Heel fixing structure for women's shoe

Abstract

A heel is readily and firmly fastened to the insole of a woman's heeled shoe. A fastening bolt ( 15 ) with a head ( 15 a ) is screwed through a washer ( 16 ) and an insole ( 12 ) into a reinforcing shaft ( 14 ) embedded in a heel ( 13 ). The reinforcing shaft ( 14 ) includes a thin lower portion ( 14 a ) having a small external diameter fixed to a thick upper portion ( 14 b ) having a large external diameter. The thick fastening bolt ( 15 ) is screwed into the thick portion ( 14 b ) such that the heel ( 13 ) is firmly fastened to the insole ( 12 ) with the reinforcing shaft ( 14 ).

What is claimed is: 
     
         1 - 9 . (canceled) 
     
     
         10 . A heel fixing structure to an insole for a woman's shoe, comprising:
 a heel;   a metal reinforcing shaft comprising a thin lower portion and a thick upper portion having a larger external diameter than the external diameter of the thin portion, the thick portion comprising a first thread groove on the inner surface, the reinforcing shaft being embedded in the heel in the longitudinal direction of the heel; and   a fastening bolt screwed through the insole into the first thread groove to fasten the heel to the insole.   
     
     
         11 . The heel fixing structure for a woman's shoe according to  claim 10 , wherein the heel is fixed to the insole with a head of the fastening bolt and a washer provided between the head and the insole by screwing the fastening bolt. 
     
     
         12 . The heel fixing structure for a woman's shoe according to  claim 11 , wherein
 the heel comprising synthetic resin, and   the reinforcing shaft is embedded in the heel by injection molding.   
     
     
         13 . The heel fixing structure for a woman's shoe according to  claim 12 , wherein the thin portion and the fastening bolt are screwed in different directions in the thick portion such that the top surface of the head of the fastening bolt is parallel with the top surface of the insole. 
     
     
         14 . The heel fixing structure for a woman's shoe according to  claim 13 , further comprising an auxiliary bolt, wherein
 the thick portion further comprises a second thread groove beside the first thread groove, the second thread groove having a smaller diameter than that of the first thread groove, and   the fastening bolt is screwed into the first thread groove, and the auxiliary bolt is screwed into the second thread groove.   
     
     
         15 . The heel fixing structure for a woman's shoe according to  claim 14 , wherein the internal diameter of the thick portion is the same as the external diameter of the thin portion. 
     
     
         16 . The heel fixing structure for a woman's shoe according to  claim 15 , wherein the thick portion further comprises protrusions on the outer surface of the thick portion, the protrusions being for preventing relative rotation and/or detachment of the reinforcing shaft to/from the heel. 
     
     
         17 . The heel fixing structure for a woman's shoe according to  claim 15 , wherein the thin portion is connected to the thick portion by any of welding, screwing, swaging, and adhesion. 
     
     
         18 . The heel fixing structure for a woman's shoe according to  claim 11 , wherein the reinforcing shaft is embedded in a hole provided in the heel.