Shutter blades drive mechanism for photographic cameras

Details Shutter blades drive mechanism for photographic cameras Shutter blades drive mechanism for photographic cameras

1994-01-04

1995-08-29

Blankenship, Howard B.

G03B 908

Patent

active

054465141

ABSTRACT:
A shutter blades opening and closing lever is biased by a spring in a direction to open shutter blades. A pin made of a soft magnetic material is built in a motor which consists of a stator having a coil wound therearound and a magnet rotor. An operation to open the shutter blades opening and closing lever is performed by the spring, whereas another operation to close the shutter blades opening and closing lever is performed by a driving pin which is integrated with the magnet rotor. In a condition where the shutter blades are closed, the shutter blades opening and closing lever is kept at a standard position thereof, against resilience of the spring, by utilizing a magnetic attractive force exerted between the pin made of the soft magnetic material and the magnet rotor.

REFERENCES:
patent: 5258797 (1993-11-01), Oyoshi et al.

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