CUSHIONING DEVICE FOR REAR FOOT PORTION OF SHOE BOTTOM

摘要

A cushioning device for a rear foot portion of a shoe bottom, in which the cushioning device is capable of restricting a foot from falling inward while absorbing impact force when the foot lands on its outer side. The cushioning device has a support element (M), deformation elements (3) provided under the support element (M) and contracting in the vertical direction at the time of landing, and an outer sole (2) joined to the lower surfaces of the deformation elements (3) and coming into contact with a road surface. The deformation elements (3) and the outer sole (2) are substantially separated to the inner side and the outer side in the rear foot portion of the foot and arranged at at least three regions in the rear foot portion. In the rear foot portion, the value obtained by dividing the area of the bottom of the support element (M) by the area of the outer sole (2) is not less than 1.3. Compression rigidity in the vertical direction of a deformation element (3) on the outer side is lower than that of a deformation element (3) on the inner side.