CN2894717Y

CN2894717Y - Safety self-ruined medical syringe

Info

Publication number: CN2894717Y
Application number: CN 200620100294
Authority: CN
Inventors: 林作钱
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-12
Filing date: 2006-01-12
Publication date: 2007-05-02
Anticipated expiration: 2016-01-12

Abstract

The utility model discloses a safe self-destruction syringe, including a hollow tube, a locating ring, needle stand and core bar. A rubber plug is arranged at the head of core bar. At the inner side of the head part of the tube, a ring of concave channel is positioned. The top head of core bar is equipped with a convex plate, under which an upper-round convex plate and a lower-round convex plate are positioned. The lower-round convex plate is positioned an unresisting point. The needle stand comprises a separable conical seat and a support seat equipped in the inner hole of conical seat. An O-shape rubber ring is arranged between the outside circle of conical seat and tube. The lower part of conical seat is positioned two slots symmetrical to the central axis, and two convex plates are positioned symmetrical to the central axis between two slots, the convex plates are engaged with the corresponding concave channels in the tube, the inner bottom of conical seat is arranged a concave channel. The front end of support seat is positioned many elastic jaws which are engaged with the convex plate at the head of core bar, in the middle of the outside part of support seat, a convex rim is arranged, of which the diameter is the same with that of concave channel in the inner hole of conical seat. The end face of the convex rim presses the upper end face of concave channel in the inner hole of conical seat; the slanting end surface of the convex rim inosculates the lower end face of concave channel in the conical seat whenever the axis moves to the lower dead point. This utility model provides a new syringe which can be retracted into the tube after rejection, and the core bar can be self-destructed. This can prevent the repeating use of syringe, and moves and destroys the syringe garbage conveniently.

Description

A kind of safe self-destruction syringe for medical purpose

Technical field

This utility model relates to a kind of injector for medical purpose, and especially a kind of injection syringe needle that finishes can return back to safe self-destruction syringe for medical purpose in the syringe.

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 self-destruction needle set causes obviously causes more than other accidents.

The utility model content

The purpose of this utility model is to provide a kind of safe self-breaking syringe, the injection finish the back syringe needle can in be reduced in the syringe, and can realize the self-destruction of core bar, the repeated use of fundamentally having stopped syringe also is convenient to the carrying of syringe rubbish simultaneously and is destroyed.

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

A kind of safe self-destruction syringe for medical purpose, comprise a hollow barrel, one is installed in the screens circle of syringe bottom, one needle stand and that is installed in the syringe head is installed in the core bar in the syringe, the core bar head is installed a plug, it is characterized in that: the inner portion of described syringe is provided with a circle groove, and the top of core bar is provided with boss, the boss bottom is provided with boss platform and following boss platform, wherein descend the boss platform below be provided with easy breakpoint; Described needle stand is made up of separable awl seat and the supporting seat that is installed in awl seat endoporus, wherein bore one " O " type cushion rubber is installed between seat body cylindrical and the syringe, the groove that awl seat bottom sets up two relative central shafts to be symmetrically distributed, and the boss of in the middle of two grooves, setting up two relative central shafts to be symmetrically distributed, respective slot on boss and the syringe fastens, and awl seat endoporus is set up a groove on the bottom; Described supporting seat front end is set up a plurality of elasticity support claws that can fasten with the boss of core bar head, the outer middle side part of supporting seat is provided with a flange, lip diameter equates with awl seat endoporus groove, the end face of flange and awl seat endoporus groove upper surface be butt mutually, and the following angled end-face of flange fits tightly with the lower surface of awl seat inner groovy when moving axially to lower dead center.

The length of above-mentioned awl seat groove cooperates section and supporting seat flange length sum greater than supporting seat top.

Center head structure or thread head structure are adopted in above-mentioned awl seat top, and both heads all adopt the standard Luer circular cone, and the general syringe needle of socket one strip steel pin.

Above-mentioned awl seat top is provided with a tiny through hole, the effective glue secure bond of through hole and draw point.

The middle part of above-mentioned awl seat forms the equally distributed a plurality of spline boss of circumference, and boss upper surface shape adopts R angle or acute angle; Form the equally distributed a plurality of spline boss of circumference in the top of described syringe, the boss number equates and be meshed corresponding with it that with awl seat spline boss its bottom face is shaped as R angle or acute angle.

Above-mentioned syringe bottom inside forms upper groove, further groove and low groove, and groove and syringe inwall form the inclined-plane respectively.

