| 摘要 |
A foldable umbrella includes a center rod having an upper end to which a primary crown is attached. A primary runner is movable along the central rod toward/away from the primary crown for opening/closing the umbrella. Pairs of secondary crown and runner are equally spaced around the primary crown and runner. A first intermediate bar has opposite ends pivoted to the primary crown and each secondary runner. A second intermediate bar has opposite ends pivoted to the primary runner and each secondary crown. The first and second intermediate bars intersect and are pivoted to each other whereby a parallelogram linkage is formed, which drives the secondary runners simultaneously with the movement of the primary runner in opening/closing the umbrella. A first rib bar extends radially from each secondary crown and a stretcher bar is arranged between and having ends pivoted to each first rib bar and the associated secondary runner. A canopy is attached to the crowns and supported by the rib bars whereby when the umbrella is open, the canopy is expanded by the secondary crowns and the rib bars. If desired, second rib bars may be pivoted to each secondary crown and radially extend therefrom for further supporting the canopy. Corresponding stretcher bars are provided between the second rib bars and the associated runners.
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