Golf club and method for adjusting characteristics of the same

Abstract

A golf club includes: a shaft; a head; and a shaft case, and a hosel column wherein: a threaded ring including a plurality of threads provided on an inner periphery of an inner hole of the threaded ring is provided on an upper side of a dividing member, the threads extending in an axis center direction of the inner hole; the shaft case includes a convex axis member provided at a top end of the shaft case; the convex axis member is inserted in the inner hole of the threaded ring, and any one of corner edges of the convex axis member and the convex threads connect with the threads of the threaded ring; and a bolt that is inserted into a bolt insertion hole provided to the dividing member from a sole side of the head is screwed into the shaft case.

What is claimed is: 
     
         1 . A golf club comprising:
 a shaft;   a head attached to a top end of the shaft; and   a shaft case having an approximately cylindrical shape, bonded to the top end of the shaft, inserted into a hosel column of the head, and fixed to the hosel column, wherein:   the hosel column includes a dividing member;   a threaded ring including a plurality of threads provided on an inner periphery of an inner hole of the threaded ring is provided on an upper side of the dividing member, the threads extending in an axis center direction of the inner hole;   the shaft case includes a convex axis member provided at a top end of the shaft case;   the convex axis member has a prism shape, or includes convex threads that extend in an axis center direction on an outer periphery of the convex axis member;   the convex axis member is inserted in the inner hole of the threaded ring, and any one of corner edges of the convex axis member and the convex threads connect with the threads of the threaded ring; and   a bolt that is inserted into a bolt insertion hole provided to the dividing member from a sole side of the head is screwed into the shaft case, whereby the shaft case is fixed to the hosel column.   
     
     
         2 . The golf club according to  claim 1 , wherein:
 the convex axis member includes a female screw hole on a top end face of the convex axis member; and   the bolt is screwed into the female screw hole.   
     
     
         3 . The golf club according to  claim 1 , wherein
 an axis center of the shaft is in a slanting direction with respect to an axis center of the cylindrical-shaped shaft case.   
     
     
         4 . The golf club according to  claim 1 , wherein
 the axis center of the shaft is parallel to an axis center of the cylindrical-shaped shaft case.   
     
     
         5 . The golf club according to  claim 1 , wherein
 the threads of the threaded ring include threads that have different depths from an upper end of the ring.   
     
     
         6 . The golf club according to  claim 2 , wherein
 an axis center of the shaft is in a slanting direction with respect to an axis center of the cylindrical-shaped shaft case.   
     
     
         7 . The golf club according to  claim 2 , wherein
 the axis center of the shaft is parallel to an axis center of the cylindrical-shaped shaft case.   
     
     
         8 . The golf club according to  claim 2 , wherein
 the threads of the threaded ring include threads that have different depths from an upper end of the ring.