Patent ID: 7082699
Filing Date: 2006-08-01
Classification: A43B

Abstract:
1. A midsole having a cushioning structure, which is provided between an outer sole and an upper and is suitable for absorbing a shock of landing, comprising: a midsole body defining a cavity; and a cushioning part fitted in the cavity, wherein; the cushioning part is formed of elastomer; Young modulus of a member constituting the cushioning part is set to be a value smaller than Young modulus of a member constituting the midsole body; the cushioning part is formed into a plate shape having an upper surface and a lower surface; a plurality of helical grooves and/or convex portions is formed on at least one of the upper surface and the lower surface of the cushioning part; and a thickness of the cushioning part is gradually changed along the grooves and/or the convex portions.