| 摘要 |
A structure having a first semi-rigid surface (120) with a first curved edge (122), the first semi-rigid surface (120) adapted to be rotatably secured to a reference (300) to permit the first semi-rigid surface (120) to assume a fir st position and a second position, and a first joint structure (123) spanning t he first semi-rigid surface to permit the first semi-rigid surface to be folded when in the first position and unfolded when in the second position. The structure includes a second semi-rigid surface (110) having a second curved edge, the second semi-rigid surface (110) adapted to be rotatably secured to the reference (300) to permit the second semi-rigid surface to assume a firs t position. and a second position. The first and second semi-rigid surfaces (120, 110) are joined together at their first and second curved edges by a second joint structure (133) adapted to permit the first and second semi-rig id surfaces to fold approximately together when the first and second semi-rigid surfaces are in their first positions.
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