A table leg foldable support structure

Abstract

This utility model provides a foldable table leg support structure, including two support legs, a first support rod and a second support rod located between the two support legs, arranged in an X-shape. The first support rod includes a first branch rod and a second branch rod, and the second support rod includes a third branch rod and a fourth branch rod. The first and second branch rods are both hinged to the support legs, and the first and second branch rods are hinged to each other via a first pin. The first branch rod has a limiting member that abuts against the outer wall of the second branch rod. The third and fourth branch rods are both hinged to the support legs, and the third and fourth branch rods are hinged to each other via a second pin. The fourth branch rod has a locking member for fastening to the third branch rod. The second and fourth branch rods are hinged to each other via a third pin. The first and second pins are simultaneously located above or below the third pin. This achieves the effect of foldability and stable support for the table panel.

Description

Technical Field

[0001] This utility model relates to folding tables, and more particularly to a foldable support structure for table legs. Background Technology

[0002] Currently, Chinese patent CN207666240U discloses a simple foldable table, including support legs, a panel, and a locking structure. The support legs include a vertical support leg and a horizontal support leg. The vertical support leg is set perpendicular to the ground, and the horizontal support leg is located directly below the panel, with one end of the horizontal support leg hinged to the lower end of the vertical support leg. The panel is hinged to the upper end of the vertical support leg. The locking structure includes a diagonal brace A and a diagonal brace B. Slider A and slider B are arranged sequentially from top to bottom on the vertical support leg.

[0003] The structure is relatively simple, as it is fixed by setting diagonal braces between the horizontal and vertical support legs and between the panel and the vertical support legs.

[0004] The vertical support legs consist of two vertically arranged hollow tubes. Because there is no connecting element between the two hollow tubes, this lack of lateral restraint makes the hollow tubes prone to relative swaying or tilting when the tabletop is subjected to load or lateral thrust, resulting in a "tilting" phenomenon and causing the table to be unstable and wobble. Therefore, to maintain better stability, one or more crossbeams need to be fixed between the two hollow tubes. This prevents the table from folding down, and a non-foldable table occupies a significant amount of storage space and is difficult to store when not in use, causing inconvenience to the user. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a foldable table leg support structure, so as to achieve the purpose of folding and enabling the table to have good stability.

[0006] To solve the aforementioned technical problems, the technical solution of this utility model is: a foldable table leg support structure, comprising two support legs, and a first support rod and a second support rod located between the two support legs. The first and second support rods are arranged in an X-shape. The first support rod includes a first branch rod and a second branch rod, and the second support rod includes a third branch rod and a fourth branch rod. The first and second branch rods are both hinged to their corresponding support legs. The first and second branch rods are hinged together by a first pin. The first branch rod has a limiting member that abuts against the outer wall of the second branch rod.

[0007] The third and fourth branch rods are both hinged to their corresponding support legs. The third and fourth branch rods are hinged together by a second pin. The fourth branch rod is connected to a locking piece for fastening onto the third branch rod. The second and fourth branch rods are hinged together by a third pin.

[0008] The first and second pins are both located above or below the third pin.

[0009] To achieve the above technical solution, an outward separating driving force is applied to the support leg, causing the first and second sub-rods to rotate forward around their respective hinge points with the support leg, while simultaneously rotating relative to each other at their hinge points. The third and fourth sub-rods also rotate forward. The second and fourth sub-rods rotate forward at their interconnecting hinge points. During this unfolding process, the limiting piece on the first sub-rod eventually contacts the outer wall of the second sub-rod, thereby limiting the maximum unfolding angle between the first and second sub-rods, allowing the support leg to reach a fully unfolded state. Simultaneously, the locking piece on the fourth sub-rod engages with the third sub-rod, locking the support leg in the unfolded state. At this time, the first and second support rods are arranged in an X-shape, giving the table strong structural stability. Releasing the locking piece from the third sub-rod and applying an inward driving force to the support leg causes the first and second support rods to fold. Specifically, the first and second segments rotate in opposite directions at their hinge points and at their hinge points with the support legs, while the third and fourth segments also rotate in opposite directions. The second and fourth segments pivot in opposite directions at their hinge points. During this folding process, the first, second, third, and fourth segments move closer to each other, gradually reducing in volume until a compact folded state is achieved.

