Patent ID: 6809461
Filing Date: 2004-10-26
Classification: H02N

Abstract:
A drive unit mounted on a chassis for driving a movable portion including a vibrating unit that expands or contracts in a predetermined direction upon being applied with a predetermined voltage, the drive unit comprising:a movable shaft unit fixed at one end to an end of the vibrating unit and supported at an other end and being moved in the predetermined direction of expansion or contraction of the vibrating unit; an engaging unit for frictionally engaging the movable portion with the movable shaft unit; a fixing unit fixed at an end of the vibrating unit opposite to the end of the vibrating unit to which the movable shaft unit is fixed; a drive control unit for applying a driving voltage for differentiating a speed of expansion and contraction of the vibrating unit; and a damping member for surrounding and supporting the fixing unit in a hole formed in the chassis and for attenuating vibrations of the chassis caused by the driving voltage applied to the vibrating unit and for attenuating vibrations transmitted by the chassis from outside of the drive unit.