Multi-functional small table board for rail transit

Abstract

The application discloses a multifunctional small table plate for rail transit, and relates to the technical field of high-speed rail equipment.The multifunctional small table plate comprises a support plate, a driving motor, a threaded rod, a threaded sleeve, a main table plate, a sub table plate and an intermittent control assembly.The driving motor drives the threaded sleeve to move, and the main table plate is driven to rotate and unfold around the connecting support through the first connecting rod.The sub table plate can be slidably accommodated in the main table plate and is pulled outwards when it needs to be extended.The key lies in the intermittent control assembly: during the pulling process of the sub table plate, the linkage mechanism drives the control rod to move downwards, the triangular chuck head is made to pass over and hook the control push head to realize automatic segmented locking, external force or bumping is effectively prevented from causing retraction, and the use stability is ensured;when the sub table plate is retracted, the L-shaped connecting rod needs to be slightly pulled to trigger the unlocking mechanism to make the L-shaped connecting rod separate from the control groove, and then the sub table plate can be smoothly pushed back.The multifunctional small table plate realizes one-key unfolding of the main table plate, flexible length adjustment and reliable self-locking of the sub table plate, has compact structure, safe and convenient operation, and is particularly suitable for the rail transit environment.

Description

Technical Field

[0001] This invention relates to the field of high-speed rail equipment technology, specifically a multi-functional small table for rail transit. Background Technology

[0002] In rail transit (such as high-speed rail, subway, and train) carriages, foldable tray tables installed behind seats are an important facility providing convenience for passengers, used for placing items, eating, or working. However, such tray tables in the existing technology generally have the following significant drawbacks:

[0003] 1. Limited functionality and fixed size: Most small tables are single, fixed-size panels whose area cannot be adjusted after unfolding. When passengers need to place many items, use large electronic devices, or share meals with multiple people, fixed-size tables often lack sufficient space and cannot meet diverse usage needs.

[0004] 2. Poor stability of extendable tables: A few small tables with extendable functions typically use a simple pull-out or folding structure for their secondary tabletops. During train operation, especially during bumps, braking, or turns, these structures are prone to unexpected retraction or sliding due to external forces or inertia, causing items placed on the tabletop to slip or even be damaged, posing a safety hazard and resulting in a poor user experience.

[0005] 3. The conflict between space utilization and structure: Within the limited space of the carriage, the small table needs to be stored as compactly as possible when not in use, while providing sufficient and stable usable area when unfolded. Existing designs often struggle to balance these two aspects, especially after adding extension functions, which can easily lead to a complex and cumbersome structure or a decrease in reliability.

[0006] Therefore, the present invention provides a multifunctional small table for rail transit to solve one or more of the above-mentioned problems. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this invention provides a multifunctional small table for rail transit, thereby solving the problems mentioned in the background section.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solution, including: a support plate, a drive motor mounted on the support plate, a threaded rod provided on the output shaft of the drive motor, a threaded sleeve sleeved on the outer wall of the threaded rod, a main table plate mounted on the support plate through a connecting support, the threaded sleeve and the main table plate being connected through a first connecting rod, and a secondary table plate being movably disposed within the main table plate through an intermittent control component.

[0011] Preferably, two sets of fixing blocks are fixedly connected to the bracket plate, and one end of the threaded rod is rotatably connected to one set of fixing blocks, while the other end of the threaded rod is fixedly connected to the output shaft of the drive motor. The output shaft of the drive motor moves through the fixing block at the bottom.

[0012] Preferably, a support roller is installed on the side of the threaded sleeve near the support plate, one end of the first connecting rod is hinged to the main table plate, and the other end of the first connecting rod is hinged to the threaded sleeve.

[0013] Preferably, one end of the connecting support is fixedly connected to the support plate, and the other end of the connecting support is hinged to the main table panel.

