CN2274968Y

CN2274968Y - Integrated disposable self destroyed injector after use

Info

Publication number: CN2274968Y
Application number: CN 96228409
Authority: CN
Inventors: 陈志贞; 潘红
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-25
Filing date: 1996-07-25
Publication date: 1998-02-25
Anticipated expiration: 2006-07-25

Abstract

The utility model relates to an integrated disposable injector self destroying after use, which is composed of an injection needle tube 2, a rubber piston 4, a puncture needle body 5, a jacket 6, a core bar 7, etc., wherein, the injection needle tube 2 is in adhesive joint in a bore of a conical point 3 at the front end of the jacket 6; the rubber piston 4 is arranged at the front end of the core bar 7, the front wall of the rubber piston forms a cone-angle shape, the center of the rubber piston forms an arc shape, and the puncture needle body 5 is hidden in the inner cavity of the rubber piston and a through hole 9 of the core bar 7; two opposite semicircular bosses 10 are arranged around the bore of the bottom closing conical point 3 of the jacket 6, and the tail of the core bar 7 forms a cylinder shape. The utility model has the advantages of novel structure, flexible operation, self destroy after use and stronger effect in stopping cross infections.

Description

Pin device one body disposable back self-destruction syringe

This utility model relates to a kind of syringe, particularly relates to a kind of disposable sterilized syringe.

Current domestic and international known disposable sterilized syringe all is split type, promptly with the supporting use of the entry needle of syringe and corresponding specification, thereby can not guarantee that on its structure entry needle and syringe can only use once, occur the secondary use again after having caused the particularly third world various countries that comprise China to use this syringe, caused the disease infection of unnecessary chain complexity to human society.In order to cut off the root of injection cross infection, the applicant on March 3rd, 1994 submit applications and the patent No. of having authorized be in 94225852.5 the utility model patent technology, a kind of pin device one body disposable back self-destruction syringe is provided, in implementing popularization and clinical use, this syringe has been obtained good social and economic benefit, has tentatively obtained the relevant expert's of China and foreign countries attention.Also expose simultaneously some ideal not to the utmost problem, for example (referring to accompanying drawing 3): the overall structure of (1) syringe core rod 7 is cross angle shapes, this is in hospital particularly under the situation of injection room continuous operation, and nursing staff's finger is subjected to the cutting of angle for a long time and susceptible is tired even cause finger to fray; (2) antetheca of syringe core rod 7 front end rubber pistons 4 is curved, and the back cover of syringe jacket 6 is taper, when syringe core rod 7 is shifted the back cover of syringe jacket 6 onto, the whole cambered top end of rubber piston 4 contacts with the taper back cover of syringe jacket 6, amount of contraction is little, and because of the antetheca of rubber stopper 4 too thick (being 0.8-1.2mm), cause needle body 5 to be difficult for penetrating rubber stopper 4, also residual a small amount of surplus liquid can not be discharged simultaneously.

The purpose of this utility model is: to above-mentioned technological deficiency, on the basis of No. 94225852.5 patented technologies, through partial architecture advances, provide a kind of structure more perfect, domestic and international unique " the pin device one body disposable back self-destruction syringe " that function is even more ideal.

The purpose of this utility model mainly is to realize by the end of the afterbody of the back cover of syringe jacket 6, syringe core rod 7 and rubber stopper 4 is carried out structural improvement respectively.

Accompanying drawing 1 is the package assembly sketch map of this utility model syringe;

Accompanying drawing 2 is core bar structure sketch maps of this utility model syringe;

Accompanying drawing 3 is that the patent No. is the package assembly sketch map of No. 94225852.5 syringes.

The utility model syringe is compared with No. 94225852.5 patented technologies, removes more Effectively improve the self-destruction performance, stop outside the cross-infection, and can have the following advantages: (1) has Effect ground solved the nursing staff when working continuously, and points because of the cutting that is subjected to for a long time angle and causes Sense of fatigue even the hardship that frays; (2) effectively improve the puncture resistance of rubber piston 4 antethecas; (3) effectively eliminate residual between syringe jacket 6 back cover cone angles and rubber piston 4 antethecas Surplus liquid. In a word, through the utility model syringe after improving, it is completeer to have reached structure fully Kind, function is purpose more preferably.

