Single stage tracking actuator apparatus for optical beam inform

Details Single stage tracking actuator apparatus for optical beam inform Single stage tracking actuator apparatus for optical beam inform

1988-12-20

1991-06-11

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369 4415, 369 4416, G11B 2102, G11B 709

Patent

active

050238612

ABSTRACT:
Single stage tracking actuator apparatus for an optical or magneto-optical disk drive system in which a read/write head is suspended by parallel flexures between mutually isolated magnetic circuits disposed on opposite sides of the head, one of the magnetic circuits being nested in the span between the parallel flexures. The flexure suspension provides friction-free translatable motion of the head in the longitudinal direction parallel to a radial line relative to the information storage disk. An electromagnetic coil provided with tracking actuator signals is formed about the head axially concentric with and transverse to the longitudinal center line of the head and is centrally positioned on the head between the points at which the free ends of the flexures are attached to the ends of the head. The end turn segments of the coil are disposed transversely of magnetic flux lines in elongated air gaps formed in the magnetic circuits to provide the driving force for the actuator. The friction-free suspension permits the actuator to perform both the track seek and the tracking modes of operation.

REFERENCES:
patent: Re32285 (1986-11-01), Farmer et al.
patent: 4557564 (1985-12-01), Van Rosmalen
patent: 4607913 (1986-08-01), Jansen
patent: 4680743 (1987-07-01), Araki
patent: 4731770 (1988-03-01), Petersen
patent: 4740946 (1988-04-01), Yumura et al.
patent: 4752117 (1988-06-01), Ichikawa et al.
patent: 4813033 (1989-03-01), Baasch et al.
patent: 4916684 (1990-04-01), Odawara

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