Billiard table and its stone slab connector

Abstract

The present invention discloses a billiard table and its stone slab connector. The billiard table includes an oval nut and a positioning sleeve. The oval nut has an oval structure and is provided with a threaded hole. The positioning sleeve has an arc-shaped groove for receiving the oval nut, and its outer surface is provided with a tapered step extending along its circumferential direction. The oval nut fits snugly into the arc-shaped groove and forms an oval columnar structure together with the positioning sleeve. The oval nut of this stone slab connector is fitted into the positioning sleeve to form an oval columnar structure, and the outer surface of the positioning sleeve is provided with a tapered step, allowing for quick and accurate positioning and installation, greatly improving efficiency and positioning accuracy. This avoids the problems of the traditional round nut rotating, which causes the stone slab to be crushed and break, greatly improving the clamping force and improving the performance of the billiard table.

Description

[Technical Field]

[0001] The present invention relates to the technical field of billiards, and more particularly to a billiard table and its slab connector. [Background technology]

[0002] To attach the cushion to a conventional billiard table, the user first places the cushion on the side edge of the slab, leans against it, and then, with his or her left hand, feels around to insert the round nut into the nut hole in the slab. Then, with his or her right hand, feels around to insert the bolt through the cushion, connect it, and tighten it. This process is time-consuming and laborious, as it requires no visual inspection. After installing the first bolt, there's no need to lean against the slab, and there's no risk of the cushion falling off. Simply squat down and tighten the remaining four bolts. However, because the nut holes in the slab are blind holes that face downward, tightening is almost completely blind, and the gap between the nut and the nut hole is very small. Therefore, the user must hold the underside of the nut with the fingertips of their left hand and rotate it to match the bolt in their right hand. This installation process is extremely laborious and requires a great deal of patience.

[0003] The above installation method increases the amount of work required on-site. Therefore, in recent years, nuts have been installed in advance at a nut factory. As shown in Figures 1, 2, 3, and 4, the round nut 3 on the stone slab 1 is fixed and installed in the nut hole 6 of the stone slab 1 through the following steps:

[0004] 1. Place the front of the stone slab 1 facing downward and the other side facing upward to expose the nut hole 6. 2. Insert the screw center line of the round nut 3 into the nut hole 6 of the stone slab 1 perpendicular to the edge of the stone slab 1; 3. Pass the bolt 2 through the pre-assembled steel formwork hole to ensure the center of the installation and connect it to the round nut 3 on the stone slab 1. 4. Tighten all the bolts 2 and round nuts 3 on the stone slab 1 in order. 5. The prepared marble adhesive 5 is filled into the gap in the nut hole 6, and the thin iron wire is vibrated up and down and left and right to fill the gap with the marble adhesive 5. 6. After the marble adhesive 5 has hardened, loosen all the bolts 2 and remove the steel formwork 4 to complete the installation.

