Patent ID: 7600330

Claim:
A shoe structure comprising: a base portion, having at least one space, wherein a load-bearing surface is located inside the base portion and is in contacted with a sole of foot of a user when the shoe structure is being worn; a cover portion, connecting to the base portion, wherein the cover portion and the base portion cover the load-bearing surface partially, and the cover portion of the shoe structure covers the foot of the user when it is being worn; and a plurality of spring devices, locating within the space of the base portion, wherein the spring device has a wire diameter between 1.0 mm to 3.5 mm, a wire pitch between 1.0 mm to 30 mm, a spring diameter between 10.0 mm to 50.0 mm and a spring free length between 10.0 mm to 50 mm; wherein the space of the base portion comprises a top part and a bottom part located on top and bottom sides of the space respectively, the top part is located on a back side of the load-bearing surface, a plurality of slots are formed on the top part and the bottom part, and both ends of each of the plurality of spring devices are locked into one of the slots of the top part and the bottom part of the base portion.