Lens shutter camera including zoom lens

Details Lens shutter camera including zoom lens Lens shutter camera including zoom lens

1990-02-14

1993-11-23

Perkey, W. B.

G03B 1700

Patent

active

052648850

ABSTRACT:
A lens shutter type of camera is disclosed in which a zoom lens is positioned in a lens block (1) which has a sector gear (15) rotatably associated with the lens block and with a rotatable cam ring (14). The cam ring and sector gear are rotatable in a substantially constant axial position. A movable finder optical assembly (8) and a movable strobe assembly (9) are movable in association with movement of the zoom lens. The zoom lens is movable between an extreme telephoto position and an extreme wide angle position, as well a into a fully collapsed lens position beyond the extreme wide angle position and a macro or close-up photographing position beyond the extreme telephoto position. When the camera is in its macro mode, a prism (Pl) is inserted into the finder optical assembly to correct for parallax; the strobe assembly is moved to change its illumination angle; and an optical wedge (4e) is pivoted into the path between a light receiver (4) and a light emitter (3e). A single cam plate (53) is provided to move the finder assembly and the strobe assembly. The photographic aperture (22b) can be selectively closed by barrier plates (31a) when the zoom lens is moved into its fully collapsed position. A light intercepting assembly (210) is provided for preventing light from entering the photographic optical assembly via cam grooves (20 and 21). This intercepting assembly includes a flexible code plate (90) which surrounds a peripheral portion of the cam ring (14) and which provides positional information relating to the position of the zoom lens.

REFERENCES:
patent: 1512664 (1924-10-01), Baille
patent: 3978503 (1976-08-01), Shono
patent: 4219265 (1980-08-01), Waaske
patent: 4410253 (1983-10-01), Tsuboi
patent: 4522478 (1985-06-01), Kando et al.
patent: 4643555 (1987-02-01), Wakabayashi
patent: 4721972 (1988-01-01), Wakabayashi
patent: 4771303 (1988-09-01), Matsumoto et al.
patent: 4989027 (1991-01-01), Ishii et al.

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