Patent ID: 7445228

Claim:
A collapsible structure, comprising: an upright; a sliding block sliding on the upright along an axis (X-X′), of the upright such that the sliding block does not rotate around the axis; at least one collapsible leg unfolding from a collapsed position near the upright to an unfolded position distanced from the upright; at least one jointed structure for the unfolding of the at least one collapsible leg comprising, a jointed deployment triangle, the deployment triangle comprising: a first side attached to the upright between a first joint located on the upright and a second joint located on the sliding block; a second side jointed on the sliding block by the second joint; a third side jointed on the upright by the first joint and on the second side by a third joint; wherein the first joint or the second joint comprises two distinct jointing points, so that the side of the side of the deployment triangle which is jointed at the two distinct points constitutes a rigid guiding triangle, defined by these two points and by the third joint.