An ergonomic office chair with adjustable lumbar support

Abstract

The utility model provides an ergonomics office chair with adjustable lumbar support, comprising a seat base, a seat backrest is installed on one side of the seat base, a mounting shell is fixedly connected on one side of the seat backrest, two storage sleeves are fixedly connected on the lower side of the inner wall of the mounting shell, a lifting plate is slidingly matched with the inner wall of the storage sleeve, and ratchet grooves are formed on the two sides of the storage sleeve. By setting the slidable lifting plate, the wavy tooth-shaped ratchet groove and the arc-shaped extrusion groove, and the matched movable connecting rod, clamping rod and elastic buckle, multi-gear precise adjustment of the height of the lumbar support is realized, which can be operated without getting up. When the height is adjusted downward, the lumbar support can be unlocked and slid by pulling it to the top end. The utility model effectively improves the poor convenience of adjusting the lumbar support of the traditional seat, can be adapted to users of different heights and sitting habits, provides precise fitting support for the waist, and improves the condition of long sitting, waist fatigue, insufficient support or discomfort caused by excessive pressure.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, specifically to an ergonomic office chair with an adjustable lumbar support. Background Technology

[0002] In modern office settings, office chairs are frequently used equipment, and their lumbar support performance is directly related to the user's comfort and health during prolonged sitting. Currently, most traditional office chairs on the market lack a dedicated lumbar support structure and rely solely on the fixed curved surface of the backrest to achieve a basic fit. However, such curved surfaces are mostly produced using standardized molds, which cannot adapt to the needs of different users. Even if some chairs add simple lumbar pillows, they are mostly fixed designs integrated with the backrest.

[0003] As office hours increase, users often experience fatigue symptoms such as lower back pain and stiffness due to insufficient lumbar support. Over time, this may exacerbate the pressure on the intervertebral discs, increasing the risk of lumbar muscle strain and lumbar degeneration. At the same time, existing support methods that rely on the curvature of the backrest can only provide limited passive support for the lower back and cannot adjust the support position according to the user's height, weight, and sitting posture, resulting in limited support effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an ergonomic office chair with an adjustable lumbar support to solve the problems mentioned in the background. This invention features a novel structure, incorporating a sliding lifting plate, a ratchet groove with wavy teeth and an arc-shaped compression groove, along with a connecting rod, a locking rod, and an elastic buckle. This allows for precise adjustment of the lumbar support height in multiple positions without needing to get up. To lower the lumbar support, simply pull it to the top to unlock and slide it. This effectively improves the problem of poor lumbar support adjustment in traditional chairs, adapting to users of different heights and sitting habits, providing precise and supportive lumbar support, and alleviating lumbar fatigue, insufficient support, or discomfort caused by prolonged sitting.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an ergonomic office chair with an adjustable lumbar support, comprising a seat base, a seat back installed on one side of the seat base, a mounting shell fixedly connected to one side of the seat back, two storage sleeves fixedly connected to the lower side of the inner wall of the mounting shell, a lifting plate slidably fitted on the inner wall of the storage sleeve, ratchet grooves on both sides of the storage sleeve, arc-shaped compression grooves respectively formed at the upper and lower ends of the ratchet groove, a rectangular groove on one side of the lifting plate, a movable connecting rod rotatably fitted on one side of the inner wall of the rectangular groove via a torsion spring, a locking rod rotatably fitted at the movable end of the movable connecting rod, an elastic buckle fitted on one side of the inner wall of the rectangular groove cooperating with the movable connecting rod, a limit locking groove formed on the side of the movable connecting rod near the elastic buckle, a connecting bracket fixedly connected to the upper end of each of the two lifting plates, and a lumbar support plate fixedly connected to one end of each of the two connecting brackets.

[0006] Furthermore, the upper end of the lifting plate is slidably fitted on the upper side of the mounting shell, and one end of the elastic buckle is engaged with the inner wall of the limiting slot.

[0007] Furthermore, the lever is slidably fitted on the inner wall of the ratchet groove and the arc-shaped extrusion groove.

[0008] Furthermore, a headrest is installed on one side of the seat back, and the headrest is located above the lumbar support plate.

[0009] Furthermore, armrest supports are fixedly connected to both sides of the seat base, and armrests are installed on the upper side of both armrest supports.

[0010] Furthermore, a seat cushion is installed on the upper side of the seat base.

[0011] Furthermore, the ratchet groove and the arc-shaped compression groove together form an adjustment channel for the sliding of the locking rod, and one side of the inner wall of the adjustment channel is provided with a wave-shaped tooth structure adapted to the locking rod.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model achieves precise multi-level adjustment of the lumbar support height by setting a sliding lifting plate, a ratchet groove with a wave-shaped tooth and an arc-shaped compression groove, as well as a matching movable linkage, locking rod and elastic buckle. It can be operated without getting up. When adjusting, simply pull it to the top to unlock and slide. It effectively improves the problem of poor convenience of traditional seat lumbar support adjustment. It can adapt to users of different heights and sitting habits, so that the waist can get precise and close support, and improve the fatigue, insufficient support or discomfort of the waist when sitting for a long time.

