Elliptical billiards aiming training article and method

Abstract

The invention discloses an elliptical billiard aiming training device, comprising a training disc and a training ring; the training disc comprises a pointer, a disc body and rivets; the elliptical billiard aiming training is mainly completed by respectively intersecting the pointer and ellipses 1 and 2 engraved on the disc body to form aiming points to strengthen visual memory; the training ring comprises a ring body and legs, is put on a target ball, and is used to verify the standing distance of a billiard player and adjust the change of the minor axis of the ellipse; the invention can easily find an exact aiming point in the pattern of the aiming training device according to the standing distance between the billiard player and the target ball and from the extension of the goal line at any angle, has a wide adaptability, high accuracy, strong operability, is simple and clear, and is easy to master, and can make up for the shortcomings of aiming methods such as the tail-finding method, the coincidence method, the symmetry method and the double coincidence method; the aiming process is safe and reliable, and has great promotion value.

Description

Technical Field

[0001] The invention belongs to the technical field of billiard aiming training, and in particular relates to an elliptical billiard aiming training article and a method. Background Art

[0002] At present, the mainstream methods of billiards aiming have their own advantages and disadvantages. The tail-finding method is the most basic principle of billiards aiming. The aiming point is a tail behind the target ball. Theoretically, it is the length of the back half of the target ball when looking down at the table. However, in actual operation, it is impossible for billiard players to lie down directly above the table to aim, so there will be errors when aiming with this method, especially for long tables, and usually that's all; the overlap method aims based on the separation angle and the overlap of the cue ball and the target ball. Remember that the correspondence between the separation angle and the overlap is more complicated, and it is very difficult for athletes to determine the separation angle before each hit. It is easy to aim for familiar separation angles and overlaps, but for unfamiliar separation angles, it is not so accurate and not practical every time when the overlap is determined; the symmetry method and the double overlap method are more complicated, not easy to master, and difficult to operate. Summary of the Invention

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide an elliptical billiard aiming training device and method for billiard aiming training, which is used for billiard aiming training. The aiming point is determined according to the distance between the billiard player and the target ball. The device has high accuracy, strong operability, and is simple and easy to operate.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: an elliptical billiard aiming training device, comprising a training disc and a training ring; the characteristics of the present invention are that the training disc is composed of a disc body made of two colorless transparent organic glass plates, a pointer and a rivet, the pointer is located in the gap between the two colorless transparent organic glass plates, and three rivets connect the two superimposed colorless transparent organic glass plates of the disc body; the training ring comprises a ring body made of red transparent organic glass and a support leg, and the support leg is located on the bottom surface of the ring body.

[0005] The disc is used to secure the rivets and pointer. The pointer is black and connected to the disc via three rivets, with the middle rivet used to center the pointer. The middle rivet is located at the geometric center of the disc, with the spacing between the rivets on both sides equal to the major axis of the ellipse, and located at the two endpoints of the major axis of the ellipse. The rivets on both sides limit the pointer, allowing it to rotate 178° around the center of the disc, realistically simulating the angle of the goal line. The disc is engraved with a black ellipse 1, a red ellipse 2, and a yellow overhead aiming point trajectory circle on one side. The centers of these ellipse 1, ellipse 2, and the overhead aiming point trajectory circle coincide with the center of the disc. The center line between the cue ball and the target ball is the reference line for aiming. Before aiming, the tip of the nose should be aligned with the cue ball and the target ball to stand firmly. The pointer of the training disc rotates around the centers of the black ellipse 1, red ellipse 2, and yellow overhead aiming point trajectory circle, accurately simulating aiming at three different angles. After the goal line passes through the center of the target ball, it intersects with ellipse 1, ellipse 2, and the yellow overhead aiming point trajectory circle to form the corresponding aiming point, i.e., the goal point.

