CN201131993Y

CN201131993Y - Disposable self-breaking syringe

Info

Publication number: CN201131993Y
Application number: CNU2007201984179U
Authority: CN
Inventors: 张洪杰
Original assignee: Individual
Current assignee: Pepm Medical Technology Co Ltd
Priority date: 2007-11-27
Filing date: 2007-11-27
Publication date: 2008-10-15
Anticipated expiration: 2017-11-27

Abstract

The utility model discloses a disposable self-destruction injector, which is characterized in that a core rod inner hole is arranged at the central position of the end part of a core rod, a self-destruction cone is arranged in the core rod inner hole, a core rod air exhaust hole is arranged at the core rod wall of the core rod inner hole, the core rod inner hole is communicated with the core rod air exhaust hole, a positive stop hole is arranged at the lower part of the inner cavity of the tube neck of an outer sleeve, and a stop hole clipping ring is arranged at the hole at the lower part of the positive stop hole, the self-destruction cone at the core rod is utilized to destroy the sealing performance between the outer sleeve of the injector and the core rod in the disposable self-destruction injector, so that positive or negative pressure can not be generated in the outer sleeve, and the effect of complete self-destruction of the injector is achieved, a protective sheet is also arranged at the stiffener of the core rod, so that the self-destruction mechanism is prevented from being triggered due to the mis-operation of the core rod efficiently, to avoid discarding the injector. The disposable self-destruction injector has the advantages that the whole structure of the product is reasonable, the operation is flexible, one-hand operation can be realized completely, the product fully adopts plastic pieces, the assembly is convenient, and the fully-automatic production and assembly can be realized, so that the production output can be improved efficiently.

Description

A kind of disposable use self-destroyed syringe

Technical field:

This utility model relates to the technical field of medical device, a kind of specifically disposable use self-destroyed syringe, particularly its mechanical connecting structure.

Background technology:

At present, in order to prevent the propagation of blood class communicate illness, disposable syringe is extensive use of by hospital, and day use amount is very big, some illegal retailer illegally reclaims those used disposable syringes, repack utilization again through cleaning the back, bring great harm for patient and medical and nursing work person, so some country has begun to force to use self-destruction syringe.

Documents one: the patent No.: ZL03270980.3, patentee: Xinhua Medical Apparatus Co., Ltd. Shandong, publication number: CN2640490, this case discloses a kind of " Disposable, self-destroying syringe ", its principal claim content is: it comprises syringe needle, syringe, plug and core bar, wherein an end of syringe needle is fixed in the vertical reducing of syringe, the plug suit is fixed on the core bar, inner surface damping sealing with syringe, it is characterized in that: the inwall that syringe is positioned at opening is provided with a plurality of inclinations and whippy unidirectional catching, but the bayonet socket of using the condensation of formation elasticity or supporting is corresponding with it, and core bar is provided with the chuck of diameter greater than bayonet socket.

Documents two: the patent No.: ZL 200420051683.5, patentee: Ma Qinggang, publication number: CN2708921, this case discloses a kind of " disposable safety self-breaking injector ", its principal claim content is: comprise cylindrical shell, needle stand, push rod and piston, piston is positioned at the front end of push rod, it is characterized in that being connected by the locked joints that the center medicine liquid channel is arranged between cylindrical shell and needle stand, the front end center of locked joints is provided with needle stand, the outer surface of periphery shell is provided with propelling, the locking helicla flute, the barrel front end inwall is provided with helicla flute and cooperates corresponding interior projection, the center, rear end of locked joints is provided with concave station, the concave station wall is provided with screw stops, and the front end of push rod passes piston, with the concave station corresponding boss that matches, the boss perisporium is provided with and the screw stops corresponding outer projection that matches.

Existing disclosed Disposable, self-destroying syringe is of a great variety, complex structure, some can't realize full-automatic production and assembly, causes volume of production low, the production cost height, some die sinking difficulty is big, can't the demoulding, and also some result of use is poor, the medicinal liquid residual quantity is big, job stability is not good, takes place easily to cause the completely written-off accident of syringe because of maloperation, so still need prior art is further improved.

