| 摘要 |
An umbrella top structure includes an upper notch secured on a top portion of a central shaft, a top cap member engaged with the upper notch for fastening a central crimped portion of an umbrella cloth in between the top cap member and the upper notch as packed by a packing washer, with the top cap member having a plurality of ratchet teeth juxtapositionally formed on the cap member and the upper notch having an annular hook portion formed in an upper portion of the upper notch, whereby upon the engagement of the ratchet tooth of the cap member with the annular hook portion of the upper notch the cap member will not be loosened from the upper notch to thereby stabilize the fastening of the umbrella cloth on the top of the central shaft.
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