[0006] The ring body has a central circular hole that is clearance-fitted with the target ball, and the nominal size of the central circular hole is consistent with that of the target ball. The outer diameter of the ring body is the diameter of the trajectory circle of the aiming point when viewed from above. The legs are bonded at 0.618 of the width of the ring body, and their height is based on the diameter of the target ball so that the plane of the ring body coincides with the horizontal plane of the center of the target ball.

[0007] The major axes of the ellipse 1 and the ellipse 2 are both twice the diameter of the target ball, the ratio of the minor axis of the ellipse 1 to the diameter of the target ball is 1, and the ratio of the minor axis of the ellipse 2 to the diameter of the target ball is 0.5.

[0008] The area of ​​the first ellipse is twice that of the target ball, and is used for aiming at the target ball at close range; the area of ​​the second ellipse is equal to that of the target ball, and is used for aiming at the target ball at long range;

[0009] The angle between the pointer and the center line is the separation angle a; the distance L between the center line and the aiming point is the eccentric distance; the center line is the line connecting the center of the target ball and the center of the cue ball;

[0010] The aiming point can be found on the pattern of the aiming product when aiming at billiard balls at any separation angle.

[0011] The eccentric distance between the cue ball and the target ball corresponding to the same separation angle a remains unchanged.

[0012] The training ring is placed on the target ball to verify the billiards player's stance distance and adjust the change in the minor axis of the ellipse. Based on the two calculated stance distances, the player observes the training ring on the target ball. If the ellipse formed by the ring matches the ellipse on the training disc, the stance distance is accurate; otherwise, fine-tuning is performed. Once the billiards player has mastered aiming at both stance distances, they can fix the stance distance between the cue ball and the player to experience flexible stance distance aiming. During aiming training, the player observes the ellipse formed by the training ring placed on the target ball at different distances from the cue ball, and then forms the aiming point based on the goal line.

[0013] The method for using the oval billiard ball aiming training product comprises the following steps:

[0014] Step 1. First, before use, the billiard player measures and calculates the height H between his eyes and the center of the target ball, and calculates his close-range and long-range stances respectively; the standing distance between the billiard player and the target ball 1 is X, the height between the billiard player's eyes and the center of the target ball is H, and the projection angle in the A direction is β, which can be calculated according to the following formula: X=H / tanβ, where H=the height of the player's eyes from the billiard table - the radius of the billiard ball. The short-range stance is suitable for hitting the billiard ball at close range; the long-range stance is suitable for hitting the billiard ball at long range; a training ring is put on the target ball to verify the standing distance of the billiard player. According to the two calculated standing distances, the training ring on the target ball is observed. If the ellipse formed by the ring matches the ellipse on the training disk, the standing distance is accurate, otherwise it is fine-tuned; since the height of the billiard table, the diameter of the billiard ball and the height of the billiard player are generally constants;

[0015] Step 2: Use the aiming training supplies to practice. There are two forms. One is single-person practice. You can fiddle with the pointer by hand and observe the intersection of the pointer and the ellipse. The intersection is the aiming point, which corresponds to a unique separation angle and eccentricity distance. Practice frequently to form a visual memory. The other is a two-person practice. You stand at the calculated standing position while another person stands at the position of the target ball and fiddles with the pointer. You observe the intersection of the pointer and the ellipse. Practice separately, only looking at one intersection of the pointer with ellipse one or ellipse two at a time. Practice frequently to form a visual memory.

[0016] Step 3. After forming visual memory, when aiming in actual combat, the athlete should align the tip of the nose with the line connecting the center of the cue ball and the target ball, and stand firmly according to the standing distance; if the athlete has a dominant eye, the dominant eye should be aligned with the line connecting the center of the cue ball and the target ball to aim. Extending from the goal line at any angle, the athlete can find an exact aiming point through visual memory. At this time, the athlete should keep his eyes fixed on the aiming point, find the hitting line between the cue ball and the aiming point, stand in a suitable hitting position, lie down and hit the cue ball so that the center of the cue ball coincides with the aiming point, and accurately hit the target ball into the predetermined pocket;

[0017] Step 4. After the billiards player has mastered aiming at two different stance distances, in order to experience the freedom of aiming at different stance distances, the player can fix the distance between the cue ball and the player's stance. During aiming training, observe the ellipses with different minor axes formed by the training ring placed on the target ball at different distances from the cue ball. Then, combine it with the goal line to form the aiming point. Practice frequently to form a visual memory of the changes in the minor axis of the ellipse when hitting the target ball at different distances with a fixed stance.

