CN101444651A

CN101444651A - Auto-disable syringe

Info

Publication number: CN101444651A
Application number: CNA2008102441412A
Authority: CN
Inventors: 赵宽; 柏保东
Original assignee: ANHUI TIANKANG MEDICAL PRODUCTS Co Ltd
Current assignee: ANHUI TIANKANG MEDICAL PRODUCTS Co Ltd
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2009-06-03

Abstract

The invention relates to an auto-disable syringe which comprises a core rod, a housing, a piston, a needle tube and a protective sleeve, wherein, the piston is arranged at the front end of the core rod, the core rod provided with the piston is placed in the housing, the needle tube is arranged at the front end of the housing and matched with the protective sleeve, and a self-destruction dummy club is arranged on the inner wall of the housing; an annular groove is formed at the corresponding point between the core rod and the self-destruction dummy club on the housing, a backstop card is matched in the annular groove, a fracture zone is arranged on the core rod between the annular groove and a knob, and the core rods at the both ends of the fracture zone are connected through a contact point. The invention has the advantages that the structure is compact, and the self-destruction process is finished by the housing and the core rod; the processing of the production mold of the core rod is simpler, the distance between the fracture zone and the front end of the piston is smaller or equal to the actual depth of the housing, and a great part of the fractured core rod is positioned in the housing by the backstop card and cannot be withdrawn after self-destruction; and before the backstop card passes over the self-destruction dummy club of the housing, the core rod can be freely pulled in the housing for medicine dissolving operation.

Description

Self-destruction syringe

Technical field

The present invention relates to a kind of self-destruction syringe.

Background technology

Injection generally comprises water preparation and powder, as everyone knows, the powder injection can not be directly used in injection, must it be dissolved fully by solvent, often need in the use to drive piston back and forth movement in overcoat by the push-and-pull repeatedly of core bar, in the overcoat of piston nose, form the molten medicine zone that volume constantly changes, the push-and-pull repeatedly of core bar makes solvent produce disturbance, solvent and powder are only just fully dissolved rapidly in the disturbance that constantly changes easily, just can be used for injection after powder dissolves fully.

Modern medicine proves, for avoiding to the mankind or animal input or cross infection takes place when taking out medium, hypodermic syringe must disposable use.Disposable syringe worldwide is extensive use of, but it is found that in recent years disposable syringe is reused by lawless person's recovery, so last century Mo health organization proposed disposable syringe and should have the function of self-destruction, can destroy voluntarily after the use or locked and can not reuse.

This case applicant has proposed the utility application that name is called " the aseptic self-destruction syringe of disposable use " on March 17th, 2005 to Patent Office of the People's Republic of China, and be awarded patent right on June 14th, 2006, the patent No. is: ZL200520069955.9, this patent changes traditional piston into rubber piston, and elastic seal ring and sheath have been disposed, solved the easy pollution problems of leakage and needle tubing preferably, but how form molten medicine zone in the overcoat before piston, do not propose solution effectively, this scheme can not be used for the powder injection of lyophilized powder and so on equally.

The applicant has submitted to name to be called " disposable type self-destroyed trace input syringe " PCT application on November 13rd, 2006, international application no is PCT/CN2006/003048, this patent application is provided with a no circular cone step and ganoid zone as molten medicine zone on core bar, solved molten medicine problem preferably, provide convenience for traditional self-destruction syringe uses the powder of lyophilized powder and so on.

Because self-destruction syringe is different with the core bar that the type self-destroyed trace input syringe that molten medicine function is arranged uses, even if produce two kinds of self-destruction syringes of same size, core bar is die sinking separately also, and production cost is higher.

This case applicant has proposed the application for a patent for invention that name is called " a kind of syringe core rod and the application in syringe thereof " on July 9th, 2008 to Patent Office of the People's Republic of China, number of patent application is 200810123583.1, a kind of have concurrently molten medicine and non-molten Types of Medicine core bar and the application in self-destruction syringe thereof are provided, have realized in molten medicine and non-molten Types of Medicine core bar processing with problem with a mould.

At present, the core bar in above-mentioned various self-destruction syringes, because ubiquity is piled up neatly folded circular cone step successively, the structure more complicated causes the processing of production mould relatively more difficult, cost is higher.In addition, the many designs of self-destruction syringe self-destruction characteristic on the market are at the piston connecting portion of the front end of core bar, reach self-destruction by the interior pawl that forms, or needle tubing and overcoat connecting portion, the self-destruction characteristic needs by overcoat, core bar, piston, or three parts of overcoat, core bar, needle tubing cooperate and finish, and carelessness is arranged slightly, can not self-destruction.

