| 摘要 |
A disk drive unit is provided which is capable of restraining a disk from being tilted by the weight of the disk itself, using a simple configuration. In this disk drive unit, a turntable is provided below a disk, and a pressure member is provided above the disk. The turntable includes a disk mounting portion which comes into contact with the disk. The pressure member includes a pressure portion which presses the lower surface of the disk and rotates together with the disk. An aligning ring presses the interior-end part of the disk from below. The disk mounting portion is located on the inside in the radius direction from the pressure portion.
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