Footwear

Abstract

The present invention provides footwear capable of alleviating the effects of sweating feet. The footwear A includes: an outsole 1 including a chamber 1 a having a recessed portion at a site to be located under a heel; an elastic member 4 for closing an upper surface of the chamber 1 a having the recessed portion into an air-tight state, and including an expanded portion 4 a expanding upward; an insole 2 having a covering portion 2 a which is a recessed portion for covering the expanded portion of the elastic member 4, and having an opening 2 b on its upper surface; an outside-air intake opening 1 b provided on a side wall of the outsole 1; an outside-air passage 1 c provided to the outsole 1 and establishing communication between the outside-air intake opening 1 b and the chamber 1 a; a first check valve G 1 for incorporating outside air, provided inside the outside-air passage 1 c to allow the air to flow toward the chamber la and to enter therein, whereas to block the flow of the air from the chamber 1 a to the side of outside air; a discharge passage P for establishing communication between the chamber 1 a and the opening 2 b; and a second check valve G 2 for exhausting the air, provided inside the discharge passage P to allow the air to flow out of the chamber 1 a, whereas to block the flow of the air into the chamber 1 a.

1 . Footwear comprising:
 an outsole including a chamber having a recessed portion at a site to be located under a heel;   an elastic member for closing an upper surface of said chamber having said recessed portion into an air-tight state, and including an expanded portion expanding upward;   an insole having a covering portion which is a recessed portion for covering the expanded portion of the elastic member, and having an opening on its upper surface;   an outside-air intake opening provided on a side wall of said outsole;   an outside-air passage provided to said outsole and establishing communication between said outside-air intake opening and said chamber;   a first check valve for incorporating outside air, provided inside the outside-air passage to allow the air to flow toward said chamber and to enter therein, whereas to block the flow of the air from said chamber to the side of outside air;   a discharge passage for establishing communication between said chamber and said opening; and   a second check valve for exhausting air, provided inside the discharge passage to allow the air to flow out of said chamber, whereas to block the flow of the air into said chamber.   
     
     
         2 . Footwear according to  claim 1 ,
 wherein said check valve includes a first cylinder body, a second cylinder body to be inserted into said first cylinder body, and a valve interposed between said second cylinder body and said first cylinder body,   wherein said first cylinder body includes a first cylinder, a second cylinder connected to said first cylinder and having an inner diameter larger than an inner diameter of said first cylinder, and a first passage for establishing communication between said second cylinder and said first cylinder,   wherein said second cylinder body includes a first′ cylinder having an outer diameter smaller than an inner diameter of said cylinder body so that said first′ cylinder is in contact with an inner wall of said second cylinder, a second′ cylinder connected to said first′ cylinder and having an outer diameter smaller than an outer diameter of said first′ cylinder, and a second passage for establishing communication between said second′ cylinder and said first′ cylinder,   wherein said valve includes a ring portion, and a cover supported by said ring portion and having a size larger than the inner diameter of said first cylinder and smaller than the inner diameter of said ring portion and inner diameter of said first′ cylinder,   wherein, when air flows to said cover from said first passage toward said second passage, said cover moves into said first′ cylinder, and said air is introduced into said second passage,   wherein, when air flows to said cover from said second passage toward said first passage, said cover closes said first passage of said first cylinder,   wherein said first check valve for incorporating outside air moves said first cylinder body of said check valve to the side of outside air whereas said second′ cylinder body to the side of the chamber, and   wherein said second check valve for exhausting air moves said first cylinder body of said check valve to the side of said chamber.   
     
     
         3 . Footwear according to  claim 2 ,
 wherein said outsole is made of polyurethane,   wherein said first check valve for incorporating outside air is press-fit into the outside-air passage, and the end surface of the second′ cylinder of said first check valve for incorporating outside air faces said chamber,   wherein said insole includes a plurality of openings,   wherein said discharge passage for establishing communication between said chamber and said openings include:   a linear guide groove provided to said outsole and communicating with said chamber and extending toward a toe;   a branched groove provided to said outsole, branched from said linear guide groove into left and right sides, and communicating with said openings; and   a pipe accommodated in said guide groove,   wherein one end of said pipe is inserted so as to be in contact with the outer wall of the second′ cylinder of the second check valve for exhausting air, the end surface of the first cylinder of the second check valve for exhausting air faces said chamber, and the other end of said pipe faces said branched groove.   
     
     
         4 . Footwear according to  claim 1 , wherein a detachable cover is provided to the outside-air intake opening. 
     
     
         5 . Footwear according to  claim 1 , further comprising a supporting member having an elastic force, located below the elastic member and within the chamber having a recessed portion, and supporting the elastic member as it moves down. 
     
     
         6 . Footwear according to  claim 2 , wherein said discharge passage comprises:
 a linear guide groove provided to the outsole, communicating with the chamber, and extending toward the toe;   an enlarged groove provided to the outsole and enlarged from the top end of said linear guide groove; and   a pipe accommodated in said guide groove,   wherein one end of said pipe is inserted so as to be in contact with the outer wall of the second′ cylinder of the second check valve for exhausting air, the end surface of the first cylinder of the second check valve for exhausting air faces said chamber, and the other end of said pipe faces said enlarged groove, and   wherein the opening of the insole faces said enlarged groove and the opening of said insole enlarges toward the top end located at the toe side.