| 摘要 |
PURPOSE:To shorten the rising time during which a disk is changed to a steady revolution state from a stop state by providing an auxiliary drive mechanism which revolves temporarily a spindle concurrently with or before and after the start of a primary drive mechanism. CONSTITUTION:A lever 11 is supported rotatably by a support member 10 of a substrate 1, and a plunger 9 is connected to an end of the lever 11 via a pin 12. While a lever 14 is connected to the other end of the lever 11 via a pin 15. The lever 14 contains a pawl part 16 opposite to a gear 5 fitted into a spindle 4, and this part 16 is energized upward by a spring 20. When an electric power supply is applied, a disk 6 is revolved. At the same time, a solenoid 8 is energized to revolve levers 11 and 14. Thus the part 16 interlocks the gear 5 to turn the spindle 4 clockwise. This backs up the revolutions of the disk 6. As a result, it is possible to shorten remarkably the rising time during which the disk 6 has the steady revolution. |
