WO2010143655A1 - 周縁が円弧である非円形ディンプルゴルフボール - Google Patents
周縁が円弧である非円形ディンプルゴルフボール Download PDFInfo
- Publication number
- WO2010143655A1 WO2010143655A1 PCT/JP2010/059762 JP2010059762W WO2010143655A1 WO 2010143655 A1 WO2010143655 A1 WO 2010143655A1 JP 2010059762 W JP2010059762 W JP 2010059762W WO 2010143655 A1 WO2010143655 A1 WO 2010143655A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circular
- golf ball
- dimples
- dimple
- polyhedron
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0007—Non-circular dimples
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0007—Non-circular dimples
- A63B37/0008—Elliptical
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0012—Dimple profile, i.e. cross-sectional view
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/0019—Specified dimple depth
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/0004—Surface depressions or protrusions
- A63B37/002—Specified dimple diameter
Definitions
- This invention relates to a golf ball having non-circular dimples that improve the aerodynamic characteristics of the golf ball.
- a golf ball flies while rotating at a speed of 20 to 70 m / sec. Therefore, a golf ball having a dimple having a circular peripheral edge (hereinafter simply referred to as a circle) has a drag rather than a golf ball having no dimple in this speed region. It is widely recognized that long and long flight distances can be obtained if they are small and given the same initial velocity. It is also widely known that a large circular dimple is preferable at a low speed and a small circular dimple is preferable at a high speed.
- Patent Document 1 proposes a technique in which the surface shape of a dimple is a polygonal shape and a ridge shape is formed at the boundary between adjacent dimples.
- dimples are indispensable anyway, and if necessary, a predetermined plane or ridge portion is provided between adjacent dimples. The idea that it was necessary was dominant.
- golf balls have standards for weight, size, initial speed, symmetry, etc., and there is a system (R & A Rules) that recognizes balls that conform to them, and the coefficient of restitution that affects the initial speed that governs flight distance is constant Is limited to a range of Therefore, various three-piece, four-piece balls and materials have been developed as techniques for increasing the flight distance of a golf ball within a range of a predetermined coefficient of restitution.
- the present inventors have studied the number of layers of balls such as 3 pieces and 4 pieces as well as improvements in the number and size of dimples since the formation of circular dimples in the improvement of balls with a limited coefficient of restitution.
- the present inventors have obtained knowledge that breaks the conventional common sense that circular dimples are the best. That is, forming circular dimples on the surface of a golf ball is necessary to increase lift and decrease drag, but the inventors have found that circular dimples on the surface of a conventional golf ball for a ball that flies while rotating.
- the drag increases as the amount of spin generated there increases.
- it is a phenomenon that often occurs in amateur hitting, but when the hitting surface of the club is not square with respect to the golf ball at the time of hitting, the phenomenon that the degree of hooking or slicing the ball is likely to be enlarged with circular dimples. Invite them.
- the initial velocity of the ball is greatly influenced by the coefficient of restitution of the ball.
- the improvement of the golf ball is to reduce the air resistance during flight in the air, and at the same time, go straight I came to realize that it is important to improve the sex.
- a first object of the present invention is to provide a golf ball in which the lift-drag ratio (lift / drag) can be increased even if the spin rate is increased.
- a second object is to provide a golf ball that is excellent in straight running performance even when the striking surface of the club at the time of striking does not hit the square against the golf ball.
- the present invention has been made on the basis of the new aerodynamic knowledge of the golf ball.
- a golf ball having a spherical surface as a land portion and a plurality of dimples formed in the land portion the plurality of dimples A non-circular dimple partially or entirely surrounded by a peripheral edge formed by a pair of arcs having the same or different curvatures extending along both sides of a ridge line connecting the vertices of the polyhedron inscribed in the sphere, and the non-circular dimple
- a golf ball having a non-circular dimple is characterized in that the major axis of the inscribed polyhedron of the dimple is 1.2 times or more the minor axis perpendicular to the ridge line.
- a non-circular dimple has a ridge and depth that generate turbulent flow at its peripheral edge, unlike a circular dimple, a vortex formed at the peripheral edge of the dimple is formed with a time difference, and the generated vortex is a non-circular dimple.
- the peel width formed on the ball is reduced as shown in FIG. In other words, it is found that the flight distance is improved even at the same initial speed (the same coefficient of restitution).
