Winding shaft of a roller blind system and roller blind system with winding shaft

摘要

A winding shaft for a roller blind system with a main body for holding a rolled up planar structure that can be unwound from the winding shaft, wherein the main body takes the form of a partial cone around a winding shaft axis. The main body is formed as a hollow metal tube shaped as a partial cone.

主权项

1. A roller blind system comprising:
a winding shaft rotatably mounted about a winding shaft axis; and a flexible planar structure, one edge of which is fastened to the winding shaft; wherein the winding shaft includes a main body holding the flexible planar structure to allow the flexible planar structure to be unwound from the winding shaft, the main body being a hollow metal tube having a form of a partial cone around the winding shaft axis; wherein a thickness of a wall of the main body varies continuously along a direction of the winding shaft axis from a first main end of the main body to a second main end of the main body; and wherein the winding shaft tapers inwardly from a first shaft end of the shaft to a second shaft end of the shaft; and wherein the thickness of the wall increases from the first shaft end of the winding shaft with a greater external diameter towards the second shaft end of the winding shaft with a smaller diameter.