[0010] In a preferred embodiment of this utility model, the first pin and the second pin are both located above the third pin.

[0011] To achieve the above technical solution, the locking mechanism is positioned at an easily accessible height relative to the ground, effectively aligning with users' daily operating habits. Compared to unlocking methods that require pressing or pushing the locking mechanism downwards in an unnatural posture, the upward pulling operation is more effortless and direct, especially when storing while standing or slightly bent over. This significantly reduces the user's physical burden and improves operational convenience and efficiency. It also makes the folding and unfolding process smoother and more comfortable, enhancing usability.

[0012] As a preferred embodiment of this utility model, the side of the second branch rod facing away from the third branch rod is provided with an arc-shaped protrusion.

[0013] To achieve the above technical solution, the arc-shaped protrusion enhances the second sub-branch's ability to resist bending, torsion, and local buckling by adding material to the second sub-branch, thereby strengthening the structural strength and stability of the second sub-branch itself.

[0014] As a preferred embodiment of the present invention, the arc-shaped protrusion includes an integrally formed first protrusion and a second protrusion. The thickness of the first protrusion gradually increases in the direction away from the first branch rod, and the thickness of the second protrusion gradually decreases in the direction closer to the support foot.

[0015] The above technical solution optimizes the material utilization efficiency and stress distribution of the second sub-branch. By placing the arc-shaped protrusions in more critical stress locations, the local structural strength and bending and torsional resistance of the second sub-branch are significantly improved. The gradual thickening of the first protrusion forms a transitional region with gradually increasing strength, which helps to disperse stress.

[0016] In a preferred embodiment of this utility model, the engaging component includes a limiting plate, a fixing tube, and a pull plate. The pull plate and the fixing tube are both connected to the limiting plate. The fourth branch rod is positioned in the fixing tube. A positioning area is formed between the limiting plate and the fixing tube. The third branch rod is fastened and connected in the positioning area.

[0017] By implementing the above technical solution, during the deployment of the support leg, the third segment can accurately and smoothly enter the positioning area between the limiting plate and the fixed tube and achieve a reliable fastening connection. This process achieves accurate and stable locking in the deployed state, significantly improving the overall stability of the structure and effectively preventing accidental folding. During folding, the fastening can be easily released by lifting the pull plate upwards, allowing the third segment to disengage from the positioning area, thus achieving a quick and effortless unlocking process, enabling the support leg to be smoothly retracted.

[0018] As a preferred embodiment of this utility model, a limiting rod for abutting against the outer wall of the fourth sub-rod is fixed on the inner wall of the fixing tube, and a guide slope is provided at one end of the limiting rod facing the opening of the positioning tube.

[0019] To achieve the above technical solution, the limiting rod, by pressing against the outer wall of the fourth sub-rod, effectively eliminates any gaps or looseness that may exist inside the fixed tube, greatly improving the positioning accuracy and stability of the fourth sub-rod within the fixed tube. The guide ramp serves as an inlet surface, facilitating smoother movement of the fourth sub-rod within the fixed tube and preventing jamming or impact.

[0020] In a preferred embodiment of this utility model, the pull plate is U-shaped, with both ends of the pull plate fixed to the limiting plate, and a through groove is formed between the pull plate and the limiting plate.

[0021] To achieve the above technical solution, the U-shaped pull plate provides an ergonomic gripping area. The groove formed between the pull plate and the limiting plate facilitates the user's fingers to insert and pull upwards, greatly improving the convenience and comfort of operation. The prominent design of the U-shaped pull plate also clearly indicates the position for the user to perform the unlocking operation, improving the product's usability.

[0022] As a preferred embodiment of this utility model, a connecting inclined surface is provided on the side wall of the pull plate, and the edge of the connecting inclined surface has an arc-shaped surface.

[0023] To achieve the above technical solution, the side wall design of the pull plate optimizes the grip comfort.

[0024] In a preferred embodiment of this utility model, the limiting member is integrally connected to the first branch rod, and the cross-section of the limiting member is U-shaped.

