Motor-driven film winder
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United States of America Patent
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-
Sep 25, 1990
Grant Date -
N/A
app pub date -
Oct 16, 1989
filing date -
Oct 17, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor-driven film winder for a camera has an internal gear portion (5a) fixed to a motor (1), one or two step-shaped planet gears (7), (8) having first gears (7a), (8a) to mesh with a pinion gear (4) driven by the motor and the internal gear portion (5a) and second gears (7b), (8b) having a larger diameter than first gears (7a), (8b), and engaging with an internal gear (11a) provided on inside wall of the take-up spool (11), whereby rotation of the motor is transmitted to the take-up spool (11) with largely reduced speed of rotation and largely multiplied torque.
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