Patent ID: 8314533

Claim:
A vibratory actuator for driving a movable body provided to be movable relative to a fixed body, comprising: an actuator body, including a piezoelectric element, for generating vibration; a driver element provided on one side surface of the actuator body and configured to be operated according to the vibration of the actuator body, thereby outputting driving force; a pressurizing member, provided at an opposite side to a side of the actuator body at which the driver element is provided, for pressing the actuator body to one of the fixed body and the movable body on which the driver element abuts; a base member to which the actuator body is coupled; and a supporting member for elastically supporting the actuator body relative to the base member, wherein the supporting member is a plate spring member provided in parallel to the one side surface of the actuator body, is connected to the one side surface of the actuator body, and has a larger spring constant in a driving direction in which the driver element outputs driving force than a spring constant in a pressing direction in which the pressurizing member presses the actuator body.