High-precision cue ball tripod

Abstract

This invention discloses a high-precision ball-spinning tripod for billiards, applicable to the field of billiards-related technology. A spring plunger connects the bottom and top triangular frames, allowing the top triangular frame to automatically rise and smoothly separate from the ball after placement, effectively avoiding the ball's deviation caused by friction between the frame's inner wall and the ball when manually lifted using traditional ball-spinning tripods. Three sets of external laser rangefinders on the mounting plate can measure the distance between the tripod and the three edges of the billiard table in real time, enabling precise fine-tuning of the overall placement position and significantly improving the positioning accuracy of the ball. Furthermore, the added separation aid component, through the sliding cooperation of the guide groove and guide side plate, provides a limiting and guiding function to the bottom triangular frame during vertical lifting, further reducing the risk of touching the ball due to shaking during manual operation. This significantly improves the overall stability and accuracy of the ball placement, reducing the time spent on repeated placement operations.

Description

Technical Field

[0001] This invention relates to the field of billiards-related technology, and in particular to a high-precision ball-spinning tripod for billiards. Background Technology

[0002] Billiards is an indoor sport that demands extremely high precision in ball placement. The ball-setting tripod, as a core tool for setting the balls before the start of a game, directly impacts the accuracy of ball placement and the overall gaming experience. Traditional billiards tripods are mostly fixed frame structures. When the tripod is lifted after placement, the inner wall of the frame can easily pull against the balls, causing ball misalignment or requiring repositioning, thus increasing preparation time.

[0003] To address the aforementioned issues, Chinese utility model patent CN222871293U discloses a detachable triangular frame for a billiard ball holder, which achieves frame angle adjustment and storage functions through a rotatably connected first and second connecting rod. Chinese invention patent CN106237607A discloses a positioning method for a billiard ball holder and its positioning system, which achieves high-precision and rapid positioning through a combination of a crosshair generator and preset positioning markers.

[0004] However, existing technologies still have shortcomings in terms of stability when the ball rack is separated from the billiard ball: on the one hand, it is difficult to avoid disturbing the billiard ball during the separation process; on the other hand, there is a lack of precise calibration methods for the overall placement of the ball rack, which makes it difficult to meet the needs of high-precision competitive scenarios. Summary of the Invention

[0005] The core of this invention lies in using a spring plunger to connect the bottom and top triangular frames. After the ball is placed, the top triangular frame automatically rises under the spring's rebound force and smoothly separates from the ball, solving the problem of ball misalignment caused by friction between the inner wall of the frame and the ball when lifted in traditional ball-placers. Simultaneously, three sets of external laser rangefinders measure the distance between the tripod and the edge of the billiard table in real time, resolving the difficulty in accurately calibrating the overall placement of the ball-placer.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A high-precision ball-spinning tripod for billiards includes a bottom triangular frame, a top triangular frame above the bottom triangular frame, three spring plungers between the top and bottom triangular frames, the three spring plungers corresponding to the triangular parts of the bottom triangular frame, and a mounting plate fixedly installed at the middle of the outer end of one side of the bottom triangular frame. External laser rangefinders are installed at the left and right ends and the front end of the mounting plate. The upper end of the bottom triangular frame has three mounting holes corresponding to the three spring plungers. The spring plunger includes an outer sleeve fixedly connected to the mounting hole, a push rod inserted into the outer sleeve, and a compression spring placed in the outer sleeve. The compression spring is located at the bottom of the push rod and abuts against the push rod. The upper part of the push rod extends into the top triangular frame, and the top triangular frame and the push rod are fastened together by screws. When multiple billiard balls are in contact with each other and with the inner wall of the top triangular frame, none of the billiard balls are in contact with the bottom triangular frame.

[0008] Furthermore, the top stick is located between the top triangle and the outer sleeve. When no external force is applied, the top triangle does not contact the outer sleeve. When the lower end of the top triangle contacts the upper end of the outer sleeve, the inner wall of the top triangle contacts multiple billiard balls on the inner side of the bottom triangle, and the contact point is located above the center point of the billiard balls.

[0009] Furthermore, two long grooves are carved at the upper ends of two edges of the top triangular frame, and a locking strip is inserted into the long groove. Two symmetrical bottom sloping grooves arranged in a V-shape are carved at the middle of the upper end of the last edge of the top triangular frame. Two side sloping grooves are carved at the middle of the upper end of the two long grooves respectively. The two bottom sloping grooves coincide with the center lines of the two side sloping grooves respectively, and the two ends of the locking strip are matched with the bottom sloping grooves and the side sloping grooves at the same time.

