Golf club head

Abstract

A golf club head including a cup face is provided. The cup face includes a face portion and a rising portion extending from a peripheral edge of the face portion on a rear surface side of the face portion. The peripheral edge of the face portion includes a top line on a top side and a sole line on a sole side. The face portion includes a central region and peripheral regions. The central region includes a face center, extends from the sole line to the top line while being inclined from the sole side to the top side along a direction from the heel side toward the toe side, and does not reach the toe-side edge point. The peripheral regions are thinner than the central region and surround the central region on the toe side and the heel side.

1 . A golf club head comprising a cup face,
 the cup face including
 a face portion for hitting a ball, and 
 a rising portion extending from a peripheral edge of the face portion on a rear surface side of the face portion, 
   the peripheral edge of the face portion including a top line on a top side extending from a toe-side edge point that is a point farthest on a toe side to a heel-side edge point that is a point farthest on a heel side, and a sole line on a sole side extending from the toe-side edge point to the heel-side edge point, and   the face portion including
 a central region including a face center, the central region extending from the sole line to the top line while being inclined from the sole side to the top side along a direction from the heel side toward the toe side, and the central region not reaching the toe-side edge point, and 
 peripheral regions thinner than the central region and surrounding the central region on the toe side and the heel side. 
   
     
     
         2 . The golf club head according to  claim 1 ,
 wherein the central region has
 a thick portion including the face center, and 
 a transition portion located between the thick portion and the peripheral regions, the transition portion being thinner than the thick portion and thicker than the peripheral regions. 
   
     
     
         3 . The golf club head according to  claim 2 , wherein the transition portion gradually decreases in thickness in a direction from the thick portion toward the peripheral regions. 
     
     
         4 . The golf club head according to  claim 3 , wherein the transition portion surrounds an entire circumference of the thick portion. 
     
     
         5 . The golf club head according to  claim 4 ,
 wherein letting θ1 be an angle formed by a toe-heel direction and a line segment passing through a geometrical center of the central region or the thick portion, overlapping the central region, and having a maximum length,   30°≦θ1≦50°.   
     
     
         6 . The golf club head according to  claim 4 , wherein the thick portion is I-shaped. 
     
     
         7 . The golf club head according to  claim 6 , wherein the central region is I-shaped. 
     
     
         8 . The golf club head according to  claim 2 , wherein the transition portion surrounds an entire circumference of the thick portion. 
     
     
         9 . The golf club head according to  claim 8 , wherein the thick portion is I-shaped. 
     
     
         10 . The golf club head according to  claim 2 , wherein the transition portion is continuous with the top line and the sole line. 
     
     
         11 . The golf club head according to  claim 2 , wherein the thick portion is I-shaped. 
     
     
         12 . The golf club head according to  claim 11 , wherein the thick portion is I-shaped having a bulge on at least one side of the toe side and the heel side. 
     
     
         13 . The golf club head according to  claim 1 , wherein the central region is I-shaped. 
     
     
         14 . The golf club head according to  claim 13 , wherein the central region is I-shaped having a bulge on at least one side of the toe side and the heel side. 
     
     
         15 . The golf club head according to  claim 1 ,
 wherein letting θ1 be an angle formed by a toe-heel direction and a line segment passing through a geometrical center of the central region or the thick portion, overlapping the central region, and having a maximum length,   5°≦θ1≦90°.   
     
     
         16 . The golf club head according to  claim 15 ,
 wherein letting θ1 be an angle formed by a toe-heel direction and a line segment passing through a geometrical center of the central region or the thick portion, overlapping the central region, and having a maximum length,   30°≦θ1≦50°.