[0014] 2. This utility model, by setting up a synergistic structure of headrest, armrest support, armrest support and seat cushion, forms a whole-body support system with lumbar support, which improves the problem that traditional chairs only rely on the curvature of the backrest for support and lack full-body adaptation. The headrest relieves neck pressure, the armrest and support reduce shoulder and arm burden, and the seat cushion improves hip comfort, comprehensively improving the body fatigue after sitting for a long time and meeting the health and comfort needs in the office scene. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an ergonomic office chair with an adjustable lumbar support according to the present invention.

[0016] Figure 2 This is a side view of the ergonomic office chair with an adjustable lumbar support according to the present invention.

[0017] Figure 3 This is a schematic diagram of the lumbar support plate installation structure of an adjustable lumbar pillow ergonomic office chair according to the present invention.

[0018] Figure 4 This is a schematic cross-sectional view of the mounting shell structure of an ergonomic office chair with an adjustable lumbar support according to the present invention.

[0019] Figure 5 This is a schematic diagram of the lifting plate connection structure of an adjustable lumbar support ergonomic office chair according to the present invention.

[0020] Figure 6 This is a schematic diagram of the limiting chuck installation structure of an ergonomic office chair with an adjustable lumbar support according to the present invention.

[0021] In the diagram: 1. Seat base; 2. Seat backrest; 3. Mounting shell; 4. Storage sleeve; 5. Lifting plate; 6. Ratchet groove; 7. Arc-shaped extrusion groove; 8. Rectangular groove; 9. Movable linkage; 10. Locking rod; 11. Elastic buckle; 12. Limiting slot; 13. Connecting bracket; 14. Lumbar support plate; 15. Headrest; 16. Armrest support frame; 17. Armrest plate; 18. Seat cushion. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please refer to Figures 1 to 6This utility model provides a technical solution: an ergonomic office chair with an adjustable lumbar support, including a seat base 1, a seat back 2 installed on one side of the seat base 1, a mounting shell 3 fixedly connected to one side of the seat back 2, two storage sleeves 4 fixedly connected to the lower side of the inner wall of the mounting shell 3, a lifting plate 5 slidably fitted on the inner wall of the storage sleeve 4, ratchet grooves 6 opened on both sides of the storage sleeve 4, arc-shaped extrusion grooves 7 opened at the upper and lower ends of the ratchet grooves 6 respectively, a rectangular groove 8 opened on one side of the lifting plate 5, a movable connecting rod 9 rotatably fitted on one side of the inner wall of the rectangular groove 8 through a torsion spring, a locking rod 10 rotatably fitted at the movable end of the movable connecting rod 9, an elastic buckle 11 fitted on one side of the inner wall of the rectangular groove 8 that cooperates with the movable connecting rod 9, a limit locking groove 12 opened on the side of the movable connecting rod 9 near the elastic buckle 11, a connecting bracket 13 fixedly connected to the upper end of each of the two lifting plates 5, and a lumbar support plate 14 fixedly connected to one end of the two connecting brackets 13. When the height of the lumbar support plate 14 needs to be adjusted, if it needs to be adjusted upwards, simply push the lumbar support plate 14 to drive the connecting bracket 13 and the lifting plate 5 to slide along the inner wall of the storage sleeve 4. The locking rod 10, under the limitation of the wave-shaped tooth structure in the ratchet groove 6, achieves unidirectional upward movement and is fixed at the target position. If it needs to be adjusted downwards, first pull the lumbar support plate 14 upwards to the top. At this time, the locking rod 10 at one end of the movable connecting rod 9 rotates under the pressure of the inner wall of the arc-shaped extrusion groove 7, causing the elastic buckle 11 to engage with the limiting groove 12, releasing the connection between the locking rod 10 and the ratchet groove 6. Then release the lumbar support plate 14, and the locking rod 10 can slide downwards along the adjustment channel. This structure achieves precise adjustment of the lumbar support plate 14 in multiple positions by switching the locking rod 10 between the ratchet groove 6 and the arc-shaped extrusion groove 7, adapting to different users' waist positions and improving the support fit.

