Sole with buffer elements

Abstract

A sole is provided with a plurality of buffer elements embedded in the sole at areas bearing most part of pressure applied to the sole by a wearer' foot. Each of the buffer elements includes a non-magnetic housing having a compressible structure, and two permanent magnets vertically oppositely disposed in the housing. Inner sides of the two permanent magnets have the same polarity to produce a magnetic repulsive force between the two magnets to normally expand the compressible housing to its maximum volume. When the housing is subjected to an external pressure, the magnetic repulsive force between the two magnets supports the housing while allowing the same to elastically deform and absorb a reactive force from the ground, so that a buffer effect is obtained.

What is claimed is:  
     
         1 . A sole with buffer elements, comprising a sole and a plurality of buffer elements embedded in said sole at areas that bear most part of pressure applied by a wearer's foot to said sole; 
 each of said buffer elements including a housing made of a non-magnetic material and having a compressible structure, and two permanent magnets vertically oppositely disposed in said housing with two sides having the same magnetic polarity facing toward each other to produce a magnetic repulsive force between said two permanent magnets; and    said housing being normally expanded by said magnetic repulsive force to a maximum volume thereof.    
     
     
         2 . The sole with buffer elements as claimed in  claim 1 , wherein said housing is formed from two vertically connected parts, a first one of which being provided at predetermined positions with a plurality of radially projected retaining means, and a second one of which being provided with a plurality of vertically extended long slots corresponding to said retaining means, such that said retaining means are upward and downward movably received in said long slots.  
     
     
         3 . The sole with buffer elements as claimed in  claim 1 , wherein said two permanent magnets are respectively attached at outer sides to two magnetic seats, said two magnetic seats being identical to each other and in the form of a shallow plate having an annular peripheral wall defining an open top for each said magnetic seat, and said two magnetic seats being oriented with said open tops facing toward each other.