CN201070486Y

CN201070486Y - Spring type safe self-breaking syringe

Info

Publication number: CN201070486Y
Application number: CNU2007200587919U
Authority: CN
Inventors: 罗松能
Original assignee: Individual
Current assignee: GUANGDONG HAIOU MEDICAL APPARATUS STOCK CO Ltd
Priority date: 2007-10-25
Filing date: 2007-10-25
Publication date: 2008-06-11
Anticipated expiration: 2017-10-25

Abstract

The utility model relates to a spring type safety-destruct injector, which includes a steel needle, a needle seat, an injection syringe, and a core rod. The steel needle is arranged on the upper part of the needle seat, a convex ring is arranged on the lower end, and a gasket is arranged between the upper inner wall of the injection syringe and the periphery wall of the convex ring. The core rod is of a hollow cylinder structure, a rubber plug is arranged on the upper end of the core rod, a bottom plug is arranged on the lower end of the core rod, and a reduced tube section is arranged on the upper part. The reduced tube section is provided with an end plug, a locking slot is arranged on the inner wall of the reduced tube section, a locking convex ring is arranged on the periphery wall of the end plug, the locking convex ring is matched with the locking slot in a locking method. A steel needle withdrawing device is arranged between the end plug and the lower end of the needle seat. The steel needle withdrawing device consists of a locking check arranged on the lower end of the needle seat, a locking ring arranged on the upper end of the end plug, and a spring sleeved on the lower part of the end plug. The utility model has the advantages of novel structure and simple assembly technique, ect., and is applicable for large-scale mechanized production 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.Described syringe, its weak point are structure and assembly technology complexity.

Summary of the invention:

The purpose of this utility model is to overcome the weak point of the above syringe, provides a kind of structure and assembly technology simple, can realize the spring type safety self-destruction syringe of automated production.

First scheme of the present utility model comprises draw point, needle stand, injection tube and is positioned at the core bar of injection tube, the top installing draw point of needle stand, and the lower end is provided with bulge loop, between bulge loop perisporium and injection tube upper inside wall packing ring is set; Described core bar is hollow tubular structure, spring is set in the core bar, configuration plug on it, the lower end is provided with bottom plug, and top is provided with the undergauge pipeline section, undergauge pipeline section configuration end plug, be provided with the card groove on the inwall of undergauge pipeline section, be provided with the card bulge loop on the periphery wall of end plug, the card bulge loop is clasped with the card groove, between end plug and needle stand lower end, the draw point withdrawing device is set.

Alternative plan of the present utility model comprises draw point, needle stand, injection tube and the core bar that is positioned at injection tube, described injection tube is a fabricated structure, constitute by being threaded by cylindrical shell and outer needle stand, the bottom of needle stand is provided with external screw thread outside, cylinder top is provided with sleeve and interlayer screw thread, on the periphery wall of needle stand, be provided with the card bulge loop, 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, and spring is set in the core bar, configuration plug on it, the lower end is provided with bottom plug, top is provided with the undergauge pipeline section, and undergauge pipeline section configuration end plug is provided with the card groove on the inwall of undergauge pipeline section, on the periphery wall of end plug, be provided with the card bulge loop, the card bulge loop is clasped with the card groove, between end plug and needle stand lower end, is provided with the draw point withdrawing device.

This utility model, described draw point withdrawing device can be by the grabs that is arranged at the needle stand lower end, be arranged at the snap ring of end plug upper end and the spring that places the core bar intracavity and be placed in the end plug bottom constitutes.

This utility model, described plug can be the elasticity plug, comprises following ring, medium ring and goes up ring, and following ring is that disjunctor is connected with medium ring, and last ring is connected with medium ring by the elastic compression ring, on the axis hole of elasticity plug, is provided with groove.The elasticity plug is applied in after the spring type safety self-destruction syringe, can be under the prerequisite that does not change syringe construction, and plug can arrive " 0 " scale position, and the medicine that residues in the injection tube after the medicine injection meets relevant prescription.