[0018] Step 5. Repeat step 3 to strengthen your visual memory of finding the aiming point.

[0019] The beneficial effects of the present invention are:

[0020] Compared with existing aiming technologies, the present invention has the advantage of easily finding an exact aiming point in the aiming scheme diagram from any angle of the goal line extension because it adopts a specific stance and elliptical aiming training method tailored to billiard players of different heights.

[0021] Compared with the existing aids for finding the aiming point, the present invention directly uses the training ring to truly simulate the trajectory circles of all aiming points in the tail aiming method, that is, the trajectory circle of the aiming point when looking down. After the billiard players have mastered the aiming at two standing distances, in order to experience the arbitrary standing distance aiming, the standing distance between the cue ball and the long-range player can be fixed. During the aiming training, the ellipse formed by the training ring placed on the target ball at different distances from the cue ball can be observed, and the aiming point can be formed in combination with the goal line. Therefore, it also has the advantage of meeting the personalized training of billiard players.

[0022] This quantitative aiming method completely overcomes the frustration of relying on intuition when aiming in billiards. It has a wide range of applications, high accuracy, strong operability, and is simple, clear, and easy to master. It can also compensate for some of the shortcomings of aiming methods such as the tail-finding method, the coincidence method, the symmetry method, and the double coincidence method. The aiming process is safe and reliable, and has great promotional value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the training disc of the present invention.

[0024] Figure 2 It is a schematic diagram of the aiming scheme of the present invention.

[0025] FIG3( a ) is a diagram showing the aiming principle of the present invention.

[0026] FIG3( b ) is a top view of FIG3( a ) of the present invention.

[0027] FIG3( c ) is a view taken along the line A of FIG3( a ) of the present invention.

[0028] Figure 4 This is a schematic diagram of the structure of the rivets on the training disc of the present invention.

[0029] Figure 5 It is a structural schematic diagram of the training ring of the present invention.

[0030] Figure 6 This is a schematic diagram of the pointer of the present invention after rotating to the extreme positions to the left and right sides respectively.

[0031] In the figure: 1-target ball; 2-ellipse 1; 3-ellipse 2; 4-pointer; 5-looking down at the trajectory circle of the aiming point; 6-center line; 7-aiming point 2; 8-cue ball after being hit; 9; aiming point 1; 10-aiming point 3; 11-disc; 12-rivet; 13-ellipse 4; 14-ring; 15-support leg. DETAILED DESCRIPTION

[0032] The structural principle and working principle of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

[0033] See also Figure 1-5 An elliptical billiard aiming training product includes a training disc and a training ring; the characteristics are that the training disc consists of a disc body 11 made of two colorless transparent organic glass plates, a pointer 4 and a rivet 12, the pointer 4 is arranged in the gap between the two colorless transparent organic glass plates, and three rivets 12 connect the two superimposed colorless transparent organic glass plates of the disc body 11; the training ring includes a ring body 14 made of red transparent organic glass and a support leg 15, and the support leg 15 is arranged on the bottom surface of the ring body 14.

