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    • 12. 发明专利
    • Golf ball
    • 高尔夫球
    • JP2014140638A
    • 2014-08-07
    • JP2013245667
    • 2013-11-28
    • Dunlop Sports Co Ltdダンロップスポーツ株式会社
    • KIM HYOUNGCHOLONUKI MASAHIDE
    • A63B37/00A63B37/04
    • A63B37/0006A63B37/0007A63B37/0008A63B37/0009A63B37/0012A63B37/0018A63B37/002A63B37/0021A63B37/0077A63B37/0084A63B37/0089A63B37/009A63B37/0096G06T17/20
    • PROBLEM TO BE SOLVED: To provide a golf ball 2 excellent in flight performance.SOLUTION: A golf ball 2 is provided with dimples 8 on its surface in large numbers. The trajectory of this ball 8 is divided into a first section, a second section, a third section and a fourth section. A mean value CD1 of the drag coefficient CD of the first section is 0.225 or less, and a mean value CL1 of the lift coefficient CL of the first section is 0.180 or less. A mean value CD2 of the drag coefficient CD of the second section is 0.250 or less, and a mean value CL2 of the lift coefficient CL of the second section is 0.220 or less. A mean value CD3 of the drag coefficient CD of the third section is 0.260 or more, and a mean value CL3 of the lift coefficient CL of the third section is 0.220 or more. A mean value CD4 of the drag coefficient CD of the fourth section is 0.250 or more, and a mean value CL4 of the lift coefficient CL of the fourth section is 0.200 or more.
    • 要解决的问题:提供飞行性能优异的高尔夫球2.解决方案:高尔夫球2在其表面上大量设置有凹坑8。 该球8的轨迹被分为第一部分,第二部分,第三部分和第四部分。 第一部分的阻力系数CD的平均值CD1为0.225以下,第一部分的升力系数CL的平均值CL1为0.180以下。 第二部分的阻力系数CD的平均值CD2为0.250以下,第二部分的升力系数CL的平均值CL2为0.220以下。 第三部分的阻力系数CD的平均值CD3为0.260以上,第三部分的升力系数CL的平均值CL3为0.220以上。 第四部分的阻力系数CD的平均值CD4为0.250以上,第四部分的升力系数CL的平均值CL4为0.200以上。
    • 20. 发明专利
    • Golf ball
    • 高尔夫球
    • JP2013248262A
    • 2013-12-12
    • JP2012126211
    • 2012-06-01
    • Dunlop Sports Co Ltdダンロップスポーツ株式会社
    • SAJIMA TAKAHIRONAKAMURA HIROTAKA
    • A63B37/00A63B37/04
    • PROBLEM TO BE SOLVED: To provide a golf ball 2 having excellent flying performance and controllability on driver shots.SOLUTION: A golf ball 2 includes a spherical core 4 and a cover 6 covering the core 4. The cover 6 includes an inner cover 8 and an outer cover 10 positioned outside the inner cover 8. When distances (%) from a central point to nine points and JIS-C hardnesse at the nine points which are obtained by dividing a region from the central point to a surface of the core 4 at intervals of 12.5% of a radius of the core 4 are plotted in a graph, Rof a linear approximation curve obtained by a least-square method is 0.95 or larger. The hardness of an innermost layer of the cover 6 is equal to or lower than the surface hardness of the core 4. Preferably, the core is obtained by being crosslinked with a rubber composition. The rubber composition includes (d) an acid and/or a salt.
    • 要解决的问题:提供一种具有优异的飞行性能和驾驶员照射的可控性的高尔夫球2.解决方案:高尔夫球2包括球形芯4和覆盖芯体4的盖6.盖6包括内盖8和 位于内盖8外侧的外盖10.当从中心点到核心4的表面的区域从中心点到九点的距离(%)和在九个点处的JIS-C硬度为 核心4的半径的12.5%的间隔以曲线图表示,通过最小二乘法得到的线性近似曲线的Rof为0.95以上。 盖6的最内层的硬度等于或低于芯4的表面硬度。优选地,芯通过与橡胶组合物交联而获得。 橡胶组合物包括(d)酸和/或盐。