| 摘要 |
PROBLEM TO BE SOLVED: To provide an HDD (hard disk drive) having an air pumping groove. SOLUTION: At least one groove 150 is formed in any of a base plate 111 and a cover plate 112 to pump air toward an outer side of a disk 112. An outer end of the groove is located at a position inwardly separated from an edge of the disk such that an air journal zone of predetermined width is formed along a circumferential direction of the disk between the outer end of the groove and the edge of the disk. The groove is formed in multiple numbers in a circumferential direction of the disk at a predetermined interval and is extended in a radial direction from an inner side of the disk and curved in a direction in which the disk rotates. Thus, vibration of the disk is attenuated by a damping operation of air pumped by the groove and having a high pressure in the air journal zone. COPYRIGHT: (C)2003,JPO
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