Optical pickup device having yoke with a central U-shaped base a

Details Optical pickup device having yoke with a central U-shaped base a Optical pickup device having yoke with a central U-shaped base a

1989-03-13

1992-04-07

Envall, Jr., Roy N.

Boots, shoes, and leggings

359811, 359823, G02B 700

Patent

active

051034387

ABSTRACT:
An optical pickup device for applying controlled light to a track of an optical disc. Light orientation is controlled by changing the angular orientation of an objective lens mounted on a holder. The holder is disposed above an actuator base and is supported in a cantilevered manner by a suspension member fixed to the actuator base. The actuator base is mounted on a pickup body movable in a tracking direction of the disc. The holder is integrally coupled with a central portion of a yoke member, so that the yoke is also movable. The yoke member has inverted U-shaped portions provided symmetrically with respect to the central portion. Further, a pair of magnets are provided each being fixed to the outer surface of the central portion, i.e., a first inner surface of the inverted U-shaped portion, and a pair of coil members are fixed to the base. Each of the coil members is positioned within each of mangetic gaps defined by each free end of the inverted U-shaped portion and each of the magnets.

REFERENCES:
patent: 4587647 (1986-05-01), Mak et al.
patent: 4669823 (1987-06-01), Iguma et al.

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