CN201399137Y

CN201399137Y - Self-destruction syringe

Info

Publication number: CN201399137Y
Application number: CN2009200899958U
Authority: CN
Inventors: 邹纯平
Original assignee: SHUGUANG MEDICAL INSTRUMENT CO Ltd
Current assignee: Henan Shuguang qualied Kang biological Polytron Technologies Inc
Priority date: 2009-05-04
Filing date: 2009-05-04
Publication date: 2010-02-10
Anticipated expiration: 2019-05-04

Abstract

The utility model discloses a self-destruction syringe comprising an entry needle, an outer cylinder, a rubber stopper and a mandrel. The rubber stopper is mounted on the mandrel, a button is arrangedat the tail end of the mandrel, and a turned edge is arranged at the tail end of the outer cylinder. The utility model is characterized in that a boss is arranged inside the outer cylinder, a lockingpart which can be locked with the boss is arranged at the head part of the mandrel and above the rubber stopper, a weak area broken off easily is arranged on the mandrel, and a limiting sheet is arranged on the mandrel above the button. In the self-destruction syringe, the locking part on the mandrel and the boss in the outer cylinder are locked after the injection, and the weak area broken off easily is arranged on the mandrel, so that the mandrel is broken off when being pulled back, the rubber stopper and the front part of the mandrel are broken in the outer cylinder, the syringe is unableto be used again, the destruction process is automatically finished along with the injection process, and the operation is convenient.

Description

Self-destruction syringe

Technical field

This utility model belongs to syringe, relate in particular to a kind of can only disposable self-destruction syringe.

Background technology

Along with promoting the popularization use of disposable use medical supplies, disposable sterilized syringe particularly, in its use and processing procedure subsequently, owing to need artificially it to be carried out conscious processing, be repeatedly used thereby can exist inevitably, can't really realize disposable purpose.In order to overcome the above problems, applied in the self-destruction syringe of patent at present, having adopt to increase metal spring sheet or other auxiliary accessories, can only can not adopt automatization's assembling by artificial assembling, thereby speed of production is slow, and because of increasing auxiliary accessories, production cost is also just high, therefore, should make the syringe damage, can large-scale production reduction manufacturing cost become a great problem again simultaneously.

The utility model content

The purpose of this utility model is to provide a kind of self-destruction syringe, can be in the free damage in back of finishing using, thus really accomplish disposable use, and it is easy to operate.

For achieving the above object, this utility model adopts following technical scheme: a kind of self-destruction syringe, be made up of entry needle, urceolus, plug and core bar, plug is contained on the core bar, and the end of core bar is pressed hands, the end of urceolus is provided with a crimping, it is characterized in that: there is a boss inside of urceolus, the head of core bar have can be sealed with this boss locking part, locking part is positioned at the top of plug, on core bar, also have the weak area of frangibility, on by square on hand core bar, banking stop is arranged.

Described boss is rounded, and described locking part is umbrella shape flexure strip or frustum.

Entry needle comprises needle stand and the needle tubing that is contained on the needle stand, and the needle stand rear portion is a cone, on the outer wall of cone middle part external ear is arranged, and there is the thread groove that cooperates with external ear the anterior inboard of urceolus, and the outer tube inner wall at the rear portion of thread groove is tapered.

Entry needle also comprises needle shield, and needle shield is contained on the needle stand.

On the urceolus inner wall at end, be provided with spacing preiection.

On the urceolus inner wall at end, be provided with embedded spacing collar.

One baffle plate is arranged on core bar, and plug is between locking part and baffle plate.

One position limiting convex ring is arranged on the core bar between locking part and the baffle plate, and plug is enclosed within on the position limiting convex ring.

The weak area of the frangibility on the core bar is positioned at the baffle plate below, perhaps between locking part and baffle plate.

Described banking stop is plate shaped, perhaps is elastic pressuring plate.

Adopt the self-destruction syringe of technique scheme, locking part and the boss in the urceolus on injection finishes the back core bar are sealed, and the weak area of frangibility is arranged on the core bar, when pulling back core bar, core bar disconnects at groove, broken in plug and core bar front portion syringe can't be reused, whole damage process is along with injection process is finished automatically, and is easy to operate.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the view behind the extraction medicinal liquid;

Fig. 3 is for having injected the view behind the medicinal liquid;

Fig. 4 is the view that pumps off core bar.

