A sliding rail type foldable table tennis table

Abstract

The application discloses a sliding rail type foldable table tennis table, which comprises a supporting frame, two table bodies rotatably installed on the supporting frame and a side plate fixedly arranged on the supporting frame, a plurality of moving wheels are arranged below the supporting frame, and supporting legs are rotatably installed below the table bodies; the supporting frame and the two table bodies are matched with a connecting rod mechanism composed of a first connecting rod and a second connecting rod, so that the table bodies can obtain stable auxiliary supporting force during upward rotation folding or downward rotation unfolding. The connecting rod mechanism synchronously links the folding and unfolding of the supporting legs with the movement of the table bodies through a rotary connection mode, significantly reduces the required pushing and pulling force, effectively solves the problems that the existing foldable table tennis table is complicated to fold, needs cooperation of multiple people and is easy to shake, and easily realizes state switching with less labor, and improves the use convenience in a space limited environment.

Description

Technical Field

[0001] This invention is a sliding rail type foldable ping-pong table, belonging to the field of folding table technology. Background Technology

[0002] In modern urban life, especially in homes, offices, and entertainment venues with limited living space, table tennis is widely popular due to its excellent fitness and social benefits. To adapt to space constraints, foldable table tennis tables have become a common solution for easy storage and deployment.

[0003] However, existing foldable ping-pong tables have significant drawbacks in practical applications. Traditional designs often employ simple hinges or folding mechanisms, resulting in folding and unfolding operations requiring considerable physical effort and typically necessitating two people. This leads users to tend to keep the table unfolded for extended periods during daily use, thus occupying valuable space. Attempting frequent folding to save space, on the other hand, presents another series of problems: Accessories such as the racket and ping-pong ball lack integrated securing devices and usually need to be stored separately in external containers. When moving the table using the wheels at the bottom, the continuous vibration generated by rolling can easily cause the accessories to slip off or be lost. At the same time, the installation and removal of the net assembly is cumbersome and often requires additional tools and time to adjust its position.

[0004] These problems form a causal chain. The cumbersome folding operation directly leads users to reduce the frequency of folding, exacerbating the space occupation problem. Furthermore, the insecurity of accessory storage is amplified by vibration during movement, causing frequent loss and damage. Ultimately, this significantly reduces the overall practicality of the device, failing to meet the dual requirements of easy and convenient operation and safe protection of accessories. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a sliding rail type foldable ping-pong table to solve the problems in the existing technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A sliding, foldable ping-pong table includes: The support frame, two table pieces that can be rotatably mounted on the support frame, and side panels fixedly mounted on the support frame; Multiple casters are provided below the support frame; The table body is rotatably mounted with support legs underneath; Two first connecting rods are provided between the table body and the support frame. The middle part of the support leg is rotatably connected to the lower end of the first connecting rods, and the two ends of the first connecting rods are rotatably connected to the support frame and the table body, respectively. The support frame is equipped with a sliding positioning component, which is used to selectively fix the table body in an unfolded or folded state. The side plate is provided with a placement groove and a placement hole, which are used to place the racket body and the ball, respectively. A net assembly is installed on the side panel, which can deploy a net between the two table bodies when they are unfolded. A negative pressure component is provided inside the side plate, and the negative pressure component works in conjunction with the sliding positioning component to: When the table body is folded from the unfolded state to the folded state and the sliding positioning component slides downward, the negative pressure component applies negative pressure to fix the racket placed in the placement groove and the ball placed in the placement hole. When the table body unfolds from the folded state to the unfolded state and the sliding positioning component slides upward, the negative pressure component releases the negative pressure adsorption and fixation on the racket body and the ball.

[0007] As a further improvement, the support frame includes two sets of crossbars, vertical poles mounted above the middle of the crossbars, and a third connecting rod connecting the bottoms of the two vertical poles.

[0008] As a further improvement, the sliding positioning assembly includes a vertical rod disposed on the support frame, a sleeve slidably mounted on the vertical rod, a first slot and a second slot disposed on the vertical rod, and a through hole disposed on the sleeve.

