Structure of windshield umbrella rib

An improved rib structure of a windproof umbrella, comprising a main shaft and a predetermined number of external supporting ribs, internal supporting ribs, stretcher ribs, and linking ribs;

• wherein an end of the internal supporting rib being coupled to a pivotal connecting section of the external supporting rib, and the other end of the internal supporting rib being simultaneously coupled to the main shaft with the external supporting rib separately, such that both ends of the supporting rib being coupled to the pivotal connecting section of the internal supporting rib and the coupling section between the external rib and the main shaft, characterized in that:
• an auxiliary supporting rib being pivotally coupled to and disposed at a location between the connection section of the internal supporting rib and the outer edge of the external supporting rib;
• wherein said auxiliary supporting rib uses an isolating member substantially in “T” shape and the external supporting rib to couple its outer edge and keeps the two in an appropriate distance;
• a second umbrella layer being disposed on a ringed buckle each on the lateral sides at an appropriate position on the periphery of the external rib, thereby it enhances the stability of the umbrella rib structure, and prevents the umbrella from being bent backward due to strong wind by guiding the wind in the direction of the airflow guidance space.