Foldable soft-back swivel office chair

Abstract

The utility model relates to the technical field of furniture manufacturing, and mainly relates to a foldable soft-back swivel office chair, which comprises an office chair and a waist support, the office chair comprises a chair back, a chair seat and supporting legs, the chair back is located on one side of the chair seat, the chair back is fixedly connected with the chair seat through a connecting seat, the chair back is hinged to the connecting seat, and the chair back is arranged in a manner of overturning towards the other side of the chair seat around a hinged rotating shaft. The supporting legs are arranged at the bottom of the chair seat, and the waist support is detachably connected to the chair back.

Description

Technical Field

[0001] This utility model relates to the field of furniture manufacturing technology, and mainly to a foldable soft-back swivel office chair. Background Technology

[0002] Traditional offices are dominated by fixed workstations. However, with the popularization of remote work and shared office spaces, users have put forward higher requirements for the convenience and storage of office furniture. Traditional fixed office chairs are difficult to meet the needs of frequent movement and quick space adjustment, which has spurred the exploration of foldable office furniture technology and promoted the development of office furniture towards storage, so that it can reduce the volume occupied by the furniture when not in use.

[0003] Therefore, utility model patent application number CN201721059842.X discloses a simple folding office chair, including a backrest, armrests, and a seat; a chassis is provided at the bottom of the chair body; casters are provided at the lower end of the chassis; a gas spring is fixedly provided at the upper end of the chassis; the seat is bolted to the upper end of the gas spring, and an adjustment handle is provided at the connection between the seat and the gas spring; a backrest fixing frame is fixedly installed at the rear end of the seat, and the backrest is movably connected to the two end side walls of the backrest fixing frame via a third rotating shaft; a fourth rotating shaft is provided at the middle position of the two end side walls of the backrest, and the armrests are movably connected to the two end side walls of the backrest via the fourth rotating shaft; the other end of the armrest is movably connected to an armrest support frame via a second rotating shaft, and the armrest support frame is movably connected to the lower end of the two end side walls of the seat via a first rotating shaft. The L-shaped corner design of the armrests of this simple folding office chair is beneficial for use when the backrest is folded, and this structure has a strong support structure, effectively improving its service life.

[0004] However, the applicant found that the above technology still has shortcomings: 1. Lack of functionality. Foldable office chairs lack good support, and the problem of back pain caused by long hours of office work is easily caused by the lack of cushioning support in foldable swivel chairs, which can easily lead to muscle fatigue.

[0005] Therefore, there is an urgent need for a foldable soft-back swivel office chair that is comfortable, stable, provides good support, and is durable. Utility Model Content

[0006] To address the above issues, a foldable soft-back swivel office chair with good stability and durability has been developed. The hinged rotating backrest and detachable lumbar support increase the flexibility of the office chair. The curved backrest provides more precise support for the back. When the user leans back, the backrest will tilt accordingly, perfectly conforming to the curve of the human back with the lumbar support, reducing pressure on the waist and back.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A foldable soft-back swivel office chair, comprising:

[0009] Office chair and lumbar support;

[0010] The office chair includes a backrest, a seat, and support legs. The backrest is located on one side of the seat and is fixedly connected to the seat via a connecting seat. The backrest is hinged to the connecting seat and is rotated around the hinge axis to the other side of the seat. The support legs are located at the bottom of the seat, and the lumbar support is detachably connected to the backrest.

[0011] As an improvement, the chair back is arc-shaped and has several through-holes evenly distributed along the vertical direction of the chair back. A slot block is also fixedly connected to the chair back, and a square slot is provided on one side of the slot block.

[0012] As an improvement, a sleeve is provided behind the waist support. The sleeve is adapted to the contour of the slot block and is fitted onto the slot block. A protrusion is provided on one bottom side of the sleeve, and the protrusion is engaged with the square hole slot.

[0013] As an improvement, the top side of the sleeve is provided with a guide groove, and a sliding block that slides horizontally is provided in the guide groove. The sliding block is controlled and adjusted by a button switch, and the waist support is hinged to one end of the sliding block.

[0014] As an improvement, the chair seat includes a base plate and a mounting base. The base plate is fixedly installed on the bottom of the chair seat, and the mounting base is fixedly installed on the bottom of the base plate by bolts. A circular groove is provided at the center of the mounting base.

