Egally winded roller blind

The roller blind installation has a winding shaft (19) with a symmetrically rotating circumference and a track (15) which is fastened along one edge of the shaft. It has a raised surface (56) running the length of the shaft and which leads from the exterior circumference of the shaft to the exterior surface of the track, meaning it points away from the axis of the shaft and does not lie parallel to the radius of the winding shaft.