| 摘要 |
An optical disk drive includes a turntable 2, a clamp 3 and a motor 4 for driving the turntable 2 to rotate. An optical disk Ds is held in such a way that it is sandwiched between the turntable 2 and the clamp 3. The turntable 2, which is made of a magnetic metal plate by a drawing process, includes an optical disk placement portion 21 for placing an optical disk and a protruding portion 22 that protruded from the center of the optical disk placement portion 21 in the axial direction.
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