Chair

Abstract

The present invention relates to the technical field of furniture, and specifically discloses a chair, comprising a seat cushion assembly and a backrest assembly. The seat cushion assembly comprises a seat cushion frame, the seat cushion frame comprising a first part and a second part, the first part and the second part being connected, and in a support direction, the first part being located above the second part; the first part and the second part are at least partially separated, and when force is applied to the first part, the first part can elastically move relative to the second part. By means of the seat cushion frame supporting a user, when force is applied to the first part of the seat cushion frame, since the first part can elastically move relative to the second part, when the user adjusts a sitting posture in real time, as the position and magnitude of an acting force applied to the first part by the hips of the user change, the first part can adaptively adjust in real time, under the action of the elastic force, the supporting effect acting against the hips of the user, thereby improving use comfort of the user.

Description

A type of seat Technical Field

[0001] This invention relates to the field of furniture and household products technology, and in particular to a chair. Background Technology

[0002] With social development and the continuous improvement of people's living standards, health has become an increasingly important topic of concern. People often need to sit for extended periods while working or studying. Existing office chairs, gaming chairs, or home chairs typically include a seat cushion and a backrest. The seat cushion supports the buttocks, and the backrest supports the back. However, existing seat cushions cannot adjust their position to conform to the user's buttocks as their posture changes, thus failing to provide adequate support. This results in the buttocks often being unsupported after adjusting posture, leading to discomfort, fatigue, and negatively impacting health. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a seat that allows users to feel comfortable in a sitting position.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solutions:

[0005] The present invention provides a seat, including a seat cushion assembly and a backrest assembly. The seat cushion assembly includes a seat cushion frame, which includes a first part and a second part. The first part and the second part are connected, and in the support direction, the first part is located above the second part. The first part and the second part are at least partially separated, and when the first part is subjected to force, the first part can elastically move relative to the second part.

[0006] The present invention discloses a seat that supports the user through a seat cushion frame. The first part is located on one side of the user and directly supports the buttocks and legs. When the first part of the seat cushion frame is subjected to force, since the first part can move elastically relative to the second part, as the user adjusts their sitting posture in real time, the first part can adaptively adjust the support effect on the user's buttocks under the action of elastic force as the position and magnitude of the force exerted on the first part by the user's buttocks changes, thereby improving the user's comfort.

[0007] Furthermore, the first part and the second part are partially connected and partially separated, so that the first part is suspended relative to the second part at the point where the first part and the second part are separated; the seat frame is made of metal or plastic.

[0008] Furthermore, the location where the first part and the second part are separated forms an installation area, and an elastic support structure is provided in the installation area.

[0009] Furthermore, the elastic support structure includes two elastic support rings and an elastic connecting part. The two elastic support rings are located at both ends of the elastic connecting part and are respectively connected to the corresponding ends of the elastic connecting part. When the elastic support structure is installed in the installation area, the two elastic support rings and the elastic connecting part are clamped between the first part and the second part.

[0010] Alternatively, the elastic support structure may include multiple springs or multiple spring sheets, which are spaced apart in the mounting area and clamped between the first part and the second part.

[0011] Furthermore, a first mounting groove is provided in the first part, and a second mounting groove is provided in the second part. A first protrusion and a second protrusion are provided on the two elastic support rings and / or elastic connecting parts. The first protrusion is inserted into the first mounting groove, and the second protrusion is inserted into the second mounting groove.

[0012] Furthermore, the two sides of the first part are inclined upwards, and a portion of the installation area is located between the inclined portion of the first part and the second part, so that a portion of the installation area is inclined.

[0013] Furthermore, the backrest assembly is connected to the base via a lifting adjustment assembly, which causes the backrest assembly to rise or fall relative to the seat cushion assembly.

[0014] Furthermore, the backrest assembly includes a back support assembly and a lumbar support assembly, the back support assembly and the lumbar support assembly being connected by a first connector; the first connector includes a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, the first connecting end and the second connecting end being respectively disposed on both sides of the lumbar support assembly and connected thereto, the third connecting end and the fourth connecting end being respectively disposed on both sides of the back support assembly and connected thereto.

[0015] Furthermore, the connection points of the first and second connecting ends with the lumbar support assembly are located on the horizontal center line of the lumbar support assembly;

[0016] Alternatively, the connection points of the third and fourth connecting ends with the back support assembly are located on the horizontal center line of the back support assembly.

[0017] Furthermore, the backrest assembly includes a back support assembly and a lumbar support assembly, which are connected by a first connector; the seat also includes a second connector, and the lifting adjustment assembly is disposed between the first connector and the second connector. The second connector is also connected to the base, and the lifting adjustment assembly causes the first connector to drive the back support assembly and the lumbar support assembly to rise and fall synchronously.

[0018] Furthermore, a first micro-adjustment component is provided between the first connecting end of the first connector and the lumbar support assembly and / or between the second connecting end of the first connector and the lumbar support assembly; the first micro-adjustment component includes a gear switch, a movable component that can move elastically in cooperation with the gear switch, and a first fixing component. The gear switch and the movable component are disposed on the first connector or the lumbar support assembly. The first connector and the lumbar support assembly are connected by the first fixing component. The gear switch is adjusted to unlock or lock the movable component, and the lumbar support assembly is squeezed or loosened to drive the movable component to reciprocate in the horizontal direction.

[0019] Furthermore, a mounting cylinder is provided on the first connector, the gear switch is connected to the mounting cylinder, at least part of the moving member is located inside the mounting cylinder, a first mounting groove is provided on the waist support assembly, a first soft rubber is provided in the first mounting groove, a portion of the moving member passes through the first soft rubber and is connected to the portion of the first fixing assembly that passes through the first mounting groove, and a spring sleeved on the gear switch is provided inside the mounting cylinder, one end of the spring abuts against the end of the mounting cylinder, and the other end abuts against the end of the moving member;

[0020] Alternatively, a mounting cylinder is provided on the waist support assembly, the gear switch is connected to the mounting cylinder, and at least part of the moving part is located inside the mounting cylinder. A first mounting groove is provided on the first connecting member, and a first soft rubber is provided in the first mounting groove. Part of the moving part passes through the first soft rubber and is connected to the part of the first fixing assembly that passes through the first mounting groove. A spring is provided inside the mounting cylinder and sleeved on the gear switch. One end of the spring abuts against the end of the mounting cylinder, and the other end abuts against the end of the moving part.

