Objective lens driver and disk drive device comprising the same

Details Objective lens driver and disk drive device comprising the same Objective lens driver and disk drive device comprising the same

2007-03-20

2007-03-20

Davis, David (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

Reexamination Certificate

active

10167412

ABSTRACT:
The present invention relates to an objective lens driver including: a support base formed of a magnetic material, comprising a base portion, a support shaft projected from the base portion, and a pair of yokes respectively projected in the same direction as the support shaft from both side edges of the base portion and located oppositely to each other with the support shaft therebetween, the yokes having opposed surfaces to which magnets are fitted; and a movable portion supported on the support shaft of the support base so as to be turnable around the axis of the support shaft and slidable in the axial direction of the support shaft, holding an objective lens having an optical axis substantially coinciding with the axial direction of the support shaft, and comprising a focusing coil supplied with a driving current at the time of focusing control of laser light radiated onto a disk type recording medium through the objective lens, and at least a pair of tracking coils supplied with a driving current at the time of tracking control of the laser light, wherein the magnets, the yokes, the base portion, and the support shaft form a magnetic circuit.

REFERENCES:
patent: 4386823 (1983-06-01), Musha
patent: 4504935 (1985-03-01), Jansen
patent: 4752117 (1988-06-01), Ichikawa et al.
patent: 5105405 (1992-04-01), Hashimoto et al.
patent: 5305151 (1994-04-01), Kakimoto et al.
patent: 5453881 (1995-09-01), Suzuki
patent: 5506732 (1996-04-01), Mori
patent: 5513047 (1996-04-01), Matsui
patent: 5581533 (1996-12-01), Fujisawa
patent: 6687062 (2004-02-01), Nakamura et al.
patent: 11161984 (1999-06-01), None

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