[0015] As an improvement, the bottom of the base plate is symmetrically equipped with card seats on both sides, and the sides of the card seats are fixedly connected with side brackets, and handrails are fitted on the side brackets.

[0016] As an improvement, the bottom of the mounting base is also provided with a pneumatic rod, one end of which is provided with a piston rod, which is inserted into the circular groove.

[0017] As an improvement, the top of the chair seat is also equipped with a cushion, which includes a memory foam layer, a protective wrapping layer and a support layer. The memory foam layer fills the support layer, and the protective wrapping layer covers the outside of the support layer.

[0018] As an improvement, the support foot includes a foot and casters. The foot is arranged in a five-pointed star shape. A circular hole is provided through the center of the foot. The circular hole is opposite to the circular groove. The other end of the gas rod is inserted into the circular hole. Five sets of casters are provided, and the five sets of casters are respectively installed at the five corners of the foot.

[0019] The beneficial effects of this utility model are as follows:

[0020] (1) The present invention is designed with an arc-shaped backrest and a lumbar support. The human spine has a natural physiological curve and is S-shaped when viewed from the side. The arc-shaped backrest can fit the curve of the human back well, especially the curve of the waist, providing uniform support for the entire back. Secondly, the lumbar support further provides precise support for the waist, filling the gap between the waist and the backrest, allowing the waist muscles to relax and reducing the pressure on the waist.

[0021] (2) The curved backrest of the chair is hinged in this utility model. When the office chair is not in use, the backrest can be folded up to reduce the space occupied by the chair. This is especially important for offices, meeting rooms or home office environments with limited space. It is convenient to store and organize, and makes the space cleaner and more open.

[0022] (3) In this utility model, the lumbar support that can be adjusted back and forth and rotated up and down can be used to suit different body types and sitting postures. Different physiological curvatures of the lumbar spine are different. The back and forth adjustment allows the lumbar support to adjust its position according to the thickness of the waist and the depth of the buttocks, ensuring that the lumbar support is accurately placed on the position where the lumbar spine needs the most support. At the same time, the rotation adjustment allows the lumbar support to change its angle with the body posture and always fit the waist curve.

[0023] (4) The detachable lumbar support in this utility model makes cleaning and maintenance more convenient, and makes it easier to replace parts and store. After the office chair has been used for a period of time, the lumbar support may get dirty or dusty due to contact with the human body. The detachable design makes cleaning simple and easy. Just remove the lumbar support and clean it according to the appropriate cleaning method to keep the office chair clean and extend its life. When the lumbar support is damaged or aged, the detachable design makes it easy to replace the lumbar support separately without replacing the entire office chair. This can save costs and improve resource utilization. However, when the office chair needs to be stored or moved, the detachable lumbar support can reduce the overall volume, making it easier to store the office chair in a limited space and also making it easier to move and reduce the risk of damage to the chair during transportation.

[0024] (5) In this utility model, the height of the seat is adjusted by designing a gas spring, so that the user can adjust the seat to a suitable height according to his own height, the height of the desk and his personal habits, so that his feet can be placed flat on the ground, his thighs are parallel to the ground, and his arms can be placed naturally on the desk, thereby reducing the pressure on various parts of the body and avoiding muscle fatigue and bone damage caused by long-term uncomfortable sitting posture.

[0025] (6) The casters designed in this utility model can slide easily on the office floor. Users can move directly to different work areas without getting up. When handling multiple work tasks, the chair can be moved quickly to switch between different work equipment or documents, avoiding the time and energy wasted by frequently getting up and moving around, which helps to maintain the continuity and focus of work.

[0026] In summary, the foldable soft-back swivel office chair of this utility model is more flexible and convenient, effectively enhances comfort, and is easy to store and saves space. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0028] Figure 2 This is a front view structural diagram of the chair back of this utility model;

[0029] Figure 3 This is a schematic diagram of the chair back structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the chair back and lumbar support structure of this utility model;

[0031] Figure 5 This is an enlarged structural diagram of part B in the chair back and lumbar support of this utility model;

[0032] Figure 6 This is a schematic diagram of the lumbar support back structure of this utility model. Figure 1 ;

[0033] Figure 7 This is a schematic diagram of the lumbar support back structure of this utility model. Figure 2 ;

[0034] Figure 8 This is a schematic diagram of the lumbar support structure of this utility model;

[0035] Figure 9 This is a schematic diagram of the internal structure of the push button switch of this utility model;

[0036] Figure 10 This is a schematic diagram of the connecting block structure of this utility model;

[0037] Figure 11This is a schematic diagram of the slide block structure of this utility model;

[0038] Figure 12 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0039] Figure 13 This is a schematic diagram of the mounting base structure of this utility model;

[0040] Figure 14 This is a schematic diagram of the structure of the pneumatic rod of this utility model;

[0041] Figure 15 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0042] Figure 16 This is a schematic diagram of the support foot structure of this utility model.

