A moveable rotating office chair support foot

Abstract

This utility model discloses a movable and rotatable office chair support leg, relating to the field of office chair technology. The utility model includes a modular support leg comprising a base, casters mounted below the ends of each branch of the base, a footrest ring fixed to the lower middle position of each branch of the base, a bearing seat mounted at the upper center of the base, a sleeve fixed to the bearing seat by a lower locking knob, a support column mounted inside the sleeve by an upper locking knob, a tray fixed to the top of the support column, and a mounting ring fixed to the edge of the tray. This utility model, through the use of an arc-shaped support arm base with casters, a rotating structure integrating rolling bearings, a height-adjustable support column with a strip-shaped limit strip, upper and lower locking knobs, and an annular footrest ring covered with an anti-slip rubber layer, achieves omnidirectional flexible movement, 360° smooth rotation, reliable height adjustment, structural stability during use, and comfortable leg support for users during prolonged sitting.

Description

Technical Field

[0001] This utility model belongs to the field of office chair technology, and in particular relates to a movable and rotatable office chair support leg. Background Technology

[0002] In modern office environments, office chairs, as frequently used furniture, directly impact users' work efficiency and health due to their comfort, flexibility, and stability. Traditional office chairs often use a fixed five-claw structure for their legs, with casters at the bottom for movement. While some products offer swivel and height adjustment functions, they generally suffer from problems such as a simple structure, inconvenient adjustment, uneven rotation, and lack of foot support. Especially during prolonged use, the user's legs dangling can lead to poor blood circulation and fatigue. Furthermore, existing height adjustment locking mechanisms often slip due to loose structures or insufficient friction, posing safety hazards. In addition, most products have not optimized rotating components, which can easily cause wobbling or abnormal noises after long-term use, affecting the user experience.

[0003] To address this issue, we provide a movable and rotatable office chair support leg. Utility Model Content

[0004] The purpose of this utility model is to provide a movable and rotatable office chair support leg. By integrating universal wheels, foot pedal rings, bearing rotation structure and height-adjustable locking mechanism on the base, it solves the problems of existing office chair support legs, such as single function, uneven rotation, unreliable height adjustment, lack of foot support and poor comfort during long-term use.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a movable and rotatable office chair support leg, comprising a combined support leg, which includes a base, casters installed below the ends of each branch of the base, foot pedal rings fixed at the lower middle position of each branch of the base, a bearing seat installed at the upper center of the base, a sleeve fixed to the bearing seat by a lower locking knob, a support column installed inside the sleeve by an upper locking knob, a tray fixed to the top of the support column, and a mounting ring fixed to the edge of the tray.

[0007] The present invention is further provided in that the support column is integrally provided with strip-shaped limiting strips at equal intervals on its periphery, and the strip-shaped limiting strips match the strip-shaped grooves inside the sleeve.

[0008] The present invention is further configured such that the lower locking knob and the upper locking knob are provided with anti-slip textures at equal intervals on their circumferences, the lower locking knob is threadedly fitted to the center of the circumference of the bearing seat, and the upper locking knob is threadedly fitted to the upper circumference of the sleeve.

[0009] The present invention is further configured such that the base has multiple branches around its periphery, each branch being an arc-shaped support arm, and a circular groove for mounting a foot pedal ring is formed at the lower middle position of the arc-shaped support arm, the foot pedal ring being welded to the inside of each circular groove.

[0010] The present invention is further configured such that the foot pedal ring is a closed annular metal tube, and the surface of the foot pedal ring is covered with an anti-slip rubber layer.

[0011] The present invention is further configured such that a rolling bearing is embedded inside the bearing housing, the inner ring of the rolling bearing is interference-fitted with the outer wall of the sleeve, and the outer ring is fixedly connected to the inner wall of the bearing housing.

[0012] This utility model has the following beneficial effects:

[0013] 1. This utility model precisely matches the strip-shaped limiting strip on the outer periphery of the support column with the strip-shaped groove on the inner wall of the sleeve, allowing the support column to slide axially while completely restricting its circumferential rotation, ensuring that the seat posture is always horizontal and stable; coupled with the threaded clamping mechanism of the locking knob, the user can flexibly adjust the seat height according to their height or the height of the workbench, and lock it firmly with the knob to prevent accidental slippage during use, thus improving safety and adaptability.

[0014] 2. This utility model significantly reduces rotational resistance by setting a bearing seat with a built-in rolling bearing in the center of the base and forming an interference fit rotating pair with the sleeve. This allows users to achieve smooth and quiet omnidirectional rotation of the chair with only slight force, meeting the needs of frequent turning to retrieve items and communicate in office scenarios. At the same time, it avoids the jamming or abnormal noise problems caused by high friction in traditional structures.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the upper part of the overall structure of a movable and rotatable office chair support leg.

[0018] Figure 2 This is a schematic diagram of the lower part of the overall structure of a movable and rotatable office chair support leg.