- the dimple preferably has a peripheral edge in an elliptical shape formed by a pair of arcs having the same curvature.
- the present invention has a pair of identical or different curvatures extending along both sides of the entire ridge line connecting the vertices of the polyhedron inscribed in the sphere on the surface of the sphere (including a pseudo sphere composed of a polyhedron substantially similar to the sphere).
- a non-circular dimple surrounded by a peripheral edge formed by an arc is formed.
- a triangular polyhedron as an example, as shown in FIG. 8, 1.2 times or more, preferably 2 to 10 times, more preferably 2 to 5 times the short axis Ds orthogonal to the ridgeline of the non-circular dimple.
- a plurality of dimples having a peripheral edge having a major axis DL (an axis following a ridge line of a non-circular dimple) are formed.
- the dimple is composed of a pair of arcs 2a and 2b.
- the curvatures of the arcs 2a and 2b are the same, they are elliptical, and when the curvatures of the arcs 2a and 2b are different, they are pseudo-elliptical.
- the depth of the non-circular dimple like the circular dimple, is required to generate a turbulent flow by receiving the air flow around the ball, and is usually formed in the range of 0.2 mm to 0.5 mm. .
- the dimples are preferably formed uniformly on the entire ball surface, assuming a triangular, pentagonal, or hexagonal polyhedron inscribed in the sphere, and the major axis of the dimple is positioned on each twill line of the sectioned surface.
- the triangular polyhedron is based on the regular icosahedron shown in FIG. 5 (a), and each triangle is divided into two upper and lower stages as shown in FIG. 6 (a).
- FIG. 6C a 180-hedron is formed when divided into three stages and divided into nine, and a 320-hedron is formed when divided into four stages and divided into 16 as shown in FIG.
- non-circular or elliptical dimples are formed along each ridgeline
- 120 dimples are formed in the 80-hedron, 270 in the 180-hedron, and 480 in the 320-hedron.
- the area occupied by the land portion in each face varies depending on the dimple short axis diameter Ds formed.
- the area occupied by the land surrounded by the dimple is adjusted to improve the lift force.
- the non-circular dimple may be formed along the ridgeline of each of the polyhedrons.
- a regular dodecahedron is used as a basis, and a triangle divided by a line segment from the apex of each pentagonal surface to the center of the surface in the developed view is formed (FIG. 7).
- a golf ball can be manufactured by forming non-circular dimples extending along the ridgelines of each triangle.
- the non-circular dimple is basically formed over the entire ridgeline, but as shown in FIG. 10, the dimple 2 is formed only at the center of the ridgeline, and the land is formed at the apex portion.
- a golf ball may be manufactured by forming a circular or polygonal dimple 4 at the apex of the polyhedron inscribed in the sphere in order to improve lift.
- a polygon polyhedron inscribed in a sphere is used as a reference, a ridge line connecting the vertices or an inscribed polyhedron obtained by further dividing each face by a triangle is assumed, and the ridge line connecting the vertices is surrounded by a pair of arcs.
- the main idea is to form a circular dimple and replace it with a conventional circular dimple.
- the area occupied by the land (spherical surface) of the non-circular dimple is small, and if the lift is insufficient, the remaining land is circular.
- the vortex formed at the peripheral edge tends to stay.
- the dimple on the ball surface is formed by a non-circular shape surrounded by a pair of arcs.
- the vortex is formed with a time difference so that it flows along the peripheral edge of the ellipse and does not stay. Therefore, even if the spin rate is increased as compared with the golf ball having a circular dimple, the flight distance is improved as a result of not increasing the drag.
- the air resistance that becomes the hook or slice of the ball is not increased, the straightness is excellent.
- FIG. 1 is a perspective view showing an entire golf ball according to a first embodiment of the present invention. It is a perspective view which shows 2nd Embodiment. It is a perspective view which shows 3rd Embodiment. It is a conceptual diagram of a situation (A) where a peeling boundary of a golf ball of circular dimples is formed and a situation (B) where a peeling boundary of a golf ball of circular dimples according to the present invention is formed. They are a three-dimensional view (a) and a development view (b) of an icosahedron. It is explanatory drawing which shows the aspect of 4 division (a), 9 division (b), and 16 division (c) of each triangle of the regular icosahedron of FIG.
- a three-dimensional view (a) and a development view (b) of a regular dodecahedron, and a development example of a regular pentagon is shown in the development view.