[0043] In the diagram: 1. Office chair, 11. Backrest, 111. Strip hole, 112. Slot block, 113. Square slot, 114. Insertion hole, 12. Seat, 121. Base plate, 1210. Slot, 1211. Side bracket, 1212. Armrest, 122. Mounting base, 123. Circular slot, 124. Adjustment rod, 13. Support leg, 131. Support leg, 132. Caster, 133. Circular hole, 14. Connecting seat, 15. Rotating shaft, 2. Lumbar support, 21. Sleeve, 211. Protrusion, 22. 221. Guide groove, 2222. Slide block, 2210. Strip slide, 2211. Toothed block, 222. Push button switch, 2220. Button head, 2221. Connecting block, 2222. Threaded rod, 2223. Spring, 2225. Threaded hole, 2226. Toothed groove, 23. Telescopic rod, 231. Inner tube, 232. Outer tube, 233. Adjusting threaded pin, 234. Recessed buckle, 3. Gas rod, 31. Piston rod, 4. Seat cushion, 41. Memory foam layer, 42. Protective wrapping layer, 43. Support layer. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] Example 1:

[0048] like Figures 1 to 16 As shown, a foldable soft-back swivel office chair includes:

[0049] Office chair 1 and lumbar support 2;

[0050] The office chair 1 includes a backrest 11, a seat 12, and support legs 13. The backrest 11 is located on one side of the seat 12 and is fixedly connected to the seat 12 via a connecting seat 14. The backrest 11 is hinged to the connecting seat 14 and is rotated around the hinged rotation axis 15 to the other side of the seat 12. The support legs 13 are located at the bottom of the seat 12, and the lumbar support 2 is detachably connected to the backrest 11.

[0051] The chair back 11 is arc-shaped and has several through-holes 111. The through-holes 111 are evenly distributed along the vertical direction of the chair back 11. A slot block 112 is also fixedly connected to the chair back 11. A square slot 113 is provided on one side of the slot block 112.

[0052] It should be noted that the backrest 11 adopts an arc-shaped design, which conforms to ergonomics and can effectively fit the curve of the human back, providing comfortable support for the user and further improving safety and comfort during use. The through-hole 111 increases breathability while ensuring the strength of the backrest, preventing the back from feeling stuffy due to prolonged contact with the backrest.

[0053] Secondly, it should be explained that the principle of folding the chair back 11 is as follows: The chair back 11 and the connecting seat 14 are hinged by a rotating shaft 15. When the office chair needs to be folded, the user needs to lift the chair back 11 upwards to overcome the damping force at the rotating shaft 15, so that the chair back 11 can be flipped around the rotating shaft 15 to the other side of the seat 12. The folded office chair is smaller in size, making it easier to store and move. It is especially suitable for office spaces with limited space or scenarios where office equipment needs to be moved frequently.

[0054] The back of the waist support 2 is provided with a sleeve 21, which is adapted to the contour of the slot block 112. The sleeve 21 is fitted onto the slot block 112. A protrusion 211 is provided on one bottom side of the sleeve 21, which is engaged with the square hole slot 113.

[0055] It should be noted that a telescopic rod 23 is also hinged to the back of the lumbar support 2. The telescopic rod 23 includes an inner tube 231 and an outer tube 232. The outer tube 232 is sleeved on the inner tube 231. An adjusting screw 233 is inserted into one side wall of the outer tube 232. The end of the adjusting screw 233 abuts against the outer wall of the inner tube 231. When it is necessary to adjust the length of the telescopic rod 23, the adjusting screw 233 is loosened to allow the inner tube 231 to slide freely. The outer tube 232 is installed inside. After being adjusted to a suitable position, the adjusting screw 233 is tightened to make it securely abut against the outer wall of the inner tube 231 for locking. Then, the end of the telescopic rod 23 is inserted into the insertion hole 114 to provide support for the lumbar support 2. When the lumbar support 2 is disassembled, the end of the telescopic rod 23 is pulled out from the insertion hole 114 and then hooked into the recess 234 for storage by self-hanging force.

