CN102397606A

CN102397606A - Self-destroying injector with retaining device

Info

Publication number: CN102397606A
Application number: CN2010102904430A
Authority: CN
Inventors: 冯忠; 徐萍; 缪李平
Original assignee: WUXI YUSHOU MEDICAL APPLIANCES CO Ltd
Current assignee: WUXI YUSHOU MEDICAL APPLIANCES CO Ltd
Priority date: 2010-09-16
Filing date: 2010-09-16
Publication date: 2012-04-04

Abstract

The invention discloses a self-destroying injector with a retaining device, and aims to provide an injector which has low die manufacturing cost and is easy to produce. A jacket die is completely the same as an ordinary conventional jacket, and the self-destroying injector with the retaining device can be produced by an injector manufacturer by slightly modifying the conventional mandrel die. The self-destroying injector comprises a jacket part, wherein the back end face of the jacket is provided with a jacket turned edge; a jacket wall close to the jacket turned edge is provided with an elastic retaining sheet; the retaining sheet inclines towards the inside of the jacket; a mandrel is provided with a retaining ring and a pressing handle; and the retaining ring can move smoothly in a jacket cavity. During the injection of a medicinal liquid, the elastic retaining sheet on the jacket is stressed and deformed when the retaining ring passes through the elastic retaining sheet on the jacket, the retaining ring on the mandrel smoothly and stably passes through the elastic retaining sheet on the jacket, the retaining ring on the mandrel is clamped by the retaining sheet on the jacket once the retaining ring passes through the elastic retaining sheet, so that liquid cannot be extracted outwards any more, and the self-destroying performance takes effect.

Description

A kind of self-destruction syringe with stopping device

Technical field

The present invention relates to a kind of self-destruction syringe, belong to medical supplies with stopping device.

Background technology

At present, international, domestic for preventing the cross infection of iatrogenic disease, begin requirement and used self-destruction syringe, guarantee that from structure syringe is only once used, finishing using is self-destruction, prevents that the user of service from reusing consciously once more.The World Health Organization (WHO), global United Nations Children's Fund regulation began to purchase self-destroyed syringe in 2003, substituted ordinary syringe.The appearance of existing many type self-destroyed patents in recent years, enterprise of large group of global a few family is producing simultaneously, carries out the whole world and promotes.China has enterprise of a few family to begin to produce self-destruction syringe too, and self-destruction syringe especially at first obtains using in disadvantaged country and developing country.Like several states in Africa; The use of self-destruction syringe is stood into state's laws; The same government of India and China is also in the use of promoting self-destruction syringe, and the period of the alternative ordinary syringe of self-destruction syringe is coming, so the appearance of many patents and manufacturing enterprise is inevitable.But disposable syringe is big at the consumption in the whole world; The cheap of its manufacturing cost conveniently is crucial with what use, and the self-destruction syringe that occurs on many patents and the market has has increased parts, and increasing parts one is to have strengthened manufacturing cost; Wasted resource; Also improve energy consumption, be not suitable for the low-carbon (LC) requirement, also improved price simultaneously.Patent design improvement in addition on syringe jacket, core bar is also arranged, but that mould and die accuracy requires is high, die manufacturing cost is big; Be to guarantee the product precision, the adjustment mould and die accuracy occurs often repairing, injection mold on the injection machine of being everlasting up and down keep in repair adjustment; Improved energy resource consumption; Also improved cost and price simultaneously, mould cheap for manufacturing cost be suitable for low cost, be prone to produce, mould chronically can steady production simultaneously; Can fall can, subtract consumption, at a low price competitive self-destruction syringe is and potentiality, needs further improvement.

For solving above deficiency, the present invention provides a kind of die manufacturing cost low, and overcoat and existing disposable syringe mould are identical, easy to operate a kind of self-destruction syringe with stopping device.Disposable syringe manufacturer few modifications on existing core bar mould can be used; The existing syringe production unit of China has family more than 300, about 10,000,000,000 of syringe production, and the mould total amount is no less than 5000 covers; If can improve use; Can reduce by 300,000,000 yuans input and can carry out the replacement of China's self-destruction syringe, play simultaneously and subtract the effect that can lower consumption, be suitable for the requirement of the low carbon emission reduction of China.

Summary of the invention

The object of the present invention is to provide a kind of mould simple and easy; Low cost of manufacture is fallen simultaneously and can be lowered consumption, the self-destruction syringe of band stopping device after cheap a kind of injection finishes; More particularly when injecting liquid drug or the injection back syringe self-destruction performance that finishes come into force not reproducible being utilized.

