CARDAN MECHANISM FOR ROLLER BLINDS

摘要

The invention relates to a cardan mechanism for roller blinds, comprising a crown wheel (4), to which the adapter (5) of the shaft, tube or roller for winding the roller blind is coupled, with a rotating auger (6) which rotates the transmission shaft of the roller blind, and an inertia clutch system made up of a clutch shaft (9), housed in the crown wheel (4), configured as a bushing and to which three transmission elements (13) arranged on springs (14) are radially coupled, said springs tending to push said elements towards the perimeter of the central opening (10) of the crown, which includes three projections (15) of gradually increasing size, such that, when the roller blind is lowered and no load is applied to the transmission shaft, the clutch system is released allowing the crank to turn freely.