| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for having positional stability of a magnetic suction plate and suppressing the manufacturing cost while utilizing an adhesive in a structure in which the magnetic suction plate is fixed to a stator of a spindle motor.SOLUTION: In a base plate 2, an annual groove 14 is provided which holds an annual magnetic suction plate 13, the annual magnetic suction plate 13 is fixed to the groove 14 by adhesion, a plurality of projections 13a, 13b are provided on respective outer peripheral side and inner peripheral side of the magnetic suction plate 13, and the projections 13a, 13b are fitted to a wall surface of the groove 14 on the outer peripheral side and the inner peripheral side of the magnetic suction plate 13. |
