An improved syringe

Abstract

The application relates to the technical field of improved syringes, in particular to an improved syringe which comprises: a combined injection needle, the combined injection needle comprises multiple groups of needle bodies and needle seats, and the multiple groups of needle bodies and needle seats are detachably connected with each other; a syringe barrel, one end of the needle seat of the combined injection needle is connected with the front end of the syringe barrel, a tube shell is arranged on the outer side of the syringe barrel in a sliding mode, and the syringe barrel can step through in the tube shell with the length sum of each group of needle body and needle seat as a distance unit; and a needle removal limiting pin, the needle removal limiting pin is connected to the front end of the tube shell in a retractable mode, and the front end position of the needle removal limiting pin corresponds to the moving path position of the needle seat retracted into the tube shell, the improved syringe can realize quick automatic needle replacement, compared with the existing syringes, manual needle replacement operation is greatly reduced, needle pulling operation is saved, and the improved syringe is safer and more convenient.

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