| 摘要 |
PURPOSE:To reduce a fact that the influence of an error factor generated in the center part of a disk is transferred to a head abutting part, by adding newly a means for controlling the disk in its revolving shaft direction, between the rotational center part of the disk and the head abutting part. CONSTITUTION:A cut-left part 3c is provided on the inside peripheral side end part, too, of a disk 2 at a groove part 3a of a pad plate 3. The disk 2 always contacts the inside peripheral end cut-left part 3c of the pad plate 3 in a spot 2c, by which the position of the revolving shaft direction of the disk always become constant in the spot 2c, even if a variation is generated in the rotational center part. In this way, a degree of influence on an abutting part 2b of a head 1 and the disk 2 becomes small, and good characteristics can be held stably. In this regard, in order to prevent the characteristics from being deteriorated, the vicinity of the inside peripheral side end part 3c of the pad plate 3 is dented by a prescribed quantity from the surface opposed to other disk 2 of the pad plate 3, and formed to a stepped shape 3d.
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