Advantages such as this utility model has novel structure, and assembly technology is simple are applicable to the streamline mass mechanized production.

Description of drawings:

Fig. 1 is the structure principle chart of embodiment 1;

Fig. 2 is that embodiment 1 uses the view of back steel needle retractable to hollow core bar inside;

Fig. 3 is the structure principle chart of elasticity plug;

Fig. 4 is the structure principle chart of embodiment 2;

Fig. 5 is the structure principle chart of embodiment 3;

Fig. 6 is embodiment 3 steel needle retractable fundamental diagrams;

Fig. 7 is that embodiment 3 uses the view of back steel needle retractable to hollow core bar inside.

Among the figure, 1, needle guard 2, draw point 3, needle stand 4, packing ring 5, grab 6, snap ring 7, plug 70, elasticity plug 71, encircle 72 down, medium ring 73, on encircle 74, groove 75, elastic compression ring 8, spring 9, end plug 10, injection tube 11, core bar 12, bottom plug 13, end mistake piece 14, bulge loop 15, cylindrical shell 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, card bulge loop 24, card groove 25, undergauge pipeline section.

The specific embodiment:

Embodiment 1, with reference to Fig. 1-Fig. 2, a kind of spring type safety self-destruction syringe, comprise needle guard 1, draw point 2, needle stand 3, injection tube 10 and be positioned at the core bar 11 of injection tube, the top installing draw point 2 of needle stand, upper end at needle stand, filler chamber 22 is set, as being used for fixing after the applying glue and sealing draw point, be provided with bulge loop 14 in the lower end of needle stand, between bulge loop perisporium and injection tube 10 upper inside wall, packing ring 4 is set, be resilient tight fit between packing ring 4 and bulge loop perisporium and the injection tube inwall, constitute the check device of needle stand; Described core bar 11 is hollow tubular structure, spring is set in the core bar, configuration plug 7 on it, the lower end is provided with bottom plug 12, top is provided with undergauge pipeline section 25, undergauge pipeline section configuration end plug 9 is provided with card groove 24 on the inwall of undergauge pipeline section, be provided with card bulge loop 23 on the periphery wall of end plug, the card bulge loop is clasped with the card groove, can prevent to contract in the end plug, guarantee carrying out smoothly of injection work, also can play sealing function; Between end plug 9 and needle stand 3 lower ends, be provided with the draw point withdrawing device.Described draw point withdrawing device is made of the grab 5 that is arranged at the needle stand lower end, the spring 8 that is arranged at the snap ring 6 of end plug upper end and is placed in the end plug bottom.

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, when core bar continues to advance, move on the packing ring 4, and end plug 9 descends, and at this moment, the card bulge loop 23 on the end plug breaks away from the card groove 24 on undergauge pipeline section 25 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.

Embodiment 2, with reference to Fig. 3-Fig. 4, this spring type safety self-destruction syringe, compare with embodiment 1, its difference is the elasticity plug that adopts as shown in Figure 3, the elasticity plug comprises following ring 71, medium ring 72 and goes up and encircle 73 that following ring is that disjunctor is connected with medium ring, and last ring is connected with medium ring by elastic compression ring 75, on the axis hole of elasticity plug, be provided with groove 74.All the other structures and operation principle are identical with embodiment 1.

Embodiment 3, with reference to Fig. 5-Fig. 7, this spring type safety self-destruction syringe compares with embodiment 2, its difference is: (a) injection tube adopts fabricated structure, constitute by being threaded by cylindrical shell 15 and outer needle stand 16, the bottom of needle stand is provided with external screw thread 17 outside, cylinder top is provided with sleeve 19 and interlayer screw thread 18, and cylindrical shell 15 is connected with outer needle stand 16 by screw thread; (b) the needle stand check device is made of the card groove 21 that is arranged at the card bulge loop 20 on needle stand 3 periphery walls and be arranged on the internal perisporium of outer needle stand 16, contract in the needle stand in can preventing, guarantee carrying out smoothly of injection work, also can play sealing function, its advantage is to help mechanization, automatic assembly line production.All the other structures are identical with embodiment 2.

