Flexible disk comprising a member for filling up a gap between a metal hub and a jacket center hole without regulating a movement of the metal hub

摘要

A flexible disk (10) comprises a magnetic recording medium (11) provided with a metal hub (16), a jacket consisting of upper and lower shells (12, 13) for receiving the magnetic recording medium, and upper and lower liners (14-1, 14-2) attached to inner surfaces of the upper and the lower shells, respectively. The lower shell (13) is provided with a jacket center hole (13b) to expose the metal hub on the exterior of the jacket. The lower liner has an inner peripheral part (14-2a) which is extended to a gap (&dgr;D) between the metal hub and the jacket center hole. The inner peripheral part has slits in a radial manner. In lie of the inner peripheral part, a flexible disk (10A) may further comprise an auxiliary liner (30), freely mounted on a lower liner (14A-2), for extending to the gap. In place of the auxiliary liner, the flexible disk may comprise a member for substantially filling up the gap without regulating a movement of the metal hub.