Billiard table and stone slab connector thereof

Abstract

A billiard table and a stone slab connector thereof. The stone slab connector comprises an oblong nut (9) and a positioning sleeve (8), wherein the oblong nut (9) has an oblong structure, and is provided with a through threaded hole (11); the positioning sleeve (8) is provided with an arc-shaped groove for accommodating the oblong nut (9), and barbs (13) extending in a circumferential direction of the positioning sleeve (8) are arranged on an outer side face of the positioning sleeve (8); and the oblong nut (9) is integrally fitted and embedded into the arc-shaped groove, and forms an oblong column structure with the positioning sleeve (8). The stone slab connector can rapidly carry out precise positioning and mounting, thereby greatly improving the working efficiency and positioning precision, eliminating the phenomena of existing round nuts (3) rotating to burst the top of a stone slab (1) and the stone slab (1) being easily crushed, and greatly improving the tightening force and the performance of a billiard table.

Description

Billiard table and stone slab connecting piece thereof Technical Field

[0001] The present invention relates to the technical field of billiards, in particular to a billiard table and a stone slab connector thereof. Background Art

[0002] The earliest method of installing the edge of a pool table (also called the rim) was to first place the edge on the side of the slate, then lean against it with your body, and then use your left hand to feel the round nut into the nut hole in the slate, and use your right hand to feel the bolt through the edge and tighten it. Because it is a blind screwing method, it is time-consuming and labor-intensive. After tightening the first bolt, you can squat down and tighten the other four bolts without having to lean against it or worry about the rim falling off. However, since the nut hole in the slate is a blind hole with an opening facing downward, it is basically also blind screwed. And because the gap between the round nut and the nut hole is very small, the left hand uses the fingertips to support the bottom of the round nut and rotate it to match the bolt in the right hand. The installation is very laborious and really tests one's patience.

[0003] Because the above installation method increases the amount of on-site installation, in recent years, the nut factory pre-installation method has been adopted. As shown in Figures 1, 2, 3, and 4, the round nut 3 in the stone slab 1 is installed and fixed in the nut hole 6 of the stone slab 1 according to the following steps:

[0004] 1. Place the stone slab 1 with the front side facing down and the back side facing up, exposing the nut hole 6;

[0005] 2. Place the thread centerline of the round nut 3 into the nut hole 6 of the stone slab 1 perpendicular to the edge of the stone slab 1;

[0006] 3. Pass the bolt 2 through the pre-installed steel template hole to ensure the installation is centered, and connect it with the round nut 3 in the stone slab 1;

[0007] 4. Tighten all bolts 2 and round nuts 3 on the stone slab 1 in sequence;

[0008] 5. Fill the gap in the nut hole 6 with the prepared marble glue 5, and use a thin wire to vibrate up and down and left and right to make the marble glue 5 fill the gap;

[0009] 6. After the marble glue 5 solidifies, loosen all bolts 2, remove the steel formwork 4, and the installation is completed.

[0010] Disadvantages of this installation method:

[0011] 1. Steel template 4 needs to be pre-installed for positioning.

[0012] If the centerline of the round nut 3 in the stone slab 1 does not coincide with the centerline of the nut hole 6, the resulting error will reduce the positioning accuracy of the round nut 3, making it difficult to screw the bolt in, and increasing the difficulty of installing the table edge 7. A large error can easily prevent the table edge 7 from being pressed in, requiring on-site reaming of the handrail's wooden hole. Reaming with the secondary cutting edge of a drill bit is laborious, and using a milling cutter can easily cause the hole to be misaligned, resulting in a waste hole. Therefore, a pre-assembled steel template is used to temporarily replace the storage edge, ensuring that the round nut 3, nut hole 6, and the pre-assembled steel template hole are concentric.

[0013] 2. Installation is labor-intensive and time-consuming.

[0014] Since the marble glue 5 is a two-component and relatively viscous one, a curing agent must be added as it is used. Too much curing agent will cause the glue to cure quickly and have poor fluidity, which will prevent the marble glue 5 from fully filling the gap between the round nut 3 and the stone slab 1 and increase the workload when vibrating the glue up and down with the wire. If too little curing agent is added, the curing time will be long.