[0034] The disk 11 is used to fix the rivets 12 and the pointer 4; the pointer 4 is black and is connected to the disk 11 by three rivets 12. The middle rivet 12 is used to center the pointer 4. The middle rivet is located at the geometric center of the disk 11. The spacing between the rivets on both sides is equal to the major axis of the ellipse, and they are located at the two end points of the major axis of the ellipse. The rivets on both sides are used to limit the pointer 4, allowing the pointer 4 to rotate 178 degrees around the center of the disk 11. Figure 6The included angle after the pointer rotates to the extreme position to the left and right sides is 178°, which truly simulates the angle of the goal line; the disc body 11 is engraved with a black ellipse 1 2, a red ellipse 2 3 and a yellow downward-looking aiming point trajectory circle 5 on one side. The three colors are eye-catching and have a strong visual sense. The centers of the ellipse 1 2, the ellipse 2 3 and the downward-looking aiming point trajectory circle 5 coincide with the center of the disc body 11; the center line 6 between the cue ball and the target ball is the reference line for aiming. Before aiming, the tip of the nose is connected to the cue ball and the target ball in a straight line and the target ball stands firmly. If you have a dominant eye, the tip of the nose should be replaced by the dominant eye, so that the dominant eye, the cue ball and the target ball are connected in a straight line and the target ball stands firmly. This is the prerequisite for aiming and is very critical, which can improve the stability and accuracy of aiming; the pointer 4 of the training disc rotates around the centers of the black ellipse 1 2, the red ellipse 2 3 and the yellow downward-looking aiming point trajectory circle 5, which can accurately simulate the three different aiming positions. After the goal line passes through the center of the target ball, it intersects with the ellipse 1, the ellipse 2 and the yellow downward-looking aiming point trajectory circle to form a corresponding aiming point, i.e., the goal point.

[0035] The ring body 14 is made of a red transparent organic glass plate. The red color is eye-catching and has a strong visual sense. The outline of the target ball can be seen in the transparent state. The middle circular hole of the ring body 14 is a clearance fit with the target ball 1. The nominal size of the middle circular hole is consistent with the target ball. The outer diameter of the ring body 14 is the diameter of the aiming point trajectory circle 5 when viewed from above. The support legs 15 are bonded to 0.618 of the width of the ring body 14, close to the outside of the ring body 14, and their height is based on the diameter of the target ball, so that the plane of the ring body 14 coincides with the horizontal plane of the center of the target ball. The three support legs are evenly supported in the circumferential direction, and have good stability.

[0036] The major axes of the ellipse 1 2 and the ellipse 2 3 are both twice the diameter of the target ball, the ratio of the minor axis of the ellipse 1 2 to the diameter of the target ball 1 is 1, and the ratio of the minor axis of the ellipse 2 3 to the diameter of the target ball 1 is 0.5.

[0037] The area of ​​the ellipse 1 2 is twice the area of ​​the target ball 1, and is used for aiming at the target ball at close range; the area of ​​the ellipse 2 3 is equal to the area of ​​the target ball 1, and is used for aiming at the target ball at long range.

[0038] The angle between the pointer 4 and the center line 6 is the separation angle a; the distance L between the center line 6 and the aiming point is the eccentric distance.

[0039] The aiming point of the billiard ball at any separation angle can be found on the pattern of the aiming training product.

[0040] The eccentric distance between the cue ball and the target ball corresponding to the same separation angle a remains unchanged, and it does not change with the change of the minor axis of ellipse 12 and ellipse 23.

[0041] In the principle described in the working principle, the standing distance is calculated according to the height of the billiard player, and then the aiming point is determined according to the aiming plan.

[0042] The training ring is placed on the target ball to verify the billiard player's stance distance and adjust the change of the minor axis of the ellipse. According to the two calculated stance distances, the player observes the training ring on the target ball. If the ellipse formed by the ring matches the ellipse on the training disc, the stance distance is accurate. Otherwise, fine-tuning is performed. After the billiard player has mastered the aiming at the two stance distances, the player can fix the stance distance between the cue ball and the long-range player to experience the arbitrary stance distance aiming. During aiming training, the player observes the ellipse formed by the training ring placed on the target ball at different distances from the cue ball, and then forms the aiming point in combination with the goal line.