Summary of the invention:

The purpose of this utility model is to provide a kind of disposable use self-destroyed syringe; it is rational in infrastructure; product integral body is overall plastic materials and parts; die sinking is convenient in demoulding, and can realize full-automatic assembling, the medicinal liquid less residue produced; job stability is good; and added screening glass, and can effectively prevent syringe because of maloperation causes the completely written-off phenomenon of syringe, overcome all shortcomings that existing self-destruction syringe exists.

To achieve these goals, technical scheme of the present invention is: a kind of disposable use self-destroyed syringe, it mainly comprises overcoat, the tube neck end of overcoat is provided with external needle holder or built-in needle holder, external needle holder and built-in needle holder end are provided with needle tubing, be provided with core bar in the overcoat, the end of core bar is provided with plug, it is characterized in that: the center, end of described core bar is provided with the core bar endoporus, be provided with the self-destruction cone in the core bar endoporus, the core bar wall place at core bar endoporus place is provided with the core bar steam vent, and the core bar endoporus is connected with the core bar steam vent, outer sleeve neck inner chamber bottom is provided with spacing hole, and place, aperture, spacing hole bottom is provided with the spacing hole snap ring.

The utility model discloses a kind of disposable use self-destroyed syringe; it breaks through the design concept of existing self-destroyed syringe fully; utilize the self-destruction cone at core bar place; destroy the sealing between syringe jacket and the core bar; make in the overcoat and can't produce positive negative pressure; reach the effect of the complete self-destruction of syringe, and be provided with screening glass, can prevent effectively that core bar from triggering self-destructor because of maloperation at the reinforcement place of core bar; cause syringe to scrap; the product reasonable integral structure, flexible operation can be realized one-handed performance fully; product is overall plastic materials and parts; easy to assembly, can realize the fully-automatic production assembling, effectively improve output; and medicinal liquid less residue; it is leading domestic that product reaches, and international most advanced level has outstanding substantive distinguishing features and marked improvement compared to existing technologies.

Description of drawings:

Fig. 1 is this utility model first example structure sketch map.

State diagram when Fig. 2 finishes for this utility model first embodiment injection.

Fig. 3 is this utility model first embodiment self-destruction state diagram.

Fig. 4 is this utility model second example structure sketch map.

The specific embodiment:

With reference to the accompanying drawings, this utility model further is described

This utility model is a kind of disposable use self-destroyed syringe; as shown in fig. 1; it is this utility model first embodiment; it mainly comprises overcoat 1; the tube neck end of overcoat is provided with built-in needle holder 15; built-in needle holder 15 ends are provided with needle tubing 24; be provided with core bar 2 in the overcoat 1; the end of core bar 2 is provided with plug 10; it is characterized in that: the center, end of described core bar 2 is provided with core bar endoporus 9; be provided with self-destruction cone 17 in the core bar endoporus 9; the core bar wall place at core bar endoporus 9 places is provided with core bar steam vent 13; core bar endoporus 9 is connected with core bar steam vent 13; outer sleeve neck inner chamber bottom is provided with spacing hole 5; place, aperture, spacing hole 5 bottom is provided with spacing hole snap ring 6; self-destruction cone 17 bottoms are bar shape; the cylinder lower end is provided with card muscle 7; the card muscle can play fixation to the self-destruction cone; the approximate cone that is in self-destruction cone 17 tops; the top is provided with awl point 4; the cone place that bores sharp 4 bottoms is provided with grab 3; self-destruction cone 17 bottoms are bar shape; the cylinder place is socketed with band 8; band makes good sealing effectiveness between self-destruction cone and the core bar; be provided with core bar endoporus snap ring 14 in the core bar endoporus 9; snap ring can match with the card muscle; described plug 10 is annular; it is socketed on place, core bar 2 ends; be provided with plug sealing ring 11 between annular plug and the core bar outer wall; described core bar place vertically is provided with at least 4 reinforcements 18; wherein reinforcement 18 places laterally are provided with breach 19; indentation, there is provided with screening glass 12; fixedly connected with breach 19 tops in the upper end of described screening glass 12; screening glass 12 lower ends ask 20 upper surfaces to fixedly connected with the finger of core bar bottom; screening glass 12 outer surveys near center are provided with a step 21; screening glass is inboard to be provided with thin-walled breach 22 near center; the step place is provided with platform 23; platform protrudes in the jacket bottom opening; outer sleeve neck place can be provided with the external needle holder 16 of international standard in this utility model second embodiment, and external needle holder 16 ends are provided with needle tubing 24.