[0010] Optionally, the bottom triangular frame is provided with separation aid components at the corners on both sides of the mounting plate. Guide grooves are carved on the outer walls of both sides of the corners of the bottom triangular frame, and the separation aid components slide and match the guide grooves.

[0011] Furthermore, the separation aid includes an edge-fitting base plate that contacts the corner of the bottom triangular frame, two guide side plates that are fixedly connected to the ends of the two arms of the edge-fitting base plate near the bottom triangular frame, and an arc-shaped counterweight block that is fixedly connected to the upper end of the edge-fitting base plate. The two ends of the arc-shaped counterweight block are respectively opposite to the edges of the two guide side plates, and the two guide side plates are respectively matched with the two guide grooves.

[0012] Furthermore, the separation aid also includes multiple guide rods respectively disposed on the two guide side plates. The guide rods sequentially move through the top of the guide groove and the top triangular frame and extend to the top of the top triangular frame. The guide rods include a thin rod body and a thick rod head fixedly connected to the top of the thin rod body.

[0013] Furthermore, the thin rod body is fixedly connected to the upper end of the guide side plate, the thick rod head is coaxially arranged with the thin rod body, and the diameter of the thick rod head is larger than the inner diameter of the hole through which the thin rod body penetrates the top triangular frame.

[0014] Optionally, the thin rod is inserted into the guide side plate, and the guide rod is equipped with a self-tightening unit. The self-tightening unit includes an internal laser rangefinder located in the thick rod head and an electromagnetic plate fixedly embedded in the guide side plate. After being energized, the electromagnetic plate generates a magnetic attraction force on the thick rod head. A controller is also installed on the bottom triangular frame, and the self-tightening unit is connected to the controller via a signal.

[0015] Furthermore, the thin rod body and the thick rod head are eccentrically positioned, and a monitoring groove is chiseled at the lower end of the thick rod head. An internal laser rangefinder is installed at the top of the monitoring groove, and a transparent sealing plate is fixedly embedded at the lower opening of the monitoring groove.

[0016] Furthermore, when the thick rod head contacts the top triangular frame, the guide side plate and the guide groove are completely separated. During use, the electromagnetic plate is energized, and the thick rod head and the guide side plate are in a fixed plug-in state. When the distance between the top triangular frame and the thick rod head reaches the height of the overlapping part of the thick rod head and the guide side plate, the electromagnetic plate is de-energized.

[0017] Compared with the prior art, the advantages of this invention are: (1) The bottom triangle frame and the top triangle frame are connected by a spring plunger so that after the ball is placed, the top triangle frame can be automatically raised and smoothly separated from the billiard ball under the action of the spring rebound force, which effectively avoids the problem of ball deviation caused by friction between the inner wall of the frame and the billiard ball when the traditional ball rack is manually lifted; by setting three sets of external laser rangefinders on the mounting plate, the distance between the tripod and the three sides of the billiard table can be measured in real time, realizing precise fine adjustment of the overall placement position and greatly improving the positioning accuracy of the ball; in addition, the added separation aid component plays a limiting and guiding role on the bottom triangle frame during the vertical lifting process through the sliding cooperation of the guide groove and the guide side plate, further reducing the risk of touching the billiard ball due to shaking during manual operation, thereby significantly improving the stability and accuracy of the ball placement and reducing the operation time of repeated ball placement. Attached Figure Description

[0018] Figure 1 This is an exploded view of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram showing the relative position of the bottom triangle frame and the billiard ball after the billiard ball position is finely adjusted according to the present invention; Figure 5 This is a perspective view of the present invention after the addition of the separation aid component; Figure 6 This is a schematic diagram of the pendulum tripod moving upwards after the addition of the separation aid component; Figure 7 This is a partial perspective view of the separation aid component of the present invention; Figure 8 This is a schematic diagram of the top of the guide rod after the addition of the self-tightening unit in this invention; Figure 9 This is a cross-sectional schematic diagram of the guide side plate after the addition of the self-tightening unit in this invention; Figure 10 A three-dimensional schematic diagram of the addition of a locking strip to the top triangular frame of the present invention; Figure 11 This is a schematic diagram of the top triangular frame of the present invention when used in American nine-ball after adding a locking strip.

