A type of interlocking chair legs

Abstract

A modular chair leg includes a central seat and multiple support legs detachably mounted on the outer periphery of the central seat. The central seat has a decorative reinforcement structure, which includes multiple annularly distributed upper decorative ribs and multiple annularly distributed insulating decorative ribs. The upper decorative ribs are located on the upper part of the central seat, and the upper inner end of each insulating decorative rib is connected to its outer end. Each support leg has an upper inner end corresponding to one upper decorative rib, and at least one insulating decorative rib is provided between the inner ends of two circumferentially adjacent support legs. This invention retains the advantages of disassembly for transportation and reduced packaging volume while ensuring the product's aesthetic appeal. It offers the advantages of convenient transportation and strong aesthetics, enhancing product competitiveness and facilitating sales.

Description

Technical Field

[0001] This utility model relates to the field of chair technology, specifically to a splicing chair leg. Background Technology

[0002] Office chairs are a type of chair. Currently, most office chairs use five-star legs. To reduce the packaging volume of five-star legs and facilitate logistics and transportation, some existing five-star legs are usually designed to be detachable.

[0003] For example, application number CN202220818930.8 describes a detachable chair leg, comprising a tapered central tube and foot tubes. An inner sleeve is welded to the outer side of the tapered central tube, and an outer sleeve is welded to one end of the foot tube. Both the inner and outer sleeves are integrally formed from stamped iron. During transportation, the locking screws are removed, allowing the chair leg to disassemble into several individual parts, resulting in a small packaging volume and easy transport. In use, the inner sleeve is inserted into the outer sleeve, and the locking screws are tightened to form a detachable chair leg. The structure is simple, installation is convenient, and to a certain extent, it meets the industry's demand for detachable five-star chair legs. However, machining accuracy errors are unavoidable in the processing of various components of the chair legs. These include deviations in the welding positions of the inner sleeve and the tapered central tube, errors in the welding angles of the outer sleeve and the leg tubes, and dimensional tolerances between the inner and outer sleeves. Furthermore, during assembly, factors such as the operator's technique and tool precision can further introduce assembly accuracy errors. The cumulative effect of these errors results in inconsistent assembly of the five-star base structure. For example, while some pairs of circumferentially adjacent leg tubes may fit precisely against the tapered central tube, others may have noticeable gaps. These gaps directly compromise the integrity and aesthetics of the overall five-star base structure, leading to inconsistent product appearance quality and a lack of a unified, high-quality visual effect. This negatively impacts consumer acceptance and hinders market promotion and sales. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a splicing chair leg.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A modular chair leg includes a central seat and multiple support legs detachably mounted on the outer periphery of the central seat; characterized in that: the central seat is provided with a decorative reinforcement structure, the decorative reinforcement structure including multiple annularly distributed upper decorative ribs and multiple annularly distributed isolation decorative ribs, the upper decorative ribs being located on the upper part of the central seat, the upper inner end of the isolation decorative ribs being connected to the outer end of the upper decorative ribs, the upper inner end of each support leg being correspondingly adapted to one upper decorative rib, and at least one isolation decorative rib being provided between the inner ends of two circumferentially adjacent support legs.

[0006] In this utility model, the isolation decorative rib includes an upper isolation rib connected to the upper part of the middle seat, a side isolation rib connected to the side of the middle seat, and a lower isolation rib located below the side isolation rib. The upper and lower ends of the side isolation rib are integrally formed and connected to the outer ends of the upper isolation rib and the lower isolation rib, respectively. The inner end of the upper isolation rib is connected to the outer end of the upper decorative rib.

[0007] In this utility model, the intermediate seat includes an intermediate tube body and multiple connecting inserts integrally formed on the outer periphery of the intermediate tube body, the multiple connecting inserts being evenly distributed along the outer periphery of the intermediate tube body; the support feet correspond one-to-one with the connecting inserts, and the inner end of the support feet is provided with a connecting slot for the connecting inserts to be inserted; after the connecting inserts are inserted into the connecting slots, the support feet and the intermediate seat are fixed together by a fixing component; the upper isolation rib is connected to the upper part of the intermediate tube body, and the isolation decorative rib is connected between two circumferentially adjacent connecting inserts.

[0008] In this utility model, the fixing component includes a fixing bolt, the support leg is provided with a fixing through hole that connects to the connecting slot, the connecting insert is provided with a fixing screw hole corresponding to the fixing through hole, and the screw of the fixing bolt passes through the fixing through hole and engages with the fixing screw hole threadedly.