The bottom of above-mentioned core bar is provided with a home block, set up three easy breakpoints between itself and the core bar, the shape of home block is superimposed together by a cylinder and thin slice, cylinder is on the top of thin slice, the outside of its side and thin slice makes the top ball of home block or the platform that the syringe bottom can be blocked in the face of cylinder on same line.

Above-mentioned core bar bottom molding one through hole is provided with one " T " font home block in the through hole, home block and through-hole wall are connected as a single entity with two easy breakpoints and an end points and core bar; The interior upper wall molding one circular arc shallow slot of through hole.

The top of above-mentioned screens circle forms a plurality of elasticity support claws, the elasticity support claw outside forms the inclined-plane, inner groovy inclined-plane bottom syringe fits respectively, elasticity support claw inner top side forms the R inclined-plane that can fit with the last boss platform interference of core bar, inside lower end form can be superimposed with the following boss platform of core bar the right angle table top; The outer middle side part of screens circle forms a flange, itself and the low groove axial sliding fit of syringe bottom, and the flange bottom forms the right angle face, and the inner groovy inclined-plane bottom itself and the syringe fits; Screens circle middle inside forms boss, can fit with the lower surface of the boss platform of core bar, and the boss decometer is died between the right angle table top of screens circle inner convex platform and elasticity support claw lower inside under the syringe self-destruction finishes the back core bar.

Above-mentioned syringe bottom upper groove matches with the length of further groove and the profile of screens circle, and the length of low groove is greater than the length of the screens circle flange that matches with it and the axial distance sum of upper groove.

It is one that needle stand in this utility model promptly engages with syringe behind the syringe of packing into collar, after liquid infusion finishes, the boss at core bar top is crossed supporting seat elasticity support claw and stuck by it, pull back core bar subsequently, core bar will drive supporting seat and move downward together, here, because of the length of boring the seat inner groovy cooperates section and supporting seat flange length sum greater than supporting seat top, this makes to have only supporting seat to bore the seat motion relatively when beginning, and awl seat maintenance itself is motionless, following angled end-face up to the supporting seat flange is moving axially to lower dead center and is fitting tightly with the lower surface of boring the seat inner groovy, at this moment, bore the groove that closely cooperates on disengaging of seat outer lug boss and the syringe, and under the drive of supporting seat, move to the syringe bottom.Corresponding the fastening of elasticity Convex chuck of the annular screens circle of the collar on core bar bottom being arranged on syringe, core bar can not be extracted out, can not before push away, the locked bottom to syringe of the head of core bar, this moment, whole syringe needle and needle stand were reduced to the syringe the inside in fully, realized the self-destruction of contracting in the syringe needle.Slightly firmly it is fractureed or break from core bar easily broken at last, the head of core bar is destroyed in syringe, realize the second step self-destruction of syringe.

In addition, " O " RunddichtringO of installing between the awl seat body outside and the syringe, make needle stand behind the syringe of packing into, guarantee to have good sealing function, simultaneously in order to prevent that needle stand rotates and brings misery to the patient when syringe uses, the middle part of awl seat forms the equally distributed a plurality of spline boss of circumference, its with the syringe top in corresponding being meshed of spline boss of molding.

In addition, the core bar bottom is provided with a home block, and the platform of syringe bottom can be blocked in the top ball of home block or the face of cylinder, plays position-limiting action in the transportation of syringe with before using, and can prevent self-destruction in advance.

Description of drawings

Fig. 1, planar structure cutaway view of the present utility model;

The planar structure cutaway view of Fig. 2, this utility model syringe;

The planar structure cutaway view of Fig. 3, this utility model core bar;

The planar structure cutaway view of Fig. 4, this utility model awl seat;

The planar structure cutaway view of second embodiment of Fig. 5, this utility model awl seat;

The planar structure cutaway view of the 3rd embodiment of Fig. 6, this utility model awl seat;

The planar structure cutaway view of Fig. 7, this utility model supporting seat;

The planar structure cutaway view of Fig. 8, this utility model screens circle;

The planar structure cutaway view that Fig. 9, this utility model drawing liquid finish;

The planar structure cutaway view that Figure 10, this utility model liquid infusion finish;

Figure 11, this utility model begin the planar structure cutaway view of the self-destruction first step;

Figure 12, this utility model begin the self-destruction planar structure cutaway view in second step;

Figure 13, this utility model begin the self-destruction planar structure cutaway view in the 3rd step;

The planar structure cutaway view that Figure 14, this utility model self-destruction finish;

The planar structure sketch map of second kind of embodiment of home block on Figure 15, this utility model core bar;

The perspective view at home block position among Figure 16, this utility model Figure 15.

