| 摘要 |
<p>A disk device, comprising a rotatable bar-shaped loose-fitted means which is loosely fitted to the inner diameter of a disk (R) and a supporting means which forms a support part for supporting a part of the disk on the peripheral edge part of the loose-fitted means, wherein the supporting means is moved in the rotating axis direction of the loose-fitted means according to the rotation of the loose-fitted means.</p> |
