billiard cue tip

Abstract

This billiard cue tip reduces the degree of "jump" and "curve" that occur when striking the cue ball with a billiard cue, improving the straightness of the cue ball's trajectory, and allows for continuous control of the jump and curve with very small changes. [Solution] The billiard tip, which is provided at the end of a billiard cue, has a columnar or frustoconical shape with an upper surface, a lower surface, and a side surface, the diameter of the lower surface is 6 mm to 16 mm, the tip height is 4 mm to 10 mm, the upper surface has holes to reduce the degree of deflection and curve that occurs when the cue ball is struck with the cue, the holes are a plurality of vertical holes formed perpendicularly from the upper surface to the lower surface, and the diameter of each vertical hole is 0.1 mm to 1.5 mm.

Description

Technical Field

[0001] The present invention relates to a billiards tip attached to the tip of a billiards cue.

Background Art

[0002] Billiards is one of the indoor sports loved by people all over the world. As a representative game, on a billiards table covered with baize, a billiards cue (hereinafter sometimes simply referred to as a "cue") with a cylindrical member called a billiards tip (hereinafter sometimes simply referred to as a "tip") with a thickness of about 5 to 9 mm and a height of about 9 to 14 mm attached to the tip is used to hit the object ball by hitting the cue ball (shooting), making the object ball travel in the intended direction and dropping it into the pocket of the billiards table. As such billiards tips, those formed from materials such as pigskin, cowhide, or synthetic resin in a single layer, those formed by multi-layer molding, those impregnated with resin, etc. are commercially available (Non-Patent Document 1; "Nuburo (Blog of Billiards Equipment)").

[0003] By the way, when a beginner in billiards hits the cue ball with a billiards cue, it is important that the cue ball hits the object ball while rotating clockwise along a straight line connecting the center of the cue ball and the center of the object ball. This means that it is required that the billiards tip can impart straightness to the cue ball so that the hit cue ball travels straight in a clockwise rotation.

[0004] On the other hand, not only billiard beginners but even professional players sometimes miss the center of the cue ball with their cue, to varying degrees. For example, if the cue ball is struck on the right side, a phenomenon called "jump" occurs, where the cue ball spins counterclockwise and veers off to the left. Furthermore, the cue ball, having veered off course in this way, will curve due to friction with the billiard table's cloth, resulting in a phenomenon called "curve." These "jump" and "curve" phenomena are caused by the fact that the accuracy of a billiard player's cue ball strike is not uniform; in other words, deviations occur from the intended direction and force of the strike.

[0005] In addition to the accuracy of the billiard player's shot, it is known that factors such as the material and inclination of the billiard table, the material of the cloth and changes in the coefficient of surface friction over time, the material of the cue ball, the deformation of the cue ball from a perfect sphere over time due to wear, the material and curvature of the cue, changes in the shape of the tip over time, and changes in the hardness of the tip over time can also affect the "jump" and "curve" of the shot.

[0006] Furthermore, for intermediate and advanced billiard players, spin control techniques are necessary, which involve considering the placement of the cue ball and object balls and intentionally imposing a clockwise or counterclockwise rotation on the cue ball by striking it with the cue (so-called "spin shot"), in order to produce the desired deflection and curve. In this case, if the degree of deflection and curve when striking the cue ball with a constant force is too great, even slight differences in the shot will cause a large change in deflection and curve, reducing the accuracy of the shot. For this reason, in order to improve the controllability of the degree of deflection and curve, and consequently improve the accuracy of the shot, a tip has been proposed in which a hole is drilled in the center of the top surface of the tip and filled with a different material, thereby creating differences in hardness, elasticity, and slipperiness between the central part and the surrounding peripheral part (Patent Document 1). [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2022-161826 [Non-patent literature]

[0008] [Non-Patent Document 1] "NuBlo (Billiards Equipment Blog)"<URL:https: / / nu-blo.com / billiard-tip / #a2> [Overview of the project] [Problems that the invention aims to solve]

[0009] However, the tip proposed in Patent Document 1 requires a physical change in the material of the tip between the central and peripheral parts. As a result, the material is discontinuous at the boundary between the central and peripheral parts, making it unavoidable to strike the cue ball at the tip boundary. This also leads to discontinuities in the control of the cue's trajectory and curve, making it difficult to control the trajectory and curve continuously with very small changes. Furthermore, the criteria for physically changing the material of the tip between the central and peripheral parts depend on the preferences and sensations of each player, making it difficult for players to obtain a tip that matches their preferences and sensations.

