| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a golf ball with excellent durability and moldability, and capable of providing soft feeling at the time of hitting. <P>SOLUTION: The golf ball has a core 3 and a cover 5 covering the surface of the core, and a number of dimples 7 and 9 consisting of a plurality of groups with different diameters are formed on the surface of the cover 5. The dimples 7 and 9 are formed inside the cover layer, and at least the dimple 9 with a larger diameter among a number of dimples, comprises a peripheral edge surface 9a becoming gradually deeper from the peripheral edge toward the center of the dimple in the shape of a recessed curved plane and a center surface 9b extending continuously from the peripheral edge surface 9a in the shape of a concentric sphere at the depth within the thickness of the layer of the cover 5. <P>COPYRIGHT: (C)2004,JPO</p> |
