A golf ball

Abstract

The application discloses a golf ball, which comprises two hemispheres, each of which comprises a plurality of layers of concentric spherical segments arranged in sequence along the connecting end of the two hemispheres in a direction away from the connecting end, and a plurality of recess structures arranged in sequence and at intervals on the outer surface of each layer of concentric spherical segments, wherein the total area of the recess structures on the golf ball is not less than 80% of the total area of the outer surface of the golf ball, so as to uniformly distribute the airflow on the outer surface of the golf ball. By increasing the number of recess structures, the density of the turbulence structure on the surface of the golf ball is higher, the airflow on the surface of the golf ball is more complex, more local vortexes and turbulent flows are formed, the low-pressure area of the leeward surface of the golf ball in the flying process can be effectively destroyed, the pressure difference resistance can be reduced, the turbulence effect is stronger, the golf ball has a larger turbulence area and a more stable air laminar adhesion, and thus the drag resistance is reduced and the flying distance is increased.

Description

Technical Field

[0001] This application relates to the field of sports equipment technology, and in particular to a golf ball. Background Technology

[0002] With the improvement of living standards, golf has become increasingly popular. Its flight performance is influenced by multiple factors, including the golfer's control of the shot speed and angle, as well as the ball's weight, structure, size, and aerodynamic characteristics. During the flight of a golf ball, the main airflow effect manifests as pressure drag, which is the pressure difference between the low-pressure area on the leeward side of the ball and the high-pressure area on the windward side, thus hindering the ball's forward movement. Therefore, reducing pressure drag has become a key requirement for improving golf ball performance. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a golf ball comprising two hemispheres, each hemisphere comprising multiple concentric segments arranged sequentially along the connection end of the two hemispheres in a direction away from the connection end. Each layer of concentric segments has multiple recessed structures arranged at intervals on its outer surface. The total area of ​​the recessed structures on the golf ball is not less than 80% of the total area of ​​the outer surface of the golf ball, so as to achieve a uniform airflow distribution on the outer surface of the golf ball.

[0004] Preferably, the center of mass of the golf ball coincides with the center of the golf ball.

[0005] Preferably, the recessed structures have the same recessed depth;

[0006] Alternatively, adjacent recessed structures may have different recess depths, and these recessed structures with different depths may be alternately arranged to form an interleaved turbulence structure.

[0007] Preferably, the ratio of the recess depth of the recessed structure to the outer diameter of the golf ball is in the range of 5.94% to 11.91%.

[0008] Preferably, the circumferential offset angles of the recessed structures on adjacent concentric spherical segments are different.

[0009] Preferably, the angle between the center of the concave structure of adjacent concentric segments and the center of the golf ball is different.

[0010] Preferably, the angle between the center of the concave structure on the concentric ball segment at the connecting end and the center of the golf ball is α, and the angle between the center of the concave structure on the adjacent concave ball segment and the center of the golf ball is β, wherein the angle α is smaller than the angle β.

[0011] Preferably, the concentric spherical segment away from the connecting end includes alternating first and second recessed structures, wherein the diameter of the first recessed structure is larger than the diameter of the second recessed structure.

[0012] Preferably, the center of the golf ball forms a rotation axis to the end furthest from the connecting end, wherein one of the hemispheres is formed by mirroring the other hemisphere and rotating it around the rotation axis by a predetermined angle.

[0013] Preferably, the number of recessed structures in the concentric spherical segments decreases in the direction away from the connecting end;

[0014] And / or, the concave structures of adjacent concentric spherical segments have different heights.

[0015] Based on the above technical solution, the golf ball described in this application has the following beneficial effects:

[0016] By increasing the number of indentations, the density of the turbulence structures on the surface of the golf ball is increased. This increased density makes the airflow on the ball's surface more complex, creating more local eddies and turbulence. This effectively disrupts the low-pressure area on the leeward side of the golf ball during flight, reducing pressure drag and enhancing the turbulence effect. Furthermore, it allows the golf ball to have a larger turbulence area and more stable laminar air adhesion, thereby reducing drag and increasing flight distance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a front view of the golf ball provided in the embodiments of this application.

