Multi-claw supporting leg for swivel chair

Abstract

A multi-claw supporting leg for a swivel chair comprises a center ring, a plurality of supporting claws are distributed on the outer cylindrical surface of the center ring in an annular array mode, and the supporting claws are made of metal materials and fixedly welded to the outer cylindrical surface of the center ring into a whole. The plastic shell covers the upper surfaces of the supporting claws, the inner end of the plastic shell is in butt joint with the outer cylindrical surface of the center ring, and a wrapping head is arranged at the outer end of the plastic shell and wraps the outer ends of the supporting claws; the decorative cover integrally covers the upper surface of the plastic shell, and the inner end of the decorative cover is in butt joint with the outer cylindrical surface of the central ring. The utility model has the beneficial effects that the design of combining metal material and plastic material is adopted, and the supporting claws are made of metal material and are welded and fixed with the central ring into a whole. By means of the design, the production process is simplified, complex procedures such as grinding, polishing and chromium plating of a traditional iron supporting leg are avoided, and therefore the manufacturing cost and the production difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chair accessories, in particular to a multi-claw supporting foot for a swivel chair. Background Art

[0002] With the continuous development of the office furniture market, swivel chairs have become an indispensable part of offices. The stability and durability of swivel chairs depend largely on the structure and material of their support legs. However, the support legs in the prior art have many problems and limitations.

[0003] There are mainly the following ways to make support feet on the market: 1. Made of iron: This type of support foot is usually made of iron material, and after production, it needs to go through complex processes such as grinding, polishing, and powder spraying. Although iron support feet perform well in terms of rigidity and strength, they have poor wear resistance and are prone to wear during use. In addition, the production process is complicated, which increases manufacturing costs and time.

[0004] 2. Integral cast aluminum: Another common support foot is made of integral cast aluminum or stainless steel plate stamping folding. Cast aluminum and stainless steel support feet have good strength and durability and can withstand large loads. However, the production cost of cast aluminum and stainless steel stamping is high, which is not conducive to large-scale production and market promotion, making its price relatively expensive and not easily accepted by consumers.

[0005] 3. Made of all plastic: There is another type of support leg that is made of all plastic. Although plastic support legs have advantages in material cost and relatively simple manufacturing process, their mechanical properties are relatively weak. Especially at the location where the casters are installed, the suspended end of the support leg is prone to cracking. Once cracking occurs, the load-bearing capacity of the support leg will be greatly reduced, which will directly affect the service life and safety of the chair.

[0006] Therefore, it is necessary to make further improvements. Utility Model Content

[0007] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a multi-claw support foot for a swivel chair which has a simple structure, is easy to use, low cost and has high wear resistance and high strength, thereby improving the overall quality and service life of the swivel chair.

[0008] The purpose of the utility model is achieved in the following way: a multi-claw support foot for a swivel chair, which includes a center ring, a plurality of support claws are distributed in a circular array on the outer cylindrical surface of the center ring, and the support claws are made of metal material and are welded and fixed to the outer cylindrical surface of the center ring as a whole;

[0009] It also includes a plastic shell covering the upper surface of the supporting claw, the inner end of the plastic shell is butted against the outer cylindrical surface of the center ring, and the outer end of the plastic shell is provided with a covering head covering the outer end of the supporting claw;

[0010] The utility model also comprises a decorative cover which entirely covers the upper surface of the plastic shell, and the inner end of the decorative cover is butted against the outer cylindrical surface of the center ring.

[0011] Furthermore: the cross section of the supporting claw is a rectangular tube, and the cross section area is gradually reduced from the inner end to the outer end.

[0012] Furthermore: the plastic shell is an open groove structure with an open lower end, and an assembly groove matching with the upper end surface of the supporting claw is arranged in the open groove of the plastic shell, and the assembly groove is clamped and fixed on the supporting claw.

[0013] Furthermore: a plurality of positioning buckles are arranged in the assembly groove, and correspondingly, a corresponding positioning hole is arranged on the supporting claw, and the positioning buckles are inserted into the positioning hole to be connected with the supporting claw.

[0014] Furthermore: the decorative cover is made of a stainless steel plate, and flanges are arranged on both sides thereof, and the flanges are buckled and connected and fixed to the lower end surface of the plastic shell.

