Patent ID: 8246191

Claim:
A wind-driven light-emitting device comprising: a housing having a first sleeving member and a second sleeving member, wherein a first shaft and a second shaft are respectively installed in said first sleeving member and said second sleeving member, and wherein said first shaft and said second shaft respectively have a first speed change gear and a second speed change gear, and wherein said second shaft is rotated in said second sleeving member, and wherein said second sleeving member has a coil thereinside, and wherein said second speed change gear and a magnetic element are respectively installed on two ends of said second shaft; and a plurality of blades jointly coupled to said first shaft, wherein wind drives said blades and said first shaft to rotate, and wherein said first speed change gear on said first shaft rotates to drive said second speed change gear and said second shaft to rotate, and wherein said magnetic element on said second shaft is driven to rotate and induce voltage on said coil inside said second sleeving member, and wherein said coil is connected to a circuit, and wherein said circuit is connected with at least one light element selected from the group consisting of a light-emitting element arranged on said blade to be visible externally; and a light emitter arranged near the first shaft of the blades, and a light-guiding element made of optical fiber arranged beside the light emitter and arranged on said blade to guide light from the light emitter to be visible externally.