| 摘要 |
An improved umbrella frame comprises a stick having an upper sleeve which has an upper nest set on the topside thereof being installed on the stick. And below the upper sleeve, the stick is further installed a mid runner and a lower runner between which a spring is set. A pluralities of long ribs are radiated around the nest and each of which have a first end pivotally connected thereto. A plurality of short ribs are radiated around the mid runner and each of which have a firs end pivotally connected thereto, and a second end pivotally connected to the long ribs. Wherein, the short ribs are made of fiber material and are formed in a solid rectangular shape with the lateral edge being longer than the top and bottom edge.
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