[0009] In this utility model, the fixing component includes a fixing top block, the connecting insert is provided with a movable groove, one end of the movable groove is provided with a groove opening that penetrates the connecting insert, the fixing screw hole penetrates and communicates with the movable groove, the fixing top block is guided and inserted into the movable groove, and the screw of the fixing bolt pushes the fixing top block against the groove wall of the connecting slot.

[0010] In this invention, the fixed top block is provided with a fixing protrusion for contacting the fixing bolt, and each fixing protrusion corresponds to at least one screw of the fixing bolt.

[0011] In this utility model, the outer end surface of the upper decorative rib is a circular arc convex surface, and the inner upper side of the support foot is provided with a circular arc concave surface that matches the circular arc convex surface.

[0012] In this utility model, the inner end side of the support foot is also provided with two upper positioning surfaces. The two upper positioning surfaces are symmetrically arranged on both sides of the arc concave surface and are respectively connected to the two ends of the arc concave surface. The two upper positioning surfaces correspond to two circumferentially adjacent upper isolation ribs.

[0013] In this utility model, the inner end of the lower isolation rib is connected to the outer wall of the intermediate tube, and the lower side of the inner end of the support foot is provided with two lower positioning surfaces, which correspond to two circumferentially adjacent lower isolation ribs respectively.

[0014] In this utility model, the insulating decorative rib is configured to protrude beyond the gap between two adjacent support feet, and the top of the upper decorative rib is configured to be higher than the top of the inner end of the support foot; Alternatively, the decorative rib is configured not to protrude beyond the gap between two adjacent support legs, and the top of the upper decorative rib is configured to be lower than or flush with the top of the inner end of the support leg.

[0015] The beneficial effects of this utility model are as follows: Based on the detachable connection between the middle seat and the support legs, this utility model incorporates a decorative reinforcement structure on the middle seat. This structure includes upper decorative ribs corresponding to the inner ends of the support legs and insulating decorative ribs positioned between adjacent support legs. This decorative reinforcement structure separates two circumferentially adjacent support legs, creating a decorative effect that attracts the user's attention, thus making the gap between adjacent support legs less noticeable and improving the product's aesthetics. Furthermore, the detachable design of the middle seat and support legs allows for the use of different colors, enriching the visual layers and enhancing the overall visual appeal of the chair legs, satisfying users' personalized aesthetic needs. The flexible combination of different colored middle seats and support legs also adapts to various home or office styles. In summary, this utility model retains the advantages of disassembly for transportation and reduced packaging volume while maintaining the product's aesthetic appeal. It offers the advantages of convenient transportation and strong aesthetics, enhancing product competitiveness and facilitating sales. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 For the three-dimensional interlocking chair legs Figure 1 ; Figure 2 For the three-dimensional interlocking chair legs Figure 2 ; Figure 3 Explosion of the intermediate seat and fixed top block Figure 1 ; Figure 4 Explosion of the intermediate seat and fixed top block Figure 2 ; Figure 5 A 3D diagram of the supporting legs; Figure 6 This is a schematic diagram of the installation of the fixed components. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0019] Furthermore, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection using welding, a detachable connection using bolts, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions 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 utility model.

[0021] Reference Figure 1-6A type of interlocking chair leg includes a central seat 1 and multiple support legs 2 detachably mounted on the outer periphery of the central seat 1, preferably five support legs 2; the central seat 1 is provided with a decorative reinforcement structure integrally formed therewith, the decorative reinforcement structure including multiple annularly distributed upper decorative ribs 11 and multiple annularly distributed isolation decorative ribs 12, the upper decorative ribs 11 are located on the upper part of the central seat 1, the upper inner end of the isolation decorative ribs 12 is connected to the outer end of the upper decorative ribs 11, the upper inner end of each support leg 2 is correspondingly adapted to one upper decorative rib 11, and at least one isolation decorative rib 12 is provided between the inner ends of two circumferentially adjacent support legs 2.

[0022] This invention, based on the detachable connection between the middle seat 1 and the support legs 2, incorporates a decorative reinforcement structure on the middle seat 1. This structure includes upper decorative ribs 11 corresponding to the inner ends of the support legs 2 and insulating decorative ribs 12 positioned between adjacent support legs 2. This decorative reinforcement structure separates two circumferentially adjacent support legs 2, creating a decorative effect between them and attracting the user's attention, thus making the gap between adjacent support legs 2 less noticeable and improving the product's aesthetics. This invention retains the advantages of disassembly for transportation and reduced packaging volume while maintaining the product's aesthetic appeal. It offers the advantages of convenient transportation and strong aesthetics, enhancing product competitiveness and facilitating sales. Furthermore, the decorative reinforcement structure also functions as a reinforcing rib, strengthening the structural strength of the middle seat 1 and extending the lifespan of the chair legs.

