Head moving apparatus which cancels leakage flux

Details Head moving apparatus which cancels leakage flux Head moving apparatus which cancels leakage flux

1996-05-30

1998-04-28

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Having power driven transducer assembly

369249, 359824, G11B 7085, G11B 2102

Patent

active

057454701

ABSTRACT:
A focus driving coil is fixed to an objective lens for record/reproduction of an optical disk, and the objective lens is provided on a carriage together with the focus driving coil. The carriage is movable by a bearing contacting a guide rail, and the bearing and the carriage are guided to a predetermined direction by the guide rail. In the guide rail, a radial driving coil is provided to be inserted to the guide rail, and a radial yoke magnetically contacting the guide rail is provided. A radial driving magnet is fixed to the radial yoke, and a focus driving magnet is provided in the radial driving magnet so as to be magnetized in a direction opposite to a direction of magnetization of the radial driving magnet through the guide rail.

REFERENCES:
patent: 4504935 (1985-03-01), Jansen
patent: 4698798 (1987-10-01), Faber et al.
patent: 4763314 (1988-08-01), McCaslin et al.
patent: 5138605 (1992-08-01), Shtipelman et al.
patent: 5278820 (1994-01-01), Shtipelman
patent: 5361243 (1994-11-01), Kasahara
patent: 5563853 (1996-10-01), Ishii

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