Multifunctional foldable office chair
By designing foldable chair leg components and a linkage gear structure, the stability and comfort issues of the office chair when tilted for rest have been resolved, thus improving the stability and comfort of the office chair during tilting for rest and transportation.
Patent Information
- Application Number
- CN202520440105.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-03-13
AI Technical Summary
When the existing office chair is tilted for rest, the user's center of gravity is higher than that of the stool, which poses a risk of tipping over, and the user experience is poor when it is in a semi-suspended state.
Design a multifunctional foldable office chair. The chair legs can be folded parallel by a folding leg assembly, increasing the contact area with the ground. The stability of the chair legs and the limitation of the connecting plate are ensured by a linkage gear structure and a slot structure, thus optimizing the center of gravity distribution.
It reduces the risk of tipping over, improves the stability and comfort of the chair, and reduces the space required for movement, making it suitable for quick switching between office and rest scenarios.
Smart Images
Figure CN223640397U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of office chair technology, and in particular to a multifunctional foldable office chair. Background Technology
[0002] An office chair is a chair used for sitting while working in an office or workplace. Its primary design purpose is to provide a comfortable sitting posture, thereby helping to improve work efficiency and reduce physical discomfort caused by prolonged sitting.
[0003] Currently, during office work, especially during lunch breaks, office chairs are often positioned so that the backrest is at an angle greater than 90 degrees to the base for better rest. However, when users are reclining, their center of gravity is often higher than the center of gravity of the chair, which may cause them to tip over. Moreover, resting in a semi-suspended state results in a poor user experience. Therefore, there is an urgent need for a multifunctional foldable office chair to solve these problems. Utility Model Content
[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a multifunctional foldable office chair where, when the user is resting at an angle, their center of gravity is often higher than the center of gravity of the bench, which may cause it to tip over. Moreover, when resting in a semi-suspended state, the user experience is poor.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a multifunctional foldable office chair, including a base, an office chair back rotatably connected to one side of the base, and a folding chair leg assembly;
[0006] The folding chair leg assembly includes two office chair legs arranged parallel to each other at the bottom of the base. The two office chair legs are rotatably connected to the bottom of the base via the bracket. The bottom of the base has a second slot for the office chair legs to be folded and inserted.
[0007] The support component is provided with a linkage gear structure, which is used to control the synchronous opening and closing of the two office chair legs. The interior of the second slot is provided with an elastic limiting protrusion for limiting the position of the office chair legs.
[0008] Preferably, each of the two office chair legs has a first slot, and the two first slots are connected by the connecting plate.
[0009] Preferably, a first clip is welded to each end of the connecting plate, the two first clips are stepped with the connecting plate, a second clip is welded parallel to the middle of the connecting plate, and a groove is provided between the two second clips.
[0010] Preferably, when the two office chair legs are in the state of supporting the base, the two first clips are respectively locked inside the corresponding first clip slots. When the two office chair legs are locked inside the corresponding second clip slots, the two second clips can be locked inside the corresponding first clip slots. At this time, the two first clip slots are set inside the grooves.
[0011] Preferably, a mesh element is provided in the middle of the office chair back, and a headrest for supporting the head is provided at the upper end of the office chair back.
[0012] Preferably, a cushion is fixedly provided on the upper end of the base, and the upper surface of the cushion has a cushion groove that conforms to the buttocks.
[0013] Preferably, a second handle is rotatably connected to both sides of the seat cushion, and a first handle is rotatably connected to the end of each of the two second handles that is away from the seat cushion. The ends of the two first handles that are away from the connection with the second handles are rotatably connected to both sides of the back of the office chair.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This multifunctional foldable office chair, by setting the foldable chair legs of the folding chair leg assembly to be parallel to the base, lowers the user's center of gravity when resting, thereby reducing the risk of tipping over due to an excessively high center of gravity. Furthermore, by using the sides of the two chair legs instead of the original bottom surface for support, the contact area between the chair legs and the ground is increased, thus improving the overall stability of the chair legs. In short, the foldable chair legs not only eliminate the discomfort of resting in a semi-suspended state but also increase the contact area between the chair and the ground, enhancing the chair's stability.
[0016] 2. The multifunctional foldable office chair restricts the position of the first slot by setting two second clips in the connecting plate, thereby keeping the two chair legs stably locked into the second slot, thus reducing the transfer space required during the transfer of the office chair, and facilitating the transfer of the office chair.