[0021] Furthermore, a second micro-adjustment component is provided between the third connecting end of the first connector and the back support assembly and / or between the fourth connecting end of the first connector and the back support assembly.

[0022] The second micro-adjustment component includes a second soft rubber and a second fixing component. The second soft rubber is disposed between the first connector and the back support component. A portion of the first connector passes through the second soft rubber and is connected to the portion of the second fixing component that passes through the back support component. The second fixing component connects the first connector and the back support component and clamps the second soft rubber between the first connector and the back support component. Alternatively, the second micro-adjustment component includes a second soft rubber and a second fixing component. The second soft rubber is disposed between the first connector and the back support component. A portion of the back support component passes through the second soft rubber and is connected to the portion of the second fixing component that passes through the first connector. The second fixing component connects the first connector and the back support component and clamps the second soft rubber between the first connector and the back support component.

[0023] Furthermore, the lifting and adjusting assembly includes a fixing member, a fixing seat, an elastic member, and a stop member; the fixing member is directly or indirectly connected to the backrest assembly, the fixing seat is directly or indirectly connected to the base, the stop member is rotatably connected to the fixing seat, the fixing member is sleeved on the periphery of the fixing seat and can slide relative to it, a stop rack is provided on one inner side wall of the fixing member, and a locking tooth is provided on one side wall of the stop member, the locking tooth of the stop member meshes with the stop rack on the fixing member, the elastic member is disposed between the stop member and the fixing seat, the elastic member causes the locking tooth on the stop member to mesh with the stop rack on the fixing member, the backrest assembly can be moved to drive the fixing member to reciprocate in the length direction relative to the fixing seat by moving the backrest assembly, and the elastic member causes the stop member to position the fixing member.

[0024] Furthermore, a first limiting wall is provided inside the fixed seat and a first strip hole is provided on each of the two opposite side walls of the fixed seat. The lifting adjustment assembly also includes a first rotating shaft. The gear piece is sleeved on the first rotating shaft. The two ends of the first rotating shaft extend into the first strip hole at the corresponding ends, and the first rotating shaft can reciprocate in the first strip hole under the action of the fixing piece.

[0025] In the first state, the first rotating shaft is located at the first end below the first strip hole, the gear is disengaged from the first limiting wall, and under the action of the elastic member, the engaging teeth on the gear engage with the gear rack on the fixing member, and the waist support assembly is in an adjustable height state.

[0026] In the second state, the first rotating shaft is located at the second end above the first strip hole, the gear member is in contact with the first limiting wall to restrict the engagement of the engagement teeth on the gear member with the gear rack on the fixing member, and the waist support assembly is in a state that can be lowered to the lowest gear.

[0027] Furthermore, the seat also includes a headrest assembly located above the backrest assembly. The headrest assembly is connected to a third connector, which is rotatably connected to a second connector. The second connector is connected to a base and is also connected to a first connector. The third connector includes a fifth, a sixth, and a seventh connector. The fifth connector is rotatably connected to the second connector. The sixth and seventh connectors are located on opposite sides of the headrest assembly and connected to it. The connection points of the sixth and seventh connectors with the headrest assembly are located on the horizontal center line of the headrest assembly.

[0028] Furthermore, a third micro-adjustment component is provided between the sixth connecting end of the third connector and the headrest assembly and / or between the seventh connecting end of the third connector and the headrest assembly;

[0029] The third micro-adjustment component includes a third soft rubber and a third fixing component. The third soft rubber is disposed between the third connector and the headrest assembly. A portion of the third connector passes through the third soft rubber and is connected to the portion of the third fixing component that passes through the headrest assembly. The third fixing component connects the third connector and the headrest assembly and clamps the third soft rubber between the third connector and the headrest assembly. Alternatively, the third micro-adjustment component includes a third soft rubber and a third fixing component. The third soft rubber is disposed between the third connector and the headrest assembly. A portion of the headrest assembly passes through the third soft rubber and is connected to the portion of the third fixing component that passes through the third connector. The third fixing component connects the third connector and the headrest assembly and clamps the third soft rubber between the third connector and the headrest assembly.

[0030] Furthermore, the seat also includes a receiving component and a linkage structure. The linkage structure is connected to the backrest assembly and the receiving component respectively. The seat cushion assembly is disposed on the linkage structure, and the linkage structure can extend or retract under the action of external force to control the backrest assembly and the seat cushion assembly to move synchronously, so that the center of gravity of the seat in the reclining state moves forward relative to the center of gravity in the non-reclining state.

[0031] Furthermore, the linkage structure includes an installation component and a linkage component connected to the installation component, the seat cushion component is disposed on the installation component, and the installation component is connected to the receiving member;

[0032] When the linkage component extends, the backrest component is in a reclining state, and the mounting component drives the seat cushion component to move away from the backrest component.

[0033] When the linkage component retracts, the backrest component is in a supported state, and the mounting component drives the seat cushion to move closer to the backrest component. Attached Figure Description

[0034] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0035] Figure 1 is a structural schematic diagram of the seat of the present invention.

[0036] Figure 2 is a schematic diagram of the seat cushion assembly structure.

[0037] Figures 3 and 4 are exploded schematic diagrams of the seat cushion assembly from different directions.

[0038] Figure 5 is a schematic diagram of another embodiment of the elastic support structure.

[0039] Figure 6 is a schematic diagram of another embodiment of the elastic support structure.

[0040] Figure 7 is a schematic diagram of the backrest assembly structure.