[0019] Figure 2 This is a top view of a golf ball provided in an embodiment of this application.

[0020] Figure 3 This is a perspective view of a golf ball provided in an embodiment of this application.

[0021] Figure 4 This is a rear view of a golf ball provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of the internal cross-section of the upper hemisphere of a golf ball provided in an embodiment of this application.

[0023] Figure 6This is a perspective view of the upper hemisphere of a golf ball provided in an embodiment of this application.

[0024] Figure 7 This is a schematic diagram of the recessed structure in the concentric spherical segment of layer L1 provided in the embodiments of this application.

[0025] Figure 8 This is a schematic diagram of the recessed structure in the concentric spherical segment of the L2 layer provided in the embodiment of this application.

[0026] Figure 9 This is a schematic diagram of the recessed structure in the concentric spherical segment of layer L3 provided in the embodiments of this application.

[0027] Figure 10 This is a schematic diagram of the recessed structure in the concentric spherical segment of layer L4 provided in the embodiments of this application.

[0028] Figure 11 This is a schematic diagram of the recessed structure in the concentric spherical segment of layer L5 provided in the embodiment of this application.

[0029] Figure 12 This is a schematic diagram of the recessed structure in the concentric spherical segment of the L6 layer provided in the embodiment of this application.

[0030] Figure 13 This is a schematic diagram of the concave structure in the L7-1 layer concentric spherical segment provided in the embodiment of this application.

[0031] Figure 14 This is a schematic diagram of the recessed structure in the concentric spherical segment of layer L7-2 provided in the embodiment of this application.

[0032] Figure 15 This is a schematic diagram of the recessed structure in the concentric spherical segment of the L8 layer provided in the embodiment of this application.

[0033] Figure 16 This is a schematic diagram of the recessed structure in the concentric spherical segment of the L9 layer provided in the embodiment of this application.

[0034] The following are the annotations for the attached figures: 100, golf ball; 11, upper hemisphere; 12, lower hemisphere; 13, concentric segment; 131, connecting end; 14, recessed structure; 15, axis of rotation. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0037] like Figures 1-16 As shown in the figure, this application discloses a golf ball 100, which includes two hemispheres. Each hemisphere includes multiple concentric segments 13. The multiple concentric segments 13 are arranged sequentially along the connection end 131 of the two hemispheres in a direction away from the connection end 131. On the outer surface of each layer of concentric segments 13, there are multiple recessed structures 14 arranged sequentially at intervals. The total area of ​​the recessed structures 14 on the golf ball 100 is not less than 80% of the total area of ​​the outer surface of the golf ball 100, so as to uniformly distribute the airflow on the outer surface of the golf ball 100.

[0038] Understandably, the golf ball 100 is divided into two hemispheres, each of which is composed of multiple concentric segments 13 arranged sequentially along the hemisphere connection end 131 (i.e., the center of the ball) in a direction away from the connection end 131.

[0039] like Figures 1-6 As shown, taking the upper hemisphere 11 as an example, the structure of each hemisphere will be described in detail: from the connection end 131 of the two hemispheres, it is divided into several planes in a direction away from the connection end 131, which are the concentric spherical segments 13 of each layer: L1, L2, L3, L4, L5, L6, L7-1, L7-2, L8 and L9. Among them, L7-1 and L7-2 belong to the L7 layer and represent recessed structures 14 of different sizes.

[0040] The number of recessed structures 14 on each layer of concentric spherical segment 13 is not equal. In this embodiment, the number of recessed structures 14 on each layer of concentric spherical segment 13 is defined as N. Then the corresponding number of recessed structures 14 on L1, L2, L3, L4, L5, L6, L7-1, L7-2, L8 and L9 are as follows: N1=32, N2=32, N3=32, N4=24, N5=24, N6=20, N7-1=6, N7-2=6, N8=6, N9=1. It can be seen that the number of recessed structures 14 on the concentric spherical segment 13 decreases in the direction away from the connecting end 131.

