Abstract: The present invention discloses a weight adjustable dumbbell, which includes a dumbbell assembly, a dumbbell seat and a plurality of dumbbell pieces placed on two sides of the dumbbell seat, wherein the dumbbell assembly includes a handle tube, tailstock assemblies provided on two sides of the handle tube, a fixed shaft provided throughout inside the handle tube and the tailstock assembly and two telescopic tubes symmetrically sleeved outside the fixed shaft, wherein the handle tube is rotatably connected between the two tailstock assemblies, the handle tube is a hollow tube pieces, with an inner wall thereof being provided with two guide grooves with opposite screw directions, one end of the telescopic tube close to the center of the handle tube is provided with a guide block, and the other end thereof is symmetrically provided with an anti-rotation block , the tailstock assembly includes a tailstock body.

Abstract: The present invention discloses a weight adjustable dumbbell, which includes a dumbbell assembly, a dumbbell seat and a plurality of dumbbell pieces placed on two sides of the dumbbell seat, wherein the dumbbell assembly includes a handle tube, tailstock assemblies provided on two sides of the handle tube, a fixed shaft provided throughout inside the handle tube and the tailstock assembly and two telescopic tubes symmetrically sleeved outside the fixed shaft, wherein the handle tube is rotatably connected between the two tailstock assemblies, the handle tube is a hollow tube pieces, with an inner wall thereof being provided with two guide grooves with opposite screw directions, one end of the telescopic tube close to the center of the handle tube is provided with a guide block, and the other end thereof is symmetrically provided with an anti-rotation block, the tailstock assembly includes a tailstock body.

Abstract: The present invention discloses a weight-adjustable dumbbell component with a locking mechanism, comprising a dumbbell component, a dumbbell seat and a plurality of dumbbell pieces placed at two sides of the dumbbell seat. The dumbbell seat comprises a handle component, tailstock components disposed at two sides of the handle component and two sliders movably connected to two ends of the handle component. Rotating the handle component can drive the sliders to move slidably in a rotation stopping groove. By disposing a guiding groove inside a handle tube, a guiding block at one end of one of the sliders is mounted inside the guiding groove and the guiding groove inside the handle tube can pull the one of the sliders to move leftward or rightward.