[0015] 3. The round nut 3 rotates and breaks the stone slab 1.

[0016] Due to the lack of responsibility of the workers, insufficient vibration, or excessive addition of curing agent with poor fluidity, the marble glue 5 does not fully fill the gaps, sometimes resulting in bulging. In this way, when the tightening force is slightly greater, the friction force causes the round nut 3 to rotate to the right, causing the left side of the round nut 3 to rise and break the surface of the stone slab 1.

[0017] 4. The contact area is small and the stone slab 1 is easily crushed.

[0018] In this mounting structure, only the upper and lower edges of the nut hole 6 of the round nut 3 contact the stone slab 1. As the contact force is limited, people are afraid to tighten the screw too hard, resulting in the table edge 7 not being tightened tightly. When the billiard ball hits the table hard, it will cause vibration, a sense of looseness or loss of force, and increase noise. Over time, the table will become loose, reducing the performance of the billiard table.

[0019] 5. When pouring marble glue 5, it easily flows through the pores of the slate, filling the threaded surface of bolt 2 and the slate hole. After hardening, when the bolt 2 is screwed out, a section of marble glue internal thread is formed. However, when installing the table edge 7, the new bolt 2 passes through this section of marble glue internal thread, and the marble glue adheres to the outer thread surface of the bolt 2. It is then screwed forward into the nut 3, and the inner thread of the nut is also adhered to marble glue. The viscosity of the marble glue increases the friction of the thread rotation, causing the bolt 2 and nut 3 to wear easily.

[0020] Summary of the Invention

[0021] In view of this, the present invention provides a billiard table and a stone slab connecting piece thereof, wherein the oblong nut of the stone slab connecting piece is embedded in a positioning sleeve to form an oblong cylindrical structure, and barbs are provided on the outer side of the positioning sleeve, and a taper is provided on the bottom, which can quickly and accurately position and install, greatly improve work efficiency and positioning accuracy, eliminate the phenomenon that the stone slab table top is broken and the stone slab is easily crushed when the existing round nut is rotated, and greatly increase the tightening force, thereby improving the performance of the billiard table.

[0022] The present invention adopts the following specific technical solutions:

[0023] The present invention provides a stone slab connector for a billiard table, the stone slab connector comprising an oblong nut and a positioning sleeve, wherein:

[0024] The oblong nut is an oblong structure and is provided with a threaded hole running through it;

[0025] The positioning sleeve is provided with an arc-shaped groove for accommodating the oblong nut, and is provided with barbs extending along its circumference on its outer side surface;

[0026] The oblong nut is embedded in the arc-shaped groove in a shape-matched manner and forms an oblong columnar structure with the positioning sleeve.

[0027] Furthermore, the positioning sleeve is further provided with a through hole extending along the axial direction of the threaded hole, and the diameter of the through hole is larger than the major diameter of the threaded hole.

[0028] Furthermore, the positioning sleeve is provided with a top plate, a bottom plate, and an intermediate connecting portion fixedly connected between the top plate and the bottom plate;

[0029] The oblong nut is installed between the top plate and the bottom plate, and fits with the middle connecting portion to form an oblong cylindrical structure;

[0030] The top plate and the bottom plate are both oblong plates; the oblong outer dimensions of the top plate are slightly larger than the oblong nut hole of the stone slab; the bottom of the oblong outer dimensions of the bottom plate is slightly smaller than the oblong nut hole of the stone slab and has a taper;

[0031] The through hole and the barb are both arranged on the middle connecting portion.

[0032] Furthermore, the cross-section of the intermediate connecting portion is C-shaped and forms the arc-shaped groove;

[0033] The intermediate connecting portion and the oblong nut are arranged and fitted together along the axial direction of the threaded hole.

[0034] Furthermore, the thickness of the top plate is smaller than the thickness of the bottom plate.

[0035] Furthermore, the center of the threaded hole coincides with the center of the oblong nut in the height direction and the center of the oblong nut in the width direction;

[0036] Chamfers are provided at both ends of the threaded hole.

