| 摘要 |
PURPOSE:To attain a disc with high reliability in which exfoliation by a hub and a filter to a bonding surface is prevented, by pressing and fixing the filter constituting body on the hub with an elastic member, relating to a magnetic disc having a self-circulating type filter ststem. CONSTITUTION:A filter clamp 13 is touched to the filter 7 abutted to the outer side of a window 16 of the hub 1 to widen the pressing area and an elastic ring 14 is inserted to a guide groove 12 of the hub 1. In this state, the ring 14 touches with the clamp 13 and the groove 12 is projected. In the contacting the magnetic disc 5 with the hub 1, since a clamp ring 6 is fitted to the outer circumference of the ring 14, the outer diameter of the ring 14 is restricted with a small inner diameter of the clamp ring 6 and the ring 14 is contracted toward the inner side radially. As a result, the contracting force of the ring 14 pushes the filter clamp 13 into the body, allowing to press and fix the filter 7 to the hub 1. |
