To realize simultaneously the reduction of a manufacturing cost and an improvement in a motor efficiency.

The end plate 38 is used for the rotor of the motor so that the axial movements of a laminated core 16 and a magnet 19 are regulated by pinching the laminated core 16 and the magnet 19 from both axial sides. A notched part 39 is formed on the outer peripheral side of the end plate 38 so that the a part 40 except the notched part is disposed on the magnet and between the magnets. This end plate 38 is formed so that the diameter of an inscribed circle which contacts the bottom of the notched part 38 at the axial center of the rotor shaft as a center becomes a diameter or less of the inscribed circle which contacts the inside face of the magnet 19 at the axial center of the rotor shaft as a center. Further, the end plate has a first plate formed circularly to axially press the outer peripheral side of the laminated core 16 and the magnet 19, and a second plate for axially pressing the inner peripheral side of the laminated core 16 and the first plate.

COPYRIGHT: (C)2006,JPO&NCIPI