Spindle motor for driving disk

Details Spindle motor for driving disk Spindle motor for driving disk

1995-09-20

2000-01-18

Crane, Sara

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9807, 360 9912, G11B 1702

Patent

active

060162384

ABSTRACT:
A magneto-optic disk-driving spindle motor has a rotary shaft for driving a spindle hub. Bearings support the rotary shaft for free rotation. A stator core is fixed relative to the bearings, and a driving magnet is fixed relative to the spindle hub. The spindle hub is provided with an upper side having a magneto-optic disk loading face for receiving and supporting a magneto-optic disk, and an axial part that is to be fitted into the center hole of the magneto-optic disk. A lower side of the spindle hub has a connection for connecting the axial upper end of the rotary shaft to the lower shaft of the spindle hub so as to fix the spindle hub to the rotary shaft. By having the axial part on the spindle hub as opposed to the end of the rotary shaft, the rotary shaft can have a diameter other than the diameter required for engagement with the center hole of the magneto-optic disk.

REFERENCES:
patent: 4733388 (1988-03-01), Fujimoto et al.
patent: 4864443 (1989-09-01), Peterson
patent: 4874976 (1989-10-01), Oshawa et al.
patent: 5333079 (1994-07-01), Takegami et al.
patent: 5487608 (1996-01-01), Leuthold et al.

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