Abstract
A vibratory actuator is provided in which a movable body can be stably driven even when a groove is formed in an abutment body by the friction between the driver element and the abutment body. An ultrasonic actuator ( 2 ) includes an actuator body ( 4 ) which performs a longitudinal vibration and a bending vibration, and a driver element ( 8 a, 8 b ) which is provided on one of side surfaces of the actuator body ( 4 ) which is a mounting surface ( 40 a ), and performs an orbital motion in accordance with the vibrations of the actuator body ( 4 ) to output a driving force. The driver element ( 8 a, 8 b ) includes a first driver element ( 8 a ) and a second driver element ( 8 b ) which are provided on the mounting surface ( 40 a ) at different positions in a longitudinal direction of the actuator body ( 4 ). The first driver element ( 8 a ) and the second driver element ( 8 b ) are located at different positions in a thickness direction of the actuator body ( 4 ).
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