[0005] The drawbacks of such an installation method are as follows: 1. It needs to be positioned with the pre-assembled steel formwork hole 4. If the center line of the nut 3 on the stone slab 1 does not coincide with the center line of the nut hole 6, the resulting error reduces the positional accuracy of the nut 3, making it difficult to screw in the bolt and install the base rim 7. A large error makes it difficult to install the base rim 7, and the wooden hole for the handrail must be widened on-site. Widening the hole with the secondary cutting edge of a drill is time-consuming, and widening the hole with a milling cutter is likely to disrupt the hole and result in it being wasted. Therefore, a preliminary steel formwork is used to temporarily replace the function of the cushion rim, and the nut 3, nut hole 6, and preliminary steel formwork hole are made concentric. 2. Installation is time-consuming and laborious. Marble adhesive 5 is a two-component adhesive that is relatively viscous, so a hardener must be added when it is used. If too much hardener is added, the adhesive will harden and become less fluid, making it difficult to fill the gap between round nut 3 and stone slab 1. This also increases the amount of work required to vibrate the adhesive up and down with the iron wire. Adding a small amount of hardener also requires a long hardening time. 3. The round nut 3 rotates and breaks through the stone slab 1. The worker may not be vibrating enough due to a lack of responsibility, or may have used too much hardener, resulting in poor fluidity and the marble adhesive 5 not being able to completely fill the voids, causing it to expand. When the tightening force is too strong, the frictional force causes the round nut 3 to rotate to the right, causing it to rise to the left and break through the surface of the stone slab 1. 4. The contact area is small, making the stone slab 1 prone to crushing. In this type of mounting structure, only the small areas of the upper and lower edges of the nut hole 6 of the round nut 3 come into contact with the stone slab 1, limiting the contact force. If the screw is tightened with inappropriate force, the base edge 7 will not be tight enough and the ball will hit it with too much force, causing vibration, a feeling of incompleteness or weakness, and increased noise. Over time, the nut will loosen, reducing the performance of the billiard table. 5. When the marble adhesive 5 is injected, it easily flows into the stone plate hole, filling the thread surface of the bolt 2 and the stone plate hole. After hardening, when the bolt 2 is screwed in, a female thread of the marble adhesive is formed. However, when installing the base 7, when the new bolt 2 passes through the female thread, the marble adhesive adheres to the surface of the male thread of the bolt 2, and when it is screwed into the nut 3 before, the female thread of the nut also adheres to the marble adhesive. The viscosity of the marble adhesive increases the frictional force of the screw rotation, making the bolt 2 and nut 3 more likely to wear out. Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above circumstances, the present invention provides a billiard table and its stone slab connector, in which the oval nut of this stone slab connector is fitted into the positioning sleeve to form an oval columnar structure, the outer surface of the positioning sleeve is provided with a tapered step, and the bottom is provided with a tapered bottom, which allows for quick and accurate positioning and installation, greatly improving efficiency and positioning accuracy, avoiding the problems of the traditional round nut rotating, which causes the stone slab to be crushed and break, and greatly improving the clamping force, thereby improving the performance of the billiard table. [Means for solving the problem]

[0007] The present invention employs the following technical means.

[0008] According to the present invention, there is provided a slate connector for a billiard table, comprising an oblong nut and a positioning sleeve, The oval nut has an oval structure and is provided with a threaded hole therethrough; The positioning sleeve is provided with an arcuate groove for receiving the oval nut, and has an outer surface with a tapered step extending along the circumferential direction thereof. The shape of the oblong nut is provided to fit snugly within the arcuate groove and form an oblong cylindrical structure with the positioning sleeve.

[0009] Furthermore, the positioning sleeve is further provided with a through hole extending along the axial direction of the screw hole, and the diameter of the through hole is larger than the major diameter of the screw hole.

[0010] Furthermore, the positioning sleeve is provided with a top plate, a bottom plate, and an intermediate connection portion fixedly connected between the top plate and the bottom plate; the oval nut is mounted between the top plate and the bottom plate and closely contacts the intermediate connection portion to form an oval columnar structure; The top plate and the bottom plate are both oval plates, the oval outer size of the top plate is slightly larger than the oval nut hole of the stone plate, and the oval outer size of the bottom plate is slightly smaller at the bottom than the oval nut hole of the stone plate and is tapered; The through hole and the tapered step are both provided in the intermediate connecting portion.

[0011] Furthermore, the cross section of the intermediate connection part is C-shaped, forming the arc-shaped groove; The intermediate connection portion and the oval nut are arranged along the axial direction of the screw hole and are tightly fitted to each other.

[0012] Furthermore, the thickness of the top plate is less than the thickness of the bottom plate.

[0013] Furthermore, the center of the screw hole overlaps with the center of the oval nut in the height direction and the center of the oval nut in the width direction, Both ends of the screw hole are chamfered.

[0014] Furthermore, the positioning sleeve is provided with a plurality of tapered steps parallel to the height direction thereof.

[0015] Furthermore, the positioning sleeve is made by precision injection molding of a plastic material; The oval nut is made of a metal material, the outer surface of which is treated to be rust-proof, and the threads of which are carburized and hardened.

[0016] Furthermore, when the thickness of the bottom plate is constant, the coaxiality of the oval nut and the screw hole in the stone plate after assembly is ensured by the machining depth of the oval hole in the stone plate.

[0017] According to the present invention, there is also provided a billiard table including a stone slab, a base edge, a bolt, and any one of the stone slab connectors described above, A plurality of oblong nut holes are provided on the bottom surface of the stone slab, and bolt holes are provided on the side surface of the stone slab that correspond one-to-one to the oblong nut hole positions and communicate with each other. The base edge is provided with vias that correspond one-to-one to the positions of the bolt holes; The stone slab connector is inserted into the oval nut hole with a tight fit, and the oval nut of the stone slab connector is located on one side of the bolt hole, and the screw hole of the oval nut is opposite and communicates with the bolt hole; The screw of the bolt passes through the via, the lashing and the bolt hole in order to be connected to the threaded hole screw, thereby providing a billiard table used to fixedly connect the base rim to the stone slab.

