| 摘要 |
PROBLEM TO BE SOLVED: To provide a turntable system for magneto-optical disk provided with an automatic aligning function of a disk without increasing the number of components. SOLUTION: A turntable 40 of the turntable system for magneto-optical disk is an insert molding article consisting of an insert component that is a back yoke 42 internally with a boss 42a to which a rotor shaft 4 is press-fit and a guard plate 42b placed on a clamp magnet 43, and of a disk hole fit section 40b and a disk face placing section 40c around it that are made of a resin material and having engagement stood upright pieces 43, 44, 45 that are stood upright at an inner circumferential side of ten disk face placing section 40c at angular positions apart by 120 degrees each around the disk face placing section 40c as resin molding sections. The engagement stood upright pieces 43, 44, 45 can be tilted elastically in radial directions and pressed into contact with the inner circumferential face of a disk hole 30a of the magneto- optical disk 30. Thus, the engagement stood upright pieces 43, 44, 45 fill the inner circumferential face of the disk hole 30a without a gap to automatically align the disk 30 at the same time.
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