Patent ID: 8206275

Claim:
A balance training device comprising: at least one supporting base having a plank connecting portion formed with a plank coupling groove that opens upwardly, said plank coupling groove including a first groove section and a second groove section that intersects said first groove section; and at least one plank member having a plate portion and a rib structure disposed on a bottom face of said plate portion, said rib structure removably engaging said plank coupling groove and including a first rib part to engage said first groove section and a second rib part to engage said second groove section; wherein said plank connecting portion of said supporting base is formed with a plurality of projecting parts arranged in a two-dimensional array that includes a plurality of rows and columns, said first groove section being defined by said projecting parts in an adjacent pair of said columns, said second groove section being defined by said projecting parts in an adjacent pair of said rows; wherein said rib structure includes parallel first ribs that serve as said first rib part and parallel second ribs that serve as said second rib part, said first ribs cooperating with said second ribs to form a grid that defines a plurality of grid spaces to receive removably said projecting parts.