The specific embodiment:

As illustrated in fig. 1 and 2, a kind of safe self-destruction syringe for medical purpose, comprise a hollow barrel 1, the needle stand and one that the one screens circle 3, that is installed in syringe 1 bottom is installed in syringe 1 head is installed in the core bar 2 in the syringe 1, and core bar 2 heads are installed a plug 7, the inner portion of described syringe 1 is provided with a circle groove 12, syringe 1 bottom inside forms

upper groove

13, and 15, three grooves of further groove 14 and low groove and syringe inwall form inclined-plane 131,141,151 respectively.

As shown in Figure 3, the top of core bar 2 is provided with boss 21; Core bar 2 tops are provided with boss platform 24 and following boss platform 25, wherein descend boss platform 25 below be provided with easy breakpoint 22.The bottom of core bar 2 is provided with a home block 23, set up three easy breakpoints 231 between itself and the core bar 2, need in use home block 23 is got rid of from easy breakpoint 231, the shape of home block 23 is superimposed together by a cylinder 232 and thin slice 233, cylinder 232 is on the top of thin slice 233, the outside of its side and thin slice 233 is on same line, make the top ball of home block 23 or the platform that syringe 1 bottom can be blocked in the face of cylinder, play position-limiting action in the transportation of syringe with before using, can prevent self-destruction in advance.Shown in Figure 15 and 16, for the another kind of core bar home block is implemented structure, promptly core bar bottom molding one through hole 24 ', be provided with in the through hole one " T " font home block 23 ', home block 23 ' with through-hole wall with two easy breakpoints 231 ' and end points 233 ' be connected as a single entity with core bar; Through hole 24 ' interior upper wall molding one circular arc shallow slot 234 '.Home block 23 before injection ' the platform of upper surface 232 ' can block syringe bottom, under external force can be when start injection with home block along end points 233 ' rotation, make the easy breakpoint 231 ' disconnection on top, with the lateral wall of home block snap in circular arc shallow slot 234 '.

Needle stand is made up of separable awl seat 5 and the supporting seat 6 that is installed in awl seat 5 endoporus, wherein between awl seat 5 body cylindricals and the syringe 1 one " O " type cushion rubber 8 is installed, and makes needle stand guarantee to have good sealing function behind the syringe of packing into.The center head structure can be adopted in awl seat 5 tops, as shown in Figure 4, or adopt the thread head structure, as shown in Figure 5, both heads all adopt standard Luer circular cone 56 (or 56 '), directly the general syringe needle (4) of socket one strip steel pin is convenient to the replacement of different size syringe needle, in addition, awl seat 5 tops also can straight forming one tiny through hole 57 structure, as shown in Figure 6, through hole 57 and draw point pipe 58 glue secure bond adopt the center head structure in the present embodiment.The groove 52 that awl seat 5 bottoms set up two relative central shafts to be symmetrically distributed, and the boss 54 of in the middle of two grooves 52, setting up two relative central shafts to be symmetrically distributed, respective slot 12 on boss 54 and the syringe 1 fastens, and awl seat 5 endoporus are set up a groove 53 on the bottom.

As shown in Figure 7, supporting seat 6 front ends are set up a plurality of elasticity support claws 61 that can fasten with the boss 21 of core bar 2 heads, supporting seat 6 outer middle side parts are provided with a flange 62, flange 62 diameters equate with awl seat endoporus groove 53, the end face 622 of flange 62 and awl seat endoporus groove upper surface 532 be butt mutually, and the following angled end-face 621 of flange fits tightly with the lower surface 531 of awl seat inner groovy 53 when moving axially to lower dead center.

Here, can break away from syringe groove 12 smoothly in order to guarantee awl seat boss 54, the length of awl seat groove 53 cooperates section and supporting seat flange 62 length sums greater than supporting seat top.In addition, in order to prevent that needle stand rotates and brings misery to the patient when syringe uses, need to give the constraint that adds a circumference direction of rotation between awl seat 5 and the syringe 1, the structure that adopts the spline boss to be meshed in this utility model, middle part at awl seat 5 forms the equally distributed a plurality of spline boss 51 of circumference, and this boss upper surface shape adopts R angle or acute angle; Form simultaneously the equally distributed a plurality of spline boss 11 of circumference in the top of syringe 1, boss 11 numbers equate and be meshed corresponding with it with awl seat spline boss 51, and boss 11 bottom faces are shaped as R angle or acute angle.