[0025] The above technical solution facilitates the processing and production of the limiting component and the first branch rod, while also making the connection between the limiting component and the second branch rod tighter. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the unfolded structure of the support legs;

[0027] Figure 2 for Figure 1 Enlarged view of point A;

[0028] Figure 3 To illustrate the structural diagram of the first branch;

[0029] Figure 4 for Figure 3 Enlarged view of point B;

[0030] Figure 5 This is a schematic diagram of the support leg folding structure;

[0031] Figure 6 A three-dimensional schematic diagram of the supporting leg folding structure;

[0032] Figure 7 This is a schematic diagram illustrating the position of the limit rod;

[0033] Figure 8 To illustrate the structure of the limiting plate;

[0034] Figure 9 This is a schematic diagram of the second branch rod.

[0035] Reference numerals: 1. Support leg; 2. First upright; 3. Second upright; 4. First horizontal plate; 5. Second horizontal plate; 6. First support rod; 7. First branch rod; 8. Second branch rod; 9. Second support rod; 10. Third branch rod; 11. Fourth branch rod; 12. First hinge; 13. Second hinge; 14. First pin; 15. Limiting component; 16. Third hinge; 17. Fourth hinge; 18. Second pin; 19. Third pin; 20. Arc-shaped protrusion; 21. First convex part; 22. Second convex part; 23. Engaging component; 24. Limiting plate; 25. Fixing tube; 26. Pull plate; 27. Limiting rod; 28. Guide slope; 29. ​​Connecting slope; 30. Arc-shaped surface; 31. Through groove; 32. Positioning area. Detailed Implementation

[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0037] A foldable table leg support structure includes two support legs 1 for supporting the tabletop. One support leg 1 includes a first upright 2 and a first horizontal plate 4, and the other support leg 1 includes a second upright 3 and a second horizontal plate 5. The lower end of the first upright 2 is fixed to the upper surface of the first horizontal plate 4, and the lower end of the second upright 3 is fixed to the upper surface of the second horizontal plate 5. The first upright 2 and the second upright 3 are arranged in parallel. The first horizontal plate 4 and the second horizontal plate 5 are placed horizontally on the ground. The tabletop (not shown) is supported by the first upright 2 and the second upright 3.

[0038] The first support rod 6 and the second support rod 9 are arranged in an X-shape between the first upright rod 2 and the second upright rod 3. The first support rod 6 includes a first branch rod 7 and a second branch rod 8, both of which have U-shaped cross-sections. The second support rod 9 includes a third branch rod 10 and two fourth branch rods 11, where the third branch rod 10 has a U-shaped cross-section and the fourth branch rods 11 are cylindrical. The axes of the two fourth branch rods 11 are parallel.

[0039] One end of the first branch rod 7 is hinged to the inner wall of the first upright rod 2, which is the first hinge point 12. One end of the second branch rod 8 is hinged to the inner wall of the second upright rod 3, which is the second hinge point 13. The end of the second branch rod 8 is hinged to the first branch rod 7 via a first pin 14. The first branch rod 7 has a limiting member 15 that abuts against the outer wall of the second branch rod 8. The limiting member 15 is integrally connected to the first branch rod 7, and the cross-section of the limiting member 15 is U-shaped.

[0040] One end of the third branch rod 10 is hinged to the inner wall of the second upright rod 3, which is the third hinge point 16. One end of the fourth branch rod 11 is hinged to the inner wall of the first upright rod 2, which is the fourth hinge point 17. The end of the third branch rod 10 is hinged to the fourth branch rod 11 via the second pin 18. A locking piece 23 for fastening the fourth branch rod 11 to the third branch rod 10 is connected to the end of the fourth branch rod 11. The second branch rod 8 is hinged to the fourth branch rod 11 via the third pin 19, and the second branch rod 8 passes between the two fourth branch rods 11.

[0041] The perpendicular distance between the axis of the first pin 14 and the axis of the third pin 19 is equal to the perpendicular distance between the axis of the second pin 18 and the axis of the third pin 19.

[0042] The vertical distance from the axis of the first hinge 12 to the axis of the first pin 14 is equal to the vertical distance from the axis of the third hinge 16 to the axis of the second pin 18.