[0010] The object of the present invention is to provide a billiard cue tip that can reduce the degree of "jump" and "curve" that occur when the cue ball is struck with a billiard cue, improve the straightness of the cue ball's trajectory, and moreover, allow for continuous control of the jump and curve with very small changes. [Means for solving the problem]

[0011] The inventors of the present invention hypothesized that the degree of dive and curve of the cue ball when struck with a billiard cue, and the straightness of the cue ball's trajectory, could be reduced by allowing the force applied to the periphery of the tip's upper surface to escape inward. They discovered that this could be achieved by making changes such as forming holes in the tip to reduce the mass of that part, and further discovered that changes to the number of holes, hole diameter, and hole pattern could be easily made using commercially available equipment such as a general-purpose drill, thus completing the present invention.

[0012] In other words, the present invention provides a billiard tip to be provided at the tip of a billiard cue, wherein the billiard tip has a columnar or frustoconical shape having an upper surface, a lower surface and a side surface, and has a hole on the upper surface or side surface for reducing the degree of deflection and curve that occurs when the cue ball is struck with the cue.

[0013] Furthermore, the present invention also provides a billiard cue in which a shaft is connected to a butt, and the above-described billiard tip of the present invention is attached to the tip of the shaft. [Effects of the Invention]

[0014] The billiard tip of the present invention has a columnar or frustoconical shape with an upper surface, a lower surface, and a side surface, and has a hole on its upper surface or side surface that can reduce the degree of deflection and curve that occurs when the cue ball is struck with the cue. Therefore, when the cue ball is struck with a billiard cue fitted with the billiard tip of the present invention (for example, when a spin shot is made), the degree of deflection and curve that occurs is reduced compared to when the cue ball is struck under similar conditions (direction of strike, force of strike) with a billiard cue fitted with the same tip, except that the hole is not formed. In other words, the straightness of the cue ball's trajectory is improved.

[0015] In addition, forming such holes in the tip can be performed using commercially available devices such as general drill presses, and furthermore, it is possible to easily change the hole position, hole depth, hole diameter, number of holes, hole pattern, etc. Therefore, it becomes possible to continuously control the jump and curve with a very small amount of change.

Brief Description of the Drawings

[0016] [Figure 1] Figure 1 is an overall view of a billiards cue equipped with the billiards tip of the present invention. [Figure 2A] Figure 2A is a perspective view of the cylindrical billiards tip of the present invention. [Figure 2B] Figure 2B is a perspective view of the frustum-shaped billiards tip of the present invention. [Figure 3A] Figure 3A is a schematic side view of the cylindrical billiards tip of the present invention. [Figure 3B] Figure 3B is a schematic side view of the cylindrical billiards tip of the present invention, whose upper surface is a convex curved surface. [Figure 3C] Figure 3C is a schematic side view of the cylindrical billiards tip of the present invention, whose upper surface is an uneven surface. [Figure 4] Figure 4 is an explanatory diagram of the jump and curve that occur when hitting a cue ball with a billiards cue. [Figure 5] Figure 5 is a cross-sectional view of a billiards tip having a vertical hole. [Figure 6] Figure 6 is a cross-sectional view of a billiards tip of another embodiment having a vertical hole. [Figure 7] Figure 7 is a top view of the billiards tip of Figure 6. [Figure 8A] Figure 8A is a top perspective view of the billiards tip of the present invention having a groove-shaped horizontal hole. [Figure 8B] Figure 8B is a side perspective view of the billiards tip of the present invention of Figure 8A as viewed from the C direction. [Figure 9A]Figure 9A is a top perspective view of a billiards tap according to another aspect of the present invention having radial lateral holes. [Figure 9B] Figure 9B is a side perspective view of the billiards tap of the present invention in FIG. 9A as viewed from the C direction. [Figure 10A] Figure 10A is a top perspective view of a billiards tap according to another aspect of the present invention having lattice-shaped lateral holes, and is also a top perspective view of the billiards tap of Example 2. [Figure 10B] Figure 10B is a side perspective view of the billiards tap of the present invention in FIG. 10A as viewed from the C direction. [Figure 11A] Figure 11A is a top perspective view of a billiards tap of the present invention having inclined holes. [Figure 11B] Figure 11B is a side perspective view of the billiards tap of the present invention in FIG. 11A as viewed from the C direction. [Figure 12A] Figure 12A is a top perspective view of a billiards tap according to another aspect of the present invention having inclined holes. [Figure 12B] Figure 12B is a side perspective view of the billiards tap of the present invention in FIG. 12A as viewed from the C direction. [Figure 13] Figure 13 is a top view of the billiards tap of Example 1. [Figure 14] Figure 14 is a top perspective view of the billiards tap of Example 3. [Figure 15] Figure 15 is a top perspective view of the billiards tap of Example 4.

