Folding table leg foot stretching, pressing and locking structure

Abstract

This utility model provides a folding table leg extension and locking structure, including an inner tube and an outer tube. The inner tube is fitted inside the outer tube and can slide axially along the inner cavity of the outer tube. A locking component is provided between the inner and outer tubes. The locking component enables locking and unlocking between the inner and outer tubes. It changes the original method of using a locking plate for locking and limiting. Instead, it uses an eccentric wheel to press and engage the locking block with a straight locking strip on the inner tube to lock the outer and inner tubes. By rotating the eccentric wheel, the locking block and the straight locking strip on the inner tube are separated and disengaged, thus unlocking the outer and inner tubes. This locking and unlocking connection method, which uses an eccentric pressure wheel to directly press the locking block with the straight locking strip fixed on the inner tube, can achieve fast locking and unlocking, with a stable lock and easy unlocking. It is convenient to operate and improves the convenience of adjusting the height of the folding table and the safety of use.

Description

Technical Field

[0001] This utility model belongs to the field of locking structure technology, specifically a folding table leg rack and pinion locking structure. Background Technology

[0002] Folding table legs are extendable folding legs used in conjunction with folding tabletops. However, existing telescopic structures for folding table legs have many defects. They generally use a single buckle and positioning hole for fixing. After long-term use, the buckle is prone to wear and loosening, which seriously affects the stability of the folding table and poses a safety hazard. Some structures also have few adjustment positions, making it impossible to flexibly adjust the height of the table legs according to different usage scenarios, and thus failing to meet the diverse needs of users.

[0003] Patent 202222383837.1 discloses a novel telescopic leg structure for a folding table, including a tabletop assembly, table legs installed below and movably connected to the tabletop assembly, the table legs including an inner tube and an outer tube that can extend and retract relative to each other, the inner tube and the outer tube being fitted with a leg fixing member, a button mounting member installed on the leg fixing member, and a push-down button installed in the button mounting member, the inner tube being fitted with a spring and a locking piece installed on the upper end of the spring, the push-down button abutting against the locking piece.

[0004] However, during the implementation of the relevant technology, it was found that the telescopic structure of the legs of the aforementioned new type of folding table relies solely on external locking plates to limit the inner tube. During the sliding process, the locking plates will rub against the surface of the inner tube and generate noise. Furthermore, with long-term use, wear will increase dramatically, and the locking plates will lose their limiting function. When heavy items are placed on the folding table, it will cause the tabletop to tilt. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a folding table leg extension and locking structure. It changes the original method of using locking plates for limiting movement, instead employing an eccentric wheel to engage with a straight locking strip on the inner tube. This connection method enables rapid locking and unlocking, with a secure lock and easy unlocking, convenient operation, and improved height adjustment convenience and safety of the folding table.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A folding table leg extension and locking structure includes an outer tube and an inner tube. The inner tube is fitted inside the cavity of the outer tube and can slide freely up and down relative to the outer tube. A straight locking strip is provided on the side wall of the inner tube, and a locking component is provided between the outer tube and the locking strip. When the locking component is in the locked state, the inner tube is in a locked state relative to the outer tube, and the inner tube and the outer tube cannot move. When the locking component is in the unlocked state, the inner tube can move linearly relative to the outer tube.

[0007] Furthermore, a strip-shaped groove is formed on the surface of the inner tube, and a locking strip is fixedly embedded in the strip-shaped groove. An inner clearance hole is provided on the outer tube. The locking component is an eccentric wheel press-locking structure, including a sleeve, an elastic locking block, and an eccentric wheel operating component. The sleeve is fixedly installed on the lower section of the outer tube, and an outer clearance hole is provided on the sleeve. One end of the elastic locking block is a connecting end, and the other end is a meshing end. The elastic locking block is fixed to the sleeve through the connecting end, and the meshing end of the elastic locking block is located in the outer clearance hole. The eccentric wheel operating component... One end is equipped with an eccentric pressure roller, and the other end is a handle. The eccentric roller control component is rotatably mounted on the sleeve. The outer arc surface of the eccentric pressure roller of the eccentric roller control component contacts the outer surface of the meshing end of the elastic locking block. When the meshing end of the elastic locking block is in the pressed state, the meshing end of the elastic locking block and the exposed surface of the locking strip are engaged and locked, and the locking strip is in the locked state. When the meshing end of the elastic locking block is in the unpressed state, the meshing end of the elastic locking block is separated from the exposed surface of the locking strip, and the locking strip is in the unlocked state.

