Disk driving device

Abstract

A disk driving device includes a disk, a motor, an arm, a head, and a housing. The disk rotates about a rotation shaft extending in a vertical direction. The motor causing the disk to rotate. The arm swings about a swinging shaft which is disposed at a position different from the rotation shaft and which extends in the vertical direction. The head is disposed at a tip of the arm and is configured to perform reading or writing of information from or to the disk. The housing accommodates the disk, the motor, the arm, and the head. The housing includes a base plate, a cover, a pivot post, a tubular portion, and a screw. The base plate is a cast product and has a box shape including a bottom wall extending perpendicularly to the rotation shaft and an open top. The cover has a plate shape covering an opening of the base plate. The pivot post is a member separate from the base plate and protrudes upward from a top surface of the bottom wall along the swinging shaft. The tubular portion has a tube shape accommodating the pivot post, and the arm is attached thereto via a bearing disposed on an outer circumference thereof. The screw is inserted into a through-hole provided in the cover and is screwed to a screw hole provided at a top end of the pivot post. The pivot post includes an annular portion in a ring shape protruding in a radial direction from an outer circumferential surface thereof. A top end of the tubular portion is located above the top end of the pivot post and is in contact with a bottom surface of the cover. A bottom end of the tubular portion is disposed on the annular portion.

Dependencies are inferred from the claim text.