Golf club head

Abstract

A golf club head comprises a head main body having a hollow therein and a weight member having a specific gravity more than that of the head main body. The head main body has a face portion for hitting a ball and a sole portion continuous from the face portion to form a bottom surface of the club head. The weight member is disposed in the hollow and extends in the toe-heel direction. In a vertical cross section of the club head including the sweet spot, the weight member is arranged without contacting with the face portion and the sole portion.

1 . A golf club head comprising
 a head main body having a hollow therein, the head main body comprising a face portion and a sole portion extending from the face portion and defining a bottom surface of the club head, and   a weight member disposed in the hollow, the weight member extending in a toe-heel direction of the head across a vertical plane including the sweet spot of the head and being substantially parallel with the front-back direction of the head such that, in the vertical plane, the weight member does not contact the face portion and the sole portion.   
     
     
         2 . The golf club head according to  claim 1 , wherein
 in the vertical plane, the weight member is disposed in a corner portion between the face portion and the sole portion.   
     
     
         3 . The golf club head according to  claim 1 , wherein
 in the vertical plane, a centroid of a cross section of the weight member is positioned on a face portion side of the center of gravity of the head.   
     
     
         4 . The golf club head according to  claim 1 , wherein
 in the vertical plane, a centroid of a cross section of the weight member is positioned on a sole portion side of the center of gravity of the head.   
     
     
         5 . The golf club head according to  claim 1 , wherein
 in the vertical plane, an entire cross section of the weight member is positioned on a sole portion side of the center of gravity of the head and on a face portion side of the center of gravity of the head.   
     
     
         6 . The golf club head according to  claim 1 , wherein
 the weight member is spaced apart from the sole portion continuously in the toe-heel direction between both end portions of the weight member.   
     
     
         7 . The golf club head according to  claim 1 , wherein
 a toe-side portion and a heel-side portion of the weight member are fixed to the head main body.   
     
     
         8 . The golf club head according to  claim 7 , wherein
 the head main body comprises a crown portion being continuous from the face portion and defining a top surface of the club head, and a side portion extending between the crown portion and the sole portion, and   the weight member comprises a toe-side end face fixed to a toe-side part of the side portion, and a heel-side end face fixed to a heel-side part of the side portion.   
     
     
         9 . The golf club head according to  claim 7 , wherein
 the weight member comprises a toe-side end fixed to a toe-side part of the sole portion, and a heel-side end fixed to a heel-side part of the sole portion.   
     
     
         10 . The golf club head according to  claim 1 , wherein
 the area of the cross section of the weight member is increased toward its center in the toe-heel direction from its toe-side and from its heel-side.   
     
     
         11 . The golf club head according to  claim 1 , wherein
 the weight member is fixed to the head main body by the use of a screw.   
     
     
         12 . The golf club head according to  claim 1 , which comprises an adjusting mechanism for changing the position of the weight member in one of the front-back direction, up-down direction and toe-heel direction of the head. 
     
     
         13 . The golf club head according to  claim 1 , which comprises an adjusting mechanism for changing the position of the weight member in two of the front-back direction, up-down direction and toe-heel direction of the head. 
     
     
         14 . The golf club head according to  claim 1 , wherein
 The weight member is welded to the head main body.   
     
     
         15 . The golf club head according to  claim 1 , wherein
 the weight member and the head main body are integrally formed by casting.