| 摘要 |
PURPOSE:To decrease the number of parts of a whole device and lower the cost of the device by driving a driving section that rotates a discoid recording medium and a driving section of clamping action of the recording medium by the same power source. CONSTITUTION:When the holding plate 40 of a disk 6 housed in a cartridge 30 descends to a specified position, it is positioned by a positioning member 43 using inner diameter of the disk, and mounted to a turntable 5 attached to the rotation shaft 47 of a driving section 1 coupled in multistage with a pulley 8a, a clutch 3, a gear head 2 and a clutch 4. The member 43 is raised up by an ordinary spring 46 to lessen variance of inner diameter and parts of the disk 6. Further, a projected part 44 attached to a clamping member 7 makes positioning by a centering member 49. When releasing clamping after detecting information, the clutch 4 is turned of and the clutch 3 is turned on to operate the clamping mechanism, and the driving section 1 is reversed by a spindle motor etc., and operation reverse to clamping is performed.
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