Electric-powered air release valve and blood pressure gauge

摘要

The electric-powered air release valve comprises a nozzle, a fixed iron core; an excitation coil; a movable iron plate; a leaf spring: a rubber valve; and a yoke; wherein a circular hole capable of accommodating a circular column part at one end of the fixed iron core when the movable iron plate is moved toward the nozzle is formed in the movable iron plate; and a magnetic gap is maintained between an internal periphery of the circular hole and an external periphery of the circular column part at one end of the fixed iron core.