Insole for shoes

Abstract

An insole includes upper and lower layers of soft and hard materials. The upper layer includes forefoot, midfoot and hindfoot regions, the hindfoot and midfoot regions have outer peripheral portions located at an elevation higher than an upper surface of the upper layer. The midfoot region has an inner arch side with an inner arch protrusion projecting upwardly from the upper surface of the upper layer to a certain height greater than an average height of the upper layer. The lower layer is attached to the midfoot and hindfoot regions of the upper layer, includes an integrally formed fan-shaped and a hook-shaped sections. The fan-shaped and hook-shaped sections are disposed in such a manner to extend towards front and rear ends of the upper layer. The hook-shaped section has left and right sides extending towards outer and inner arch sides corresponding to the hindfoot region of the upper layer.

What is claimed is: 
     
         1 . A insole comprising:
 a flexible upper layer fabricated from soft materials and configured as an inner bottom side of a shoe, including a forefoot region, a midfoot region and a hindfoot region, wherein said hindfoot region and said midfoot region have outer peripheral portions that are located at an elevation higher than an upper surface of said upper layer, said midfoot region having an inner arch side, wherein said inner arch side has an inner arch protrusion that projects upwardly from said upper surface of said upper layer to a certain height greater than an average height of the periphery defining the upper layer; and   a flexible lower layer fabricated from hard materials being attached to bottom surfaces of said midfoot and hindfoot regions of said flexible upper layer, said lower layer having a fan-shaped section and a hook-shaped section integrally formed with said fan-shaped section, said fan-shaped section and said hook-shaped section being disposed in such a manner to extend respectively towards front and rear ends of said upper layer, wherein said hook-shaped section has left and right sides extending towards outer and inner arch sides corresponding to said hindfoot region of said upper layer.   
     
     
         2 . The insole according to  claim 1 , wherein said left side of said hook-shaped section extends toward said inner arch side of said upper layer and has an elevation higher than an elevation of said right side of said hook-shaped section extending towards said outer arch side of said upper layer. 
     
     
         3 . The insole according to  claim 1 , wherein said upper and lower layers cooperatively define said midfoot region that projects upward with respect to an upper surface of said forefoot region. 
     
     
         4 . The insole according to  claim 2 , wherein said upper surface of said forefoot region of said upper layer is flat.