Patent ID: 7443058
Filing Date: 2008-10-28
Classification: A61C,H02K

Abstract:
1. An actuator capable of reciprocal linear driving and rolling driving comprising a reciprocal linear driving unit and a rolling driving unit which are arranged to adjoin in axial direction of a shaft; the shaft being pivoted to be enabled reciprocal linear driving in the axial direction thereof and pivoted to be enabled rolling driving around the axis of the shaft in a predetermined region; the reciprocal linear driving unit comprising: a first moving object having the shaft and first permanent magnets each magnetized so that polarities of both end portions in the axial direction of the shaft are different and fitted to and fixed on the shaft; and a first stator having a coil disposed to face end faces of the first permanent magnets parallel to the axial direction of the shaft with a predetermined clearance and generating magnetic field when current is supplied; the rolling driving unit comprising: a second moving object having the shaft, a second yoke fixed on the shaft and at least one second permanent magnet attached to adjoin the second yoke around the axis of the shaft; and a tubular shaped second stator having a second coil wound around the axis of the shaft to enclose the second moving object, and second stationary yokes disposed to face an outermost peripheral portion of the second yoke and the second permanent magnet with a predetermined clearance in a direction perpendicular to the axis of the shaft; and by supplying an alternating current to the first coil and/or the second coil, the first moving object being driven reciprocally and linearly in the axial direction of the shaft and/or the second moving object being driven rollingly around the axis of the shaft in a predetermined angle region.