[0043] The vertical distance from the axis of the second hinge 13 to the axis of the first pin 14 is equal to the vertical distance from the axis of the fourth hinge 17 to the axis of the second pin 18.

[0044] The panel is located above the first support rod 6 and the second support rod 9. The vertical height difference between the first pin 14 and the third pin 19 has the same positive or negative sign as the vertical height difference between the second pin 18 and the third pin 19. That is, both the first pin 14 and the second pin 18 are located on the side of the third pin 19 facing the panel, or both the first pin 14 and the second pin 18 are located on the side of the third pin 19 away from the panel.

[0045] In this embodiment, a technical solution is adopted in which both the first pin 14 and the second pin 18 are located on the side of the third pin 19 facing the panel.

[0046] The second branch pole 8 has an arc-shaped protrusion 20 on the side opposite to the third branch pole 10. The arc-shaped protrusion 20 includes an integrally formed first protrusion 21 and a second protrusion 22. The thickness of the first protrusion 21 gradually increases in the direction away from the first branch pole 7. The thickness of the second protrusion 22 gradually decreases in the direction closer to the second upright pole 3, near the end of the second branch pole 8 away from the first branch pole 7.

[0047] The engaging component 23 includes a limiting plate 24, a fixing tube 25, and a pull plate 26. The pull plate 26 and the fixing tube 25 are both connected to the limiting plate 24, wherein the pull plate 26 is located on the upper surface of the limiting plate 24, and there are two fixing tubes 25 located on the lower surface of the limiting plate 24.

[0048] Multiple limiting rods 27 are fixed on the inner wall of the fixed tube 25, with the length direction of the limiting rods 27 parallel to the axial direction of the fixed tube 25. The multiple limiting rods 27 are distributed along the axis of the fixed tube 25. A guide slope 28 is provided at the end of the limiting rod 27 facing the opening of the positioning tube. The end of the fourth branch rod 11 is inserted into the fixed tube 25, and the fourth branch rod 11 abuts against the limiting rod 27 along the guide slope 28. Through the action of friction, a fixed connection is achieved between the fourth branch rod 11 and the fixed tube 25.

[0049] A positioning area 32 is formed between the limiting plate 24 and the two fixing tubes 25. By moving the limiting plate 24 downward, the third branch rod 10 can be fastened and connected in the positioning area 32. The outer wall of the fixing tube 25 abuts against the third branch rod 10.

[0050] The pull plate 26 is U-shaped, and both ends of the pull plate 26 are fixed to the limiting plate 24, forming a through groove 31 between the pull plate 26 and the limiting plate 24.

[0051] A connecting inclined surface 29 is provided on the side wall of the pull plate 26, and the edge of the connecting inclined surface 29 has an arc-shaped surface 30.

[0052] The unfolding process is as follows: The user applies an outward separating force to the first upright 2 and the second upright 3, causing them to move away from each other. During this process, the first branch 7, connected to the inner wall of the first upright 2, rotates around its hinge point, and the second branch 8, connected to the inner wall of the second upright 3, rotates around its hinge point. Simultaneously, the third branch 10, connected to the inner wall of the second upright 3, rotates around its hinge point, and the two fourth branch 11s, connected to the inner wall of the first upright 2, rotate around their respective hinge points.

[0053] The first branch rod 7 and the second branch rod 8 rotate relative to each other via the first pin 14, and the third branch rod 10 and the fourth branch rod 11 rotate relative to each other via the second pin 18. The second branch rod 8 and the fourth branch rod 11 rotate relative to each other via the third pin 19.

[0054] As the first upright 2 and the second upright 3 continue to separate, the first support rod 6 and the second support rod 9 gradually open up in an X-shape arrangement.

[0055] The user moves the limiting plate 24 of the locking piece 23 downwards, so that the positioning area 32 formed between the limiting plate 24 and the two fixing tubes 25 can be fastened to the third branch rod 10. At this time, the outer wall of the fixing tube 25 abuts against the third branch rod 10, completing the locking of the locking piece 23. At the same time, the limiting piece 15 on the first branch rod 7 abuts against the outer wall of the second branch rod 8, limiting the unfolding angle between the first branch rod 7 and the second branch rod 8. At this time, the support leg 1 reaches the fully unfolded state, and the structure of the support leg 1 is stable.

