| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration type actuator capable of allowing a mover fitted to a driver with a screw to move forward by resonating the driver using a driving element provided on a support. <P>SOLUTION: A support 5 supporting the bottom end of a vibration shaft 2 is provided with a plurality of piezoelectric elements 6, 7, 8, 9. Vibration to be imparted to the support 5 is imparted to the vibration shaft 2 via the support 5 by the electrostrictive effect of the piezoelectric elements. The phase of a drive signal to be imparted to the piezoelectric elements is changed, and thus, the driver 3 fixed on the vibration shaft 2 can perform circular motion. A male screw portion 13 is formed on the driver 3, and a female screw portion 14 screwing with the male screw portion 13 is formed on the internal circumferential surface of a center hole 4a of the mover 4. The mover 4 is rotated by the circular motion of the driver 3, and the mover 4 is moved in a shaft direction in response to the locus of the screw. <P>COPYRIGHT: (C)2009,JPO&INPIT |
