JPWO2013111263A1 - Golf ball - Google Patents

Abstract

Provided is a golf ball having improved flight distance by improving aerodynamic characteristics by devising dimples. A spherical surface 101 is composed of a dimple 102 and a land 103 excluding the dimple 102, and the dimple 102 is a golf ball 100 in which a circular dimple 105 is formed together with an elliptical dimple 104. The dimple 104 is overlapped with the circular dimple 105 at each of the longitudinal end portions 104a and 104b thereof, the circular dimple 105 and the elliptical dimple 104 communicate with each other, and the one land 103 includes the three lands 103. It is formed between the elliptical dimples 104, 104, 104.

Description

  The present invention relates to an improvement in the arrangement of dimples and lands on the surface of a sphere, particularly in a golf ball.

  Conventionally, a golf ball has a plurality of dimples arranged on the surface of the golf ball in order to increase the aerodynamic characteristics (lift / drag) by reducing the drag and increasing the lift. For example, the surface shape of the dimple is made into a non-circular shape such as an ellipse (Patent Documents 1 and 4), or a dimple is provided with a convex part or a concave part (Patent Document 2), or the dimples are connected by a groove. Configurations (Patent Documents 3 and 5) have been proposed.

JP-A-8-191905 JP-A-8-238336 JP-A-8-276035 Utility Model Registration No. 3157248 International publication WO2010-143655 JP 2000-317014 JP

  An object of the present invention is to provide a golf ball that has improved aerodynamic characteristics and improved flight distance by devising dimples.

In order to solve the above-mentioned problems, the present invention provides a golf ball in which a spherical surface is constituted by lands excluding dimples and dimples, and the dimples are formed with circular dimples together with elliptical dimples,
The one elliptical dimple is superposed on the circular dimple at both ends in the major axis direction, and the circular dimple and the elliptical dimple communicate with each other;
The one land is formed between the three elliptical dimples,
A golf ball was adopted.

  Therefore, this golf ball has an elliptical dimple together with the circular dimple, unlike the golf ball having a conventional circular dimple formed thereon, and the elliptical dimple is polymerized with respect to the circular dimple, and the elliptical dimple and the circular dimple are combined. Since they are in communication with each other, the aerodynamic characteristics (lift / drag) can be increased and the flight distance can be improved while suppressing an increase in the spin amount of the golf ball.

It is a schematic front view which shows the 1st embodiment of this invention. It is the principal part expanded sectional view of the aa line in FIG. It is a schematic front view which shows the 2nd embodiment of this invention. It is the principal part expanded sectional view of the bb line in FIG. It is a schematic front view which shows the 3rd embodiment of this invention. It is the principal part expanded sectional view of the cc line in FIG.

DESCRIPTION OF SYMBOLS 100 Golf ball 101 Sphere surface 102 Dimple 103 Land 104 Elliptical dimple 105 Circular dimple 115 Circular dimple 125 Circular dimple AD Maximum depth of overlapping portion of elliptical dimple with respect to circular dimple BD Maximum depth of central portion of circular dimple CD Maximum depth of the central part of the oval dimple

  In FIGS. 1 and 2, reference numeral 100 denotes a golf ball, and the surface 101 of the sphere is composed of a dimple 102 and a land 103 excluding the dimple 102, and the dimple 102 is formed with an elliptical dimple 104 and a circular dimple 105. .

  In the dimple 102, the one elliptical dimple 104 is overlapped with the circular dimple 105 at both ends 104 a and 104 b in the long axis direction, and the circular dimple 105 and the elliptical dimple 104 communicate with each other.

  On the other hand, the land 103 is formed between the three elliptical dimples 104, 104, 104 in one land 103. Accordingly, one land 103 is surrounded by the peripheral edges of the elliptical dimples 104, 104, 104 except for both ends in the long axis direction of the elliptical dimples 104, 104, 104.

  Therefore, since the golf ball 100 is a golf ball in which the dimple and the land are repeatedly formed in a certain relationship, unlike the golf ball having the conventional circular dimple, the elliptical dimple 104 is used together with the circular dimple 105. In addition, the elliptical dimple 104 is polymerized with respect to the circular dimple 105, and the elliptical dimple 104 and the circular dimple 105 communicate with each other. Therefore, the spin generated when the golf ball 100 is struck The aerodynamic characteristics (lift / drag) can be increased while reducing the amount.

  3 and 4, the golf ball is different in that instead of the circular dimple 105, the surface is a circular dimple 115 having a hexagonal and conical shape. In FIGS. 5 and 6, instead of the circular dimple 105, a circular dimple 125 is obtained by cutting the front end portion of the land 103 at an angle 107.

  By the way, the maximum depth in the overlapping portion of the elliptical dimple relative to the circular dimple is preferably 0.1 to 0.15 mm, and the maximum depth of the central portion of the circular dimple is preferably 0.23 to 0.28 mm. The maximum depth of the central portion of the elliptical dimple is preferably 0.33 to 0.38 mm.

  This golf ball is different from the conventional golf ball in which circular dimples are formed, and has an elliptical dimple together with the circular dimple, and the elliptical dimple is superposed on the circular dimple, and the elliptical dimple and the circular dimple are combined. Since they are in communication with each other, the aerodynamic characteristics (lift / drag) can be increased and the flight distance can be improved while suppressing an increase in the spin amount of the golf ball.

The golf ball of the present invention can be used by golfers from beginners to professionals.

Claims (2)

The surface of the sphere is composed of lands excluding dimples and dimples, and the dimples are golf balls in which circular dimples are formed together with elliptical dimples,
The one elliptical dimple is superposed on the circular dimple at both ends in the major axis direction, and the circular dimple and the elliptical dimple communicate with each other;
The one land is a golf ball formed between the three elliptical dimples. The maximum depth in the overlapping portion of the elliptical dimples relative to the circular dimples is:
0.1 to 0.15 mm,
The maximum depth of the central portion of the circular dimple is 0.23 to 0.28 mm,
The maximum depth of the central part of the elliptical dimple is 0.33 to 0.38 mm
The golf ball according to claim 1, wherein:

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