Link mechanism shutter device

Details Link mechanism shutter device Link mechanism shutter device

1998-08-06

2000-09-26

Adams, Russell

Photography

Camera detail

Shutter

396456, G03B 908

Patent

active

061234672

ABSTRACT:
A shutter device functioning as a focal-plane shutter device for cameras, includes a shutter blade, a base plate, a first arm member and a second arm member. The first arm member has one end portion rotatably fitted to the shutter blade and further has the other end portion rotatably fitted to the base plate, while the second arm member has one end portion rotatably fitted to the shutter blade and further has the other end portion rotatably fitted to said base plate. In this shutter device, the distance between the center of rotation of the first arm member with respect to the shutter blade and the center of rotation of the second arm member with respect to the shutter blade is set to be different from the distance between the center of rotation of the first arm member with respect to the base plate and the center of rotation of the second arm member with respect to the base plate.

REFERENCES:
patent: 4975722 (1990-12-01), Suzuki et al.
patent: 5214463 (1993-05-01), Ishida et al.
patent: 5420654 (1995-05-01), Tanabe et al.
patent: 5475459 (1995-12-01), Matsubara et al.

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