[0009] As a further improvement, the sliding positioning assembly also includes a positioning rod that is movably inserted into the through hole, the positioning rod being selectively inserted into the first slot or the second slot to fix the table body in an unfolded or folded state.

[0010] As a further improvement, a magnetic sheet is embedded inside the through hole, and the positioning rod is a metal rod. The magnetic sheet is used to assist in fixing the positioning rod inserted into the through hole.

[0011] As a further improvement, the negative pressure assembly includes a sealing ring embedded in the upper edge of the placement groove and the placement hole, a paddle inserted in the placement groove, and a ball inserted in the placement hole that abuts against the sealing ring.

[0012] As a further improvement, the negative pressure assembly also includes a cavity tube disposed inside the side plate, the cavity tube being connected to the placement hole and the placement groove above.

[0013] As a further improvement, the negative pressure assembly also includes a sliding rod slidably installed inside the cavity tube, with a rubber ring embedded on the outer ring surface of the upper end of the sliding rod, and the rubber ring being interference-fitted with the cavity tube.

[0014] As a further improvement, the sliding positioning assembly includes a protrusion on the side of the sleeve facing the side plate, and the side plate is provided with a vertical guide groove corresponding to the protrusion. The protrusion is inserted into the guide groove and is located directly below the sliding rod.

[0015] As a further improvement, a traction belt is fixedly installed between the sliding positioning component and the negative pressure component; When the table body is folded and the sliding positioning component slides downward, the traction belt pulls the sliding rod downward, creating negative pressure inside the cavity, the placement hole, and the placement groove, which then adsorbs the ball and the racket body under negative pressure. When the table body is unfolded and the sliding positioning component moves upward, the protrusion pushes the sliding rod upward, releasing the negative pressure inside the cavity, the placement hole, and the placement groove, thereby releasing the adsorption of the ball and the racket body. The net assembly is fixedly mounted on the support rods inside the side plate by bolts, and the net is fitted between the two support rods.

[0016] Beneficial effects 1. This invention employs a linkage mechanism consisting of a support frame and two table panels connected by a first and a second connecting rod. This mechanism provides stable auxiliary support during upward folding or downward unfolding of the table panels. The linkage mechanism synchronizes the extension and retraction of the support legs with the movement of the table panels through a rotating connection, significantly reducing the pushing and pulling force required for operation. This effectively solves the problems of existing foldable ping-pong tables, such as cumbersome folding processes, the need for multiple people to work together, and susceptibility to wobbling. It enables easy and effortless switching between states, improving usability in space-constrained environments.

[0017] 2. This invention features a frame structure on the support frame, consisting of crossbars, uprights, and a third connecting rod. The third connecting rod laterally connects the two uprights, and the rectangular frame formed by the crossbars ensures that the entire support frame maintains high torsional and deformation stiffness during table folding or movement. The frame structure achieves rigid connection of each member through welding or bolting, ensuring the uprights remain vertically stable and providing a reliable guide rail foundation for the subsequent sliding positioning components. This avoids the problems of swaying linkages or uneven force on the moving wheels caused by traditional frame wobbling, thus improving overall structural stability.

[0018] 3. The sliding positioning component of this invention includes a sleeve that can slide along the upright, a first slot and a second slot on the upright, and a through hole on the sleeve. By selectively inserting a positioning rod into the corresponding slot, rapid and accurate positioning of the table in its unfolded or folded state is achieved. The sliding fit structure allows the sleeve to precisely align with the slot and lock it in place via the positioning rod when moving up and down, thus solving the problems of low positioning accuracy and cumbersome operation in existing fixing mechanisms. It enables easy state switching and maintains high repeatability.