[0041] Figures 8 and 9 are exploded diagrams of the backrest assembly from different directions.

[0042] Figure 10 is a schematic diagram of the lifting adjustment component.

[0043] Figures 11 and 12 are exploded schematic diagrams of the lifting adjustment component in different directions.

[0044] Figures 13-1 to 13-3 are cross-sectional views of the lifting adjustment assembly in various states.

[0045] Figure 14 is a schematic diagram of one embodiment of the first micro-adjustment component.

[0046] Figures 15 and 16 are exploded schematic diagrams of the first micro-adjustment component in Figure 14 from different directions.

[0047] Figure 17 is a cross-sectional view of the first micro-adjustment component.

[0048] Figure 18 is a magnified view of part A in Figure 8.

[0049] Figure 19 is a schematic diagram of the internal structure of a seat.

[0050] Figure 20 is a schematic diagram of the internal structure of a seat (without mounting parts) in use.

[0051] Figure 21 is a schematic diagram of the internal structure of another embodiment (without mounting parts).

[0052] Figure 22 is a schematic diagram of the internal structure in use of another embodiment (without mounting parts).

[0053] Figure 23 is a schematic diagram of the center of gravity when the seat is not reclined.

[0054] Figure 24 is a schematic diagram of the center of gravity when the seat is reclined.

[0055] Figure 25 is a structural schematic diagram of another embodiment of the first micro-adjustment component.

[0056] Figure 26 is an exploded view of the first micro-adjustment component in Figure 25.

[0057] The components include: seat frame 1; base 2; rollers 3; first part 4; second part 5; mounting area 6; elastic support ring 7; elastic connecting part 8; first mounting groove 9; second mounting groove 10; first protrusion 11; second protrusion 12; tilt state 13; height adjustment assembly 14; lumbar support assembly 15; back support assembly 16; first connector 17; second connector 18; fixing part 19; fixing seat 20; elastic element 21; gear shifting part 22; and gear shifting rack. 23; Engaging teeth; 24; First limiting wall; 25; First strip hole; 26; First rotating shaft; 27; First groove; 28; Third protrusion; 29; First through hole; 30; First end; 31; Second end; 32; First gear position; 33; First side wall; 34; Second side wall; 35; First connecting end; 36; Second connecting end; 37; Third connecting end; 38; Fourth connecting end; 39; First micro-adjustment component; 40; Gear switch; 41; Moving part; 42; Mounting cylinder; 43; Baffle; Decorative operation 45. Cover; 46. Protruding plate; 47. Spring; 48. First limiting protrusion; 49. Second limiting protrusion; 50. First soft rubber; 51. Extrusion end; 52. First connecting post; 53. First mounting groove; 54. First connecting thread; 55. First gasket; 56. Second soft rubber; 57. Second connecting post; 58. Second connecting thread; 59. Headrest assembly; 60. Third connecting piece; 61. Fifth connecting end; 62. Sixth connecting end; 63. Seventh connecting end; 64. Third soft rubber; 64. Sacral support assembly 65; First end wall 66; Second end wall 67; Receiving component 68; Linkage structure 69; Control structure 70; Drive component 71; Cylinder pressure block 72; Mounting assembly 73; Linkage assembly 74; Assembly component 75; First mounting component 76; Second mounting component 77; Third mounting component 78; First linkage component 79; Second linkage component 80; Third linkage component 81; Fourth linkage component 82; Fifth linkage component 83; Through hole 84; Handle 85; Positioning engagement part 86; Tooth surface 87. Detailed Implementation

[0058] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings.

[0059] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "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 this application. 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] This invention provides a specific embodiment of a seat, as shown in Figures 1-2, including a seat cushion assembly and a backrest assembly. The seat cushion assembly includes a seat cushion frame 1, which comprises a first part 4 and a second part 5. The first part 4 and the second part 5 are connected, and in the support direction, the first part 4 is located above the second part 5. The first part 4 and the second part 5 are at least partially separated; that is, the first part 4 and the second part 5 can be partially connected and partially separated, or they can be completely separated and connected by an elastic support structure. When the first part 4 is subjected to force, it can elastically move relative to the second part 5. The seat cushion frame 1 supports the user, with the first part 4 located on one side of the user, directly supporting the buttocks and legs. When the first part 4 of the seat cushion frame 1 is subjected to force, because the first part 4 can elastically move relative to the second part 5, when the user adjusts their sitting posture in real time, as the position and magnitude of the force exerted on the first part 4 by the user's buttocks change, the first part 4 can adaptively adjust the support effect on the user's buttocks under the action of elastic force, thereby improving the user's comfort. A base 2 is provided below the seat cushion assembly. The base 2 is used to provide installation and support for the seat cushion assembly and backrest assembly, and the base 2 can be configured to move with casters 3.

[0064] In a preferred embodiment, referring to Figures 2-4, the first part 4 and the second part 5 are partially connected and partially separated, so that the first part 4 is suspended relative to the second part 5 at the separation point; the seat frame 1 is made of metal or plastic. In this embodiment, a soft pad or a mesh covering is provided on the first part 4, which contacts the buttocks of the human body. The second part 5 is used to connect to the base 2. When a person sits on the first part 4 with the soft pad or mesh covering, since the first part 4 can move elastically relative to the second part 5, as the person's sitting posture is adjusted, the first part 4 can cause the soft pad or mesh covering to adjust its support effect on the human body in real time, improving the comfort of the sitting posture and reducing fatigue. With the structure in which the first part 4 and the second part 5 are partially connected and partially separated, so that the first part 4 is suspended relative to the second part 5 at the separation point, the material of the seat frame 1, being metal or plastic, can improve the elastic movement effect between the first part 4 and the second part 5. In addition, the first part 4 can adopt a frame structure, that is, a frame with through holes, or a plate structure. In this embodiment, a frame structure is used, which can further improve the elasticity. In this embodiment, the first part 4 and the second part 5 are partially connected and partially separated, and the length of the separated part is greater than the length of the connected part. Specifically, both the first part 4 and the second part 5 are square, and they are connected on the side away from the backrest assembly, while the other three sides are separated, so that the first part 4 forms an opening relative to the second part 5. When the seat frame 1 is made of metal or plastic, this open structure can better improve the elasticity of the first part 4 relative to the second part 5, and improve the user's comfort.