The specific embodiment

Self-destruction syringe as Fig. 1, comprise entry needle, urceolus 2, plug 3 and core bar 4, the end of core bar 4 is pressed hands 4-3, the end of urceolus 2 is provided with a crimping 2-4, there is a round boss 2-2 inside of urceolus 2, the head of core bar 4 have can be sealed with this boss locking part 4-1, locking part 4-1 is positioned at the top of plug 3, locking part is umbrella shape flexure strip or frustum.Plug 3 front end centers are provided with a hole, are convenient to locking part and pass through.One baffle plate 4-6 is arranged on core bar 4, a position limiting convex ring 4-5 is arranged on the core bar between locking part 4-1 and the baffle plate 4-6, plug 3 is enclosed within on the position limiting convex ring 4-5, can prevent the plug slippage.On the core bar below the plug 3, also have the weak area 4-4 of frangibility, on by the core bar above the hands 4-3, plate shaped banking stop 4-2 is arranged.On the urceolus inner wall at end, be provided with annular stop projection 2-3, plug extracted from urceolus extracting the medicinal liquid mistiming preventing.

Entry needle is made up of needle shield 1-1, needle stand 1-3 and the needle tubing 1-2 that is contained on the needle stand, and there is a fluid passage needle stand inside.The needle stand rear portion is cone 1-4, on the outer wall of cone middle part external ear 1-5 is arranged, and there is the thread groove 2-1 that cooperates with external ear the anterior inboard of urceolus 2, and the outer tube inner wall at thread groove rear portion also has certain taper.Like this, when needle stand because of being subjected to torsion along with its external ear during at the thread groove internal rotation, the cone at needle stand rear portion and urceolus conical inboard wall interference fit, along with the extruding forward of needle stand, its faying face is tight more, thereby reaches sealing property.

Spacing preiection 2-3 on the urceolus inner wall at end also can be replaced by embedded spacing collar, perhaps increases an embedded spacing collar when keeping spacing preiection.The forward thread groove 2-1 of urceolus also can replace with draw-in groove.Locking part 4-1 also can be a frustum.The weak area of the frangibility on the core bar also can be between locking part and baffle plate.

This utility model when assembling, entry needle inserted the urceolus thread groove and screw, plug is wrapped up on the position limiting convex ring that is placed in core bar locking part rear portion and is fixed to the plate washer front portion, thereupon will the core bar insertion urceolus of band plug in.

When this utility model uses, break banking stop 4-2 earlier off with the fingers and thumb, as shown in Figure 2, just can use this syringe routinely.In injection process, its preceding process and conventional injection indistinction when only injection finishes nearly, because latch-up structure is sealed, have a slightly response, represent that promptly both are locked, and as shown in Figure 3, syringe is just by sealed and can't reuse.When reusing this syringe and will pull back the core bar drawing liquid, core bar 4 can be broken from the weak area 4-4 of frangibility, as shown in Figure 4, thereby makes plug and core bar front portion still stay the bottom of urceolus and can't reuse.

Banking stop on the core bar can be plate shaped shown in Fig. 1, also can replace with elastic pressuring plate, in use, only needs elastic pressuring plate is inwardly pushed, and elastic pressuring plate is snapped in the core bar, can use syringe routinely.

Urceolus of the present utility model, core bar and needle stand all can be satisfied the needs of large-scale production, thereby be reduced production costs by injection molding.

Claims

1, a kind of self-destruction syringe, form by entry needle, urceolus, plug and core bar, plug is contained on the core bar, the end of core bar is pressed hands, and the end of urceolus is provided with a crimping, it is characterized in that: there is a boss inside of urceolus, the head of core bar have can be sealed with this boss locking part, locking part is positioned at the top of plug, also has the weak area of frangibility on core bar, on by square on hand core bar banking stop is arranged.

2, self-destruction syringe as claimed in claim 1 is characterized in that: described boss is rounded, and described locking part is umbrella shape flexure strip or frustum.

3, self-destruction syringe as claimed in claim 1, it is characterized in that: entry needle comprises needle stand and the needle tubing that is contained on the needle stand, and the needle stand rear portion is a cone, on the outer wall of cone middle part external ear is arranged, there is the thread groove that cooperates with external ear the anterior inboard of urceolus, and the outer tube inner wall at the rear portion of thread groove is tapered.

4, self-destruction syringe as claimed in claim 3 is characterized in that: entry needle also comprises needle shield, and needle shield is contained on the needle stand.

5, as claim 1,2,3 or 4 described self-destruction syringes, it is characterized in that: on the urceolus inner wall at end, be provided with spacing preiection.

6, as claim 1,2,3 or 4 described self-destruction syringes, it is characterized in that: on the urceolus inner wall at end, be provided with embedded spacing collar.

7, self-destruction syringe as claimed in claim 1 is characterized in that: a baffle plate is arranged on core bar, and plug is between locking part and baffle plate.

8, self-destruction syringe as claimed in claim 7 is characterized in that: a position limiting convex ring is arranged on the core bar between locking part and the baffle plate, and plug is enclosed within on the position limiting convex ring.

9, as claim 7 or 8 described self-destruction syringes, it is characterized in that: the weak area of the frangibility on the core bar is positioned at the baffle plate below, perhaps between locking part and baffle plate.

10, self-destruction syringe as claimed in claim 1 is characterized in that: described banking stop is plate shaped, perhaps is elastic pressuring plate.