Golf club head
A face portion of a head includes a striking face constituting an outer surface of the face portion, a face inner surface constituting an inner surface of the face portion, and a face thickness. The striking face includes a face center. The face portion includes: a face central thin-wall section including the face center; a toe thick-wall section thicker than the face central thin-wall section, positioned spaced 8 mm or more apart from the face center toward a toe side, and extending in an up-down direction; and a heel thick-wall section thicker than the face central thin-wall section, positioned spaced 8 mm or more apart from the face center toward a heel side, and extending in the up-down direction. The toe thick-wall section and the heel thick-wall section extend to a position that does not reach an outer edge of the face portion.
1 . A golf club head comprising:
a face portion;
a crown portion;
a sole portion; and
a hosel portion, wherein
the face portion includes a striking face that constitutes an outer surface of the face portion, a face inner surface that constitutes an inner surface of the face portion, and a face thickness that is defined as a distance between the striking face and the face inner surface,
the striking face includes a face center,
the face portion includes: as a distribution of the face thickness, a face central thin-wall section that includes the face center; a toe thick-wall section that is thicker than the face central thin-wall section, that is positioned spaced 8 mm or more apart from the face center toward a toe side, and that extends in an up-down direction; and a heel thick-wall section that is thicker than the face central thin-wall section, that is positioned spaced 8 mm or more apart from the face center toward a heel side, and that extends in the up-down direction,
the toe thick-wall section extends to a position that does not reach an outer edge of the face portion,
the heel thick-wall section extends to a position that does not reach the outer edge of the face portion,
a proportion of an up-down directional length of the toe thick-wall section to an up-down directional width of the striking face is greater than or equal to 50% and less than or equal to 90%, and
a proportion of an up-down directional length of the heel thick-wall section to the up-down directional width of the striking face is greater than or equal to 50% and less than or equal to 90%.
2 . The golf club head according to claim 1 , wherein
the toe thick-wall section is contiguous with a toe side of the face central thin-wall section, and
the heel thick-wall section is contiguous with a heel side of the face central thin-wall section.
3 . The golf club head according to claim 1 , wherein
a maximum value of the face thickness in the toe thick-wall section and a maximum value of the face thickness in the heel thick-wall section are 0.2 mm or more greater than the face thickness at the face center.
4 . The golf club head according to claim 1 , wherein
the face thickness of the face central thin-wall section is less than or equal to 3.2 mm.
5 . The golf club head according to claim 1 , wherein
the toe thick-wall section has a face-peripheral contour line, the face-peripheral contour line extending along a first circle that has its center at the face center or in a vicinity of the face center,
the toe thick-wall section has a face-central contour line, the face-central contour line extending along a second circle that has its center at the face center or in the vicinity of the face center and that has a radius smaller than a radius of the first circle,
the heel thick-wall section has a face-peripheral contour line, the face-peripheral contour line extending along a third circle that has its center at the face center or in the vicinity of the face center, and
the heel thick-wall section has a face-central contour line, the face-central contour line extending along a fourth circle that has its center at the face center or in the vicinity of the face center and that has a radius smaller than a radius of the third circle.
6 . The golf club head according to claim 1 , wherein the up-down directional width of the striking face is measured at a position of the face center.
7 . The golf club head according to claim 6 , wherein
when the up-down directional length of the toe thick-wall section is denoted by W 1 , and a toe-heel directional length of the toe thick-wall section is denoted by W 2 , then W 2 /W 1 is greater than or equal to 0.38 and less than or equal to 0.50, and
when the up-down directional length of the heel thick-wall section is denoted by W 3 , and a toe-heel directional length of the heel thick-wall section is denoted by W 4 , then W 4 /W 3 is greater than or equal to 0.40 and less than or equal to 0.54.
8 . The golf club head according to claim 1 , wherein
the face thickness of the toe thick-wall section is greater than or equal to 2.8 mm and less than or equal to 3.8 mm, and
the face thickness of the heel thick-wall section is greater than or equal to 2.8 mm and less than or equal to 3.8 mm.
9 . The golf club head according to claim 1 , wherein
a distance between the toe thick-wall section and the heel thick-wall section in a toe-heel direction is greater than or equal to 20 mm and less than or equal to 40 mm.
