Thorn-proof insole

Abstract

The present invention relates to a thorn-proof insole comprising an insole assembly and a plurality of joint assemblies and featuring in matching the shape change of the sole of a foot when the insole assembly is extended. The insole assembly includes four plates which are consecutively joined together. The joint of the first plate and the second plate is located between a user's toes and thenar, the joint of the second plate and the third plate is corresponding to the middle portion of the arch of foot, and the joint of the third plate and the fourth plate is located between the arch of foot and the heel portion. The four plates could be designed with the same thickness or with different thickness according to the requirement of its location. Each plate must be at least 0.5 mm thick, and each joint assembly includes at least two first sleeves, one second sleeve and one pin. The first sleeves and the second sleeve are respectively applied to make two adjacent plates join together.

1 . A thorn-proof insole comprising an insole assembly and a plurality of joint assemblies, featuring in matching the shape change of the sole of a foot when the insole assembly being extended, the insole assembly including four plates which are consecutively joined together, the joint of the first plate and the second plate being located between a user's toes and thenar, the joint of the second plate and the third plate being corresponding to the middle portion of the arch of foot, the joint of the third plate and the fourth plate being located between the arch of foot and the heel portion, each plate being at least 0.5 mm thick, each joint assembly including at least two first sleeves, at least a second sleeve and a pin, and the first sleeves and the second sleeve being respectively applied to make two adjacent plates join together. 
     
     
         2 . The thorn-proof insole as claimed in  claim 1 , wherein the first sleeves and the second sleeve are respectively applied to make two adjacent plates join together as a one-piece product. 
     
     
         3 . The thorn-proof insole as claimed in  claim 1 , wherein the first sleeves of each joint assembly are extended from a first joint piece and the second sleeve is extended from a second joint piece, the first joint piece and the second joint piece being respectively provided a plurality of first rivet holes which are corresponding to a plurality of second rivet holes drilled on the plates, each first rivet hole and its corresponding second rivet hole being interlinked by a rivet to fix them together, and the first sleeve and the second sleeve being interlocked with the plates by adding the first joint piece, the second joint piece and the rivets. 
     
     
         4 . The thorn-proof insole as claimed in  claim 1 , wherein the plate is made of iron. 
     
     
         5 . The thorn-proof insole as claimed in  claim 1 , wherein at least a spacer is added under or on the top of the insole assembly and each spacer is made of cushion material. 
     
     
         6 . The thorn-proof insole as claimed in  claim 1 , wherein the four plates are designed with different thickness. 
     
     
         7 . The thorn-proof insole as claimed in  claim 1 , wherein the four plates are designed with same thickness. 
     
     
         8 . The thorn-proof insole as claimed in  claim 1 , wherein the plates are made of alloy, compound material of metal and nonmetal or compound material of nonmetal.