Camera having a collapsible mount type photographic optical syst

Details Camera having a collapsible mount type photographic optical syst Camera having a collapsible mount type photographic optical syst

1994-12-02

1996-10-29

Hayes, Monroe H.

Photography

Having variable focal length of camera objective

Power zoom

396349, 396175, G03B 1704

Patent

active

055701493

ABSTRACT:
A camera having a photographic optical system contained in a lens barrel including a zoom cam tube and a collapsible mount cam tube. The zoom cam tube is movable in a focal length adjustment region between a Tele position and a Wide position, while the collapsible mount cam tube is movable in a collapsible mount movement region between the Wide position and a fully collapsed position. During focal length adjustment action, a gear which transmits a drive force of a motor is in engagement with a first rack on the zoom cam tube, and only the zoom cam tube rotates. Due to this rotation, a cam portion is rotated via other gears meshed with the first rack, and a pair of viewfinder lenses and a light generating unit, are made movable. During collapsible mount action, the gear is in engagement with a second rack, only the collapsible mount cam tube is rotated, and the drive force of the motor is not transmitted to the cam portion.

REFERENCES:
patent: 4261658 (1981-04-01), Uchiyama et al.
patent: 5083146 (1992-01-01), Ueda

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