[0017] 3. In this multifunctional foldable office chair, the first clips at both ends of the connecting plate can be used to lock between the two office chair legs when the two office chair legs are set in parallel, thereby restricting the position of the office chair legs and ensuring the stability of the office chair legs when supporting the office chair.
[0018] 4. This multifunctional foldable office chair, by setting the seat cushion groove on the seat cushion, the seat cushion groove is designed to fit the user's buttocks, thereby increasing the contact area between the user and the seat cushion, thereby enhancing the comfort of the office chair. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the folded state of the office chair legs at the bottom of the base of this utility model;
[0022] Figure 3 This is a schematic diagram of the overall base of this utility model;
[0023] Figure 4 This is a schematic diagram of the overall connecting plate of this utility model;
[0024] Figure 5 This is a schematic diagram of the second slot on the base of this utility model.
[0025] Reference numerals: 1. Headrest; 2. Mesh component; 3. Office chair back; 4. First handle component; 5. Second handle component; 6. Seat cushion; 7. Base; 8. Office chair leg; 9. Seat cushion groove; 10. Support component; 101. Linkage gear structure; 11. First locking component; 12. Connecting plate; 13. Second locking component; 14. First slot; 15. Groove; 16. Second slot; 161. Elastic limiting protrusion. Detailed Implementation
[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.
[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0030] Please see Figure 1-5 This utility model provides a technical solution: an office chair, including: a base 7, an office chair back 3 rotatably connected to one side of the base 7, and a folding chair leg assembly;
[0031] The folding chair leg assembly includes two office chair legs 8 arranged parallel to each other at the bottom of the base 7. The two office chair legs 8 are rotatably connected to the bottom of the base 7 via the bracket 10. The bottom of the base 7 is provided with a second slot 16 for the office chair legs 8 to be folded and inserted.
[0032] By folding the two office chair legs 8 in the folding chair leg assembly parallel to the base 7, the user's center of gravity is lowered when resting, thus reducing the risk of tipping over due to a high center of gravity. Furthermore, by using the sides of the two office chair legs 8 instead of the original bottom surface for support, the contact area between the office chair legs 8 and the ground is increased, thereby improving the overall stability of the office chair legs 8. In short, the folding capability of the office chair legs 8 not only eliminates the discomfort of resting in a semi-suspended state but also increases the contact area between the chair and the ground, enhancing the chair's stability.
[0033] In a specific embodiment, the implementation process is as follows:
[0034] The support frame 10 features a dual-axis design. Each office chair leg 8 is connected to the base 7 via two sets of pivots, including a main pivot: a 12mm diameter stainless steel pivot with its axis parallel to the base plane (X-axis direction), and a secondary pivot: an 8mm diameter eccentric pivot with its axis at a 15° angle to the main pivot, forming a composite rotation trajectory.
[0035] During motion trajectory control, the chair legs rotate 90° around the main pivot when unfolded, while the secondary pivot pushes the chair legs outward by 20mm, forming a self-stabilizing triangular support. During snap-fit positioning, the three-dimensional structure of the second slot 16 allows the slot to adopt a 3D curved surface design, including: a storage section (50mm wide × 30mm deep), a section to accommodate the chair leg body when folded, and a limiting boss (5mm high) to prevent the chair legs from sliding. The magnetic module (N35 neodymium iron boron magnet) generates a 1.2kg suction force to assist in fixation.
[0036] When reinforcing the side walls of chair leg 8, a 15mm wide 6061 aluminum alloy edging is added to the side in contact with the ground to form an extended support surface, increasing the ground contact width from 25mm to 40mm. Pressing the spring pin at the chair leg connection (8mm travel, 3N spring force) releases the storage fixation. When chair leg 8 is pulled down to the 60° position, the secondary pivot triggers the limit block to automatically lock. The anti-slip pads (Shore A 70A silicone) on the side of the chair leg contact the ground.
[0037] The support span has been extended from 600mm to 820mm, and the ground contact area has increased the single-leg contact surface from 120cm² to 300cm². When folded in storage / resting mode, follow these steps:
[0038] Step 1: Unlock the flip
[0039] Move the release lever at the top of the chair leg upwards to release the secondary pivot limit;
[0040] Step 2: Rotate storage
[0041] The chair leg 8 rotates along the main axis towards the base and is precisely inserted into the second slot 16 under magnetic attraction.
[0042] Step 3: Morphological Transformation
[0043] When folded, the overall height is reduced from 980mm to 450mm, and the center of gravity height is reduced by 53%.
