| 主权项 |
1. An umbrella comprising:
an elongated shaft having a first end and an opposite second end; a runner slidably disposed about the elongated shaft and movable along a length of the shaft; and a plurality of ribs that are attached to the runner by a plurality of main struts that move between open and closed positions in which in the open position, the ribs are in an open, extended position and in the closed position, the ribs are in a closed, collapsed position; an anti-inversion mechanism comprising a plurality of anti-inversion struts, wherein each anti-inversion strut is pivotally coupled to the shaft and is pivotally connected to a floating joint member that is freely movable along a length of the rib, the anti-inversion mechanism also including a stop that is fixedly attached to the rib and restricts the degree of travel of the floating joint member along the rib and is positioned to prevent the rib from inverting in response to an applied force. |
