reduced in the syringe, the self-destroy safety injector of interchangeable various standard injection pins, this syringe simple in structure, processing and easy to use, safe.

Description of drawings

Fig. 1, planar structure sketch map of the present utility model;

Fig. 2, engaging piece enlarged drawing of the present utility model;

Fig. 3, the easy breakpoint enlarged drawing of push rod of the present utility model;

Fig. 4, the novel safe catch enlarged drawing of this use;

Fig. 5, the novel awl seat sketch map of this use;

Fig. 6, supporting seat sketch map of the present utility model;

Fig. 7, this utility model drawing liquid sketch map that finishes;

Fig. 8, this utility model injection finishing sketch map;

The partial enlarged drawing of Fig. 9, this utility model Fig. 8;

Sketch map contracts in Figure 10, this utility model syringe needle;

Sketch map after Figure 11, this utility model push rod fracture.

The specific embodiment

The disposable syringe of a kind of safety self-destructing as shown in Figure 1 comprises syringe 1, is installed in piston 3 in the syringe 1, can promotes the push rod 2 of piston 3 axially-movables, and the front end of described syringe 1 is equipped with a needle stand 4.

Shown in Fig. 2,3,4 and 5, needle stand 4 comprises awl seat 41 and bracing ring 42.Wherein awl seat 41 is provided with Rule circular cone 411, and its tapering is 6:100, can cooperate with the standard injection pin of all size.Awl seat 41 outer lower portion are set up two elasticity screens pieces 412, with the syringe 1 of screens piece 412 corresponding sections on be provided with stopper slot 11; The cross sectional shape of elasticity screens piece 412 and the engaging piece of screens groove 11 can be square, trapezoidal, circular, ellipse and polygon etc., in the present embodiment, the upper end of the engaging piece 4121 in elasticity screens piece 412 outsides is edged surfaces always, the lower end is an inclined-plane, and its right angle face and inclined-plane with the stopper slot 11 of syringe 1 matches.Awl seat bottom, medial wall is provided with an elasticity support claw 415, and 41 times middle parts of awl seat are provided with a circle groove 413; Between awl seat 41 body cylindricals and the syringe 1 " O " type cushion rubber 5 is installed.

Bracing ring 42 is built up in groove 413 inner chambers of boring in the seat 41, its inside and outside circle and groove fit, and its front end gos deep into groove 413 1 segment distances during assembling.Bracing ring 42 outer tops are provided with a cylinder 423, can cooperate with the elasticity screens piece 412 of awl seat 41; Damaged circle 425 is set up in bracing ring 42 outer bottoms, the stroke dimension when its defect size is rebounded above the elasticity screens piece 412 on the awl seat 41.In installation process, bracing ring 42 upwards promotes, and its outer upward cylinder 423 will be bored the elasticity screens piece 412 outside expandings of seat 41, and awl seat 41 is stuck in the stopper slot 11 of syringe 1, syringe 1 closely is connected with awl seat 41, whole awl seat 4 is fixed on syringe up and down be not shifted.

There is a tapered projection 21 on push rod 2 tops, and a pull hook 211 is set up at its middle part, and when injection finished, pull hook just was positioned at elasticity support claw 415 tops of awl seat 41 endoporus rear ends.The leading portion of push rod 2 is provided with three easy breakpoint A, B, C as shown in Figure 3, they in same plane dislocation arrange, both kept the rigidity of push rod, be convenient to die sinking again, easily can rupture once drawing.The tail end of push rod 2 is provided with safe catch 22 as shown in Figure 4, can prevent syringe not self-destruction in advance under packing, transportation and other unused state, shields.In addition, E, F, 3 easily broken places of G are set on described safe catch 22, when the nurse uses, have separated once breaking off with the fingers and thumb gently.