[0008] Furthermore, the locking bar is a rack, and at least one toothed structure that meshes with the rack on the locking surface of the meshing end of the elastic locking block is provided.

[0009] Furthermore, a positioning pin is provided on the locking surface of the meshing end of the elastic locking block, and positioning holes are provided at intervals on the locking surface of the locking strip, with the size and shape of the positioning pin corresponding to the size and shape of the positioning hole.

[0010] Furthermore, two ear seats are provided circumferentially on the surface of the sleeve, and an outer clearance hole is provided between the two ear seats. The eccentric wheel control component is installed between the two ear seats by a rotating pin.

[0011] Furthermore, a limiting device is provided at the top of the inner tube to prevent the inner tube from falling out of the outer tube. The limiting device is located in the inner cavity of the outer tube.

[0012] Furthermore, both the outer and inner tubes are profile tubing.

[0013] Furthermore, the outer tube is a closed profile tube, and the inner tube is a grooved profile tube.

[0014] Furthermore, a universal connector is provided at the bottom of the inner tube, and a movable foot block is hinged to the lower end of the universal connector. The universal connector and the movable foot block are hinged through a spherical joint, and wear-resistant material is provided at the bottom of the movable foot block.

[0015] Furthermore, a folding desktop is rotatably connected to the top of the outer tube, and the folding desktop is configured to be folded.

[0016] Furthermore, the rotation range of the eccentric wheel control component is between 0° and 90°, the surface of the eccentric wheel control component handle has an anti-slip structure, and the surface of the inner tube is provided with height scale lines for easy height measurement.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model employs a locking component with an eccentric wheel press-locking structure added between the outer and inner tubes. It includes a sleeve, an elastic locking block, and an eccentric wheel control component. The sleeve is fixedly installed on the lower section of the outer tube and has a clearance hole. One end of the elastic locking block is a connecting end, and the other end is a meshing end. The elastic locking block is fixed to the sleeve via the connecting end, and the meshing end of the elastic locking block is located in the clearance hole. One end of the eccentric wheel control component has an eccentric wheel, and the other end is a handle. The eccentric wheel control component is rotatably installed on the sleeve. The outer arc surface of the eccentric wheel of the eccentric wheel control component contacts the outer surface of the meshing end of the elastic locking block. When the meshing end of the elastic locking block is in the press-locked state, the meshing end and the exposed surface of the locking strip are locked together, and the locking strip is in a locked state. When the meshing end of the elastic locking block is not in the press-locked state, the meshing end separates from the exposed surface of the locking strip, and the locking strip is in an unlocked state. This allows for convenient height adjustment between the inner and outer tubes, making it easy to operate, with stable and reliable locking, and easy disengagement. It is the core component for adjusting the height of a folding table.

[0018] It can adjust the height of the folding tabletop and improve the ease of adjustment, further reducing the length of the table after the legs are folded. When the legs are unfolded, they lock securely and firmly, effectively preventing the folding table from shaking or tipping over due to insecure locking during use, thus ensuring safety. Easy to operate: When adjusting the height, simply turn the locking handle to unlock and lock without the need for other tools. The operation is simple and quick, allowing users to adjust the height of the folding table according to their needs at any time.

[0019] Simple structure: The locking structure consists of only a few parts, such as an outer tube, an inner tube, a locking component, and an end cap. It is simple in structure, easy to manufacture and assemble, and reduces production costs. Long service life: The stable fit between the components results in minimal wear, extending the service life of the entire locking structure. Attached Figure Description

[0020] Figure 1 A three-dimensional structural diagram of the folding table using this utility model; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 3 This is a structural schematic diagram of a cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of a section at point B in the middle; Figure 5 for Figure 3 Enlarged view of a section at point C; Figure 6 for Figure 3 Enlarged view of a section at point D; Figure 7 for Figure 6 A cross-sectional view of the EE location.