Mode for Carrying Out the Invention

[0017] Hereinafter, the billiards tap of the present invention will be described in detail with reference to the drawings. In each figure, the same reference numerals represent the same or equivalent components.

[0018] <Overall Configuration of Billiards Tap> As shown in Figure 1, the billiard tip 10 of the present invention is provided at the tip of the shaft 22 of a billiard cue 200, which is connected to a butt 20 by a shaft 22 having a protective material (so-called ferrule) 21 attached to it. Similar to conventional billiard tips, it is made of a single layer molded from a material such as pigskin, cowhide, or synthetic resin, or it is made by molding multiple layers or impregnating it with resin. As shown in Figure 2A, the billiard tip 10 of the present invention has a columnar shape, represented by a cylindrical shape having an upper surface 10a, a lower surface 10b, and a side surface 10c, or a frustoconical shape, represented by a truncated cone shape, as shown in Figure 2B. Here, the upper surface 10a of the tip is the surface that directly contacts the cue ball, the lower surface 10b is the surface that is attached to the tip of the billiard cue (ferrule or a seat attached to its surface), and the side surface 10c is the surface that separates the upper surface 10a and the lower surface 10b. The billiard tip 10 of the present invention is characterized by having a hole 1 on its top surface 10a or side surface 10c for reducing the degree of deflection and curve that occurs when the cue ball is struck with the cue (in other words, a hole capable of reducing the degree of deflection and curve). By providing such a hole in the tip, the mass of the tip can be reduced, the tip can be appropriately compressed during a shot, the grip of the tip can be improved, and cue misses (the phenomenon of the tip slipping at the moment of contact with the cue ball) can be reduced. In addition, since the force of the tip returning from a compressed state to its original state can be utilized, powerful shots become possible.

[0019] The billiard cue 200 to which the billiard tip of the present invention is attached can be appropriately selected from known billiard cues.

[0020] (Tap shape) The billiard tip 10 of the present invention has a columnar or frustoconical shape having a top surface, a bottom surface, and sides, and preferably a columnar shape, because the surface area of ​​the top surface is large and it is possible to form a large number of holes. Examples of columnar shapes include the cylindrical shape shown in Figure 2A, as well as elliptical columnar shapes and prismatic shapes (triangular columnar shape, square columnar shape, pentagonal columnar shape, hexagonal columnar shape, octagonal columnar shape, etc.), and among these, the cylindrical shape is preferred as it allows for a large area to contact the cue ball. Examples of frustoconical shapes include the frustoconical shape shown in Figure 2B, as well as elliptical frustoconical shapes and pyramidal frustoconical shapes (triangular frustoconical shape, square frustoconical shape, pentagonal frustoconical shape, hexagonal frustoconical shape, octagonal frustoconical shape, etc.).

[0021] Regarding the size of the billiard tip of the present invention, the diameter of the lower surface 10b (the diameter of the circumscribed circle of the lower surface) is preferably 6 mm or more and 16 mm or less, and the tip height (the maximum distance between the upper surface 10a and the lower surface 10b) is preferably 4 mm or more and 10 mm or less. The diameter of the upper surface 10a (the diameter of the circumscribed circle of the upper surface) is the same as the lower surface 10b when the billiard tip is columnar in shape, and preferably 50 to 95% of the diameter of the lower surface 10b when it is frustoconical in shape.

