| 摘要 |
<P>PROBLEM TO BE SOLVED: To drive a driven body efficiently by an actuator employing a piezoelectric element. <P>SOLUTION: The actuator 1 comprises: a first piezoelectric element 15; a resilient body 10 generating a bending vibration as the first piezoelectric element 15 elongates/contracts; a second piezoelectric element 17 elongating/contracting while having a component in the direction perpendicular to the displacing direction of the resilient body 10; a member 16 arranged in the surface region of the resilient body 10 where displacement takes place through bending vibration and supporting the second piezoelectric element 17 to elongate/contract freely; and a member 18 arranged on the second piezoelectric element 17 to displace in the elongating/contracting direction as the second piezoelectric element 17 elongates/contracts and touching the objective driven body 30 in the displacing direction of the resilient body 10 at least during bending vibration. With such an arrangement, the actuator 1 drives the driven body 30 efficiently. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
