| 摘要 |
An umbrella opening mechanism adapted to open an umbrella comprising a shank having a central bore, a crown fixed to a top end of the shank, a runner movable along the shank and rib-stretcher sets connected between the crown and the runner for supporting an umbrella canopy is disclosed. The umbrella opening mechanism includes a winding device manually controlled by a crank arm. A first rope which has a first end fixed to the winding device and is capable to be wound onto the winding device extend through the central bore of the shank with a second end thereof attached to a movable connection element. Two pulleys are fixed to the shank and arranged in two radial holes defined in the shank proximate the crown and in communication with the central bore. A second rope has a center point fixed in the central bore and two half sections slidably extending through and supporting the connection element. Each half section has an end extending out of the shank through the corresponding radial hole and supported by the pulley to be fixed to the runner at two opposite sides. By actuating the winding device to wind the first rope, the connection element is moved and the second rope is pulled into the shank thereby driving the runner toward the crown and thus opening the umbrella.
|