[0065] In a preferred embodiment, referring to Figure 2, the installation area 6 is formed at the position where the first part 4 and the second part 5 are separated. An elastic support structure is provided in the installation area 6. Specifically, the elastic support structure is located in the installation area 6 and is sandwiched between the first part 4 and the second part 5. The elastic support structure provides elastic support force to the first part 4, thereby further improving the elastic movement effect of the first part 4 relative to the second part 5 and improving the user's comfort.

[0066] In preferred embodiments, the elastic support structure has multiple implementations. The present invention provides the following specific implementations: First implementation: Referring to Figures 1-4, the elastic support structure includes two elastic support rings 7 and an elastic connecting portion 8. The elastic support rings 7 are annular, and the two elastic support rings 7 are located at both ends of the elastic connecting portion 8 and are respectively connected to the corresponding ends of the elastic connecting portion 8. When the elastic support structure is installed in the installation area 6, the two elastic support rings 7 and the elastic connecting portion 8 are sandwiched between the first part 4 and the second part 5. The elastic support rings 7 and the elastic connecting portion 8 are an integral structure, using materials with good elasticity such as silicone or rubber. Made of high-quality materials, the elastic support structure described above allows the annular elastic support rings 7 to be located on both sides of the seat cushion assembly, that is, on both sides of the user's buttocks and legs. This enhances the range of elastic movement of the first part 4, providing better elastic support for the user, conforming more closely to the shape of the human buttocks, and making the sitting posture more comfortable. In addition, referring to Figures 3-4, the first part 4 is provided with a first mounting groove 9, and the second part 5 is provided with a second mounting groove 10. The first protrusion 11 and the second protrusion 12 can be provided on both elastic support rings 7 and the elastic connecting part 8 simultaneously, or only on one or all three of the two elastic support rings 7 and the elastic connecting part 8. The second part 4 is provided with a first protrusion 11 and a second protrusion 12, such that the first protrusion 11 is inserted into the first assembly groove 9 and the second protrusion 12 is inserted into the second assembly groove 10. Specifically, in this embodiment, the first protrusion 11 and the second protrusion 12 are simultaneously provided on the two elastic support rings 7 and the elastic connecting part 8. The first protrusion 11 on the two elastic support rings 7 and the elastic connecting part 8 are sequentially connected to form a continuous first ridge, and the second protrusion 12 on the two elastic support rings 7 and the elastic connecting part 8 are sequentially connected to form a continuous second ridge. The first ridge is inserted entirely into the first assembly groove 9 on the first part 4, and the second ridge is inserted entirely into the second part 5. The second mounting slot 10 is used to securely install the elastic support structure between the first part 4 and the second part 5. Furthermore, the two sides of the first part 4 are inclined upwards 13, and a portion of the mounting area 6 is located between the inclined portion of the first part 4 and the second part 5, so that a portion of the mounting area 6 is inclined. Specifically, the portion of the mounting area 6 used to install the elastic support ring 7 is located between the inclined portion of the first part 4 and the second part 5, so that the elastic support ring 7 is inclined from bottom to top and from inside to outside. This structure allows the user's buttocks and thighs to avoid the edge of the seat frame 1, preventing user discomfort.

[0067] A second embodiment of the elastic support structure: Referring to Figure 5, the elastic support structure may include multiple springs, which are spaced apart in the mounting area 6 and clamped between the first part 4 and the second part 5. The positioning connection of the springs between the first part 4 and the second part 5 can be achieved by providing mounting grooves on the first part 4 and the second part 5 respectively, so that one end of the spring is connected to the mounting groove on the first part 4 and the other end is connected to the mounting groove on the second part 5. Similarly, the two sides of the first part 4 are inclined upwards. A portion of the mounting area 6 is located between the inclined portion of the first part 4 and the second part 5, so that a portion of the mounting area 6 is inclined. Specifically, the part of the mounting area 6 used to install some springs is located between the inclined portion of the first part 4 and the second part 5, so that this part of the spring is inclined from bottom to top and from inside to outside.

[0068] A third embodiment of the elastic support structure: Referring to Figure 6, the elastic support structure may include multiple spring pieces, which are spaced apart in the mounting area 6 and clamped between the first part 4 and the second part 5. The positioning connection between the spring pieces and the first part 4 and the second part 5 can be achieved by connecting one end of the spring piece to the first part 4 and the other end to the second part 5. The connection method can be a detachable connection using fasteners such as bolts, so that one end of the spring is connected to the mounting groove on the first part 4 and the other end is connected to the mounting groove on the second part 5. Similarly, the two sides of the first part 4 are in an upward inclined state. A portion of the mounting area 6 is located between the inclined portion of the first part 4 and the second part 5, so that a portion of the mounting area 6 is in an inclined state. Specifically, the part of the mounting area 6 used to install a portion of the spring is located between the inclined portion of the first part 4 and the second part 5, so that the portion of the spring is in an inclined state from bottom to top and from inside to outside.

