Driving system for roll-up shades, blinds, rolling shutters and the like

A driving system for roll-up shades comprising a rotatable winding tube on which the shade is wound, a tubular casing concentrically disposed in an end portion of the winding tube, an electric motor mounted in said tubular casing and having a shaft, first coupling means kinematically coupling said motor shaft with said winding tube to drive said winding tube in rotation relative to said tubular casing when said motor is energized and to fix said winding tube relative to said tubular casing when said motor is deenergized, manually operable means for rotating said tubular casing to rotate said winding tube when said motor is deenergized, said manually operable means comprising a drive wheel having a flange portion fixed to said tubular casing at an outer end thereof, a stationary housing for said drive wheel, rotary collector means for supplying energizing current to said motor, said rotary collector means being disposed in said tubular casing and comprising a rotatable portion fixed to said tubular casing and a stationary portion connected with said stationary housing, circuit means connecting said rotary collector means with said motor, said circuit means including automatic stop means for cutting off the supply of energizing current to said motor when said shade is fully wound on said winding tube or is fully unwound, said automatic stop means being disposed in said tubular casing and comprising a stationary member connected with said stationary housing and a movable member, and second coupling means coupling said movable member of said automatic stop means kinematically with said winding tube, said second coupling means comprising component elements disposed on opposite sides of said flange portion of said drive wheel in close vicinity thereof and means kinematically connecting said component elements with one another.