Patent ID: 7610634

Claim:
A bathtub device comprising: an internal wall made of a flexible material, the internal wall is shaped as a concave tub and is configured to hold water and a user submersed in the water, the internal wall including a front surface, a rear surface, a right surface, a left surface, and a bottom surface; a pressure unit configured to change a shape of the internal wall by applying a pressure on the internal wall; a setting unit configured to set a movement range for the shape of the internal wall; and a pressure control unit configured to control the pressure unit based on an operation entry by a user and the movement range, wherein the pressure control unit is configured to change the shape of the internal wall in length, width or depth directions within the movement range for the shape of the internal wall by controlling the pressure unit to apply a pressure independently to each of the front, rear, right, left, or bottom surface of the internal wall.