[0015] A caster seat is embedded in the top of the supporting claw.

[0016] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness.

[0017] 2. The utility model adopts a design that combines metal and plastic materials. The support claws are made of metal and are welded and fixed to the center ring as a whole. This design simplifies the production process and avoids the complex processes of grinding, polishing and chrome plating required for traditional iron support feet, thereby reducing manufacturing costs and production difficulties.

[0018] 3. The utility model achieves an optimized combination of materials by covering the metal support claw with a plastic shell. Compared with the integral cast aluminum support foot, the design of the utility model effectively reduces the production cost while ensuring strength and durability, and is suitable for large-scale production and market promotion.

[0019] 4. The plastic shell and the metal support claw are designed with a matching assembly groove and a positioning buckle, making the installation process simple and quick. The positioning buckle in the assembly groove cooperates with the positioning hole on the support claw to ensure a stable connection between the plastic shell and the support claw, and enhance the reliability of the overall structure.

[0020] 5. The utility model covers the plastic shell with a stainless steel decorative cover, which not only improves the appearance of the support foot, but also increases the protective performance. The use of the stainless steel decorative cover improves the corrosion resistance and wear resistance of the support foot and prolongs the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the general assembly effect diagram of the utility model.

[0022] Figure 2 , 3 This is the structural assembly drawing of the utility model.

[0023] Figure 4 It is a longitudinal structural sectional view of the utility model.

[0024] Figure 5 For the utility model Figure 4 A-section structure enlarged view.

[0025] Figure 6 This is a cross-sectional view of the structure of the utility model.

[0026] Explanation of reference numerals: 1 - center ring; 2 - support claw; 21 - positioning hole; 3 - plastic shell; 31 - covering head; 32 - assembly groove; 33 - positioning buckle; 4 - decorative cover; 41 - flange. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below with reference to the accompanying drawings. A multi-claw support foot for a swivel chair comprises a center ring 1, a plurality of support claws 2 are distributed in a circular array on the outer cylindrical surface of the center ring 1, the support claws 2 are made of metal material, and are welded and fixed to the outer cylindrical surface of the center ring 1 as a whole;

[0028] It also includes a plastic shell 3 covering the upper surface of the supporting claw 2, the inner end of the plastic shell 3 is in contact with the outer cylindrical surface of the center ring 1, and the outer end of the plastic shell 3 is provided with a covering head 31, which covers the outer end of the supporting claw 2;

[0029] The plastic shell 3 further comprises a decorative cover 4 , which entirely covers the upper surface of the plastic shell 3 , and the inner end of the decorative cover 4 is butted against the outer cylindrical surface of the center ring 1 .

[0030] In one embodiment, the cross section of the supporting claw 2 is a rectangular tube, and the cross section area is gradually reduced from the inner end to the outer end.

[0031] In one embodiment, the plastic shell 3 is an open groove structure with an open lower end. An assembly groove 32 that matches the upper end surface of the supporting claw 2 is provided in the open groove of the plastic shell 3 , and the assembly groove 32 is clamped and fixed on the supporting claw 2 .

[0032] In one embodiment, a plurality of positioning buckles 33 are disposed in the assembly groove 32 , and correspondingly, a corresponding positioning hole 21 is disposed on the support claw 2 , and the positioning buckles 33 are inserted into the positioning hole 21 to be connected thereto.

[0033] In one embodiment, the decorative cover 4 is made of a stainless steel plate, and flanges 41 are provided on both sides thereof. The flanges 41 are buckled on the lower end surface of the plastic shell 3 to be connected and fixed thereto.

[0034] A caster seat 22 is embedded in the top of the supporting claw 2 .

[0035] Working principle: The utility model of a multi-claw support foot for a swivel chair realizes high strength, wear resistance and aesthetics of the support foot through reasonable structural design and material selection. The specific working principle is as follows:

[0036] In this case, the center ring 1 is the core part of the entire support leg and is firmly connected to a number of support claws 2 by welding. The support claws 2 are distributed in a circular array on the outer cylindrical surface of the center ring 1 to form a multi-claw support structure. This circular distribution can evenly disperse the load and provide good stability and support force.

