| 摘要 |
<p>Disclosed is a piezoelectric actuator which has an improved driving force or drive efficiency. Specifically disclosed is a piezoelectric actuator which is provided with: a plurality of piezoelectric members (20) which have a first piezoelectric element (21) capable of being displaced in a first direction and a second piezoelectric element (22) capable of being displaced in a second direction intersecting the first direction, and which are divided into a plurality of groups; a relative movement member (12) which has a contact surface (12A) that is in contact with the piezoelectric members (20), and which moves relatively to the piezoelectric members in the first direction; and a drive unit (30) which, when piezoelectric members (20A) of one group among the plurality of groups are in contact with the contact surface, drives the first piezoelectric element of the piezoelectric members (20A), thereby inducing the relative movement of the relative movement member in the first direction, and which, when driving the first piezoelectric element of the piezoelectric members (20A), drives the second piezoelectric element of piezoelectric members (20B) of another group, thereby separating the piezoelectric members of the another group from the contact surface.</p> |
