Pull rib of wind-resistant umbrella

A pull rib structure of a wind-resistant umbrella, wherein the wind-resistant umbrella frame comprises an inner rib, an intermediate rib, an outer rib, and a stretcher, and further comprises a pull rib, the pull rib comprising a rigid pull bar section and a flexible pull wire connected to each other, the pull bar section having a free end connected to an inner end of the intermediate rib, the pull wire having a free end fixedly connected to the outer rib, wherein the free end of the pull wire is connected through a tighten-up device to the outer rib so that the tighten-up device is mounted to the outer rib and the tighten-up device comprises a position-restoration member that is connected to the free end of the pull wire and applies a position-restoration driving force to the pull wire;

• wherein the tighten-up device comprises a slide track that defines a stroke of movement and an extend-through hole that receives the pull wire to extend therethrough into the slide track;
• and
• wherein the position-restoration member comprises a set of magnets, one of which is fixed to a rear end of the slide track, the pull wire extending through the extend-through hole of the tighten-up device to connect to another one of the magnets such that the magnets generates a force, serving as the position-restoration driving force, applied to the pull wire to keep the pull wire in a stretched and straight condition.