[0018] Furthermore, the stone plate has a blind hole in the oblong nut hole on the side opposite the bolt hole for receiving the end of a screw, the blind hole being coaxial with the bolt hole. [Effects of the Invention]

[0019] Beneficial effects 1. When used to connect the stone slabs and base edges of billiard tables, the self-aligning oval column structure of the stone slab connector eliminates the need for pre-assembly using steel formwork and the process of injecting marble adhesive, significantly reducing the time and effort required for pre-assembly. It takes a single worker 15-20 minutes to inject the 30 nuts required for one set of stone slabs. Therefore, installing one nut takes 30-40 seconds. In contrast, it takes only 3 seconds to hammer in one oval nut with a hand hammer. Furthermore, because there are no nuts or bolts involved, there is no risk of misalignment due to assembly clearance, resulting in high positioning accuracy and improved installation accuracy for the table edge.

[0020] 2. The installation is strong, preventing the problem of the stone slab being torn apart by the rotation of a conventional round nut. When the oval nut, which has a hard plastic locating sleeve on its outer layer, is hammered into the oval nut hole in the stone slab, the tapered locating sleeve is compressed, and the tapered design makes installation easy; simply tap it down with a hand hammer. Furthermore, the compressed hard plastic tapered step creates a relatively large interference between the oval nut and the oval nut hole in the stone slab, firmly securing the oval nut in the oval nut hole in the stone slab and preventing it from rotating at all, eliminating the problem of the stone slab being torn apart.

[0021] 3. The phenomenon of crushing of the stone slab joints is avoided, saving precious stone materials. The oval nut has a larger contact area with the stone slab because it changes from conventional line contact to surface contact. Even though the arc contact surfaces on both ends have been eliminated, the oval nut still has a contact area that is about 40 times larger than that of conventional round nuts, which reduces the pressure at the contact points and prevents the stone slab from being crushed and discarded. The smaller pressure also extends the service life of the stone slab, saving a large amount of valuable stone.

[0022] 4. Improve the performance of your billiard table. The large contact area and small pressure result in a significant increase in clamping force, a stronger connection of the rim, less noise when hitting the ball, a more powerful sound, and the rim that is less likely to loosen, which greatly improves the competitive and entertainment value of the billiard table and promotes the development of billiards. [Brief explanation of the drawings]

[0023] [Figure 1] This is a structural schematic diagram of a round nut attached to a stone slab in the prior art. [Figure 2] FIG. 2 is a plan view of FIG. [Figure 3] FIG. 2 is a cross-sectional view taken along the line AA in FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along the line BB in FIG. [Figure 5] FIG. 2 is a front view of the stone slab connector of the present invention. [Figure 6] FIG. 6 is a structural schematic diagram of the CC cross section of the stone slab connector in FIG. 5. [Figure 7] FIG. 6 is a structural schematic diagram of the DD cross section of the stone slab connector in FIG. 5. [Figure 8] 1 is a schematic diagram of the mounting structure between the stone plate and the base edge of the billiard table of the present invention; [Figure 9] 9 is a schematic diagram of the E-E cross section of the mounting structure in FIG. 8. [Figure 10] FIG. 9 is a schematic diagram of the hole structure of the stone slab in FIG. 8. [Figure 11] This is a structural schematic diagram comparing the contact areas of a round nut and an oval nut. [Figure 12] FIG. 6 is a schematic diagram of the three-dimensional structure of the positioning sleeve of the stone slab connector in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following provides a clear and complete description of the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. It is clear that the following embodiments are only some of the embodiments of the present invention, and are not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are all included in the scope of protection of the present invention.

[0025] Example 1 This embodiment provides a stone slab connector for use in billiard tables. This stone slab connector is used in billiard tables and securely connects the base edge 7 to the side edge of the stone slab 1 that forms the table surface. Figure 5 shows a structural schematic diagram of the stone slab connector. Figure 6 shows a cross-sectional structural schematic diagram of the stone slab connector. Figure 7 shows a longitudinal cross-sectional structural schematic diagram of the stone slab connector.

