Camera

Details Camera Camera

1996-09-20

1998-01-13

Metjahic, Safet

Photography

With viewfinder

Selective or adjustable viewfinder field

396382, 396 84, G03B 1312

Patent

active

057088861

ABSTRACT:
A camera is applied to a compact camera or a VTR integrated with a simplified camera. A cam cylinder is used as lens driving mechanisms for a photographing optical system and a finder optical system. A moving lens frame and a connecting member provided with a cam dependent moving member are connected with an elastic member for forcing in a direction approaching each other, and then when an external force is added to the moving lens frame, the zoom lens system can be prevented from being damaged. A space near a focal surface is sealed up by a taking lens frame and a concave portion of a case, whereby the focal surface can be kept from collecting dust. Further, both end portions of a guide pole for guiding the taking lens frame so as to move back and forth in the case are press fitted into through holes formed at front and rear ends of the case and supported, whereby the guide pole can be assembled easily. Plural cylindric pins are formed at corner portions of a rectangular lens, and then the pins come in contact with flat portions formed at corner portions of an adjacent lens, so that plural lenses can be held in predetermined intervals without an interval ring. Further, a back focus can be adjusted from the front of the zoom lens system and the focus of image can be kept though the case expands or contracts because of a temperature change.

REFERENCES:
patent: 4340291 (1982-07-01), Berg
patent: 4945372 (1990-07-01), Higuchi et al.
patent: 5036346 (1991-07-01), Hatamori et al.
patent: 5068678 (1991-11-01), Mogamiya et al.
patent: 5333024 (1994-07-01), Labaziewicz
patent: 5438381 (1995-08-01), Mogamiya et al.

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