Driving structure of the external rotary disk of the crystal ball
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United States of America Patent
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Dec 30, 1997
Grant Date -
N/A
app pub date -
Mar 6, 1996
filing date -
Mar 6, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is related to a driving structure of the external rotary disk of the crystal ball the inner rim the external rotary disk of which is provided with two set of gears which is engaged with the external rotary disk. The diameters of center gear for each set of the gears are different with each other, wherein the center gears are formed an unidirectional device with the axle of the spring. Therefore, the external rotary disk is driven by the dynamic force of the spring of the music box through one of the gears sets, on the contrary, the external rotary disk can be rotated with a preset direction, thus the other gear set will be driven to rapidly tightly wind the spring of the music box.
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