Shoe with elastic sole

Abstract

A shoe with elastic sole is disclosed. The shoe comprises an inner sole, an outer sole, an upper, and an elastic sole comprising a U-shaped cavity that has openings at the two lateral sides of the sole and a U-shaped spring pad made of carbon fiber plate provided in the cavity and between the inner sole and outer sole forming a highly elastic sole structure. A U-shaped spring tab is added to the core of the U-shaped portion of the U-shaped spring pad. Alternatively, the openings of the cavity at the two lateral sides of the sole can be closed, forming a totally enclosed cavity structure. Additionally, another U-shaped cavity with a U-shaped spring pad can be provided in the anterior portion of the sole, thus forming a sole structure with U-shaped spring pads both in the anterior and heel portion of the sole. A ventilation structure is provided between the inner sole and the outer sole. The vent structure comprises ventilation holes in the lateral and rear sides of the U-shaped cavity with check intake valves provided therein, and a ventilation hole in the front side of the U-shaped cavity with a check exhaust valve provided therein. The shoe has the advantages of large deformation and high elasticity during use that can provide comforts and forced ventilation with its simple structure that is suitable for manufacture by the footwear industry.

What is claimed is:  
     
         1 . A shoe with elastic sole comprises an inner sole, an outer sole, an upper, and an elastic sole that comprises: 
 a high elastic sole structure comprising a U-shaped cavity with openings at the two lateral sides and a U-shaped spring pad provided between the inner sole and the outer sole, forming a high elasticity sole with high elasticity structure.    
     
     
         2 . A shoe with elastic sole according to  claim 1 , wherein said U-shaped spring pad comprises an upper and a lower plate in which a U-shaped portion is provided at the intersection of the upper and lower plates.  
     
     
         3 . A shoe with elastic sole according to  claim 2 , wherein a U-shaped spring tab is added to the core of the U-shaped portion in the U-shaped spring pad.  
     
     
         4 . A shoe with elastic soles according to claims  1 ,  2 , or  3 , wherein the openings at the two lateral sides of the U-shaped cavity in the heel portion of the sole are totally enclosed, forming a totally enclosed heel structure.  
     
     
         5 . A shoe with elastic sole according to  claim 4 , wherein another U-shaped cavity with openings at the two lateral sides is provided in the anterior portion of the inner sole, comprising a U-shaped spring pad that is integrally connected between the inner sole and the outer sole, thus forming a sole structure with U-shaped spring pads provided both in the anterior and heel portion of the sole.  
     
     
         6 . A shoe with elastic soles according to  claim 5 , wherein the openings at the two lateral sides of the U-shaped cavity in the anterior portion of the sole is also totally enclosed, forming a totally enclosed sole structure in the anterior portion of the sole.  
     
     
         7 . A shoe with elastic soles according to  claim 6 , wherein the U-shaped spring pad may be integrally formed with the inner sole and the outer sole, or separately bonded together to form an integral elastic sole structure.  
     
     
         8 . A shoe with elastic sole according to  claim 7 , wherein the U-shaped spring pads in the U-shaped cavities in the heel and anterior portion of the shoe may comprise one set of the U-shaped spring pads or multiple sets including at least two sets of the U-shaped spring pads.  
     
     
         9 . A shoe with elastic soles according to  claim 8 , wherein a ventilation structure is provided between the inner sole and the outer sole, and said ventilation structure is formed by the U-shaped cavity of enclosed structure between the inner sole and outer sole of the heel constituting a totally enclosed air bag structure of the heel and also at least a ventilation hole is provided at the peripheral side of the heel with at least a ventilation hole in the front part of the U-shaped cavity, while several sub-ventilation holes are provided in the peripheral sides of the inner sole and outer sole and some ventilation holes provided in the sole corresponding to the inner sole and the sub-ventilation holes in which the ventilation hole, sub-ventilation holes and the ventilation holes in the soles are communicated.  
     
     
         10 . A shoe with elastic sole according to  claim 9 , wherein at least one outnumbered check intake valve is provided at the ventilation hole of the heel portion in the totally enclosed U-shaped cavity and at least one check exhaust valve is provided at the ventilation hole in the front side of the side U-shaped cavity.  
     
     
         11 . A shoe with elastic sole according to claims  1 , 2 , or  3 , wherein a curved part is provided in the intersection of the upper plate of the elastic pad and the U-shaped part.  
     
     
         12 . A shoe with elastic sole according to  claim 10 , wherein a curved part is provided in the intersection of the upper plate of the elastic pad and the U-shaped part.  
     
     
         13 . A shoe with elastic sole according to  claim 12 , wherein the thickness of the longitudinally outer side of the upper plate h 1  is greater than the thickness of the longitudinally inner side of the upper plate and a number of raised reinforced ribs is provided on the upper surface thereof.  
     
     
         14 . A shoe with elastic sole according to  claim 13 , wherein at least one of the multiple longitudinal reinforced ribs is further provided on the bottom surface of the upper, or at least one of the longitudinal reinforced ribs is further provided in the upper surface of said lower plate wherein both ribs can be provided either separately or simultaneously.  
     
     
         15 . A shoe with elastic sole according to  claim 14 , wherein the U-shaped spring pad is made of composite material that can be either a single layer plate or plate having at least more than 2 layers.  
     
     
         16 . A shoe with elastic soles according to  claim 15 , wherein the composite material of the U-shaped spring pad is made of carbon fiber plate that can be either a single layer plate or plate having at least more than 2 layers.  
     
     
         17 . A shoe with elastic sole according to  claim 14  is characterized in that the U-shaped spring pad is made of spring steel plate that can be either a single layer plate or plate having at least more than 2 layers.  
     
     
         18 . A shoe with elastic sole according to claims  1 ,  2 , or  3 , wherein the tail of the lower plate of the U-shaped spring pad is further connected with another U-shaped spring pad forming a bidirectional structure of the U-shaped spring pad.  
     
     
         19 . A shoe with elastic sole according to  claim 17 , wherein the tail of the lower plate of the U-shaped spring pad is further connected with another U-shaped spring pad forming a bi-directional structure of the U-shaped spring pad.  
     
     
         20 . A shoe with elastic sole according to  claim 17 , wherein a wavy spring is provided at the tail of the lower plate of the U-shaped spring pad. The two ends of the wavy spring are connected to the upper and the lower plates of the U-shaped spring pad respectively.  
     
     
         21 . A shoe with elastic sole according to  claim 17 , wherein an elastic material is provided between the lower and the upper plates of the U-shaped spring pad.