| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor in which external force does not interfere with a magnetic disk drive by solving a problem that a rotary body supported by a fluid bearing is made to fall off from the bearing by external force such as vibrations or shock in a brushless motor used for a magnetic disk drive. SOLUTION: In order to prevent a rotary shaft 2 from falling off from a sleeve 3, the sleeve 3 and a fall-off preventive member 9a are fastened by a screw, thereby preventing a rotary body from falling off due to external force such as vibrations or shock to make it feasible to stably rotate a motor. Further, since the fall-off preventive member 9a is installed by a screw mechanism a subtle adjustment for the position of the fall-off preventive member 9a can be made, so that contact between the rotary body and the fall-off preventive member 9a may be prevented. |