[0037] Furthermore, the positioning sleeve is provided with a plurality of parallel barbs along its height direction.

[0038] Furthermore, the positioning sleeve is made of precision injection molding of plastic material;

[0039] The oblong nut is made of metal material, the outer surface is subjected to rust-proof treatment, and the thread is subjected to carburizing and quenching treatment.

[0040] Furthermore, when the thickness of the bottom plate is constant, the coaxiality of the oblong nut and the screw hole of the stone plate after assembly is ensured by the depth of the oblong hole processed in the stone plate.

[0041] In addition, the present invention also provides a billiard table, which includes a stone slab, a table edge, bolts, and any one of the stone slab connectors provided by the above technical solution;

[0042] The bottom surface of the stone slab is provided with a plurality of oblong nut holes, and the side surface of the stone slab is provided with bolt through holes corresponding to the positions of the oblong nut holes one by one;

[0043] The platform edge is provided with through holes corresponding to the bolt penetration positions one by one;

[0044] The stone slab connector is inserted into the oblong nut hole with an interference fit, the oblong nut of the stone slab connector is located on one side of the bolt through-hole, and the threaded hole of the oblong nut is relatively connected to the bolt through-hole;

[0045] The screw rod of the bolt passes through the through hole, the table cloth and the bolt through hole in sequence and is threadedly connected with the threaded hole to fix the table edge on the stone slab.

[0046] Furthermore, the stone plate is provided with a blind hole for accommodating the end of the screw rod on a side of the oblong nut hole away from the bolt through hole, and the blind hole is coaxially arranged with the bolt through hole. Beneficial effects:

[0047] 1. When used to connect the slate and edge of a billiard table, the present invention's slate connector utilizes a self-positioning oblong cylindrical structure, eliminating the need for pre-installation and positioning with steel formwork and the process of pouring marble glue. This significantly reduces pre-installation time and workload, and has been calculated to save over ten times the work time and labor. It takes a worker 15 to 20 minutes to pour 30 nuts on a set of slate, so installing each nut takes 30 to 40 seconds, while hammering an oblong nut takes only three seconds. Furthermore, because there's no positional deviation caused by assembly gaps between nuts and bolts, positioning accuracy is high, improving the accuracy of edge installation.

[0048] 2. Secure installation, eliminating the existing round nut rotation and cracking of the stone slab. Because the oblong nut is wrapped with a hard plastic positioning sleeve, the barbed positioning sleeve is compressed when hammered into the oblong nut hole in the stone slab. The tapered bottom plate also makes installation easier. Simply tap it in with a hammer. The compressed hard plastic barbs create a large interference fit between the oblong nut and the oblong nut hole in the stone slab, firmly securing the oblong nut in the hole without any rotation, eliminating the problem of occasional cracking of the stone countertop.

[0049] 3. It eliminates the phenomenon of crushing at the joints of stone slabs and saves precious stone materials.

[0050] Because the oblong nut changes the line contact of the original round nut into surface contact, the contact area between the slab and the stone is greatly increased. Not counting the arc contact surfaces at both ends, compared with the existing round nut, the oblong nut can increase the contact area by about 40 times, reduce the pressure at the contact point, avoid the stone slab being crushed and scrapped, and the low pressure extends the service life of the stone slab, thereby saving a lot of precious stone.

[0051] 4. Improved the performance of the pool table.

[0052] Due to the large contact area and low pressure, the tightening force can be greatly increased, making the table edge connection more reliable and strong. When hitting the ball, the noise is small and the sound is solid. The table edge will not loosen easily, which significantly improves the competition and entertainment performance of the billiard table and promotes the development of this sport. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] FIG1 is a schematic diagram of the structure of installing round nuts in a stone slab in the prior art;

[0054] FIG2 is a top view of FIG1 ;

[0055] FIG3 is a cross-sectional view of section AA in FIG1 ;

[0056] FIG4 is a cross-sectional view of section BB in FIG1 ;

[0057] FIG5 is a front view of a slate connector according to the present invention;

[0058] FIG6 is a schematic structural diagram of the CC section of the slate connector in FIG5 ;

