CN201375735Y

CN201375735Y - Spring type safe self-destruction syringe

Info

Publication number: CN201375735Y
Application number: CN200920056582U
Authority: CN
Inventors: 罗绍基
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-13
Filing date: 2009-05-13
Publication date: 2010-01-06
Anticipated expiration: 2019-05-13

Abstract

The utility model relates to a syringe, which comprises a steel needle, a needle carrier, a syringe cylinder and a core pin. The syringe cylinder has a combined structure and is formed by a cylinder body and an external needle carrier through threaded connection, and a grab is arranged at the lower end of the needle carrier; a clamping convex ring is arranged on the outer circumferential wall of the needle carrier, and a clamping concave groove is formed on the inner circumferential wall of the external needle carrier; the core pin has a hollow tubular structure, the upper part of the core pin is a reducing pipe section, an end plug is arranged on the reducing pipe section, a spring is sheathed at the lower part of the end plug, a snap ring is arranged at the upper end of the end plug, a clamping convex ring is arranged on the outer circumferential wall of the end plug, a clamping concave groove is formed on the inner wall of the reducing pipe section, and the clamping convex ring is buckled and matched with the clamping concave groove; a rubber plug convex ring is arranged on the inner side at the upper part of a rubber plug; and seal rings are arranged on both the needle carrier and the external needle carrier, and hooks are integrally arranged at the lower part of a sleeve and are buckled with the lower edge of the needle carrier. The spring type safe self-destruction syringe has the characteristics of simple structure, low requirements for assembly technique, high product qualification rate and so on, and is suitable for the large-scale production of assembly lines.

Description

Spring type safety self-destruction syringe

Technical field:

This utility model relates to a kind of disposable syringe, can make draw point recoil to the interior safety type self-destroyed syringe of injection tube after especially a kind of the use.

Background technology:

Cause the cross infection of virus for fear of using antihygienic syringe, disposable syringe is widely used at medical field.Reuse in order to stop artificial recovery, people are provided with self-desttruction equipment on disposable syringe.But,, causes common self-destruction syringe the cross infection of virus though preventing the repeated use of syringe to a certain extent, but syringe uses the back because draw point exposes and makes depleted syringe produce many inconvenience in processes such as collection, transportation, processing, still might stab medical worker and other relevant personnel, cause the infection of virus and bacteria.

Chinese patent once disclosed multinomial steel needle retractable destructing safety formula syringe, but the characteristics of its structure are between needle stand and inside, injection tube upper end rebound spring to be set, after using described injector to inject, under the effect of spring, draw point is gone in the cavity of core bar together with needle stand by resilience, prevent that syringe from using the back because draw point exposes the phenomenon generation of stabbing the relevant personnel, reach purpose of safety.But, find that in practice there is following weak point in existing steel needle retractable destructing safety formula syringe: since between needle stand and the outer needle stand snap fit and under the effect of spring draw point gone in the cavity of core bar by resilience together with needle stand, only rely on the card bulge loop be arranged on needle stand and the outer needle stand and block frictional force between the groove, both degrees of tightness cooperate and are difficult to control: when too tight, spring is difficult to spring into draw point in the cavity of core bar together with needle stand; When too loose, needle stand can bounce back automatically during injection, and injection work can't be carried out; In addition, only rely between needle stand and the outer needle stand and cooperate as sealing the sealing property instability between card bulge loop and the card groove.

Summary of the invention:

The purpose of this utility model is to overcome the shortcoming of the above syringe, and a kind of spring type safety self-destruction syringe of improved its dependable performance is provided.

This utility model, comprise draw point and needle stand thereof, injection tube and be positioned at the core bar of injection tube, described injection tube is a fabricated structure, is made of by being threaded cylindrical shell and outer needle stand, the bottom of needle stand is provided with external screw thread outside, and cylinder top is provided with sleeve and interlayer screw thread; Lower end at needle stand is provided with grab; Be provided with the card bulge loop on the periphery wall of needle stand, the internal perisporium of needle stand is provided with and the card groove that blocks the bulge loop coupling outside; Described core bar is hollow tubular structure, the lower end is provided with bottom plug, top is the undergauge pipeline section, disposes end plug on the undergauge pipeline section, and the bottom of end plug is with spring, the upper end of end plug is provided with snap ring, snap ring can be connected with described grab buckle, and the upper surface of described core bar is passed in the upper end of end plug, is provided with the card bulge loop at the periphery wall of end plug, inwall at the undergauge pipeline section is provided with the card groove, and the card bulge loop is clasped with the card groove; On the top of plug, the inboard adjacent with described end plug is provided with 1-2 plug bulge loop.

This utility model, can needle stand and outside between the needle stand, be provided with sealing ring, sealing ring is arranged on the groove that needle stand reserves.

This utility model can be in described telescopic bottom, and disjunctor is provided with the hook that 4-6 can fasten with the needle stand lower edge, and the bottom of each hook is provided with interior inclined-plane, in the upper end of end plug, be provided with described in the outer inclined-plane that adapts, inclined-plane.

This utility model has following characteristics:

Because on the top of plug, the inboard adjacent with described end plug is provided with the plug bulge loop; And needle stand and outside between the needle stand, be provided with sealing ring, thereby improve the sealing reliability of syringe.In addition, because in described telescopic bottom, disjunctor is provided with a plurality of hooks that fasten with the needle stand lower edge, makes it in injection process, effectively prevents the generation of the automatic rebound phenomenon of needle stand; The bottom of hook is provided with interior inclined-plane, and interior inclined-plane cooperates with the outer inclined-plane of end plug upper end, makes it after injection is finished, continue the pushing core bar, the inclined-plane at end plug top squeezes hook and opens, and the dogging portion of hook breaks away from needle stand, and spring can be sprung into draw point in the cavity of core bar together with needle stand smoothly.