[0023] In this embodiment, the insulating decorative rib 12 is in the shape of an "]". The insulating decorative rib 12 includes an upper insulating rib 121 connected to the upper part of the intermediate seat 1, a side insulating rib 122 connected to the side of the intermediate seat 1, and a lower insulating rib 123 located below the side insulating rib 122. The upper and lower ends of the side insulating rib 122 are integrally formed and connected to the outer ends of the upper insulating rib 121 and the lower insulating rib 123, respectively. The inner end of the upper insulating rib 121 is connected to the outer end of the upper decorative rib 11. Through the "]" shaped structural design, the insulating decorative rib 12 not only serves to separate adjacent support legs 2, but also enhances the structural strength of the intermediate seat 1, further improving the overall stability.

[0024] In this embodiment, the decorative rib 12 is configured to protrude beyond the gap between two adjacent support legs 2, and the top of the upper decorative rib 11 is configured to be higher than the top of the inner end of the support leg 2, making the decorative effect more obvious and creating a visual blocking effect, further improving the overall aesthetics of the product. Of course, in other embodiments, the decorative rib 12 is configured not to protrude beyond the gap between two adjacent support legs 2, and the top of the upper decorative rib 11 is configured to be lower than or flush with the top of the inner end of the support leg 2. In this case, the decorative effect is relatively weaker, but it can still attract the user's attention through design aesthetics, thereby diverting the user's attention from the gap between the support legs 2.

[0025] In this embodiment, the intermediate seat 1 is made of aluminum alloy and includes an intermediate tube 101 and multiple connecting inserts 102 integrally formed on the outer periphery of the intermediate tube 101. The multiple connecting inserts 102 are evenly distributed along the outer periphery of the intermediate tube 101, and each connecting insert 102 extends radially outward along the intermediate tube 101. The support feet 2 correspond one-to-one with the connecting inserts 102, and the inner end of the support foot 2 is provided with a connecting slot 21 for the connecting insert 102 to be inserted. After the connecting insert 102 is inserted into the connecting slot 21, the support foot 2 and the intermediate seat 1 are fixed by a fixing component, thereby realizing a detachable connection between the support foot 2 and the intermediate seat 1. Further, the upper isolation rib 121 is connected to the upper part of the intermediate tube 101, and the isolation decorative rib 12 is connected between two circumferentially adjacent connecting inserts 102, thereby separating the two circumferentially adjacent connecting inserts 102.

[0026] In this embodiment, the fixing component includes a fixing bolt 3, the support leg 2 is provided with a fixing through hole 22 that connects to the connecting slot 21, the connecting insert 102 is provided with a fixing screw hole 103 corresponding to the fixing through hole 22, and the screw of the fixing bolt 3 passes through the fixing through hole 22 and is threaded into the fixing screw hole 103.

[0027] In this embodiment, the fixing component includes a fixing top block 4, and the connecting insertion part 102 is provided with a movable groove 104. One end of the movable groove 104 is provided with a groove opening that penetrates the connecting insertion part 102. The fixing screw hole 103 penetrates and communicates with the movable groove 104. The fixing top block 4 is guided and inserted into the movable groove 104. The screw of the fixing bolt 3 pushes the fixing top block 4 against the groove wall of the connecting slot 21. When the fixing bolt 3 is rotated in the tightening direction, the fixing top block 4 is pressed upward against the groove wall of the connecting slot 21 within the movable groove 104, thereby tightly fixing the connecting insertion part 102 and the support foot 2. With the above-mentioned design of the fixed top block 4, the upper part of the fixed top block 4 and the lower part of the connecting insert 102 can be pressed against the groove wall of the connecting slot 21 respectively. This not only improves the connection strength between the support leg 2 and the middle seat 1, but also disperses the pressure through the fixed top block 4, avoiding the impact on the overall structural stability due to local stress concentration. At the same time, after the support leg 2 is installed, its inner top can better fit the decorative rib 11 and the isolation decorative rib 12, thereby ensuring the aesthetics of the chair leg.

[0028] In this embodiment, the fixing through hole 22 is located at the lower part of the support foot 2, and the fixing through hole 22 extends vertically through and connects to the connecting slot 21; the lower end of the fixing screw hole 103 extends through and connects to the connecting insert 102, and the upper end extends vertically through and connects to the bottom surface of the movable groove 104; the groove opening is located at the upper end of the movable groove 104, so that after the fixing bolt 3 is installed, the head of the fixing bolt 3 is hidden at the bottom of the support foot 2, thereby improving the overall neatness and aesthetics.

