| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a linear-drive type ultrasonic motor capable of attaining high drive efficiency, while realizing size reduction and high output. <P>SOLUTION: The linear-drive type ultrasonic motor includes at least: an ultrasonic oscillator having a piezoelectric element; a driven member relatively driven by a frictional force to the ultrasonic oscillator; a pressure member pressing the ultrasonic oscillator to generate a frictional force between the ultrasonic oscillator and the driven member; a plurality of spherical rolling members abutted on the driven member; and a support base member movably supporting the driven member through the rolling member, wherein the ultrasonic oscillator is provided with two drive pieces abutted against the driven member, and the plurality of rolling members are disposed at an interval such that the driven member does not enter between the two drive pieces in the driven direction. <P>COPYRIGHT: (C)2011,JPO&INPIT |