[0043] like Figure 2 As shown, this aiming scheme is engraved on Figure 1 On the disc 11 in the figure, when the top view is projected vertically onto the billiard table, the pointer 4 intersects with the top view aiming point trajectory circle 5 to form aiming point three 10, which is the aiming point mentioned in the tail-finding method; when the tip of the billiard player's nose coincides with the line connecting the center of the cue ball and the object ball, standing at position I (see Figure 3a ), at this time, pointer 4 and ellipse 2 intersect to form aiming point 9; when the nose tip of the billiard player coincides with the line connecting the center of the cue ball and the target ball, standing at position II (see Figure 3a ), pointer 4 intersects ellipse 23 to form aiming point 27. The athlete then fixes their gaze on the aiming point, finds the hitting line between the cue ball and the aiming point, stands in a suitable hitting position, and then lies down to hit the cue ball individually, aligning the center of the cue ball with the aiming point. This allows the target ball to be accurately pocketed. The separation angle a and eccentric distance L remain unchanged in all three scenarios; only the goal line and the geometric (circular and elliptical) aiming trajectory based on the target ball's contour change.

[0044] The working principle of the present invention is:

[0045] Taking the Chinese Black Eight as an example, its diameter is 57.2 mm, and its working principle is described as follows:

[0046] When the billiards player looks at the target ball 1 from the direction A at an angle β, the downward-looking aiming point trajectory circle 5 transforms into an ellipse 13 (when the plane of a circle is tilted relative to the projection plane, its projection is an ellipse). At this point, the major axis of ellipse 13 is still the diameter of the downward-looking aiming point trajectory circle 5, and the minor axis = the diameter of the downward-looking aiming point trajectory circle 5 * sin β = 2 * (the diameter of the target ball 1) * sin β = 2 * 57.2 * sin β. This is determined by the geometric relationship between circles and ellipses.

[0047] The commonly used ratio of the minor axis of the ellipse 13 to the diameter of the target sphere 1 and the corresponding relationship of the angle β is:

[0048] A ratio of 0.5 corresponds to a β angle of 14.4775°, see Figure 2 Ellipse II 3 in the aiming scheme;

[0049] A ratio of 1 corresponds to a β angle of 30°, see Figure 2 Ellipse 1-2 in the aiming scheme;

[0050] The ratio 2 corresponds to an angle β of 90°, in which case the ellipse is a perfect circle, i.e. Figure 2 The aiming point trajectory circle 5 in the aiming scheme is viewed from above.

[0051] Calculate the standing distance between the billiard player and the object ball 1 according to β angles of 30° and 14.4775°, respectively, when the table surface is 2800×1400 mm and the table height is 850 mm.

[0052] According to the working principle, the standing distance is calculated based on the height of the billiard player, and then the aiming point is determined according to the aiming plan. Here, the standing distance between the billiard player and the target ball 1 is set as X, the height between the billiard player's eyes and the center of the target ball 1 is H, and the projection angle in the A direction is β. It can be calculated according to the following formula: X = H / tan β, where H = the height of the player's eyes from the billiard table - the radius of the billiard ball.

[0053] If the height of the player's eyes from the billiard table is 800 mm, then the height of the eyes from the center of the target ball 1 is H = 800-57.2 / 2 = 771.4 mm. Calculated at an angle of 30°, tan30° = the height of the player's eyes from the center of the target ball (1) / the distance X between the player and the target ball 1. Then the distance X between the player and the target ball 1 should be 1336.1 mm, which is nearly the length of a billiard cue. This distance point is the position I mentioned above, corresponding to Figure 2 The aiming point 9 formed by the ellipse 2 and the pointer 4 in the aiming solution.

[0054] Similarly, according to the β angle of 14.4775°, that is, tan14.4775° = the height of the billiard player's eyes from the center of the target ball 1 / the distance X between the billiard player and the target ball (1), then the distance X between the billiard player and the target ball 1 should be 2987.6 mm, which is nearly the length of two billiard cues. This distance point is the position II mentioned above, which corresponds to Figure 2 The aiming point 7 formed by the ellipse 23 and the pointer 4 in the aiming scheme.

[0055] At this point, the billiards player can select the standing distance and determine the corresponding aiming point according to the aiming plan diagram.

