| 摘要 |
<p>PURPOSE:To provide a golf club head having a reinforced larger face to carry a ball farther without in creasing its weight. CONSTITUTION:Ribs 4 are additionally provided only between the upper part inside a face surface 1 of a head and an end of the face surface 1 side inside a crown part 3. The joining surface of the rib 4 to the face surface 1 side and the joining part of the rib to the crown surface 3 side have a width of 2mm-15mm and a thickness of 0.5mm-5mm.</p> |
