Patent ID: 7987618
Filing Date: 2011-08-02
Classification: A43B

Abstract:
1. A shock absorbing device for a shoe sole comprising: an outer sole having a ground contact surface that contacts a ground and an upper surface opposite to the ground contact surface; a midsole having a bottom surface, the midsole placed above the outer sole; and a deformation element placed between the outer sole and the midsole, wherein the deformation element is positioned at least partially at a periphery of a rear foot part, the deformation element includes an integrally formed and continuous bending deformation member that opens toward the periphery from a center of the rear foot part, Young's modulus of a material forming the bending deformation member is larger than that of a material forming the midsole and that of a material forming the outer sole, the bending deformation member comprises a lower plate portion that is joined to the upper surface of the outer sole, an upper plate portion that is joined to the bottom surface of the midsole and that forms a predetermined opening angle with respect to the lower plate portion, and a curved portion that connects the lower plate portion and the upper plate portion, wherein the lower plate portion, the upper plate portion and the curved portion are integrally formed and continuous with each other and produced from a non-foam synthetic resin, the curved portion of the bending deformation member extends along at least a medial periphery, a rear end periphery, or a lateral periphery of the rear foot part, and the lower and upper plate portions have respective opposed surfaces opposed to each other, the opposed surface of the lower plate portion and the opposed surface of the upper plate portion gradually getting away from each other as a distance from the curved portion increases, a compression deformation member is fit between the lower and upper plate portions, the compression deformation member deforming so as to store a force of restitution while being compressed, the compression deformation member gradually increases in thickness as the distance from the curved portion increases, and when an impact force of landing is loaded to the bending deformation member, the lower plate portion and/or the upper plate portion displaces or deflects in such a manner as to rotate about the curved portion with the compression deformation member being compressed so that the opening angle decreases, whereby a force of restitution is stored in the bending deformation member.