[0056] First, before using this technique, billiard players should measure the height of their eyes from the center of the billiard ball, and calculate their two stance distances according to the technical principles (see the technical principles for the calculation process). The short stance is about the length of one billiard cue, which is suitable for hitting the billiard ball at close range; the long stance is about the length of two billiard cues, which is suitable for hitting the billiard ball at long range. If you want to continue to improve the accuracy, you can quantify the calculated stance distance to millimeters and make it a standard distance. Practice more at this distance facing the target ball on the table. In addition, a training ring can be put on the target ball to verify the stance distance of the billiard player. According to the two calculated stance distances, observe the training ring on the target ball. If you see that the ellipse formed by the ring matches the ellipse on the training disc, the stance distance is accurate, otherwise make fine adjustments.

[0057] Next, refer to the instructions for the aiming training kit. There are two methods. One is solo practice, where you manually fiddle with pointer 4 and observe the intersection of the pointer and the ellipse. This is the aiming point, corresponding to a unique separation angle and eccentric distance. Practice frequently to develop a visual memory. The other is a two-person practice, where you stand at a calculated position (two constant distances) while another person stands at the target ball's position and fiddles with the pointer. You observe the intersection of the pointer and the ellipse (practice separately, only looking at the intersection of the pointer with ellipse 1 or ellipse 2 at a time). (The relationship between distance and corresponding ellipse is described in the technical principles. Practice frequently to develop a visual memory.)

[0058] After forming a visual memory, when aiming in actual combat, the athlete should align the tip of their nose with the line connecting the centers of the cue ball and the object ball, and stand firmly at the desired distance. If the athlete has a dominant eye, they should aim with their dominant eye aligned with the line connecting the centers of the cue ball and the object ball. Extending from any angle along the goal line, visual memory can help one find a precise aiming point.

[0059] When billiard players have mastered the aiming at two standing distances, in order to experience the free standing distance aiming, the distance between the cue ball and the player's standing can be fixed. During aiming training, observe the ellipses with different short axes formed by the training rings placed on the target balls at different distances from the cue ball, and then combine them with the goal line to form the aiming point.

[0060] The method for using the oval billiard ball aiming training product comprises the following steps:

[0061] Step 1. First, before use, the billiard player measures and calculates the height H from his or her eyes to the center of the target ball 1, and calculates his or her close-range and long-range standing positions respectively; the standing distance between the billiard player and the target ball 1 is X, the height between the billiard player's eyes and the center of the target ball 1 is H, and the projection angle in the A direction is β, which can be calculated according to the following formula: X=H / tanβ, where H=the height of the player's eyes from the billiard table - the radius of the billiard ball. The short-range standing position is suitable for hitting the billiard ball at close range; the long-range standing position is suitable for hitting the billiard ball at long distance; a training ring is put on the target ball to verify the standing distance of the billiard player, and according to the two calculated standing distances, the training ring on the target ball is observed. If the ellipse formed by the ring matches the ellipse on the training disk, the standing distance is accurate, otherwise fine-tuning is performed; since the height of the billiard table, the diameter of the billiard ball and the height of the billiard player are generally constant, this step only needs to be performed once and does not need to be repeated;

[0062] Step 2: Use the aiming training kit to practice. There are two forms. One is single-person practice. One person fiddles with the pointer 4 by hand and observes the intersection of the pointer and the ellipse. The intersection is the aiming point, which corresponds to a unique separation angle and eccentricity distance. Practice frequently to form a visual memory. The other is two-person practice. One person stands at a calculated standing position while another person stands at the position of the target ball and fiddles with the pointer. The other person observes the intersection of the pointer and the ellipse. Practice separately, only looking at one intersection of the pointer with ellipse 1 or ellipse 2 at a time. Practice frequently to form a visual memory.

