CN2845821Y

CN2845821Y - Safety self destroying medical syringe

Info

Publication number: CN2845821Y
Application number: CN 200520116522
Authority: CN
Inventors: 林作钱
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-18
Filing date: 2005-11-18
Publication date: 2006-12-13
Anticipated expiration: 2015-11-18

Abstract

The utility model discloses a safety self destroying medical syringe which comprises a hollow needle cylinder, a core rod arranged in the needle cylinder and a rubber plug arranged at the front part of the core rod, wherein the front end of the needle cylinder is provided with an interchangeable needle seat and a protective sleeve arranged on the outer side of the interchangeable needle seat, a plurality of spline bosses which are uniformly distributed in an inner ring circumference way are formed in an inner hole of the head of the needle cylinder and are correspondingly engaged with spline bosses on the outer side of the head of a thread connecting seat; a concave ring is formed on the inner side at the bottom of the needle cylinder and is provided with an interference fit positioning clamping ring. A needle head is positioned in the needle cylinder after the utility model is used for injection, the rubbish of syringes is conveniently transported, destroyed and treated, the condition that medical staff is pricked can not occur and the secondary cross infection of germs is avoided.

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 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, injects the core bar that finishes and is destroyed in the interior injector for medical purpose of syringe.

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

A kind of safe self-destruction syringe for medical purpose comprises a hollow barrel; One is installed in the core bar in the described syringe, be installed in the forward plug of core bar, described syringe front end is installed an interchangeable needle stand, an and sheath that is installed in the interchangeable needle stand outside, it is characterized in that: the head endoporus of described syringe forms and is the equally distributed a plurality of spline boss of internal ring circumference, and its spline boss with the threaded connection seat head outside is corresponding meshing; The bottom inside of syringe forms scrobicular ring, and the screens circle of an interference fit is set on the scrobicular ring.

The end face in shape of the spline boss of above-mentioned syringe is right angle or acute angle, and the lower surface is wedge angle, R type or arc.

The shape of the spline boss of above-mentioned threaded connection seat is corresponding with the shape of the spline boss of syringe, can be wedge angle, R shape or arc.

Form female thread on outer ring, the top inner hole wall of above-mentioned threaded connection seat, engage with the needle stand rotation; The top of inner Rule circular cone forms many elasticity support claws; The joint seat bottom outside forms a scrobicular ring and cooperates with sealing ring.

Above-mentioned annular screens circle is a landolsring, and its outside forms two boss, the interior scrobicular ring corresponding with the bottom of syringe closely engages; Screens circle head is set up a plurality of elasticity Convex chucks, the inboard bottom face of elasticity Convex chuck be shaped as square, its upper surface with the core bar collar engages, and the plane that is shaped as at the top of elasticity Convex chuck is connected with chamfered transition, and the lower surface of another collar of itself and push rod is superimposed.

The top of above-mentioned core bar is provided with spherical boss, and the support claw of itself and needle stand fastens; Core bar top is provided with two collars, and inboard bottom face and the upper surface with the elasticity Convex chuck of annular screens circle fastens respectively.

Above-mentioned core bar bottom is provided with a through hole and cooperates with backing pin.

The employing spline boss screens of syringe of the present utility model and threaded connection seat fastens, and the self-destruction in advance before having avoided on the one hand using also prevents to rotate between the two in use simultaneously, alleviates the misery of bringing to the patient.The bottom inside of syringe forms two scrobicular rings, interference fit is provided with a screens circle on it, the head of screens circle is set up two elasticity Convex chucks, after injection finishes core bar pull backward, the bottom face of two Convex chucks is engaged with the collar upper surface of core bar, core bar can not be extracted out, can not before push away, reach the purpose of self-destruction.Here, the screens circle is a landolsring, and being convenient to its syringe bottom of packing into is one with its card.

This utility model threaded connection seat bottom molding one scrobicular ring cooperates with sealing ring, makes the threaded connection seat behind the syringe of packing into, and good sealing function is arranged; Head forms the elasticity support claw more than two, and is stuck with the vertical spherical boss of core bar after injection finishes.