[0026] The stone slab connector includes an oval nut 9 and a positioning sleeve 8. As shown in FIGS. 6 and 7, the oval nut 9 has an oval structure and is provided with a screw hole 11 extending therethrough. As shown in FIGS. 7, 8, and 9, the oval nut 9 is provided with a screw hole 11 extending therethrough in the horizontal direction. The horizontal direction of the oval nut 9 coincides with the axial direction of the screw hole 11 and coincides with the arrangement direction of the base rim 7 and the stone slab 1. As shown in FIG. 5, the center of the screw hole 11 coincides with the center of the height and width of the oval nut 9. The height direction is the up-down direction in FIG. 5, and the width direction is the left-right direction in FIG. 5. When the stone slab connector is installed in the oval nut hole 18 of the stone slab 1, the height direction of the oval nut 9 coincides with the thickness direction of the stone slab 1, and the width direction coincides with the length or width direction of the stone slab 1. That is, when the oval nut 9 is attached to the long side of the stone slab 1, the width direction of the oval nut 9 is the same as the length direction of the stone slab 1, and when the oval nut 9 is attached to the short side of the stone slab 1, the width direction of the oval nut 9 is the same as the width direction of the stone slab 1. The screw hole 11 is located at the geometric center of the oval nut 9 in the height and width directions, so that the force received by the contact surface between the oval nut 9 and the stone slab 1 is uniform and stress concentration is further reduced. Both ends of the screw hole 11 are provided with chamfers 12. As shown in Figure 5, the chamfers 12 at both ends of the screw hole 11 make it easy to insert the screw end during assembly.

[0027] The positioning sleeve 8 has an arc-shaped groove for receiving the oval nut 9, and its outer surface has a tapered step 13 extending along its circumferential direction. The positioning sleeve 8 is further provided with a through hole 14 extending along the axial direction of the screw hole 11. The diameter of the through hole 14 is larger than the major diameter of the screw hole 11. As shown in Figures 5, 7, and 12, the outer surface of the positioning sleeve is provided with multiple tapered steps 13 extending along its circumferential direction. The multiple tapered steps 13 may be arranged parallel to each other along the height direction on the outer surface of the positioning sleeve 8. After the stone slab connector is attached to the oval nut hole 18 of the stone slab 1, the tapered steps 13 prevent the stone slab connector from slipping out or falling off the oval nut hole 18. The positioning sleeve 8 is further provided with a through hole 14 extending along the axial direction of the screw hole 11, corresponding to and communicating with the screw hole 11. The through hole 14 provided in the positioning sleeve 8 allows the screw end of the bolt 2 to pass through, ensuring the threaded connection length between the bolt 2 and the oval nut 9 and forming a reliable connection between the stone slab 1 and the base rim 7.

[0028] The shape of the oval nut 9 is adapted to fit within the arcuate groove of the positioning sleeve 8 and together with the positioning sleeve 8 form an oval cylindrical structure.

[0029] The stone slab connector is provided with an oval nut 9 with a screw hole 11, and also with a positioning sleeve 8 for fitting the oval nut 9. The oval nut 9 and the positioning sleeve 8 form an oval columnar structure. A tapered step 13 is provided on the outer surface of the positioning sleeve 8. Because the tapered step 13 is tapered, the bottom is relatively small and the top is relatively large. As a result, when the stone slab connector consisting of the positioning sleeve 8 and the oval nut 9 is tightly fitted into the oval nut hole 18 of the stone slab 1, the smaller side of the tapered step 13 enters the oval nut hole 18 first, and then the larger side enters the oval nut hole 18, making it difficult to install the stone slab connector and preventing the stone slab connector from slipping out of the oval nut hole 18. The tapered step 13 abuts against the inner wall of the oval nut hole 18 to create a tightening margin, preventing the stone slab connector from slipping out of the oval nut hole 18, and the positioning sleeve 8 achieves a slip-out prevention function. This improves the stability and reliability of the attachment of the stone slab connector to the stone slab 1.

[0030] The precisely manufactured oval nut 9 and the precisely injection-molded locating sleeve 8 are mated to form a precision oval stone slab connector slightly larger than the oval nut hole 18 in the stone slab 1. After the connector is hammered into the oval nut hole 18 in the stone slab 1, the bottom of the connector contacts the bottom of the oval nut hole 18 in the stone slab and compacts. This eliminates the connector's rotational degrees of freedom in the X axis, the Y axis, and the Z axis. The oval shape of the connector eliminates the rotational degrees of freedom in the Z axis. The interference fit between the connector and the oval nut hole 18 in the stone slab brings the long sides of the two into close contact, eliminating the stone slab connector's degrees of freedom of movement in the X axis and the Y axis. This assembly eliminates six degrees of freedom in the stone slab connector, effectively satisfying the six-point positioning principle and realizing the self-alignment function of the stone slab connector. The X axis may be the length or width direction of the billiard table, in which case the Y axis is the width or length direction of the billiard table, and the Z axis is the height direction of the billiard table.

