Patent ID: 7683523
Filing Date: 2010-03-23
Classification: H01L

Abstract:
1. An ultrasonic actuator comprising: an actuator body having a piezoelectric element and performing a bending vibration and a longitudinal vibration; and a driver element which is attached to a side surface of the actuator body normal to a vibration direction of the bending vibration, and outputs a driving force by making an orbit motion in a plane including the vibration direction of the bending vibration and a vibration direction of the longitudinal vibration in response to the vibrations of the actuator body, wherein the driver element is provided with an attachment surface, and is attached to the side surface with the attachment surface in surface contact with the side surface, and a width of the attachment surface in the vibration direction of the longitudinal vibration is smaller than a maximum width of the driver element in the vibration direction of the longitudinal vibration.