| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the flight distance by further lowering the center of gravity and deepening the depth of the center of gravity. SOLUTION: The iron golf club head has a cavity 8 surrounded by ribs 4 to 7 in on the back face 3. On the inner wall surface, facing the cavity 8, of the rib 4 on the sole 9 side, an extended back wall 10A is formed extending along the back face 3 up to near the sole 9. An inclined wall 10B is formed by cutting the inner side of the rib 4 in such way that the wall extends diagonally backwards from the lowest part of the extended back wall 10A and a wedge-shaped second cavity 10 is formed.</p> |