Following with reference to accompanying drawing 1, the concrete structure of this utility model syringe is described in detail.

As shown in Figure 1, this utility model syringe is made up of protective sleeve 1, injection needle 2, rubber piston 4, puncture needle body 5, syringe jacket 6 and syringe core rod 7 etc., wherein:

1, protective sleeve 1 is attached to the outside of injection needle 2, is not touched wound in order to protection needle tubing 2;

2, injection needle 2 directly is bonded in the endoporus of syringe jacket 6 front end coneheads 3, makes injection needle 2 and syringe jacket 6 constitute the structure of one each other;

3, at rubber piston 4 of the end of syringe core rod 7 suit, there is an inner chamber at the center of piston 4, and antetheca is taper angle shape, and the antetheca center is circular arc, and according to the different size of syringe, cone angle can be controlled in 110 °-120 ° optimum range; The height of rubber piston 4 is controlled at the optimum range of 9.5mm-12.5mm; The antetheca center thickness is controlled at the optimum range of 0.5mm-0.8mm.

4, the front end at syringe core rod 7 has a through hole 9, keep a puncture needle body 5 that puts the first edge on a knife or a pair of scissors in the through hole 9, the afterbody of needle body 5 directly is against the bottom of through hole 9, and the front end of needle body 5 is ensconced the inner chamber of rubber piston 4, and its end then slightly contacts with rubber piston 4 front wall inner surface centers.

5, syringe jacket 6 back cover cone head holes 3 around, two relative half dollar shape convexes 10 are arranged, the diameter 5mm (external diameter) of convex, the high 2.8-3mm of platform, the optimum wall thickness of overcoat 6 is controlled between the 0.60-0.65mm.

6, the afterbody of syringe core rod 7 is cylindrical shape, this cylinder be circular arc by the best connected mode of hands 8.

This utility model syringe realizes that the principle of self-destroying function is: when the datum line of shifting rubber piston 4 onto when syringe core rod 7 overlaps with the zero line of overcoat 6, two semicircle convexes 10 of syringe jacket 6 back covers, force the antetheca of rubber piston 4 to shrink, at this moment the puncture needle body 5 that is positioned at rubber piston 4 inner chambers punctures rubber piston 4 antetheca centers and exposes needle body, makes that this syringe is destroyed to be scrapped.If reuse, because of the syringe inner chamber enters air by puncture needle body 5 medicinal liquid is taken out to enter, thereby can not be reused.Caused pin device one body disposable can only use once from structure with the back self-destruction syringe.

Claims

1, a kind of pin device one body disposable back self-destruction syringe, form by protective sleeve (1), injection needle (2), rubber piston (4), puncture needle body (5), syringe jacket (6) and syringe core rod (7) etc., wherein: protective sleeve (1) is attached to the outside of injection needle (2), and injection needle (2) directly sticks in the endoporus of syringe jacket (6) front end conehead (3); The optimum wall thickness of syringe jacket (6) is controlled between the 0.60-0.65mm; The front end of syringe core rod (7) has a through hole (9), at through hole (9) be sleeved in the inner chamber of rubber piston (4) of core bar (7) end, keeps a puncture needle body (5) that puts the first edge on a knife or a pair of scissors; This syringe is characterised in that:

1. around the endoporus of syringe jacket (6) back cover conehead (3), two relative semicircle convexes (10) are arranged;

2. the afterbody of syringe core rod (7) is cylindrical shape, this cylinder be circular-arc by the best connected mode of hands (8);

3. there is an inner chamber at the center of rubber piston (4), and antetheca is the cone angle shape, and antetheca central authorities are circular arc, and according to the different size of syringe, the antetheca cone angle of rubber piston (4) can be controlled in 110 °-120 ° optimum range; The height of rubber piston (4) is controlled at the optimum range of 9.5mm-12.5mm; Antetheca center of arc THICKNESS CONTROL is at the optimum range of 0.5mm-0.8mm.

2, according to the described syringe of claim 1, it is characterized in that endoporus two semicircle convexes (10) on every side of syringe jacket (6) back cover conehead (3), its diameter is 5mm, highly is 2.8mm-3mm.