Patent attributes
A weight-adjustable dumbbell includes a dumbbell shell unit, a weight unit, and an insert pin unit. The dumbbell shell unit includes a shell body confining a receiving space, and a weight selector rod connected to the shell body, extending into the receiving space, and formed with through holes registered with insert holes in the shell body. The weight unit is extended removably into the receiving space via an open bottom of the shell body, and includes a base member provided with two positioning posts, and weight pieces stacked on the base member. Each weight piece is formed with a rod hole for extension of the weight selector rod, and two post holes for extension of the positioning posts. The insert pin unit includes an insert pin inserted removably into a selected insert hole and extending removably through a corresponding through hole in the weight selector rod.
