Insole

Abstract

An insole ( 10 ) for a shoe, having: a spring steel plate ( 50 ), which is stiff in the transverse direction of the sole, particularly in the ball region of the foot, vertically flexible in the longitudinal direction of the sole and retstores itself elastically after loading, wherein the spring steel place ( 50 ) has a transverse profile ( 55 ) substantially over the entire sole region running preferably normal to the longitudinal direction of the sole; and a plastic layer in which the spring steel plate ( 50 ) is arranged, wherein the plastic layer is a polyurethane gel layer ( 18 ) with a Shore hardness 00 of 45-70.

1 . Insole ( 10 ) for a shoe, which extends at least over the front foot region of the sole, comprising:
 a spring steel plate which is rigid in the transverse direction of the sole but is vertically flexible in the longitudinal direction of the sole and resiliently returns after loading, the spring steel plate having a transverse profile; and   a plastics layer in which the spring steel plate is arranged, the plastics layer is a polyurethane gel layer having a Shore Hardness 00 of 45-70, and wherein the polyurethane gel layer fills at least the entire transverse profile of the spring steel plate and adheres to the spring steel plate, and the thickness of the polyurethane gel layer is 1.5-4 times the overall height H of the transverse profile.   
     
     
         2 . Insole according to  claim 1 , wherein the Shore Hardness 00 is 52-64. 
     
     
         3 . Insole according to  claim 1 , wherein the thickness of the gel layer is 1.8-2.5 times the overall height of the transverse profile. 
     
     
         4 . Insole according to  claim 1 , wherein the transverse profile is formed in the manner of a wave, the overall height of the profile being 0.5-2 mm, and the wavelength of the wave being 3-15 mm. 
     
     
         5 . Insole according to  claim 1 , wherein the gel layer protrudes at a uniform distance on both the upper and lower side of the transverse profile and forms a substantially flat and smooth surface. 
     
     
         6 . Insole according to  claim 1 , wherein the gel layer protrudes at different distances on the upper side and lower side respectively of the transverse profile. 
     
     
         7 . Insole according to  claim 1 , wherein the edge of the spring steel plate is surrounded by an inter-edge region consisting of polyurethane gel. 
     
     
         8 . Insole according to  claim 1 , wherein a covering layer is fixed to the surface of the polyurethane gel layer. 
     
     
         9 . Insole according to  claim 1 , wherein the spring steel plate is rigid in the rolling region of the sole. 
     
     
         10 . Insole according to  claim 1 , wherein the transverse profile of the spring steel plate extends perpendicularly to the longitudinal direction of the sole substantially over the entire sole region. 
     
     
         11 . Insole according to  claim 3  wherein the thickness of the gel layer is 2.5-3 times the overall height of the transverse profile. 
     
     
         12 . Insole according to  claim 4  where the overall height of the profile is 1.3-1.6 mm and the wavelength is 7-12 mm.