- It is explanatory drawing which shows the method of forming a dimple with a pair of circular arc when each surface of a polyhedron is a triangle. It is explanatory drawing in the case of arrange
- FIG. 1 shows a golf ball according to an embodiment of the present invention.
- 1 is a golf ball that forms a sphere, and a major axis that is 3.7 times longer than the minor axis (axis perpendicular to the ridgeline) along the twill line connecting the vertices of a triangular 180-hedron inscribed in the sphere
- An elliptical dimple 2 (axis parallel to the ridge line) is formed, and the dimple depth is 0.3 mm.
- FIG. 2 shows a golf ball 11 that forms a sphere, in which a major axis 1.9 times longer than the minor axis is formed along a twill line connecting the vertices of a triangular 180-hedron inscribed in the sphere, and a depth of 0.
- An elliptical dimple 12 having a diameter of 3 mm is formed.
- 11 is a schematic diagram of FIG. 2
- FIG. 12 is an enlarged sectional view taken along line AA of FIG.
- FIG. 13 is an enlarged sectional view taken along line BB of FIG.
- FIG. 3 shows a golf ball 21 having a spherical shape, an ellipse having a major axis of 4.0 times the minor axis along a twill line formed by a virtual imaginary 320 face, and a depth of 0.3 mm. Shaped dimples 22 are formed.
- the case of a sphere is taken as an example, but an elliptical dimple may be formed on each ridge line of a triangular, pentagonal or hexagonal polyhedron.
- the elliptical dimples are formed on the ridge lines of the triangular 180-hedron and 320-hedron inscribed in the sphere, but non-circular dimples can be formed on the ridge lines of the triangular 80-hedron. That is, in the present invention, the peripheral edge of the dimple is made oval or non-circular surrounded by a pair of arcs, turbulent flow is generated at the peripheral edge with a time difference, and the formed vortex is made to flow along the peripheral edge formed of the arc.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
Abstract
Description
2,12,22 楕円形ディンプル
Claims (7)
- 球体表面をランド部とし、そのランド部に複数のディンプルを形成してなるゴルフボールにおいて、
前記複数のディンプルの一部または全部が、ゴルフボールを形成する球体に内接する多面体の頂点を結ぶ稜線全体に渡ってその両側に沿って延びる一対の同一または異なる曲率を有する円弧を周縁とする非円形ディンプルであって、その非円形ディンプルの内接多面体の稜線に添う長軸が稜線に直交する短軸の1.2倍以上であることを特徴とする、周縁が円弧である非円形ディンプルゴルフボール。 - 前記ディンプルの外形が一対の同一曲率を有する円弧で形成された楕円形である請求項1記載のゴルフボール。
- 前記球体に内接する多面体が正三角形80乃至320面体であって、各稜線に添って延びる非円形ディンプルを120乃至480個形成してなる請求項1記載のゴルフボール。
- 前記球体に内接する多面体が正三角形80面体であって、稜線の両側に沿って延びる周縁を有する非円形ディンプル120個と非円形ディンプルに囲まれるランド部に少なくとも1個の円形または多角形ディンプルを形成してなる請求項1記載のゴルフボール。
- 前記球体に内接する多面体が5角形または6角形あるいは5角形及び6角形の組合せ多面体であって、各多角形面がその頂点からその面中心に至る線分で分割された三角形を形成し、各三角形の稜線に添って延びる非円形ディンプルを形成してなる請求項1記載のゴルフボール。
- 前記複数のディンプルの一部または全部が、ゴルフボールを形成する球体に内接する多面体の頂点を結ぶ稜線の中央部分に両側に沿って延びる一対の同一または異なる曲率を有する円弧を周縁とする非円形ディンプルであって、前記内接多角形の頂点を含むランド部に少なくとも1個の円形または多角形ディンプルを形成してなる請求項1記載のゴルフボール。
- 前記ディンプルの周縁がゴルフボールの飛行時に空気流を受けて縦渦が発生するエッジ角度及び深さを有する請求項1記載のゴルフボール。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010800255956A CN102458588A (zh) | 2009-06-09 | 2010-06-09 | 周围边缘为圆弧的非圆形凹面高尔夫球 |
JP2011518557A JP5715948B2 (ja) | 2009-06-09 | 2010-06-09 | 周縁が円弧である非円形ディンプルゴルフボール |