[0019] 4. The sliding positioning component of the present invention further incorporates a magnetic sheet embedded inside the through hole, which works in conjunction with a metal positioning rod. The positioning rod, inserted into the through hole, is secured by magnetic attraction, ensuring it remains tightly fitted to the inner wall of the through hole even under vibration. This magnetic-assisted structure eliminates the need for additional locking components; only a pulling force greater than the magnetic attraction is required to unlock it. This prevents the disengagement failure of traditional positioning mechanisms due to accidental collisions or rolling vibrations, significantly improving positioning reliability, ensuring structural safety in the folded state, and reducing the risk of accidental unfolding of accessories.

[0020] 5. This invention features placement grooves and holes on the side plate, and a sealing ring embedded in its inner upper edge cooperates with the negative pressure component, ensuring that the racket body and ball can tightly abut against the sealing ring after insertion, forming an initial airtight interface. The sealing ring is made of continuously embedded elastic material, effectively transferring negative pressure to the placement area by compensating for minute gaps. This solves the problems of poor sealing and easy leakage in existing accessory storage devices, leading to insecure fixation. It provides reliable sealing conditions for subsequent negative pressure adsorption, achieving damage-free and secure fixation, and preventing accessories from slipping or being lost due to vibration during movement.

[0021] 6. The negative pressure component of this invention, through a piston-like structure formed by a cavity tube, a sliding rod, and a rubber ring, works in conjunction with the protrusion, guide groove, and traction belt of the sliding positioning component. This allows the traction belt to pull the sliding rod to create negative pressure when the sliding positioning component moves downwards, and the protrusion to push the sliding rod to release the negative pressure when it moves upwards. The linkage mechanism achieves synchronous control by transmitting tension through the traction belt and thrust through the protrusion. The upper branch tube of the cavity tube connects to the placement groove and the placement hole, thus automatically completing the adsorption fixation and release in a single sliding operation. This solves the problem of existing equipment accessories requiring manual fixing or separate storage, and involving numerous operating steps. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a sliding rail type foldable ping-pong table according to the present invention.

[0024] Figure 2 This is an enlarged structural diagram of the placement groove and placement hole of a sliding rail type foldable ping-pong table of the present invention, showing the structure without any items placed there.

[0025] Figure 3 This is an enlarged structural diagram of the placement groove and placement hole for placing items in a sliding rail type foldable ping-pong table according to the present invention.

[0026] Figure 4 This is a partially enlarged side view of a sliding rail type foldable ping-pong table according to the present invention.

[0027] Figure 5 yes Figure 4 A partially enlarged cross-sectional structural diagram.

[0028] Figure 6 This is a perspective view of the fitting structure of a positioning rod and a sleeve according to the present invention.

[0029] Figure 7 yes Figure 4 Enlarged structural diagram at point A in the middle.

[0030] 1. Support frame; 2. Casters; 3. Table body; 4. Support legs; 5. First connecting rod; 51. Second connecting rod; 6. Horizontal bar; 7. Vertical bar; 8. Third connecting rod; 9. Sleeve; 10. First slot; 11. Second slot; 12. Through hole; 13. Positioning rod; 14. Side plate; 15. Placement groove; 16. Placement hole; 17. Net; 18. Magnetic sheet; 19. Negative pressure assembly; 20. Sealing ring; 21. Cavity tube; 22. Sliding rod; 23. Rubber ring; 24. Protrusion; 25. Guide groove; 26. Traction belt; 27. Support rod; 101. Racket body; 102. Ball. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a 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 those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] Reference Figure 1-7 As shown, a sliding rail type foldable ping-pong table includes: The support frame 1, two table pieces 3 rotatably mounted on the support frame 1, and a side plate 14 fixedly mounted on the support frame 1; multiple casters 2 are provided below the support frame 1. A support leg 4 is rotatably installed under the table body 3; two first connecting rods 5 are provided between the table body 3 and the support frame 1, and a second connecting rod 51 is rotatably connected to the middle part of the support leg 4 and the lower end of the first connecting rod 5. The two ends of the first connecting rod 5 are rotatably connected to the support frame 1 and the table body 3 respectively. The support frame 1 is provided with a sliding positioning component, which is used to selectively fix the table body 3 in the unfolded or folded state; the side plate 14 is provided with a placement groove 15 and a placement hole 16, which are used to place the racket body 101 and the ball 102 respectively; a ball net assembly is installed on the side plate 14, which can unfold a ball net 17 in the middle when the two table bodies 3 are unfolded; A negative pressure component 19 is provided inside the side panel 14. The negative pressure component 19 works in conjunction with the sliding positioning component, such that: when the table body 3 is folded from the unfolded state to the folded state and the sliding positioning component slides downward, the negative pressure component 19 applies negative pressure to fix the racket body 101 placed in the placement groove 15 and the ball 102 placed in the placement hole 16; when the table body 3 is unfolded from the folded state to the unfolded state and the sliding positioning component slides upward, the negative pressure component 19 releases the negative pressure to fix the racket body 101 and the ball 102.