Summary of the invention

The objective of the invention is to: at the structure more complicated of the core bar that exists in the present self-destruction syringe, the Mould Machining cost is higher, and the self-destruction characteristic needs by overcoat, core bar, piston, or three parts of overcoat, core bar, needle tubing cooperate and finish, carelessness is arranged slightly, practical problem that can not self-destruction provides a kind of new self-destruction syringe.

The object of the present invention is achieved like this: a kind of self-destruction syringe, comprise core bar, overcoat, piston, needle tubing and sheath, the front end of core bar is provided with piston, the core bar that contains piston places overcoat, needle tubing is fixedly installed on the front end of overcoat, needle tubing is furnished with sheath, it is characterized in that: the inwall of overcoat is provided with the self-destruction boss one; Core bar with put self-destruction boss corresponding position outward and be provided with annular groove, be furnished with the retaining card in the annular groove, annular groove and be provided with fracture belt by the core bar between the hands, the core bar at fracture belt two ends connects by contact point.

In the present invention: the inwall of overcoat is provided with the rear portion that one self-destruction boss is positioned at overcoat, and the distance that piston nose is taken in fracture to is less than or equal to the actual grade in the overcoat.

In the present invention: described retaining card is segmental flexure strip, and segmental radius is greater than the radius of overcoat self-destruction boss place inner chamber, places the annular groove of the core bar bottom of packing into behind the outer suit to draw in and be coniform, and cone shape awl bottom surface is to pressing hands.

In the present invention: the core bar at described fracture belt two ends connects by the contact point that is evenly distributed on the core bar periphery.

In the present invention: the core bar at described fracture belt two ends connects by 3～5 contact points that are evenly distributed on the core bar periphery.

In the present invention: the piston of core bar front end adopts rubber piston; Described is anti-skid structure by watch face, and described anti-skid structure is for pressing the equally distributed protruding weir of watch face or groove or salient point or pit.

The invention has the advantages that: compact conformation of the present invention, the self-destruction process is finished by overcoat and core bar; The retaining card is segmental flexure strip, because segmental radius is greater than the radius of overcoat self-destruction boss place inner chamber, place the annular groove jacket bottom of packing into to draw in and to be coniform, cone shape awl bottom surface is to pressing hands, after the retaining card is crossed the self-destruction boss, under elastic effect, locked after launching at the bottom of the cone shape awl by the self-destruction boss; Because only be provided with an annular groove and a fracture belt on the core bar, the processing of production mould is fairly simple; Be less than or equal to the interior actual grade of overcoat because the distance of piston nose is taken in fracture to, after the self-destruction, post-rift most of core bar will be positioned in the overcoat by the retaining card, can't withdraw from; Because piston adopts rubber piston, good airproof performance; Because the inwall of overcoat is provided with the rear portion that one self-destruction boss is positioned at overcoat, before the retaining card is not crossed the self-destruction boss of overcoat, core bar can be in overcoat free pull, carry out molten medicine operation.

Description of drawings

Fig. 1 is the jacket structure sketch map of the embodiment of the invention;

Fig. 2 is core bar, the piston structure sketch map of the embodiment of the invention;

Fig. 3 is the use sketch map of the embodiment of the invention, and wherein a, the state before using, are inhaled the medicine process at b, c, exhaust process, and d, injection finish the state after e, the self-destruction.

Among the figure: 1, overcoat, 2, the self-destruction boss, 3, core bar, 4, annular groove, 5, the retaining card, 6, fracture belt, 7, press hands, 8, contact point, 9, anti-skid structure, 10, piston, 11, needle tubing, 12, the medicinal liquid bottle

The specific embodiment

Accompanying drawing discloses the concrete structure of the embodiment of the invention without limitation, and the invention will be further described below in conjunction with accompanying drawing.

As seen from Figure 1, overcoat of the present invention 1 is that with the difference of traditional overcoat the inwall of overcoat is provided with the self-destruction boss one, and in the present embodiment, described self-destruction boss 2 is located at the rear portion of overcoat 1.

