| 摘要 |
<p>Provided is a linear drive ultrasonic motor capable of reliably guiding a driven member while reducing the transfer resistance and friction resistance of the driven member and capable of being reduced in size. The ultrasonic motor is provided with at least an ultrasonic vibrator which comprises a piezoelectric element, a driven member which is driven by force of friction with the ultrasonic vibrator, a pressing member which presses the ultrasonic vibrator to cause the friction force between the ultrasonic vibrator and the driven member, a spherical rolling member which is in contact with the driven member, and a base member which movably supports the driven member with the rolling member interposed therebetween. The rolling member is in contact with the driven member at a first contact point and in contact with the base member at two second contact points. The lengths of two straight lines connecting the first connection point and the two second connection points respectively are nearly equal.</p> |