[0014] Preferably, the bottom of the inner wall of the main table is provided with several sets of control slots at equal intervals, the bottom of the secondary table is fixedly provided with a base plate, and an avoidance slot is left between the bottom of the base plate and the bottom of the inner wall of the main table. The walking rollers are installed on the outer wall of the secondary table via a drive shaft.

[0015] Preferably, the intermittent control component includes: a drive gear, which is fixedly sleeved on the outer wall of the drive shaft on the side away from the traveling roller; two sets of fixed brackets are fixedly connected to the base plate; and a fixed plate is fixedly disposed between the two sets of fixed brackets.

[0016] Preferably, a first fixed bracket is provided with a first limiting guide groove and a second limiting guide groove, and a through hole is provided on a first fixed plate. A hinge seat is fixed on the side of one set of the first fixed brackets near the drive gear. The Z-shaped connecting rod is rotatably connected to the hinge seat. One end of the Z-shaped connecting rod meshes with the drive gear, and the other end of the Z-shaped connecting rod is located at the top of the pressure plate.

[0017] Preferably, a set of second connecting rods is slidably installed in each set of limiting guide grooves, and the control push head is fixedly connected to the end of the second connecting rod. A connecting spring is sleeved on the outer wall of the second connecting rod, and the two ends of the connecting spring are fixedly connected to the control push head and the fixed bracket, respectively.

[0018] Preferably, a U-shaped component 1 is fixedly provided at the bottom of the pressure plate, a fixing plate 2 is fixedly provided on the outer wall of the U-shaped component 2, the U-shaped component 1 is slidably provided on the U-shaped component 2, and the inner wall of the U-shaped component 1 and the U-shaped component 2 are connected by a connecting spring 2. Two sets of mounting grooves are symmetrically opened on the top of the fixing plate 1. One end of the connecting spring 3 is fixedly provided in the mounting groove, and the other end of the connecting spring 3 is fixedly connected to the fixing plate 2. One end of the control rod is fixedly connected to the bottom of the U-shaped component 2, and the other end of the control rod moves through the through hole. Two sets of triangular clips are symmetrically fixed at the end of the control rod that passes through the through hole. The horizontal section of the L-shaped connecting rod is rotatably connected to the front outer wall of the control rod. A cam follower is installed at the right-angle end of the bottom of the vertical section of the L-shaped connecting rod.

[0019] Preferably, the two ends of the third link are respectively movably disposed in two sets of limiting guide grooves, the top of the third link extends upward symmetrically to form two sets of inclined push heads, one end of the connector is rotatably connected to the front side of the third link, the other end of the connector is movably provided with a rolling bearing, and a blocking block is fixedly provided on one side of the control rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] Driven by a motor, the main table can be smoothly unfolded with a single button, and the secondary table can be flexibly pulled out from within the main table to extend the usable area steplessly or in segments, greatly improving space adaptability and practicality. The specially designed pure mechanical self-locking mechanism can automatically and reliably lock the secondary table in multiple preset positions during the pulling process, effectively preventing accidental retraction due to external force or bumps during use and ensuring stability. At the same time, retracting the secondary table requires a specific unlocking operation (pulling slightly and then pushing), avoiding accidental operation and improving safety and user experience. The overall structure is compact, sturdy and durable, making it very suitable for the high-frequency use needs of rail transit environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 This is a schematic diagram showing the installation location of the intermittent control component in this invention;

[0024] Figure 3 This is a schematic diagram of the main structure of the intermittent control component in this invention;

[0025] Figure 4 This is a three-dimensional structural diagram of a portion of the fixing bracket in this invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the third connecting rod in this invention;

[0027] Figure 6 This is a schematic diagram of the elevation structure of the secondary table panel in this invention;

[0028] Figure 7 This is a schematic diagram of the control lever control section in this invention.

