Patent ID: 8018101

Claim:
A motor comprising: a rotor having a rotation shaft; a stator which is disposed on an outer peripheral side of the rotor; an output side bearing which supports an end part on an output side of the rotation shaft in a radial direction and an axial direction; a frame which is provided with a bearing holding part for holding the output side bearing and which is fixed to the stator; and an urging member which is attached to the bearing holding part for urging the output side bearing to an opposite-to-output side; wherein the bearing holding part is formed with a bearing hole which penetrates through the bearing holding part and on which the output side bearing is disposed, and the output side bearing is disposed on the bearing hole in a movable state in the axial direction of the rotation shaft; the urging member is a flat spring; the flat spring is attached to an output side face of the bearing holding part and is provided with a slipping-out preventive part for preventing coming-off of the output side bearing from the bearing hole; a through hole is formed at a center portion of the flat spring so as to penetrate through the flat spring; the slipping-out preventive part comprises a plurality of protruded parts which is protruded toward a center side of the flat spring from an edge portion of the through hole for preventing the output side bearing from coming-off toward an output side; the output side bearing is provided with a plurality of projecting parts projecting toward the output side and the protruded part is disposed between the plurality of the projecting parts; and the flat spring is provided with a bearing abutting part which is protruded toward the center side of the flat spring from the edge portion of the through hole to abut with and urge the output side bearing, and the bearing abutting part is disposed between the plurality of the projecting parts, and a difference between a distance in a circumferential direction between the projecting parts, which are disposed on both sides of the protruded part in the circumferential direction of the rotation shaft, and a width of the protruded part in the circumferential direction is smaller than a difference between a distance in the circumferential direction between the projecting parts, which are disposed on both sides of the bearing abutting part in the circumferential direction of the rotation shaft, and a width of the bearing abutting part in the circumferential direction.