| 摘要 |
The present invention relates to a two-folded automatic opened umbrella, which includes a shaft having an upper tube and a lower tube. An upper joint is provided on the top of the shaft and a middle joint is provided around the upper tube while a runner is provided around the shaft below the middle joint. An upper spring and a lower spring are put in the upper tube to provide the force for opening the umbrella. An extended rib is positioned within a triangle composed by the shaft, a main rib, and an upper branch rib to assist the umbrella being closed smoothly and being small occupation as closed. This obtains improvement and utility.
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