[0041] It is understandable that the connection end 131 of the upper hemisphere 11 and the lower hemisphere 12 is the xy axis plane, and the rotation axis 15, i.e. the z axis, is formed from the center of the sphere to the end away from the connection end 131. The L9 layer has only one recessed structure 14, that is, the recessed structure 14 of the L9 layer is located at the extreme point of the rotation axis 15.

[0042] Therefore, in this embodiment of the application, the total number of recessed structures 14 on the outer surface of the upper hemisphere 11 and the lower hemisphere 12 is 366, so the total area of ​​the recessed structures 14 on the outer surface of the golf ball 100 is not less than 80% of the total area of ​​the outer surface of the golf ball 100.

[0043] Therefore, compared to the 300-336 dimples commonly found on traditional golf balls, this embodiment employs 366 dimple structures 14, increasing the area ratio of the dimple structures to 80%. This increased number of dimple structures 14 results in a higher density of turbulence structures on the surface of the golf ball 100. This increased density makes the airflow on the surface of the golf ball 100 more complex, forming more local eddies and turbulence. This effectively disrupts the low-pressure area on the leeward side of the golf ball during flight, reducing pressure drag and enhancing its turbulence effect. Furthermore, the increased coverage of the total surface area of ​​the dimple structures 14 to 80% gives the golf ball a larger turbulence area and more stable laminar airflow adhesion, thereby reducing drag and increasing flight distance.

[0044] In this embodiment, the recessed structures 14 are not simply evenly distributed, but rather form an asymmetrical arrangement.

[0045] The asymmetrical concave structure 14 breaks the symmetry of the sphere's surface, creating complex turbulence in the airflow. This turbulence effectively disrupts the pressure difference between the leeward and windward sides of the golf ball 100, reducing pressure drag and thus increasing its flight distance. Secondly, the asymmetrical turbulence also makes the airflow distribution on the golf ball 100 surface more uniform, improving its flight stability. Simultaneously, the asymmetrical turbulence structure allows for better control of the golf ball's spin, making it more controllable at high speeds, easier to control its flight direction and landing point, and improving the golfer's hitting accuracy.

[0046] Therefore, through the asymmetrical arrangement of the multi-layered concentric ball segments 13 and the recessed structure 14, the technical effects of reducing pressure drag, improving flight stability, and enhancing controllability are achieved, significantly improving the flight performance of the golf ball 100 and bringing a better hitting experience to the golfer. The asymmetrical arrangement of the recessed structure 14 will be described in detail below:

[0047] like Figures 7-16 As shown in the embodiments of this application, the recessed structures 14 have the same recess depth, and the recess depth h of the recessed structure 14 is in the range of 0.254mm-0.508mm, preferably 0.2794mm.

[0048] Understandably, the depth of the recessed structure 14 affects the intensity and range of the turbulence. Specifically, the greater the depth, the stronger the turbulence, but an excessively deep recess may reduce the surface strength of the golf ball 100 and affect its service life. The smaller the depth, the weaker the turbulence, but an excessively shallow recess may not effectively reduce pressure drag.

[0049] Therefore, the recess depth design of the recessed structure 14 can ensure the turbulence effect while taking into account the surface strength and service life of the golf ball 100.

[0050] In possible embodiments, it can also be designed as a mixed distribution of multiple specifications, for example: the recessed structures 14 adjacent to each other have different recessed depths, and the recessed structures 14 with different recessed depths are alternately arranged to form an interleaved turbulence structure.

[0051] It is understood that the recessed structures 14 with different depths alternate, i.e., they are arranged in a staggered pattern. Specifically, the recessed depths include a first depth and a second depth, with the recessed structures 14 of the first depth and the recessed structures 14 of the second depth arranged adjacent to each other. In other embodiments, a third and a fourth depth may also be included, with the four recessed structures 14 of different depths arranged alternately in sequence.