[0031] In a specific embodiment, as shown in FIG. 7 , the positioning sleeve 8 is provided with a top plate 15, a bottom plate 16, and an intermediate connection portion 17 fixedly connected between the top plate 15 and the bottom plate 16. The oval nut 9 is attached between the top plate 15, the bottom plate 16, and the intermediate connection portion 17 and is in close contact with the intermediate connection portion 17 to form an oval columnar structure. The top plate 15 and the bottom plate 16 are both oval plates. The oval outer size of the top plate 15 is slightly larger than the oval nut hole 18 in the stone slab 1. The oval outer size of the bottom plate 16 is slightly smaller at its bottom than the oval nut hole 18 in the stone slab 1 and is tapered. The through hole 14 and the tapered step 13 are both provided in the intermediate connection portion 17. The top surface of the oval nut 9 is in close contact with the top plate 15, the bottom surface is in close contact with the bottom plate 16, and one side surface is in close contact with the intermediate connection portion 17. The thickness of the top plate 15 may be less than, the same as, or greater than the thickness of the bottom plate 16. The positioning sleeve 8 may be made by precision injection molding of plastic material. The oval nut 9 is made of a metal material such as copper, steel, iron, or aluminum. The surface of the oval nut 9 is treated to prevent rust, and the female thread of the oval nut 9 is carburized and quenched to improve the wear resistance of the female thread of the oval nut 9, which greatly extends the service life of the oval nut 9 and, therefore, the service life of the stone plate 1.

[0032] The top plate 15, bottom plate 16, and intermediate connector 17 of the positioning sleeve 8 are injection molded as a single unit. When the stone slab connector is attached to the oblong nut hole 18 in the stone slab 1, the plastic positioning sleeve 8 fits into the bottom of the oblong nut hole 18. The thickness of the hole bottom may be constant, which is ensured by machining the depth size of the stone slab hole. The center line of the oblong nut of the stone slab connector overlaps with the center line of the bolt hole 19.

[0033] As shown in Figures 5 and 6, the oval nut 9 and the positioning sleeve 8 form an oval columnar structure. The intermediate connection part 17 and the oval nut 9 are aligned along the axial direction of the screw hole 11 and are tightly fitted together. The cross-sectional shape of the intermediate connection part 17 is C-shaped, forming an arc-shaped groove into which the oval nut 9 is fitted. The cross-sectional shape of the oval nut 9 is oval (also called a track shape), including flat surfaces on both sides and arc-shaped surfaces connecting the flat surfaces at both ends. The outer circumferential surface of the oval nut 9 fits the shape of the arc-shaped groove, so that when the oval nut 9 is fitted into the positioning sleeve 8, the oval nut 9 is tightly fitted into the arc-shaped groove of the positioning sleeve 8 via the outer circumferential flat surface and the arc-shaped surface. As shown in Figure 6, the stone slab connector has an oval cylindrical structure, and the positioning sleeve 8 covers the outside of the oval nut 9 so as to semi-enclose it, that is, the top, bottom and part of the outer periphery of the oval nut 9 are all covered by the positioning sleeve 8, so that the oval nut 9 is semi-enclosed by the positioning sleeve 8.

[0034] When used to connect the stone slab 1 and the base rim 7 of a billiard table, the self-aligning oval column structure eliminates the need for pre-assembly using steel formwork and the process of injecting marble adhesive, significantly reducing the time and effort required for pre-assembly. Calculations show a savings of more than 10 times the labor time and effort. In conventional technology, it takes a single worker 15 to 20 minutes to inject the 30 nuts required for one set of stone slabs. Therefore, installing one nut takes 30 to 40 seconds. In contrast, it takes only 3 seconds to hammer in one oval nut 9 with a hand hammer. Furthermore, because there are no nuts or bolts involved, there is no risk of misalignment due to assembly clearance, resulting in high positioning accuracy and improved installation accuracy for the table edge.