The objective of the invention is to realize like this, it comprises: overcoat 1, core bar 2, piston 3;

It is characterized in that:

Described overcoat 1 rear end face place is provided with overcoat crimping 6; Be provided with elasticity retaining sheet 4 near overcoat crimping place overcoat wall, retaining sheet is to the mantle cavity tilt, a conicle post 8 arranged and perpendicular to the overcoat crimping on the rightabout central axis of its external sleeve crimping; The conicle post also can the off-center axis; And perpendicular to the overcoat crimping, i.e. hair style partially, needle point can directly be bonded on the conicle post of overcoat and be with sheath simultaneously.

It is characterized in that:

Described core bar 2 is provided with stopping ring 5 and presses hands 7; The core bar that has sealing-plug is positioned at described overcoat inner chamber together; The outside dimension of described stopping ring and the inner cavity size of overcoat are complementary; Can not too small stopping ring, its external sleeve inner chamber moves smoothly, and stopping ring 5 can be blocked by elasticity retaining sheet 4 when injecting liquid drug finished the pumpback core bar.

It is characterized in that:

Described sealing-plug is assemblied in and is positioned at described overcoat on the core bar together, its sealing-plug also can be directly and core bar be injection-moulded in one.

The present invention compared with prior art, die manufacturing cost is low, existing manufacturer promptly can utilize in core bar mould few modifications, is prone to produce, and is suitable for the requirement of existing social low-carbon (LC), and great competitiveness is arranged.

Description of drawings

Fig. 1 is overall structure figure of the present invention;

Fig. 2 A is the cut-away view of overcoat;

Fig. 2 B is the left view of Fig. 2 A end portion face;

Fig. 3 A is the core bar sketch map;

Fig. 3 B is the axonometric chart of core bar;

Fig. 4 is the sketch map of whole use, is A, B, 3 components of C, and the A component is for before using, and the B component is in using, and the C component is for after using;

Fig. 5 is the overcoat sketch map of other pattern, is A, 2 components of B;

Fig. 6 is the direct and core bar injection moulding all-in-one-piece sketch map of sealing-plug;

Fig. 7 directly is bonded in overcoat conicle post for needle point and is with the sketch map of sheath;

Among the figure 1, overcoat, 2., core bar, 3, sealing-plug, 4, the elasticity retaining sheet, 5, the stopping ring, 6, the overcoat crimping, 7, press hands, 8, the conicle post, 9, locked joints, 10, needle point, 11, sheath.

The specific embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is described further, referring to accompanying drawing.

A kind of self-destruction syringe with stopping device of the present invention comprises overcoat 1, core bar 2, sealing-plug 3, and it is provided with elasticity retaining sheet 4, overcoat crimping 6 on the coat, and the rightabout of its external sleeve crimping 6 is provided with conicle post 8, sees Fig. 2; Core bar 2 is provided with stopping ring 5, presses hands 7, sees Fig. 3; The core bar that has sealing-plug is installed in the mantle cavity together, and during installation, stopping ring 5 should place between the overcoat crimping 6 and elasticity retaining sheet 4 of overcoat; Stopping ring 5 can not get into elasticity retaining sheet 4, sees Fig. 4 A, in case get into; Syringe self-destruction performance comes into force; Because core bar is drawing liquid again, the retaining sheet 4 that the stopping ring 5 on the core bar is put outward blocks, and sees Fig. 4 C.

Need to prove that this invention product can cooperate suitable entry needle to carry out drawing liquid and injection.

Operate as follows: require rightabout pulling or extraction medicinal liquid during pulling core bar 2, see Fig. 4 B, carry out injecting liquid drug by normal running then to conicle post 8; The elasticity retaining sheet of stopping ring during injection on the core bar through putting outward because retaining sheet is elastic, has certain pressure when adding liquid medicine injection; So during the elasticity retaining sheet of the stopping ring on the core bar through putting outward, elasticity retaining sheet stress deformation, core bar stopping ring i.e. elasticity retaining sheet through putting outward stably smoothly; Self-destruction this moment performance comes into force; Because when pulling back again, stopping ring 5 is blocked by the retaining sheet on the core bar, and in injection process, injecting stably is this key technology.If any acceleration or the patient of high pressure increase suddenly pain, this technology has solved the deficiency of many self-destruction syringes.

Claims

1. self-destruction syringe with stopping device, it comprises:

The overcoat part, described overcoat rear end face place is provided with the overcoat crimping, is provided with the elasticity retaining sheet near overcoat crimping place overcoat wall, and retaining sheet is to the mantle cavity tilt;

The core bar part, described core bar is positioned at said overcoat;

Sealing-plug, described sealing-plug are assemblied in and are positioned at described overcoat on the core bar together;

It is characterized in that: described core bar is provided with the stopping ring and presses hands, and the outside dimension of stopping ring and overcoat inner cavity size are complementary, and stopping ring its external sleeve inner chamber smoothly moves.

2. a kind of self-destruction syringe with stopping device according to claim 1 is characterized in that: when the core bar that has a sealing-plug was positioned at the overcoat inner chamber, its stopping ring should place between the overcoat crimping and retaining sheet of overcoat.