[0052] Understandably, the lift of a golf ball 100 primarily originates from its spin (Magnus effect), which drives the flow of surrounding air, creating a pressure difference. However, when the airflow moves across the ball's surface, especially in the leeward region, it is prone to separation, forming a low-pressure area that consumes some lift and increases drag. Therefore, the recessed structure 14 of the staggered turbulence structure can more effectively and non-uniformly delay airflow separation on the ball's surface. Shallower recessed structures 14 may generate weaker disturbances at specific angles, while deeper recessed structures 14 generate stronger disturbances. This alternating disturbance creates a more complex and less easily separated flow pattern on the ball's surface. Especially when the ball is spinning, the staggered turbulence can more effectively transfer energy to the leeward region, reducing its size and intensity, thereby reducing drag while maintaining or enhancing lift. Furthermore, the recessed structure 14 of the staggered turbulence structure breaks the symmetry of the ball's surface, creating a more complex and "chaotic" turbulence field. When crosswinds arrive, this complex turbulent field makes the interaction between the wind and the surface of the sphere more irregular. Crosswinds may generate disturbance forces of different magnitudes and directions on the recessed structures 14 at different depths. These forces interfere with and cancel each other out, making the lateral force on the sphere as a whole smaller, or the force change more gradual, and less likely to produce a sharp deflection. This can better balance the various small disturbance torques generated during the rotation process and suppress the swaying or tilting of the rotation axis 15.

[0053] In a preferred embodiment, the depth of the recessed structure 14 is in the range of 5.94% to 11.91% of the outer diameter of the golf ball 100.

[0054] In the embodiments of this application, the recessed depth of the recessed structure 14, as described above, is between 0.254 mm and 0.508 mm. The outer diameter of the golf ball 100 in this application is between 42.67 mm and 42.78 mm, preferably 42.67 mm. This design ensures that the recessed structure 14 has sufficient influence on the airflow while avoiding potential negative effects caused by being too deep or too shallow. This ratio range ensures that the depth of the recessed structure 14 is large enough to effectively optimize aerodynamic performance, such as reducing drag, increasing lift, and enhancing stability, but it is not so large as to damage the structure of the golf ball 100 or generate unfavorable turbulence.

[0055] like Figure 4As shown, the circumferential offset angles of each layer L1, L2, L3, L4, L5, L6, L7-1, L7-2, L8, and L9 relative to the xy-axis plane are defined as c1, c2, c3, c4, c5, c6, c7, c8, and c9, respectively. These circumferential offset angles can be understood as the angle between the center of the initial concave structure 14 in each layer of concentric spherical segments 13 and the y-axis on the xy-axis horizontal plane. The specific circumferential offset angles are designed as follows: c1=0°, c2=5.625°, c3=0°, c4=7.5°, c5=0°, c6=0°, c7-1=0°, c7-2=30°, c8=30°, and c9=0°.

[0056] Therefore, it can be seen that the circumferential offset angles of the recessed structures 14 on adjacent concentric spherical segments 13 are different, for example, L1 and L2, L2 and L3, L3 and L4, L4 and L5, L7-1 and L8, and L8 and L9; and the circumferential offset angles of the recessed structures 14 on the same concentric spherical segment 13 are also different, for example, L7-1 and L7-2.

[0057] This design breaks away from the relatively uniform and predictable turbulence produced by traditional equidistant ring arrangements. The different circumferential offset angles between layers make the overall distribution of the recessed structures 14 on the spherical surface more complex and irregular. When the airflow passes over the sphere, it encounters a more varied and non-uniform surface, which triggers more complex and refined airflow disturbance patterns, including more diverse vortex generation, separation, and interaction. Therefore, by offsetting between layers, the separation point of the airflow on the sphere's surface can be controlled more effectively. The synergistic effect of the recessed structures 14 at different layers and angles can more uniformly "delay" airflow separation, reducing the range and intensity of the low-pressure zone at the rear of the sphere.

[0058] like Figure 4 As shown, the angle between the center of the recessed structure 14 in layer L1 and the center of the golf ball 100 is α=5°. The angle between the center of the recessed structure 14 on the adjacent concentric segments 13 of the remaining layers and the center of the golf ball 100 is β. Then, the angles between the adjacent layers L2, L3, L4, L5, L6, L7-1, L7-2, L8 and L9 and the center of the ball are defined as β2, β3, β4, β5, β6, β7-1, β7-2, β8 and β9, respectively, where β2=10°, β3=9°, β4=11°, β5=11°, β6=10°, β7-1=12°, β7-2=10°, β8=10°, β8=12°, and β9=12°.

