Anti -contamination syringe

The utility model provides an anti -contamination syringe, including cylinder, piston assembly, syringe needle, piston assembly includes piston and piston rod, cylinder length direction's one end is equipped with the nipple, cylinder length direction's the other end is equipped with the opening, and piston assembly's piston stretches into the cylinder through the opening in, the outside cover of piston rod is equipped with aseptic spring housing, and the one end and the cylinder of aseptic spring housing are equipped with open -ended one end sealing connection, and the one end sealing connection of piston is kept away from to the other end and piston rod. The utility model discloses an anti -contamination syringe through setting up aseptic spring housing, makes cylinder inner wall, pistonand partial piston rod last and is in the germ -free condition, prevents affected cylinder inner wall and the piston of polluting carelessly of operating personnel. 本实用新型提供种防污染注射器，包括针筒、活塞组件、针头，活塞组件包括活塞和活塞杆；针筒长度方向的端设有乳头；针筒长度方向