[0069] In a preferred embodiment, the backrest assembly is connected to the base 2 via a lifting adjustment assembly 14. The lifting adjustment assembly 14 causes the backrest assembly to rise or fall relative to the seat cushion assembly, thereby adjusting the height of the backrest assembly according to the user's height and providing better support. The backrest assembly can be a single unit, having both lumbar support and back support components, simply by connecting the lifting adjustment assembly 14 to this single unit. Alternatively, the backrest assembly can be formed independently by lumbar support components 15 and back support components 16, and connected to each other via a first connector 17. Specifically, the seat also includes a second connector 18. The lifting adjustment assembly 14 is positioned between the first connector 17 and the second connector 18, which is also connected to the base 2. The lifting adjustment assembly 14 causes the first connector 17 to drive the back support components 16 and lumbar support components 15 to rise and fall synchronously.In this embodiment, referring to Figures 7-13, the lifting adjustment assembly 14 includes a fixing member 19, a fixing base 20, an elastic member 21, and a stop member 22. The fixing member 19 can be directly connected to the backrest assembly, or it can be indirectly connected to the backrest assembly through the first connecting member 17. In this embodiment, the fixing member 19 is indirectly connected to the backrest assembly through the first connecting member 17. The fixing base 20 can be directly connected to the base 2, or it can be indirectly connected to the base 2 through the second connecting member 18. In this embodiment, the fixing base 20 is indirectly connected to the base through the second connecting member 18. 2. The gear shift member 22 is rotatably connected to the fixed seat 20. The fixed member 19 is sleeved on the periphery of the fixed seat 20 and can slide relative to it in the direction of seat height. A gear shift rack 23 is provided on one inner side wall of the fixed member 19, and a locking tooth 24 is provided on one side wall of the gear shift member 22. The locking tooth 24 of the gear shift member 22 engages with the gear shift rack 23 on the fixed member 19. An elastic member 21 is provided between the gear shift member 22 and the fixed seat 20. The elastic member 21 causes the locking tooth 24 on the gear shift member 22 to engage with the locking tooth 23 on the fixed member 19. The gear rack 23 engages, and the user can overcome the elastic force of the elastic element 21 by moving the backrest assembly up and down. This causes the fixing element 19 to reciprocate relative to the fixing seat 20 in its length direction. The preload generated by the elastic element 21 causes the gear shifting element 22 to always tend to move towards the gear rack 23. When the engaging tooth 24 corresponds to any groove on the gear rack 23, the gear shifting element 22 moves towards the gear rack 23 on the fixing element 19 under the action of the elastic element 21, and the engaging tooth 24 engages in the gear rack 23. The position of the fixing member 19 is determined. When the gear shift member 22 needs to be unlocked, the backrest assembly is moved to force the gear shift rack 23 in the fixing member 19 to press against the engaging tooth 24 on the gear shift member 22, forcing it to rotate away from the gear shift rack 23 and disengage from it. At the same time, the elastic member 21 is compressed. When the fixing member 19 moves up and down so that the next groove on the gear shift rack 23 is opposite to the engaging tooth 24, the engaging tooth 24 engages with the gear shift rack 23 again under the action of the elastic member 21, so that the backrest assembly is stabilized at that height. There is at least one set of lifting adjustment components 14. When there is only one set, the lifting adjustment components 14 can be set between the middle of the first connecting member 17 and the middle of the second connecting member 18. Alternatively, two sets can be used, symmetrically arranged on the first connecting member 17 and also located between the first connecting member 17 and the second connecting member 18.

[0070] In a preferred embodiment, referring to Figures 13-1 to 13-3, a first limiting wall 25 is provided inside the fixed base 20, and first strip holes 26 are respectively provided on the two opposite side walls of the fixed base 20. The lifting adjustment assembly 14 also includes a first rotating shaft 27, and a stop member 22 is sleeved on the first rotating shaft 27. The two ends of the first rotating shaft 27 extend into the corresponding first strip holes 26, and can reciprocate within the first strip holes 26 under the action of the fixing member 19. In the first state, the first rotating shaft 27 is positioned with the first strip hole 26 at the lower position. At the first end 31, the gear shift member 22 is disengaged from the first limiting wall 25. Under the action of the elastic member 21, the engaging teeth 24 on the gear shift member 22 engage with the gear shift rack 23 on the fixing member 19, and the waist support assembly 15 is in an adjustable height state. In the second state, the first rotating shaft 27 is located at the second end 32 above the first strip hole 26, and the gear shift member 22 contacts the first limiting wall 25 to restrict the engaging teeth 24 on the gear shift member 22 from engaging with the gear shift rack 23 on the fixing member 19. The waist support assembly 15 is in a state where it can fall back to the lowest gear. Specifically, a first groove 28 is provided on the inner wall of the fixing member 19, and the first groove 28 is opposite to the gear rack 23. A third protrusion 29 is provided on the gear member 22, and a first through hole 30 is provided on the fixing seat 20 for the third protrusion 29 of the gear member 22 to pass through. After the third protrusion 29 on the gear member 22 passes through the first through hole 30 on the fixing seat 20, it extends into the first groove 28 on the fixing member 19. Each tooth on the gear rack 23 corresponds to a height setting. When the backrest assembly is in one of the height settings, if the user needs to raise the backrest assembly, in this state, the gear member 22 disengages from the first limiting wall 25. Under the action of the elastic member 21, the engaging teeth 24 on the gear member 22 mesh with the gear rack 23, and the first rotating shaft 27 is positioned... At the lower end of the first strip hole 26 (also referred to as "first end 31"), the third protrusion 29 retracts into the fixing seat 20 and disengages from the first groove 28 on the fixing member 19. By lifting the backrest assembly upward, the backrest assembly drives the first connecting member 17 to move upward, and the first connecting member 17 drives the fixing member 19 to move upward. At this time, the teeth in the gear rack 23 on the fixing member 19 push the gear member 22 to rotate, so as to force the engaging teeth 24 on the gear member 22 to disengage from the tooth groove on the gear rack 23, and at the same time compress the elastic member 21. After the fixing member 19 moves to the backrest assembly to a suitable height, the gear member 22 returns to the position under the elastic action of the elastic member 21 so that the engaging teeth 24 and the tooth groove on the gear rack 23 opposite to it mesh, so as to fix the height of the backrest assembly.If the user needs to lower the backrest assembly, the backrest assembly must first be returned to its lowest position before adjusting it to the desired height as described above. Specifically, the backrest assembly is continuously pulled up, causing the first groove 28 on the fixing member 19 to rise continuously. During the process of the backrest assembly rising to the highest position, the stop member 22 is acted upon by the teeth in the stop rack 23, causing the engaging teeth 24 on the stop member 22 to remain disengaged from the stop rack 23. At this time, the third protrusion 29 on the stop member 22 passes through the first through hole 30 on the fixing base 20 and extends into the first groove 28 until the first end wall 66 of the first groove 28 at the bottom contacts the third protrusion 29, causing the stop member 22 to move upward, so that the first rotating shaft 27 moves to the upper end (also referred to as the "second end 32") of the first strip hole 26. At this time, the stop member 22 contacts the first limiting wall 25, which restricts the stop member 22 under the action of the elastic member 21. Rotation occurs, causing the engaging teeth 24 on the gear shift 22 to remain disengaged from the gear shift rack 23 on the fixing member 19. In this state, the backrest assembly can fall back to the lowest position. At this time, the upper second end wall 67 in the first groove 28 on the fixing member 19 contacts the third protrusion 29 of the gear shift 22. Then, to raise the backrest assembly from the lowest position, the backrest assembly must first be pushed down, causing the second end wall in the first groove 28 on the fixing member 19 to press down on the third protrusion 29 on the gear shift 22, so that the gear shift 22 and the first rotating shaft 27 move down to the first end 31 of the first strip hole 26. At this time, the gear shift 22 disengages from the first limiting wall 25. Since the gear shift 22 is no longer restricted by the first limiting wall 25, under the action of the elastic member 21, the engaging teeth 24 on the gear shift 22 can be engaged into the groove corresponding to the first gear 33 in the gear shift rack 23 on the fixing member 19. At this time, the backrest assembly can be raised normally. In addition, in this embodiment, referring to Figure 13, the teeth on the gear rack 23 have a first sidewall 34 and a second sidewall 35. The first sidewall 34 is planar and can contact the upper surface of the engaging teeth 24 on the gear member 22, preventing the fixing member 19 from slipping down with the backrest assembly and failing to effectively fix the height of the backrest assembly. The second sidewall 35 is inclined and can contact the lower surface (which is inclined) of the engaging teeth 24 on the gear member 22. When the backrest assembly is lifted upward, the gear rack 23 can easily push the gear member 22 to rotate around the first rotation axis 27.

