Patent ID: 8037564
Filing Date: 2011-10-18
Classification: A61G

Abstract:
1. An air cell unit, comprising: an air cell being capable of housing air, the air cell having at least one opening portion and having flexibility; a base member defined by two thickness-direction surfaces connected to each other by an outer peripheral surface; a protrusion portion provided on one of said thickness-direction surfaces of the base member so as to protrude from the one thickness-direction surface of the base member in the thickness direction, the protrusion portion having an outer surface on which an opening end part of the air cell is detachably attached by a fitting such that said opening end part of the air cell surrounds the protrusion portion; at least one of a projection portion or a recessed portion provided on said outer peripheral surface of said base member and being protruded or recessed in the direction perpendicular to the thickness direction of the base member, wherein the projection portion extends laterally beyond said base member, the projection portion or the recessed portion for connecting the base member and another base member by being formed so as to connect with the other of a projection portion or a recessed portion of another base member when the base member and another base member are disposed on a flat direction so that their end portions in the direction perpendicular to the thickness direction are adjacent to each other; an air passage provided in the base member, the air passage communicating air in the air cell that is attached to the base member via the opening portion, the air passage being capable of connecting with an air passage of another base member; and a pressing member for pressing the opening end part of the air cell toward the protrusion portion in a state in which the opening end part of the air cell is attached to the protrusion portion.