Head driving apparatus and optical disk apparatus

Details Head driving apparatus and optical disk apparatus Head driving apparatus and optical disk apparatus

1997-09-12

2000-02-15

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4414, G11B 7085

Patent

active

060260645

ABSTRACT:
A head driving apparatus has two yokes each having two generally parallel members which extend respectively in the direction generally perpendicular to the optical axis of a lens, and the yokes are disposed on both sides of the two side surfaces of the head. Two tubular head driving coils are fixed to the head and externally fitted on the member of each yoke, which is nearer to the head. At least a first magnet is fixed to the member of each yoke lying further from the head. A plurality of second magnets are fixed to the head and oppose the first magnets. The head is supported in a non-contact state by the repulsive forces of the first magnets and the second magnets, and the head is driven by energizing the head driving coils. An optical disk apparatus is equipped with the head driving apparatus.

REFERENCES:
patent: 4570249 (1986-02-01), Malissin et al.
patent: 5191570 (1993-03-01), Shirai
patent: 5218587 (1993-06-01), Nomiyama et al.

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