[0059] FIG7 is a schematic structural diagram of the DD section of the stone slab connector in FIG5 ;

[0060] FIG8 is a schematic diagram of the assembly structure between the billiard table slab and the table edge of the present invention;

[0061] FIG9 is a schematic cross-sectional view of the assembly structure at EE in FIG8 ;

[0062] FIG10 is a schematic diagram of the opening structure of the stone slab in FIG8;

[0063] FIG11 is a schematic diagram showing a contact area comparison between a round nut and an oblong nut;

[0064] FIG12 is a schematic diagram of the three-dimensional structure of the positioning sleeve of the stone slab connector in FIG5.

[0065] Among them, 1-stone plate, 2-bolt, 3-round nut, 4-steel template, 5-marble glue, 6-nut hole, 7-table edge, 8-positioning sleeve, 9-oblong nut, 10-contact position, 11-threaded hole, 12-chamfer, 13-barb, 14-through hole, 15-top plate, 16-bottom plate, 17-middle connecting part, 18-oblong nut hole, 19-bolt through hole, 20-blind hole, 21-through hole, 22-table cloth DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related stone joining industries without making any creative efforts shall fall within the scope of protection of the present invention.

[0067] Example 1

[0068] This embodiment provides a slate connector for a billiard table. The slate connector is used in a billiard table to securely connect the table edge 7 to the side edge of the slate 1 forming the table top. FIG5 shows a schematic structural diagram of the slate connector, FIG6 shows a schematic cross-sectional structural diagram of the slate connector, and FIG7 shows a schematic cross-sectional structural diagram of the slate connector in longitudinal section.

[0069] The stone slab connecting piece includes an oblong nut 9 and a positioning sleeve 8. As shown in the structures of Figures 6 and 7, the oblong nut 9 is an oblong structure and is provided with a threaded hole 11 extending therethrough; as shown in the structures of Figures 7, 8 and 9, the oblong nut 9 is provided with a threaded hole 11 extending therethrough in the transverse direction, and the transverse direction of the oblong nut 9 is consistent with the axial direction of the threaded hole 11 and is consistent with the arrangement direction of the table edge 7 and the stone slab 1; as shown in the structure of Figure 5, the center of the threaded hole 11 coincides with the center of the oblong nut 9 in the height direction and the center of the oblong nut 9 in the width direction. The height direction is the direction from top to bottom or from bottom to top in Figure 5, and the width direction is the direction from left to right or from right to left in Figure 5. When the stone slab connecting piece is installed in the oblong nut hole 18 of the stone slab 1, The height direction of the oblong nut 9 is the thickness direction of the stone slab 1, and the width direction is the same as the length direction or width direction of the stone slab 1, that is, when the oblong nut 9 is installed on the long side of the stone slab 1, the width direction of the oblong nut 9 is the same as the length direction of the stone slab 1, and when the oblong nut 9 is installed on the short side of the stone slab 1, the width direction of the oblong nut 9 is the same as the width direction of the stone slab 1; the threaded hole 11 is located at the geometric center of the oblong nut 9 in the height direction and the width direction, which can make the force between the contact surface of the oblong nut 9 and the stone slab 1 uniform, further reducing the occurrence of stress concentration; chamfers 12 are provided at both ends of the threaded hole 11, as shown in the structure of Figure 5, and the chamfers 12 provided at both ends of the threaded hole 11 facilitate the insertion of the screw end during assembly;

[0070] The locating sleeve 8 is provided with an arc groove for accommodating the oblong nut 9, and is provided with a barb 13 extending along its circumferential direction on the outer side thereof; the locating sleeve 8 is also provided with a through hole 14 extending axially along the threaded hole 11, and the diameter of the through hole 14 is larger than the major diameter of the threaded hole 11; as shown in the structures of Figures 5, 7 and 12, a plurality of barbs 13 extending circumferentially thereof are provided on the outer side of the locating sleeve, and the plurality of barbs 13 can be arranged parallel to the height direction on the outer side of the locating sleeve 8; after the stone slab connecting piece is installed in the oblong nut hole 18 of the stone slab 1, the barbs 13 can prevent the stone slab connecting piece from loosening or falling from the oblong nut hole 18; along the axial extension direction of the threaded hole 11, the locating sleeve 8 is also provided with a through hole 14 corresponding to the position of the threaded hole 11 and connected thereto, so that the screw end of the bolt 2 can pass through the through hole 14 provided in the locating sleeve 8, ensuring the threaded connection length of the bolt 2 and the oblong nut 9, so that a reliable connection is formed between the stone slab 1 and the table edge 7;

