A roller blind assembly includes a winding tube configured to be directly driven by a motor, a rollo screen configured to be wound up and off on the winding tube at one side and having an operating beam at an opposite side and including a pair of parallel rollo guides for guiding the rollo screen. The rollo screen is movable along the rollo guides between a closed position and an opened position by driving the winding tube. The assembly further includes wire pulleys on opposite outer ends of the winding tube, a springlike element having a pulley arranged on each respective outer end and tensioning wires connected at first ends to one of the respective wire pulleys and connected at second ends to the operating beam. The tensioning wires run along the pulleys of the springlike element such that the springlike element tensions the tensioning wires.

A vehicle seat includes a seat frame supporting a base cushion and an extendable cushion that moves relative to the base cushion. Textile material encloses the cushion assembly and includes a bridging segment that spans a space between the base cushion and the extendable cushion. A tensioner includes a roller that receives the segment of textile material wrapped around the roller. The roller rotates on a shaft relative to the seat frame about an axis of rotation. A return spring is connected to the roller and the shaft to exert a tensioning force on the segment of textile material. The return spring biases the segment of textile material to be rolled around the roller when retracting. The return spring resists extending and holds the segment of textile material in tension when the segment of textile material is extended.

A roller blind assembly comprises a pivotable wire lead for guiding a tensioning wire with a controlled angle from and onto a wire pulley. A roof assembly comprises such a roller blind assembly, while and a vehicle comprises said roof assembly.

A roller blind assembly and a roller blind assembly comprises a set of guidance members for guiding a tensioning wire with a controlled angle from and onto a wire pulley A roof assembly comprises such a roller blind assembly, while a vehicle comprises said roof assembly.

A roller blind assembly comprises a swiveling wire guide for guiding a tensioning wire with a controlled angle from and onto a wire pulley. A roof assembly comprises such a roller blind assembly, while a vehicle comprises said roof assembly.