Non-guided roller blind with improved guide shoes

The roller blind includes a tensioning levers (19,20) for drawing a blind (17) from a winding shaft (15) and holding it taut. The tensioning levers are articulated and provided with sliders which slide along corresponding guide grooves in a pull-out bar (18).The sliders may be provided with a lubricant reservoir, and be dumbbell-shaped or cylindrical to ensure jerk-free running.