[0035] The stone slab connector provides a secure installation and prevents the stone slab 1 from being torn apart by the nut's rotation. When the oval nut 9, which is covered with a hard plastic locating sleeve 8 on its outer layer, is hammered into the oval nut hole 18 in the stone slab 1, the locating sleeve 8, which has a tapered step 13, is compressed. The tapered design makes installation easy; simply tap it down with a hand hammer. Furthermore, the compressed hard plastic tapered step 13 creates a certain amount of interference between the oval nut 9 and the oval nut hole 18 in the stone slab 1. This firmly secures the oval nut 9 in the oval nut hole 18 in the stone slab 1 and prevents it from rotating at all, preventing the stone slab base from being torn apart.

[0036] By using the stone slab connector, the phenomenon of crushing the connection point between the stone slab 1 and the base edge can be avoided, and precious stone can be saved. As shown in Figure 11, the contact position 10 and contact area between the conventional round nut 3 and the oval nut 9 of the present invention and the stone slab 1 are compared. The conventional round nut 3 makes line contact with the stone slab 1, and the contact position 10 is only two lines on both the top and bottom sides of the screw hole, and the actual contact area is about 10mm. 2 In contrast, the oval nut 9 of the present invention makes surface contact with the stone plate 1, and the contact position 10 includes not only the flat surface but also the arc-shaped surfaces at both ends of the flat surface. The actual contact area between the oval nut 9 of the present invention and the stone plate 1 is approximately 410 mm when calculated as a flat surface. 2 The actual contact area of ​​the oval nut 9 of the present invention is more than 40 times larger than that of the conventional round nut 3, even though the arc surface has been eliminated. The oval nut 9 changes from the conventional line contact to a surface contact, thereby increasing the contact area with the stone slab 1. Compared to the conventional round nut, the oval nut 9 increases the contact area by approximately 40 times, reducing the pressure at the contact point and preventing the stone slab from being crushed and discarded. The reduced pressure also extends the service life of the stone slab, saving a large amount of valuable stone.

[0037] The use of this stone slab connector improves the performance of billiard tables. The large contact area and low pressure between the oval nut 9 and the stone slab 1 greatly improves the clamping force, making the connection between the base rim stronger, reducing noise when hitting the ball and producing a powerful sound, and preventing the base rim from loosening. This greatly improves the competitive and entertainment aspects of billiard tables and promotes the development of billiards.

[0038] Example 2 This embodiment provides a billiard table. This billiard table includes a stone slab 1, a base 7, bolts 2, a clasp 22, and the stone slab connector provided in the previous embodiment. As shown in FIG. 10 , a plurality of oblong nut holes 18 are provided on the bottom surface of the stone slab 1. Bolt holes 19 are provided on the side of the stone slab 1, corresponding one-to-one to the positions of the oblong nut holes 18 and communicating with them. A blind hole 20 is further provided on the opposite side of the oblong nut holes 18, facing the position of the bolt holes 19 and coaxial with the position of the bolt holes 19. The blind hole 20 can accommodate the screw end of the bolt 2. The oblong nut hole 18 is an oblong hole. The oblong nut hole 18 matches the shape of the stone slab connector. A stone slab connector having an oblong cylindrical structure is fitted into the oblong nut hole 18. As shown in Figures 8 and 9, vias 21 are provided in the base rim 7, corresponding one-to-one to the bolt holes 19. The stone slab connector is inserted into the oval nut hole 18 with a tight fit. The oval nut 9 of the stone slab connector is located on one side of the bolt hole 19, and the threaded hole 11 of the oval nut 9 is provided opposite and communicates with the bolt hole 19. The screw end of the bolt 2 passes through the via 21, the flax 22, and the bolt hole 19 in order and is threadedly connected to the threaded hole 11, which is used to securely attach the base rim 7 to the stone slab 1 and to clamp the flax 22 between the base rim 7 and the stone slab 1. By using a bolt 2 with a tapered end, the tapered end easily pierces the flax 22, avoiding the process of forming a cut in the flax 22, which would not be possible with a flat screw.