[0071] The oblong nut 9 is embedded in the arc-shaped groove of the positioning sleeve 8 in a form-fitting manner, and forms an oblong cylindrical structure with the positioning sleeve 8.

[0072] The above-mentioned stone slab connector not only has an oblong nut 9 with a threaded hole 11, but also has a positioning sleeve 8 for embedding the oblong nut 9. The oblong nut 9 and the positioning sleeve 8 form an oblong cylindrical structure. The outer side of the positioning sleeve 8 is provided with a barb 13. Because the barb 13 is tapered, the bottom size is smaller and the top size is larger. When the stone slab connector composed of the positioning sleeve 8 and the oblong nut 9 is interference-fitted into the oblong nut hole 18 of the stone slab 1, the smaller side of the barb 13 enters the oblong nut hole 18 first, and the larger side enters the oblong nut hole 18 later. This makes it easier to install the stone slab connector and prevents the stone slab connector from withdrawing from the oblong nut hole 18. The barb 13 will abut against the inner wall of the oblong nut hole 18 and generate interference, thereby inhibiting the stone slab connector from withdrawing from the oblong nut hole 18. The positioning sleeve 8 realizes a retreat-stopping function. This improves the installation stability and reliability of the stone slab connector in the stone slab 1.

[0073] When the precision-manufactured oblong nut 9 is mated with the precision-injection-molded positioning sleeve 8, a precise oblong connector is formed that is slightly larger than the oblong nut hole 18 of the stone slab 1. When this connector is hammered into the oblong nut hole 18 of the stone slab 1, its bottom surface contacts and compacts the bottom surface of the oblong nut hole 18. This eliminates the connector's rotational freedom along the X-axis, rotational freedom along the Y-axis, and translational freedom along the Z-axis. The connector's oblong shape eliminates rotational freedom along the Z-axis. The interference fit between the connector and the oblong nut hole 18 of the stone slab, resulting in a tight fit between their two long sides, eliminates the connector's translational freedom along the X-axis and Y-axis. This assembly simultaneously eliminates the connector's six degrees of freedom, effectively satisfying the six-point positioning principle and achieving its self-positioning function. The X-axis may be the length direction or the width direction of the billiard table. Correspondingly, the Y-axis may be the width direction or the length direction of the billiard table, and the Z-axis may be the height direction of the billiard table.

[0074] In a specific embodiment, as shown in the structure of Figure 7, the positioning sleeve 8 is provided with a top plate 15, a bottom plate 16, and an intermediate connecting portion 17 fixedly connected between the top plate 15 and the bottom plate 16; the oblong nut 9 is installed between the top plate 15, the bottom plate 16 and the intermediate connecting portion 17, and fits with the intermediate connecting portion 17 to form a long cylindrical structure; the top plate 15 and the bottom plate 16 are both oblong plates; the oblong outer dimensions of the top plate 15 are slightly larger than the oblong nut hole 18 of the stone slab 1; the oblong outer dimensions of the bottom plate 16 are slightly smaller than the oblong nut hole 18 of the stone slab 1 and have a taper; the through hole 14 and the barb 13 are both provided Placed in the middle connecting part 17; the top surface of the oblong nut 9 is in contact with the top plate 15, the bottom surface is in contact with the bottom plate 16, and one side surface is in contact with the middle connecting part 17; the thickness of the top plate 15 can be less than, equal to or greater than the thickness of the bottom plate 16; the positioning sleeve 8 can be made of plastic material by precision injection molding; the oblong nut 9 is made of metal materials such as copper, steel, iron, and aluminum, and the surface of the oblong nut 9 is rust-proofed, and the internal thread of the oblong nut 9 is carburized and quenched to increase the wear resistance of the internal thread of the oblong nut 9, thereby greatly improving the service life of the oblong nut 9, which is equivalent to improving the service life of the stone slab 1.