[0019] Explanation of the labels in the diagram: 1. Bottom triangular frame, 101. Guide groove, 2. Top triangular frame, 201. Long strip groove, 202. Locking strip, 203. Bottom inclined groove, 204. Side inclined groove, 3. Spring plunger, 31. Outer sleeve, 32. Compression spring, 33. Top rod, 4. Mounting plate, 401. External laser rangefinder, 5. Separation aid assembly, 51. Edge-attached bottom plate, 52. Arc-shaped counterweight, 53. Guide side plate, 6. Guide rod, 61. Thin rod body, 62. Thick rod head, 601. Monitoring groove, 71. Internal laser rangefinder, 72. Transparent sealing plate, 73. Electromagnetic plate. Detailed Implementation

[0020] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0021] First implementation method: like Figures 1-2 A high-precision ball-spinning tripod for billiards includes a bottom triangular frame 1, a top triangular frame 2 above the bottom triangular frame 1, three spring plungers 3 between the top triangular frame 2 and the bottom triangular frame 1, the three spring plungers 3 respectively corresponding to the triangular part of the bottom triangular frame 1, a mounting plate 4 is fixedly installed at the middle of the outer end of one side of the bottom triangular frame 1, and an external laser rangefinder 401 is installed at the left and right ends and the front end of the mounting plate 4. The upper end of the bottom triangular frame 1 has three mounting holes corresponding to the three spring plungers 3. The spring plunger 3 includes an outer sleeve 31 fixedly connected to the mounting hole, a push rod 33 inserted into the outer sleeve 31, and a compression spring 32 placed in the outer sleeve 31. The compression spring 32 is located at the bottom of the push rod 33 and abuts against the push rod 33. The upper part of the push rod 33 extends into the top triangular frame 2, and the top triangular frame 2 and the push rod 33 are fastened together by screws.

[0022] The top rod 33 is located between the top triangular frame 2 and the outer sleeve 31. Under normal circumstances, the top triangular frame 2 does not contact the outer sleeve 31. When the lower end of the top triangular frame 2 contacts the upper end of the outer sleeve 31, the inner wall of the top triangular frame 2 abuts against the multiple billiard balls inside the bottom triangular frame 1, and the contact point is located above the center point of the billiard ball. This effectively ensures that after the user releases their hand, the top triangular frame 2 can automatically rebound under the action of the spring plunger 3, thereby enabling the top triangular frame 2 to stably separate from the billiard ball and making it less likely for the billiard ball to change position during the separation process. In the figure, a represents the billiard ball.

[0023] like Figures 3-4 When multiple billiard balls are in contact with each other and the inner wall of the top triangular frame 2, none of the billiard balls are in contact with the bottom triangular frame 1. When the top triangular frame 2 is pressed down, causing multiple billiard balls to contact the top triangular frame 2, and then the top triangular frame 2 is released, the top triangular frame 2 separates from the multiple billiard balls under the restoring elastic force of the spring plunger 3. At this time, the bottom triangular frame 1 also does not contact the billiard balls. Therefore, when the tripod is removed, friction and collision between it and the billiard balls are less likely to occur, thus making it less likely to affect its stability.

[0024] In use, first place the ball-swinging tripod in the designated position on the billiard table, and place multiple billiard balls inside the space enclosed by the bottom triangular frame 1. Then, use three external laser rangefinders 401 to measure the distance between each ball and the corresponding three edges of the billiard table, and make fine adjustments to the position so that the data from the left and right external laser rangefinders 401 are consistent, while controlling the data from the middle external laser rangefinder 401 to reach the target data, thus completing the fine adjustment of the overall position. At this time, manually press the top triangular frame 2 until its lower end contacts the upper ends of the three spring plungers 3, so that the multiple billiard balls come into contact with each other and with the inner wall of the top triangular frame 2, thereby achieving fine adjustment of the position of the multiple billiard balls. After that, release the pressure on the top triangular frame 2, allowing the top triangular frame 2 to naturally rise under the rebound force of the spring plungers 3 and separate from the billiard balls. Finally, remove the outer wall of the bottom triangular frame 1 and slowly remove the ball-swinging tripod in the vertical direction to complete the ball-swinging process. Compared to the existing technology where the billiard ball is positioned by directly contacting the inner wall of the bottom triangular frame 1, the addition of the top triangular frame 2 and spring plunger 3 allows the initial separation of the ball from the tripod to rely on the elasticity of the spring plunger 3, rather than manual control. This effectively avoids the situation where the billiard ball is accidentally displaced due to uncontrollable human factors. At the same time, in conjunction with the real-time distance measurement of the external laser rangefinder 401, the accuracy of the ball placement is greatly improved.

