| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf club providing a stabilized ball hitting direction and distance. <P>SOLUTION: The golf club has a metallic club head 10 in a hollow structure, in which a face part 12 forming a ball hitting surface is disposed on the front surface. On the back surface of the face part 12, a bulge part 30, having a center thick part 32, a plurality of ribs 34, 36, 38 and 40 extended in the radial direction from the center thick part 32 to the peripheral edge part, and a rib 56 annularly surrounding the center thick part, is formed. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