[0029] In this embodiment, three fixing through holes 22 are provided and arranged sequentially at intervals from the inner end of the support leg 2 to the outer end of the support leg 2. Three fixing screw holes 103 are provided and correspond one-to-one with the three fixing through holes 22. The corresponding fixing screw holes 103 and fixing through holes 22 are combined to form fixing hole groups. At least one fixing hole group is fitted with one fixing bolt 3. When fixing the support leg 2, the fixing bolt 3 can be fitted in the fixing hole group located in the middle, and the support leg 2 can be fixed by the fixing top block 4 with one fixing bolt 3; or the fixing bolt 3 can be fitted in all three fixing hole groups; or the fixing bolt 3 can be fitted in the two fixing hole groups located at the beginning and end, so that the support leg 2 is more firmly fixed on the connecting plug 102.

[0030] In this embodiment, the fixing top block 4 is provided with fixing protrusions 41 for contacting the fixing bolts 3. Each fixing protrusion 41 corresponds to at least one screw of the fixing bolt 3. By utilizing the abutting fit between the fixing protrusion 41 and the end face of the screw of the fixing bolt 3, the fixing bolt 3 is prevented from drilling through the fixing top block 4 during the rotation and tightening process, thereby ensuring that the fixing top block 4 remains stable during the tightening process and reducing the probability of damage to the fixing top block 4.

[0031] In this embodiment, the fixing block 4 can be nylon or aluminum alloy, preferably nylon, which is lightweight and wear-resistant, further reducing the packaging weight.

[0032] In this embodiment, two adjacent upper decorative ribs 11 are integrally formed and connected. Multiple upper decorative ribs 11 together form an upper decorative ring, which is integrally connected to the upper side of the intermediate tube 101. The upper decorative ring is coaxially arranged with the intermediate tube 101, and its diameter is the same as the diameter of the intermediate tube 101, facilitating the assembly and installation of the intermediate seat 1 with other chair components. The formation of the upper decorative ring by multiple upper decorative ribs 11 enhances the aesthetics of the decorative reinforcement structure.

[0033] In this embodiment, the support leg 2 is made of steel, and a mounting part 20 is provided at the lower outer end of the support leg 2. The mounting part 20 is provided with mounting screw holes, and the mounting part 20 and mounting screw holes are used to install the chair casters. Furthermore, the outer end surface of the upper decorative rib 11 is a rounded convex surface 111, and the upper inner side of the support leg 2 is provided with a rounded concave surface 23 that matches the rounded convex surface 111, so that the support leg 2 and the middle seat 1 fit better when connected, and improve the aesthetics between the upper inner end of the support leg 2 and the outer side of the upper decorative rib 11. In addition, the inner side of the support leg 2 is provided with two upper positioning surfaces 24. The two upper positioning surfaces 24 are symmetrically arranged on both sides of the arc concave surface 23 and connected to the two ends of the arc concave surface 23 respectively. The two upper positioning surfaces 24 correspond to the two circumferentially adjacent upper isolation ribs 121 respectively. Ideally, when the two upper positioning surfaces 24 abut against the wall surface of the upper isolation ribs 121 respectively, the lower inner part of the support leg 2 is positioned, so that the decorative reinforcement structure can assist in the positioning of the support leg 2, improve the assembly efficiency of the support leg 2 on the intermediate seat 1, and ensure that the connection between the support leg 2 and the intermediate seat 1 is more stable; at the same time, the gap between the upper inner part of the support leg 2 and the upper isolation rib 121 is invisible.

[0034] In this embodiment, the inner end of the lower isolation rib 123 is connected to the outer wall of the intermediate tube 101, and the inner end of the lower isolation rib 123 is provided with isolation protrusions 1231 on both sides thereon. The isolation protrusions 1231 are also connected to the outer wall of the intermediate tube 101, thereby improving the structural stability of the lower isolation rib 123. The lower side of the inner end of the support leg 2 is provided with two lower positioning surfaces 25. The two lower positioning surfaces 25 correspond to the two circumferentially adjacent lower isolation ribs 123 respectively. Ideally, when the two lower positioning surfaces 25 abut against the wall of the lower isolation rib 123 respectively, the lower part of the inner end of the support leg 2 is positioned, so that the decorative reinforcement structure can assist in the positioning of the support leg 2 and improve the assembly efficiency of the support leg 2 on the intermediate seat 1. At the same time, the gap between the lower part of the inner end of the support leg 2 and the lower isolation rib 123 can be made invisible.

