Photography – Having variable focal length of camera objective – Having focus operation
Reexamination Certificate
2006-01-19
2008-11-18
Perkey, W. B. (Department: 2862)
Photography
Having variable focal length of camera objective
Having focus operation
C396S082000
Reexamination Certificate
active
07454132
ABSTRACT:
A linkage mechanism between a zoom strobe device and a zoom finder device, which contributes to reduced size of a camera, and can control the illumination range of the zoom strobe device and the magnification of a finder optical system of the zoom finder device. A cam plate is disposed linearly movably in a direction orthogonal to an optical axis of a zoom lens barrel unit. The linear motion of the cam plate changes the magnification of the zoom finder optical system and the range of illumination with strobe light. A linkage member is disposed movable along the optical axis. The linkage member has an engaging portion for being engaged with a cam groove formed in the outer periphery of a drive ring, and moves along the optical axis as the engaging portion moves following the cam groove along with rotation of the drive ring, thereby causing the cam plate to move linearly along the optical axis.
REFERENCES:
patent: 5083146 (1992-01-01), Ueda
patent: 5673099 (1997-09-01), Haraguchi et al.
patent: 6600877 (2003-07-01), Shimizu et al.
patent: 9-211556 (1997-08-01), None
patent: 2004-145044 (2004-05-01), None
Canon Kabushiki Kaisha
Morgan & Finnegan , LLP
Perkey W. B.
Phan Minh
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