In this utility model first embodiment; press place, screening glass step bottom gently to the inside with finger; because screening glass itself is thinner; and the inboard adds the thin-walled breach herein; so flexural deformation to the inside especially easily; because the length of screening glass itself is greater than the vertical vertical height of breach; when so assembling is finished; screening glass is slightly outwardly-bent to arch upward; its step platform surface near center just in time props up jacket bottom; can prevent that core bar is subjected to displacement forward; it is stressed inwardly occur bending and deformation after; under the tension force effect of two ends; reach steady statue; this moment, the step at screening glass place also was subjected to displacement thereupon to the inside; separate with jacket bottom; this moment, core bar just can move forward; start injection; thumb withstands and refers to that holder promotes core bar forward; the vertical self-destruction cone of core bar is shifted forward with core bar; though the forward cone width of self-destruction cone is greater than the width of spacing hole snap ring; but because self-destruction cone front end is the cone that has the awl point; so only need just the self-destruction cone of core bar front end to be pushed in the spacing hole of outer sleeve neck inner chamber bottom with thrust less than 5 newton; because the cone place of the sharp bottom of awl is provided with grab; hook structure cooperates spacing hole snap ring structure; make that the self-destruction cone is difficult to extract again in entering spacing hole; this moment, injection was finished, and pulled back core bar, and self-destruction cone rear cylinder is stressed to break away from core bar; the core bar wall place at core bar endoporus place is provided with the core bar steam vent; the core bar endoporus is connected with the core bar steam vent, and this moment, plug did not form negative pressure to the overcoat inner chamber, and medicinal liquid when re-using (liquid) does not enter syringe; same reason; promote core bar and do not form malleation, do not carry out injection, syringe is realized the effect of complete self-destruction.

Claims

1, a kind of disposable use self-destroyed syringe, it mainly comprises overcoat (1), the tube neck end of overcoat is provided with external needle holder (16) or built-in needle holder (15), external needle holder (16) and built-in needle holder (15) end are provided with needle tubing (24), be provided with core bar (2) in the overcoat (1), the end of core bar (2) is provided with plug (10), it is characterized in that: the center, end of described core bar (2) is provided with core bar endoporus (9), be provided with self-destruction cone (17) in the core bar endoporus (9), the core bar wall place that core bar endoporus (9) is located is provided with core bar steam vent (13), core bar endoporus (9) is connected with core bar steam vent (13), outer sleeve neck inner chamber bottom is provided with spacing hole (5), and place, spacing hole (5) aperture, bottom is provided with spacing hole snap ring (6).

2, according to a kind of disposable use self-destroyed syringe described in the claim 1, it is characterized in that: self-destruction cone (17) bottom is a bar shape, the cylinder lower end is provided with card muscle (7), the approximate cone that is in self-destruction cone (17) top, the top is provided with awl point (4), and the cone place of awl point (4) bottom is provided with grab (3).

3, according to a kind of disposable use self-destroyed syringe described in the claim 1, it is characterized in that: self-destruction cone (17) bottom is a bar shape, and the cylinder place is socketed with band (8).

4, according to a kind of disposable use self-destroyed syringe described in the claim 1, it is characterized in that: be provided with core bar endoporus snap ring (14) in the core bar endoporus (9).

5, according to a kind of disposable use self-destroyed syringe described in the claim 2, it is characterized in that: described plug (10) is annular, and it is socketed on place, core bar (2) end, is provided with plug sealing ring (11) between annular plug and the core bar outer wall.

6, according to a kind of disposable use self-destroyed syringe described in the claim 1; it is characterized in that: described core bar place vertically is provided with at least 4 reinforcements (18); wherein a reinforcement (18) locates laterally to be provided with breach (19), and indentation, there is provided with screening glass (12).

7, according to a kind of disposable use self-destroyed syringe described in the claim 6; it is characterized in that: fixedly connected with breach (19) top in the upper end of described screening glass (12); fixedly connected with finger holder (20) upper surface of core bar bottom in screening glass (12) lower end; the outer survey near center of screening glass (12) is provided with a step (21); screening glass is inboard to be provided with thin-walled breach (22) near center; the step place is provided with platform (23), and platform protrudes in the jacket bottom opening.