As shown in Figure 8, the top of screens circle 3 forms a plurality of elasticity support claws 34, elasticity support claw 34 outsides form inclined-plane 31,32, inner groovy inclined-plane 131,141 bottom syringe fits respectively, elasticity support claw 34 inner top side form the R inclined-plane 36 that can fit with last boss platform 24 interference of core bar 2, inside lower end form can be superimposed with the following boss platform 25 of core bar 2 right angle table top 341.Screens circle 3 outer middle side parts form a flange 35, low groove 15 axial sliding fits of itself and syringe bottom, and flange 35 bottoms form right angle face 33, and its inner groovy inclined-plane 151 bottom syringe fits.Screens circle 3 middle inside form boss 37, can fit with the lower surface of the following boss platform 25 of core bar 2, boss platform 25 is stuck between screens circle boss 37 and elasticity support claw right angle table top 341 under the syringe self-destruction finishes the back core bar, in order to guarantee core bar 2 stuck can finishing smoothly, syringe 1 bottom upper groove 13 matches with the length of further groove 14 and the profile of screens circle 3, and the length of low groove 15 is greater than the length of the screens circle flange 35 that matches with it and the axial distance sum of upper groove 13.

Shown in Fig. 1,9,10,11,12,13,14 and 15, be the whole use overall process of this utility model, wherein Fig. 1 is the cutaway view of unused state, the top ball of home block 23 or the platform that syringe 1 bottom is blocked on the face of cylinder play position-limiting action at this moment.The action diagram that Fig. 9 finishes for drawing liquid 231 got rid of home block 23 along easily broken place before injection with it, cancel spacing.As Figure 10,11,12,13 and 14 finish and the action diagram that finishes of self-destruction for liquid infusion, in the middle of this process, after liquid infusion finishes, the boss 21 at core bar top passes the elasticity support claw 61 of supporting seat and stuck with it, pull back core bar 2 subsequently, core bar 2 will drive supporting seat 6 and move downward together, here, because of the length of boring seat inner groovy 53 cooperates section and supporting seat flange 62 length sums greater than supporting seat 6 tops, this makes to have only supporting seat 6 awl seat 5 motions relatively when beginning, and awl seat 5 itself keeps motionless, following angled end-face 621 up to supporting seat flange 62 is moving axially to lower dead center and is fitting tightly with the lower surface 531 of boring seat inner groovy 53, at this moment, close-fitting groove 12 on 54 disengagings of awl seat outer lug boss and the syringe 1, and under the drive of supporting seat 6, move to syringe 1 bottom.When the 2 times boss platforms of core bar 25 of rollback and the inner convex platform 37 of screens circle collide fashionable, continue to pull back core bar, because of the length of the low groove 15 of syringe 1 bottom endoporus greater than the length of the screens circle flange 35 that matches with it and the axial distance sum of upper groove 13, this makes screens circle flange 35 leave one section idle running when being mated, thereby make screens circle 3 with core bar 2 relative syringe 1 actions, each inclined-plane, the outside of screens circle 3 breaks away from associated syringe 1 inclined-plane gradually, stuck between screens circle right angle face 341 and inner convex platform 37 up to boss platform under the core bar 25, the top end face of screens this moment circle elasticity support claw 34 closely engages with the right angle end face 16 of the interior further groove 14 of syringe, make core bar 2 locked inside at syringe 1, can not advance and to pull out, this moment, whole syringe needle and needle stand were reduced to syringe 1 the inside in fully, realized the self-destruction of contracting in the syringe needle.Slightly firmly it is fractureed or break from easily broken 22 of core bar 2 at last, the head of core bar 2 is destroyed in syringe 2, realize core bar 2 self-destructions.

In a word, this utility model finishes the back retractable needle in syringe in injection, and can realize the self-destruction of core bar, the repeated use of fundamentally having stopped syringe, and the while also is convenient to the carrying of syringe rubbish and destroys.

