Mechanism for adjusting the position of pickup in a disc player

Details Mechanism for adjusting the position of pickup in a disc player Mechanism for adjusting the position of pickup in a disc player

1990-02-13

1992-06-23

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specified detail of transducer assembly support structure

369215, 369249, 360109, G11B 556, G11B 2124, G11B 310

Patent

active

051249740

ABSTRACT:
A mechanism for adjusting the position of a pickup used in a disc player. The mechanism includes a slider which is driven along a path in the radial direction of a turntable. The slider has a projection which serves as the origin of angular movement. An adjustment plate is mounted on the slider and has the pickup mounted thereon. The adjustment plate is movable in a direction perpendicular to the radial direction of the turntable. A plurality of tension springs are provided between the slider and the adjustment plate to bias the plate against one of a plurality of side walls of the slider. The tension springs further bias a lower surface of the adjustment plate against the projection. In this manner, the optical axis of an objective lens of the pickup passes through the origin of angular movement. A tracking adjustment device is mounted on the slider for angularly moving the adjustment plate to adjust the inclination of the pickup in a tracking direction. A tangential adjustment device is mounted on the slider for angularly moving the adjustment plate to adjust the inclination of the pickup in a tangential direction. Further, a centering adjustment device is provided on the one side wall for moving the adjustment plate to adjust the centering of the pickup.

REFERENCES:
patent: 4268881 (1981-05-01), Saito
patent: 4314296 (1982-02-01), Whittle
patent: 4835642 (1989-05-01), Furukawa et al.
patent: 4872077 (1989-10-01), Tezuka
patent: 4947481 (1990-08-01), Ikedo et al.

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