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US 6,477,333 B1Granted
Image frame changing apparatus for camera
AssigneeFuji Photo Optical Co., Ltd.
InventorsMitsuo Manabe, Mitsuhiko Oka
Life of this patent
Estimating the term…
Abstract
A view frame changing apparatus of the present invention is constructed in which cam grooves formed at view frame pieces are arched by the predetermined curvature; thus the cam pins can smoothly slide over the entire area of the sliding area of the cam grooves without being caught in the cam grooves. Moreover, the cam grooves are formed in areas of acute angles in between the two diagonal lines of the image frame; therefore, the frame changing apparatus can be compact in size.
Claims6
An image frame changing apparatus for a camera comprising:
- a pair of L-shaped image frame changing members are arranged to face each other in a direction of a pair of diagonal lines of a rectangular image frame, wherein said pair of diagonal lines form regions enclosed by a pair of obtuse angles and regions enclosed by a pair of acute angles, said obtuse and said acute angles being formed by an intersection of said diagonal lines, and
- a cam guiding device with cam pins and cam grooves, wherein the image frame changing members are guided by the cam guiding device with the cam pins and the cam grooves while moving the image frame changing members in opposite directions to each other on a plane that is parallel with said image frame when changing sizes of said image frame and said cam grooves of said cam guiding device are formed within the regions formed by said acute angles in between the two diagonal lines of said image frame and on said L-shaped image changing members, and each cam groove is arcuate with a predetermined curvature;
- and
- a drive ring, wherein a vertical movement and a horizontal movement of said L-shaped changing members adjusts an effective frame size of said image frame to a high vision view frame size, a conventional view frame size and a panoramic view frame size.
1 more element
An image frame changing apparatus for a camera comprising:
- a high vision (H) view frame;
- a rectangular conventional/panoramic (CP) view frame provided on a rear side of said high vision view frame, said rectangular conventional/panoramic (CP) view frame including
- a pair of L-shaped image frame changing members arranged to face each other in a direction of a pair of diagonal lines of the rectangular conventional/panoramic view frame, wherein said pair of diagonal lines form regions enclosed by a pair of obtuse angles and regions enclosed by a pair of acute angles, said obtuse and said acute angles being formed by an intersection of said diagonal lines, and
- a cam guiding device with cam pins and cam grooves, wherein the image frame changing members are guided by the cam guiding device with the cam pins and the cam grooves while moving the image frame changing members in opposite directions to each other on a plane that is parallel with said image frame when changing sizes of said image frame and said cam grooves of said cam guiding device are formed within the regions formed by said acute angles in between the two diagonal lines of said image frame and on said L-shaped image changing members, and each cam groove is arcuate with a predetermined curvature;
- and
- a drive ring, wherein said conventional/panoramic (CP) view frame is positioned between said high vision (H) view frame and said drive ring, and a vertical movement and a horizontal movement of said L-shaped changing members adjusts an effective frame size of said high vision view frame.
3 more elements
Dependencies are inferred from the claim text.