[0029] In the diagram: 1. Support plate; 2. Drive motor; 3. Fixing block one; 4. Threaded sleeve; 5. Support roller; 6. Threaded rod; 7. First connecting rod; 8. Connecting support; 9. Main table; 10. Secondary table; 11. Intermittent control assembly; 12. Drive shaft; 13. Drive gear; 14. Traveling roller; 15. Control groove; 16. Fixing bracket one; 17. Hinge seat; 18. Z-shaped connecting rod; 19. Limiting guide groove one; 20. Limiting guide groove two; 21. Fixing plate one; 22. Through 23. Hole; 24. Control push head; 25. Second connecting rod; 26. Connecting spring one; 27. Mounting groove; 28. Pressure plate; 29. ​​U-shaped part one; 30. Fixing plate two; 31. Connecting spring two; 32. Connecting spring three; 33. U-shaped part two; 34. Control rod; 35. Triangular clamp; 36. L-shaped connecting rod; 37. Cam follower; 38. Third connecting rod; 39. Angled push head; 40. Connecting part; 41. Rolling bearing; 42. Clearance groove; 43. Base plate; 44. Block one. Detailed Implementation

[0030] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the invention. They are merely used to distinguish protective components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0031] Example 1

[0032] Please see Figures 1-2 The present invention provides a technical means comprising: a support plate 1, a drive motor 2 mounted on the support plate 1, a threaded rod 6 provided on the output shaft of the drive motor 2, a threaded sleeve 4 sleeved on the outer wall of the threaded rod 6, a main table 9 mounted on the support plate 1 through a connecting support 8, the threaded sleeve 4 being connected to the main table 9 through a first connecting rod 7, and a secondary table 10 being movably disposed within the main table 9 through an intermittent control component 11.

[0033] Preferably, the two sets of fixing blocks 3 are fixedly connected to the bracket plate 1, and one end of the threaded rod 6 is rotatably connected to one of the fixing blocks 3, and the other end of the threaded rod 6 is fixedly connected to the output shaft of the drive motor 2. The output shaft of the drive motor 2 moves through the fixing block 3 at the bottom.

[0034] Preferably, a support roller 5 is installed on the side of the threaded sleeve 4 near the support plate 1, one end of the first connecting rod 7 is hinged to the main table plate 9, and the other end of the first connecting rod 7 is hinged to the threaded sleeve 4.

[0035] Preferably, one end of the connecting support 8 is fixedly connected to the support plate 1, and the other end of the connecting support 8 is hinged to the main table plate 9.

[0036] Preferably, the bottom of the inner wall of the main table panel 9 is provided with several sets of control slots 15 at equal intervals, the bottom of the secondary table panel 10 is fixedly provided with a base plate 42, and an avoidance slot 41 is left between the bottom of the base plate 42 and the bottom of the inner wall of the main table panel 9. The walking rollers 14 are installed on the outer wall of the secondary table panel 10 through the drive shaft 12.

[0037] The working principle and beneficial effects of the above scheme are as follows: When in use, the drive motor 2 is started to drive the threaded sleeve 4 to move along the threaded rod 6, thereby driving the main table 9 to rotate around the end of the connecting support 8 through the first connecting rod 7, so that the main table 9 can be opened for use. When the length of the table is too short, the table can be extended by pulling the auxiliary table 10 out of the main table 9. The intermittent control component 11 ensures that the auxiliary table 10 will not retract when it is pulled out of the main table 9.

[0038] This invention utilizes a drive motor to activate a threaded rod-threaded sleeve mechanism, which, in conjunction with a first connecting rod and a hinged connecting support, enables the smooth and automatic unfolding of the main table. This simplifies operation and reduces manual steps for passengers. The main table features a retractable secondary table embedded within it, allowing for flexible extension of the table's usable area based on actual needs (e.g., dining, working, or placing items). This significantly enhances the applicability and practicality of the secondary table, solving the problem of insufficient space in traditional fixed-length tables. The secondary table is stored within the main table, resulting in a compact overall structure when the main table is folded, effectively saving space and meeting the stringent space utilization requirements of rail transit. The unique intermittent control component (core of Embodiment 2) automatically and reliably locks the secondary table in multiple preset positions during its outward extension. This locking is a purely mechanical self-locking mechanism, requiring no additional operation or electrical maintenance.