[0022] The upper surface 10a of the billiard tip of the present invention is usually a flat plane, as shown in Figure 3A (a cross-sectional view with the hole omitted as an example of a columnar shape), regardless of whether it is columnar or frustoconical in shape. However, as shown in Figure 3B (a cross-sectional view with the hole omitted as an example of a columnar shape), it is preferable to have a convex surface (preferably a convex curved surface) because it improves the feel when striking the ball. It may also have a concave or concave surface, as shown in Figure 3C (a cross-sectional view with the hole omitted as an example of a columnar shape). If the billiard tip 10 of the present invention is cylindrical and its upper surface is a convex curved surface, the billiard tip itself will have a plano-convex lens shape (Figure 3B).

[0023] (Tap hole) Regarding the holes provided on the top or side surface of the billiard cue tip of the present invention, the number of holes, the position of the holes, the shape of the hole openings, the hole diameter, the hole depth, the hole pattern, etc., can be appropriately selected according to the degree of reduction in the degree of deflection and curve required for the cue tip. Here, the reduction in the degree of deflection means reducing the angle θ between the direction A of the cue ball X struck by the billiard cue and the direction B of the cue ball's trajectory (direction of deflection), as shown in Figure 4, and the reduction in the degree of curve means reducing the ratio of the cue height Y2 to the chord length Y1 of the arc of the curve Y.

[0024] While one hole is sufficient, it is preferable to have multiple holes to ensure that the degree of deflection and curve is reduced regardless of where the cue ball is struck on the top surface of the tip. Depending on the hole diameter, if there are too few holes, the effect of reducing the mass of the billiard tip is insufficient, and if there are too many holes, the billiard tip becomes excessively prone to deformation from the shot, and it becomes difficult for it to reflexively return to its original state, reducing the accuracy of the shot. For vertical holes, as described later, it is preferable to have 10 or more, more preferably 19 or more, preferably 50 or less, and more preferably 39 or less. For horizontal holes, as described later, deformation of the billiard tip from the shot is more likely to occur than with vertical holes, so it is preferable to have 2 or more, more preferably 4 or more, preferably 16 or less, and more preferably 10 or less. For inclined holes, it is preferable to have 2 or more, more preferably 4 or more, preferably 36 or less, and more preferably 12 or less.

[0025] Regarding the position of the hole, if there is only one hole, it may be placed in the center of the top surface of the billiard tip, or it may be placed eccentrically. If there are multiple holes, they may be placed evenly on the top surface of the billiard tip, but it is preferable to have more holes in the central area than in the peripheral area in order to reduce the mass of the central area compared to the peripheral area of ​​the top surface.

[0026] There are no particular restrictions on the shape of the hole opening; examples include circles, equilateral triangles, squares, and ellipses, but a circle is preferred because it is easy to process with a drilling machine. In addition, the hole can also be created with a press machine, but processing with a drilling machine is preferred because it reduces the mass of the tap.

[0027] The hole diameter can be considered as the diameter of the circumscribed circle of the hole, and is preferably 0.1 mm or more, more preferably 0.5 mm or more, more preferably 1.5 mm or less, and more preferably 0.8 mm or less. If the hole diameter is too small, the number of holes to be drilled increases, and the holes become more prone to excessive crushing during the shot blasting. Conversely, if the hole diameter is too large, the rigidity of the tap decreases, and there is a concern that the effect of reducing skipping and curvature will become peaky.

[0028] (If the hole is vertical) The provision of such a hole on the upper surface of a billiard tip will be explained in more detail below, using the plano-convex lens shape (Figure 3B) as an example. In other words, in the billiard tip of the present invention, when a hole is provided from the upper surface 10a toward the lower surface, it may be provided at an angle, but as shown in Figure 5 (cross-sectional view), it is preferable to provide a vertical hole 1a that is provided perpendicularly from the upper surface 10a toward the lower surface 10b. This is because it is easier to form and easier to control the reduction of skipping or curving than in the case of an inclined hole, as the element of the inclination angle does not need to be considered.

[0029] The depth of the vertical hole 1a is preferably 30% or more of the tip thickness in order to clearly obtain the effect of reducing mass. The distance from the bottom surface 10b may be constant (for example, 1 mm from the bottom surface 10b), or as shown in Figure 6 (cross-sectional view), the distance from the bottom surface 10b may be varied, or the hole may penetrate all the way to the bottom surface 10b. In the case where a so-called seat is provided between the ferrule and the tip of the billiard cue, it is preferable to penetrate the vertical hole 1a all the way to the bottom surface 10b.

