CN103721325A

CN103721325A - Automatic retractable safe syringe

Info

Publication number: CN103721325A
Application number: CN201410013439.8A
Authority: CN
Inventors: 罗绍基; 张卓旋; 张江生
Original assignee: GUANGDONG HAIOU MEDICAL APPARATUS STOCK CO Ltd
Current assignee: GUANGDONG HAIOU MEDICAL APPARATUS STOCK CO Ltd
Priority date: 2014-01-12
Filing date: 2014-01-12
Publication date: 2014-04-16
Anticipated expiration: 2034-01-12
Also published as: CN103721325B

Abstract

The invention relates to an automatic retractable safe syringe which comprises a core rod assembly and an outer sleeve assembly. The core rod assembly is composed of a core rod, a rubber plug, a spring and a spring base. A clamping protruding portion is arranged on the upper end of the spring base. The outer sleeve assembly comprises an outer sleeve, a needle base, an injection needle, a pull-back element and a valve ring, a pair of buckling claws is arranged on the lower portion of the valve ring and is buckled at the lower end of the pull-back element, and a locking buckle annular concave cavity matched with the clamping protruding portion in a buckling mode is disposed on the lower portion of the pull-back element. After medicine liquid injection, the buckling claws are expanded through the clamping protruding portion at the upper end of the spring base, the clamping protruding portion is inserted into the locking buckle annular concave cavity in the lower portion of the pull-back element, the spring base and the pull-back element are connected as a whole to continue to push the core rod until the spring base is pushed and disengages, and the pull-back element retracts to the inner cavity of the core rod under the action of spring force. At the time, the syringe is decomposed and can not be repeatedly used, injection needles making contact with medicine liquid and patients are all stored in a cylinder of the core rod, and the aims of self-destruction and safety are achieved.

Description

Automatic retracted safe syringe

Technical field

The present invention relates to a kind of medical apparatus and instruments, especially a kind of disposable automatic type syringe.

Background technology

Disposable automatic retracted safe syringe is by the needle automatic retracting program of pulling back on part; the pathophoresis of having avoided syringe Reusability on the one hand and cause; change on the one hand in addition the form of the artificial self-destruction of conventional security formula syringe; a kind of safer form is also provided, has protected medical personnel to avoid being injected pin and scratched or stab.

Current disposible safety syringe, what conventionally adopt is to have injected rear both hands to retract needle stand in overcoat, this structure easily produces maloperation, if promote core bar entry needle, also can again be released.This has caused a large amount of safety types dangerous.

Summary of the invention

The object of the invention is in order to overcome the deficiencies in the prior art, a kind of automatic injector is provided, it simple in structure, can not be excited because of maloperation, in whole process, do not need both hands to start self-destruction program, syringe needle is effectively isolated, simultaneously, the part of its contact medicine is few, thereby has reduced the contaminated probability of medicine.

The present invention, comprise core bar assembly and overcoat assembly, described core bar assembly is by core bar, plug, spring and spring base composition, described core bar is hollow tubular structure, lower end is provided with core bar bonnet button bit, top is provided with undergauge pipeline section, at undergauge pipeline section and upper end overcoat, there is plug, in core bar inner upper, is furnished with spring base, in the middle and upper part of spring base, be provided with the first bulge loop and the second bulge loop, the first bulge loop is fastened in the upper port of hollow tubular structural core bar, the endoporus of the second bulge loop and core bar undergauge pipeline section is sealed and matched, described spring-compressed is set between the lower convex ring and core bar undergauge pipeline section of spring base, in the upper end of spring base, be provided with card convex portion, described overcoat assembly is comprised of overcoat, needle stand, entry needle, pull back part and valve circle, entry needle sealing is fixed on the middle and upper part of the part of pulling back, in needle stand, be provided with logical core hole, logical core hole comprises aperture section and macropore section, and the part of pulling back is built in the logical core hole of needle stand and coordinates with logical core hole is moving, the top of valve circle is cylindrical structure, the macropore section tight fit of its periphery wall and needle stand bottom, the endoporus of valve circle moves and coordinates with the periphery wall of the part of pulling back, in the bottom of valve circle, be provided with a make-up pawl, button pawl is buckled in the lower end of the part of pulling back, in the bottom of pulling back part, be provided with the snap close ring cavity being clasped with described card convex portion, connect the lower surface of the part of pulling back below described snap close ring cavity, being communicated with entry needle above of snap close ring cavity.

The present invention, at the periphery wall of described needle stand, is provided with the first bulge loop and the second bulge loop, and spacing cooperation of upper surface of described the second bulge loop and overcoat, the interior scrobicular ring buckle on described the first bulge loop and overcoat top is sealed and matched.

The present invention, described in the part of pulling back comprise path section and large footpath section, the moving cooperation of aperture section of path section and needle stand, the large footpath section diameter of the part of pulling back is greater than the diameter of needle stand aperture section, the large footpath section of the part of pulling back is moved and is coordinated with the endoporus of valve circle.