[0075] The top plate 15, bottom plate 16 and middle connecting part 17 of the positioning sleeve 8 are integrally injection molded; when the slate connector is installed in the oblong nut hole 18 of the slate 1, the positioning sleeve 8 made of plastic cooperates with the bottom of the oblong nut hole 18, and the thickness of the bottom of the hole can be fixed, and the depth dimension of the processed slate hole is used to ensure that the center line of the oblong nut of the slate connector coincides with the center line of the bolt through-hole 19.

[0076] As shown in the structures of Figures 5 and 6, the oblong nut 9 and the positioning sleeve 8 form an oblong cylindrical structure; the intermediate connecting portion 17 and the oblong nut 9 are arranged and fit together along the axial direction of the threaded hole 11; the cross-sectional shape of the intermediate connecting portion 17 is C-shaped, and forms an arcuate groove for embedding the oblong nut 9; the cross-sectional shape of the oblong nut 9 is oblong (also known as a runway shape), including two flat surfaces on both sides and arcuate surfaces at both ends for connecting the two flat surfaces on both sides, and the outer peripheral surface of the oblong nut 9 cooperates with the shape of the arcuate groove, so that when the oblong nut 9 is embedded in the positioning sleeve 8, the oblong nut 9 is tightly fitted with the arcuate groove of the positioning sleeve 8 through the flat surface and arcuate surface on the outer peripheral side. As shown in the structure of Figure 6, the slate connector adopts an oblong cylindrical structure, and the positioning sleeve 8 semi-encloses the outer side of the oblong nut 9, that is, the top, bottom and part of the outer peripheral side of the oblong nut 9 are wrapped with the positioning sleeve 8, so that the positioning sleeve 8 forms a semi-enclosed structure for the oblong nut 9.

[0077] When used to connect the billiard table's slate 1 and edge 7, the aforementioned slate connector utilizes a self-positioning oblong cylindrical structure, eliminating the need for pre-assembly and positioning using steel formwork and the subsequent marble glue injection process. This significantly reduces pre-assembly time and labor, resulting in a calculated reduction of over ten times the work time and labor. Conventional technology requires 15 to 20 minutes for a worker to inject 30 nuts into a set of slate, resulting in 30 to 40 seconds for each nut. However, hammering down an oblong nut 9 only takes three seconds. Furthermore, because there's no gap between nuts and bolts to prevent positional deviation, positioning accuracy is high, improving the accuracy of edge installation.

[0078] The above-mentioned stone slab connector features secure installation and eliminates the phenomenon of the nut rotating and breaking the stone slab 1. Because the oblong nut 9, which is covered with a hard plastic positioning sleeve 8, is hammered into the oblong nut hole 18 of the stone slab 1, the positioning sleeve 8 with barbs 13 is compressed. The tapered design facilitates installation. A gentle downward tap with a hammer is sufficient, and the compressed hard plastic barbs 13 create a certain interference fit between the oblong nut 9 and the oblong nut hole 18 of the stone slab 1, firmly fixing the oblong nut 9 in the oblong nut hole 18 of the stone slab 1 without any rotation, thus eliminating the phenomenon of the stone slab countertop being occasionally broken.

[0079] The above-mentioned stone slab connector eliminates the phenomenon of crushing at the connection between the stone slab 1 and the table edge, saving precious stone materials. As shown in the structure of Figure 11, the contact position 10 and contact area between the existing round nut 3 and the oblong nut 9 of the present invention and the stone slab 1 are compared: the existing round nut 3 has a line contact with the stone slab 1, and the contact position 10 is only two lines on the upper and lower sides of the threaded hole. The actual contact area is about 10mm. 2 The oblong nut 9 of the present invention is in surface contact with the stone slab 1. The contact position 10 includes not only a plane but also a section of arc-shaped surfaces at both ends of the plane. The actual contact area between the oblong nut 9 of the present invention and the stone slab 1 is about 410mm in plane calculation. 2 ; The actual contact area of ​​the oblong nut 9 of the present invention is more than 40 times larger than the actual contact area of ​​the existing round nut 3, not counting the arc surface; since the oblong nut 9 has changed from the original line contact to surface contact, the contact area between the oblong nut 9 and the stone slab 1 is greatly increased. Compared with the existing round nut, the oblong nut 9 can increase the contact area by about 40 times, reduce the pressure at the contact point, avoid the phenomenon of the stone slab being crushed and scrapped, and the low pressure extends the service life of the stone slab, thereby saving a lot of precious stone.

