Rotatable and adjustable dumbbell

A rotatable and adjustable dumbbell, comprising:

• a handle with inner end plates fixed on opposing sides of the handle, wherein a plurality of dumbbell plates are arranged outside each of the inner end plates;
• radial grooves and radial protrusions arranged on left and right sides of each of the plurality of dumbbell plates respectively, wherein:
• more than two groove-end axial baffle plates are respectively and evenly arranged on outer end surfaces of the radial grooves, inner connecting grooves are respectively arranged inside the more than two groove-end axial baffle plates, and inner radial baffle plates are respectively arranged at ends of the inner connecting grooves;
• outer end surfaces of the radial protrusions are respectively and evenly provided with more than two protrusion-end axial baffle plates, inner sides of the more than two protrusion-end axial baffle plates are respectively provided with outer connecting grooves, and outer radial baffle plates are respectively arranged at ends of the outer connecting grooves;
• and
• the inner end plates are respectively provided with radial grooves or radial protrusions facing the plurality of dumbbell plates;
• wherein the plurality of dumbbell plates and the inner end plates are both provided with slots at outer diameters thereof for restraining axial movement of lock button switches respectively arranged in the slots, a lower portion of each of the lock button switches is provided with at least one connecting gap and at least one connecting protrusion, at least one guide plate and at least one inner guide groove are provided inside each of the plurality of dumbbell plates to respectively fit with the lock button switches, the at least one guide plate is inserted into the at least one connecting gap, the at least one connecting protrusion is inserted into the at least one inner guide groove, and at least one axial elastic component is respectively provided between the lock button switches and the plurality of dumbbell plates.