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Disk-clamping-assembly-for-a-low-profile-disk-drive-apparatus

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Disk clamping assembly for a low profile disk drive apparatus

Details

Inventors: Fujii, Yoshio; Chuta, Masanobu; Yasuda, Kazuyuki;
Assignee: Nippon Densan Corporation (Kyoto, JP)
Primary Examiner: Heinz; A. J.
Assistant Examiner: Evans; Jefferson
Attorney, Agent or Firm:

A disk drive apparatus in which a hard disk is fitted on a disk-fitting outer peripheral portion of a rotor hub. A gap is defined on the outer periphery of the rotor hub such that the axial height of the gap decreases radially inward. An elastic ring member, which is appropriately tensed in the circumferential direction, fits in the gap so as to exert a contracting force which serves to clamp the hard disk between itself and a disk supporting surface. The hard disk can be securely and easily fixed to the rotor hub with uniform application of the clamping pressure over the entire circumference, even when the axial height of the whole disk drive apparatus is reduced.

DETAILED DESCRIPTION Accordingly, an object of the present invention is to provide a disk drive apparatus which has further reduced axial thickness but yet capable of easily and securely fixing recording disks to a rotor hub with a high degree of uniformity over the entire circumference.
Another object of the present invention is to provide a disk drive apparatus which better prevents external scattering of lubricant without requiring further complication of the labyrinth seal.
These and other objects, features and advantages of the present invention will become clear from the following description of the preferred embodiments when the same is read in conjunction with the accompanying drawings.

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