Compression-resistant and wear-resistant office chair five-star foot

Abstract

The utility model relates to the technical field of office chair accessories, in particular to a compression-resistant and wear-resistant five-star foot of an office chair. Comprising a five-star foot base, sliding clamping grooves are formed in the bottoms of the ends of five supporting legs of the five-star foot base, trundle top plates are clamped in the sliding clamping grooves, fixing bases are rotationally connected to the bottoms of the trundle top plates through rotating shafts, and movable trundles are installed in the fixing bases; fixing grooves are formed in the tops of the five supporting leg ends of the five-star foot base, and limiting locking mechanisms matched with the trundle top plates are arranged in the fixing grooves. The five-star foot structure provided by the utility model has compression-resistant and wear-resistant characteristics and a convenient disassembly function, and the maintenance process is simplified and the use cost is reduced while the running stability of the trundle is ensured, so that the overall practicability and economical efficiency of the office chair are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of office chair accessories, and in particular to a pressure-resistant and wear-resistant five-star base for office chairs. Background Technology

[0002] Modern office chairs widely adopt a five-star base structure, consisting of five radially distributed legs that provide stable support. For ease of movement, traditional five-star bases typically have casters at the ends of the legs, allowing for flexible steering and sliding. However, in daily use, these casters are prone to wear, jamming, or breakage due to frequent contact with the ground, directly affecting the chair's mobility and safety. Currently, casters are often directly fixed to the legs by welding or bolts, making disassembly and replacement complex and often requiring specialized tools or complete replacement of the entire leg assembly, resulting in high maintenance costs and wasted resources.

[0003] To address the aforementioned issues, existing improvement solutions mostly focus on optimizing caster materials or reinforcing the structure, such as using wear-resistant rubber or adding metal edging. However, such designs can only delay caster wear and cannot fundamentally solve the pain point of inconvenient replacement. In addition, some detachable caster designs lack reliable locking mechanisms, resulting in insufficient stability after installation and easy loosening. Utility Model Content

[0004] This utility model provides a five-star base structure that combines pressure resistance and wear resistance with easy disassembly. While ensuring the stability of the casters, it simplifies the maintenance process and reduces the cost of use, thereby improving the overall practicality and economy of the office chair.

[0005] The technical solution adopted by this utility model is as follows: a pressure-resistant and wear-resistant office chair with a five-star base, wherein each of the five legs of the five-star base is provided with a sliding groove at the bottom and a caster top plate is engaged in the sliding groove; the bottom of the caster top plate is rotatably connected to a fixed seat through a rotating shaft; a movable caster is installed in the fixed seat; and each of the five legs of the five-star base is provided with a fixed groove at the top and a limiting locking mechanism that cooperates with the caster top plate is provided in the fixed groove.

[0006] As a further improvement of this utility model, the five legs of the five-star base are evenly arranged, and the legs are made of high-strength alloy material.

[0007] As a further improvement of this utility model, the limiting locking mechanism includes a fixed frame disposed at the top of the fixed groove and fixedly connected to the support leg. A connecting rod is provided on the top wall of the fixed frame. A movable plate located in the fixed groove is fixedly connected to the bottom of the connecting rod. A pull block is fixedly connected to the top of the connecting rod. Two locking blocks that pass through the support leg and the top plate of the caster are fixedly connected to the bottom of the movable plate.

[0008] As a further improvement of this utility model, the movable plate is connected to the top wall of the fixed frame by a spring sleeved on the outside of the connecting rod.

[0009] As a further improvement of this utility model, the support leg is provided with two through slots between the fixed slot and the sliding slot for the locking block to pass through.

[0010] As a further improvement of this utility model, the top plate of the caster is provided with two limiting holes for the locking block to pass through.

[0011] The beneficial effects of this utility model are as follows: Through the coordinated design of the sliding slot and the limiting locking mechanism, this utility model forms a modular connection structure between the caster top plate and the support leg that can be quickly disassembled and assembled. Simply operate the pull block to drive the locking block out of the limiting hole, and the caster top plate and the movable caster can be pulled out of the sliding slot as a whole. Caster replacement can be completed without the aid of tools, which greatly reduces the difficulty and cost of maintenance. At the same time, the continuous spring pressure on the locking block and the precise fit between the limiting hole and the locking block ensure the pressure resistance stability and wear resistance of the caster after installation, effectively avoiding the risk of loosening due to vibration or force during use, and significantly extending the overall service life of the five-star caster. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the five-star base of a pressure-resistant and wear-resistant office chair according to this utility model;

[0013] Figure 2 This utility model relates to a pressure-resistant and wear-resistant five-star base for office chairs. Figure 1 Another perspective illustration;

[0014] Figure 3 This is a partial sectional view of the five-star base of a pressure-resistant and wear-resistant office chair according to this utility model;

[0015] Figure 4 This is a partially exploded view of the five-star base of a pressure-resistant and wear-resistant office chair according to this utility model;

[0016] Figure 5 This utility model relates to a pressure-resistant and wear-resistant five-star base for office chairs. Figure 3 Schematic diagram of section A in the middle;

[0017] Figure 6This utility model relates to a pressure-resistant and wear-resistant five-star base for office chairs. Figure 4 Schematic diagram of section B in the middle.

