GOLF CLUB HEAD
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°.