Driving structure of the external rotary disk of the crystal ball

A driving mechanism, for a crystal ball, comprising:

• a substrate,
• a driving mechanism base,
• a pedestal,
• two sets of gears,
• a spring axle, and
• an external rotary disk
• wherein a base of said crystal ball is supported by the substrate, and the substrate is supported above the driving mechanism base by the pedestal,
• the two sets of gears are disposed between the driving mechanism base and the pedestal, and the pedestal and the substrate, respectively, and each of the two sets of gears include a center gear engaged with a driven gear, wherein the rotation center of each center gear is the spring axle and the rotation center of each driven gear is a positioning axle supported by the pedestal, each driven gear being engage with teeth defined circumferentially about an inner rim of the external rotary disk, and
• the diameter the center gears for each of the two sets of gears are different, and each of the center gears and the spring axle are engaged such that relative rotation is permitted in a single direction.