Patent ID: 8579578

Claim:
A fan biasing transmission mechanism, comprising: a gearbox affixed to a rear side of a housing of a fan motor of an electric fan; a control rod pivotally and axially movably mounted in said gearbox; a power gear fixedly mounted on said control rod and meshed with a motor shaft worm wheel of said fan motor for synchronous rotation with said fan motor; a driving gear pivotally mounted in said gearbox; a gear-clutch gear fixedly mounted on said control rod and movable with said control rod between a first position where said gear-clutch gear is meshed with said driving gear and a second position where said gear-clutch gear is separated from said driving gear; a first bevel gear fixedly mounted on said driving gear; a second bevel gear meshed with said first bevel gear, said second bevel gear having a gear shaft; a bracket; a crank arm pivotally coupled between said gear shaft and said bracket; an elastic member connected between said gear shaft and said gearbox; and a cover covering said gearbox.