[0019] Figure 3 This is a front view of the overall structure of a movable and rotatable office chair support leg.

[0020] Figure 4This is a top view of the overall structure of a movable and rotatable office chair support leg.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 100. Modular support foot; 101. Base; 102. Foot ring; 103. Caster wheel; 104. Bearing seat; 105. Lower locking knob; 106. Sleeve; 107. Upper locking knob; 108. Support column; 109. Tray; 110. Mounting ring. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Example

[0025] Please see Figure 1-4 This utility model is a movable and rotatable office chair support leg, including a combined support leg 100. The combined support leg 100 includes a base 101, universal wheels 103 installed below the ends of each branch of the base 101, foot rings 102 fixed at the lower part of the middle position of each branch of the base 101, a bearing seat 104 installed at the upper center position of the base 101, a sleeve 106 fixed to the bearing seat 104 by a lower locking knob 105, a support column 108 installed inside the sleeve 106 by an upper locking knob 107, a tray 109 fixed to the top of the support column 108, and a mounting ring 110 fixed to the side of the tray 109.

[0026] Specifically, the support column 108 is integrally provided with strip-shaped limiting strips at equal intervals on its periphery, and the strip-shaped limiting strips match the strip-shaped grooves inside the sleeve 106; the lower locking knob 105 and the upper locking knob 107 are provided with anti-slip textures at equal intervals on their periphery, the lower locking knob 105 is threaded to the center of the periphery of the bearing seat 104, and the upper locking knob 107 is threaded to the upper periphery of the sleeve 106; a rolling bearing is embedded inside the bearing seat 104, the inner ring of the rolling bearing is interference-fitted with the outer wall of the sleeve 106, and the outer ring is fixedly connected to the inner wall of the bearing seat 104.

[0027] Furthermore, the base 101 has multiple branches around its periphery, each branch being an arc-shaped support arm. A circular groove for mounting a foot pedal ring 102 is formed at the lower center of the arc-shaped support arm, and the foot pedal ring 102 is welded into the inside of each circular groove. The foot pedal ring 102 is a closed annular metal tube, and the surface of the foot pedal ring 102 is covered with an anti-slip rubber layer.

[0028] The movable and rotatable office chair support leg provided in this embodiment has components that work together to achieve multi-directional movement, free rotation, and comfortable support during use. Specifically, the modular support leg 100 uses the base 101 as its core frame, with multiple arc-shaped support arms extending from its periphery as branch structures. This not only enhances the overall rigidity and bending resistance but also provides a mounting base for other functional components through a reasonable spatial layout. Universal wheels 103 are installed at the lower end of each arc-shaped support arm, enabling the entire support leg to move in all directions, allowing users to flexibly adjust its position within the office area. Footrest rings 102, located at the lower part of each branch, are welded and fixed within circular grooves in the support arms, forming a closed annular metal tube structure. These rings are covered with an anti-slip rubber layer, improving user comfort and safety when resting their feet and avoiding the cold feeling or slippage risk associated with direct metal contact.

[0029] Regarding vertical support and rotation, a bearing seat 104 is located at the center of the upper part of the base 101, inside which a rolling bearing is embedded. The outer ring of the bearing is fixedly connected to the inner wall of the bearing seat 104, while the inner ring is interference-fitted with the outer wall of the sleeve 106, thus creating a low-friction, high-stability rotating pair. This allows the sleeve 106 to rotate freely in the horizontal plane, achieving the 360° rotation function of the office chair. The sleeve 106 is connected to the bearing seat 104 via a lower locking knob 105. This knob is adapted to the thread in the center of the circumference of the bearing seat 104. Tightening it restricts the axial displacement of the sleeve 106, ensuring the stability and reliability of the rotation structure. At the same time, the sleeve 106 has a guide structure inside that matches the support column 108. Specifically, the equidistant, integrally formed strip-shaped limiting strips on the circumference of the support column 108 precisely match the strip-shaped grooves on the inner wall of the sleeve 106. This allows the support column 108 to slide axially to adjust the height while preventing circumferential rotation, thereby ensuring the stability of the chair surface posture. The height adjustment of the support column 108 is controlled by the upper locking knob 107, which is threaded to the upper part of the sleeve 106. After tightening, the support column 108 is pressed to lock it. When loosened, it can slide up and down to adjust the height, meeting the needs of users of different heights. Both the upper locking knob 105 and the lower locking knob 107 have continuous anti-slip textures on their sides, which facilitates operation by hand and enhances grip.

[0030] Finally, a tray 109 is fixed to the top of the support column 108 for connecting the main body of the chair seat, and the mounting ring 110 on its side provides a standardized interface for the assembly of the bottom of the chair seat, which facilitates quick installation and disassembly.

