Abstract: An optical lighting device includes an optical element having a light incident surface and a light emitting surface, wherein at least one first anamorphic asphere is deployed on either of the light incident surface or the light emitting surface. A first light source being square deployed on one side of the optical element and opposite to the light incident surface. The light source projects into the light incident surface, refracts by the first anamorphic asphere, transmits out of the light emitting surface and forms a predetermined light distribution area with a cut-off line on the upper fringe. Therefore, the optical lighting device has the advantage of simplified structure and high lighting efficiency.

Abstract: A generator structure for a bicycle hub is provided with a generator on an axle in a hub housing. The generator is provided with a magnet group and two opposite yoke iron groups on an outer periphery of a coil unit. The magnet group is formed by arranging plural magnets into an annular shape, and the respective magnets are made of sintered NdFeB and have an N pole at one side thereof and an S pole at the other side thereof. The N poles and the S poles of the magnets are alternately arranged around the magnet group. The outer periphery of each of the yoke iron groups is provided with claws, and the two yoke iron groups are oppositely combined together from both sides of the coil in such a manner that the claws of the yoke iron groups are located on the outer periphery of the coil unit.