| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a golf club that relatively easily can carry a ball in a targeted direction, is easy to use, and makes a beginner or middle-level golfer feel easy with it. SOLUTION: The peripheral edge of a face 11 projects beyond the striking face of a sweet spot area 17 in a target direction. The degree of projection of the face 11 gradually expands in the form of a prescribed gentle curved surface, for example a spherical, elliptical, parabolic surface of rotation or hyperbolic surface of rotation from the peripheral edge of the sweet spot area 17 to the outer edge 15 of the face 11.</p> |
