| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration type actuator capable of allowing a mover to move forward with a large force by vibrating a driver out of the driver and the mover fitted to each other via a screw portion. <P>SOLUTION: A plurality of piezoelectric elements 6, 7, 8, 9 are provided on a vibration shaft 2, the vibration shaft 2 is bent by an electrostrictive effect of the piezoelectric elements and vibrates, the phase of a driving signal to be applied to the piezoelectric element is changed, thereby allowing the driver 3 fixed on the vibration shaft 2 to perform an orbiting operation. A male fitting portion 13 is formed on the driver 3, and a female screw portion 14 screwing with the male fitting portion 13 is formed on the internal circumferential surface of a center hole 4a of the mover 4. Thus, the mover 4 is rotated by the orbiting operation of the driver 3, and the mover 4 moves in a shaft direction in response to the locus of the screw. <P>COPYRIGHT: (C)2009,JPO&INPIT |
