Syringe

Abstract

The invention relates to an injector. The injector comprises a tube body, the fixing sleeve is vertically arranged in the pipe body and is fixed relative to the pipe body; the injection assembly comprises a needle tube, a piston, a piston rod and a needle head, the needle tube is fixedly arranged in the fixing sleeve in a penetrating mode, the piston is arranged in the needle tube and can move up and down relative to the needle tube, the lower end of the piston rod is inserted in the needle tube and can abut against the upper end face of the piston, the piston rod can move up and down along the needle tube, and the needle head is connected with the lower end of the needle tube and extends out of the tube body; the movable sleeve is arranged between the fixed sleeve and the tube body, the lower end of the movable sleeve can extend out of the tube body and hide the needle inside, and the movable sleeve moves upwards relative to the fixed sleeve when being pressed; the elastic piece acts on the movable sleeve, so that the movable sleeve always keeps a trend of moving downwards; the handle sleeve is sleeved at the upper end of the pipe body and can move up and down relative to the pipe body, and the handle sleeve is connected with the upper end of the piston rod. The injector is convenient to use, and the injection speed and the injection amount can be controlled.

Description

technical field [0001] The invention relates to the technical field of medical appliances, in particular to a syringe. Background technique [0002] Syringes are widely used in fields such as cosmetology and medical treatment. Syringes have manual injection and automatic injection modes in operation. Manual injectors such as the Chinese utility model patent disclosed by the patent No. CN201720986544.9 (notification No. As shown in the Syringe for Easy-to-Control Injection", it includes a syringe, a push rod, a piston and a needle. When injecting, the user grasps the syringe with four fingers and the palm of the hand, and presses the push rod with the thumb to complete the injection. This has the following problems : 1. The maximum stroke of the thumb of an ordinary adult is 20mm, and the grip type determines that the syringe cannot be made thick, which limits the amount of medicine in the syringe; 2. The syringe is inconvenient to use, and the user must first use the aforeme...

AI Technical Summary

Problems solved by technology

[0002] Syringes are widely used in fields such as cosmetology and medical treatment. Syringes have manual injection and automatic injection modes in operation. Manual injectors such as the Chinese utility model patent disclosed by the patent No. CN201720986544.9 (notification No. As shown in the Syringe for Easy-to-Control Injection", it includes a syringe, a push rod, a piston and a needle. When injecting, the user grasps the syringe with four fingers and the palm of the hand, and presses the push rod with the thumb to complete the injection. This has the following problems : 1. The maximum stroke of the thumb of an ordinary adult is 20mm, and the grip type determines that the syringe cannot be made thick, which limits the amount of medicine in the syringe; 2. The syringe is inconvenient to use, and the user must first use the aforementioned Hold the syringe in the prescribed posture, and then press the push rod with your thumb to complete the injection process. If the elderly or other patients with inflexible hands and feet want to complete self-injection, there are certain thresholds for use

[0003] An automatic injector such as the "An Automatic Injection Device" disclosed in the Chinese Utility Model Patent No. CN202020808343.1 (publication No. CN212395534U), the movable sleeve is pressed against the skin and the injection is automatically completed soon after pressing, but the injection speed is uncontrollable , the injection volume cannot be controlled, even if it is an injection pen that can control the injection volume, the dose must be set first, which is inconvenient to use, and generally the injection cannot be stopped halfway

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