[0025] Second implementation method: This embodiment adds a separation aid component 5 to the first embodiment, while the rest remains the same as the first embodiment.

[0026] like Figure 5At the corners of the bottom triangular frame 1 on both sides of the mounting plate 4, there are separation aid components 5. Guide grooves 101 are carved on the outer walls of both sides of the corners of the bottom triangular frame 1. The separation aid components 5 slide and match with the guide grooves 101. The separation aid components 5 include an edge-fitting base plate 51 that contacts the corner of the bottom triangular frame 1, two guide side plates 53 that are fixedly connected to the ends of the two arms of the edge-fitting base plate 51 near the bottom triangular frame 1, and an arc-shaped counterweight block 52 that is fixedly connected to the upper end of the edge-fitting base plate 51. The two ends of the arc-shaped counterweight block 52 are opposite to the edges of the two guide side plates 53, and the two guide side plates 53 match the two guide grooves 101 respectively.

[0027] like Figure 7 The separation aid component 5 also includes a plurality of guide rods 6 respectively disposed on the two guide side plates 53. The guide rods 6 sequentially move through the top of the guide groove 101 and the top triangular frame 2 and extend to the top of the top triangular frame 2. The guide rod 6 includes a thin rod body 61 and a thick rod head 62 fixedly connected to the top of the thin rod body 61. The thin rod body 61 is fixedly connected to the upper end of the guide side plate 53.

[0028] The thicker rod head 62 and the thinner rod body 61 are coaxially arranged, and the diameter of the thicker rod head 62 is larger than the inner diameter of the hole through which the thinner rod body 61 penetrates the top triangular frame 2. This effectively ensures that when the pendulum tripod is removed upwards, after the top triangular frame 2 contacts the thinner rod body 61, the pendulum tripod can be removed from the billiard table along with the separation aid component 5.

[0029] It is worth noting that the height of the upper surface of the arc-shaped counterweight 52 is lower than the height of the laser emitted by the external laser rangefinder 401, so that the setting of the separation aid component 5 does not easily affect the external laser rangefinder 401's control over the position of the pendulum tripod.

[0030] In use, after adjusting the position of the billiard ball, the top triangle 2 automatically rebounds under the action of the spring plunger 3. Then, holding the bottom triangle 1, the tripod is lifted vertically upwards. At this time, the edge-mounted base plate 51 remains on the billiard table. Due to the counterweight 52, the contact between the two edge-mounted base plates 51 and the table remains stable. The guide side plate 53 and the two guide rods 6 can then limit the lifting of the bottom triangle 1, thus assisting in the stable vertical upward lifting of the bottom triangle 1. Figure 6 The separation aid component 5 will only separate from the billiard table after the thin rod 61 contacts the top triangular frame 2. Since the separation aid component 5 is located on the outer perimeter of the bottom triangular frame 1, the distance between it and the billiard ball is relatively large. Therefore, when lifting the separation aid component 5 located below, the stability requirement for raising the bottom triangular frame 1 is lower. Compared with the first implementation method, this effectively reduces the impact on the ball placement accuracy caused by accidental contact with the billiard ball due to hand tremors during manual lifting, further improving the ball placement accuracy and reducing the probability of repeated ball placement.

[0031] The third implementation method: This embodiment changes the connection method between the guide rod 6 and the guide side plate 53 based on the second embodiment, and adaptively adds a self-tightening unit.

[0032] like Figures 8-9 The thin rod 61 is inserted into the guide side plate 53, and the guide rod 6 is equipped with a self-relaxing unit. The self-relaxing unit includes an internal laser rangefinder 71 located in the thick rod head 62 and an electromagnetic plate 73 fixedly embedded in the guide side plate 53. When the electromagnetic plate 73 is energized, it generates a magnetic attraction force on the thick rod head 62, so that the self-relaxing unit is connected to the bottom triangular frame 1 under normal conditions, which facilitates the initial ball swing. A controller is also installed on the bottom triangular frame 1, and the self-relaxing unit is connected to the controller signal.

