Sole and footwear having the sole

Abstract

A sole includes a rearfoot portion, a forefoot portion, and an arch portion connecting the rearfoot portion and the forefoot portion. The forefoot portion, the arch portion and the rearfoot portion are arranged in sequence along a front-back direction. The sole further includes a plurality of holes spaced apart in the front-back direction. Each of the plurality of holes extends from a side surface of the sole in a left-right direction of the sole, the front-back direction is perpendicular to the left-right direction, the plurality of holes are distributed in the rearfoot portion and the forefoot portion of the sole except for the arch portion. A footwear having the sole is also provided.

What is claimed is: 
     
         1 . A sole comprising:
 a rearfoot portion;   a forefoot portion; and   an arch portion connecting the rearfoot portion and the forefoot portion;   wherein the forefoot portion, the arch portion and the rearfoot portion are arranged in sequence along a front-back direction, the sole further comprises a plurality of holes spaced apart in the front-back direction, each of the plurality of holes extends from a side surface of the sole in a left-right direction of the sole, the front-back direction is perpendicular to the left-right direction, the plurality of holes are distributed in the rearfoot portion and the forefoot portion of the sole, except for the arch portion.   
     
     
         2 . The sole of  claim 1 , wherein the plurality of holes comprises a plurality of first holes distributed in the rearfoot portion and a plurality of second holes distributed in the forefoot portion;
 the rearfoot portion has a first main force-bearing region and a first secondary force-bearing region connected to the first main force-bearing region in the front-back direction, a volume of each of the plurality of first holes located in the first main force-bearing region is greater than a volume of each of the plurality of first holes located in the first secondary force-bearing region; and   the forefoot portion has a second main force-bearing region and a second secondary force-bearing region connected to the second main force-bearing region in the front-back direction, a volume of each of the plurality of second holes located in the second main force-bearing region is greater than a volume of each of the plurality of second holes located in the second secondary force-bearing region.   
     
     
         3 . The sole of  claim 2 , wherein centers of the plurality of first holes are distributed in a wavy structure along the front-back direction, and centers of the plurality of second holes are distributed in a wavy structure along the front-back direction. 
     
     
         4 . The sole of  claim 3 , wherein on a cross-section of the sole along a direction perpendicular to the left-right direction, a cross-section of each of the plurality of holes is in a shape of an acute triangle, the acute triangle comprises a base and a top angle opposite to the base in an up-down direction. 
     
     
         5 . The sole of  claim 4 , wherein each of corners of the acute triangle is rounded. 
     
     
         6 . The sole of  claim 4 , wherein the top angle of each of the plurality of first holes located in the first main force-bearing region faces a lower surface of the sole, and the base of each of the plurality of first holes located in the first main force-bearing region faces an upper surface of the sole; and
 the top angle of each of the plurality of second holes located in the second main force-bearing region faces the lower surface of the sole, and the base of each of the plurality of second holes located in the second main force-bearing region faces the upper surface of the sole.   
     
     
         7 . The sole of  claim 4 , wherein the top angle of each of the plurality of holes located at wave peaks of the wavy structure faces a lower surface of the sole, and the base of each of the plurality of holes located at wave peaks of the wavy structure faces an upper surface of the sole; and
 the top angle of each of the plurality of holes located at wave peaks of the wavy structure faces the upper surface of the sole, and the base of each of the plurality of holes located at wave troughs of the wavy structure faces the lower surface of the sole.   
     
     
         8 . The sole of  claim 4 , wherein the top angle and the base of each of the holes face a lower surface of the sole and an upper surface of the sole respectively, or the top angle and the base of each of the holes face the upper surface of the sole and the lower surface of the sole respectively; and
 the number of holes of the plurality of holes with the top angle facing the upper surface of the sole is less than the number of holes of the plurality of holes with the top angle facing the lower surface of the sole.   
     
     
         9 . The sole of  claim 1 , wherein on a cross-section of the sole along a direction perpendicular to the left-right direction, a cross-section of each of the plurality of holes is in a shape of a rhombus. 
     
