Disk device

A disk device comprising:

• a housing including a base with a bottom wall and a cover opposing the bottom wall;
• a disk-shaped recording medium provided to be rotatable in the housing;
• a head which performs information processing on the recording medium;
• an actuator assembly including an actuator block supported to be rotatable by a pair of bearings on a support shaft extending in a first direction and provided to stand upright on the bottom wall, a suspension assembly extending from the actuator block in a direction intersecting the support shaft, on which the head is mounted, and a support frame extending from the actuator block;
• and
• a coil motor which pivots the actuator assembly,
• wherein
• the coil motor comprises a lower yoke provided on the bottom wall, a lower magnet provided on the lower yoke, an upper yoke opposing the lower yoke at an interval therebetween in the first direction, an upper magnet provided on the upper yoke and opposing the lower magnet at an interval in the first direction, and a voice coil fixed to the support frame of the actuator assembly and located between the lower magnet and the upper magnet, and the upper magnet and the lower magnet are different from each other in thickness in the first direction,
• the actuator assembly includes a first center axis passing through a center between the pair of bearings and perpendicular to the support shaft, and
• the voice coil includes a coil center axis extending parallel to the first center axis while passing through the center in the first direction, and the coil center axis is disposed at a height position offset in the first direction with respect to the first center axis.