Optical pickup actuator having flux shielding magnet,...

Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Transducer carriage or actuator

Reexamination Certificate

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Reexamination Certificate

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07340756

ABSTRACT:
An optical pickup actuator having a flux shielding magnet, an optical pickup employing the optical pickup actuator, and an optical disc drive apparatus employing the optical pickup. The optical pickup actuator includes: a blade holding the objective lens; coils installed to the blade; and a base having a plurality of driving magnets interacting with a current flowing through the coils and generating a force that drives the blade in a predetermined direction, a shielding magnet arranged opposite to, and having a same polarity facing at least one of the driving magnets, the shielding magnet blocking leakage of magnetic flux from the driving magnets, and a holder having a surface to which the shielding magnet is attached and to which the blade is movably attached.

REFERENCES:
patent: 2002/0150002 (2002-10-01), Pae et al.
patent: 2004/0177365 (2004-09-01), Takeshita et al.
patent: 09330532 (1997-12-01), None
patent: 10-116428 (1998-05-01), None
patent: 10241198 (1998-09-01), None
patent: 2000-076673 (2000-03-01), None
patent: 2000251295 (2000-09-01), None
patent: 2000293874 (2000-10-01), None
patent: 2002-208146 (2002-07-01), None
Office Action dated Oct. 11, 2005 from the Japanese Patent Office.

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