| 主权项 |
1. A rotating device, comprising:
a hub on which a recording disk is to be mounted; a base rotatably supporting the hub via a fluid dynamic bearing; a core fixed to the base, the core having a ring portion and a plurality of teeth that radially extend from the ring portion; a plurality of coils wound around the plurality of teeth; a magnet fixed to the hub, the magnet being magnetized for driving with a plurality of magnetic poles along a circumferential direction and arranged to radially face the plurality of teeth; and a suction plate fixed to the base, the suction plate being arranged to face the magnet in a direction along a rotational axis of the hub and made of magnetic material, wherein the suction plate is arranged so that a minimum distance between the suction plate and the rotational axis of the hub is greater than a minimum distance between the magnet and the rotational axis of the hub, wherein a first projection area created by projecting the magnet onto a plane that is perpendicular to the rotational axis of the hub partially overlaps a second projection area created by projecting the suction plate onto the plane, wherein a maximum width, in a radial direction, of a part of the second projection area that overlaps the first projection area is less than a maximum width, in the radial direction, of the rest of the second projection area, and wherein a surface of the base facing the hub includes: a flat surface that faces at least a part of the plurality of coils in the direction along the rotational axis of the hub; and a recess provided radially outside of the flat surface with respect to the rotational axis, wherein the suction plate is fixed to the base by pressing an outer side of the suction plate into the recess. |
