Patent ID: 8696553
Filing Date: 2014-04-15
Classification: A61B,A61M,F04B

Abstract:
1. An automatic retractable syringe comprising: a tubular body on whose front end portion a syringe opening is provided, the syringe opening being an air supply opening; a piston body in which a vent passage passing from a vent hole of its pressing portion through inside to its front end portion is formed and which reciprocates inside the tubular body, wherein when the pressing portion is pressed by a finger plugging the vent hole, air can be supplied from the syringe opening; a spring which is disposed between the piston body and the tubular body, and returns the pressed piston body to its original position; and when the pressing operation of the pressing portion is canceled, the vent hole plugging up with the finger is opened, and the piston body returns to the original position by the spring, and the vent passage takes in the air for air supply into the tubular body, then the piston body sends the air in the tubular body from the syringe opening by the pressing operation of the pressing portion, causing the reciprocation of the piston body; wherein the syringe opening is pipe-connected to an air supply port of an endoscope or a water supply port of the endoscope or a water supply port of the endoscope through a liquid storage tank.