GOLF CLUB HEAD HAVING FACE GROOVES

摘要

PROBLEM TO BE SOLVED: To enhance the stability of the trajectory of a hit ball by specifying the arrangement of the face grooves of the club-face of a golf club and increasing the intervals of the linear or dotty face grooves over the entire surface or the surface exclusive of the specified range near a sweet spot toward the lower part from the upper part of the club-face in particular. SOLUTION: The face surface of the golf club head is inscribed with the plural number of linear grooves by the straight lines intermitting in a horizontal direction. At this time, the club-face is provided with the face grooves of the Yj-th rows from the first row in the longitudinal direction. The point on the extension line of the sweet spot in a transverse direction is the 0-th column and the (-1-th column)... the (-Xi-th column) are constituted toward a left direction and the (+1-th column)... the (+Xi-th column) are constituted toward a right direction. These face grooves are arrayed in the state in which the arbitrary groove column Xi (Xi=K) satisfies H(k, 1)<=H(k, 2)<=...<=H(k, Yj), provided that H(k, Yj)