[0056] The folding process is as follows: Pulling up the pull plate 26 moves the limiting plate 24 and the two fixing tubes 25 upward. As the limiting plate 24 and its connected fixing tubes 25 move upward, the third branch rod 10 disengages from the positioning area 32 formed by the limiting plate 24 and the two fixing tubes 25, thus releasing the fastening connection between the third branch rod 10 and the positioning area 32.

[0057] After the lock is released, the user applies an inward force to the first upright 2 and the second upright 3, causing them to move closer to each other.

[0058] The first branch rod 7, the second branch rod 8, the third branch rod 10, and the fourth branch rod 11 rotate at the first hinge 12, the second hinge 13, the third hinge 16, the fourth hinge 17, and the first pin 14, the second pin 18, and the third pin 19. The structural volume gradually decreases. The movement continues until the first upright rod 2 and the second upright rod 3 approach each other to a folded state, completing the folding process.

[0059] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A table leg foldable support structure, comprising two support legs (1), characterized in that: It also includes a first support rod (6) and a second support rod (9) located between the two support legs (1). The first support rod (6) and the second support rod (9) are arranged in an X-shape. The first support rod (6) includes a first branch rod (7) and a second branch rod (8). The second support rod (9) includes a third branch rod (10) and a fourth branch rod (11). The first branch rod (7) and the second branch rod (8) are both hinged to the corresponding support legs (1). The first branch rod (7) and the second branch rod (8) are hinged by a first pin (14). The first branch rod (7) has a limiting member (15) that abuts against the outer wall of the second branch rod (8). The third branch rod (10) and the fourth branch rod (11) are both hinged to the corresponding support foot (1). The third branch rod (10) and the fourth branch rod (11) are hinged through the second pin (18). The fourth branch rod (11) is connected to a snap-fit ​​piece (23) for fastening to the third branch rod (10). The second branch rod (8) and the fourth branch rod (11) are hinged through the third pin (19). The first pin (14) and the second pin (18) are both located above the third pin (19) or both located below the third pin (19).

2. The table leg foldable support structure according to claim 1, characterized in that: The first pin (14) and the second pin (18) are both located above the third pin (19).

3. The table leg foldable support structure according to claim 2, characterized in that: The second sub-bar (8) has an arc-shaped protrusion (20) on the side opposite to the third sub-bar (10).

4. The table leg foldable support structure according to claim 3, characterized in that: The arc-shaped protrusion (20) includes an integrally formed first protrusion (21) and a second protrusion (22). The thickness of the first protrusion (21) gradually increases in the direction away from the first branch rod (7), and the second protrusion (22) is close to the support foot (1). The thickness of the second protrusion (22) gradually decreases in the direction close to the support foot (1).

5. A table leg folding support structure according to any one of claims 1-4, characterized in that: The engaging component (23) includes a limiting plate (24), a fixing tube (25), and a pull plate (26). The pull plate (26) and the fixing tube (25) are both connected to the limiting plate (24). The fourth branch rod (11) is positioned in the fixing tube (25). A positioning area (32) is formed between the limiting plate (24) and the fixing tube (25). The third branch rod (10) is fastened and connected in the positioning area (32).

6. The table leg foldable support structure according to claim 5, characterized in that: The inner wall of the fixed tube (25) is fixed with a limiting rod (27) for abutting against the outer wall of the fourth sub-rod (11). The limiting rod (27) has a guide slope (28) at one end facing the opening of the positioning tube.

7. The table leg foldable support structure according to claim 5, characterized in that: The pull plate (26) is U-shaped, and both ends of the pull plate (26) are fixed to the limiting plate (24). A through groove (31) is formed between the pull plate (26) and the limiting plate (24).

8. The table leg foldable support structure according to claim 7, characterized in that: The pull plate (26) has a connecting inclined surface (29) on its side wall, and the edge of the connecting inclined surface (29) has an arc-shaped surface (30).

9. The table leg foldable support structure according to claim 1, characterized in that: The limiting member (15) is integrally connected to the first branch rod (7), and the cross-section of the limiting member (15) is U-shaped.

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