Air pump assembly for ventilative footwear

Abstract

Disclosed is an air pump assembly for ventilative footwear, in which the air pump assembly is mounted onto a heel portion of an outsole, so that external air is forcibly introduced into an interior of a shoe when walking, thereby cleaning the interior of the shoe and providing a pedestrian with a cushion function. If the air pump assembly is compressed by the compression force, the bending portion is smoothly bent along the resilient ring, while if the compression force is released, the rigid plate the bending portion is naturally restored. Accordingly, the fatigue of the bending portion due to the repeated retraction is reduced, thereby preventing the rupture of the assembly and thus extending its life.

1 . An air pump assembly for ventilative footwear, the air pump assembly comprising: 
 a base plate with check valves for regulating air flow mounted on both sides;    an upper rigid plate;    a compression spring interposed between the base plate, and the upper rigid plate;    an elastic cover covering the upper rigid plate, with a border thereof being airtightly hot-melted onto the base plate; and    a resilient ring interposed between the base plate and the rigid plate, so that a middle portion of the elastic cover is pulled toward a center axis of the resilient ring to form a concave bending portion.    
     
     
         2 . The air pump assembly as claimed in  claim 1 , wherein the resilient ring is closely contacted with an outer edge of the middle portion of the elastic cover.  
     
     
         3 . The air pump assembly as claimed in  claim 1 , wherein the resilient ring is a coil spring.  
     
     
         4 . The air pump assembly as claimed in  claim 1 , wherein the resilient ring is a hollow pipe.  
     
     
         5 . The air pump assembly as claimed in  claim 2 , wherein the resilient ring is a coil spring.  
     
     
         6 . The air pump assembly as claimed in  claim 2 , wherein the resilient ring is a hollow pipe.