| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrasonic motor which can make a driven body generate arbitrary movement. <P>SOLUTION: The ultrasonic motor 100 has a base 11, a horn 12, a head 13, and piezoelectric actuators 14a, 14b, 15a, and 15b provided at opposed faces of the base 11. For example, the ultrasonic motor makes a metal ball 16 rotate clockwise or counterclockwise about its vertical axis by keeping the ultrasonic motor 100 in a vertical attitude, and putting the metal ball 16 as a driven body on a head 13 by driving the piezoelectric actuators 14a, 14b, 15a, and 15b at specified frequencies. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