The present invention, in the bottom of described valve circle, is provided with a pair of hole enlargement arc section, and hole enlargement arc section and the alternate setting of described button pawl, in the upper inside wall of described overcoat, be provided with necking down level rank, and described hole enlargement arc section is buckled on necking down level rank.

The present invention, safer than prior art, syringe is not easy to be excited in advance and starts self-destruction program.Syringe products accessory structure is simpler, and production is more prone to, and product accessories adopts the form of direct demold, is difficult for producing the injection defects such as burr, overlap, has effectively reduced the impact of working of plastics on medicinal liquid.

Accompanying drawing explanation

Fig. 1 is the integrally-built principle cutaway view of embodiment; Fig. 2 is the structural principle cutaway view of core bar assembly; Fig. 3 is the structural principle cutaway view of overcoat assembly; Fig. 4 is the structure cutaway view of core bar; Fig. 5 is the structural front view of spring; Fig. 6 is the structure cutaway view of plug; Fig. 7 is the structure cutaway view of spring base; Fig. 8 is the structure cutaway view of overcoat; Fig. 9-1-Fig. 9-4 are the structure chart of switch valve circle; Figure 10 is the structure cutaway view of needle stand; Figure 11 is the structure cutaway view of part and entry needle of pulling back; Figure 12 is state cutaway view before the present embodiment is used; Figure 13 is state cutaway view during the present embodiment is used; Figure 14 is the state cutaway view that the present embodiment has been injected rear self-destruction and open valve circle; Figure 15 be the present embodiment when having injected rear syringe and having extracted human body core bar pushed away forward the state cutaway view of automatic retracted.

In figure, 1, overcoat 2, core bar 3, core bar bonnet button bit 4, overcoat interior spacing 5, spring base 6, spring 7, spring base the first bulge loop 8, spring base card convex portion 9, valve circle 10, needle stand 11, entry needle 12, the part 13 of pulling back, snap close ring cavity 14, plug 15, core bar upper port 16, spring base the second bulge loop 17, overcoat needle stand button bit 18, needle stand the first bulge loop 19, button pawl 20, spring base is opened valve circle position 21, undergauge pipeline section 22, needle stand the second bulge loop 23, lower convex ring 24, aperture section 25, macropore section 26, path section 27, large footpath section 28, necking down level rank 29, hole enlargement arc section.

The specific embodiment

With reference to accompanying drawing, a kind of automatic retracted safe syringe, comprises core bar assembly and overcoat assembly.Described core bar assembly is by core bar 2, plug 14, spring 6 and spring base 5 form, described core bar 2 is hollow tubular structure, lower end is provided with core bar bonnet button bit 3, top is provided with undergauge pipeline section 21, at undergauge pipeline section 21 and upper end overcoat, there is plug 14, in core bar 2 inner upper, is furnished with spring base 5, the middle and upper part of spring base 5 is provided with the first bulge loop 7 and the second bulge loop 16, the first bulge loop 7 is fastened in the upper port 15 of hollow tubular structural core bar 2, the second bulge loop 16 is sealed and matched with the endoporus of core bar undergauge pipeline section 21, described spring 6 wedging rings are located between the lower convex ring 23 and core bar 2 undergauge pipeline sections 21 of spring base 5, in the upper end of spring base 5, be provided with card convex portion 8, described overcoat assembly is comprised of overcoat 1, needle stand 10, entry needle 11, pull back part 12 and valve circle 9, entry needle 11 sealings are fixed on the middle and upper part of the part 12 of pulling back, in needle stand 10, be provided with logical core hole, logical core hole comprises aperture section 24 and macropore section 25, and the part 12 of pulling back is built in the logical core hole of needle stand 10 and coordinates with logical core hole is moving, the top of valve circle 9 is cylindrical structure, macropore section 25 tight fits of its periphery wall and needle stand 10 bottoms, the endoporus of valve circle 9 moves and coordinates with the periphery wall of the part 12 of pulling back, in the bottom of valve circle 9, be provided with a make-up pawl 19, button pawl 19 is buckled in the lower end of the part 12 of pulling back, in the bottom of pulling back part 12, be provided with the snap close ring cavity 13 being clasped with described card convex portion 8, connect the lower surface of the part 12 of pulling back below described snap close ring cavity 13, being communicated with entry needle 11 above of snap close ring cavity 13.At the periphery wall of described needle stand 10, be provided with the first bulge loop 18 and the second bulge loop 22, the spacing cooperation of upper surface of described the second bulge loop 22 and overcoat 1, described the first bulge loop 18 is sealed and matched with interior scrobicular ring 17 buckles on overcoat 1 top.The described part 12 of pulling back comprises path section 26 and large footpath section 27, and path section 26 is moved and coordinated with the aperture section 24 of needle stand, and large footpath section 27 diameters of the part 12 of pulling back are greater than the diameter of needle stand aperture section 24, and the large footpath section 27 of the part 12 of pulling back coordinates with the endoporus of valve circle 9 is moving.In the bottom of described valve circle 9, be provided with a pair of hole enlargement arc section 29, hole enlargement arc section 29 and the alternate setting of described button pawl 19, in the upper inside wall of described overcoat 1, be provided with necking down level rank 28, and described hole enlargement arc section 29 is buckled on necking down level rank 28.

