Golf club head

Abstract

A golf club head includes a face portion disposed on a front face of a golf club head for hitting a golf ball and a sole portion formed on a lower portion of the golf club head. The sole portion includes a recessed deformation portion. The deformation portion includes a deformation-starting section, a deformation-ending section, and a maximum deformation section between the deformation-starting section and the deformation-ending section. A thickness of the deformation-starting section and a thickness of the deformation-ending section decrease toward the maximum deformation section so that the maximum deformation section has the smallest thickness allowing elastic deformation, thereby increasing elastic deforming capability of the sole portion.

1 . A golf club head comprising: 
 a face portion disposed on a front face of a golf club head for hitting a golf ball; and    a sole portion formed on a lower portion of the golf club head, the sole portion comprising a recessed deformation portion, the deformation portion comprising a deformation-starting section, a deformation-ending section, and a maximum deformation section between the deformation-starting section and the deformation-ending section, a thickness of the deformation-starting section and a thickness of the deformation-ending section decreasing toward the maximum deformation section so that the maximum deformation section has the smallest thickness allowing elastic deformation, thereby increasing elastic deforming capability of the sole portion.    
   
   
       2 . The golf club head as claimed in  claim 1 , wherein the deformation portion extends from a toe portion of the golf club head to a heel portion of the golf club head.  
   
   
       3 . The golf club head as claimed in  claim 1 , wherein the deformation portion protrudes toward a blade of the golf club head.  
   
   
       4 . The golf club head as claimed in  claim 1 , wherein the deformation portion is near the face portion.  
   
   
       5 . The golf club head as claimed in  claim 1 , wherein the deformation portion is an elongated groove.  
   
   
       6 . The golf club head as claimed in  claim 1 , wherein the sole portion comprises a flat inner face and a flat outer face, and wherein the deformation portion is formed on the flat outer face adjacent to the face portion.  
   
   
       7 . The golf club head as claimed in  claim 1 , wherein the deformation portion comprises a plurality of recesses in an outer face thereof for increasing elastic deforming capability of the deformation portion.  
   
   
       8 . The golf club head as claimed in  claim 1 , wherein the deformation portion comprises a plurality of protrusions on an outer face thereof for enhancing structural strength of the deformation portion.  
   
   
       9 . The golf club head as claimed in  claim 1 , wherein the golf club head is a head of one of an iron club, a wood club, and a utility golf club.