[0033] The thin rod body 61 and the thick rod head 62 are eccentrically positioned. A monitoring groove 601 is carved into the lower end of the thick rod head 62. An internal laser rangefinder 71 is installed at the top of the monitoring groove 601. The laser emitted by the internal laser rangefinder 71 passes through the transparent sealing plate 72 and falls on the upper surface of the top triangular frame 2. The transparent sealing plate 72 is fixedly embedded in the lower opening of the monitoring groove 601. When the thick rod head 62 contacts the top triangular frame 2, the guide side plate 53 is completely separated from the guide groove 101. In use, the electromagnetic plate 73 is energized, and at this time, the thick rod head 62 and the guide side plate 53 are in a fixed insertion state. When the distance between the top triangular frame 2 and the thick rod head 62 is... When the height of the overlap between the thick rod head 62 and the guide side plate 53 is reached, the electromagnetic plate 73 is de-energized. This effectively ensures that during the process of lifting the pendulum tripod, before the top triangular frame 2 approaches and contacts the thick rod head 62, the connection between the thin rod body 61 and the guide side plate 53 is automatically released, allowing the thin rod body 61 and the guide side plate 53 to have a simple plug-in connection. As the tripod continues to rise, it can directly separate from the separation aid component 5, effectively ensuring that there is no jerking sensation during separation. This effectively avoids the situation where the pendulum tripod displacement is too large due to jerking sensation and touches the billiard ball.

[0034] The electromagnetic plate 73 is powered on and off by two switches. One switch is a push switch installed on the edge base plate 51, and the other switch is a signal switch controlled by a controller. This part is existing technology and therefore will not be described in detail.

[0035] In use, the electromagnetic plate 73 is energized, and the self-tensioning unit is integrated with the bottom triangular frame 1 for easy initial ball placement. After the overall position of the triangular ball stand and the position of the billiard ball are finely adjusted, the top triangular frame 2 is released and automatically resets. Then, the bottom triangular frame 1 is lifted. When the distance data obtained by the inner laser rangefinder 71 decreases to the threshold, the controller controls the electromagnetic plate 73 to de-energize. At this time, the self-tensioning unit separates from the bottom triangular frame 1, realizing the independent removal of the ball-swinging tripod. Then, without the bottom triangular frame 1 and the top triangular frame 2 obstructing the view, the two separation aid components 5 are removed. Compared with the second implementation method, this ball-swinging tripod and separation aid components 5 are removed from the billiard table in steps, further avoiding the problem of touching the billiard ball due to human factors such as obstructed view and hand tremors, which affects the placement accuracy. This further enhances the placement accuracy and further reduces the problem of repeated ball placement.

[0036] Fourth implementation method: like Figure 10 Two elongated grooves 201 are carved at the upper ends of two edges of the top triangular frame 2, and a locking strip 202 is engaged within the grooves 201. Two symmetrical, V-shaped bottom beveled grooves 203 are carved at the middle of the upper end of the last edge of the top triangular frame 2. Two side beveled grooves 204 are carved at the middle of the upper ends of the two elongated grooves 201. The center lines of the two bottom beveled grooves 203 and the two side beveled grooves 204 coincide, and both ends of the locking strip 202 simultaneously match the bottom beveled grooves 203 and the side beveled grooves 204. In use, the two locking strips 202 can be removed from the two elongated grooves 201 respectively. Figure 11 Then, the two are respectively attached to the bottom bevel groove 203 and the side bevel groove 204 on the same side, so as to form a rhomboid space with the top corner of the top triangular frame 2, thus adapting to the way American nine-ball is played, thereby effectively improving the applicability of this tripod.

[0037] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A high-precision ball-spinning tripod for billiards, comprising a base triangular frame (1), characterized in that: A top triangular frame (2) is provided above the bottom triangular frame (1). Three spring plungers (3) are provided between the top triangular frame (2) and the bottom triangular frame (1). The three spring plungers (3) correspond to the triangular part of the bottom triangular frame (1). A mounting plate (4) is fixedly installed at the middle of the outer end of one side of the bottom triangular frame (1). An external laser rangefinder (401) is installed at the left and right ends and the front end of the mounting plate (4). The upper end of the bottom triangular frame (1) has three mounting holes corresponding to the three spring plungers (3). The spring plunger (3) includes an outer sleeve (31) fixedly connected to the mounting hole, a top rod (33) inserted in the outer sleeve (31), and a compression spring (32) placed in the outer sleeve (31). The compression spring (32) is located at the bottom of the top rod (33) and abuts against the top rod (33). The upper part of the top rod (33) extends into the top triangular frame (2), and the top triangular frame (2) and the top rod (33) are fastened together by screws. When multiple billiard balls contact each other and the inner wall of the top triangular frame (2), multiple billiard balls do not contact the bottom triangular frame (1).

