An optical disc equipped with a hub having a centering hole into which a spindle shaft of a disc driving mechanism is inserted, wherein a centering hole portion 6 of the hub is provided with a centering hole reinforcing means 9 made of a material excellent in abrasion resistance and smoothness or a member having a central hole is formed of a resin excellent in abrasion resistance and smoothness. <IMAGE>
申请公布号
DE69119638(D1)
申请公布日期
1996.06.27
申请号
DE1991619638
申请日期
1991.03.21
申请人
SONY CORP., TOKIO/TOKYO, JP
发明人
TAKAHASHI, KENJI, C/O SONY MAGNETIC PRODUCTS INC., SHINAGAWA-KU, TOKYO, JP