| 摘要 |
When storage of an optical disc in which information has been recorded is started, a pair of rollers rotate while holding the optical disc inserted through an insertion/ejection slot of a body of an optical disc device, so that the rollers convey the optical disc to the inside of the body. On this occasion, circumferential edge sensing units provided in the inside of the body sense a circumferential edge of the inserted optical disc continuously to thereby sense the outer diameter, shape and insertion state of the inserted optical disc. The optical disc is ejected when decision is made that there is abnormality.
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