Its assemble sequence is: (1) overcoat general assembly: the part 12 of pulling back packs in switch valve circle 9, then is packed into the logical core hole of needle stand 10, is then pressed into overcoat head; (2) core bar general assembly: spring base 5 packs in spring 6, then put it in core bar 2, is pressed into by frock, and the first bulge loop 7 of spring base 5 is stuck in the upper port 15 of core bar 2, then packs plug 14 into; (3) pack core bar assembly into overcoat assembly.

Its using method and operation principle are as follows:, with reference to Figure 12, when clinical use, unpack (1), take out syringe, and (2), with reference to Figure 13, the using method of syringe extracts medicinal liquid routinely, and also the using method of syringe is carried out injecting liquid drug routinely, (3), with reference to Figure 14, after liquid medicine injection finishes, the card convex portion 8 of spring base 5 upper ends struts button pawl 19 and inserts in the snap close ring cavity 13 of part 12 bottoms of pulling back, and drains medicinal liquid, now, can extract syringe, (4) with reference to Figure 15, extract after syringe, continue to promote core bar 2, plug 14 is compressed, the card convex portion 8 of spring base 5 upper ends is withstood can not continue to move up, now, spring base 5 can only move to the inner chamber of core bar 2, until departing from the upper port 15 of core bar 2, the first bulge loop 7 of spring base 5 enters in the chamber cylinder of core bar 2, now, spring base 5 is de-by top, pull back part 12 under the effect of spring force and be set back in the inner chamber of core bar 2, core bar 2 is also pushed into the inside at overcoat 1, now, syringe disintegrates and cannot reuse, the entry needle 11 of crossing with medicinal liquid and contact patients is all stored in the cylinder of core bar 2, reach self-destruction, the object of safety.

Claims

1. an automatic retracted safe syringe, comprise core bar assembly and overcoat assembly, it is characterized in that: described core bar assembly is by core bar (2), plug (14), spring (6) and spring base (5) composition, described core bar (2) is hollow tubular structure, lower end is provided with core bar bonnet button bit (3), top is provided with undergauge pipeline section (21), at undergauge pipeline section (21) and upper end overcoat, there is plug (14), in core bar (2) inner upper, is furnished with spring base (5), in the middle and upper part of spring base (5), be provided with the first bulge loop (7) and the second bulge loop (16), the first bulge loop (7) is fastened in the upper port (15) of hollow tubular structural core bar (2), the second bulge loop (16) is sealed and matched with the endoporus of core bar undergauge pipeline section (21), described spring (6) wedging ring is located between the lower convex ring (23) and core bar (2) undergauge pipeline section (21) of spring base (5), in the upper end of spring base (5), be provided with card convex portion (8), described overcoat assembly is comprised of overcoat (1), needle stand (10), entry needle (11), the part of pulling back (12) and valve circle (9), entry needle (11) sealing is fixed on the middle and upper part of the part of pulling back (12), in needle stand (10), be provided with logical core hole, logical core hole comprises aperture section (24) and macropore section (25), and the part of pulling back (12) is built in the logical core hole of needle stand (10) and moves and coordinate with logical core hole, the top of valve circle (9) is cylindrical structure, macropore section (25) tight fit of its periphery wall and needle stand (10) bottom, the endoporus of valve circle (9) moves and coordinates with the periphery wall of the part of pulling back (12), in the bottom of valve circle (9), be provided with a make-up pawl (19), button pawl (19) is buckled in the lower end of the part of pulling back (12), in the bottom of the part of pulling back (12), be provided with the snap close ring cavity (13) being clasped with described card convex portion (8), below described snap close ring cavity (13), connect the lower surface of part (12) of pulling back, being communicated with entry needle (11) above of snap close ring cavity (13).

2. automatic retracted safe syringe according to claim 1, it is characterized in that: at the periphery wall of described needle stand (10), be provided with the first bulge loop (18) and the second bulge loop (22), the spacing cooperation of upper surface of described the second bulge loop (22) and overcoat (1), described the first bulge loop (18) is sealed and matched with interior scrobicular ring (17) buckle on overcoat (1) top.

3. automatic retracted safe syringe according to claim 1, it is characterized in that: described in the part (12) of pulling back comprise path section (26) and large footpath section (27), path section (26) is moved and is coordinated with the aperture section (24) of needle stand, large footpath section (27) diameter of part (12) of pulling back is greater than the diameter of needle stand aperture section (24), and the large footpath section (27) of the part of pulling back (12) coordinates with the endoporus of valve circle (9) is moving.

4. automatic retracted safe syringe according to claim 1, it is characterized in that: in the bottom of described valve circle (9), be provided with a pair of hole enlargement arc section (29), hole enlargement arc section (29) and the alternate setting of described button pawl (19), in the upper inside wall of described overcoat (1), be provided with necking down level rank (28), described hole enlargement arc section (29) is buckled on necking down level rank (28).