In addition, the core bar bottom is provided with a through hole and cooperates with backing pin, and half of backing pin enters in the pin-and-hole when preparing the drawing liquid body, and the bottom face butt of second half surface and syringe plays position-limiting action, has avoided the self-destruction that shifts to an earlier date of syringe.

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 threaded connection seat;

Fig. 4, this utility model sectional view on the A-A that is threaded;

The planar structure cutaway view of Fig. 5, this utility model screens circle;

The vertical view of Fig. 6, this utility model Fig. 4;

The planar structure cutaway view of Fig. 7, this utility model core bar;

Fig. 8, this utility model are prepared the planar structure cutaway view of drawing liquid;

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 injection finish;

The planar structure cutaway view that Figure 11, this utility model self-destruction finish;

The specific embodiment:

Shown in Fig. 1,2 and 3, a kind of safe self-destruction syringe for medical purpose comprises a hollow barrel 1; One is installed in the core bar 4 in the described syringe 1, be installed in core bar 4 forward plugs 7, syringe 1 front end is installed an interchangeable needle stand 8, an and sheath that is installed in interchangeable needle stand 8 outsides, the head endoporus of syringe 1 forms and is the equally distributed a plurality of spline boss 11 of internal ring circumference, its in shape end face can be right angle or acute angle, the lower surface can be wedge angle, R type or arc.Spline boss 11 is corresponding meshing with the spline boss 21 in the threaded connection seat 2 heads outside, and the shape of the spline boss 21 of threaded connection seat 2 is corresponding with the shape of the spline boss 11 of syringe, can be wedge angle, R shape or arc.Such snap-in structure, avoided on the one hand syringe when mounted threaded connection seat 2 enter syringe 1 and cause self-destruction in advance, also prevent that syringe 1 and 2 of threaded connection seats rotate in use simultaneously, avoided bringing misery to the patient.In addition, the bottom inside of syringe 1 forms scrobicular ring 11,12 in two, and the screens circle 3 of an interference fit is set on the scrobicular ring.

Shown in Fig. 3 and 4, form female thread 23 on outer ring, the top inner hole wall of threaded connection seat 2, it engages with the boss rotation in needle stand 8 outsides; Circular cone top, threaded connection seat 2 inner Rule forms many elasticity support claws 22, and is stuck with the vertical spherical boss of core bar 4 41 after injection finishes.Threaded connection seat 2 bottom outside form a scrobicular ring 24 and cooperate with sealing ring 25, make threaded connection seat 2 behind the syringe 1 of packing into, and good sealing function is arranged.

As illustrated in Figures 5 and 6, annular screens circle 3 is a landolsring, is convenient to its syringe 1 bottom and syringe 1 card of packing into and is one.Annular screens circle 3 outsides form two

boss

31,32, and corresponding with syringe 1 bottom respectively interior scrobicular ring 12,13 closely engages; Screens circle 3 heads are set up a plurality of elasticity Convex chucks 33, elasticity Convex chuck 33 inboard bottom faces 331 be shaped as square, its upper surface with core bar collar 42 engages, and the plane that is shaped as at the top 332 of elasticity Convex chuck 33 is connected with chamfered transition, and collar 44 lower surfaces of itself and core bar are superimposed.

As described in Figure 7, the top of core bar 4 is provided with spherical boss 41, and its elasticity support claw 22 with the seat 2 that is threaded fastens; Core bar 4 tops are provided with two collars 42,44, inboard bottom face 331 and upper surface 332 with the elasticity Convex chuck 33 of annular screens circle 3 fastens respectively, after injection finishes core bar 4 pull backward, the bottom face of two Convex chucks 33 is engaged with the collar 42,44 of core bar 4, at this moment, core bar 4 can not be extracted out, can not before push away, reach the purpose of self-destruction.In addition, core bar 4 bottoms are provided with a through hole 43 and cooperate with backing pin 5, and half of backing pin 5 enters in the pin-and-hole 43 when preparing the drawing liquid body, and the bottom face butt of second half surface and syringe 1 plays position-limiting action, has avoided the self-destruction that shifts to an earlier date of syringe.

