Sole with reinforcement structure

A shoe sole with reinforcing structure, comprising:

• an outer sole having a ground contact surface and a top surface opposite to the ground contact surface;
• a midsole having a top surface and a bottom surface, the bottom surface being attached to the top surface of the outer sole and covering the top surface of the outer sole;
• and a reinforcing member for reinforcing a part of the midsole, wherein
• the midsole has a first arch covered with a middle foot part of a foot,
• the first arch is formed of resin foam and has a bottom surface,
• the reinforcing member has a second arch, a fore end part located in front of the second arch and a rear end part located in the rear of the second arch,
• the second arch has a top surface and a bottom surface,
• the second arch is located so as to be covered with the first arch,
• the fore end part of the reinforcing member is bonded to at least either the midsole or the outer sole in front of the first arch,
• the rear end part of the reinforcing member is bonded to at least either the midsole or the outer sole in the rear of the first arch,
• the first arch and the second arch are substantially not attached to the top surface of the outer sole and do not have ground contact when the ground contact surface of the outer sole is grounded,
• Young's modulus of the second arch is set to be greater than that of the first arch,
• a member having a greater Young's modulus than the first arch of the midsole is substantially not affixed to the bottom surface of the first arch,
• the reinforcing member is arranged so that the top surface of the second arch and the bottom surface of the first arch are opposite to each other, and
• at least a part of the bottom surface of the first arch is not in contact with a part of the top surface of the second arch in vertically spaced relationship to each other,
• whereby non-contact areas of the first arch and the second arch are defined and the non-contact areas can be deformed independently from each other when impact load of landing is applied.

A shoe sole comprising:

• a midsole having a foot bearing surface and a bottom surface, the bottom surface including a middle foot arch portion and a remaining portion,
• an outer sole having a ground contacting surface and a top surface, the outer sole being attached to and coextensive with the remaining portion of the bottom surface of the midsole,
• a first arch formed in the bottom surface of the midsole at the middle foot arch portion, a bottom surface of the first arch being concave downward, and
• a reinforcing member for the middle foot arch portion, the reinforcing member comprising:
• a second reinforcing arch, the first and second arches juxtaposed upon each other, the top surface of the second arch being convex upwards toward the bottom surface of the first arch,
• wherein portions of such top and bottom surfaces are in spaced apart relationship to each other and such portions deform independently from each other upon application of an impact load to the sole,
• wherein the second reinforcing arch has a greater Young's modulus than the first arch and a member having a greater Young's modulus than the first arch is substantially not affixed to the bottom surface of the first arch.