Cushioning mechanism for shoe midsole

Abstract

A cushioning mechanism for shoe midsole in one embodiment includes a base affixed to an outsole of the shoe and including a front cavity; a pivot member affixed to an insole of the shoe, a front end of the pivot member being pivotably secured to that of the base and the pivot member including a projecting element on a bottom, the projecting element having a concave portion; a cushioning member disposed in the cavity; a transverse sliding member disposed in a rear end of the cushioning member and having a concave portion; and an inclined suspension member having one end urged against the concave portion of the projecting element and retained thereat, and the other end urged against the concave portion of the sliding member and retained thereat.

1 . A cushioning mechanism for a midsole of a shoe, comprising:
 a base affixed to an outsole of the shoe and including a front cavity;   a pivot member affixed to an insole of the shoe, a front end of the pivot member being pivotably secured to that of the base and the pivot member including a projecting element on a bottom, the projecting element having a concave portion;   a cushioning member disposed in the cavity;   a transverse sliding member disposed in a rear end of the cushioning member and having a concave portion; and   an inclined suspension member having one end urged against the concave portion of the projecting element and retained thereat, and the other end urged against the concave portion of the sliding member and retained thereat.   
     
     
         2 . The cushioning mechanism of  claim 1 , wherein the cushioning member is a helical spring. 
     
     
         3 . The cushioning mechanism of  claim 1 , wherein the cushioning member is a compression spring. 
     
     
         4 . The cushioning mechanism of  claim 1 , wherein the cushioning member is a resilient element. 
     
     
         5 . The cushioning mechanism of  claim 4 , wherein the resilient element is formed of natural rubber, synthetic rubber, PU (polyurethane), PVC (polyvinyl chloride), or EVA (ethylene-vinyl acetate). 
     
     
         6 . The cushioning mechanism of  claim 1 , wherein the cavity comprises two rear side ridges disposed on a top, and further comprising a stop member disposed on each of the side ridges, the stop members being disposed rearward of the sliding member and having a distance therebetween less than a width of the sliding member. 
     
     
         7 . A cushioning mechanism for a midsole of a shoe, comprising:
 a base affixed to an outsole of the shoe and including a front cavity;   a pivot member affixed to an insole of the shoe, a front end of the pivot member being pivotably secured to that of the base and the pivot member including a projecting element on a bottom, the projecting element having a concave portion;   a cushioning member disposed in the cavity;   an elasticity adjustment device disposed in a front end of the cushioning member, the elasticity adjustment device being adapted to adjust an elasticity of the cushioning member;   a transverse sliding member disposed in a rear end of the cushioning member and having a concave portion; and   an inclined suspension member having one end urged against the concave portion of the projecting element and retained thereat, and the other end urged against the concave portion of the sliding member and retained thereat.   
     
     
         8 . The cushioning mechanism of  claim 7 , wherein the cushioning member is a helical spring. 
     
     
         9 . The cushioning mechanism of  claim 7 , wherein the cushioning member is a compression spring. 
     
     
         10 . The cushioning mechanism of  claim 7 , wherein the cushioning member is a resilient element. 
     
     
         11 . The cushioning mechanism of  claim 10 , wherein the resilient element is formed of natural rubber, synthetic rubber, PU (polyurethane), PVC (polyvinyl chloride), or EVA (ethylene-vinyl acetate). 
     
     
         12 . The cushioning mechanism of  claim 7 , wherein the cavity comprises two rear side ridges disposed on a top, and further comprising a stop member disposed on each of the side ridges, the stop members being disposed rearward of the sliding member and having a distance therebetween less than a width of the sliding member. 
     
     
         13 . The cushioning mechanism of  claim 7 , wherein the elasticity adjustment device comprises a rigid member in the cavity, the rigid member being urged against the front end of the cushioning member, and an adjustment screw having a head disposed externally of the cavity and a shank urging against the rigid member by driving through the cavity. 
     
     
         14 . The cushioning mechanism of  claim 13 , wherein the adjustment screw is a thumb screw. 
     
     
         15 . The cushioning mechanism of  claim 13 , wherein the rigid member is a steel plate.