Golf club head

Abstract

A weight material is provided on a heel side of a hosel portion in a golf club head. A convex portion E is provided on the heel side of the head. The weight material is disposed within the convex portion. The weight material is made of high specific gravity metal such as tungsten, and welded on both a lower column and a skirt portion.

1 . A golf club head comprising:
 a hollow main body; and   a hosel portion that penetrates through at least one of an upper face of the main body on a heel side and an upper side of a side face of the main body on the heel side,   wherein the hosel portion includes a column portion, the column portion including a heel portion and a toe portion,   wherein the specific gravity of the heel portion is greater than a specific gravity of the toe portion.   
   
   
       2 . A golf club head comprising:
 a hollow main body; and   a hosel portion that penetrates through at least one of an upper face of the main body on a heel side and an upper side of a side face of the main body on the heel side,   wherein at least a part of the side face of the main body on the heel side includes a weight member.   
   
   
       3 . The golf club head according to  claim 2 , wherein
 a part of the side face of the main body on the heel side includes a convex portion protruding outwards, and   at least a part of the convex portion includes the weight member.   
   
   
       4 . The golf club head according to  claim 2 , wherein
 the main body is a metallic cast product,   the weight member is made of metal, and   the weight member is cast into the main body.   
   
   
       5 . The golf club head according to  claim 2 , wherein at least a part of the side face of the main body on the heel side is made of fiber reinforced plastic. 
   
   
       6 . The golf club head according to  claim 5 , wherein
 the part of the side face on the heel side made of fiber reinforced plastic includes a first layer and a second layer, and   the weight member is disposed between the first layer and the second layer.   
   
   
       7 . The golf club head according to  claim 6 , wherein the weight member is made of fiber reinforced plastic containing metal powder. 
   
   
       8 . The golf club head according to  claim 6 , wherein the weight member includes a metal piece. 
   
   
       9 . The golf club head according to  claim 2 , wherein the main body and the hosel portion are made of metal. 
   
   
       10 . The golf club head according to  claim 2 , wherein the specific gravity of the weight member is greater than a specific gravity of the hollow main body.