| 摘要 |
PURPOSE:To achieve sure rotation transmission by providing a projecting part to at least one of two disk hubs, and inserting this into a hole formed near the center hole of a disk. CONSTITUTION:A flexible disk 1 like a magnetic sheet disk is clamped near its center part by disk hubs 2 and 3 from above and below. At the center part of the disk hub 2, a circumferential part 4 is formed in one body and this circumferential part 4 is fitted in the center hole 5 of the disk 1. The facing surface parts 6 and 7 of the disk hubs 2 and 3 serve to clamp te circumferential surfaces of the center hole 5 of the disk 1 from above and below during assembly. A pinlike projection 8 formed on the surface part 6 of the disk hub 2 in one body is inserted into and engaged with a hole part 9 provided in the surface near the center hole 5, and the tip of the projection 8 is fitted in a hole 10 formed at the surface part 7 of the other disk hub 3. |
