| 摘要 |
PROBLEM TO BE SOLVED: To provide technology by which whistle sound of an optical disk can be reduced without changing structure of a tray , in an optical disk device. SOLUTION: A sheet member having a circle arc being almost concentric state with the optical disk at an inner diameter part is provided at a position which is opposing to an outer periphery side plane part of the optical disk and which is almost continued to a plane part of the tray being in a standby state, a discontinuous point of an air stream in the optical disk outer periphery side plane part is prevented, and the air flow is guided continuously by the plane part of the tray and the plane of the sheet member. COPYRIGHT: (C)2005,JPO&NCIPI
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