[0039] This invention, through an innovative motor-driven main table unfolding system and a purely mechanical intermittent self-locking control system for the extension of the auxiliary table, successfully achieves core advantages for rail transit tabletops, including one-button unfolding, stepless / segmented length adjustment, reliable self-locking to prevent backlash, safe operation to prevent accidental touches, and a compact and durable structure. This significantly improves passenger convenience, comfort, and safety, while meeting the stringent requirements of rail transit equipment for reliability, space utilization, and ease of maintenance. Its purely mechanical self-locking mechanism is a prominent highlight of this solution in terms of stability, durability, and anti-interference capabilities.

[0040] Example 2

[0041] Based on Example 1, please refer to Figures 3-7 The intermittent control component 11 includes: a drive gear 13, which is fixedly sleeved on the outer wall of the drive shaft 12 on the side away from the traveling roller 14; two sets of fixed brackets 16 are fixedly connected to the base plate 42; and a fixed plate 21 is fixedly disposed between the two sets of fixed brackets 16.

[0042] Preferably, a limiting guide groove 19 and a limiting guide groove 20 are provided on the fixed bracket 16, and a through hole 22 is provided on the fixed plate 21. A hinge seat 17 is fixed on one side of the fixed bracket 16 near the drive gear 13. A Z-shaped connecting rod 18 is rotatably connected to the hinge seat 17. One end of the Z-shaped connecting rod 18 is engaged with the drive gear 13, and the other end of the Z-shaped connecting rod 18 is located on the top of the pressure plate 27.

[0043] Preferably, a set of second connecting rods 24 are slidably installed in each set of limiting guide grooves 20, and the control push head 23 is fixedly connected to the end of the second connecting rod 24. The connecting spring 25 is sleeved on the outer wall of the second connecting rod 24, and the two ends of the connecting spring 25 are fixedly connected to the control push head 23 and the fixed bracket 16 respectively.

[0044] Preferably, a U-shaped part 28 is fixedly provided at the bottom of the pressure plate 27, and a fixing plate 29 is fixedly provided on the outer wall of the U-shaped part 32. The U-shaped part 28 is slidably provided on the U-shaped part 32, and the U-shaped part 28 and the inner wall of the U-shaped part 32 are connected by a connecting spring 20. Two sets of mounting grooves 26 are symmetrically provided on the top of the fixing plate 21. One end of the connecting spring 31 is fixedly provided in the mounting groove 26, and the other end of the connecting spring 31 is fixedly connected to the fixing plate 29. One end of the control rod 33 is fixedly connected to the bottom of the U-shaped part 32, and the other end of the control rod 33 moves through the through hole 22. Two sets of triangular clips 34 are symmetrically fixed at the end of the control rod 33 that passes through the through hole 22. The horizontal section of the L-shaped connecting rod 35 is rotatably connected to the front outer wall of the control rod 33. A cam follower 36 is installed at the right-angle end of the vertical section of the L-shaped connecting rod 35.

[0045] Preferably, the two ends of the third link 37 are respectively movably disposed in two sets of limiting guide grooves 19, the top of the third link 37 extends upward symmetrically to form two sets of inclined push heads 38, one end of the connector 39 is rotatably connected to the front side of the third link 37, the other end of the connector 39 is movably provided with a rolling bearing 40, and a blocking block 43 is fixedly provided on one side of the control rod 33.

