Collapsible type zoom camera

Details Collapsible type zoom camera Collapsible type zoom camera

1997-02-07

1998-02-03

Gellner, Michael L.

Photography

Having variable focal length of camera objective

Having focus operation

396 83, 396 84, 396378, 396379, 396155, G03B 1310, G03B 118

Patent

active

057154821

ABSTRACT:
A miniaturized collapsible zoom camera changes viewfinder magnification in accordance with a change in the photographic magnification. The camera is equipped with a collapsible cam tube to cause a first lens group, which rotates around the optical axis, to move from a collapsed position to a position just before a minimum magnification position. Likewise, a zoom cam tube causes the first lens group, which rotates around the optical axis, to move from the minimum magnification position to a maximum magnification position. Sector gears are formed on the outer circumference of the collapsible cam tube and the zoom cam tube. Furthermore, the camera is equipped with a cam tube drive gear which cooperates with the sector gears. A drive motor causes the drive gear to rotate. Another gear cooperates only with the sector gear of the zoom cam tube while a variable power and movement mechanism causes variable power operation in the viewfinder.

REFERENCES:
patent: 5287137 (1994-02-01), Hara et al.
patent: 5321462 (1994-06-01), Haraguchi et al.
patent: 5335030 (1994-08-01), Suzuka
patent: 5345285 (1994-09-01), Hasushita et al.
patent: 5461443 (1995-10-01), Nakayama et al.

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