BRUSHLESS MOTOR AND DISK DRIVE UNIT

摘要

PROBLEM TO BE SOLVED: To provide a brushless motor which exhibits high fastening strength and can be thinned and reduced in size. SOLUTION: An upper end portion 42 to be fastened with the rotor holder 60 of a shaft 40 is formed into an R-shape with its height gradually increasing in the axial direction as the upper end portion proceeding to the rotation center axis A. A cylindrical insertion part 70 is provided at the center of the disk part of a rotor holder 60. A movement regulating mechanism 76 which projects in the axial direction so as to cover the shaft 40 is provided to the upper end part of the insertion part 70. The movement regulation mechanism 76 has a coming-out preventing structure to the shaft 40, increasing the fastening strength between the shaft 40 and the rotor holder 60. COPYRIGHT: (C)2008,JPO&INPIT