[0046] The working principle and beneficial effects of the above scheme are as follows: In use, the L-shaped connecting rod 35 and the connecting piece 39 are initially located in the control groove 15. By pulling the sub-table 10 outward, the L-shaped connecting rod 35 and the connecting piece 39 move within the control groove 15. At the same time, the traveling roller 14 rotates and drives the drive gear 13 to rotate clockwise through the drive shaft 12. This causes the Z-shaped connecting rod 18 to rotate counterclockwise around the hinge seat 17. The end of the Z-shaped connecting rod 18 near the pressure plate 27 presses the pressure plate 27 down, further causing the U-shaped part 1 28 to move down along the U-shaped part 2 32 while the connecting spring 2 30 is compressed and further compressed through the U-shaped part 2 32. 32 pushes the control lever 33 downward. During this process, the triangular locking head 34 will first push the control push head 23 in a direction away from each other and compress the connecting spring 25 until the triangular locking head 34 passes the control push head 23. Then the control push head 23 is no longer blocked and resets under the push of the connecting spring 25. During this process, if the L-shaped connecting rod 35 and the connecting piece 39 are located in the control groove 15, the triangular locking head 34 cannot pass the control push head 23 due to the "hook" setting of the control push head 23. As a result, the Z-shaped connecting rod 18 cannot return to its original position after pressing down the control lever 33, but this does not affect the continued outward extension of the sub-table 10.

[0047] When the secondary table 10 is adjusted to the required length (i.e., after moving a distance equal to the distance of several control slots 15), the intermittent control component 11 will be in a self-locking state. At this time, the L-shaped connecting rod 35 and the connecting piece 39 are located within the moved control slot 15, and the secondary table 10 cannot be retracted. This is because if the secondary table 10 is pushed back directly, since the L-shaped connecting rod 35 is currently within the control slot 15, and the Z-shaped connecting rod 18 will rotate counterclockwise, it will no longer press against the pressure plate 27, and the triangular locking head 34 will be without... When the lever passes the control push head 23, the triangular locking head 34 tightly engages the control push head 23 (under the action of the connecting spring 31), forcing the control lever 33 to not reset. Consequently, the L-shaped connecting rod 35 impacts the left side of the inner wall of the current control slot 15. Due to the presence of the blocking block 43, the L-shaped connecting rod 35 can only rotate clockwise and cannot rotate counterclockwise, preventing the sub-table 10 from moving backward. This restricts the sub-table 10 to its current position and prevents it from randomly changing its position.

[0048] When the auxiliary table 10 needs to be completely retracted, it needs to be slowly pulled forward slightly so that the rolling bearing 40 touches the right side of the inner wall of the current control slot 15. The connecting piece 39 is pushed upward and the third link 37 also moves upward. The two sets of inclined push heads 38 push the two sets of control push heads 23 in a direction away from each other. At the same time that the cam follower 36 touches the right side of the inner wall of the current control slot 15, the control rod 33 is pushed past the two sets of control push heads 23. At this time, the L-shaped link 35 disengages from the current control slot 15 and will not fall back and detach from the current control slot 15 due to the obstruction of the two sets of control push heads 23. Therefore, when the auxiliary table 10 retracts, the L-shaped link 35 will no longer be blocked by the left side of the inner wall of the control slot 15, and the auxiliary table 10 can be directly pushed back to its original position.

[0049] In the locked state, the secondary table cannot be pushed back directly, effectively preventing accidental retraction of the table due to passenger leaning, object collision, or vehicle bumps, greatly improving stability and safety. Completely retracting the secondary table requires a specific "slight pull followed by push" operation (triggering the angled push head, controlling the push head separation, and the L-shaped linkage disengaging from the slot). This design effectively avoids the secondary table suddenly retracting due to passenger misoperation during normal use, improving the user experience.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A multi-functional small table for rail transit, characterized in that, include: A support plate (1) and a drive motor (2) are mounted on the support plate (1). A threaded rod (6) is provided on the output shaft of the drive motor (2). A threaded sleeve (4) is fitted onto the outer wall of the threaded rod (6). The main table (9) is mounted on the support plate (1) through a connecting support (8). The threaded sleeve (4) is connected to the main table (9) through a first connecting rod (7). The auxiliary table (10) is movably mounted inside the main table (9) through an intermittent control component (11). Several control slots (15) are evenly spaced at the bottom of the inner wall of the main table (9). A base plate (42) is fixedly installed at the bottom of the secondary table (10). An clearance slot (41) is left between the bottom of the base plate (42) and the bottom of the inner wall of the main table (9). The walking rollers (14) are installed on the outer wall of the secondary table (10) through the drive shaft (12). The intermittent control assembly (11) includes: a drive gear (13), which is fixedly sleeved on the outer wall of the drive shaft (12) away from the traveling roller (14), two sets of fixed brackets (16) are fixedly connected to the base plate (42), and a fixed plate (21) is fixedly disposed between the two sets of fixed brackets (16).