[0037] The support claw 2 is made of metal material, which ensures high strength and good wear resistance. When the metal support claw is loaded by the chair, it can effectively withstand pressure and impact and avoid deformation and wear.

[0038] Furthermore, the outer part of the supporting claw 2 is covered with a plastic shell 3, the inner end of the plastic shell 3 is butted against the outer cylindrical surface of the center ring 1, and the outer end is provided with a covering head 31, which covers the outer end of the supporting claw 2. The plastic shell 3 not only provides additional protection, but also can be designed to be more robust as a whole, giving the user a visually solid and reliable appearance. At the same time, the plastic shell also provides a basic support for installing the decorative cover.

[0039] The plastic shell 3 is a groove-shaped structure with an opening at the lower end, and is provided with an assembly groove 32 inside that matches the upper end surface of the support claw 2. The assembly groove 32 matches the positioning hole 21 on the support claw 2 through the positioning buckle 33 to ensure that the plastic shell 3 is firmly fixed on the support claw 2. After the positioning buckle 33 is inserted into the positioning hole 21, it is tightly connected with it, preventing the plastic shell from loosening or falling off during use.

[0040] In addition, the upper surface of the plastic shell 3 is covered with a decorative cover 4, and the inner end of the decorative cover 4 is butted against the outer cylindrical surface of the center ring 1. The decorative cover 4 is made of a stainless steel plate, and flanges 41 are provided on both sides thereof, and the flanges 41 are buckled on the lower end surface of the plastic shell 3 and connected and fixed thereto. This design not only improves the aesthetics of the support foot, but also provides an additional protective layer, thereby improving the corrosion resistance and wear resistance of the support foot.

[0041] In summary, through the above structural design and material combination, the multi-claw support foot for a swivel chair of the utility model can not only withstand large loads and impacts, but also has good wear resistance and corrosion resistance. Its production process is simple and low cost, suitable for large-scale production and market promotion. In addition, the aesthetics and safety of the support foot are also significantly improved, which can meet the user's demand for high-quality and low-cost swivel chairs.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the scope of protection of the claims created by the utility model.

Claims

1. A multi-claw support foot for a swivel chair, characterized in that: It comprises a center ring (1), a plurality of support claws (2) are distributed in a ring array on the outer cylindrical surface of the center ring (1), and the support claws (2) are made of metal material and are welded and fixed to the outer cylindrical surface of the center ring (1) as a whole; It also includes a plastic shell (3) covering the upper surface of the supporting claw (2), the inner end of the plastic shell (3) being in contact with the outer cylindrical surface of the center ring (1), and the outer end of the plastic shell (3) being provided with a covering head (31) covering the outer end head of the supporting claw (2); It also includes a decorative cover (4), which entirely covers the upper surface of the plastic shell (3), and the inner end of the decorative cover (4) is butted against the outer cylindrical surface of the center ring (1).

2. The multi-claw support foot for a swivel chair according to claim 1, characterized in that: The supporting claw (2) has a rectangular tubular cross section, and its cross-sectional area is gradually reduced from the inner end to the outer end.

3. The multi-claw support foot for a swivel chair according to claim 1, characterized in that: The plastic shell (3) is an open groove-shaped structure with an open lower end. An assembly groove (32) that matches the upper end surface of the support claw (2) is provided in the open groove of the plastic shell (3). The assembly groove (32) is clamped and fixed on the support claw (2).

4. The multi-claw support foot for a swivel chair according to claim 3, characterized in that: A plurality of positioning buckles (33) are arranged in the assembly groove (32), and correspondingly, a corresponding positioning hole (21) is arranged on the support claw (2), and the positioning buckles (33) are inserted into the positioning holes (21) and connected thereto.

5. The multi-claw support foot for a swivel chair according to claim 1, characterized in that: The decorative cover (4) is made of a stainless steel plate and is provided with flanges (41) on both sides thereof. The flanges (41) are buckled onto the lower end surface of the plastic shell (3) and are connected and fixed thereto.

6. The multi-claw support foot for a swivel chair according to claim 1, characterized in that: A caster seat (22) is embedded in the top of the supporting claw (2).

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