Patent ID: 7059376

Claim:
A roller blind device comprising: a fabric positionable about a rotationally drivable fabric shaft supported on a frame; a hollow pull rod including first and second ends and arranged on a free edge of the fabric on which a force acts in a direction of the drawing off of the fabric, from the fabric shaft, wherein the hollow pull rod has two parallel cylindrical rod parts; a cord reel connected to the fabric shaft coaxially and in a prolongation of the fabric shaft in such a manner that the cord reel rotates in unison with the fabric shaft; at least one cord diverter part positioned on the first or second end of the hollow pull rod; at least one cord having a first end connected to the cord reel and a second free end positioned about the at least one cord-diverter part, as a consequence of which the at least one cord is wound onto the cord reel during the pulling off of the fabric from the fabric shaft; and at least one spring arrangement, including first and second helical springs, is provided inside the hollow pull rod and supported on the at least one cord diverter part, wherein the second free end of the at least one cord is connected to the at least one spring arrangement, such that the least one spring arrangement maintains a tension on the at least one cord, wherein the at least one cord includes first and second cords, the second free end of the first cord runs to the first end of the hollow pull rod and is connected to the first helical spring and the second free end of the second cord runs to the second end of the hollow pull rod and is connected to the second helical spring, and each of the two parallel cylindrical rod parts of the hollow pull rod receives one of the first and second helical springs.