| 摘要 |
A collapsible structural assembly including first and second flexible sheets disposed in confronting relationship to one another is disclosed herein. The assembly also includes an arrangement of ribs located between and connected with the sheets so as to support the sheets as a single unit for movement between a first collapsed position such that the sheets lie flat and adjacent one another with the ribs therebetween and a second extended position such that sheets have predetermined curved configurations and the ribs serve as structural reinforcements therebetween. In the actual embodiment disclosed, one of the sheets includes an outermost light reflective surface and the predetermined curvature conferred upon the sheets including the light reflective surface is that of a parabola. In this way, the entire assembly may serve as a trough-line parabolic concentrator comprising part of an overall solar collector.
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