| 摘要 |
A foldable advertising post, having at least two walls (11, 12), which in a transport configuration are adjacent to each other substantially along the whole internal surface, and in the working configuration are adjacent to each other only by vertical side edges, and comprising at least one expanding element (10) with a compressing rubber band (20), the expanding element (10) attached at the edge between two adjacent walls (11, 12). The expanding element (10) comprises two parts (100, 200) fixed to each other, wherein each part in the working configuration has a cross-sectional shape of a triangle, wherein the first arm (121) of the triangle is adjacent to the first arm (221) of the other part (100, 200), the second arm (122, 222) has two layers, wherein the external layer (122B, 222B) is joined via a hinge with the first arm (121, 221) and the internal layer (122A, 222A) is joined via a hinge with the third arm (123, 223) and the layers (122A, 222A, 122B, 222B) are movable with respect each other while the expanding element is transformed from the working configuration to the transport configuration, in which the angle between the first arm (121, 221) and the third arm (123, 223) reaches the value of substantially 180 0 , and wherein the compressing rubber band (20) is attached to holders (131, 132, 231, 232) formed near the opposite edges of the second arm (122, 222), thereby exerting a force biasing shortening of the length of the second arm (122, 222) and reducing the angle between the first arm (121, 221) and the third arm (123, 223). |