[0080] The use of these slate connectors improves the performance of billiard tables. Due to the large contact area and low pressure between the oblong nut 9 and the slate 1, the tightening force can be significantly increased, making the table edge connection more reliable and secure. This reduces noise and provides a firmer sound when hitting a ball, preventing the table edge from loosening easily. This significantly enhances the table's playing and entertainment capabilities, promoting the development of the sport.

[0081] Example 2

[0082] The present embodiment provides a billiard table, which includes a stone slab 1, a table edge 7, a bolt 2, a table cloth 22, and the stone slab connecting member provided in the above embodiment; as shown in the structure of Figure 10, a plurality of oblong nut holes 18 are provided on the bottom surface of the stone slab 1, and bolt through holes 19 are provided on the side of the stone slab 1, which are connected to the oblong nut holes 18 in a one-to-one correspondence. A blind hole 20 is also provided on the side of the oblong nut hole 18 away from the bolt through hole 19, which is opposite to and coaxial with the bolt through hole 19. The blind hole 20 can accommodate the screw end of the bolt 2; the oblong nut hole 18 is an oblong hole, and the oblong nut hole 18 matches the shape of the stone slab connecting member, and the oblong nut hole 18 is embedded in the stone slab connecting member with an oblong cylindrical structure; as shown in Figures 8 and As shown in the structure of Figure 9, the table edge 7 is provided with through holes 21 corresponding to the positions of the bolt through holes 19; the stone slab connecting piece is inserted into the oblong nut hole 18 with an interference fit, and the oblong nut 9 of the stone slab connecting piece is located on one side of the bolt through hole 19, and the threaded hole 11 of the oblong nut 9 is arranged opposite to and connected with the bolt through hole 19; the screw end of the bolt 2 passes through the through hole 21, the table cloth 22 and the bolt through hole 19 in turn and is threadedly connected to the threaded hole 11, which is used to fix the table edge 7 to the stone slab 1 and clamp the table cloth 22 between the table edge 7 and the stone slab 1. The bolt 2 with a pointed end is used to facilitate piercing the table cloth 22 through the pointed end, avoiding the process of using a flat-head screw to connect because it cannot penetrate the table cloth and needs to cut the table cloth 22.

[0083] The billiard table adopts the above-mentioned assembly structure, and the entire slate connector is assembled into the oblong nut hole 18 of the slate 1. One end of the screw rod of the bolt 2 passes through the through hole 21 of the table edge 7, the table cloth 22 and the bolt through hole 19 of the slate 1 in sequence, and then is threadedly connected with the threaded hole 11 of the oblong nut 9, pressing the table edge 7 and fixing it to the slate 1; the oblong nut 9 and the oblong nut hole 18 are matched with the flat surface and the smooth curved surface to avoid stress concentration, and avoid the occurrence of cracking at the oblong nut hole 18 of the slate 1 due to stress concentration, while improving the connection strength. The oblong nut hole 18 and the stone slab connector both adopt an oblong structure, which can realize self-positioning between the stone slab connector and the stone slab 1, prevent the oblong nut 9 from rotating, eliminate the phenomenon that the stone slab 1 table top is broken by the rotation of the oblong nut 9, and automatically align the threaded hole 11 with the bolt through-hole 19, so that the bolt 2 can quickly be threaded with the threaded hole 11, thereby improving the matching speed of the bolt 2 and the oblong nut 9, shortening the assembly time, and improving the installation efficiency of the billiard table.

