Arrangement for a roller blind

An arrangement for retracting and extending a roller blind web that has a first longitudinal edge and a second longitudinal edge that is shorter than and opposite to the first longitudinal edge, comprising:

• a cassette;
• a shaft rotatably mounted in the cassette, the first longitudinal edge of the roller blind being arranged on the shaft so that the roller blind web can be wound around and unwound from the shaft into and out of the cassette;
• an end strip movable relative to the cassette, the end strip including a housing and the second longitudinal edge of the roller blind being connected to the housing;
• a first gearwheel with a first diameter D1 and a second gearwheel with a second diameter D2 being arranged in the housing of the end strip and being rotatable about a common shaft;
• first and second telescopic arms arranged in the housing and being provided respectively with first and second racks that are engaged respectively with the first and second gearwheels so that the first telescopic arm can roll along the first gearwheel and move relative to the housing by a first distance S1 in a first direction and so that the second telescopic arm can simultaneously roll along the second gearwheel and move relative to the housing by a second distance S2 in a second direction opposite to the first direction.