Patent ID: 7712174
Filing Date: 2010-05-11
Classification: A61C,H02K

Abstract:
1. A rolling driving actuator comprising: a moving object having a shaft pivoted to be able to rotate around an axis thereof, a yoke fixed on the shaft and flat plate shaped permanent magnets attached to adjoin the yoke around the axis of the shaft and magnetized in thickness direction thereof; and a tubular shaped stator having a coil wound around the axis of the shaft to enclose the moving object, and stationary yokes made of a magnetic material and disposed to face an outermost peripheral portion of the yoke and the permanent magnet with a predetermined clearance in a direction perpendicular to the axis of the shaft; and wherein each permanent magnet is fixed on the yoke in the same orientation so that all outer faces of the permanent magnets have the same polarity; and the moving object being driven in rolling driving in a predetermined angle region around the axis of the shaft by supplying alternating current to the coil.