Pull-back windup type spring drive unit
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United States of America Patent
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Jun 17, 1997
Grant Date -
N/A
app pub date -
Sep 19, 1995
filing date -
Sep 21, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a pull-back, windup type spring drive unit with two output shafts capable of transmitting driving force to the front-wheels and rear-wheels. This unit is provided with: a frame; front-wheel and rear wheel output shafts; a drive gear; a spring; a windup gear mechanism; first and second running gear mechanisms connectable to the front-wheel and rear-wheel shafts; and a constant speed mechanism. When one of the output shafts is rotated for winding, switching gear of the windup gear mechanism moves to a mesh position and the rotation of the output shaft for winding is transmitted to the drive gear to wind up the spring. When the drive gear is rotated for running, switching gears of the respective running gear mechanism move to the respective mesh positions to transmit the rotation of the drive gear to each of the output shafts.
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