Cancealed air breathing structure of shoe sole

Abstract

A shoe sole comprises an outer layer, a waterproof ventilation layer, and an inner layer. The outer layer is provided with a plurality of interstices penetrating the outer layer in such a way that the interstices deviate from the longitudinal direction of the outer layer by a predetermined angle, and that the interstices remain contiguous to one another at such time when the outer layer is not exerted on by an external force, and further that the interstices are so stretched as to enable both sides of the outer layer to communicate with each other at the time when the outer layer is deformed by an external force exerting thereon.

What is claimed is:  
     
         1 . A shoe sole comprising: 
 an outer layer having a profile of the shoe sole and made of an elastic material;    an inner layer fixed on said outer layer and capable of breathing; and    a waterproof ventilation layer sandwiched between said outer layer and said inner layer; 
 wherein said outer layer is provided with a plurality of interstices which penetrate said outer layer in such a manner that said interstices deviate from the longitudinal direction of said outer layer at an angle, and that said interstices remain contiguous to one another at such time when said outer layer is not exerted on by an external force, and further that said interstices are stretched to open up at such time when said outer layer is exerted on by an external force to deform.  
   
     
     
         2 . The shoe sole as defined in  claim 1 , wherein said inner layer is made of a breathable material.  
     
     
         3 . The shoe sole as defined in  claim 2 , wherein said inner layer is made of a nonwoven fabric.  
     
     
         4 . The shoe sole as defined in  claim 1 , wherein said waterproof ventilation layer is made of a breathable PE film.  
     
     
         5 . The shoe sole as defined in  claim 1 , wherein said interstices are located in an area corresponding in location to a portion of the shoe sole for accommodating the foot sole.  
     
     
         6 . The shoe sole as defined in  claim 1 , wherein said interstices are disposed in a direction perpendicular to the longitudinal direction of said outer layer.  
     
     
         7 . The shoe sole as defined in  claim 1 , wherein said outer layer is provided in an outer side thereof with a plurality of veins; wherein said interstices are disposed along an orientation of said veins.