US13/376,982 US20120302377A1 (en) | 2009-06-09 | 2010-06-09 | Golf Ball with Non-Circular Dimples Having Circular Arc-Shaped Outer Peripheral Edges |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-138110 | 2009-06-09 | ||
JP2009138110 | 2009-06-09 |
Publications (1)
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WO2010143655A1 true WO2010143655A1 (ja) | 2010-12-16 |
Family
ID=43308910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2010/059762 WO2010143655A1 (ja) | 2009-06-09 | 2010-06-09 | 周縁が円弧である非円形ディンプルゴルフボール |
Country Status (5)
Country | Link |
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US (1) | US20120302377A1 (ja) |
JP (2) | JP3157248U (ja) |
KR (1) | KR101550792B1 (ja) |
CN (1) | CN102458588A (ja) |
WO (1) | WO2010143655A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013138788A (ja) * | 2012-01-05 | 2013-07-18 | Sunao Umemura | ディンプル底部が隆起したゴルフボール |
WO2013111263A1 (ja) | 2012-01-23 | 2013-08-01 | Kishishita Yoshihiro | ゴルフボール |
JPWO2013111263A1 (ja) * | 2012-01-23 | 2015-05-11 | 佳弘 岸下 | ゴルフボール |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3157248U (ja) * | 2009-06-09 | 2010-02-04 | 友彦 佐藤 | 楕円形ディンプルゴルフボール |
JP5988418B2 (ja) * | 2010-12-15 | 2016-09-07 | 株式会社Hanabi | 非円形ディンプルゴルフボール |
US20150300434A1 (en) * | 2014-04-18 | 2015-10-22 | GM Global Technology Operations LLC | Airflow deflector for brake cooling |
US9776044B2 (en) | 2015-03-19 | 2017-10-03 | Volvik, Inc. | Golf ball having comma-shaped dimples |
KR101550402B1 (ko) | 2015-03-19 | 2015-09-08 | 주식회사 볼빅 | 콤마 형상 딤플을 구비한 골프공 |
KR101558488B1 (ko) | 2015-04-14 | 2015-10-07 | 주식회사 볼빅 | 불연속 환상 딤플을 구비한 골프공 |
KR101567595B1 (ko) | 2015-04-30 | 2015-11-10 | 주식회사 볼빅 | 삼각 요면 섹터들에 의해 분할된 표면을 갖는 골프공 |
US9873019B2 (en) | 2015-04-30 | 2018-01-23 | Volvik Inc. | Golf ball having surface divided by triangular concave sectors |
USD831135S1 (en) * | 2015-12-31 | 2018-10-16 | Eye On Ball, Inc. | Sports ball |
US10549159B2 (en) * | 2017-03-14 | 2020-02-04 | Wilson Sporting Goods Co. | Tennis ball having a core with aerodynamic patterns |
KR101938854B1 (ko) | 2018-08-13 | 2019-01-15 | 주식회사 볼빅 | 골프공 |
CA202044S (en) * | 2020-06-09 | 2022-04-11 | Bownce Holding Plc | Ball for sports |
KR102245207B1 (ko) * | 2020-06-30 | 2021-04-28 | 주식회사 볼빅 | 조합 딤플들이 형성된 구면을 갖는 골프공 |
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-
2010
- 2010-06-09 US US13/376,982 patent/US20120302377A1/en not_active Abandoned
- 2010-06-09 CN CN2010800255956A patent/CN102458588A/zh active Pending
- 2010-06-09 JP JP2011518557A patent/JP5715948B2/ja not_active Expired - Fee Related
- 2010-06-09 KR KR1020127000048A patent/KR101550792B1/ko active IP Right Grant
- 2010-06-09 WO PCT/JP2010/059762 patent/WO2010143655A1/ja active Application Filing
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JPWO2013111263A1 (ja) * | 2012-01-23 | 2015-05-11 | 佳弘 岸下 | ゴルフボール |
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Also Published As
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CN102458588A (zh) | 2012-05-16 |
JP5715948B2 (ja) | 2015-05-13 |
JP3157248U (ja) | 2010-02-04 |
KR101550792B1 (ko) | 2015-09-07 |
JPWO2010143655A1 (ja) | 2012-11-29 |
US20120302377A1 (en) | 2012-11-29 |
KR20120043728A (ko) | 2012-05-04 |
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