| 摘要 |
A sunshade includes a solid shaft, a support rib set, a stretching rib set. The two rib sets are respectively associated with a runner fitted movably around the solid shaft to stretch open or fold close the two rib sets radially disposed. Each support rib of the support rib set being pivotally and crossingly connected with each related stretching rib of the stretching rib set at an end portion of the stretching rib and at an intermediate portion of the support rib. A lower shading canvas is disposed to cover a lower annular portion of the support rib set. An upper canvas is disposed to cover an upper portion of the support rib. An aperture is formed between the upper canvas and the lower canvas after the two rib sets are stretched open to allow strong wind blowing in the interior of the two canvases to escape through the aperture.
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