Patent ID: 7708343

Claim:
A seat of a vehicle, comprising: a center supporting block having a first supporting surface for supporting an occupant; a plurality of side supporting blocks, each side supporting block being arranged at a side of the center supporting block in a width direction of the center supporting block, each side supporting block having a second supporting surface that protrudes relatively further than the first supporting surface of the center supporting block, each side supporting block including an upper side-supporting block for supporting a shoulder of the occupant and a lower side-supporting block for supporting a hip of the occupant; a plurality of movable supporting blocks, each of the movable supporting blocks being arranged between the center supporting block and one of the upper side supporting blocks, each movable supporting block having a third supporting surface that is flush with the first supporting surface while in an initial state; a plurality of joining portions, each of the joining portions joining one of the side supporting blocks to one of the movable supporting blocks; and expanding devices that are arranged at a back side of the side supporting blocks, expand the side supporting blocks, and incline the movable supporting blocks with respect to the first supporting surface of the center supporting block.