Golf club head

Abstract

A golf club head includes a front body formed of a metal material, an FRP body, a metallic sole plate, and a weight member. The front body has a face portion, a metal sole portion, a metal side portion (toe), a metal crown portion, a metal side portion (heel), and a hosel portion. A slight gap in a range of 4 mm to 12 mm is formed between a front side of the sole plate and the metal sole portion. This part is formed of the FRP body. Preferably, the weight of the front body is in a range of 20% to 70% of the weight of the golf club head.

1 . A golf club head of a hollow shell structure, comprising: 
 a first member that includes an amorphous metal material and includes a hosel portion, a face portion and an edge portion continuous with the face portion;    a metal plate that is different member from the first member, extends in a direction, which is different from a toe-heel direction of the golf club head, and includes at least a part of sole portion; and    a second member formed of a fiber reinforced plastic, wherein    weight of the first member is in a range of 20% to 70% of weight of the golf club head.    
   
   
       2 . A golf club head of a hollow shell structure, comprising: 
 a first member that includes an amorphous metal material and includes a face portion and an edge portion continuous with the face portion;    a metal plate that is different member from the first member, extends in a direction, which is different from a toe-heel direction of the golf club head, and includes at least a part of sole portion; and    a second member formed of a fiber reinforced plastic, wherein    the first member and the metal plate are apart from each other, and    the second member joints the first member with the metal plate.    
   
   
       3 . The golf club head according to  claim 1 , wherein the amorphous metal material is a zirconium alloy.  
   
   
       4 . The golf club head according to  claim 1 , wherein the non-crystallinity of the amorphous metal material is in a range of 75% to 100% in the face portion.  
   
   
       5 . The golf club head according to  claim 1 , wherein a portion of the second member between the first member and the metal plate recesses from the metal plate and a bottom surface of the first member.  
   
   
       6 . The golf club head according to  claim 1 , wherein the metal plate is made of a metal material, which is larger in specific gravity than the amorphous metal material.  
   
   
       7 . The golf club head according to  claim 2 , wherein the amorphous metal material is a zirconium alloy.  
   
   
       8 . The golf club head according to  claim 2 , wherein the non-crystallinity of the amorphous metal material is in a range of 75% to 100% in the face portion.  
   
   
       9 . The golf club head according to  claim 2 , wherein a portion of the second member between the first member and the metal plate recesses from the metal plate and a bottom surface of the first member.  
   
   
       10 . The golf club head according to  claim 2 , wherein the metal plate is made of a metal material, which is larger in specific gravity than the amorphous metal material.  
   
   
       11 . The golf club head according to  claim 10 , wherein the metal material of the metal plate includes stainless steel.  
   
   
       12 . The golf club head according to  claim 1 , further comprising: 
 a weight member that is fixed to the metal plate and is larger in specific gravity than the metal plate.    
   
   
       13 . The golf club head according to  claim 2 , further comprising: 
 a weight member that is fixed to the metal plate and is larger in specific gravity than the metal plate.    
   
   
       14 . The golf club head according to  claim 12 , wherein the metal plate defines a cylindrical portion to which the weight member is fixed.  
   
   
       15 . The golf club head according to  claim 13 , wherein the metal plate defines a cylindrical portion to which the weight member is fixed.  
   
   
       16 . The golf club head according to  claim 1 , wherein the second member is fixed on the edge portion in a superposed state.  
   
   
       17 . The golf club head according to  claim 2 , wherein the second member is fixed on the edge portion in a superposed state.  
   
   
       18 . The golf club head according to  claim 1 , wherein a back face of the first member is lined with the fiber reinforced plastic.  
   
   
       19 . The golf club head according to  claim 2 , wherein a back face of the face portion is lined with the fiber reinforced plastic.  
   
   
       20 . The golf club head according to  claim 1 , wherein 
 the first member includes a crown portion and a sole portion, and    widths of the crown portion and the sole portion of the first member on a heel side and a toe side are larger than that in a center portion thereof.    
   
   
       21 . The golf club head according to  claim 2 , wherein 
 the first member includes a crown portion and a sole portion; and    widths of the crown portion and the sole portion of the first member on a heel side and a toe side are larger than that in a center portion thereof.    
   
   
       22 . The golf club head according to  claim 1 , wherein 
 volume of the golf club head is in a range of 300 cc to 500 cc; and    the weight of the golf club head is in a range of 180 g to 210 g.    
   
   
       23 . The golf club head according to  claim 2 , wherein volume of the golf club head is in a range of 300 cc to 500 cc; and 
 weight of the golf club head is in a range of 180 g to 210 g.    
   
   
       24 . The golf club head according to  claim 1 , wherein the fiber reinforced plastic includes a carbon fiber reinforced plastic.  
   
   
       25 . The golf club head according to  claim 2 , wherein the fiber reinforced plastic includes a carbon fiber reinforced plastic.  
   
   
       26 . The golf club head according to  claim 18 , wherein the fiber reinforced plastic includes a carbon fiber reinforced plastic.  
   
   
       27 . The golf club head according to  claim 19 , wherein the fiber reinforced plastic includes a carbon fiber reinforced plastic.