Abstract: A safety syringe comprises a barrel, which has a body forming a receiving hole, a stop portion in the receiving hole. A needle holder has a hole therein, an elastic lock piece formed a claw at distal end, and a dragged portion. The needle holder is received in the receiving hole of the barrel for the claw can lock with the stop portion of the barrel. A supporter, which is slidable received in the hole of the needle holder for supporting the elastic lock pieces to make the needle holder fixed secured in the barrel. And a plunger set has a bumper to move away said supporter and withdraw said needle holder.

Abstract: A safety syringe comprises a barrel having a projection in a rear end thereof, a needle holder for mount of a needle, the needle holder having a dragged portion, a stopper movable in the barrel, the stopper having a drag portion adapted for engaging into the dragged portion of the needle holder and a plunger connector, a plunger for moving the stopper in the barrel having a stopper connector engaged with the plunger connector of the stopper. When pulled backwards to the end after injection, the plunger connector of the stopper is forced onto the projection of the barrel and disengaged from the plunger, enabling the plunger to be removed from said barrel.

Abstract: A safety syringe comprises a barrel, which has a body forming a receiving hole, a stop portion in the receiving hole. A needle holder has a hole therein, an elastic lock piece formed a claw at distal end, and a dragged portion. The needle holder is received in the receiving hole of the barrel for the claw can lock with the stop portion of the barrel. A supporter, which is slidable received in the hole of the needle holder for supporting the elastic lock pieces to make the needle holder fixed secured in the barrel. And a plunger set has a bumper to move away said supporter and withdraw said needle holder.

Abstract: A safety syringe comprises a barrel having a projection in a rear end thereof, a needle holder for mount of a needle, the needle holder having a dragged portion, a stopper movable in the barrel, the stopper having a drag portion adapted for engaging into the dragged portion of the needle holder and a plunger connector, a plunger for moving the stopper in the barrel having a stopper connector engaged with the plunger connector of the stopper. When pulled backwards to the end after injection, the plunger connector of the stopper is forced onto the projection of the barrel and disengaged from the plunger, enabling the plunger to be removed from said barrel.

Abstract: A flow regulator is connectable to an infusion tube of an IV tubing set which having a needle holder and an infusion needle. The flow regulator comprises a housing having an body, a through hole longitudinally extended through front and rear sides of the body for the passing of the infusion tube, a regulation controller installed in the housing and adapted to apply pressure to the infusion tube extended through the through hole of the housing, and a receiving barrel having an body fixedly fastened to the housing, a receiving chamber defined in the body of the receiving barrel and adapted to receive the infusion needle of the IV tubing set with which the flow regulator is used, and an opening in one end of the body of the receiving barrel through which the infusion needle of the IV tubing set is inserted into the receiving chamber.