Abstract: An inflatable ball includes an inner bladder, an inflation valve, and a seamless outer foam layer. The inner bladder is formed with an air inflatable space. The inflation valve is disposed in the inner bladder for introducing gas into the air inflatable space. The seamless outer foam layer is molded over and encloses the inner bladder, and has a through hole in fluid communication with the inflation valve.

Abstract: An inflatable sports ball includes an outer cover defining an interior space and having a valve hole communicating with the interior space, an inner bladder disposed in the interior space and including two bladder halves fixed to each other, and an inflation unit disposed on the inner bladder and aligned with the valve hole. Each bladder half has an inner wall surface defining an inflatable space, and a peripheral edge surface connected to the peripheral edge surface of the other bladder half. The rib plates intersect with each other to divide the inflatable space into a plurality of inflatable regions.

Abstract: A football includes an outer cover defining an interior space and having two rows of lace holes arranged in pairs spaced apart from each other along a longitudinal direction, and a mounting area disposed between the two rows of lace holes. A lace unit includes a main body disposed on the mounting area and formed with a plurality of positioning grooves, and a plurality of laces connected to the main body and corresponding in position to the positioning grooves. Each lace is extended through a respective pair of the lace holes, is looped around the main body and the mounting area, and is positioned in a respective positioning groove.