Title:
GOLF BALL
Document Type and Number:
Japanese Patent JP2023183740
Kind Code:
A
Abstract:
To provide a golf ball capable of improving a carry in a sure manner with a configuration in which bottom surfaces of dimples are curved convexly toward an outside direction of the golf ball.SOLUTION: A golf ball of the present invention includes a core and a cover positioned outside the core having a plurality of dimples 10 on a surface. A bottom surface 12 of the dimple includes a first convex part 13A curved convexly toward a ball outside direction and a second convex part 13B further curved convexly toward the ball outside direction in a planar region of the first convex region. A diameter of a circular border 16 of the first convex part and the second convex part is half or less of a diameter of the circular planar region 17 of the first convex part. Relationships between Shore D hardness H of a cover material and a depth d (unit; mm) in the central convex part of the bottom surface of the dimple satisfy a following formula 1; (H-78)/(-300)>d.SELECTED DRAWING: Figure 2
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Inventors:
KOMATSU ATSUSHI
Application Number:
JP2022097409A
Publication Date:
December 28, 2023
Filing Date:
June 16, 2022
Export Citation:
Assignee:
BRIDGESTONE SPORTS CO LTD
International Classes:
A63B37/00
Attorney, Agent or Firm:
Shoichi Okuyama
Ayako Nakamura
Soji Morimoto
Yu Tanaka
Kohei Arihara
Ayako Nakamura
Soji Morimoto
Yu Tanaka
Kohei Arihara