Air-permeable waterproof device

Abstract

An air-permeable waterproof device comprises an air-permeable wall, an air vent wall, and a non-return piece. The air-permeable wall has air-permeable holes. The air vent wall has air vent holes and bumps. The air vent wall and the air-permeable wall are connected together to form a receiving room. The non-return piece is disposed in the receiving room. The air-permeable waterproof device is disposed on a shoe. Heat and moisture in the shoe are discharged out through the air-permeable holes and the air vent holes. Water in sumps on the ground will be blocked by the non-return piece and thus will not permeate into the shoe through the air vent holes to dampen the lining. Therefore, the inside of the shoe keeps nice and cool to let wearing of the shoe be comfortable and also avoid breeding of germs and foot diseases.

I claim:  
     
         1 . An air-permeable waterproof device disposed on a shoe, said shoe having a shoe sole, a top edge of the shoe sole connected with a shoe vamp, said air-permeable waterproof device comprising: 
 an air-permeable wall having air-permeable holes;    an air vent wall having air vent holes and bumps, said air vent wall and said air-permeable wall being connected together for forming a receiving room; and    a non-return piece disposed in said receiving room between said air-permeable wall and said air vent wall.    
     
     
         2 . The air-permeable waterproof device as claimed in  claim 1 , wherein said non-return piece is movable in said receiving room, and said non-return piece is shored up by said bumps of said air vent wall for maintaining a passable gap.  
     
     
         3 . The air-permeable waterproof device as claimed in  claim 1 , wherein said non-return piece is movable in said receiving room, and said non-return piece contacts said air-permeable wall to block said air-permeable holes.  
     
     
         4 . The air-permeable waterproof device as claimed in  claim 1 , wherein said air-permeable waterproof device is disposed on said shoe vamp of said shoe.  
     
     
         5 . The air-permeable waterproof device as claimed in  claim 1 , wherein said air-permeable waterproof device is disposed at said shoe sole of said shoe.  
     
     
         6 . The air-permeable waterproof device as claimed in  claim 5 , wherein said air-permeable waterproof device is integrally formed with said shoe sole.  
     
     
         7 . The air-permeable waterproof device as claimed in  claim 5 , wherein said shoe sole is opened a hole for installation and fixing of said air-permeable waterproof device.