Automatic injector

Abstract

The invention discloses an automatic injector. The injector comprises an injection cylinder, a telescopic push rod and a medicine injection tube, wherein the telescopic push rod driven by a motor is installed in the injection cylinder, and the medicine injection tube is detachably placed in the injection cylinder; and the telescopic push rod comprises a rear rod, a fixed disc, a lead screw assembly, a sliding disc and a front rod, one end of the rear rod is installed on a rear end cover of an inner cavity of the injection cylinder, the other end of the rear rod is fixedly connected with the fixed disc, the transmission end of the lead screw assembly is installed on the fixed disc, the sliding disc is fixed to a nut of the lead screw assembly, one end of the front rod is fixed to the sliding disc, and the other end of the front rod is inserted into a piston piece at the top of the medicine injection tube. The automatic injector is reasonable in structural design and convenient to install and use, an automatic injection action of the injector can be achieved, and the automatic injector is more stable in action and high in safety coefficient. The medicine injection tube is replaced byopening a front cover, injection operation of different patients can be achieved, the risk of cross medicine infection does not exist, and the working efficiency of a medical staff is improved.

Description

technical field [0001] The invention relates to the technical field of injectors, in particular to an automatic injector. Background technique [0002] Most of the syringes currently used clinically are syringe-type syringes, and the medicinal liquid in the syringe is injected into the human body by pushing the piston by hand. In the prior art, the syringes are filled by pulling the piston rod by hand to form a negative pressure in the barrel to complete the filling of the syringe. Nurses need to dispense medicines for infusions to a large number of patients every day, and the hands are too tired to use the original syringes; and when some specialists do therapeutic injections, they can only free up one hand because they cannot free up two hands, such as when pain doctors do injection therapy , holding the B-ultrasound in one hand and the syringe in the other, but an assistant is needed, and the existing syringes are inconvenient to use with one hand. Contents of the inve...

AI Technical Summary

Problems solved by technology

Nurses need to dispense medicines for infusions to a large number of patients every day, and the hands are too tired to use the original syringes; and when some specialties do therapeutic injections, they can only free up one hand because they cannot free up two hands, such as when pain doctors do injection therapy , holding the B-ultrasound in one hand and the syringe in the other, but an assistant is needed, and the existing syringes are inconvenient to use with one hand

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