| 摘要 |
This disclosure relates to an umbrella having a support tube uppermost end portion into which is telescopically received an umbrella shaft carrying a crown to which is pivotally connected cover ribs, a sleeve in external telescopic relationship to the support tube, a plurality of struts pivotally connected between the sleeve and the cover ribs, a threaded spindle within the umbrella shaft threaded relative to a threaded nut fixed to the umbrella shaft, and a flexible element, such as a cable, rope or wire, having ends fixed to the sleeve and to the umbrella shaft and being guided over a pulley carried by the umbrella shaft.
|
