Objective actuator for positioning an optical pick-up device

Details Objective actuator for positioning an optical pick-up device Objective actuator for positioning an optical pick-up device

1993-08-24

1996-01-30

Epps, Georgia Y.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4417, G11B 700

Patent

active

054885949

ABSTRACT:
Disclosed is an objective actuator comprising an object lens holder for holding an object lens, the object lens holder being mounted on a support shaft in a manner that the object lens holder is slidable along and rotatable about the support shaft; a drive coil mounted on the object lens holder; first yoke provided with drive magnets, the first yoke being mounted in such manner that the drive magnets confront with the drive coil, the first yoke having a center hole which is larger in diameter than the support shaft, the first yoke and the support shaft are integrally connected by molding; and shaft holding member defined by filling a resin at the center hole of the first yoke, the shaft holding member including a base portion.

REFERENCES:
patent: 3888568 (1975-06-01), Norris et al.
patent: 4838649 (1989-06-01), Ichikawa et al.
patent: 4998802 (1991-03-01), Kasuga et al.
patent: 5103438 (1992-04-01), Masunaga et al.
patent: 5132850 (1992-07-01), Hagiwara

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