[0071] In a preferred embodiment, the backrest assembly includes a back support assembly 16 and a lumbar support assembly 15, which are connected by a first connector 17. The first connector 17 includes a first connecting end 36, a second connecting end 37, a third connecting end 38, and a fourth connecting end 39. The first connecting end 36 and the second connecting end 37 are respectively located on both sides of the lumbar support assembly 15 and connected thereto. The third connecting end 38 and the fourth connecting end 39 are respectively located on both sides of the back support assembly 16 and connected thereto. Specifically, the first connecting end 36 of the first connector 17 and the lumbar support assembly 15 or the second connecting end 37 of the first connector 17 and the lumbar support assembly 15 can be connected. The first micro-adjustment component 40 can be provided simultaneously between the first connecting end 36 of the first connector 17 and the lumbar support component 15, and between the second connecting end 37 of the first connector 17 and the lumbar support component 15. By connecting each connecting end on the first connector 17 to both sides of the back support component 16 or to both sides of the lumbar support component 15, and providing the first micro-adjustment component 40 at the connection point, the lumbar support component 15 or the back support component 16 can make a slight sway when the user's waist and back move, so as to adapt to the position of the user's waist and back after adjusting the posture, making the backrest component fit the user's waist and back better and providing better comfort.

[0072] In a preferred embodiment, the connection points of the first connecting end 36 and the second connecting end 37 with the lumbar support component 15 are located on the horizontal center line of the lumbar support component 15; the connection points of the third connecting end 38 and the fourth connecting end 39 with the back support component 16 are located on the horizontal center line of the back support component 16. This allows the lumbar support component 15 or the back support component 16 to swing slightly with the movement of the user's waist and back, thereby better conforming to the user's waist and back, providing better comfort and support for the waist and back.

[0073] In this embodiment, referring to Figures 14 and 25, the first micro-adjustment component 40 includes a gear switch 41, a movable component 42 that cooperates with the gear switch 41 and is capable of elastic movement, and a first fixing component. The gear switch 41 and the movable component 42 are disposed on the first connecting member 17 or the waist support component 15. That is, the gear switch 41 and the movable component 42 can be disposed on the first connecting member 17 or the waist support component 15 at the same time. In this embodiment, the specific implementation is that they are disposed on the first connecting member 17. The first fixing component is connected to the movable component 42 to connect the first connecting member 17 and the waist support component 15. When the gear switch 41 and the movable component 42 are disposed on the first connecting member 17, the first fixing component is disposed on the waist support component 15. The movable component 42 can be unlocked or locked by adjusting the gear switch 41, and the movable component 42 can be moved back and forth in the horizontal direction by squeezing or loosening the waist support component 15. The first micro-adjustment component 40 allows the lumbar support component 15 to reciprocate in a direction closer to or further from the user's waist, adapting to the user's waist position and providing better support. Furthermore, since the lumbar support component 15 and the back support component 16 are connected by the first connector 17, after adjusting the distance between the lumbar support component 15 and the user's waist using the first micro-adjustment component 40, the first connector 17 can drive the back support component 16 to move in the same direction. This allows the back support component 16 to adaptively adjust its distance relative to the user's back, achieving synchronized movement of the lumbar support component 15 and the back support component 16, providing better support for the user's lower back and enhancing comfort.