As Fig. 1,8,9,10 and shown in Figure 11, be the whole use overall process of this utility model, wherein Fig. 1 is the cutaway view of unused state, Fig. 8 is for preparing the cutaway view of drawing liquid, this moment, second half surface of backing pin 5 contacted with the bottom face of syringe 1, prevent that core bar 4 from continuing to make it self-destruction in advance forward, begins drawing liquid then.The cutaway view that Fig. 9 finishes for drawing liquid pushes second half of backing pin 5 in pin-and-hole 43 of core bar 4 earlier before the injection.Figure 10 pushes away the action diagram that liquid finishes, and at this moment backing pin 5 no longer cuts any ice, and it is stuck with it that the spherical boss 41 of core bar 4 heads pushed away the elasticity support claw 22 of threaded connection seat 2.The action diagram that Figure 11 finishes for self-destruction, at this moment the spherical boss 41 of core bar 4 heads is stuck with the elasticity support claw 22 of threaded connection seat 2, continue to pull back core bar 4, a spline boss 21 in the head outside that is threaded separates with the spline boss 11 of syringe 1, it is moved to syringe 1 bottom with needle stand 8, collar 42,44 up to core bar 4 engages with the Convex chuck 33 of screens circle, and the locked bottom to syringe of the head of core bar 4, self-destruction finishes.

This utility model uses the back syringe needle to be positioned at the syringe the inside in injection, be convenient to syringe rubbish carrying, destroy, can not cause the thing of stabbing the medical and nursing work personnel to take place simultaneously yet, avoided the secondary cross infection of pathogenic bacteria.

Claims

1, a kind of safe self-destruction syringe for medical purpose, comprise a hollow barrel (1), one is installed in the core bar (4) in the described syringe (1), be installed in the forward plug of core bar (4) (7), described syringe (1) front end is installed an interchangeable needle stand (8), an and sheath that is installed in interchangeable needle stand (8) outside, it is characterized in that: the head endoporus of described syringe (1) forms and is the equally distributed a plurality of spline boss of internal ring circumference (11), and its spline boss (21) with threaded connection seat (2) the head outside is corresponding meshing; The bottom inside of syringe (1) forms two scrobicular rings (12), (13), and the screens circle (3) of an interference fit is set on the scrobicular ring.

2, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1 is characterized in that: the end face in shape of the spline boss (11) of described syringe (1) is right angle or acute angle, and the lower surface is wedge angle, R type or arc.

3, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1 or 2 is characterized in that: the shape of the spline boss (21) of described threaded connection seat (2) is corresponding with the shape of the spline boss (11) of syringe, can be wedge angle, R shape or arc.

4, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1 is characterized in that: form female thread (23) on outer ring, the top inner hole wall of described threaded connection seat (2), engage with needle stand (8) rotation; The top of inner Rule circular cone forms many elasticity support claws (22); Joint seat (2) bottom outside forms a scrobicular ring (24) and cooperates with sealing ring (25).

5, a kind of safe self-destruction syringe for medical purpose as claimed in claim 1, it is characterized in that: described annular screens circle (3) is a landolsring, and its outside forms two boss (31), (32) two interior scrobicular rings (12), (13) closely engaging corresponding with the bottom of syringe (1); Screens circle (3) head is set up a plurality of elasticity Convex chucks (33), the inboard bottom face of elasticity Convex chuck (33) (331) be shaped as square, its upper surface with the collar (42) of core bar (4) engages, the plane that is shaped as at the top of elasticity Convex chuck (332) is connected with chamfered transition, and collar (44) lower surface of itself and core bar (4) is superimposed.

6, as claim 1 or 5 described a kind of safe self-destruction syringe for medical purpose, it is characterized in that: the top of described core bar (4) is provided with spherical boss (41), and the support claw (22) of itself and needle stand (8) fastens; Core bar (4) top is provided with two collars (42), (44), and inboard bottom face (331) and upper surface (332) with the elasticity Convex chuck (33) of annular screens circle (3) fasten respectively.

7, a kind of safe self-destruction syringe for medical purpose as claimed in claim 6 is characterized in that: described core bar (4) bottom is provided with a through hole (43) and cooperates with backing pin (5).