[0035] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A spliced chair leg comprising a middle seat (1) and a plurality of supporting legs (2) detachably mounted on the outer periphery of the middle seat (1); characterized in that: The intermediate seat (1) is provided with a decorative reinforcement structure, which includes multiple annularly distributed upper decorative ribs (11) and multiple annularly distributed isolation decorative ribs (12). The upper decorative ribs (11) are located on the upper part of the intermediate seat (1). The upper part of the inner end of the isolation decorative ribs (12) is connected to the outer end of the upper decorative ribs (11). The upper part of the inner end of each support foot (2) is adapted to one upper decorative rib (11). At least one isolation decorative rib (12) is provided between the inner ends of two circumferentially adjacent support feet (2).

2. A spliced chair foot according to claim 1, wherein: The isolation decorative rib (12) includes an upper isolation rib (121) connected to the upper part of the middle seat (1), a side isolation rib (122) connected to the side of the middle seat (1), and a lower isolation rib (123) located below the side isolation rib (122). The upper and lower ends of the side isolation rib (122) are integrally formed and connected to the outer ends of the upper isolation rib (121) and the lower isolation rib (123), respectively. The inner end of the upper isolation rib (121) is connected to the outer end of the upper decorative rib (11).

3. A spliced chair foot according to claim 2, wherein: The intermediate seat (1) includes an intermediate tube (101) and multiple connecting inserts (102) integrally formed on the outer periphery of the intermediate tube (101). The multiple connecting inserts (102) are evenly distributed along the outer periphery of the intermediate tube (101). The support foot (2) corresponds to the connecting insert (102) one by one. The inner end of the support foot (2) is provided with a connecting slot (21) for the connecting insert (102) to be inserted. After the connecting insert (102) is inserted into the connecting slot (21), the support foot (2) and the intermediate seat (1) are fixed by a fixing component. The upper isolation rib (121) is connected to the upper part of the intermediate tube (101), and the isolation decorative rib (12) is connected between two circumferentially adjacent connecting inserts (102).

4. A spliced chair foot according to claim 3, wherein: The fixing component includes a fixing bolt (3), the support foot (2) is provided with a fixing through hole (22) that connects to the connecting slot (21), the connecting insert (102) is provided with a fixing screw hole (103) corresponding to the fixing through hole (22), and the screw of the fixing bolt (3) passes through the fixing through hole (22) and engages with the fixing screw hole (103) threadedly.

5. A type of interlocking chair leg according to claim 4, characterized in that: The fixing component includes a fixing top block (4), and the connecting insert (102) is provided with a movable groove (104). One end of the movable groove (104) is provided with a groove opening that penetrates the connecting insert (102). The fixing screw hole (103) penetrates and communicates with the movable groove (104). The fixing top block (4) is guided and inserted into the movable groove (104). The screw of the fixing bolt (3) pushes the fixing top block (4) to press against the groove wall of the connecting slot (21).

6. A type of interlocking chair leg according to claim 5, characterized in that: The fixed top block (4) is provided with a fixed protrusion (41) for contacting the fixed bolt (3), and each fixed protrusion (41) corresponds to the thread of at least one fixed bolt (3).

7. A type of interlocking chair leg according to claim 1, characterized in that: The outer end surface of the upper decorative rib (11) is a circular arc convex surface (111), and the inner upper side of the support foot (2) is provided with a circular arc concave surface (23) that matches the circular arc convex surface (111).

8. A type of interlocking chair leg according to claim 7, characterized in that: The inner side of the support foot (2) is also provided with two upper positioning surfaces (24). The two upper positioning surfaces (24) are symmetrically arranged on both sides of the arc concave surface (23) and connected to the two ends of the arc concave surface (23). The two upper positioning surfaces (24) correspond to two circumferentially adjacent upper isolation ribs (121).

9. A type of interlocking chair leg according to claim 3, characterized in that: The inner end of the lower isolation rib (123) is connected to the outer wall of the intermediate tube (101). The lower side of the inner end of the support foot (2) is provided with two lower positioning surfaces (25), which correspond to two circumferentially adjacent lower isolation ribs (123).

10. A splicing chair leg according to any one of claims 1-9, characterized in that: The isolation decorative rib (12) is configured to protrude beyond the gap between two adjacent support feet (2), and the top of the upper decorative rib (11) is configured to be higher than the top of the inner end of the support foot (2); Alternatively, the isolation decorative rib (12) is configured not to protrude beyond the gap between two adjacent support feet (2), and the top of the upper decorative rib (11) is configured to be lower than or flush with the top of the inner end of the support foot (2).

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