| 摘要 |
The umbrella includes a shaft, a lower canopy having a central opening, and an upper canopy thereabove over the opening. A first supporting assembly includes ribs, stretchers, and a runner and is connected to the shaft and first and second canopies to operably move the canopies between closed and open positions, wherein an inner portion of the upper canopy moves with the ribs. A second supporting assembly is connected to the ribs of the first assembly within the opening and connected to an outer portion of the upper canopy for operably moving the outer portion of the upper canopy between concave and convex positions while the lower canopy and inner portion of the upper canopy are retained in the concave position, such that the outer portion of the upper canopy covers the opening when concave to restrict air passage and exposes the opening when convex to permit air passage.
|