Shown in Fig. 5,6,7,8,9,10 and 11, drawing liquid finishes, and removes safe catch 22.In injection process, after push rod 2 pushed away certain distance, the tapered projection 21 of push rod 2 front ends is squeezed the elasticity support claw 415 of opening awl seat 41 and is entered awl seat 41 inner chambers, finish up to injection, at this moment, pull hook 21 just is positioned at elasticity support claw 415 tops of awl seat 41 endoporus rear ends, at that time, the oblique chimb 424 of inboard, bracing ring lower end closely blocks the back of elasticity support claw 415, makes when contracting in the elasticity support claw 415 and can clench pull hook 211.Simultaneously, the front boss 212 of push rod 2, when colliding upper support circle 42 lower extreme points 422 during promotion, (finishing up to injection) bracing ring has been shifted the top dead centre 414 of awl seat further groove 413 onto, at that time, the top cylinder 423 of bracing ring 42 separates with elasticity screens piece 412, and screens piece 412 just rebounds to damaged the 425 middle room that bracing ring is set up down, broken away from the screens groove 11 on the syringe 1, this moment awl seat 41 only depends on the frictional resistance of 1 of " O " type cushion rubber 5 and syringe to support.Subsequently, push rod 2 is drop-down, and supporting seat 42 moves downward under the effect of pull hook 211, and awl seat 41 is pulled in the syringe 1, has reached the purpose of safety self-destruct.

In a word, this utility model be a kind of inject use the back syringe needle can in be reduced in the syringe, the self-destroy safety injector of interchangeable various standard injection pins, this syringe simple in structure, processing and easy to use, safe.

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, the disposable syringe of a kind of safety self-destructing, comprise that a hollow barrel, is installed in the plug that the interior push rod and of described syringe is installed in described push rod front end, the front end of described syringe is equipped with a needle stand, it is characterized in that: needle stand comprises awl seat and bracing ring; The awl seat is provided with Rule circular cone, and a plurality of " O " type cushion rubber is installed between awl seat body cylindrical and the syringe; An awl seat outer lower portion is set up a plurality of elasticity screens pieces, with the syringe of screens piece corresponding section on be provided with stopper slot, its size and screens piece match; Awl seat middle part is down set up a circle groove, and the degree of depth of groove cooperates section to add the distance of pushing to stroke greater than bracing ring top; Awl seat bottom, medial wall is provided with a plurality of elasticity support claws; Bracing ring is built up in awl seat down in the central slot, and its inside and outside circle matches with groove diameter, and the protruding circle in bracing ring lower end and push rod front boss be butt mutually, and its length is greater than breaking away from a screens piece distance of boring; The outer top of bracing ring is provided with a cylinder, can cooperate with the elasticity screens piece of awl seat; Damaged circle is set up in the outer bottom of bracing ring, the stroke dimension when its defect size is rebounded above the elasticity screens piece on the awl seat; Described push rod front end has a tapered projection, and a pull hook is set up at the middle part of tapered projection; The push rod middle part is provided with three easy-to-draw breakpoints.

2, the disposable syringe of a kind of safety self-destructing as claimed in claim 1 is characterized in that: described awl seat elasticity screens piece can open and shrink; When opening and syringe screens groove engagement, will bore seat and fixedly secure on syringe, break away from engagement with syringe screens groove during contraction, make an awl disengaging syringe.

3, the disposable syringe of a kind of safety self-destructing as claimed in claim 1 is characterized in that: the cross sectional shape of the engaging piece of described awl seat elasticity screens piece and screens groove is square, trapezoidal, circular, ellipse or polygon.

4, the disposable syringe of a kind of safety self-destructing as claimed in claim 1 is characterized in that: the bracing ring in the described awl seat, can only move between the room of the corresponding groove of screens piece on the awl seat; The bracing ring lower inside is set up hypotenuse, when moving to terminal point, can closely cooperate with the elasticity support claw back on the awl seat.

5, the disposable syringe of a kind of safety self-destructing as claimed in claim 1 is characterized in that: three easy breakpoints at described push rod middle part are not in same plane.