VIBRATION ACTUATOR

摘要

A vibration actuator (10) is provided with a stator (13), a roller (30) which is in contact with the stator (13) and which is supported by the stator (13), a rotating shaft (34) which supports the roller (30), a vibration device which is connected to the stator (13) and which rotates the roller (30) by generating ultrasonic vibration in the portion where the stator (13) and the roller (30) are in contact with each other, and a preloading mechanism which is connected to the rotating shaft (34) and which presses the roller (30) against the stator (13) by pressing the rotating shaft (34) toward the stator (13). The preloading mechanism is provided with a connection member (37) which has a pair of connection sections (38) connected to the rotating shaft (34) on both sides of the roller (30) in the axial direction thereof. The stator (13) is provided with a space for receiving the connection member (37).