| 摘要 |
PURPOSE:To enable accurate centering of rotation axis of a diskette by providing plural projections on the inner periphery of a disk rotation hole. CONSTITUTION:A rugged rim is formed on inner periphery of the rotation axis hole 2 of a flexible disk 3 and blanked to provide plural projections 8. When a hub 6 is pressed into the axis hole, the projections 8 are bent slightly and come into elastic contact with the hub. Thus, the variance of dimensions of the axis hole 2 and hub 6 is absorbed, and the disk 3 comes into close contact with the hub 6 and pivotally supported in a body. Further, by pressing in the hub 6 from facial direction of the disk 3, the disk is always pivotally supported at a specified position accurately.
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