Claims

1, a kind of safe self-destruction syringe for medical purpose, comprise a hollow barrel (1), one is installed in the screens circle (3) of syringe bottom, one needle stand and that is installed in the syringe head is installed in the core bar (2) in the syringe, core bar (2) head is installed a plug (7), it is characterized in that: the inner portion of described syringe (1) is provided with a circle groove (12), the top of core bar (2) is provided with boss (21), boss (21) bottom is provided with boss platform (24) and following boss platform (25), wherein descend boss platform (25) below be provided with easy breakpoint (22); Described needle stand is made up of separable awl seat (5) and the supporting seat (6) that is installed in an awl endoporus, wherein between awl seat (5) body cylindrical and the syringe (1) one " O " type cushion rubber (8) is installed, the groove (52) that awl seat (5) bottom sets up two relative central shafts to be symmetrically distributed, and the boss (54) of in the middle of two grooves, setting up two relative central shafts to be symmetrically distributed, respective slot (12) on boss (54) and the syringe fastens, and awl seat endoporus is set up a groove (53) on the bottom; Described supporting seat (6) front end is set up a plurality of elasticity support claws (61) that can fasten with the boss (21) of core bar (2) head, the outer middle side part of supporting seat (6) is provided with a flange (62), lip diameter equates with awl seat endoporus groove (53), the end face of flange (622) and awl seat endoporus groove upper surface (532) be butt mutually, and the following angled end-face (621) of flange fits tightly with the lower surface (531) of awl seat inner groovy (53) when moving axially to lower dead center.

2, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, base is characterised in that: the length of described awl seat groove (53) cooperates section and supporting seat flange (62) length sum greater than supporting seat top.

3, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, base is characterised in that: center head structure or thread head structure are adopted in described awl seat 5 tops, and both heads all adopt standard Luer circular cone (56), and the general syringe needle (4) of socket one strip steel pin.

4, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, base is characterised in that: described awl seat 5 tops are provided with a tiny through hole (57), and through hole (57) is used the glue secure bond with draw point pipe (58).

5, as claim 1,2,3 or 4 described a kind of safe self-destruction syringe for medical purpose, base is characterised in that: the middle part of described awl seat (5) forms the equally distributed a plurality of spline boss of circumference (51), and boss upper surface shape adopts R angle or acute angle; Form the equally distributed a plurality of spline boss of circumference (11) in the top of described syringe (1), boss (11) number equates and be meshed corresponding with it that with awl seat spline boss (51) its bottom face is shaped as R angle or acute angle.

6, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, it is characterized in that: described syringe (1) bottom inside forms upper groove (13), further groove (14) and low groove (15), groove and syringe inwall form inclined-plane (131), (141), (151) respectively.

7, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, it is characterized in that: the bottom of described core bar (2) is provided with a home block (23), set up three easy breakpoints (231) between itself and the core bar, the shape of home block is superimposed together by a cylinder (232) and thin slice (233), cylinder (232) is on the top of thin slice (233), the outside of its side and thin slice (233) makes the top ball of home block (23) or the platform that the syringe bottom can be blocked in the face of cylinder on same line.

8, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, it is characterized in that: described core bar bottom molding one through hole (24 '), be provided with one " T " font home block (23 ') in the through hole, home block (23 ') is connected as a single entity with core bar with two easy breakpoints (231 ') and an end points (233 ') with through-hole wall; The interior upper wall molding one circular arc shallow slot (234 ') of through hole.

9, as claim 1 or 6 described a kind of safe self-destruction syringe for medical purpose, it is characterized in that: the top of described screens circle (3) forms a plurality of elasticity support claws (34), elasticity support claw (34) outside forms inclined-plane (31), (32), inner groovy inclined-plane (131), (141) bottom syringe fit respectively, elasticity support claw (34) inner top side forms the R inclined-plane (36) that can fit with last boss platform (24) interference of core bar (2), inside lower end form can be superimposed with the following boss platform (25) of core bar (2) right angle table top (341); The outer middle side part of screens circle (3) forms a flange (35), low groove (15) axial sliding fit of itself and syringe bottom, and flange (35) bottom forms right angle face (33), and its inner groovy inclined-plane (151) bottom syringe fits; Screens circle (3) middle inside forms boss (37), can fit with the lower surface of the boss platform (25) of core bar (2), boss platform (25) is stuck between screens circle boss (37) and elasticity support claw right angle table top (341) under the syringe self-destruction finishes the back core bar.

10, a kind of safe self-destruction syringe for medical purpose as claimed in claim 9, it is characterized in that: described syringe bottom upper groove (13) matches with the length of further groove (14) and the profile of screens circle (3), and the length of low groove (15) is greater than the length of the screens circle flange (35) that matches with it and the axial distance sum of upper groove (13).