[0059] It is evident that the angles between the centers of the concave structures 14 in adjacent concentric segments 13 and the center of the golf ball 100 are different, and that the angle α is smaller than the angle β. This arrangement results in a different degree of "lifting" of each layer relative to the next, leading to a more irregular and complex distribution of the concave structures 14 across the entire sphere, further disrupting the symmetry and predictability of the sphere's surface. The non-uniform interlayer angles cause variations in the density and pattern of the concave structures 14 along the z-axis on the sphere's surface, making the airflow disturbances on the sphere's surface more three-dimensional and complex. As the airflow bypasses the concave structures 14 at different angles and heights, it generates richer and more refined vortex and turbulence structures.

[0060] Furthermore, the concentric spherical segment 13 of the L7 layer, which is away from the connection end 131, includes alternating first recessed structures 14 and second recessed structures 14. That is, the first recessed structures 14 with the same structure form the L7-1 layer, and the second recessed structures 14 with the same structure form the L7-2 layer. The diameter of the first recessed structure 14 is larger than the diameter of the second recessed structure 14.

[0061] Understandably, the concave structures 14 of different diameters interact with the airflow in different ways. Specifically, the larger first concave structure 14 generates stronger local eddies and turbulence, while the smaller second concave structure 14 generates relatively weaker or different-characteristic disturbances. Designing concave structures 14 with different structural forms within the same concentric spherical segment 13, with alternating arrangements and placement near the hemisphere's poles, causes the intensity and characteristics of the disturbance on the spherical surface at this layer to change rapidly in space, forming a highly non-uniform and complex disturbance field. This complexity breaks the regular symmetry, making the airflow on the spherical surface more unpredictable, but potentially more effective in achieving the design objectives. Furthermore, the combination of concave structures 14 of alternating sizes can create a "strong-weak-strong-weak" disturbance pattern on the spherical surface. This pattern, compared to the uniform disturbance of a single-sized concave structure 14, can more effectively delay or alter the separation behavior of the airflow at the rear of the sphere. By optimizing this pattern, the low-pressure area at the rear of the sphere can be reduced more effectively, thereby reducing pressure drag and, to some extent, increasing the lift generated by rotation. Meanwhile, as the sphere rotates, the concave structures 14 of different diameters cut the airflow at different relative speeds, generating different aerodynamic forces. The alternating arrangement of concave structures 14 of different sizes makes the distribution of aerodynamic forces acting on the surface of the sphere more complex, which can also suppress minor wobbling or tilting of the rotation axis 15 to a certain extent, reducing trajectory jitter caused by rotational instability.

[0062] In a preferred embodiment, the lower hemisphere 12 is formed by mirroring the upper hemisphere 11 and rotating it around the rotation axis 15 by a preset angle, wherein the preset angle is c2 = 5.625°.

[0063] It is understandable that the upper hemisphere 11 and the lower hemisphere 12 are not simply mirror images of each other. Instead, after mirroring, the lower hemisphere 12 is rotated around the rotation axis 15 of the sphere by a specific angle, namely 5.625°. Specifically, after the upper hemisphere 11 and the lower hemisphere 12 are aligned along the equator, there is an angular deviation of 5.625°.

[0064] Understandably, when a perfectly symmetrical sphere rotates, the airflow disturbance pattern on its surface is also symmetrical. Therefore, by rotating the lower hemisphere 12 by 5.625 degrees, the concave structure 14 patterns of the upper and lower hemispheres 12 no longer strictly correspond, making the overall airflow disturbance pattern on the sphere's surface more complex and irregular. When airflow passes through the upper hemisphere 11 and lower hemisphere 12, it encounters not entirely identical arrangements of the concave structures 14, resulting in differences in the generated vortices, turbulence, and airflow separation points / times on the different hemispheres. This asymmetry increases the complexity of the interaction between air and the sphere's surface, making the airflow field around the sphere no longer a simple, predictable symmetrical pattern, but filled with more tiny, random disturbances. This increased complexity allows for more effective airflow control, reducing adverse pressure drag and optimizing flight paths.

