US Patent 11458348 Dumbbell and fitness equipment

The disclosure relates to a dumbbell, which includes a first grip rod and a counterweight assembly connected to both ends of the first grip rod, and the counterweight assembly is connected to the first grip rod through a thread structure. As the counterweight assembly of the dumbbell is connected to the first grip rod through the thread structure, different counterweights can be combined and shared to adjust the weight, thus involving a simple and flexible assembly, and the thread structure obtain a firmly connection, so that the counterweights are not easy to loosen or shake, so as to guarantee a high usage safety.