10 . A golf club head comprising:
a face portion;
a crown portion;
a sole portion; and
a hosel portion, wherein
the face portion includes a striking face that constitutes an outer surface of the face portion, a face inner surface that constitutes an inner surface of the face portion, and a face thickness that is defined as a distance between the striking face and the face inner surface,
the striking face includes a face center,
the face portion includes: as a distribution of the face thickness, a face central thin-wall section that includes the face center; a toe thick-wall section that is thicker than the face central thin-wall section, that is positioned spaced 8 mm or more apart from the face center toward a toe side, and that extends in an up-down direction; and a heel thick-wall section that is thicker than the face central thin-wall section, that is positioned spaced 8 mm or more apart from the face center toward a heel side, and that extends in the up-down direction,
the toe thick-wall section extends to a position that does not reach an outer edge of the face portion,
the heel thick-wall section extends to a position that does not reach the outer edge of the face portion,
a proportion of an up-down directional length of the toe thick-wall section to an up-down directional width of the striking face is greater than or equal to 50% and less than or equal to 90%,
a proportion of an up-down directional length of the heel thick-wall section to the up-down directional width of the striking face is greater than or equal to 50% and less than or equal to 90%,
when the face central thin-wall section has an area that is denoted by S 1 , the toe thick-wall section has an area that is denoted by S 2 , and the heel thick-wall section has an area that is denoted by S 3 , then S 2 /S 1 is greater than or equal to 0.48 and less than or equal to 0.60, and S 3 /S 1 is greater than or equal to 0.36 and less than or equal to 0.48.
11 . The golf club head according to claim 10 , wherein when the striking face has an area that is denoted by S 10 , S 1 /S 10 is greater than or equal to 0.15 and less than or equal to 0.30.
12 . The golf club head according to claim 10 , wherein
the toe thick-wall section is contiguous with a toe side of the face central thin-wall section, and
the heel thick-wall section is contiguous with a heel side of the face central thin-wall section.
13 . The golf club head according to claim 10 , wherein a maximum value of the face thickness in the toe thick-wall section and a maximum value of the face thickness in the heel thick-wall section are 0.2 mm or more greater than the face thickness at the face center.
14 . The golf club head according to claim 10 , wherein the up-down directional width of the striking face is measured at a position of the face center.
15 . The golf club head according to claim 10 , wherein the face thickness of the face central thin-wall section is less than or equal to 3.2 mm.
16 . The golf club head according to claim 10 , wherein
the toe thick-wall section has a face-peripheral contour line, the face-peripheral contour line extending along a first circle that has its center at the face center or in a vicinity of the face center,
the toe thick-wall section has a face-central contour line, the face-central contour line extending along a second circle that has its center at the face center or in the vicinity of the face center and that has a radius smaller than a radius of the first circle,
the heel thick-wall section has a face-peripheral contour line, the face-peripheral contour line extending along a third circle that has its center at the face center or in the vicinity of the face center, and
the heel thick-wall section has a face-central contour line, the face-central contour line extending along a fourth circle that has its center at the face center or in the vicinity of the face center and that has a radius smaller than a radius of the third circle.
17 . The golf club head according to claim 10 , wherein
when the up-down directional length of the toe thick-wall section is denoted by W 1 , and a toe-heel directional length of the toe thick-wall section is denoted by W 2 , then W 2 /W 1 is greater than or equal to 0.38 and less than or equal to 0.50, and
when the up-down directional length of the heel thick-wall section is denoted by W 3 , and a toe-heel directional length of the heel thick-wall section is denoted by W 4 , then W 4 /W 3 is greater than or equal to 0.40 and less than or equal to 0.54.
18 . The golf club head according to claim 10 , wherein
the face thickness of the toe thick-wall section is greater than or equal to 2.8 mm and less than or equal to 3.8 mm, and
the face thickness of the heel thick-wall section is greater than or equal to 2.8 mm and less than or equal to 3.8 mm.
19 . The golf club head according to claim 10 , wherein a distance between the toe thick-wall section and the heel thick-wall section in a toe-heel direction is greater than or equal to 20 mm and less than or equal to 40 mm.