[0065] like Figures 7-14 As shown, the heights of each layer L1, L2, L3, L4, L5, L6, L7-1, L7-2, L8, and L9 relative to the xy-axis plane are defined as a1, a2, a3, a4, a5, a6, a7-1, a7-2, a8, and a9, respectively. The heights of the recessed structures 14 within the concentric spherical segments 13 of each layer are designed as follows: a1 = 4.1 mm, a2 = 4 mm, a3 = 3.7 mm, a4 = 4.4 mm, a5 = 3.8 mm, a6 = 3.6 mm, a7-1 = 5 mm, a7-2 = 3.5 mm, a8 = 4.4 mm, and a9 = 4.4 mm.

[0066] It can be seen that the heights of the recessed structures 14 of adjacent concentric spherical segments 13 are different, and the height refers to the length of the recessed structure 14 along the z-axis.

[0067] In this embodiment of the application, the design based on the asymmetric arrangement structure makes the centroid of the golf ball 100 coincide with the center of the golf ball 100.

[0068] Understandably, when an object's center of mass coincides with its geometric center (center of rotation), it possesses ideal rotational symmetry. That is, when this object rotates about any axis passing through its center, it does not generate additional torque due to uneven internal mass distribution. Therefore, when a golf ball 100 is struck and begins to spin, it will rotate stably about an axis passing through its center, without spontaneous, random wobbling or tilting due to minor unevenness in its internal mass distribution, laying the foundation for stable and predictable rotation. Thus, by aligning the center of mass with the center of rotation, this inherent source of wobbling is eliminated, making the ball's flight path in the air straighter and more stable, reducing unexpected deviations caused by the ball's own rotational instability.

[0069] The foregoing description has fully disclosed the specific embodiments of this application. It should be noted that any modifications made by those skilled in the art to the specific embodiments of this application do not depart from the scope of the claims. Accordingly, the scope of the claims of this application is not limited to the foregoing specific embodiments.

Claims

1. A golf ball, characterized in that, It includes two hemispheres, each of which includes multiple concentric segments. The multiple concentric segments are arranged sequentially along the connection end of the two hemispheres in a direction away from the connection end. Each layer of concentric segments has multiple recessed structures arranged in sequence on its outer surface. The total area of ​​the recessed structures on the golf ball is not less than 80% of the total area of ​​the outer surface of the golf ball, so as to uniformly distribute the airflow on the outer surface of the golf ball.

2. The golf ball according to claim 1, characterized in that, The center of mass of the golf ball coincides with the center of the golf ball.

3. The golf ball according to claim 1, characterized in that, The recessed structures described herein have the same recessed depth; Alternatively, adjacent recessed structures may have different recess depths, and these recessed structures with different depths may be alternately arranged to form an interleaved turbulence structure.

4. The golf ball according to claim 1, characterized in that, The depth of the recessed structure relative to the outer diameter of the golf ball is in the range of 5.94% to 11.91%.

5. The golf ball according to claim 1, characterized in that, The circumferential offset angles of the recessed structures on adjacent concentric spherical segments are different.

6. The golf ball according to claim 1, characterized in that, The angle between the center of the concave structure of adjacent concentric segments and the center of the golf ball is different.

7. The golf ball according to claim 1, characterized in that, The angle between the center of the concave structure on the concentric segment at the connecting end and the center of the golf ball is α, and the angle between the center of the concave structure on the adjacent concave segment and the center of the golf ball is β, wherein the angle α is smaller than the angle β.

8. The golf ball according to claim 1, characterized in that, The concentric spherical segment away from the connecting end includes alternating first and second recessed structures, wherein the diameter of the first recessed structure is larger than the diameter of the second recessed structure.

9. The golf ball according to claim 1, characterized in that, The center of the golf ball forms a rotation axis to the end furthest from the connection end, wherein one of the hemispheres is formed by mirroring the other hemisphere and rotating it around the rotation axis by a preset angle.

10. The golf ball according to claim 1, characterized in that, The number of concave structures in the concentric spherical segments decreases in the direction away from the connecting end; And / or, the concave structures of adjacent concentric spherical segments have different heights.

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