Multi-function shoe pad

Abstract

A multi-function shoe pad is composed of a main body for a user's human sole to tread. The main body includes a hollow bulge integrally protruding toward a top side thereof and from a bottom side in such way that a chamber is formed below the hollow bulge. The chamber is deformable between a compressed state and an uncompressed state, so the hot air inside the chamber can exhaust and the cold air can be sucked into the chamber to enhance the air convection inside the user's shoe. Besides, the hollow bulge can allow the user's foot to tightly cling to the shoe to enable the shoe pad to be skidproof.

What is claimed is: 
     
         1 . A multi-function shoe pad comprising a single layer main body, which can allow a user's human sole to tread and structurally corresponds to respective portions of the user's human sole to be composed of a foot arch portion, a heel portion located behind the foot arch portion, a toe portion located before the foot arch portion and corresponding to the user's first, second, third, fourth, and fifth toes, and a metatarsus portion located between the foot arch portion and the toe portion, the foot arch portion having an internal foot-arch portion and an external foot-arch portion, the toe portion having an internal toe portion corresponding to the first toe and an external toe portion corresponding to the other toes of the user's foot, the metatarsus portion having an internal metatarsus portion and an external metatarsus portion; wherein the shoe pad is characterized in:
 the single layer main body having a hollow bulge, the hollow bulge having an external convex surface integrally protruding from a top side of the single layer main body, an internal concave surface integrally recessed from a bottom side of the single layer main body and corresponding to the external convex surface, and a chamber defined by the internal concave surface, the chamber being deformable between a compressed state and an uncompressed state;   wherein the single layer main body further comprises another hollow bulge located at at least one of the heel portion, the metatarsus portion, and the toe portion and having an external convex surface integrally protruding from a top side of the single layer main body, an internal concave surface integrally recessed from a bottom side of the single layer main body and corresponding to the external convex surface, and a chamber defined by the internal concave surface, the chamber being deformable between a compressed state and an uncompressed state.   
     
     
         2 . The shoe pad as defined in  claim 1 , wherein the single layer main body further comprises another hollow bulge located at the external foot-arch portion. 
     
     
         3 . The shoe pad as defined in  claim 1 , wherein the single layer main body further comprises another hollow bulge located at at least one of the heel portion, the internal metatarsus portion, the external metatarsus portion, the internal toe portion, and the external toe portion and having an external convex surface integrally protruding from a top side of the single layer main body, an internal concave surface integrally recessed from a bottom side of the single layer main body and corresponding to the external convex surface, and a chamber defined by the internal concave surface, the chamber being deformable between a compressed state and an uncompressed state. 
     
     
         4 . The shoe pad as defined in  claim 3 , wherein the single layer main body further comprises another hollow bulge located at the external foot-arch portion.