Patent ID: 7210816

Claim:
An automatically rotatable lamp ball comprising a power unit composed of a front half unit and a rear half unit, said power unit having its interior installed with batteries and a motor, said power unit provided with a switch member for controlling power conduction of said batteries, said motor provided with a downward shaft for driving rollers assembled at one side of said power unit to rotate after reducing speed, said power unit having the other side assembled with a no-power roller, said motor further provided with an upward shaft for driving a gear to rotate after reducing speed, said gear bored with a center shaft hole; a lamp arm composed of a front arm shell and a rear half arm shell, said lamp arm divided into a center arm body positioned above said power unit and two side arm bodies respectively extending downward from said center arm body arcuate to two opposite sides, said center arm body of said lamp arm having its interior formed with a center chamber for receiving a circuit board, said center arm body of said lamp arm formed with a hollow shaft groove extending downward, said two side arm bodies having their interiors respectively formed with a side chamber for installing a plurality of LEDs therein, said LEDs electrically connected with said circuit board; a transmission unit formed with a conducting center shaft, said center shaft having a part of its upper outer side fitted around with an insulating sleeve, said insulating sleeve having its outer side firmly fitted around with a conducting shaft tube, said center shaft, said insulating sleeve and said conducting shaft tube together making up a rod-shaped conductive unit, said rod-shaped conductive unit inserted through said center shaft hole of said gear of said power unit, said rod-shaped conductive unit then firmly positioned in said hollow shaft groove under said center chamber of said lamp arm, said rod-shaped conductive unit supporting said lamp arm and serving as a rotation axle of said lamp arm, a conducting brush member respectively disposed in said front and said rear half unit of said power unit, said two conducting brush members respectively having one end fixed in position and electrically connected with electricity, said two conducting brush members respectively having the other end always contacting with said conducting center shaft and said conducting shaft tube, said center shaft and said conducting shaft tube electrically connected with said circuit board in said center arm body of said lamp arm; and, said motor in said power unit driving said rollers to rotate after said switch member of said power unit is started to let said batteries supply electricity, said motor synchronously driving said lamp arm at the upper side to rotate and said LEDs in the interior to give out light.