[0030] The vertical hole pattern when viewing a billiard tip from above can be determined according to the degree to which the desired degree of deflection and curve is reduced. While the holes may be arranged randomly, considering the controllability of the reduction in deflection and curve, it is preferable that the multiple vertical holes be arranged in a line-symmetric pattern where they overlap when folded in a straight line, a point-symmetric pattern where they overlap when rotated 180 degrees, or a rotational-symmetric pattern where they overlap when rotated 30, 45, 60, 90, or 120 degrees. In particular, a rotational-symmetric arrangement is preferred.

[0031] Furthermore, when viewing the billiard tip 10 from above, as shown in Figure 7, it is preferable that there are no vertical holes in the ring-shaped region 10d extending inward from the outer edge of the tip, with a width of 10% to 50% of the radius of the billiard tip. This is to make the outer region of the billiard tip harder and the inner region softer (in other words, more easily crushed by shots).

[0032] (If the hole is horizontal) The provision of holes on the side surface of a billiard tip will be explained in more detail below, using the case of Figure 3A or Figure 3B as an example. Specifically, in the billiard tip of the present invention, when a hole is provided parallel to the bottom surface 10b from the side surface 10c, it may be provided as a groove-shaped horizontal hole 1b on the top surface 10a, as shown in Figure 8A (top perspective view) and Figure 8B (side perspective view from direction C), as a radial (e.g., cross-shaped) horizontal hole 1c in the depth direction, as shown in Figure 9A (top perspective view) and Figure 9B (side perspective view from direction C), or as a grid-like (e.g., square grid-like) horizontal hole 1d in the depth direction, as shown in Figure 10A (top perspective view) and Figure 10B (side perspective view from direction C). Furthermore, when multiple horizontal holes are provided, the distance from the bottom surface 10b may be different for each hole, or every other hole. Also, the horizontal holes may be through-holes.

[0033] (If the hole is at an angle) The provision of a hole on the upper surface of a billiard tip will be explained in more detail below, using the plano-convex lens shape (Figure 3B) as an example. Specifically, in the billiard tip of the present invention, when an inclined hole 1e is provided from the upper surface 10a toward a predetermined position above the center of the lower surface 10b (for example, 1 mm above the center of the lower surface 10b), it can be provided as shown in Figure 11A (top perspective view) and Figure 11B (side perspective view). Alternatively, as shown in Figure 12A (top perspective view) and Figure 12B (side perspective view), a difference in depth may be provided every other hole.

[0034] While the holes were explained separately as vertical, horizontal, and inclined holes, these can also be combined in any way. By combining them, it is expected that it will be possible to control the degree of reduction in jumps and curves at a subtle level.

[0035] (Manufacturing method for billiard cue tips) The billiard tip of the present invention can be manufactured by forming a hole in a billiard tip without a hole, which has been made by a known method, using a commercially available drilling machine or the like, to reduce the degree of skipping and curving as described above. The hole can be filled with a synthetic resin such as urethane resin or silicone resin to adjust the characteristics of the tip as intended.

[0036] (Use of billiard cue tip) As described above, the billiard tip 10 of the present invention is used by being attached with adhesive to the tip of a billiard cue 200, which is connected to a butt 20 and a shaft 21, as shown in Figure 1. Thus, a billiard cue to which the billiard tip 10 of the present invention is attached is also part of the present invention. The billiard cue before the tip is attached can be selected from known billiard cues. [Examples]

[0037] The billiard cue tip of the present invention will be specifically described by examples and comparative examples.

[0038] Example 1 A billiard tip with a plano-convex lens shape (Elk Master 14, manufactured by Tweeten) with a diameter of 14 mm, a thickness of 6.5 mm, and a radius of R9 mm was prepared. Twenty-five vertical holes with a diameter of 0.5 mm were drilled from the top surface to the bottom surface, with a depth of 1 mm from the bottom surface, using a drilling machine to create the billiard tip of Example 1 (see Figure 13 (top view)).

[0039] Example 2 A billiard tip with a plano-convex lens shape (Elkmaster 14, manufactured by Tweeten) with a diameter of 14 mm, a thickness of 6.5 mm, and a radius of R9 mm was prepared, and four horizontal holes with a diameter of 0.8 mm were drilled in a grid pattern at positions 2.5 mm and 3 mm from the bottom surface using a drilling machine to create the billiard tip of Example 2 (see Figure 10A (top perspective view)).

