Patent ID: 7719157

Claim:
A motor comprising: a motor case; a rotor including an outer peripheral surface; a stator including an inner peripheral surface spaced a predetermined distance from the outer peripheral surface of the rotor in opposed relation thereto, the stator being press-fitted into the motor case; and an engagement structure provided between an outer peripheral surface of the stator and an inner peripheral surface of the motor case for engaging a part of the stator with a part of the motor case to prevent the stator from rotating relative to the motor case, wherein the engagement structure comprises recess portions and protecting portions for engagement in the recess portions, wherein the recess portions are formed at one of the inner peripheral surface of the motor case and the outer peripheral surface of the stator, and the projecting portions are formed at the other one of the inner peripheral surface of the motor case and the outer peripheral surface of the stator, and wherein a height of each of the projecting portions is greater than a depth of each of the recess portions, such that only distal ends of the projecting portions and inner bottom faces of the recess portions are press-fitted with each other.