[0039] Using a billiard table with the above mounting structure, the entire stone slab connector is installed in the oval nut hole 18 of the stone slab 1, and one end of the screw of the bolt 2 passes through the via 21 in the base rim 7, the clasp 22, and the bolt hole 19 in the stone slab 1, before connecting with the threaded hole 11 of the oval nut 9, tightening the base rim 7 and connecting it securely to the stone slab 1. The oval nut 9 and the oval nut hole 18 are engaged with each other via flat and smooth curved surfaces, which avoids stress concentration and prevents the oval nut hole 18 in the stone slab 1 from bursting due to stress concentration. This improves the connection strength while preventing the stone slab 1 from collapsing, saving a large amount of valuable stone. The oval nut hole 18 and the stone slab connector both have an oval structure, which achieves self-alignment between the stone slab connector and the stone slab 1, prevents the oval nut 9 from rotating, and prevents the base surface of the stone slab 1 from being torn apart by the rotation of the oval nut 9. The screw hole 11 and the bolt hole 19 are automatically aligned, allowing the bolt 2 to quickly screw into the screw hole 11, improving the connection speed between the bolt 2 and the oval nut 9, shortening the assembly time and improving the installation efficiency of the billiard table.

[0040] In addition, since the positioning sleeve 8 is provided with a tapered step 13 on the outside, after the positioning sleeve 8 is attached to the oval nut hole 18, the tapered step 13 and the oval nut hole 18 of the stone slab 1 form an interference fit, preventing the stone slab connector from slipping out or falling off from the oval nut hole 18. This allows the positioning sleeve 8 and the oval nut 9 to be securely fitted into the oval nut hole 18 of the stone slab 1, which is advantageous in improving the reliability and stability of the connection, facilitating subsequent attachment and detachment of the base rim 7, and preventing the stone slab connector from being lost during the attachment and detachment process.

[0041] A blind hole 20 for accommodating the end of a screw is provided on the side of the oblong nut hole 18 in the stone slab 1 opposite the bolt hole 19. The blind hole 20 is coaxial with and communicates with the threaded hole 11 and the bolt hole 19. When the base 7 is fixed to the stone slab 1 with a bolt 2, the screw end of the bolt 2 that is threadedly connected to the threaded hole 11 of the oblong nut 9 is inserted into the blind hole 20, thereby ensuring a sufficient connection between the bolt 2 and the threaded hole 11 while increasing the freedom of selection of the length of the bolt 2.

[0042] The above is only a preferred embodiment of the present invention, and does not limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the scope of protection of the present invention.

[0043] (Addendum) (Appendix 1) A billiard table slate connector including an oblong nut and a positioning sleeve, The oval nut has an oval structure and is provided with a threaded hole therethrough; The positioning sleeve is provided with an arcuate groove for receiving the oval nut, and has an outer surface with a tapered step extending along the circumferential direction thereof. The shape of the oval nut is adapted to fit within the arcuate groove and form an oval columnar structure together with the positioning sleeve.

[0044] (Appendix 2) The stone plate connector described in Appendix 1, characterized in that the positioning sleeve further has a through hole extending along the axial direction of the screw hole, and the diameter of the through hole is larger than the major diameter of the screw hole.

[0045] (Appendix 3) the positioning sleeve has a top plate, a bottom plate, and an intermediate connection portion fixedly connected between the top plate and the bottom plate; the oval nut is mounted between the top plate and the bottom plate and closely contacts the intermediate connection portion to form an oval columnar structure; The top plate and the bottom plate are both oval plates, The stone slab connector described in Appendix 2, characterized in that the through hole and the tapered step are both provided in the intermediate connection portion.

[0046] (Appendix 4) The cross section of the intermediate connection part has a C-shape, forming the arc-shaped groove; The stone slab connector described in Appendix 3, characterized in that it is arranged along the axial direction of the screw hole and tightly attached between the intermediate connection part and the oval nut.

[0047] (Appendix 5) The stone slab connector described in Appendix 3, characterized in that the thickness of the top plate is smaller than the thickness of the bottom plate.

[0048] (Appendix 6) The center of the screw hole coincides with the center of the oval nut in the height direction and the center of the oval nut in the width direction, A stone slab connector according to any one of claims 1 to 5, characterized in that both ends of the screw hole are chamfered.

[0049] (Appendix 7) The stone slab connector described in Appendix 6, characterized in that the positioning sleeve has a plurality of tapered steps parallel to its height direction.

[0050] (Appendix 8) the positioning sleeve is precision injection molded from a plastic material; The stone slab connector described in Appendix 6, characterized in that the oblong nut is made of a metal material, the outer surface is treated to be rust-proof, and the thread is carburized and hardened.

