| 摘要 |
PURPOSE:To constitute a part of a motor with an optical disk by forming a fitting hole in the central part of a disk main body, and providing a rotor magnet setting the shaft core of the disk at a part except for the signal plane of a disk surface as a fulcrum. CONSTITUTION:The disk main body 2 is constituted of a transparent plastic substrate 3, and a digitized acoustic signal is engraved on the signal plane 3b on the opposite plane of the surface 3a, and furthermore, a reflecting layer of light and a hard transparent protection layer 4 on the layer are provided. A circular fitting hole 5 is formed in the central part of the disk main body 2, and the rotor magnet 6 setting the shaft core of the disk at the part except for the signal plane 3b on the surface 3a of the disk main body 2 as the fulcrum is provided. The rotor magnet 6 is a thin doughnut shape permanent magnet. In such a way, it is possible to constitute a part of the motor with the optical disk. |