[0034] By integrating the support frame 1, table body 3, side panel 14, sliding positioning component and negative pressure component 19, the technical problems mentioned in the background technology, such as cumbersome folding operation, unsafe storage of accessories, and easy loss of items due to vibration during movement, are effectively solved.

[0035] In actual use, the user can first place the racket body 101 into the placement groove 15 on the side plate 14, and then place the ball body 102 into the placement hole 16.

[0036] When the table needs to be folded from the unfolded state to the folded state, the sliding positioning component is pushed down by the folding table body 3. This operation assists the two table bodies 3 to rotate smoothly upward through the linkage mechanism of the first connecting rod 5 and the second connecting rod 51, while the support legs 4 are retracted at the same time. On the other hand, the downward movement of the sliding positioning component, in conjunction with the negative pressure component 19, creates a negative pressure environment inside the placement groove 15 and the placement hole 16, achieving a firm negative pressure adsorption and fixation of the racket body 101 and the ball 102. The sliding positioning component then locks into the folded state.

[0037] At this point, the user can easily move the entire table by pushing it using the multiple casters 2 under the support frame 1, without worrying about the accessories falling off or getting damaged.

[0038] When it needs to be unfolded for use, slide the positioning component upwards, and the negative pressure component 19 will release its suction fixation. Under the action of the linkage mechanism, the table body 3 will rotate downwards and unfold to a horizontal position. The net assembly will then unfold the net 17 between the two table bodies 3, and the sliding positioning component will fix the unfolded state. The whole process can be completed easily and smoothly.

[0039] By achieving simultaneous folding and positioning actions with negative pressure adsorption fixation, multiple functions such as folding the table body 3, automatically fixing accessories, and locking status can be completed with a single sliding operation, greatly improving operational convenience and efficiency.

[0040] Compared with existing technologies, this solution avoids the risk of loss caused by traditional separate storage of accessories. It provides a reliable and damage-free fixing method through the negative pressure component 19, without the need for additional containers or manual binding. At the same time, the linkage structure such as the first connecting rod 5 and the second connecting rod 51, together with the sliding positioning component, makes the folding and unfolding process more effortless and smooth, making it particularly suitable for easy operation in space-constrained environments.

[0041] See attached document Figure 1 and 4 The table body 3 rotates upward around the main rotating hinge on the support frame 1. The two ends of the first connecting rod 5 are respectively hinged to the upper part of the upright 7 and the lower side of the table body 3. The sleeve 9 is connected to the side of the table body 3 through the connecting shaft. Its downward movement drives the table body to rotate through the lever action. At the same time, the second connecting rod 51 is linked to the support leg 4 to retract.

[0042] In addition, the side plate 14 integrates functional modules such as placement groove 15, placement hole 16, ball net assembly and negative pressure assembly 19, which not only optimizes the overall structural compactness, but also effectively protects the accessories in the folded state, effectively overcoming the chain problems of inconvenient operation, difficult accessory management and poor mobility safety in existing equipment.

[0043] In order to further improve the overall rigidity and anti-deformation ability of the support frame 1 during the upward rotation and folding of the table body 3 and the retraction and extension of the support legs 4, and to avoid problems such as sluggish operation of the linkage mechanism or uneven force on the moving wheels 2 caused by frame shaking, the support frame 1 includes two sets of crossbars 6, vertical poles 7 installed above the middle of the crossbars 6, and a third connecting rod 8 connecting the bottom of the two vertical poles 7.