[0040] Example 3 A billiard tip with a plano-convex lens shape (Elkmaster 14, manufactured by Tweeten) with a diameter of 14 mm, a thickness of 6.5 mm, and a radius of R9 mm was prepared, and ten horizontal holes with a diameter of 0.8 mm were drilled in a grid pattern at positions 2.5 mm and 3 mm from the bottom surface using a drilling machine to create the billiard tip of Example 3 (see Figure 14 (top perspective view)).

[0041] Example 4 A plano-convex lens-shaped billiard tip (Elkmaster 14, manufactured by Tweeten) with a diameter of 14 mm, a thickness of 6.5 mm, and a radius of R9 mm was prepared. Six inclined holes each with diameters of 0.8 mm and 1.0 mm were alternately formed using a drilling machine, 1 mm from the center of the bottom surface, to create the billiard tip of Example 4 (see Figure 15 (top perspective view)).

[0042] Comparative Example 1 A billiard tip with a plano-convex lens shape (Elk Master 14, manufactured by Tweeten) with a diameter of 14 mm, a thickness of 6.5 mm, and a radius of R9 mm was prepared and designated as Comparative Example 1, a billiard tip in which no holes were provided on the top or sides.

[0043] (Evaluation test) The billiard tips of Examples 1-3 and Comparative Example 1 were each attached to billiard cues (manufactured by Predator), and professional players were asked to strike the cue ball on the billiard table to evaluate the deflection and curve. The degree of deflection and curve of Examples 1-3 was compared and evaluated using the deflection and curve of Comparative Example 1 as a baseline. As a result, it was felt that the degree of deflection and curve when using the billiard tips of Examples 1-3 was reduced compared to that of Comparative Example 1.

[0044] Furthermore, in the case of the billiard tip of Example 1, which has a vertical hole, the degree of mass reduction near the top surface of the tip is smaller compared to the billiard tips of Examples 2 and 3, which have a horizontal hole, so a feeling of reduced skipping and curving was obtained.

[0045] Comparing the billiard tips of Example 2 and Example 3, which have different numbers of lateral holes, the billiard tip of Example 3, which has more lateral holes, is more prone to deformation. Therefore, the billiard tip of Example 2 gives the impression of having a greater degree of deflection and curvature.

[0046] In the case of the billiard tip of Example 4, which had an inclined hole, the degree of skipping and curving was reduced compared to the billiard tip of Comparative Example 1, but the reduction effect was perceived to be smaller than that of the billiard tips of Examples 1 to 3. [Explanation of symbols]

[0047] 1 hole 1a Vertical hole 1b Groove-shaped horizontal hole 1c Radial horizontal tunnel 1d Grid-like horizontal holes 1e Slanted hole 10 billiard cue tips 10a top surface 10b Bottom side 10c side 10d Ring-shaped region 20 Bats 21 Protective material (tip) 22 shafts 200 Billiard Cues X cue ball A. Direction of impact B. Direction of the cue ball's flight (direction of the jump) θ is the angle between direction A and direction B. Y-curve Y1: Chord length of curve Y Y2 Curve Y Arrow Height

Claims

1. A billiard cue tip, which is attached to the tip of a billiard cue. The aforementioned billiard tip has a columnar or frustoconical shape with an upper surface, a lower surface, and a side surface, the diameter of the lower surface is 6 mm to 16 mm, and the tip height is 4 mm to 10 mm. The aforementioned upper surface has holes to reduce the degree of deflection and curve that occurs when the cue ball is struck with the cue, The aforementioned holes are a plurality of vertical holes formed perpendicularly from the top surface to the bottom surface. A billiard cue tip with each vertical hole having a diameter of 0.1 mm to 1.5 mm.

2. The billiard cue tip according to claim 1, wherein the depth of the vertical hole is 30% or more of the cue tip thickness.

3. The billiard cue tip according to claim 1, wherein the upper surface is a convex curved surface.

4. The billiard cue tip according to claim 1, wherein the vertical hole does not penetrate to the bottom surface.

5. The billiard cue tip according to claim 1, wherein the diameter of the vertical hole is 0.5 mm or more and 0.8 mm or less.

6. The billiard cue tip according to claim 1, wherein the number of vertical holes is 19 or more and 39 or less.

7. A billiard cue having a shaft connected to a butt, wherein the tip of the shaft is fitted with the billiard cue tip described in claim 1.

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