Golf club

Abstract

A golf club includes: a shaft ( 4 ); an adapter ( 3 ) having a shaft inserting portion ( 9 ) disposed with a shaft inserting hole ( 13 ) at one end for fixing the shaft ( 4 ) and at the other end a fixing portion ( 7 ) which is integrally disposed with the shaft inserting portion ( 9 ) with a central axis thereof deviated from a central axis of the shaft inserting portion ( 9 ) and is disposed with a concave portion ( 12 ) at least at a part of a circumferential wall surface thereof; a club head ( 1 ) including a hosel portion ( 2 ) disposed with a hosel hole ( 5 ) for inserting the adapter ( 3 ) and a through hole ( 10 ) extending from a hosel outer wall to the hosel hole ( 5 ) and located at a position corresponding to the concave portion ( 12 ) of the fixing portion ( 7 ); and a retaining means ( 11 ) passing through the through hole ( 10 ) to press the concave portion ( 12 ) so as to prevent the shaft ( 4 ) from dropping out.

1 . A golf club, comprising:
 a shaft;   an adapter having a shaft inserting portion disposed with a shaft inserting hole at one end for fixing said shaft and at the other end a fixing portion which is integrally disposed with said shaft inserting portion with a central axis thereof deviated from a central axis of said shaft inserting portion and is disposed with a concave portion at least at a part of a circumferential wall surface thereof;   a club head including a hosel portion disposed with a hosel hole for inserting said adapter and a through hole extending from a hosel outer wall to the hosel hole and located at a position corresponding to said concave portion of said fixing portion; and   a retaining means passing through said through hole to press said concave portion so as to prevent the shaft from dropping out.   
     
     
         2 . The golf club according to  claim 1 , wherein a portion of a bottom surface of said concave portion contacted by said retaining means is disposed with an inclination surface which inclines deeper as the inclination surface goes closer to the shaft inserting portion. 
     
     
         3 . The golf club according to  claim 1 , wherein
 said fixing portion is disposed at a position eccentric relative to the central axis of said shaft inserting portion, and   said concave portion is disposed at a side wall of said fixing portion positioned to the side of the central axis of said shaft inserting portion.   
     
     
         4 . The golf club according to  claim 1 , wherein
 said hosel hole includes an upper portion fitting with said shaft inserting portion, and a lower portion fitting with said fixing portion, and   said hosel portion is further provided with a wall portion which defines a part of a lower end of said upper portion and a part of an upper end of said lower portion, and is contactable with a tip end of said shaft inserting portion.   
     
     
         5 . The golf club according to  claim 1 , wherein
 said retaining means is a fixing member having a thread portion.   
     
     
         6 . The golf club according to  claim 1 , wherein
 said retaining means includes:   a main body portion; and   a protrusion portion axially protruding from a tip end of the main body portion in the direction, having a smaller radius than said main body portion, and capable of pressing said concave portion.