Disposable safe self-destruction syringe

Abstract

The invention discloses a disposable safe self-destruction syringe, which comprises an outer cylinder, a needle stand and a push rod, wherein the needle stand consists of an outer circular part and acentral conical part, infusion channels penetrating up and down are formed in the central conical part, and a clamping convex platform is arranged at the bottom of the infusion channel; a collar is formed below the needle stand, the whole collar consists of a central part and a connecting bottom part, an outer flange is formed in the top end of the central part, and a central hole penetrating up and down is formed in the center of the central part; the outer wall of the connecting bottom part is seal and positioned on the inner hole wall of the outer cylinder; and a locking structure formed byan upper locking projection and a lower locking projection is arranged at the lower part of the inner hole of the outer cylinder, the maximum outer diameter of the collar is larger than the inner diameter of the upper locking projection, and the collar can pass over the upper locking projection to realize an upper locking stop with the upper locking projection after being pulled back into the position by the push rod. Self-locking is realized through the collar and the outer cylinder, forward pushing and clamping between the push rod and the outer cylinder are removed, so that the mounting ofthe push rod is facilitated, and the self-destruction of the syringe in advance can be effectively avoided.

Description

technical field [0001] The invention relates to a syringe, in particular to a disposable safety self-destruction syringe. Background technique [0002] In the modern medical process, the syringe is the most commonly used device for doctors. In order to avoid safety and medical risks such as cross-infection, the existing syringes adopt a one-time self-destruct structure, that is, the syringe is self-destructed after use. Cannot be reused twice. [0003] At present, there are many types of self-destructing syringes on the market. Among them, the self-destructing structure of a syringe is realized by manually pulling back the push rod. At the tail of the outer cylinder, there is an engaging groove formed by upper and lower locking protrusions. The outer wall of the head is provided with an engaging protrusion. Once the push rod is pulled back to make the engaging protrusion pass over the upper locking protrusion and enter the engaging groove, the locking of the push rod is rea...

AI Technical Summary

Problems solved by technology

[0004] The snap-fit ​​locking self-destruct structure of the above push rod and the outer cylinder has the following deficiencies: 1. Because the push rod is a rear-mounted structure, the setting of the upper and lower locking protrusions will bring difficulties to the installation of the push rod. The assembly allows the head of the push rod to pass through the upper and lower locking protrusions and enter the interior of the outer cylinder; 2. Once the drawing is too large during the pumping process, the engaging protrusion on the push rod will pass over the upper locking protrusion And lead to premature self-destruction, resulting in unnecessary loss of liquid medicine and syringes

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