Spindle rotation driving device with aligning member and air bearings for rotating information storage disks

摘要

A shaft which alternately stacks and holds disks and spacers is rotated by a motor having a rotor and stator. To prevent axial run-out during rotation, when the disks and spacers are fitted on the shaft, clean air is injected from an air pad to prevent eccentricity by a fluid film, and an aligning shaft is pressed against a hub on the upper end of the shaft via an air pad to attain alignment.