[0044] Two sets of horizontal bars 6 are set parallel to each other at the bottom of the support frame 1. Each set of horizontal bars 6 consists of multiple rods forming a rectangular or trapezoidal frame structure. The uprights 7 are vertically installed above the middle of each set of horizontal bars 6 by welding or bolting to form the main support column. The third connecting rod 8 horizontally passes through the bottom of the two uprights 7 and is firmly connected to the horizontal bars 6 to enhance the torsional strength of the frame.

[0045] In practical use, multiple casters 2 are fixedly installed below the crossbar 6 of the support frame 1, allowing the entire ping-pong table to be easily moved. The upper part of the upright 7 is rotatably connected to the table body 3 via the first connecting rod 5. At the same time, a sliding positioning component is set in the middle of the upright 7, and the side plate 14 is fixed to one side of the support frame 1. Through the lateral tensioning effect of the third connecting rod 8, the support frame 1 remains horizontal and stable when the two table bodies 3 rotate under the drive of the linkage mechanism, and the upright 7 remains vertical without deviation, providing a reliable guide rail foundation for the subsequent vertical movement of the sliding positioning component.

[0046] To achieve rapid and accurate positioning of the table 3 in its unfolded and folded states, and to facilitate operation while avoiding the problems of inaccurate positioning or cumbersome operation of traditional fixed mechanisms, the sliding positioning assembly includes a vertical rod 7 mounted on the support frame 1, a sleeve 9 slidably mounted on the vertical rod 7, a first slot 10 and a second slot 11 on the vertical rod 7, and a through hole 12 on the sleeve 9. The sleeve 9 is fitted onto the outside of the vertical rod 7 with a clearance fit and can slide freely up and down along the axial direction of the vertical rod 7. The first slot 10 is located at the height of the vertical rod 7 corresponding to the unfolded position of the table 3, and the second slot 11 is located at the height of the vertical rod 7 corresponding to the folded position of the table 3. The through hole 12 is located on the side wall of the sleeve 9, and its height position can be aligned with the first slot 10 or the second slot 11.

[0047] During use, the user pulls the table body 3 upwards to unfold it. When folding, first fold the table body 3 upwards, and simultaneously slide the table body 3 with the sleeve 9; During this process, the sleeve 9 slides up or down along the upright 7 to the desired position, and then the positioning rod 13 is inserted into the through hole 12 and inserted into the corresponding slot to achieve locking, thereby selectively fixing the unfolded or folded state of the table body 3. This sliding fit method ensures high positioning accuracy and good repeatability.

[0048] The working principle of the sliding positioning component is that the sleeve 9 and the upright 7 form a linear sliding pair. The sleeve 9 is also rotatably connected to the side of the table body 3 through a connecting shaft. The first slot 10 and the second slot 11 on the upright 7 serve as positioning holes, and the through hole 12 serves as the channel for the positioning rod 13. When the positioning rod 13 is inserted, the sleeve 9 can no longer slide and the position of the table body 3 is indirectly locked through the first connecting rod 5.

[0049] To prevent the positioning rod 13 from dislodging from the through hole 12 due to vibration or accidental impact during use, and to avoid the table body 3 from accidentally unfolding or folding due to positioning failure, a magnetic piece 18 is embedded inside the through hole 12. The positioning rod 13 is a metal rod, and the magnetic piece 18 is used to assist in fixing the positioning rod 13 inserted into the through hole 12. The magnetic piece 18 is fixed to the inner wall of the through hole 12 by embedded installation. One end of the positioning rod 13 has a handle for easy insertion and removal, and the other end is a smooth cylinder.