[0021] In the diagram: 1-Outer tube; 2-Locking component; 21-Sleeve; 22-Elastic locking block; 23-Eccentric wheel control component; 24-Ear seat; 25-Rotating pin; 3-Inner tube; 4-Locking strip; 5-Universal connector; 6-Moving foot block; 7-Folding tabletop; 8-Limiting component; 231-Eccentric pressure roller; 232-Handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: A folding table leg extension and locking structure, such as... Figures 1 to 7As shown, the device includes an outer tube 1, a locking component 2, an inner tube 3, and a locking strip 4. The inner tube 3 is fitted inside the cavity of the outer tube 1 and can slide freely up and down relative to the outer tube 1. A strip-shaped groove is formed on the surface of the inner tube 3, and the locking strip 4 is fixedly embedded in the strip-shaped groove. An inner clearance hole is provided on the outer tube 1. The locking component 2 is provided between the outer tube 1 and the locking strip 4. The locking component 2 is an eccentric wheel press-locking structure, including a sleeve 21, an elastic locking block 22, an eccentric wheel control component 23, an ear seat 24, and a rotating pin 25. Two ear seats 24 are circumferentially spaced on the surface of the sleeve 21. The eccentric wheel control component 23 includes an eccentric pressure roller 231 and a handle 232. The eccentric wheel control component 23 is installed between the two ear seats 24 through the eccentric pressure roller 231 and the rotating pin 25. The sleeve 21 is fixedly installed. In the lower section of the outer tube 1, an outer clearance hole is provided on the sleeve 21. The outer clearance hole is located between two lugs 24. One end of the elastic locking block 22 is a connecting end, and the other end is a meshing end. The elastic locking block 22 is fixed on the sleeve 21 through the connecting end. The meshing end of the elastic locking block 22 is located in the outer clearance hole and the inner clearance hole. The outer arc surface of the eccentric pressure roller 231 of the eccentric wheel control component 23 contacts the outer surface of the meshing end of the elastic locking block 22. When the meshing end of the elastic locking block 22 is squeezed by the eccentric pressure roller 231, the five teeth on the inner surface of the meshing end engage with the rack-shaped locking strip 4 to lock the two. When the meshing end of the elastic locking block 22 is not squeezed, the five teeth on the inner surface of the meshing end separate from the rack-shaped locking strip 4, and the locking strip 4 is in the unlocked state. In this example, the outer tube 1 is a closed profile tube body, and the inner tube 3 is a grooved profile tube body. A limiting member 8 is provided at the top of the inner tube 3 to prevent the inner tube 3 from falling out of the outer tube 1. The limiting member 8 is located in the inner cavity of the outer tube 1.

[0024] Example 2: The difference from Example 1 is that the locking structure between the elastic locking block 22 and the locking strip 4 is different. In this example, a positioning pin is provided on the locking surface of the meshing end of the elastic locking block 22, and positioning holes are provided at intervals on the locking surface of the locking strip 4. The size and shape of the positioning pin correspond to the size and shape of the positioning hole.

[0025] In the above examples, the rotation range of the eccentric wheel control member 23 is set between 0° and 90°, the handle surface of the eccentric wheel control member 23 has an anti-slip structure, and the surface of the inner tube 3 is provided with height scale lines. These designs can improve the convenience and reliability of operation.

[0026] The locking structure between the elastic locking block 22 and the locking strip 4 has multiple equivalent structures. As long as pressure is applied between the two, the equivalent interlocking structure that can achieve locking and unlocking is within the protection range.

[0027] There are many other embodiments of this utility model. The folding table legs can contain multiple adjustment mechanisms, that is, each folding table leg contains two or more locking parts. In this way, the folded length of the table legs will be shorter. The outer tube 1 and the inner tube 3 are both profile tubes, and the locking strip 4 can also be designed as an integral part of the inner tube.

[0028] Folding tables using this type of leg extension and locking structure, such as... Figure 1 , Figure 3 , Figure 5 As shown, a folding tabletop 7 is rotatably connected to the top of the outer tube 1. The folding tabletop 7 is folded. A universal connector 5 is provided at the bottom of the inner tube 3. A movable foot block 6 is hinged to the lower end of the universal connector 5. The universal connector 5 and the movable foot block 6 are hinged through a spherical joint. A wear-resistant material is provided at the bottom of the movable foot block 6.

[0029] The principle of desktop height adjustment: When it is necessary to adjust the height of the folding desktop 7 from the ground, move the handle of the eccentric wheel control component 23. This releases the eccentric pressure roller in the eccentric wheel control component 23 from the elastic locking block 22. Under its own elasticity, the elastic locking block 22 disengages from the locking strip 4, and the engagement between the two disappears. Simply lift the folding desktop upwards or press it downwards to adjust the desktop height. When adjusted to the desired height, simply press the eccentric wheel control component 23 in the opposite direction. This causes the eccentric wheel in the eccentric wheel control component 23 to press the elastic locking block 22, making the elastic locking block 22 engage with the locking strip 4, thus locking the desktop. This prevents the desktop from shifting under pressure, improving the desktop's load-bearing capacity, stability, and reliability.