[0051] (Appendix 9) A billiard table comprising a slab, a base rim, a bolt, and a slab connector according to any one of claims 1 to 8, A plurality of oblong nut holes are provided on the bottom surface of the stone slab, and bolt holes are provided on the side surface of the stone slab that correspond one-to-one to the oblong nut hole positions and communicate with each other. The base edge is provided with vias that correspond one-to-one to the positions of the bolt holes; The stone slab connector is inserted into the oval nut hole with a tight fit, and the oval nut of the stone slab connector is located on one side of the bolt hole, and the screw hole of the oval nut is opposite and communicates with the bolt hole; The screw of the bolt passes through the via, the lashing and the bolt hole in order to be connected to the threaded hole screw, and is used to fixedly connect the base edge to the stone plate.

[0052] (Appendix 10) 10. The billiard table according to claim 9, wherein the stone plate has a blind hole for accommodating an end of a screw on the side of the oblong nut hole opposite the bolt hole, the blind hole being coaxial with the bolt hole. [Explanation of symbols]

[0053] 1 - stone slab, 2 - bolt, 3 - round nut, 4 - steel formwork, 5 - marble adhesive, 6 - nut hole, 7 - base edge, 8 - locating sleeve, 9 - oblong nut, 10 - contact point, 11 - threaded hole, 12 - chamfer, 13 - tapered step, 14 - through hole, 15 - top plate, 16 - bottom plate, 17 - intermediate connection, 18 - oblong nut hole, 19 - bolt drilling hole, 20 - blind hole, 21 - via, 22 - lashing

Claims

1. A billiard table slate connector including an oblong nut and a positioning sleeve, The oval nut has an oval structure and is provided with a threaded hole therethrough; The positioning sleeve is provided with an arcuate groove for receiving the oval nut, and has an outer surface with a tapered step extending along the circumferential direction thereof. The shape of the oval nut is adapted to fit within the arcuate groove and form an oval columnar structure together with the positioning sleeve.

2. The stone slab connector according to claim 1, characterized in that the positioning sleeve is further provided with a through hole extending along the axial direction of the screw hole, and the diameter of the through hole is larger than the major diameter of the screw hole.

3. the positioning sleeve has a top plate, a bottom plate, and an intermediate connection portion fixedly connected between the top plate and the bottom plate; the oval nut is mounted between the top plate and the bottom plate and closely contacts the intermediate connection portion to form an oval columnar structure; The top plate and the bottom plate are both oval plates, The stone slab connector according to claim 2, wherein the through hole and the tapered step are both provided in the intermediate connection part.

4. The cross section of the intermediate connection portion has a C-shape, forming the arc-shaped groove; The stone slab connector according to claim 3, characterized in that it is arranged along the axial direction of the screw hole between the intermediate connector and the oval nut and is in close contact with the screw hole.

5. The stone slab connector according to claim 3, wherein the thickness of the top plate is smaller than the thickness of the bottom plate.

6. The center of the screw hole coincides with the center of the oval nut in the height direction and the center of the oval nut in the width direction, The stone slab connector according to any one of claims 1 to 5, characterized in that both ends of the screw hole are chamfered.

7. The stone slab connector according to claim 6, wherein the positioning sleeve has a plurality of tapered steps parallel to each other in the height direction.

8. the positioning sleeve is precision injection molded from a plastic material; The stone slab connector according to claim 6, characterized in that the oblong nut is made of a metal material, the outer surface is treated to be anti-rust, and the thread is treated to be carburized and hardened.

9. A billiard table comprising a stone slab, a base edge, a bolt, and the stone slab connector according to any one of claims 1 to 8, A plurality of oblong nut holes are provided on the bottom surface of the stone slab, and bolt holes are provided on the side surface of the stone slab in one-to-one correspondence with the oblong nut hole positions and communicate with each other. The base edge is provided with vias that correspond one-to-one to the positions of the bolt holes; The stone slab connector is inserted into the oval nut hole with a tight fit, and the oval nut of the stone slab connector is located on one side of the bolt hole, and the screw hole of the oval nut is opposite and communicates with the bolt hole; The screw of the bolt passes through the via, the lashing and the bolt hole in order to be connected to the threaded hole screw, and is used to fixedly connect the base edge to the stone plate.

10. 10. The billiard table according to claim 9, wherein the stone plate has a blind hole for receiving an end of a screw on the side opposite the bolt hole in the oblong nut hole, and the blind hole is arranged coaxially with the bolt hole.

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