[0074] This embodiment provides specific implementation methods for various connection methods of the first micro-adjustment component 40. First implementation: Referring to Figures 14-17, a mounting cylinder 43 is provided on the first connector 17. In this embodiment, a through hole inside the mounting cylinder 43 extends axially through both ends of the mounting cylinder 43, and a baffle 44 is provided inside the through hole. The gear switch 41 is located inside the mounting cylinder 43. Specifically, the gear switch 41 has a first connecting part, a second connecting part, and a third connecting part connected in sequence. The first connecting part passes through the baffle 44 and is connected to a decorative operating cover 45 installed in the through hole. One end of the second connecting part is connected to the first connecting part, and the other end is connected to the third connecting part. Multiple protrusions 46 are spaced apart on the side wall of the second connecting part, and a spring 47... These protrusions 46 are then fitted onto these protrusions 46, thereby reducing the contact area between the spring 47 and the gear switch 41, and preventing excessive friction between the gear switch 41 and the elastic element when the switch rotates. The third connecting part extends into the moving part 42. Multiple first limiting protrusions 48 are spaced apart along the axial direction on the third connecting part, and at least one second limiting protrusion 49 is spaced apart along the axial direction inside the moving part 42. Alternatively, at least one first limiting protrusion 48 is spaced apart along the axial direction on the third connecting part, and multiple second limiting protrusions 49 are spaced apart along the axial direction inside the moving part 42. Or, multiple first limiting protrusions 48 can be spaced apart along the axial direction on the third connecting part. Multiple second limiting protrusions 49 are spaced apart along the axial direction inside the movable part 42, which can limit the movement of the movable part 42 and the gear switch 41. Specifically, when the gear switch 41 is rotated until the first limiting protrusion 48 disengages from the second limiting protrusion 49, which can also be understood as the first limiting protrusion 48 and the second limiting protrusion 49 being axially misaligned and no longer meshing, the waist support assembly 15 can be squeezed or released to cause the movable part 42 to compress or release the spring 47. After adjusting the waist support assembly 15 to a suitable position, the gear switch 41 is rotated again so that the first limiting protrusions 48 on the three parts re-engage with the spring 47 inside the movable part 42. The second limiting protrusion 49 engages to prevent the waist support assembly 15 from moving and keep it in the desired position; at least part of the moving part 42 is located inside the mounting cylinder 43. Specifically, the part of the moving part 42 that is assembled with the gear switch 41 is located inside the mounting cylinder 43, as shown in FIG17, while the part for squeezing the first soft rubber 50 is located outside the mounting cylinder 43. The part of the moving part 42 for squeezing the first soft rubber 50 includes a disc-shaped squeezing end 51. A hollow first connecting post 52 is provided in the squeezing end 51. The first connecting post 52 passes through the first soft rubber 50 and is connected to the first fixing assembly, while the squeezing end 51 contacts the first soft rubber 50.A first mounting groove 53 is provided on the lumbar support assembly 15, and a first soft rubber 50 is provided in the first mounting groove 53. A portion of the movable member 42 passes through the first soft rubber 50 and is connected to the portion of the first fixing assembly that passes through the first mounting groove 53. Specifically, the first fixing assembly includes a first connecting threaded member 54 and a first washer 55. The first connecting threaded member 54 passes through the first washer 55 and the first mounting groove 53 and is screwed into the first connecting post 52 of the movable member 42 to connect the first connecting member 17 to the lumbar support assembly 15. A sleeve is provided inside the mounting cylinder 43. The spring 47 on the position switch 41 has one end abutting against the end of the mounting cylinder 43, that is, against the baffle 44 inside the mounting cylinder 43, and the other end abutting against the end of the moving member 42. Because the first soft rubber 50 is provided between the first connecting member 17 and the lumbar support assembly 15, when the user sits in the seat and adjusts their posture or moves their back, the lumbar support assembly 15 can swing accordingly with the constantly changing force applied by the user during movement, thus allowing the lumbar support assembly 15 to better conform to the human waist, providing better support and greater comfort. The second embodiment differs from the first embodiment in that the positions of the mounting cylinder 43 and the first mounting groove 53 are interchanged. That is, the mounting cylinder 43 is set on the lumbar support assembly 15, while the first mounting groove 53 is set on the first connecting member 17. The remaining structure is the same as in the first embodiment and will not be described again here. The third embodiment: Referring to Figures 25-26, a mounting cylinder 43 is provided on the first connecting member 17. In this embodiment, the blind hole inside the mounting cylinder 43 is arranged along the axial direction of the mounting cylinder 43, and a through hole 84 is provided on the mounting cylinder 43. The through hole 84 allows the handle 85 of the gear switch 41 to pass through, and the positioning engagement part 86 of the gear switch 41 is eccentrically rotatably connected in the through hole. Specifically, the gear switch 41 includes a handle 85 and a positioning engagement part 86 connected to the handle 85. The positioning engagement part 86 of the gear switch is provided with engagement teeth. In addition, the positioning engagement part 86 is provided with... An eccentric shaft is rotatably connected in the through hole 84; at least part of the moving part 42 is located inside the mounting cylinder 43. Specifically, the part of the moving part 42 that is assembled with the gear switch 41 is located inside the mounting cylinder 43, while the part for squeezing the first soft rubber 50 is located outside the mounting cylinder 43. The part of the moving part 42 for squeezing the first soft rubber 50 includes a disc-shaped squeezing end 51. A hollow first connecting post 52 is provided in the squeezing end 51. The first connecting post 52 passes through the first soft rubber 50 and is connected to the first fixing component, while the squeezing end 51 contacts the first soft rubber 50.A first mounting groove 53 is provided on the lumbar support assembly 15. A first soft rubber 50 is provided in the first mounting groove 53. A portion of the movable member 42 passes through the first soft rubber 50 and is connected to the portion of the first fixing assembly that passes through the first mounting groove 53. Specifically, the first fixing assembly includes a first connecting thread 54 and a first washer 55. The first connecting thread 54 passes through the first washer 55 and the first mounting groove 53 and is screwed into the first connecting post 52 of the movable member 42 to connect the first connecting member 17 to the lumbar support assembly 15. A spring 47 is provided in the mounting cylinder 43. One end of the spring 47 abuts against the end of the blind hole in the mounting cylinder 43, and the other end abuts against the end of the movable member 42. The cross-section of the portion of the movable member 42 located in the mounting cylinder 43 is arc-shaped, and its three-dimensional shape is composed of... A flat surface and an arc-shaped surface are formed. On the flat surface, a toothed surface 87 is provided along the axial direction to engage with the meshing teeth on the gear switch 41. By rotating the gear switch 41, the meshing teeth on the positioning meshing part 86 engage or disengage with the toothed surface 87 on the moving part 42 under eccentric movement, so as to lock or unlock the moving part and keep it in the desired position, thereby fixing the position of the lumbar support assembly 15. Since the first soft rubber 50 is provided between the first connecting part 17 and the lumbar support assembly 15, when the user sits on the seat to adjust his posture and move his back, the lumbar support assembly 15 can swing accordingly with the constantly changing force applied by the user during the movement, so that the lumbar support assembly 15 can better fit the human waist, provide better support, and be more comfortable to use. The fourth embodiment differs from the third embodiment in that the positions of the mounting cylinder 43 and the first mounting groove 53 are interchanged. Specifically, the mounting cylinder 43 is positioned on the waist support assembly 15, while the first mounting groove 53 is positioned on the first connector 17. The remaining structure is the same as the third embodiment and will not be described again here. The third embodiment is simpler in structure, more convenient to operate, and more practical.

