| 摘要 |
<p>A disk includes a substrate (1) of the disk provided with a recording medium to and from which information signals are recorded and/or reproduced, and a disk hub (2) provided with a metal plate (4) formed with an engaging projection (10) and a supporting member (5) having a mating engaging section (18) engaged by the projection (10) of the metal plate (4), the supporting member (5) being secured to the central portion of the substrate (1) of the disk. According to the present invention, a retaining section (21) is provided to the major surface or to the perimeter of the supporting member (5), and a holding member is engaged in the retaining section to prevent the supporting member (5) from being turned with respect to the substrate (1) of the disk when the metal plate (4) is turned in a prescribed attachment direction so as to be attached to the supporting member (5).</p> |
