SAFETY SYRINGE Russian patent published in 2017 - IPC A61M5/32 A61M5/50 

FIELD: medicine.

SUBSTANCE: safety syringe comprises a barrel, the first folded ring, a piston and a needle head. The cylinder extends in the direction of axis L and includes the first tubular portion and the second tubular portion extending from the end of the first tubular portion. The folded first ring is provided with the first flexible portion. The first folded ring is mounted on the inner side of the first tubular portion about the axis L with the possibility of unfolding of the said ring, so that it is clamped and extended from the first tubular portion in direction of the second tubular portion. The piston includes a rod located along the axis L and movably inserted in the cylinder, and a plug mounted at the end of the rod. The needle head is provided with the second folded ring having the second flexible portion, and is detachably installed in the second tubular portion, when the piston plug is pressed into the needle head to stretch the first flexible portion, and for contact with the second flexible portion, so that the needle is in the first tubular section when the piston is retracted.

EFFECT: invention features provide a simpler assembly and reduce manufacturing costs.

8 cl, 10 dwg