| 摘要 |
An intermediate rib for collapsible umbrella is provided. The collapsible umbrella includes multiple sets of rib arrangements each of which includes an intermediate rib and an intermediate tie in addition to many other ribs and ties. The intermediate rib and tie are associated with each other by a collar put around them. The intermediate rib includes an U-shaped inner part that is adapted to support and pivotally connect to other appropriate ribs, and a round outer part that is sufficiently flexible to elastically bend in response to a wind pressure without becoming broken. The outer part of the intermediate rib bends naturally under a tension of the cover of the umbrella when the latter is stretched, giving the stretched umbrella a smooth and graceful appearance. The intermediate tie has an U-shaped bend near a middle portion thereof with two sides thereof engaged into two axial guide slots provided at two ends of the collar, so that the intermediate tie is guided by the collar to slide along the intermediate rib without shifting sideward when the umbrella is stretched or collapsed.
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