Shutter blades drive mechanism for photographic cameras
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 29, 1995
Grant Date -
N/A
app pub date -
Jan 4, 1994
filing date -
Jan 11, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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