     
         10 . The sole of  claim 1 , wherein each of the plurality of holes is defined by an inner surface, a chamfer formed between an outer end of the inner surface and the side surface of the sole. 
     
     
         11 . The sole of  claim 1 , wherein each of the plurality of holes penetrates the sole along the left-right direction. 
     
     
         12 . The sole of  claim 1 , wherein an area of a cross-section of each of the plurality of holes closer to the side surface is greater than an area of a cross-section of each of the plurality of holes further away from the side surface, and both the cross-section of each of the plurality of holes closer to the side surface and the cross-section of each of the plurality of holes further away from the side surface are perpendicular to the left-right direction. 
     
     
         13 . The sole of  claim 1 , wherein the sole further comprises a protrusion in a ring-shaped, the protrusion is arranged along and connected to an outer periphery of the upper surface of the sole, the protrusion and the upper surface cooperate to form a space for accommodating a foot, the protrusion comprises an inclined surface facing the space, and an end of the inclined surface away from the upper surface tilts away from a center axis of the space. 
     
     
         14 . A footwear comprising:
 an upper; and   a sole connected to the upper, the sole comprising:
 a rearfoot portion; 
 a forefoot portion; and 
 an arch portion connecting the rearfoot portion and the forefoot portion; 
 wherein the forefoot portion, the arch portion and the rearfoot portion are arranged in sequence along a front-back direction, the sole further comprises a plurality of holes spaced apart in the front-back direction, each of the plurality of holes extends from a side surface of the sole in a left-right direction of the sole, the front-back direction is perpendicular to the left-right direction, the plurality of holes are distributed in the rearfoot portion and the forefoot portion of the sole, except for the arch portion. 
   
     
     
         15 . The footwear of  claim 14 , wherein the plurality of holes comprises a plurality of first holes distributed in the rearfoot portion and a plurality of second holes distributed in the forefoot portion;
 the rearfoot portion has a first main force-bearing region and a first secondary force-bearing region connected to the first main force-bearing region in the front-back direction, a volume of each of the plurality of first holes located in the first main force-bearing region is greater than a volume of each of the plurality of first holes located in the first secondary force-bearing region; and   the forefoot portion has a second main force-bearing region and a second secondary force-bearing region connected to the second main force-bearing region in the front-back direction, a volume of each of the plurality of second holes located in the second main force-bearing region is greater than a volume of each of the plurality of second holes located in the second secondary force-bearing region.   
     
     
         16 . The footwear of  claim 15 , wherein centers of the plurality of first holes are distributed in a wavy structure along the front-back direction, and centers of the plurality of second holes are distributed in a wavy structure along the front-back direction. 
     
     
         17 . The footwear of  claim 16 , wherein on a cross-section of the sole along a direction perpendicular to the left-right direction, a cross-section of each of the plurality of holes is in a shape of an acute triangle, the acute triangle comprises a base and a top angle opposite to the base in an up-down direction. 
     
     
         18 . The footwear of  claim 17 , wherein the top angle of each of the plurality of holes located at wave peaks of the wavy structure faces a lower surface of the sole, and the base of each of the plurality of holes located at wave peaks of the wavy structure faces an upper surface of the sole; and
 the top angle of each of the plurality of holes located at wave peaks of the wavy structure faces the upper surface of the sole, and the base of each of the plurality of holes located at wave troughs of the wavy structure faces the lower surface of the sole.   
     
     
         19 . The footwear of  claim 17 , wherein the top angle and the base of each of the holes face a lower surface of the sole and an upper surface of the sole respectively, or the top angle and the base of each of the holes face the upper surface of the sole and the lower surface of the sole respectively; and
 the number of holes of the plurality of holes with the top angle facing the upper surface of the sole is less than the number of holes of the plurality of holes with the top angle facing the lower surface of the sole.   
     
     
         20 . The footwear of  claim 14 , wherein an area of a cross-section of each of the plurality of holes closer to the side surface is greater than an area of a cross-section of each of the plurality of holes further away from the side surface, and both the cross-section of each of the plurality of holes closer to the side surface and the cross-section of each of the plurality of holes further away from the side surface are perpendicular to the left-right direction.