[0024] In this embodiment, the upper end of the lifting plate 5 is slidably fitted onto the upper side of the mounting shell 3, and one end of the elastic buckle 11 is engaged with the inner wall of the limiting slot 12. The locking rod 10 is slidably fitted onto the inner walls of the ratchet groove 6 and the arc-shaped compression groove 7. A headrest 15 is installed on one side of the seat back 2, and the headrest 15 is located above the lumbar support plate 14. Armrest supports 16 are fixedly connected to both sides of the seat base 1, and armrest plates 17 are installed on the upper side of both armrest supports 16. A seat cushion 18 is installed on the upper side of the seat base 1. The ratchet groove 6 and the arc-shaped compression groove 7 together form an adjustment channel for the locking rod 10 to slide, and one side of the inner wall of the adjustment channel is provided with a wave-shaped toothed structure adapted to the locking rod 10. The upper end of the lifting plate 5 slides on the upper side of the mounting shell 3, providing a stable guide for the adjustment of the lumbar support plate 14 and preventing deviation during the adjustment process. The headrest 15 is located above the lumbar support plate 14 and works with the lumbar support plate 14 to form full spinal support from the neck to the waist, effectively relieving neck pressure. The armrest supports 16 on both sides of the seat base 1 support the armrest plate 17, which can reduce the burden on the shoulders and arms. The seat cushion 18 improves the comfort of sitting for a long time. At the same time, the wave-shaped toothed structure of the adjustment channel can make the lever 10 stably positioned in each position, preventing the lumbar support plate 14 from shaking accidentally during use. The whole system, through the cooperation of multiple components, achieves flexible adjustment of the lumbar support while ensuring the comfort of the whole body at work.

[0025] When using the device, the core adjustment of this adjustable lumbar support ergonomic office chair lies in the cooperation between the locking rod 10 and the ratchet groove 6 and the arc-shaped compression groove 7, as well as the limiting function of the elastic buckle 11. When adjusting the height of the lumbar support plate 14, the upward adjustment can be achieved by directly pushing the lumbar support plate 14, causing the connecting bracket 13 and the lifting plate 5 to slide along the storage sleeve 4. The locking rod 10 moves unidirectionally along the wave-shaped teeth in the ratchet groove 6 and is fixed. When adjusting downward, the lumbar support plate 14 must first be pulled to the top. The locking rod 10 is squeezed by the arc-shaped compression groove 7, causing the movable connecting rod 9 to rotate, and the elastic buckle 11... 11 engages with the limiting slot 12 to release the connection between the lever 10 and the ratchet groove 6. When the lever 10 slides down to the target position, it is squeezed by the lower arc-shaped compression groove 7 and rotates again to separate the elastic buckle 11 from the limiting slot 12. The lever 10 resets under the action of the torsion spring and re-engages with the ratchet groove 6 for fixation. The mounting shell 3 and the lifting plate 5 ensure the stability of adjustment. The headrest 15, armrest support 16, armrest support plate 17 and seat cushion 18 work together to provide full-body support, ultimately achieving the effect of adapting to different body types and relieving fatigue from prolonged sitting.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An ergonomic office chair with an adjustable lumbar support, comprising a seat base (1), characterized in that: A seat back (2) is installed on one side of the seat base (1). A mounting shell (3) is fixedly connected to one side of the seat back (2). Two storage sleeves (4) are fixedly connected to the lower side of the inner wall of the mounting shell (3). A lifting plate (5) is slidably fitted on the inner wall of the storage sleeve (4). Ratchet grooves (6) are provided on both sides of the storage sleeve (4). Arc-shaped extrusion grooves (7) are provided at the upper and lower ends of the ratchet grooves (6). A rectangular groove (8) is provided on one side of the lifting plate (5). One side of the inner wall is fitted with a movable connecting rod (9) via a torsion spring. The movable end of the movable connecting rod (9) is fitted with a locking rod (10). One side of the inner wall of the rectangular groove (8) is fitted with an elastic buckle (11) that cooperates with the movable connecting rod (9). A limit slot (12) is opened on the side of the movable connecting rod (9) near the elastic buckle (11). The upper ends of the two lifting plates (5) are fixedly connected with connecting brackets (13). One end of the two connecting brackets (13) is fixedly connected with a waist support plate (14).

2. The ergonomic office chair with an adjustable lumbar support according to claim 1, characterized in that: The upper end of the lifting plate (5) is slidably fitted on the upper side of the mounting shell (3), and one end of the elastic buckle (11) is engaged with the inner wall of the limiting slot (12).

3. The ergonomic office chair with an adjustable lumbar support according to claim 1, characterized in that: The lever (10) slides on the inner wall of the ratchet groove (6) and the arc-shaped extrusion groove (7).

4. The ergonomic office chair with an adjustable lumbar support according to claim 1, characterized in that: A headrest (15) is installed on one side of the seat back (2), and the headrest (15) is located above the lumbar support plate (14).

5. An ergonomic office chair with an adjustable lumbar support according to claim 1, characterized in that: Both sides of the seat base (1) are fixedly connected to armrest supports (16), and armrest plates (17) are installed on the upper side of both armrest supports (16).

6. The ergonomic office chair with an adjustable lumbar support according to claim 1, characterized in that: A seat cushion (18) is installed on the upper side of the seat base (1).

7. An ergonomic office chair with an adjustable lumbar support according to claim 1, characterized in that: The ratchet groove (6) and the arc-shaped extrusion groove (7) together form an adjustment channel for the sliding of the locking rod (10), and one side of the inner wall of the adjustment channel is provided with a wave-shaped tooth structure that is adapted to the locking rod (10).

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