[0018] As shown in the figure: 1. Support leg; 2. Sliding groove; 3. Caster top plate; 4. Rotary shaft; 5. Fixed base; 6. Movable caster; 7. Fixed groove; 8. Limit locking mechanism; 801. Fixed frame; 802. Connecting rod; 803. Movable plate; 804. Pull block; 805. Locking block; 806. Spring; 807. Through groove; 808. Limit hole. Detailed Implementation

[0019] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to their structure and are relative concepts. Therefore, they may vary depending on their location and usage; thus, these or other directional terms should not be interpreted as restrictive terms.

[0020] The singular forms “a,” “the,” and “the” used in this specification are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes one or more of the associated listed items, any or all possible combinations thereof.

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] This utility model provides the following: Figure 1-6 The five-star base of the pressure-resistant and wear-resistant office chair shown includes a five-star base. Each of the five legs 1 of the five-star base has a sliding groove 2 at its bottom, and a caster top plate 3 is locked in the sliding groove 2. The bottom of the caster top plate 3 is rotatably connected to a fixed seat 5 through a pivot 4. A movable caster 6 is installed in the fixed seat 5. Each of the five legs 1 of the five-star base has a fixed groove 7 at its top, and a limiting locking mechanism 8 that cooperates with the caster top plate 3 is provided in the fixed groove 7.

[0023] like Figure 1 , Figure 2 , Figure 4 As shown, the five legs 1 of the five-star base in this utility model are evenly arranged to ensure stable support of the seat. The legs 1 are made of high-strength alloy material, which has excellent pressure resistance and can withstand a large weight without easily deforming, thereby extending the service life of the five-star base.

[0024] like Figure 5 and Figure 6 As shown, the limiting locking mechanism 8 of this utility model includes a fixed frame 801 set at the top of the fixed groove 7 and fixedly connected to the support leg 1. A connecting rod 802 is provided on the top wall of the fixed frame 801. A movable plate 803 located in the fixed groove 7 is fixedly connected to the bottom of the connecting rod 802. A pull block 804 is fixedly connected to the top of the connecting rod 802. Two locking blocks 805 that pass through the support leg 1 and the top plate of the caster 3 are fixedly connected to the bottom of the movable plate 803. The movable plate 803 and the top wall of the fixed frame 801 are connected by a spring 806 sleeved on the outside of the connecting rod 802. Two through grooves 807 for the locking blocks 805 to pass through are provided on the support leg 1 between the fixed groove 7 and the sliding groove 2. Two limiting holes 808 for the locking blocks 805 to pass through are provided on the top plate of the caster 3.

[0025] Working Principle: In practical implementation, when it is necessary to install or remove the movable caster 6, the user can pull the pull block 804 upwards. The pull block 804 drives the connecting rod 802 to move along the through hole on the top wall of the fixed frame 801, thereby causing the movable plate 803 to move upwards against the elastic force of the spring 806. As the movable plate 803 rises, the locking block 805 disengages from the limiting hole 808 on the caster top plate 3. At this time, the caster top plate 3 and the movable caster 6 on it are no longer constrained by the limiting locking mechanism 8 and can be slid out along the direction of the sliding groove 2, realizing quick disassembly. Conversely, when it is necessary to reinstall the caster top plate 3 and the movable caster 6 back onto the support leg 1, simply slide the corresponding end of the caster top plate 3 into the sliding groove 2 until the locking block 805 is aligned with the limiting hole 808. Then, release the pull block 804, and the elastic force of the spring 806 will push the movable plate 803 and the locking block 805 down into the limiting hole 808, thereby achieving a stable lock on the caster top plate 3 and completing the installation process.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pressure-resistant and wear-resistant type of five-star base for office chair, comprising a five-star base pedestal, characterized in that: The bottom of the five legs (1) of the five-star foot base is provided with a sliding clamping groove (2), and a caster top plate (3) is clamped in the sliding clamping groove (2); the bottom of the caster top plate (3) is rotationally connected with a fixing seat (5) through a rotating shaft (4); the fixing seat (5) is internally provided with a movable caster (6); the top of the five legs (1) of the five-star foot base is provided with a fixing groove (7), and the fixing groove (7) is provided with a limiting locking mechanism (8) matched with the caster top plate (3).

2. The anti-pressure wear-resistant type office chair five-star foot according to claim 1, characterized in that: The five legs (1) of the five-star foot base are uniformly arranged, and the legs (1) are made of high-strength alloy material.

3. The compression-resistant and wear-resistant five-star base for office chairs according to claim 1, characterized in that: The limiting locking mechanism (8) comprises a fixing frame (801) provided at the top of the fixing groove (7) and fixedly connected with the leg (1); a connecting rod (802) is penetratingly arranged on the top wall of the fixing frame (801); the bottom of the connecting rod (802) is fixedly connected with a movable plate (803) located in the fixing groove (7); the top of the connecting rod (802) is fixedly connected with a pull block (804); and the bottom of the movable plate (803) is fixedly connected with two locking blocks (805) penetrating through the leg (1) and the caster top plate (3).

4. The compression-resistant and wear-resistant five-star base for office chairs according to claim 3, characterized in that: The movable plate (803) and the top wall of the fixing frame (801) are connected through a spring (806) sleeved on the outer side of the connecting rod (802).

5. The compression-resistant and wear-resistant five-star base for office chairs according to claim 3, characterized in that: Two through grooves (807) for the locking blocks (805) to penetrate through are arranged on the leg (1) between the fixing groove (7) and the sliding clamping groove (2).

6. The compression-resistant and wear-resistant five-star base for office chairs according to claim 3, characterized in that: Two limiting holes (808) for the locking blocks (805) to penetrate through are arranged on the caster top plate (3).

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