[0063] Step 3. After forming visual memory, when aiming in actual combat, the athlete should align the tip of the nose with the line connecting the center of the cue ball and the target ball, and stand firmly according to the standing distance; if the athlete has a dominant eye, the dominant eye should be aligned with the line connecting the center of the cue ball and the target ball to aim. Extending from the goal line at any angle, the athlete can find an exact aiming point through visual memory. At this time, the athlete should keep his eyes fixed on the aiming point, find the hitting line between the cue ball and the aiming point, stand in a suitable hitting position, lie down and hit the cue ball so that the center of the cue ball coincides with the aiming point, and accurately hit the target ball into the predetermined pocket;

[0064] Step 4. After the billiards player has mastered aiming at two different stance distances, in order to experience the freedom of aiming at different stance distances, the player can fix the distance between the cue ball and the player's stance. During aiming training, observe the ellipses with different minor axes formed by the training ring placed on the target ball at different distances from the cue ball. Then, combine it with the goal line to form the aiming point. Practice frequently to form a visual memory of the changes in the minor axis of the ellipse when hitting the target ball at different distances with a fixed stance.

[0065] Step 5. Repeat step 3 to strengthen your visual memory of finding the aiming point.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that in this technical field, several improvements and modifications can be made without departing from the present invention, and these improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An elliptical billiard aiming training product, comprising a training disc and a training ring; characterized in that: The training disc is composed of a disc body (11) made of two colorless transparent organic glass plates, a pointer (4) and a rivet (12). The pointer (4) is set in the gap between the two colorless transparent organic glass plates. Three rivets (12) connect the two superimposed colorless transparent organic glass plates of the disc body (11); the training ring includes a ring body (14) made of red transparent organic glass and a support leg (15). The support leg (15) is set on the bottom surface of the ring body (14); the disc body (11) is engraved with a black ellipse (2), a red ellipse (3) and a yellow overhead aiming point trajectory circle (5) on one side. The ellipse (2), The centers of the second ellipse (3) and the downward-looking aiming point trajectory circle (5) coincide with the center of the disk body (11); the middle circular hole of the ring body (14) and the target ball (1) are clearance-fitted, the nominal size of the middle circular hole is consistent with that of the target ball (1), and the outer diameter of the ring body (14) is equal to the diameter of the downward-looking aiming point trajectory circle (5); the ellipse formed by the ring body (14) is observed to be the same as the ellipse on the training disk to verify the accuracy of the standing distance; the pointer (4) rotates around the center of the disk body (11), simulates the goal line and intersects with the first ellipse (2), the second ellipse (3) and the downward-looking aiming point trajectory circle (5) to form an aiming point; The disk body (11) is used to fix the rivet (12) and the pointer (4); the pointer (4) is black and is connected to the disk body (11) through three rivets (12), the middle rivet (12) is used to center the pointer (4), and the middle rivet is set at the geometric center of the disk body 11.

2. The oval billiard aiming training product according to claim 1, characterized in that: The spacing between the rivets on both sides is equal to the major axis of the ellipse, and they are respectively located at the two end points of the major axis of the ellipse. The rivets on both sides are used to limit the pointer (4), so that the pointer (4) rotates 178 degrees around the center of the disc body (11); the angle of the goal line is truly simulated; the center line (6) between the mother ball and the target ball is the reference line for aiming, and before aiming, the nose tip is connected to the mother ball and the target ball in a line and stands firmly; the pointer (4) of the training disc rotates around the center of the black ellipse 1 (2), the red ellipse 2 (3) and the yellow overhead aiming point trajectory circle (5), which can accurately simulate the goal line passing through the center of the target ball when aiming at three different angles, and intersecting with the ellipse 1, the ellipse 2 and the yellow overhead aiming point trajectory circle to form corresponding aiming points, namely the goal points.

3. The oval billiard aiming training product according to claim 1, characterized in that: The legs (15) are bonded to the ring body (14) at 0.618 of its width, and their height is based on the diameter of the target ball so that the plane of the ring body (14) coincides with the horizontal plane of the center of the target ball.

