Safety unit of exsanguinating injection needle

Abstract

A safety device for the needle of blood-drawing injector is composed of a sleeve tube unit with an L-shaped guide slot and an open front end, a cover unit matched with said open front end of sleeve tube, a dual-needle base unit which is a solid cylinder with two needles and two steps respectively positioned at its both ends, and an injection tube matched with said dual-needle base by said step.

Description

technical field [0001] The invention relates to a safety device for blood-drawing injection needles, in particular to a safety device that can be widely applied to blood-drawing injection needles of various injection cylinders without changing the original injection cylinders and needles. Background technique [0002] Generally, the structure of a conventional injection syringe, such as Announcement No. 103796 and "Safe Needle Cover for Injection Syringes", as shown in Figure 8, generally consists of an injection cylinder 1, a needle 2, and a sheath 3 When the nursing staff wants to inject, they can pull out the sheath 3 from the injection cylinder body 1, so that the needle 2 can be exposed and injected directly; It is necessary to put the sheath 3 back on the injection cylinder 1. At this time, because the aperture of the sheath 3 is small and its operating position is located in front of the needle 2, during the process of inserting it again, hold the sheath 3 Therefore,...

AI Technical Summary

Problems solved by technology

[0002] Generally, the structure of a conventional injection syringe, such as Announcement No. 103796 and "Safe Needle Cover for Injection Syringes", as shown in Figure 8, generally consists of an injection cylinder 1, a needle 2, and a sheath 3 When the nursing staff wants to inject, they can pull out the sheath 3 from the injection cylinder body 1, so that the needle 2 can be exposed and injected directly; It is necessary to put the sheath 3 back on the injection cylinder 1. At this time, because the aperture of the sheath 3 is small and its operating position is located in front of the needle 2, during the process of inserting it again, hold the sheath 3 Therefore, as long as the nursing staff is a little careless, the hand holding the sheath 3 may be injured by the tip 2a of the needle 2, or even infected by the virus; Therefore, in the process of use, the safety is not good, and there are really unsatisfactory places

[0003] Due to the lack of the above-mentioned commonly used injection syringe structure, there have been various improvements to safe injection syringes, such as Announcement No. 161397 "Safe Needle", Announcement No. 210509 "Protective Syringe", Announcement No. 212302 Announcement No. 232815 "Simple Safety Syringes Directly to Blood Vessels", Announcement No. 234883 "New Structure of Gate-Closed Safety Syringes", Announcement No. 253192 "Direct Connection No. 283947 "Safe Needle Cover Structure Design", No. 320057 "Convenience Disposable Safety Syringe", No. 349405 "Returnable Safety Needle Cover", No. 357615 "Safety Needle Cover" Syringe Structure Improvement", Announcement No. 405405 "Safety Syringe Structure Improvement", Announcement No. 445860 "Safety Syringe", Announcement No. 489662 "Disposable Safety Syringe", etc.; The debending of the injection needle requires a substantial change to the long-used original structure of the safety injection syringe. With the traditional injection cylinder structure, there are insurmountable problems in the smooth operation of the injection syringe, the watertight structure of the injection and the safety in use, and it needs to be improved.

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