As seen from Figure 2, the front end of core bar 3 of the present invention is a piston, and self-destruction boss 2 corresponding positions are provided with annular groove 4 on core bar 3 and the overcoat 1, are furnished with retaining card 5 in the annular groove 4, annular groove 4 and be provided with fracture belt 6 by the core bar between the hands 73, the core bar 3 at fracture belt 6 two ends connects by contact point 8.In the present embodiment, described piston 10 is a rubber piston, described retaining card 5 is segmental flexure strip, segmental radius is greater than the radius of overcoat self-destruction boss place 1 inner chamber, place annular groove 4 overcoat 1 of packing into to move ahead by self-destruction boss 2 time bottom and draw in and be coniform, cone shape awl bottom surface is to pressing hands.After core bar was pushed into the overcoat back cover, retaining card 5 was crossed self-destruction boss 2, and it is simultaneously locked by the self-destruction boss that conical base launches to recover the original state of retaining card naturally; Simultaneously, be anti-skid structure 9 by watch face, when specifically implementing, anti-skid structure 9 can be for pressing hands 7 equally distributed protruding weir, surface or groove or salient point or pits.

Fig. 3 has disclosed use of the present invention, by 3 as seen, structure of the present invention is: the front end of core bar 3 is provided with piston 10, the core bar 3 that contains piston 10 places overcoat, needle tubing 11 is fixedly installed on the front end of overcoat 1, needle tubing 11 is furnished with the sheath (not shown), and the inwall of overcoat 1 is provided with self-destruction boss 2 one; Self-destruction boss 2 corresponding positions are provided with annular groove 4 on core bar 3 and the overcoat 1, are furnished with retaining card 5 in the annular groove 4, annular groove 4 be provided with fracture belt 6 by the core bar between the hands 73, the core bar at fracture belt 6 two ends is by contact point 8 connections.By a figure as seen, before the use, annular groove 4 in the core bar 3 and retaining card 5 all are arranged in self-destruction boss 2 rear portions of overcoat 1 inwall, and pull is freely in overcoat 1 for core bar 3; By b figure as seen, inhaling the medicine process is that needle tubing 11 is thrust in the medicinal liquid bottle 12, and the piston 10 that will be arranged in overcoat 1 sucks medicinal liquid by core bar 3 post-tensionings.By c figure as seen, need to promote piston 10 forward air-out or unnecessary medicinal liquid before the injection by core bar 3.By d figure as seen, after injection finished, piston 10 was positioned at the end of overcoat 1, annular groove 4 in the core bar 3 and retaining card 5 are all crossed the self-destruction boss 2 in overcoat 1 inwall, under the effect of retaining card 5 and self-destruction boss 2, core bar 3 is pull backward, causes syringe can't continue to use.By e figure as seen, if continue pull core bar 3 backward after injection finishes, the contact point 8 in core bar 3 fracture belts 6 will rupture, and forms self-destruction.

Claims

1, a kind of self-destruction syringe comprises core bar, overcoat, piston, needle tubing and sheath, and the front end of core bar is provided with piston, the core bar that contains piston places overcoat, needle tubing is fixedly installed on the front end of overcoat, and needle tubing is furnished with sheath, it is characterized in that: the inwall of overcoat is provided with the self-destruction boss one; Core bar with put self-destruction boss corresponding position outward and be provided with annular groove, be furnished with the retaining card in the annular groove, annular groove and be provided with fracture belt by the core bar between the hands, the core bar at fracture belt two ends connects by contact point.

2, self-destruction syringe according to claim 1 is characterized in that: the inwall of overcoat is provided with the rear portion that one self-destruction boss is positioned at overcoat, and the distance that piston nose is taken in fracture to is less than or equal to the actual grade in the overcoat.

3, self-destruction syringe according to claim 1 and 2, it is characterized in that: described retaining card is segmental flexure strip, segmental radius is greater than the radius of overcoat self-destruction boss place inner chamber, place the annular groove of the core bar bottom of packing into behind the outer suit to draw in and be coniform, cone shape awl bottom surface is to pressing hands.

4, self-destruction syringe according to claim 1 and 2 is characterized in that: the core bar at described fracture belt two ends connects by the contact point that is evenly distributed on the core bar periphery.

5, self-destruction syringe according to claim 4 is characterized in that: the core bar at described fracture belt two ends connects by 3～5 contact points that are evenly distributed on the core bar periphery.

6, self-destruction syringe according to claim 5 is characterized in that: the piston of core bar front end adopts rubber piston; Described is anti-skid structure by watch face, and described anti-skid structure is for pressing the equally distributed protruding weir of watch face or groove or salient point or pit.