| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk storage device high in rigidity and impact resistance and also thin in thickness. SOLUTION: This hard disk device 50 has a constitution similar to that of a conventional device except those of an electric circuit board 52 and a casing 54. The electric circuit board has an opening 56 in a center for putting an SPM 18 through, a board surface 52a positioned in an area directly below a hard disk 20, and a board surface 52b set lower by one step from the board surface 52a because of a bent step 58, and is fixed onto a casing. An IC 34 and an electric part item 35 disposed in an area directly below a disk are all mounted on the board surface of the casing side, and on the other hand, an IC 36 disposed outside the area directly below the disk is arranged in the board surface 52b. The bottom part of the casing is made of plastic thicker than the height dimension than the IC 36 or the like, an opening 28 for exposing the lower surface of the SPM is provided in the center, and a recessed housing room 58 for housing the IC 34 or the like is provided in the bottom part.
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