Patent ID: 8297808

Claim:
An illumination device comprising: an adjusting apparatus comprising a gear wheel element and a rotation element rotatably connected to the gear wheel element; a support portion configured for supporting the adjusting apparatus, and comprising at least one driving pole which is moveable; at least one pair of illumination portions rotatably connected to the adjusting apparatus via two opposite sides of the gear wheel element; wherein, the rotation element is rotatably connected to at least one driving pole, when the at least one driving pole is driven to move up or down relative to the support portion, the gear wheel element is driven to rotate relative to the rotation element by the at least one driving pole, thereby driving the at least one pair of illumination portions to rotate, wherein the gear wheel element comprises four gears arranged in a cross layout, each gear is paired with and opposite to another gear and their gear surfaces face away from each other, each gear surface is cambered; the number of the at least one pair illumination portions is two, each illumination portion is rotatably meshed with the gear surface of one of the four gears.