[0050] In use, once the positioning rod 13 is fully inserted into the through hole 12, the magnetic plate 18 generates a magnetic attraction force on the metal positioning rod 13, causing it to fit tightly against the inner wall of the through hole 12, preventing loosening or detachment. When unlocking is required, the user only needs to apply a pulling force greater than the magnetic attraction force to pull out the positioning rod 13. This magnetic-assisted fixing structure is simple and reliable, requiring no additional locking screws. The combined action of magnetic force and friction ensures that the positioning rod 13 remains stable even under the vibration generated by the rolling of the moving wheel 2.

[0051] To ensure a reliable seal between the racket body 101 placed in the placement groove 15 and the ball 102 placed in the placement hole 16 before negative pressure adsorption, and to prevent air leakage that could prevent the establishment of negative pressure or weak adsorption, the negative pressure assembly 19 includes a sealing ring 20 embedded in the upper inner side of the placement groove 15 and the placement hole 16. The racket body inserted in the placement groove 15 and the ball 102 inserted in the placement hole 16 abut against the sealing ring 20. The sealing ring 20 is made of elastic rubber material and is continuously embedded along the upper edge of the placement groove 15 and the placement hole 16 and fixed by adhesive or a slot.

[0052] During use, when the racket body 101 is inserted into the placement groove 15 and the ball 102 is inserted into the placement hole 16, their outer surfaces come into close contact with the sealing ring 20 to form an initial airtight interface, providing sealing conditions for the subsequent formation of negative pressure. The function of the sealing ring 20 is to compensate for the small gaps between the racket body 101 and the ball 102 and the groove, ensuring that the negative pressure in the cavity tube 21 can be effectively transmitted to the placement area.

[0053] To create a closed negative pressure cavity above the cavity tube 21 when the sliding rod 22 moves, thus reliably adsorbing and fixing the racket body 101 and the ball 102, the negative pressure assembly 19 also includes a cavity tube 21 disposed inside the side plate 14. The cavity tube 21 is connected to the placement hole 16 and the placement groove 15 at its top. The cavity tube 21 is a vertical cylindrical pipe, which is fixed inside the side plate 14 by integral molding or welding. Its upper end is connected to the lower part of the placement hole 16 and the placement groove 15 through multiple branch pipes, forming an air passage connection structure.

[0054] In use, the cavity 21 serves as the main cavity of the negative pressure generator. When the sliding rod 22 moves downward, the volume of the space above increases, creating negative pressure. This negative pressure is transmitted to the placement hole 16 and the placement groove 15 through the connecting branch pipe, generating a downward suction force on the ball 102 and the racket body 101. This connecting structure ensures the synchronous action of negative pressure in multiple placement positions.

[0055] To precisely control the establishment and release of negative pressure inside the cavity 21 through the piston-like movement of the sliding rod 22, the negative pressure assembly 19 also includes a sliding rod 22 slidably installed inside the cavity 21. A rubber ring 23 is embedded in the outer ring surface of the upper end of the sliding rod 22, and the rubber ring 23 is interference-fitted with the cavity 21. The sliding rod 22 is a cylindrical rod, which is precisely fitted inside the cavity 21, and the rubber ring 23 is embedded in the outer ring surface of the upper end through an annular groove to form a dynamic sealing structure.

[0056] During use, when the sliding rod 22 is pulled downward, the rubber ring 23 slides tightly against the inner wall of the cavity tube 21, preventing air from entering the upper cavity from below, thereby generating negative pressure in the upper space. When the sliding rod 22 is pushed upward, the negative pressure in the upper cavity decreases, quickly releasing the pressure. The working principle of this piston structure is similar to that of a manual air pump, achieving unidirectional negative pressure control through the interference seal of the rubber ring 23, ensuring stable and controllable adsorption force.

[0057] To enable the sliding positioning component to directly drive the sliding rod 22 of the negative pressure component 19 through its up-and-down movement, achieving synchronized linkage and avoiding the structural complexity caused by a separate drive mechanism, the sliding positioning component includes a protrusion 24 on the side of the sleeve 9 facing the side plate 14. The side plate 14 has a vertical guide groove 25 corresponding to the protrusion 24. The protrusion 24 is inserted into the guide groove 25 and located directly below the sliding rod 22. The protrusion 24 is integrally formed with the sleeve 9. The guide groove 25 is a vertically elongated groove on the side plate 14, slightly wider than the protrusion 24, allowing the protrusion 24 to move freely up and down within the groove.

