| 摘要 |
PURPOSE:To decrease the vibrations transmitted to a record disk from a turntable by setting the voltage of a sealed hollow part at an extremely low level and at the same time to prevent the vibrations of the disk with correction of warps by providing a sucking function to give a close contact of the disk onto the turntable. CONSTITUTION:When a vacuum pump is actuated, the air within a sealed space formed by a record disk and sealing members 22 and 23 for sucking is discharged and decompressed through an air discharging route. Thus the disk is sucked and fixed to the upper surface of a turntable disk 8 to correct the warps of the record disk. At the same time, the air is discharged through a small hole 8d of a turntable 6 to decompress a hollow part 9. As a result, the upper side of a turntable base part 7 is stuck perfectly to the lower surface of the disk 8 via O-rings 12 and 13. Thus the part 9 is set at an extremely low level of voltage to be set virtually in a vacuum state. Therefore the vibrations generated by revolutions of a motor are not transmitted easily to the disk 8 owing to existence of the part 9 of a vacuum state. In addition, the disk 8 is put on the base 7 in a small area. This can prevent greatly the vibrations of the turntable 6 to the record disk. |