This utility model has novel structure, reliable in quality, and advantage such as assembly technology is simple is applicable to the streamline mass mechanized production.

Description of drawings:

Fig. 1 is the structure principle chart of embodiment.

Fig. 2 is the Q portion enlarged drawing of Fig. 1.

Among the figure, 1, needle guard 2, draw point 3, needle stand 4, sealing ring 5, grab 6, snap ring 7, plug 8, spring 9, end plug 10, cylindrical shell 11, core bar 12, bottom plug 13, end mistake piece 14, card bulge loop 15, card groove 16, outer needle stand 17, external screw thread 18, interlayer screw thread 19, sleeve 20, card bulge loop 21, card groove 22, filler chamber 23, plug bulge loop 24, undergauge pipeline section 25, groove 26, hook 27, interior inclined-plane 28, outer inclined-plane.

The specific embodiment:

With reference to Fig. 1, Fig. 2, this spring type safety self-destruction syringe, comprise draw point 2 and needle stand 3 thereof, injection tube and be positioned at the core bar 11 of injection tube, described injection tube is a fabricated structure, constitute by being threaded by cylindrical shell 10 and outer needle stand 16, the bottom of needle stand is provided with external screw thread 17 outside, and cylinder top is provided with sleeve 19 and interlayer screw thread 18; Be provided with grab 5 in the lower end of needle stand; Be provided with card bulge loop 14 on the periphery wall of needle stand, the internal perisporium of needle stand is provided with and the card groove 15 that blocks the bulge loop coupling outside; Described core bar 11 is hollow tubular structure, the lower end is provided with bottom plug 12, top is undergauge pipeline section 24, configuration end plug 9 on the undergauge pipeline section, the bottom of end plug 9 is with spring 8, and the upper end of end plug 9 is provided with snap ring 6, the upper surface of described core bar 11 is passed in the upper end of end plug 9, periphery wall at end plug is provided with card bulge loop 20, is provided with card groove 21 at the inwall of undergauge pipeline section, and the card bulge loop is clasped with the card groove; On the top of plug 7, the inboard adjacent with described end plug 9 is provided with 1 plug bulge loop 23; Needle stand 3 and outside between the needle stand 16, be provided with sealing ring 4, sealing ring is arranged on the groove 25 that needle stand 3 reserves.

Present embodiment, also in the bottom of described sleeve 19, disjunctor is provided with 4 hooks 26 that fasten with needle stand 3 lower edges, and the bottom of each hook is provided with interior inclined-plane 27, in the upper end of end plug 9, is provided with the outer inclined-plane 28 that adapts with described interior inclined-plane 27.

Its using method and operation principle are as follows:

When clinical use, remove earlier and end mistake piece 13, take off needle guard 1, the using method of syringe extracts medicinal liquid routinely then, and also the using method of syringe is carried out injecting liquid drug routinely.When liquid medicine injection finishes back core bar continuation propelling, the grab 5 of needle stand lower end is connected with snap ring 6 contacts and the buckle of end plug upper end, meanwhile, the interior inclined-plane 27 at end plug 9 tops squeezes hook 26 and opens, the dogging portion of hook breaks away from needle stand, thereby reduce the frictional resistance of needle stand, make spring spring into draw point in the cavity of core bar together with needle stand smoothly, at this moment, card bulge loop 20 on the end plug breaks away from the card groove 21 on undergauge pipeline section 24 inwalls, buckle frictional force is eliminated, and spring springs into end plug 9 in the cavity of core bar 11 together with needle stand 3 and draw point 2.At this moment, syringe disintegrates and can't reuse, and the draw point of crossing with medicinal liquid and contact patients 2 all is stored in the tube of core bar 11, reaches self-destruction, safe effect.

Claims

1, a kind of spring type safety self-destruction syringe, comprise draw point (2) and needle stand (3) thereof, injection tube and be positioned at the core bar (11) of injection tube, it is characterized by: described injection tube is a fabricated structure, by cylindrical shell (10) and outer needle stand (16) by the formation that is threaded, the bottom of needle stand is provided with external screw thread (17) outside, and cylinder top is provided with sleeve (19) and interlayer screw thread (18); Be provided with grab (5) in the lower end of needle stand; Be provided with card bulge loop (14) on the periphery wall of needle stand, the internal perisporium of needle stand is provided with and the card groove (15) that blocks the bulge loop coupling outside; Described core bar (11) is hollow tubular structure, the lower end is provided with bottom plug (12), top is undergauge pipeline section (24), dispose end plug (9) on the undergauge pipeline section, the bottom of end plug (9) is with spring (8), and the upper end of end plug (9) is provided with snap ring (6), the upper surface of described core bar (11) is passed in the upper end of end plug (9), periphery wall at end plug is provided with card bulge loop (20), is provided with card groove (21) at the inwall of undergauge pipeline section, and the card bulge loop is clasped with the card groove; Top and the adjacent inboard of described end plug (9) at plug (7) are provided with 1-2 plug bulge loop (23).

2, spring type safety self-destruction syringe according to claim 1 is characterized by: needle stand (3) and outside between the needle stand (16), be provided with sealing ring (4), sealing ring is arranged on the groove (25) that needle stand (3) reserves.

3, spring type safety self-destruction syringe according to claim 1 and 2, it is characterized by: bottom in described sleeve (19), disjunctor is provided with 4-6 hook (26) that fastens with needle stand (3) lower edge, the bottom of each hook is provided with interior inclined-plane (27), upper end in end plug (9) is provided with the outer inclined-plane (28) that adapts with described interior inclined-plane (27).