Golf club head

Abstract

A golf club head of this invention includes a head body, a weight member attached to the head body, and a fixing unit to fix the weight member at one of a plurality of attachment positions of the head body. The plurality of attachment positions are located on a plane. The plane includes the center-of-gravity position of the head body without the weight member attached thereto and the axis of a shaft to be attached to the golf club head.

1 . A golf club head comprising:
 a head body;   a weight member attached to said head body; and   fixing means for fixing said weight member at any one of a plurality of attachment positions of said head body,   wherein the plurality of attachment positions are located on a plane, and   the plane includes a center-of-gravity position of said head body without said weight member attached thereto and an axis of a shaft to be attached to the golf club head.   
     
     
         2 . The head according to  claim 1 , wherein said fixing means comprises:
 a plurality of first screw portions which are provided in a sole portion of said head body and define the plurality of attachment positions; and   a second screw portion which is provided in said weight member and threadably engages with one of said plurality of first screw portions.   
     
     
         3 . The head according to  claim 1 , further comprising a rail portion which is formed along a straight line included in the plane in said sole portion of said body and defines the plurality of attachment positions,
 wherein said fixing means fixes said weight member at a given position on said rail portion.   
     
     
         4 . The head according to  claim 3 , wherein said rail portion comprises:
 a groove open at a lower part thereof, which is formed along the straight line and forms an accommodation space to accommodate said weight member;   a partitioned chamber closed at an upper part thereof, which is formed along the straight line in an upper portion of said groove;   a partitioning portion which is provided between said groove and said partitioned chamber and vertically partitions the space into said groove and said partitioned chamber; and   a slit which is formed along the straight line in said partitioned chamber and makes the space in said groove communicate with said partitioned chamber, and   said fixing means comprises:   a slide member which is accommodated in said partitioned chamber such that said slide member can move along the straight line, and connected to said weight member through said slit; and   screw portions which are respectively provided in said slide member and said weight member, and threadably engage with each other.   
     
     
         5 . The head according to  claim 1 , wherein a change amount of center-of-gravity depth of the golf club head caused by a difference between the attachment positions used to fix said weight member is not less than 3 mm. 
     
     
         6 . The head according to  claim 1 , wherein said weight member comprises a plurality of weight members having different weights. 
     
     
         7 . The head according to  claim 1 , further comprising a resin member which is inserted between said head body and said weight member at the attachment position. 
     
     
         8 . The head according to  claim 7 , wherein said resin member is integrally provided in said weight member. 
     
     
         9 . The head according to  claim 1 , wherein said weight member is fixed to said sole portion of said head body,
 said sole portion includes a recess formed in the attachment position of said weight member, and   a depth of said recess is set such that a lowest portion of said weight member fixed to said head body is positioned above a lowest portion of said sole portion.