| 摘要 |
An automatic fold-up umbrella for easier closing has a frame having an umbrella shaft and a plurality of radial ribs. A canopy supported on the radial ribs. Elastic bodies are sewn up into every other half peripheral edge portion of the canopy to be located between the rib and a folding line of a partial canopy along an intermediate portion between the neighboring ribs. Alternatively a shape-metal alloy is sewn into one of the partial canopies so that when the umbrella is closed, the canopy can be automatically, spirally or volutely rolled in to form a curved or spiral state from the folding lines.
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