CN2631526Y

CN2631526Y - Safety self-destroying syringes

Info

Publication number: CN2631526Y
Application number: CN 03254982
Authority: CN
Inventors: 郑金露; 仇国华
Original assignee: YIXIN MEDICAL APPLIANCES CO Ltd JIANGXI PROV
Current assignee: YIXIN MEDICAL APPLIANCES CO Ltd JIANGXI PROV
Priority date: 2003-07-24
Filing date: 2003-07-24
Publication date: 2004-08-11
Anticipated expiration: 2013-07-24

Abstract

The utility model relates to a syringe-retraction type safe self-destruction injector, belonging to the field of the medical apparatus and technology. The component parts include a sheath, an injection needle, an injection needle base, an injection needle base joint, a mental hook, a core rod, an outer casing and a sealed piston. The characteristic is that, the syringe joint is provided with a mental hook thereon; the head part of the core rod has a hollow intracavity, the wall of which has a flip-chip structure. After the injector injects medicine liquid, the mental hook can penetrate into the core rod intracavity and automatically hook the core rod, then the pumping back core rod pulls the syringe into the sheath. The utility model is of simple structure and the production technology is the same to the traditional injector. The clinical using habits remain the same. The syringe can be treated safely to prevent cross-infection so that the medical personnel and other relevant personnel can be protected.

Description

Safety self-destructing syringe

Technical field

This utility model relates to medical apparatus and instruments, particularly injection needle restoring formula safety self-destructive syringe.

Technical background

The shortcoming of conventional syringe is both can reuse society is worked the mischief, can not damage needle tubing safely again, cause cross infection and medical personnel by pricking wound and infection etc., at present, safety self-destructing syringe does not have effective protection, and is preceding by self-destruction to prevent that syringe from using.

Summary of the invention

The purpose of this utility model, provide a kind of finish injecting liquid drug after, the needle tubing pumpback is to overcoat, the core bar that fractures is retained in the overcoat needle tubing, reaches the syringe of self-destruction.

The purpose of this utility model is achieved in that it comprises: entry needle, needle stand joint, metal hook, core bar, overcoat, O-ring seals and packed-piston.It is characterized in that device has a metal hook on the needle tubing seated connection head, the core bar head has a hollow cavity, and this internal chamber wall has back-off structure.Behind the intact medicinal liquid of injector to inject, metal hook can thrust the core bar inner chamber, hooks core bar automatically, and the pumpback core bar retracts needle tubing in the overcoat.Needle stand joint 5 outer walls are provided with positioning tooth, and outer casing inner wall is provided with the positioning tooth that matches, and also are provided with annular protrusion on the needle stand joint, be provided with O-ring seals between the annular protrusion, in addition, structurally, the core bar afterbody is provided with an elastic wall, and to withstand overcoat, it is preceding by self-destruction to prevent that syringe from using.

This utility model is simple in structure, and production technology is the same with conventional syringe, and clinical use habit is constant, and the characteristic of existing conventional syringe can be handled needle tubing again safely, prevents cross infection, thus protection medical work personnel and other related personnel.

Below in conjunction with drawings and Examples this utility model is further described:

Description of drawings

Fig. 1 is this utility model structure installation diagram.

Fig. 2 for this utility model injecting liquid drug finish after sketch map.

Fig. 3 is the intact back pumpback of this utility model injecting liquid drug sketch map to the overcoat.

Fig. 4 for this utility model injecting liquid drug finish after core snap bar sketch map.

Fig. 5, Fig. 6, Fig. 7 are this utility model design of part sketch map.

Specific embodiment

As shown in Figure 1, this utility model component parts is: core bar 1, overcoat 2, packed-piston 3, metal hook 4, needle stand joint 5, O-ring seals 6, entry needle needle stand 7, entry needle 8, sheath 9, elastic wall 10.Device has a metal hook 4 on the needle tubing seated connection head 5, and the core bar head is provided with a hollow cavity 23, and this internal chamber wall has back-off structure 25.Behind the intact medicinal liquid of injector to inject, metal hook 4 can thrust core bar inner chamber 23, hooks core bar automatically, and the pumpback core bar retracts entry needle 8 in the overcoat.Needle stand joint 5 outer walls are provided with positioning tooth 21, and overcoat 2 inwalls are provided with the positioning tooth that matches, and also are provided with two circle annular protrusions 22 on the needle stand joint 5, are provided with O-ring seals 6 between the annular protrusion.

Fig. 5 is overcoat 2 structural representations, and expression overcoat 2 and needle stand joint 5 localized structures, radial location structure are the profile of tooth location, and axial positioning structure is the step location.

Fig. 6 is needle stand joint 5 structural representations, the structure of expression needle stand joint 5 and overcoat 2 sealings, and needle stand joint 5 outer rings are provided with protruding ring, O-ring seals 6 and overcoat 2 inwall fluid-tight engagement and seal.

Fig. 7 is core bar 1 structural representation, and core bar 1 front end inner chamber is provided with the back-off structure of blocking metal hook 4, and core bar 1 front portion is provided with the mouth 24 that fractures, and uses preceding self-destruction for preventing syringe, and core bar 1 afterbody is provided with elastic wall 10.

When this utility model embodiment uses, with finger elastic wall 10 is depressed, it can be stuck on core bar 1 gusset, and the position of elastic wall 10 begins dosing then as shown in Figure 2, injection.When injection was finished, metal hook 4 can be worn out packed-piston 3 and be stuck in intracavity in core bar 1 front end, and the core bar 1 of pulling back then, core bar 1 spur needle stand joint 5, thereby entry needle 8 is drawn back in the overcoat, as shown in Figure 3 by metal hook 4.After drawing back entry needle 8, the core bar 1 that fractures is retained in entry needle needle tubing 8 in the overcoat 2, as shown in Figure 4, if release needle tubing by force, will destroy overcoat.

Claims

1, a kind of safety self-destructive syringe, it comprises: core bar (1), overcoat (2), packed-piston (3), metal hook (4), needle stand joint (5), entry needle needle stand (7), entry needle (8), sheath (9), elastic wall (10), it is characterized in that: device has a metal hook on the needle tubing seated connection head, the core bar head has a hollow cavity (23), this internal chamber wall has back-off structure (25), the core bar afterbody is provided with an elastic wall (10), needle stand joint (5) outer wall is provided with positioning tooth (21), and overcoat (2) inwall is provided with the positioning tooth that matches.

2, safety self-destructing syringe according to claim 1 is characterized in that: also be provided with two circle annular protrusions (22) on the needle stand joint (5), be provided with O-ring seals (6) between the annular protrusion.

3, safety self-destructing syringe according to claim 1 is characterized in that: fracture mouthful (24) are established in core bar (1) front portion, use preceding self-destruction for preventing syringe, and core bar (1) afterbody is provided with elastic wall (10).