Patent ID: 9621074
Date: 2017-04-11
CPC Classifications: H02N

Claim:
1. An inertial drive actuator comprising: a shift unit that generates a small shift in a first direction and in a second direction opposite to the first direction; a vibration base plate that moves to and fro with the small shift of the shift unit; a mover disposed on a flat surface of the vibration base plate and having a first magnetic field generating unit; a first yoke that concentrates magnetic flux generated by the first magnetic field generating unit at predetermined positions in the N and S poles; and a second yoke disposed on a side of the vibration base plate facing away from the mover, wherein the first yoke and an end portion of the second yoke are opposed to each other at a position outside the vibration base plate, thereby mechanically restricting movement of the mover with respect to a direction perpendicular to the driving direction, and a frictional force acting between the mover and the vibration base plate is controlled by controlling a magnetic field generated by the first magnetic field generating unit to drive the mover; wherein: