Patent ID: 7605507

Claim:
A motor apparatus comprising: a motor main body provided with a rotary shaft; a decelerating portion assembled in the motor main body, the decelerating portion having a worm shaft driven by the rotary shaft, and the worm shaft being coaxially arranged with the rotary shaft; a coupling portion provided in one end of the rotary shaft; a drive rotor having a coupled portion to which the coupling portion is loosely fitted, the drive rotor being integrally rotatable with the coupling portion; a driven rotor integrally rotating with the worm shaft, the driven rotor being engageable with the drive rotor with respect to a rotating direction of the drive rotor; a coupling mechanism including the drive rotor and the driven rotor; and a restricting member fixed to the rotary shaft so as to be integrally rotatable, the restricting member being contactable with the drive rotor in the case that the drive rotor is inclined with respect to the rotary shaft, wherein when the drive rotor is not inclined with respect to the rotary shaft, the restricting member does not contact the drive rotor, wherein the restricting member is a rotation detected portion fixed to the rotary shaft and the rotation detected portion integrally rotates with the rotary shaft for detecting a rotation of the rotary shaft.