Shoe sole and shoe including the same

Abstract

A shoe sole includes an outsole and a sole body. The sole body includes a low hardness portion made of a foam material having relatively low hardness and a high hardness portion made of a foam material having relatively high hardness. The low hardness portion is provided to define an entire area of a lower surface of the sole body. The high hardness portion is disposed only in a specific region of a region located above the low hardness portion of the sole body.

1 . A shoe sole comprising:
 a forefoot configured to support a toe portion and a ball portion of a foot;   a midfoot portion configured to support an arch portion of the foot;   a rearfoot portion configured to support a heel portion of the foot, the forefoot portion, the midfoot portion, and the rearfoot portion being connected a front-rear direction;   an outsole including a ground contact surface; and   a sole body located above the outsole,   the sole body including
 a low hardness portion formed from a foam material having relatively low hardness, and 
 a high hardness portion formed from a foam material having relatively'high hardness, 
   the low hardness portion is defining an entire area of a lower surface of the sole body, and   the high hardness portion is disposed only in a specific region located above the low hardness portion in the sole body.   
     
     
         2 . The shoe sole according to  claim 1 , wherein
 the sole body includes a midsole,   each of the low hardness portion end the high hardness portion is diposed in the midsole, and   the low hardness portion and the high hardness portion are bonded to each ether such that the midsole is integrally formed.   
     
     
         3 . The shoe sole according to  claim 2 , wherein
 the high hardness portion is disposed in the specific region of an upper layer portion of the midsole to define a part of an upper surface of the midsole, and   the low hardness portion is disposed to extend in a region excluding the specific region from the upper layer portion of the midsole, and entirely in a lower layer portion of the midsole that includes a region located below the specific region, so as to define a remaining portion of the upper surface e midsole and a lower surface of the midsole.   
     
     
         4 . The shoe sole according to  claim 2 , wherein
 the high hardness portion is embedded, in the midsole in a thickness direction, and   the low hardness portion is dispose entirely in a region excluding the specific region from the midsole so as to define an upper surface and a lower surface of the midsole.   
     
     
         5 . The shoe sole according to  claim 4 , wherein
 the midsole includes a lower midsole portion and an upper midsole portion stacked in the thickness direction, and   the high hardness portion is provided disposed in a portion on an upper surface side in the lower midsole portion or in a portion on a lower surface side in the upper midsole portion.   
     
     
         6 . he shoe sole according to  claim 1 , wherein
 the sole body includes a midsole and an insole,   the high hardness portion is disposed at least in the insole, and   the low hardness portion is disposed at least in the midsole.   
     
     
         7 . The shoe sole according to  claim 1 , wherein the specific region is located in a portion on a medial foot side in the sole body. 
     
     
         8 . The shoe sole according to  claim 7 , wherein the specific region is located in a portion on the medial foot side in the rearfoot portion. 
     
     
         9 . The shoe sole according to  claim 7 , wherein the specific region is located in a portion on the medial foot side in the forefoot portion, the portion including a part configured to support a big toe, and a portion on the medial foot side in the rearfoot portion, and the specific region in the forefoot portion and the specific region in the rearfoot portion are independent of each other. 
     
     
         10 . The shoe sole according to  claim 7 , wherein the specific region is located to extend in a portion on the medial foot side in the forefoot portion, the portion including a part configured to support a big toe, a portion on, the medial, foot side in the midfoot portion, and a portion on the medial foot side in the rearfoot portion. 
     
     
         11 . The shoe sole according to  claim 7 , wherein the specific region is located to extend in a portion on the medial foot side in the forefoot portion, the portion including a part configured to support a big toe, a portion on the medial foot side in the midfoot portion, a portion on the medial foot side in the rearfoot portion, and a portion on a lateral foot side in the rearfoot portion. 
     
     
         12 . The shoe sole according to  claim 1 , wherein, in an edge portion of the high hardness portion on a lateral foot side in a foot width direction, a thickness of the high hardness portion decreases toward to lateral foot side. 
     
     
         13 . The shoe sole according to  claim 1 , wherein the specific region is located in a portion on a lateral foot side in the sole body. 
     
     
         14 . The shoe sole according to  claim 13 , wherein the specific regions is located to extend in a portion on the lateral foot side in the forefoot portion, the portion including a part configured to support a little toe, and a portion on the lateral foot side in the midfoot portion. 
     
     
         15 . The shoe sole according to  claim 13 , wherein, in an edge portion of the high hardness portion on a medial foot side in a foot width direction, a thickness of the high hardness portion decreases toward the medial foot side. 
     
     
         16 . The shoe sole according to  claim 1 , wherein the specific region is located in a portion of the sole body that includes a part configured to support a heel bone. 
     
     
         17 . The shoe sole according to  claim 1 , wherein
 an Asker C hardness of the low hardness portion is 40 degrees or more and 60 degrees or less, and   an Asker C hardness of the high hardness portion is 60 degrees or more and 85 degrees or less on a condition that the high hardness portion is higher in Asker C hardness than the low hardness portion.   
     
     
         18 . A shoe comprising:
 the shoe sole according to  claim 1 ; and   an upper portion located above the shoe sole.