Golf club head

Abstract

A hollow club head having a head body 14 and a face member 16 bonded to the face opening 12 of the head body 14 is provided, wherein the W/H ratio between the maximum height H (mm) and maximum width W (mm) of the face member is in the range of 1.0 to 1.7, so as to improve cost efficiency associated with improved repulsive speeds of balls hit by the club.

1 . A club head comprising a hollow head body having a face opening at the face portion and a face member that closes the face opening, wherein a W/H ratio of a maximum width W to a maximum height H of the face member is in a range of 1.0 to 1.7.  
     
     
         2 . The club head according to  claim 1 , wherein the maximum height H of the face member is in the range of 47 to 65 mm.  
     
     
         3 . The club head according to  claim 1 , wherein the maximum width of the face member is in the range of 47 to 110 mm.  
     
     
         4 . The club head according to  claim 1 , wherein the maximum height L of the face portion is in a range of 53 to 65 mm.  
     
     
         5 . The club head according to  claim 1 , wherein one or both of the top and bottom edges of the face member are extended beyond the face portion.  
     
     
         6 . The club head according to  claim 1 , wherein a distance between a centroid of the face member and a point on the face portion onto which a center of gravity of the head is projected along a line that is normal to the face portion is in the range of 0 to 5 mm.  
     
     
         7 . The club head according to  claim 1 , wherein the head body is formed by casting and the face member is formed by forging or press-forming.  
     
     
         8 . The club head according to  claim 1 , wherein the head body and face member are welded together using plasma, laser or an electron beam.  
     
     
         9 . The club head according to  claim 7 , wherein a gap between the head body and face member is filled with a metallic material that is different from materials of the head body and face member.  
     
     
         10 . The club head according to  claim 1 , wherein a volume of the club head is in the range of 340 to 460 cm 3 .  
     
     
         11 . The club head according to  claim 1 , wherein the club is made of a metallic material and a non-metallic material.  
     
     
         12 . The club head according to  claim 1 , wherein a back of the face member has an inclined portion where a thickness of the face member varies.  
     
     
         13 . The club head according to  claim 12 , wherein a region having a maximum thickness and a region having a minimum thickness are formed on the back of the face member, with an inclined portion being provided between the two regions.  
     
     
         14 . The club head according to  claim 13 , wherein the thickness of the inclined portion changes either continuously or discontinuously with respect to any of the two regions or within the inclined portion.  
     
     
         15 . The club head according to  claim 12 , wherein the inclined portion is formed outside the region having the maximum thickness, while the region having the minimum thickness is formed outside the inclined part.