ELECTRIC POWER STEERING DEVICE

PROBLEM TO BE SOLVED: To provide an electric power steering device capable of reducing its weight while blocking the electromagnetic wave from the outside, of forming any complicated shape or the like, of reducing the number of components, and of easily forming a seal structure. SOLUTION: In the electric power steering device 2, the steering torque applied to a steering wheel is detected by a torque sensor, the auxiliary steering torque corresponding to the detected steering torque is generated from an electric motor via a circuit substrate stored in a sensor housing and covered by a sensor housing cover, decelerated by a deceleration mechanism, and transmitted to an output shaft of a steering mechanism. The sensor housing cover 10 is formed of a conductive resin. The circuit substrate executes the signal processing of the torque sensor or the signal processing of the torque sensor, and the control of the electric motor. COPYRIGHT: (C)2009,JPO&INPIT