| 摘要 |
A disk stabilizing plate is disposed oppositely below a thin disk for the purpose of allowing the thin disk to rotate stably, in a recording and reading device that uses a flexible thin disk for recording and reading. The disk stabilizing plate has a movable disk support member, relative to the prescribed rotation condition of the thin disk, that is caused to protrude upward from the surface of the disk stabilizing plate to touch and support the thin disk, or that is drawn downward from the surface of the disk stabilizing plate from the state touching and supporting the thin disk so that the state wherein the thin disk is touched and supported is terminated.
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