[0031] The operation process of this embodiment is as follows: First, the base 101 is used as the basic component of the entire support structure. The whole structure is star-shaped, with five arc-shaped support arms extending evenly around the perimeter. The support arms are symmetrically distributed to ensure balanced force. Universal wheels 103 are installed below the end of each arc-shaped support arm by bolts or rivets to enable flexible movement of the office chair on the ground. At the same time, a circular groove is pre-cut in the middle of the lower part of each arc-shaped support arm. The closed ring foot pedal 102 is precisely embedded and welded into the circular groove. The foot pedal 102 is made of stainless steel tube and covered with a layer of anti-slip rubber of appropriate thickness, which not only enhances the comfort of foot support but also effectively prevents slipping, meeting the user's need for foot relaxation during long-term office work.

[0032] Subsequently, a bearing housing 104 is installed at the center of the upper part of the base 101. A deep groove ball bearing is precisely embedded inside the bearing housing 104. Its outer ring is interference-fitted with the inner wall of the bearing housing 104, while its inner ring forms a tight interference fit with the outer wall of the sleeve 106, thus forming a stable rotational support structure. The sleeve 106 is a hollow cylindrical component with a smooth outer wall and several axially oriented slots on its inner wall that match the support column 108. The support column 108 is made of high-strength steel pipe, and several vertical strip-shaped limiting strips are integrally formed at equal intervals on its outer circumference. When the support column 108 is inserted into the sleeve 106, the limiting strips fit precisely into the corresponding slots, ensuring that the support column 108 can only slide axially and cannot rotate, while also ensuring... To ensure smooth and stable lifting and lowering, the lower locking knob 105 is screwed in laterally from the middle of the side wall of the bearing seat 104 and engages with the radial through hole or groove at the bottom of the sleeve 106. After tightening, it can limit the axial movement of the sleeve 106 relative to the bearing seat 104 and prevent loosening during rotation. The height adjustment of the support column 108 is controlled by the upper locking knob 107, which is screwed in from the upper side wall of the sleeve 106 and directly presses against the outer wall of the support column 108. When loosened, the support column 108 is allowed to slide up and down, and when tightened, it is firmly locked at the desired height. For ease of operation, the outer circumference of both the upper locking knob 105 and the lower locking knob 107 is machined with continuous anti-slip texture to improve friction and ease of operation when hand-tightening.

[0033] Finally, the tray 109 is fixed to the top of the support column 108 by welding or threaded connection. The tray 109 is typically a circular or pentagonal metal plate used to support the gas spring or seat base of the office chair. The edge of the tray 109 has an upward-protruding mounting ring 110, which matches the standard interface (such as BIFMA specification) at the bottom of the seat, and can be quickly assembled by screws or snap-fit ​​structures. After the entire support leg is assembled, the user can sit on the chair and enjoy multiple functions such as 360° free rotation, smooth multi-directional movement, flexible height adjustment, and comfortable foot support, fully meeting the comprehensive needs of modern office environments for chair functionality, stability, and ergonomics.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A movable and rotatable office chair support leg, comprising a combined support leg (100), characterized in that: The combined support foot (100) includes a base (101), casters (103) installed below the ends of each branch of the base (101), foot rings (102) fixed at the lower middle position of each branch of the base (101), bearing seats (104) installed at the upper center of the base (101), sleeves (106) fixed to the bearing seats (104) by a lower locking knob (105), a support column (108) installed inside the sleeve (106) by an upper locking knob (107), a tray (109) fixed to the top of the support column (108), and a mounting ring (110) fixed to the side of the tray (109).

2. The movable and rotatable office chair support leg according to claim 1, characterized in that, The support column (108) is integrally provided with strip-shaped limiting strips at equal intervals on its periphery, and the strip-shaped limiting strips match the strip-shaped grooves inside the sleeve (106).

3. The movable and rotatable office chair support leg according to claim 1, characterized in that, The lower locking knob (105) and the upper locking knob (107) are provided with anti-slip textures at equal intervals on their periphery. The lower locking knob (105) is threadedly fitted to the center periphery of the bearing seat (104), and the upper locking knob (107) is threadedly fitted to the upper periphery of the sleeve (106).

4. The movable and rotatable office chair support leg according to claim 1, characterized in that, The base (101) has multiple branches around its periphery, each branch being an arc-shaped support arm. A circular groove for mounting a foot pedal ring (102) is provided at the lower middle position of the arc-shaped support arm, and the foot pedal ring (102) is welded to the inside of each circular groove.

5. A movable and rotatable office chair support leg according to claim 1, characterized in that, The foot pedal ring (102) is a closed annular metal tube, and the surface of the foot pedal ring (102) is covered with an anti-slip rubber layer.

6. The movable and rotatable office chair support leg according to claim 1, characterized in that, The bearing housing (104) is equipped with a rolling bearing. The inner ring of the rolling bearing is interference-fitted with the outer wall of the sleeve (106), and the outer ring is fixedly connected to the inner wall of the bearing housing (104).

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