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 finished back core bar continuation propelling, the grab 5 of needle stand lower end was connected with snap ring 6 contacts and the buckle of end plug upper end.When core bar continued to advance, on the one hand, elasticity plug 7 was compressed, savings energy (as shown in Figure 6); Aspect in addition, under needle stand 3 reaction force acts, end plug 9 moves down, and when making a concerted effort during buckle frictional force greater than card bulge loop 20 and card groove 21 of the tension force of the long-pending energy of elasticity plug 70 and rebound spring 8, makes a concerted effort end plug 9 is sprung into together with needle stand 3 and draw point 2 in the cavity of core bar 11 (as shown in Figure 7).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. spring type safety self-destruction syringe, comprise draw point (2), needle stand (3), injection tube (10) and be positioned at the core bar (11) of injection tube, it is characterized by: the top installing draw point (2) of needle stand, the lower end is provided with bulge loop (14), between bulge loop perisporium and injection tube (10) upper inside wall packing ring (4) is set; Described core bar (11) is hollow tubular structure, spring is set in the core bar, configuration plug (7) on it, the lower end is provided with bottom plug (12), and top is provided with undergauge pipeline section (25), undergauge pipeline section configuration end plug (9), be provided with card groove (24) on the inwall of undergauge pipeline section, be provided with card bulge loop (23) on the periphery wall of end plug, the card bulge loop is clasped with the card groove, between end plug (9) and needle stand (3) lower end, be provided with the draw point withdrawing device.

2. spring type safety self-destruction syringe according to claim 1 is characterized by: described draw point withdrawing device by the grab that is arranged at the needle stand lower end (5), be arranged at the snap ring (6) of end plug (9) upper end and place the core bar intracavity and be placed in spring (8) formation of end plug (9) bottom.

3. spring type safety self-destruction syringe according to claim 1 and 2, it is characterized by: described plug is elasticity plug (70), comprise ring (71), medium ring (72) and last ring (73) down, following ring is that disjunctor is connected with medium ring, last ring is connected with medium ring by elastic compression ring (75), on the axis hole of elasticity plug, be provided with groove (74).

4. spring type safety self-destruction syringe, comprise draw point (2), needle stand (3), injection tube and the core bar (11) that is positioned at injection tube, it is characterized by: described injection tube is a fabricated structure, by cylindrical shell (15) and outer needle stand (16) by the formation that is threaded, the bottom of needle stand is provided with external screw thread (17) outside, cylinder top is provided with sleeve (19) and interlayer screw thread (18), on needle stand, install draw point (2), on the periphery wall of needle stand, be provided with card bulge loop (20), the internal perisporium of needle stand is provided with and the card groove (21) that blocks the bulge loop coupling outside, described core bar (11) is hollow tubular structure, and spring is set in the core bar, configuration plug (7) on it, the lower end is provided with bottom plug (12), top is provided with undergauge pipeline section (25), and undergauge pipeline section configuration end plug (9) is provided with card groove (24) on the inwall of undergauge pipeline section, on the periphery wall of end plug, be provided with card bulge loop (23), the card bulge loop is clasped with the card groove, between end plug (9) and needle stand (3) lower end, is provided with the draw point withdrawing device.

5. spring type safety self-destruction syringe according to claim 4 is characterized by: described draw point withdrawing device by the grab that is arranged at the needle stand lower end (5), be arranged at the snap ring (6) of end plug (9) upper end and place the core bar intracavity and be placed in spring (8) formation of end plug (9) bottom.

6. according to claim 4 or 5 described spring type safety self-destruction syringes, it is characterized by: described plug is elasticity plug (70), comprise ring (71), medium ring (72) and last ring (73) down, following ring is that disjunctor is connected with medium ring, last ring is connected with medium ring by elastic compression ring (75), on the axis hole of elasticity plug, be provided with groove (74).