[0058] In use, the protrusion 24 moves synchronously with the sleeve 9 along the guide groove 25. When the sleeve 9 slides upward, the protrusion 24 directly contacts and pushes the lower end of the sliding rod 22 upward, releasing the negative pressure. When the sleeve 9 slides downward, the sliding rod 22 is pulled downward by the traction belt 26. This structure ensures the directness and reliability of the mechanical linkage, eliminating the need for additional sensors or motors.

[0059] In order to enable the sliding positioning component to automatically build negative pressure when sliding down and automatically release negative pressure when sliding up, and to ensure that the ball net component can automatically take place when the table body 3 is unfolded, a traction belt 26 is fixedly installed between the sliding positioning component and the negative pressure component 19. When the table body 3 is folded and the sliding positioning component slides downward, the traction belt 26 pulls the sliding rod 22 downward, creating a negative pressure inside the cavity tube 21, the placement hole 16, and the placement groove 15, which adsorbs the ball 102 and the racket body 101 under negative pressure. When the table body 3 is unfolded and the sliding positioning component moves upward, the protrusion 24 pushes the sliding rod 22 upward, releasing the negative pressure inside the cavity tube 21, the placement hole 16, and the placement groove 15, and releasing the adsorption on the ball 102 and the racket body 101. The net assembly is bolted to the support rods 27 on the inner side of the side plate 14, and the net 17 is fitted between the two support rods 27. The traction belt 26 is made of flexible high-strength material, with one end fixed to the lower part of the sleeve 9 or the protrusion 24, and the other end fixed to the lower end of the sliding rod 22. The support rods 27 are vertically fixed to the middle of the inner side of the side plate 14 by bolts. The two support rods 27 are arranged in parallel, and the net 17 is fitted between the two support rods 27 and can be expanded or retracted along the axial direction of the support rods 27.

[0060] During use, when the user folds the table body 3 and pushes the sleeve 9 downward, the traction belt 26 pulls the sliding rod 22 downward to create negative pressure adsorption accessories, and the net 17 naturally retracts as the table body 3 is folded up; when the user slides the sleeve 9 upward to unfold the table body 3, the protrusion 24 pushes the sliding rod 22 to release the negative pressure, and the net 17 automatically unfolds between the two rods 27 to the middle position of the two table body pieces 3 and remains taut.

[0061] The negative pressure is established by transmitting tension through the traction belt 26, and the negative pressure is released by transmitting thrust through the protrusion 24. The bolt fixing method between the support rod 27 and the net 17 ensures that the net 17 is centered and its height is adjustable in the unfolded state. The whole process does not require additional manual adjustment of the net 17 or fixing accessories, which significantly improves the continuity of operation and safety.

[0062] It should be noted that all standard parts used in this invention can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A sliding rail type foldable ping-pong table, characterized in that, include: Support frame (1), two table pieces (3) that can be rotatably mounted on the support frame (1), and side plates (14) fixedly mounted on the support frame (1). Multiple casters (2) are provided below the support frame (1); The table body (3) is rotatably mounted with support legs (4) below it; Two first connecting rods (5) are provided between the table body (3) and the support frame (1). The middle part of the support leg (4) is rotatably connected to the lower end of the first connecting rods (5) and the two ends of the first connecting rods (5) are rotatably connected to the support frame (1) and the table body (3) respectively. The support frame (1) is provided with a sliding positioning component, which is used to selectively fix the table body (3) in an unfolded or folded state. The side plate (14) is provided with a placement groove (15) and a placement hole (16) for placing the racket body (101) and the ball (102), respectively. A net assembly is installed on the side panel (14), which is capable of unfolding a net (17) in the middle when the two table bodies (3) are unfolded. A negative pressure component (19) is provided inside the side plate (14). The negative pressure component (19) is linked with the sliding positioning component to ensure that: When the table body (3) is folded from the unfolded state to the folded state and the sliding positioning component slides down, the negative pressure component (19) performs negative pressure adsorption and fixation on the racket (101) placed in the placement groove (15) and the ball (102) placed in the placement hole (16); When the table body (3) unfolds from the folded state to the unfolded state and the sliding positioning component slides upward, the negative pressure component (19) releases the negative pressure adsorption and fixation on the racket body (101) and the ball (102).