[0084] In addition, since barbs 13 are provided on the outer side of the positioning sleeve 8, after the positioning sleeve 8 is installed in the oblong nut hole 18, the interference fit between the barbs 13 and the oblong nut hole 18 of the stone slab 1 can prevent the stone slab connecting piece from loosening or falling out of the oblong nut hole 18, so that the positioning sleeve 8 and the oblong nut 9 can be reliably embedded in the oblong nut hole 18 of the stone slab 1, which is beneficial to improve the reliability and stability of the connection, provide convenience for the subsequent disassembly and assembly of the table edge 7, and avoid the loss of the stone slab connecting piece during the disassembly and assembly process.

[0085] A blind hole 20 for accommodating the end of the screw is provided on the side of the oblong nut hole 18 of the stone slab 1 away from the bolt through-hole 19, and the blind hole 20 is coaxial with and connected to the threaded hole 11 and the bolt through-hole 19. When the table edge 7 is fixed to the stone slab 1 by the bolt 2, the screw end of the bolt 2 threadedly connected to the threaded hole 11 of the oblong nut 9 can extend into the blind hole 20, thereby increasing the freedom of choice of the length of the bolt 2 on the basis of ensuring that the bolt 2 is fully connected to the threaded hole 11.

[0086] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slate connector for a billiard table, characterized in that: It includes an oblong nut and a positioning sleeve; wherein: The oblong nut is an oblong structure and is provided with a threaded hole running through it; The positioning sleeve is provided with an arc-shaped groove for accommodating the oblong nut, and is provided with barbs extending along its circumference on its outer side surface; The oblong nut is embedded in the arc-shaped groove in a shape-matched manner and forms an oblong columnar structure 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 threaded hole, and the diameter of the through hole is larger than the major diameter of the threaded hole.

3. The stone slab connector according to claim 2, characterized in that: The positioning sleeve is provided with a top plate, a bottom plate, and an intermediate connecting portion fixedly connected between the top plate and the bottom plate; The oblong nut is installed between the top plate and the bottom plate, and fits with the middle connecting portion to form an oblong cylindrical structure; The top plate and the bottom plate are both oblong plates; The through hole and the barb are both arranged on the middle connecting portion.

4. The stone slab connector according to claim 3, characterized in that: The cross-section of the intermediate connecting portion is C-shaped and forms the arc-shaped groove; The intermediate connecting portion and the oblong nut are arranged and fitted together along the axial direction of the threaded hole.

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

6. The stone slab connector according to any one of claims 1 to 5, characterized in that: The center of the threaded hole coincides with the center of the oblong nut in the height direction and the center of the oblong nut in the width direction; Chamfers are provided at both ends of the threaded hole.

7. The stone slab connector according to claim 6, characterized in that: The positioning sleeve is provided with a plurality of parallel barbs along the height direction thereof.

8. The stone slab connector according to claim 6, characterized in that: The positioning sleeve is made of plastic material by precision injection molding; The oblong nut is made of metal material, the outer surface is subjected to rust-proof treatment, and the thread is subjected to carburizing and quenching treatment.

9. A billiard table, characterized in that: The invention comprises a stone slab, a table edge, a bolt and a stone slab connecting member according to any one of claims 1 to 8; The bottom surface of the stone slab is provided with a plurality of oblong nut holes, and the side surface of the stone slab is provided with bolt through holes corresponding to the positions of the oblong nut holes one by one; The platform edge is provided with through holes corresponding to the bolt penetration positions one by one; The stone slab connector is inserted into the oblong nut hole with an interference fit, the oblong nut of the stone slab connector is located on one side of the bolt through-hole, and the threaded hole of the oblong nut is relatively connected to the bolt through-hole; The screw rod of the bolt passes through the through hole, the table cloth and the bolt through hole in sequence and is threadedly connected with the threaded hole to fix the table edge on the stone slab.

10. The billiard table according to claim 9, wherein: The stone plate is provided with a blind hole for accommodating the end of the screw rod on a side of the oblong nut hole away from the bolt through hole, and the blind hole is coaxially arranged with the bolt through hole.

Images