[0044] The details of the stability enhancement technology after 3 hours of testing are shown in Table 1:
[0045] Table 1 Test Information Table When folded, the overall center of gravity of the seat is lowered from 650mm to 300mm. Through optimized mass distribution, a counterweight (2kg cast iron, 250mm from the ground) is embedded in the base 7, and the backrest 3 can tilt forward 15° to fit against the base, further lowering the center of gravity. In the friction-enhancing design, 3mm deep interlaced grooves are set on the sides of the chair legs, increasing the coefficient of friction from 0.3 to 0.6. The contact surface pressure distribution is optimized through finite element analysis, reducing the ground pressure from 12N / cm² to 5N / cm².
[0046] A Hall sensor is integrated inside the support component 10 to detect the leg angle: 0-30° indicates a folded-down state, automatically disabling backrest adjustment; 30-90° indicates office mode, enabling 0-120° backrest tilt adjustment. In the unfolded state, the legs 8 form a 75° angle with the ground, ensuring the knee joint is at the optimal 105° angle when seated. When folded, the seat cushion is lowered by 40mm via a linkage rod, creating a reclining chair posture. In a further embodiment, a nitrogen spring assist device (200N thrust) is used to reduce the leg unfolding time from 3 seconds to 0.8 seconds. An audio-visual prompt system (LED green / red light + buzzer sound) provides real-time feedback on the operation status.
[0047] In case of overload protection, a shear pin (with an ultimate shear force of 600N) is installed at the pivot of the support component 10. When the lateral impact force exceeds the limit, it will preferentially break to protect the main structure. When folding the chair legs, the safety buttons on both sides must be pressed simultaneously to prevent accidental folding on one side. In the unfolded state, the wedge-shaped locking block at the secondary pivot generates a self-amplifying force effect under pressure, and the load-bearing capacity increases with the load.
[0048] This design, through precise mechanical linkage and mechanics optimization, improves the stability of the office chair in its unfolded state by 210% compared to traditional structures, while achieving a form transformation within 3 seconds. When folded, its volume is reduced by 58%, allowing for vertical storage against a wall (requiring only 180mm of depth), perfectly solving the need for rapid switching between office and rest scenarios.
[0049] Each of the two office chair legs 8 has a first slot 14, and the two first slots 14 are connected by the connecting plate 12.
[0050] The two ends of the connecting plate 12 are respectively welded with first clips 11, and the two first clips 11 are stepped with the connecting plate 12. The middle position of the connecting plate 12 is parallel to the second clip 13, and a groove 15 is provided between the two second clips 13.
[0051] When the two office chair legs 8 are supporting the base 7, the two first clips 11 are respectively clipped into the corresponding first clip slots 14. When the two office chair legs 8 are clipped into the corresponding second clip slots 16, the two second clips 13 can be clipped into the corresponding first clip slots 14. At this time, the two first clip slots 14 are set inside the grooves 15.
[0052] The office chair back 3 has a mesh 2 in the middle and a headrest 1 for supporting the head at the upper end.
[0053] A cushion 6 is fixedly installed on the upper end of the base 7, and a cushion groove 9 that conforms to the buttocks is opened on the upper surface of the cushion 6.
[0054] The seat cushion 6 is rotatably connected to two sides of a second handle 5. The two second handles 5 are rotatably connected to a first handle 4 at the ends opposite to the seat cushion 6. The ends of the two first handles 4 opposite to the connection with the second handles 5 are rotatably connected to the two sides of the office chair back 3.
[0055] It should be noted that: in its initial state, the office chair is in... Figure 1 state.
[0056] When the user wants to recline and rest;
[0057] First, the connecting plate 12 is moved by an external force. The movement of the connecting plate 12 causes the first locking pieces 11 at both ends to move and disengage from the corresponding first locking slots 14. Then, the two office chair legs 8 are moved by an external force and respectively locked into the corresponding second locking slots 16. Finally, the two office chair legs 8 are brought into contact with the ground.
[0058] Secondly, the angle between the office chair back 3 and the seat cushion 6 is set to be greater than 90° by external force.
[0059] When the office chair needs to be transported;
[0060] First, the connecting plate 12 is moved by an external force. The movement of the connecting plate 12 causes the first locking pieces 11 at both ends to move and disengage from the corresponding first locking slots 14. Then, the two office chair legs 8 are moved by an external force and respectively locked into the corresponding second locking slots 16. Subsequently, the connecting plate 12 is moved by an external force. The movement of the connecting plate 12 causes the two second locking pieces 13 to move and respectively lock into the corresponding first locking slots 14. At the same time, the two first locking slots 14 are disposed inside the groove 15.