2. The sliding rail type foldable ping-pong table according to claim 1, characterized in that, The support frame (1) includes two sets of crossbars (6), a vertical pole (7) installed above the middle of the crossbars (6), and a third connecting rod (8) connecting the bottom of the two vertical poles (7).

3. A sliding rail type foldable ping-pong table according to claim 1, characterized in that, The sliding positioning assembly includes a vertical rod (7) mounted on the support frame (1), a sleeve (9) slidably mounted on the vertical rod (7), a first slot (10) and a second slot (11) mounted on the vertical rod (7), and a through hole (12) mounted on the sleeve (9). The sleeve (9) is rotatably connected to the side of the table body (3) via a connecting shaft.

4. A sliding rail type foldable ping-pong table according to claim 3, characterized in that, The sliding positioning assembly also includes a positioning rod (13) that is movably inserted into the through hole (12). The positioning rod (13) is selectively inserted into the first slot (10) or the second slot (11) to fix the table body (3) in an unfolded or folded state.

5. A sliding rail type foldable ping-pong table according to claim 4, characterized in that, A magnetic sheet (18) is embedded inside the through hole (12), and the positioning rod (13) is a metal rod. The magnetic sheet (18) is used to help fix the positioning rod (13) inserted into the through hole (12).

6. A sliding rail type foldable ping-pong table according to claim 3, characterized in that, The negative pressure assembly (19) includes a sealing ring (20) embedded in the upper edge of the inner side of the placement groove (15) and the placement hole (16), a racket body (101) inserted in the placement groove (15) and a ball (102) inserted in the placement hole (16) abutting against the sealing ring (20).

7. A sliding rail type foldable ping-pong table according to claim 6, characterized in that, The negative pressure assembly (19) also includes a cavity tube (21) disposed inside the side plate (14), the cavity tube (21) being connected to the placement hole (16) and the placement groove (15) above.

8. A sliding rail type foldable ping-pong table according to claim 7, characterized in that, The negative pressure assembly (19) also includes a sliding rod (22) slidably installed in the cavity tube (21), and a rubber ring (23) is embedded on the outer ring surface of the upper end of the sliding rod (22), and the rubber ring (23) is interference-fitted with the cavity tube (21).

9. A sliding rail type foldable ping-pong table according to claim 8, characterized in that, The sliding positioning assembly includes a protrusion (24) on the side of the sleeve (9) facing the side plate (14), and the side plate (14) is provided with a vertical guide groove (25) corresponding to the protrusion (24). The protrusion (24) is inserted into the guide groove (25) and is located directly below the sliding rod (22).

10. A sliding rail type foldable ping-pong table according to claim 9, characterized in that, A traction belt (26) is fixedly installed between the sliding positioning component and the negative pressure component (19). When the table body (3) is folded and the sliding positioning component slides down, the traction belt (26) pulls the sliding rod (22) down, so that negative pressure is formed inside the cavity tube (21), the placement hole (16), and the placement groove (15), which adsorbs the ball (102) and the racket body (101) under negative pressure. When the table body (3) is unfolded and the sliding positioning component moves upward, the protrusion (24) pushes the sliding rod (22) upward, releasing the negative pressure inside the cavity tube (21), the placement hole (16), and the placement groove (15), and releasing the adsorption on the ball (102) and the racket body (101); The net assembly is fixedly mounted on the support rod (27) inside the side plate (14) by bolts, and the net (17) is fitted between the two support rods (27).

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