Optical type pickup apparatus with lens holder supported by fram

Details Optical type pickup apparatus with lens holder supported by fram Optical type pickup apparatus with lens holder supported by fram

1987-03-03

1989-03-07

Faber, Alan

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 44, 350 63, 350247, 350255, G11B 709, G02B 2610

Patent

active

048113204

ABSTRACT:
A optical type pickup apparatus wherein the center of gravity of the lens holder coincides with the action point of the resultant force of the forces to be produced by the control signals input into the driving coil and by the magnetic field of the magnetic circuit. Thus, this apparatus may be provided which is capable of a signal reading operation wherein the lens holder is not out of shape even if the lens holder is driven in the focusing direction and the tracking direction. The present invention is capable of reading the signals from the signal record medium and advantageous in making the apparatus smaller, because the combination between the lens holder and each of a plurality of wires is kept away by a given amount from the end secured to the frame of the wire from the mid-point position between both the ends of the frame to control the inclination when the lens holder has moved in the focusing direction and the tracking direction to normally render the posture of the objective lens proper with respect to the disc face.

REFERENCES:
patent: 4475179 (1984-10-01), Geyer
patent: 4547871 (1985-10-01), Sugiyama et al.
patent: 4568142 (1986-02-01), Iguma
patent: 4615585 (1986-10-01), Van Sluys et al.
patent: 4633456 (1986-12-01), Luecke
patent: 4643522 (1987-02-01), Takashima
patent: 4646283 (1987-02-01), Ito et al.
patent: 4658390 (1987-04-01), Fujii et al.
patent: 4679904 (1987-07-01), Kurihara

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