Cover-side terminals of a motor cover are electrically press-fitted over and fixed to motor terminals of a motor case at a first position being separate from a base portion by a first length in an extending direction of the motor terminals. Meanwhile, a fixing portion of the motor cover is press-fitted over and fixed to a protruding portion at a second position being separate from the base portion by a second length being different from the first length in the extending direction of the motor terminals of the motor case. In this case, for example, the second length is longer than the first length.