Patent ID: 7880365
Filing Date: 2011-02-01
Classification: G02B,H02N

Abstract:
1. An actuator comprising: a pair of driving portions spaced apart from each other, the pair of driving portions being constituted from two independent plates; a movable portion provided between the pair of driving portions; a pair of supporting portions for supporting the pair of driving portions and the movable portion; a pair of first elastic connecting portions which respectively connect the pair of driving portions to the pair of supporting portions so that each of the driving portions can rotate with respect to the supporting portions, wherein each of the pair of first elastic connecting portions is constructed from two connecting members each spaced from the rotation central axis with a predetermined distance; and a pair of second elastic connecting portions which respectively connect the movable portion to the pair of driving portions so that the movable portion can rotate in accordance with the rotation of the pair of driving portions, wherein each of the pair of second elastic connecting portions is constructed from a connecting member coaxially provided with respect to the rotation central axis wherein each of the pair of driving portions rotates around a rotation central axis of the actuator by application of an alternating voltage, so the movable portion rotates around the rotation central axis of the actuator, and wherein the two connecting members of each of the pair of first elastic connecting portions and the connecting member of each of the pair of second elastic connecting portions have the same shape and size as each other.