2. The high-precision ball-spinning tripod for billiards according to claim 1, characterized in that: The top rod (33) is located between the top triangular frame (2) and the outer sleeve (31). When no external force is applied, the top triangular frame (2) does not contact the outer sleeve (31). When the lower end of the top triangular frame (2) contacts the upper end of the outer sleeve (31), the inner wall of the top triangular frame (2) abuts against multiple billiard balls on the inner side of the bottom triangular frame (1), and the contact point is located above the center point of the billiard balls.

3. A high-precision ball-spinning tripod for billiards according to claim 2, characterized in that: The top triangular frame (2) has two long grooves (201) carved at the upper ends of its two edges. A locking strip (202) is inserted into the long groove (201). The top triangular frame (2) has two symmetrical bottom grooves (203) carved at the middle of the upper end of its last edge. The two long grooves (201) have two side grooves (204) carved at the middle of the upper end of their respective ends. The two bottom grooves (203) coincide with the center lines of the two side grooves (204), and the two ends of the locking strip (202) are matched with the bottom grooves (203) and the side grooves (204) at the same time.

4. A high-precision ball-spinning tripod for billiards according to claim 1, characterized in that: The bottom triangular frame (1) is provided with separation aid components (5) at the corners on both sides of the mounting plate (4). The outer walls on both sides of the corners of the bottom triangular frame (1) are provided with guide grooves (101). The separation aid components (5) slide and match with the guide grooves (101).

5. A high-precision ball-spinning tripod for billiards according to claim 4, characterized in that: The separation aid component (5) includes an edge-fitting base plate (51) that contacts the corner of the bottom triangular frame (1), two guide side plates (53) that are fixedly connected to the two arms of the edge-fitting base plate (51) near the bottom triangular frame (1) and an arc-shaped counterweight block (52) that is fixedly connected to the upper end of the edge-fitting base plate (51). The two ends of the arc-shaped counterweight block (52) are opposite to the edges of the two guide side plates (53), and the two guide side plates (53) are respectively matched with the two guide grooves (101).

6. A high-precision ball-spinning tripod for billiards according to claim 5, characterized in that: The separation aid assembly (5) also includes a plurality of guide rods (6) respectively disposed on two guide side plates (53). The guide rods (6) sequentially move through the top of the guide groove (101) and the top triangular frame (2) and extend to the top of the top triangular frame (2). The guide rods (6) include a thin rod body (61) and a thick rod head (62) fixedly connected to the top of the thin rod body (61).

7. A high-precision ball-spinning tripod for billiards according to claim 6, characterized in that: The thin rod (61) is fixedly connected to the upper end of the guide side plate (53), the thick rod head (62) is coaxially arranged with the thin rod (61), and the diameter of the thick rod head (62) is larger than the inner diameter of the hole through which the thin rod (61) penetrates the top triangular frame (2).

8. A high-precision ball-spinning tripod for billiards according to claim 6, characterized in that: The thin rod (61) is inserted into the guide side plate (53), and the guide rod (6) is provided with a self-tightening unit. The self-tightening unit includes an internal laser rangefinder (71) located in the thick rod head (62) and an electromagnetic plate (73) fixedly embedded in the guide side plate (53). The electromagnetic plate (73) generates a magnetic attraction force on the thick rod head (62) after being energized. A controller is also installed on the bottom triangular frame (1), and the self-tightening unit is signal connected to the controller.

9. A high-precision ball-spinning tripod for billiards according to claim 8, characterized in that: The thin rod body (61) and the thick rod head (62) are eccentrically arranged. A monitoring groove (601) is chiseled at the lower end of the thick rod head (62). The internal laser rangefinder (71) is installed at the top of the monitoring groove (601). A transparent sealing plate (72) is fixedly embedded at the lower opening of the monitoring groove (601).

10. A high-precision ball-spinning tripod for billiards according to claim 9, characterized in that: When the thick rod head (62) contacts the top triangular frame (2), the guide side plate (53) and the guide groove (101) are completely separated. When in use, the electromagnetic plate (73) is energized, and the thick rod head (62) and the guide side plate (53) are in a fixed plug-in state. When the distance between the top triangular frame (2) and the thick rod head (62) reaches the height of the overlapping part of the thick rod head (62) and the guide side plate (53), the electromagnetic plate (73) is de-energized.

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