[0056] The top side of the sleeve 21 is provided with a guide groove 22, and a sliding block 221 that slides horizontally is provided in the guide groove 22. The sliding block 221 is controlled and adjusted by a button switch 222, and the waist support 2 is hinged to one end of the sliding block 221.

[0057] The top center of the slide block 221 is provided with a strip-shaped slide groove 2210 extending to both sides, and the bottom opening of the slide block 221 is provided with a toothed block 2211.

[0058] It should be noted that the specific structure and working principle of the push-button switch 222 are as follows;

[0059] The specific structure of the push button switch 222 is as follows: The push button switch 222 includes a button head 2220 and a connecting block 2221. The bottom of the button head 2220 is provided with a threaded rod 2222. The top center of the connecting block 2221 is provided with a threaded hole 2225, which is connected to the threaded rod 2222. Three sets of springs 2223 are fixedly connected to the bottom of the connecting block 2221. The three sets of springs 2223 are pressed between the connecting block 2221 and the guide groove 22. The top groove of the connecting block 2221 is provided with a toothed groove 2226, which is engaged with the toothed block 2211.

[0060] The working principle of the lumbar support 2 adjusted by the button switch 222 is as follows: When the user presses the button head 2220, the threaded rod 2222 drives the connecting block 2221 to press down. As the threaded rod 2222 moves down, the toothed groove 2226 disengages from the toothed block 2211. At this time, the sliding block 221 is unrestrained and can slide freely in the guide groove 22 in the horizontal direction. The user can adjust the lumbar support 2 to a suitable position according to their own needs. After the adjustment is completed, the button head 2220 is released. Under the action of the spring 2223, the connecting block 2221 returns to its original position. The toothed groove 2226 re-engages with the toothed block 2211 and locks the sliding block 221 in the current position, thereby locking the position of the lumbar support 2. At the same time, the lumbar support 2 can also swing around the hinge point at a certain angle to adapt to the waist posture and needs of different users.

[0061] Secondly, it should be noted that the lumbar support 2 is made of high-elasticity memory foam, which can automatically mold to the shape of the user's waist, accurately support the waist, and effectively reduce waist pressure. The card sleeve 21 on the back is made of wear-resistant polycarbonate material, which fits firmly with the card slot block 112, ensuring that the lumbar support 2 will not easily loosen during use.

[0062] The chair seat 12 includes a base plate 121 and a mounting base 122. The base plate 121 is fixedly installed on the bottom of the chair seat 12, and the mounting base 122 is fixedly installed on the bottom of the base plate 121 by bolts. A circular groove 123 is provided at the center of the mounting base 122.

[0063] The bottom of the base plate 121 is symmetrically equipped with card seats 1210 on both sides. The side of the card seat 1210 is fixedly connected with a side bracket 1211, and a handrail 1212 is sleeved on the side bracket 1211.

[0064] The bottom of the mounting base 122 is also provided with a pneumatic rod 3, one end of which is provided with a piston rod 31, which is inserted into the circular groove 123.

[0065] The mounting base 122 is also provided with an adjustment rod 124. The adjustment rod 124 works with the gas spring 3 to adjust the height of the seat to accommodate the height of different users and the needs of different work occasions. By pulling the adjustment rod 124, the seat can be raised or lowered under the action of the gas spring 3.

[0066] It should be noted that the lifting principle of the chair seat 12 is as follows: the gas spring 3 at the bottom of the mounting base 122 is the core component for realizing the lifting function of the chair seat. When the user sits on the office chair, the gas pressure in the gas spring 3 changes when the user pulls the adjusting rod 124, which pushes the piston rod 31 to move up and down in the circular groove 123 of the mounting base 122, thereby driving the chair seat 12 to rise or fall. After adjusting to a height suitable for the user's height or the needs of the work environment, the adjusting rod 124 is released to fix the height.

[0067] The top of the seat 12 is also equipped with a cushion 4, which includes a memory foam layer 41, a protective wrapping layer 42 and a support layer 43. The memory foam layer 41 is filled in the support layer 43, and the support layer 43 is covered by the protective wrapping layer 42.

