Patent ID: 7528527
Filing Date: 2009-05-05
Classification: H02N

Abstract:
1. A driving device comprising: at least one drive source configured and arranged to generate a driving force; at least one driving unit operatively coupled to the drive source to move with a reciprocating motion between first and second directions by the driving force from the drive source, the at least one driving unit having a first member with a first cam surface and a second member with a second cam surface with at least one of the first and second cam surfaces including an incline plane that is inclined with respect to the first and second directions; and a driven member frictionally engaged with the second member of the driving unit to move in the first direction in response to the reciprocating motion of the driving unit, the driving unit being further arranged with respect to the driven member to apply a first pressing force acting on the driven member in a direction substantially perpendicular to the first and second directions when the first cam surface contacts the second cam surface to cause the second member to contact the driven member to generate the first pressing force when the driving unit moves in the first direction, and to apply a second pressing force that is smaller than the first pressing force acting on the driven member in a direction substantially perpendicular to the first and second directions when the driving unit moves in the second direction.