4. The oval billiard aiming training product according to claim 2, characterized in that: The major axes of the ellipse 1 (2) and the ellipse 2 (3) are both twice the diameter of the target sphere, the ratio of the minor axis of the ellipse 1 (2) to the diameter of the target sphere (1) is 1, and the ratio of the minor axis of the ellipse 2 (3) to the diameter of the target sphere (1) is 0.

5.

5. The oval billiard aiming training product according to claim 4, characterized in that: The area of ​​the ellipse 1 (2) is twice the area of ​​the target ball (1), and is used for aiming at the target ball at close range; the area of ​​the ellipse 2 (3) is equal to the area of ​​the target ball (1), and is used for aiming at the target ball at long range; The angle between the pointer (4) and the center line (6) is the separation angle a; the distance L between the center line (6) and the aiming point is the eccentric distance; the center line is the line connecting the center of the target ball and the center of the cue ball; when aiming at billiard balls with any separation angle, a unique aiming point can be found on the pattern of the aiming training product; the eccentric distance between the cue ball and the target ball corresponding to the same separation angle a remains unchanged.

6. The oval billiard aiming training product according to claim 3, characterized in that: The training ring can be put on the target ball to verify the standing distance of the billiard players and adjust the changes of the minor axis of the ellipse.

7. A method for using the oval billiard ball aiming training product according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1. First, before use, the billiard player measures and calculates the height H between his eyes and the center of the target ball (1), and calculates his close-range standing position and long-range standing position respectively; the standing distance between the billiard player and the target ball (1) is X, the height between the billiard player's eyes and the center of the target ball (1) is H, and the projection angle in the A direction is β, which can be calculated according to the following formula: X=H / tanβ, where H=the height of the player's eyes from the billiard table - the radius of the billiard ball. The short-range standing position is used for hitting the billiard ball at close range; the long-range standing position is used for hitting the billiard ball at long range; a training ring is put on the target ball to verify the standing distance of the billiard player. According to the two calculated standing distances, the training ring on the target ball is observed. If the ellipse formed by the ring matches the ellipse on the training disc, the standing distance is accurate, otherwise it is fine-tuned; since the height of the billiard table, the diameter of the billiard ball and the height of the billiard player are generally constants; Step 2, start training with the aiming training supplies. There are two forms. One is single-person practice, where one person fiddles with the pointer (4) by hand and observes the intersection of the pointer and the ellipse. The intersection is the aiming point, which corresponds to a unique separation angle and eccentricity distance. Frequent practice forms a visual memory. The other is two-person practice, where one person stands at a calculated standing position while another person stands at the position of the target ball and fiddles with the pointer. The person observes the intersection of the pointer and the ellipse. The two people practice separately, only looking at one intersection of the pointer with ellipse 1 or ellipse 2 at a time. Frequent practice forms a visual memory. Step 3. After forming visual memory, when aiming in actual combat, the athlete should align the tip of the nose with the line connecting the center of the cue ball and the target ball, and stand firmly according to the standing distance; if the athlete has a dominant eye, the dominant eye should be aligned with the line connecting the center of the cue ball and the target ball to aim. Extending from the goal line at any angle, the athlete can find an exact aiming point through visual memory. At this time, the athlete should keep his eyes fixed on the aiming point, find the hitting line between the cue ball and the aiming point, stand in a suitable hitting position, lie down and hit the cue ball so that the center of the cue ball coincides with the aiming point, and accurately hit the target ball into the predetermined pocket; Step 4. After the billiards player has mastered aiming at two different stance distances, in order to experience the freedom of aiming at different stance distances, the player can fix the distance between the cue ball and the player's stance. During aiming training, observe the ellipses with different minor axes formed by the training ring placed on the target ball at different distances from the cue ball. Then, combine it with the goal line to form the aiming point. Practice frequently to form a visual memory of the changes in the minor axis of the ellipse when hitting the target ball at different distances with a fixed stance. Step 5. Repeat step 3 to strengthen your visual memory of finding the aiming point.

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