RAPID EXPANSION SEAT

Disclosed is a rapid expansion seat, comprising a plurality of first main rods, second main rods, third main rods, fourth main rods, and fifth main rods. The fourth main rod and the fifth main rod are both retractable structures, and the retractable structures in 5 the fourth and fifth main rods are fourth and fifth sub-rods, respectively; one end of each first main rod is vertically fixed to one end of the retractable fourth main rod, and the other end of the first main rod is fixed at a 75-degree angle to one end of the second main rod; the other end of the second main rod is hinged to one end of the third main rod; and the other end of the third main rod is hinged to the fourth sub-rod 10 in the fourth main rod by means of the fifth main rod. The present invention can transform a bench into a shelter quickly after a disaster occurs by means of main rods and sub-rods with retractable, bending and push-pull structures through reasonable size coordination, as well as sealing plates and a flexible rain cloth, so as to provide people with a shelter in time. 3 \2