[0061] By setting two second clips 13 in the connecting plate 12 to restrict the position of the first slot 14, the two office chair legs 8 are stably locked into the interior of the second slot 16, thereby reducing the transfer space required during the transfer of the office chair, thus facilitating the transfer of the office chair.
[0062] The first clips 11 at both ends of the connecting plate 12 can be used to lock between the two office chair legs 8 when the two office chair legs 8 are arranged in parallel, thereby restricting the position of the office chair legs 8 and ensuring the stability of the office chair legs 8 when supporting the office chair.
[0063] By providing the seat cushion groove 9 on the seat cushion 6, which is designed to fit the user's buttocks, the contact area between the user and the seat cushion 6 is increased, thereby enhancing the comfort of the office chair.
[0064] In practical operation, the basic working principle of this utility model is as follows:
[0065] When the user wants to recline and rest, the connecting plate 12 is moved by external force. The movement of the connecting plate 12 causes the first locking pieces 11 at both ends to move and disengage from the corresponding first locking slots 14. Then, the two office chair legs 8 are moved by external force and respectively locked into the corresponding second locking slots 16. Finally, the two office chair legs 8 are brought into contact with the ground.
[0066] Secondly, the angle between the office chair back 3 and the seat cushion 6 is set to be greater than 90° by external force.
[0067] When the office chair needs to be transported;
[0068] First, the connecting plate 12 is moved by an external force. The movement of the connecting plate 12 causes the first locking pieces 11 at both ends to move and disengage from the corresponding first locking slots 14. Then, the two office chair legs 8 are moved by an external force and respectively locked into the corresponding second locking slots 16. Subsequently, the connecting plate 12 is moved by an external force. The movement of the connecting plate 12 causes the two second locking pieces 13 to move and respectively lock into the corresponding first locking slots 14. At the same time, the two first locking slots 14 are disposed inside the groove 15.
[0069] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A multifunctional foldable office chair, characterized in that, include: The base (7), the office chair back (3) rotatably connected to one side of the base (7), and the folding chair leg assembly; The folding chair leg assembly includes two office chair legs (8) arranged parallel to the bottom of the base (7). The two office chair legs (8) are rotatably connected to the bottom of the base (7) through the bracket (10). The bottom of the base (7) is provided with a second slot (16) into which the office chair legs (8) can be folded and inserted. The bracket (10) is provided with a linkage gear structure (101), which is used to control the two office chair legs (8) to open and close synchronously. The second slot (16) is provided with an elastic limiting protrusion (161) for limiting the position of the office chair legs (8).
2. The multifunctional foldable office chair according to claim 1, characterized in that: Each of the two office chair legs (8) is provided with a first slot (14), and the two first slots (14) are connected by the connecting plate (12).
3. A multifunctional foldable office chair according to claim 2, characterized in that: The two ends of the connecting plate (12) are respectively welded with first clips (11), and the two first clips (11) are stepped with the connecting plate (12). The middle position of the connecting plate (12) is parallel to the second clip (13), and a groove (15) is provided between the two second clips (13).
4. A multifunctional foldable office chair according to claim 2, characterized in that: When the two office chair legs (8) are in the state of supporting the base (7), the two first clips (11) are respectively clipped into the corresponding first slot (14). When the two office chair legs (8) are clipped into the corresponding second slot (16), the two second clips (13) can be clipped into the corresponding first slot (14). At this time, the two first slots (14) are set inside the groove (15).
5. A multifunctional foldable office chair according to claim 1, characterized in that: The backrest (3) of the office chair has a mesh piece (2) in the middle and a headrest (1) for supporting the head at the upper end.
6. A multifunctional foldable office chair according to claim 1, characterized in that: A cushion (6) is fixedly installed on the upper end of the base (7), and a cushion groove (9) that fits the buttocks is opened on the upper surface of the cushion (6).
7. A multifunctional foldable office chair according to claim 6, characterized in that: The seat cushion (6) is rotatably connected to two second handle pieces (5) on both sides. The two second handle pieces (5) are rotatably connected to a first handle piece (4) at the end opposite to the seat cushion (6). The two first handle pieces (4) are rotatably connected to the two sides of the office chair back (3) at the end opposite to the connection with the second handle piece (5).