Focus adjusting apparatus in zoom lens camera

Details Focus adjusting apparatus in zoom lens camera Focus adjusting apparatus in zoom lens camera

1989-02-14

1990-03-20

Hix, L. T.

350252, 350255, G03B 118

Patent

active

049105442

ABSTRACT:
A focus adjusting apparatus including an immovable cylinder secured to a camera body, a cam ring which is associated with the immovable cylinder to rotate and move in the optical axis directions and which is provided on its outer periphery with a circumferential groove or projection, a thrust member having a projection or groove which is engaged by the groove or the projection of the cam ring. The thrust member is capable of moving together with the cam ring in the optical axis direction and rotating relative to the cam ring. The apparatus also includes an adjustment fixing device for moving the thrust member in the optical axis directions to fix the thrust member to the immovable cylinder at a desired position.

REFERENCES:
patent: 4387968 (1983-06-01), Sekiguchi
patent: 4533218 (1985-08-01), Nakazato et al.

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