Syringe used in medicine comprises cylinder with thin tube at one end, movable plunger with piston rod, and protective sleeve.

摘要

Syringe comprises a cylinder (1) with a thin tube (2) at one end, a movable plunger (4) with a piston rod (5) and a protective sleeve (6). The inner mantle surface of the sleeve has a groove (7) which can hold a ring member. The sleeve outer mantle surface has finger holding members and the piston rod has a thumb locating element.