| 摘要 |
PURPOSE:To prevent slippage between an optical information recording disk and a disk driving system from being generated at the time of applying large torque and to accelerate the start-up speed of a spindle and the rotary driving speed of the optical information recording disk by engaging them mechanically. CONSTITUTION:A spindle hole 5c to which the spindle provided in a disk driving device is inserted is provided in the central part of a substrate 1, and also, an engaging means 4 possible to be engaged with a disk engaging means formed integrally with the spindle is formed at the outer periphery of the hole. Thereby, it is possible to engage the optical information recording disk with the spindle mechanically. In such a way, so slippage between them is generated even when the large torque is applied, and the optical information recording disk can be started up at high speed and driven rotatably at high speed, and it is possible to accelerate data transfer speed and to reduce a recording/reproducing error. |