[0030] Although several embodiments of this utility model have been described, not all embodiments are exhaustive. Those skilled in the art will be able to make various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and spirit of this utility model. All embodiments that adopt the same or equivalent schemes as defined in the claims of this utility model are within the protection scope of this utility model.

Claims

1. A folding table leg extension and locking structure, comprising an outer tube (1) and an inner tube (3), wherein the inner tube (3) is fitted inside the cavity of the outer tube (1), and the inner tube (3) can slide freely up and down relative to the outer tube (1), characterized in that: A straight locking strip (4) is provided on the side wall of the inner tube (3), and a locking component (2) is provided between the outer tube (1) and the locking strip (4); when the locking component (2) is in the locked state, the inner tube (3) is in the locked state relative to the outer tube (1), and the inner tube (3) and the outer tube (1) cannot move. When the locking component (2) is in the unlocked state, the inner tube (3) can move linearly relative to the outer tube (1).

2. The folding table leg extension and locking structure according to claim 1, characterized in that: A strip-shaped groove is provided on the surface of the inner tube (3), and a locking strip (4) is fixedly embedded in the strip-shaped groove. An inner clearance hole is provided on the outer tube (1). The locking component (2) is an eccentric wheel press-locking structure, including a sleeve (21), an elastic locking block (22), and an eccentric wheel control component (23). The sleeve (21) is fixedly installed on the lower section of the outer tube (1). An outer clearance hole is provided on the sleeve (21). One end of the elastic locking block (22) is a connecting end, and the other end is a meshing end. The elastic locking block (22) is fixed on the sleeve (21) through the connecting end. The meshing end of the elastic locking block (22) is located in the outer clearance hole. The eccentric wheel control component (23) is fixed on the sleeve (21) through the connecting end. 3) One end is provided with an eccentric pressure roller and the other end is a handle. The eccentric wheel control component (23) is rotatably mounted on the sleeve (21). The outer arc surface of the eccentric pressure roller of the eccentric wheel control component (23) contacts the outer surface of the meshing end of the elastic locking block (22). When the meshing end of the elastic locking block (22) is in the pressing state, the meshing end of the elastic locking block (22) is engaged and locked with the exposed surface of the locking strip (4). The locking strip (4) is in the locked state. When the meshing end of the elastic locking block (22) is in the non-pressing state, the meshing end of the elastic locking block (22) is separated from the exposed surface of the locking strip (4). The locking strip (4) is in the unlocked state.

3. The folding table leg extension and locking structure according to claim 2, characterized in that: The locking bar (4) is a rack, and at least one tooth-shaped structure that meshes with the rack on the locking surface of the meshing end of the elastic locking block (22) is provided.

4. The folding table leg extension and locking structure according to claim 2, characterized in that: A positioning pin is provided on the locking surface of the meshing end of the elastic locking block (22), and positioning holes are provided at intervals on the locking surface of the locking strip (4). The size and shape of the positioning pin correspond to the size and shape of the positioning hole.

5. The folding table leg extension and locking structure according to claim 2, characterized in that: Two ear seats (24) are provided circumferentially on the surface of the sleeve (21), and an outer clearance hole is provided between the two ear seats (24). The eccentric wheel control component (23) is installed between the two ear seats (24) through a rotating pin (25).

6. The folding table leg extension and locking structure according to claim 1, characterized in that: A limiting member (8) is provided at the top of the inner tube (3) to prevent the inner tube (3) from falling out of the outer tube (1). The limiting member (8) is located in the inner cavity of the outer tube (1).

7. The folding table leg extension and locking structure according to claim 1, characterized in that: Both the outer tube (1) and the inner tube (3) are profile tubes.

8. The folding table leg extension pressing and locking structure according to claim 1, characterized in that: The outer tube (1) is a closed profile tube, and the inner tube (3) is a grooved profile tube.

9. The folding table leg extension and locking structure according to claim 1, characterized in that: A universal connector (5) is provided at the bottom end of the inner tube (3). A movable foot block (6) is hinged to the lower end of the universal connector (5). The universal connector (5) and the movable foot block (6) are hinged through a spherical joint. A wear-resistant material is provided at the bottom end of the movable foot block (6).

10. The folding table leg extension pressing and locking structure according to claim 1, characterized in that: A folding tabletop (7) is rotatably connected to the top of the outer tube (1), and the folding tabletop (7) is configured to be folded.

11. The folding table leg extension and locking structure according to claim 4, characterized in that: The rotation range of the eccentric wheel control component (23) is between 0° and 90°. The handle surface of the eccentric wheel control component (23) has an anti-slip structure, and the surface of the inner tube (3) is provided with height scale lines.

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