Venetian blind slat and shutter housing with a roller blind member of this type of venetian blind slats

摘要

Venetian blind slat, with a hollow chamber profile, made of bent strip with two convexly curved in the same direction along the side sections (2, 3), which at its one end by way of toward one another extending shoulder section (7, 8), in a hook (4), which together from the band is formed, and which, at its other end, forming a chamber (5) are connected to one another, whose opening (11) is narrowed to one another by a hook formed from the strip (9) for the hook (4) of the next venetian blind slat of a roller shutter element is formed from the shutter slats, which leads to a roller blind coil on a rolling shutter shaft can be wound, characterized in that the radius of curvature r_a of the outer convex along the side section (2) satisfies the following condition: (d_{a maximum} – D_min.)/2,2 & Lt; r_a (D_{a maximum} – D_min.)/1,8, wherein d_min.the minimum diameter of the roller shutter winding and d_{a maximum} the maximum diameter of the roller shutter winding is in the wound-up state.