Shoe

Abstract

A shoe includes a sole, an upper portion disposed above the sole and surrounding a foot insertion part, and a buffer including a lower surface and accommodated within the foot insertion part. The lower surface of the buffer includes a projection part projecting toward a facing surface that faces the lower surface, a recess part adjacent to the projection part and recessed from the projection part toward the upper portion, and a circumferential edge projection part projecting, around the recess part, toward the facing surface side with respect to the projection part. When the buffer receives a predetermined first load, the circumferential edge projection part contacts the facing surface whereas the projection part has no contact with the facing surface, and when the buffer receives a predetermined second load, which is larger than the first load, the circumferential edge projection part and the projection part contact the facing surface.

1 . A shoe, comprising:
 a sole;   an upper portion disposed above the sole and configured to surround a foot insertion part; and   a buffer member including a lower surface and accommodated within the foot insertion part,   the lower surface of the buffer member including a projection part projecting toward a facing surface that faces the lower surface, a recess part adjacent to the projection part and recessed from the projection part toward the upper portion, and a circumferential edge projection part projecting, around the recess part, toward the facing surface side with respect to the projection part,   when the buffer member receives a predetermined first load, the circumferential edge projection part contacts the facing surface whereas the projection part has no contact with the facing surface, and   when the buffer member receives a predetermined second load, which is larger than the first load, the circumferential edge projection part and the projection part contact the facing surface.   
     
     
         2 . The shoe according to  claim 1 , wherein a space in a width direction between a peripheral wall surface of the buffer member and the upper portion is larger than a space in a longitudinal direction between the peripheral wall surface and the upper portion. 
     
     
         3 . The shoe according to  claim 1 , wherein
 the recess part intervenes between the projection part and the circumferential edge projection part in a width direction, and   extension in a width direction of the buffer member receiving a downward load is larger than extension in a longitudinal direction thereof.   
     
     
         4 . The shoe according to  claim 1 , further comprising a deformation restrictor configured to restrict a predetermined amount or more of deformation of the buffer member. 
     
     
         5 . The shoe according to  claim 4 , wherein the deformation restrictor is provided on a part that faces the lower surface or an outer peripheral side surface of the buffer member. 
     
     
         6 . The shoe according to  claim 5 , wherein the deformation restrictor comprises a protruding part protruding from the facing surface. 
     
     
         7 . The shoe according to  claim 1 , wherein
 the buffer member comprises a body part including the circumferential edge projection part, and a movable part including the projection part,   the body part has an outer shape extending along the foot insertion part and includes an accommodation part configured to accommodate at least part of the movable part, and   when a downward load is applied to the buffer member, the movable part moves downward with respect to the body part.   
     
     
         8 . The shoe according to  claim 7 , wherein the accommodation part includes an opening part disposed in a middle part in a width direction of the body part. 
     
     
         9 . The shoe according to  claim 8 , wherein an inner circumferential surface of the accommodation part has a tapered shape. 
     
     
         10 . The shoe according to  claim 9 , wherein an outer circumferential surface of the movable part extends along the inner circumferential surface. 
     
     
         11 . The shoe according to  claim 7 , wherein, when the buffer member receives the first load, the movable part is positioned away upward from the facing surface. 
     
     
         12 . The shoe according to  claim 7 , wherein the movable part is one of a plurality of movable parts provided with a space in between along a longitudinal direction. 
     
     
         13 . The shoe according to  claim 7 , wherein the movable part has a planar shape of an ellipse of which a longitudinal dimension is larger than a width dimension. 
     
     
         14 . The shoe according to  claim 7 , wherein a hardness of a material of the movable part is different from a hardness of a material of the body part. 
     
     
         15 . The shoe according to  claim 7 , wherein a hardness of a material of the body part is different between a medial side portion and a lateral side portion thereof, between which along a width direction the movable part is disposed. 
     
     
         16 . The shoe according to  claim 7 , wherein an area of the body part in contact with the facing surface is different between a medial side portion and a lateral side portion of the body part, between which the movable part is disposed. 
     
     
         17 . The shoe according to  claim 7 , wherein a friction coefficient between the body part and the facing surface is different between a medial side portion and a lateral side portion of the body part, between which the movable part is disposed. 
     
     
         18 . The shoe according to any one of  claim 1 , further comprising a link member configured to draw the upper portion downward when the buffer member receives a downward load. 
     
     
         19 . The shoe according to  claim 18 , wherein the link member is fixed to a position other than a wearing opening of the upper portion. 
     
     
         20 . The shoe according to  claim 19 , wherein the link member comprises a sole side part positioned on a top surface side of the buffer member, and an extension part that extends upward from each of both ends in a width direction of the sole side part. 
     
     
         21 . The shoe according  claim 18 , wherein the link member includes a cylindrical portion or a bag-shaped portion that is capable of wrapping a foot.