2. The multifunctional small table for rail transit according to claim 1, characterized in that, Two sets of fixed blocks (3) are fixedly connected to the bracket plate (1), and one end of the threaded rod (6) is rotatably connected to one of the fixed blocks (3), and the other end of the threaded rod (6) is fixedly connected to the output shaft of the drive motor (2). The output shaft of the drive motor (2) moves through the fixed block (3) at the bottom.

3. The multifunctional small table for rail transit according to claim 1, characterized in that, A support roller (5) is installed on the side of the threaded sleeve (4) near the support plate (1). One end of the first connecting rod (7) is hinged to the main table plate (9), and the other end of the first connecting rod (7) is hinged to the threaded sleeve (4).

4. The multifunctional small table for rail transit according to claim 1, characterized in that, One end of the connecting support (8) is fixedly connected to the support plate (1), and the other end of the connecting support (8) is hinged to the main table plate (9).

5. A multifunctional small table for rail transit according to claim 1, characterized in that, The first fixed bracket (16) has a first limiting guide groove (19) and a second limiting guide groove (20). The first fixed plate (21) has a through hole (22). One set of the first fixed brackets (16) has a hinge seat (17) fixed on the side near the drive gear (13). The Z-shaped connecting rod (18) is rotatably connected to the hinge seat (17). One end of the Z-shaped connecting rod (18) meshes with the drive gear (13), and the other end of the Z-shaped connecting rod (18) is located on the top of the pressure plate (27).

6. A multifunctional small table for rail transit according to claim 5, characterized in that, Each set of limit guide grooves (20) has a set of second connecting rods (24) slidably installed inside, and the control push head (23) is fixedly connected to the end of the second connecting rod (24). The connecting spring (25) is sleeved on the outer wall of the second connecting rod (24), and the two ends of the connecting spring (25) are fixedly connected to the control push head (23) and the fixed bracket (16) respectively.

7. A multifunctional small table for rail transit according to claim 6, characterized in that, The bottom of the pressure plate (27) is fixedly provided with a U-shaped part one (28), and the outer wall of the U-shaped part two (32) is fixedly provided with a fixing plate two (29). The U-shaped part one (28) is slidably provided on the U-shaped part two (32), and the U-shaped part one (28) and the inner wall of the U-shaped part two (32) are connected by a connecting spring two (30). The top of the fixing plate one (21) is symmetrically provided with two sets of mounting grooves (26). One end of the connecting spring three (31) is fixedly provided in the mounting groove (26). 31) The other end is fixedly connected to the second fixed plate (29). One end of the control rod (33) is fixedly connected to the bottom of the second U-shaped part (32). The other end of the control rod (33) moves through the through hole (22). Two sets of triangular clips (34) are symmetrically fixed at one end of the control rod (33) that passes through the through hole (22). The horizontal section of the L-shaped connecting rod (35) is rotatably connected to the front outer wall of the control rod (33). A cam follower (36) is installed at the bottom right angle end of the vertical section of the L-shaped connecting rod (35).

8. A multifunctional small table for rail transit according to claim 6, characterized in that, The two ends of the third link (37) are respectively movably located in two sets of limiting guide grooves (19). The top of the third link (37) extends upward symmetrically to form two sets of inclined push heads (38). One end of the connector (39) is rotatably connected to the front side of the third link (37). The other end of the connector (39) is movably provided with a rolling bearing (40). A blocking block (43) is fixedly provided on one side of the control rod (33).

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