[0068] It should be noted that the memory foam layer 41 is made of high-quality slow-rebound memory foam, which can perfectly conform to the curve of the buttocks and distribute pressure. The protective wrapping layer 42 is made of stain-resistant and wear-resistant fabric, and the support layer 43 is made of high-density sponge, which provides good support and extends the service life of the cushion.

[0069] The support leg 13 includes a support leg 131 and casters 132. The support leg 131 is arranged in a five-pointed star shape. A circular hole 133 is provided through the center of the support leg 131. The circular hole 133 is arranged opposite to the circular groove 123. The other end of the gas rod 3 is inserted into the circular hole 133. Five sets of casters 132 are provided, and the five sets of casters 132 are respectively installed at the five corners of the support leg 131.

[0070] It should be noted that the support leg 131 is made of high-strength die-cast aluminum alloy. The five-pointed star-shaped structure has good stability and load-bearing capacity, and can withstand a large weight without deformation. It evenly distributes the weight of the chair body and enhances the overall stability. The caster 132 adopts a double-wheel universal design, which can achieve 360-degree free rotation. At the same time, the wheel surface of the caster 132 is made of silent rubber material, which effectively reduces the noise generated during movement while ensuring smooth movement, making it suitable for various office environments.

[0071] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable soft-back swivel office chair, characterized in that, include: Office chair (1) and lumbar support (2); The office chair (1) includes a backrest (11), a seat (12) and a support leg (13). The backrest (11) is located on one side of the seat (12). The backrest (11) is fixedly connected to the seat (12) through a connecting seat (14). The backrest (11) is hinged to the connecting seat (14). The backrest (11) is flipped around the hinged rotation axis (15) to the other side of the seat (12). The support leg (13) is located at the bottom of the seat (12). The lumbar support (2) is detachably connected to the backrest (11). The chair back (11) is arc-shaped and has several through-holes (111) evenly distributed along the vertical direction of the chair back (11). A slot block (112) is also fixedly connected to the chair back (11), and a square slot (113) is provided on one side of the slot block (112). The back of the waist support (2) is provided with a sleeve (21), which is adapted to the contour of the slot block (112). The sleeve (21) is fitted onto the slot block (112). A protrusion (211) is provided on the bottom side of the sleeve (21), which is engaged with the square hole slot (113). The top side of the sleeve (21) is provided with a guide groove (22), and a sliding block (221) that slides horizontally is provided in the guide groove (22). The sliding block (221) is controlled and adjusted by a button switch (222), and the waist support (2) is hinged to one end of the sliding block (221).

2. The foldable soft-back swivel office chair according to claim 1, characterized in that: The chair seat (12) includes a base plate (121) and a mounting seat (122). The base plate (121) is fixedly installed on the bottom of the chair seat (12), and the mounting seat (122) is fixedly installed on the bottom of the base plate (121) by bolts. A circular groove (123) is provided at the center of the mounting seat (122).

3. A foldable soft-back swivel office chair according to claim 2, characterized in that: The bottom of the base plate (121) is symmetrically equipped with card seats (1210) on both sides. The side of the card seat (1210) is fixedly connected with a side bracket (1211), and a handrail (1212) is sleeved on the side bracket (1211).

4. A foldable soft-back swivel office chair according to claim 2, characterized in that: The bottom of the mounting base (122) is also provided with a pneumatic rod (3), one end of which is provided with a piston rod (31), which is inserted into the circular groove (123).

5. A foldable soft-back swivel office chair according to claim 1, characterized in that: The top of the seat (12) is also equipped with a cushion (4), which includes a memory foam layer (41), a protective wrapping layer (42) and a support layer (43). The memory foam layer (41) is filled in the support layer (43), and the support layer (43) is covered by the protective wrapping layer (42).

6. A foldable soft-back swivel office chair according to claim 4, characterized in that: The support leg (13) includes a support leg (131) and casters (132). The support leg (131) is arranged in a five-pointed star shape. A circular hole (133) is provided through the center of the support leg (131). The circular hole (133) is arranged opposite to the circular groove (123). The other end of the gas rod (3) is installed in the circular hole (133). There are five sets of casters (132), which are respectively installed at the five corners of the support leg (131).

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