Patent ID: 7808153

Claim:
An inertial drive actuator comprising: a fixed member; a displacement generating unit of which, one end is fixed to the fixed member, and the other end reciprocates; a vibration substrate which is connected to the displacement generating unit, and which reciprocates with respect to the fixed member along with the reciprocating movement of the displacement generating unit; a moving body which is disposed on the vibration substrate, and which is made of a magnetic body which moves with respect to the vibration substrate due to inertia with respect to the reciprocating movement of the vibration substrate; a coil which is provided on the moving body; and a driving unit which applies a voltage for causing a reciprocating movement of the displacement generating unit, and which applies an electric current for controlling a frictional force which is generated between the vibration substrate and the moving body due to making act an electromagnetic force by applying an electric current to the coil.