Weight member and the use in barbell and dumbbell devices

A barbell and dumbbell device comprising:

• a base;
• two fastening plates, disposed on the base;
• two movable plates, placed on the base, in which a near position is provided when each of the movable plates is moved adjacent to a corresponding one of the fastening plates, and a distant position is provided when each of the movable plates is moved away and spaced apart from the corresponding one of the fastening plates, so that each of the movable plates is movable between the near position and the distant position;
• weight members, each weight member configured to be movably disposed on a corresponding one of the two fastening plates or one of the two movable plates;
• each of the weight members has a first side and a second side opposite to each other, and each of the weight members has a split groove through the first side and the second side;
• the first side of each of the weight members has a first mortise and a first tenon, and the split groove is located between the first mortise and the first tenon, and the second side of each of the weight members has a second tenon and a second mortise, and the split groove is located between the second tenon and the second mortise;
• the first mortise and the second tenon are arranged opposite to each other correspondingly, and the first tenon and the second mortise are arranged opposite to each other correspondingly;
• the first mortise and the first tenon of one of the weight members is sliding interlocked with the second tenon and the second mortise of another one of the weight members respectively;
• a barbell bar, wherein a barbell mode is provided when both ends of the barbell bar engage with corresponding weight members disposed on the two movable plates;
• and
• a dumbbell bar, wherein a dumbbell mode is provided when both ends of the dumbbell bar engage with corresponding weight members disposed on the two fastening plates and corresponding weight members disposed on the two movable plates when each of the movable plates is located at the distant position respectively.