| 摘要 |
The present invention relates to a structure for automatic opening umbrella, which mainly includes a runner having a middle connector and a lower connector. A main rib of umbrella frame has its inner end to connect with the upper joint. A supporting rib has its inner end to connect with the middle connector of the runner and has its outer end to connect with middle position of the main rib. A spring has its inner end to connect with the lower connector and has its outer end to connect with the outer end of the supporting rib. The spring will be tensioned as the umbrella is folded to provide a recovery force for automatic opening the umbrella.
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