| 摘要 |
<p>A disc cartridge comprising a disc sheet (6) and a hub assembly (7) formed by an upper half member (7a) and a lower half member (7b), one of which has a positioning projection (14), and the disc sheet (6) is provided with a hole (17) engageable with the positioning projection (14) so that the disc sheet can be placed in a correct position by fitting the hole (17) of the disc sheet (6) with the positioning projection (14).</p> |
