Patent ID: 8390912

Claim:
An actuator, comprising: a movable plate; a supporter to support the movable plate; a pair of linking portions to link the movable plate and the supporter so as to allow the movable plate to rotate relative to the supporter; and a piezoelectric element to rotate the movable plate, wherein the piezoelectric element elongated and contracted by an energization twists the pair of linking portions to rotate the movable plate; each of the pair of the linking portions includes: an axial member extending from the movable plate, a driving member connected to the axial member, and a pair of elastic members capable of being elastically deformed connected to opposing ends of the driving member, each elastic member having a first end connected to the driving member and a second end that is closer to the movable plate than the first end, each elastic member extending from the first end axially back toward the movable plate to the second end, wherein each of the pair of elastic members faces each other across a rotation center axis of the movable plate.