Spindle motor and disk clamp mechanism used therein

Details Spindle motor and disk clamp mechanism used therein Spindle motor and disk clamp mechanism used therein

1991-12-13

1994-05-31

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

360 9808, 360 9905, H02K 714, G11B 1708, G11B 5016

Patent

active

053172256

ABSTRACT:
A spindle motor comprising a bracket, a hub which is rotational relative to the bracket, and bearing means disposed between the bracket and the hub, wherein the hub has a hub main body made of aluminum or an aluminum alloy, and a holder formed from a magnetic material, and wherein a rotor magnet is mounted on the inner surface of the holder. A ring-shaped recess is provided on the inner surface of the bracket, and the hub and a part of the rotor magnet extend into the ring-shaped recess. Improvements having been made on a disk clamp mechanism for mounting a recording disk on the hub of the spindle motor.

REFERENCES:
patent: 4658312 (1987-04-01), Elsasser et al.
patent: 4683505 (1987-07-01), Schmidt et al.
patent: 4701653 (1987-10-01), Merkle et al.
patent: 4779165 (1988-10-01), Elsaesser et al.
patent: 4870703 (1989-09-01), Augeri et al.
patent: 4910620 (1990-03-01), Olbrich
patent: 4968910 (1990-11-01), Meier et al.
patent: 5059844 (1991-10-01), Austine
patent: 5089922 (1992-02-01), LeClair

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