Focusing screen mounting device in a camera

Details Focusing screen mounting device in a camera Focusing screen mounting device in a camera

1986-02-21

1987-09-15

Mathews, A. A.

354200, 354219, G03B 1300, G03B 1912

Patent

active

046935770

ABSTRACT:
A focusing screen is inserted from a mirror box side and mounted below a pentaprism. A keeper member formed by bending a linear spring member into the shape of a frame is provided for the positioning of the focusing screen, an engaging pawl for engaging the intermediate portion of the keeper member is provided on a fixed portion near the opening of a lens mount, the opposite end portions of the keeper member opposed to the intermediate portion are rotatably supported on a fixed portion opposite to the lens mount, and the focusing screen is designed to be released from a focusing screen containing chamber along the keeper member when the keeper member is disengaged from the engaging pawl and rotated.

REFERENCES:
patent: 4132472 (1979-01-01), Urano et al.
patent: 4187016 (1980-02-01), Ishizaka
patent: 4338010 (1982-07-01), Takahashi
patent: 4346973 (1982-08-01), Katsuma et al.
patent: 4365883 (1982-12-01), Takaoka et al.

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