Patent ID: 8037559

Claim:
A variable posture bed, wherein a bed board is arranged in a horizontal state above and opposite a base rest which is located on a floor surface, the bed board is supported on the base rest to be vertically movable in all directions around the center thereof by a connection support portion which is erected at the center of the base rest between the base rest and the bed board and the bed board includes a rectangular perimeter is supported at corners of the rectangular perimeter and at four corners of the base rest by support members such that the bed board is vertically movable, the bed board is configured to be moved in the vertical direction with a predetermined operation pattern while the vertical movement of a head side of the bed board is limited between the horizontal position and a predetermined upper position by a drive control device, and the operation pattern includes a series of operations of: one side of the left or the right of the head side of the bed board moving to an upper limit position; the other side of the left or the right of the head side moving to the upper limit position; one side of the left or the right of the head side moving to the horizontal position; and the other side of the left or the right of the head side moving to the horizontal position.