Drive mechanism for collapsing a lens barrel into the body of a

Details Drive mechanism for collapsing a lens barrel into the body of a Drive mechanism for collapsing a lens barrel into the body of a

1997-09-17

1998-06-09

Metjahic, Safet

Photography

Folding or collapsible camera

Having axially moving lens

396 85, 396144, G03B 1704

Patent

active

057649375

ABSTRACT:
A drive mechanism for adjusting the spacing between first and second lens groups spaced apart from each other along the optical axis of a lens barrel of an optical device. The lens barrel is movable between a collapsed position inside the body of the optical device, a wide angle position and a telephoto angle position. The drive mechanism includes a member having a cam groove, and a guide member fit into the cam groove and connected to the second lens group for adjusting the spacing between the first and second lens groups. The guide member (a) moves in a first direction along the cam groove to adjust the spacing as the lens barrel is moved to the telephoto angle position, (b) moves in a second direction, opposite the first direction, along the cam groove to adjust the spacing as the lens barrel is moved from the telephoto angle position to the wide angle position, and (c) moves in the first direction along the cam groove to adjust the spacing as the lens barrel is moved from the wide angle position to the collapsed position.

REFERENCES:
patent: 4322150 (1982-03-01), Kamata et al.
patent: 4974949 (1990-12-01), Tanaka
patent: 5014077 (1991-05-01), Yomogizawa et al.
patent: 5144493 (1992-09-01), Normura
patent: 5198932 (1993-03-01), Takamura
patent: 5270868 (1993-12-01), Nomura
patent: 5293192 (1994-03-01), Akitake et al.
patent: 5515129 (1996-05-01), Miyazawa et al.

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