Patent ID: 7161275

Claim:
An actuator of the type employing a two-degree-of-freedom vibration system, the actuator comprising: a pair of first mass portions; a second mass portion provided between the pair of first mass portions; a pair of supporting portions for supporting the pair of first mass portions and the second mass portion; a pair of first elastic connecting portions which respectively connect the first mass portions to the supporting portions so that each of the first mass portions can rotate with respect to the supporting portions, wherein each of the first connecting portions comprises a pair of elastic connecting members which are arranged so as to have a substantially V-shape form; and a pair of second elastic connecting portions which connect the second mass portion to the respective first mass portions so that the second mass portion can rotate with respect to the first mass portions, wherein each of the second elastic connecting portions comprises a pair of elastic connecting members which are arranged so as to have a substantially V-shape form; wherein each of the first mass portions is driven by the application of an alternating voltage, causing the second mass portion to rotate.