Golf club

摘要

A golf club has a reverse flex is 80 to 110 mm. The face portion includes a central thick part, a toe-crown-side thin part on a crown-side and on a toe-side of the central thick part, and a heel-sole-side thin part on a sole-side and on a heel-side the central thick part. In the front view of the head, a first straight line passing an area centroid of the toe-crown-side thin part and an area centroid of a back surface of the face portion has an angle θA of 38 to 45 degrees, and a second straight line passing an area centroid of the heel-sole-side thin part and the area centroid of the back surface of the face portion has an angle θB of 40 to 45 degrees, each with respect to the horizontal plane.

主权项

1. A golf club comprising: a golf club shaft; and a golf club head with a hollow structure fixed to a tip end of the golf club shaft and including a face portion having a face for hitting a ball, wherein
the golf club has a reverse flex of 80 to 110 mm, the face portion has an area centroid SG which is that of the back surface of the face portion, and the face portion includes
a central thick part provided in a central region of the face portion, the central thick part having an area of not less than 10% and not more than 35% of the overall area of a back surface of the face portion and the central thick part having a substantially constant thickness largest in the face portion,a toe-crown-side thin part provided on a crown-side and on a toe-side of the central thick part, the toe-crown-side thin part being formed in a region between two straight lines intersecting at an area centroid SG at an angle αA of not less than 30 degrees and not more than 55 degrees, the toe-crown-side thin part having an area of not less than 5% and not more than 9% of the overall area of the back surface of the face portion and the toe-crown-side thin part having a substantially constant thickness smallest in the face portion, anda heel-sole-side thin part provided on a sole-side and on a heel-side the central thick part, the heel-sole-side thin part being formed in a region between two straight lines intersecting at the area centroid SG at an angle αB of not less than 30 degrees and not more than 50 degrees, the heel-sole-side thin part having an area of not less than 3% and not more than 8% of the overall area of the back surface of the face portion and the heel-sole-side thin part having a substantially constant thickness smallest in the face portion, and in a front view of the golf club in its standard state in which the golf club is put on a horizontal plane at a lie angle and loft angle which are specified for the golf club,
a first straight line passing an area centroid of the toe-crown-side thin part and an area centroid of the back surface of the face portion has an angle θA of 38 to 45 degrees with respect to the horizontal plane, anda second straight line passing an area centroid of the heel-sole-side thin part and the area centroid of the back surface of the face portion has an angle θB of 40 to 45 degrees with respect to the horizontal plane.