[0075] In a preferred embodiment, referring to Figures 8-9, a second micro-adjustment component is provided between the third connecting end 38 of the first connector 17 and the back support assembly 16, and between the fourth connecting end 39 of the first connector 17 and the back support assembly 16. The structure of the second micro-adjustment component, used in at least one of the two connections between the third connecting end 38 of the first connector 17 and the back support assembly 16, and between the fourth connecting end 39 of the first connector 17 and the back support assembly 16, is as follows: The second micro-adjustment component includes a second soft adhesive 56 and a second fixing component. The second soft adhesive 56 is disposed between the first connector 17 and the back support assembly 16. Specifically, the second soft adhesive 56 is disposed between the third connecting end 38 of the first connector 17 and the back support assembly 16, and between the fourth connecting end 39 of the first connector 17 and the back support assembly 16. Part of connector 17 passes through the second soft rubber 56 and connects to the part of the second fixing component that passes through the back support component 16. That is, the third connecting end 38 and the fourth connecting end 39 of the first connector 17 are respectively provided with second connecting posts 57. The second fixing component includes a second connecting thread 58 and a second washer. The second connecting thread 58 in the second fixing component passes through the second washer and the back support component 16 and is screwed into the second connecting post 57 to connect the first connector 17 and the back support component 16 and clamp the second soft rubber 56 between the first connector 17 and the back support component 16. Alternatively, the second connecting post 57 can be set on the back support component 16, and the second connecting thread 58 of the second fixing component passes through the second washer and the first connector 17 and is screwed into the corresponding second connecting post 57 on the back support component 16. By incorporating the second soft rubber 56, the back support component 16 can sway accordingly with the constantly changing forces applied by the user as they adjust their posture and move their back while seated. This allows the back support component 16 to better conform to the user's back, providing better support and greater comfort. Through the combined action of the first micro-adjustment component 40, the second micro-adjustment component, and the first connector 17, the entire backrest assembly can move accordingly with the user's back movements, ensuring it always conforms to the user's back and provides better support and enhanced comfort.

[0076] In a preferred embodiment, referring to Figures 9 and 18, the seat further includes a headrest assembly 59, which is located above the backrest assembly. The headrest assembly 59 is connected to a third connector 60, which is rotatably connected to a second connector 18. The second connector 18 is connected to the base 2 and is also connected to a first connector 17. The third connector 60 includes a fifth connecting end 61, a sixth connecting end 62, and a seventh connecting end 63. The fifth connecting end 61 is rotatably connected to the second connector 18. The sixth connecting end 62 and the seventh connecting end 63 are respectively located on both sides of the headrest assembly 59 and connected thereto. The connection points of the sixth connecting end 62 and the seventh connecting end 63 with the headrest assembly 59 are located on the horizontal center line of the headrest assembly 59. The sixth connecting end 62 and the seventh connecting end 63 of the third connector 60 are connected to both sides of the headrest assembly 59, and the connection point is located on the horizontal center line of the headrest assembly 59. Therefore, the headrest assembly 59 can better move slightly with the movement of the user's head and neck, thus better fitting the back of the user's head and neck, providing better comfort and support for the head and neck.

[0077] In a preferred embodiment, a third micro-adjustment component is provided between the sixth connecting end 62 of the third connector 60 and the headrest assembly 59, and between the seventh connecting end 63 of the third connector 60 and the headrest assembly 59. The structure of the third micro-adjustment component used in at least one of the following applications is as follows: The third micro-adjustment component includes a third soft rubber 64 and a third fixing component. The third soft rubber 64 is disposed between the third connector 60 and the headrest assembly 59. A portion of the third connector 60 passes through the third soft rubber 64 and is connected to the portion of the third fixing component that passes through the headrest assembly 59. The third fixing component connects the third connector 60 and the headrest assembly 59 and clamps the third soft rubber 64 between them. Specifically, the third soft rubber 64 is disposed between the third connector 60 and the headrest assembly 59. Between the sixth connecting end 62 of the third connector 60 and the headrest assembly 59, and between the seventh connecting end 63 of the third connector 60 and the headrest assembly 59, a portion of the third connector 60 passes through the third soft rubber 64 and connects to the portion of the third fixing component that passes through the headrest assembly 59. That is, a third connecting post is provided at the sixth connecting end 62 and the seventh connecting end 63 of the third connector 60. The third fixing component includes a third connecting thread and a third gasket. The third connecting thread in the third fixing component passes through the third gasket and the headrest assembly 59 and is screwed into the third connecting post to connect the third connector 60 to the headrest assembly 59 and clamp the third soft rubber 64 between the third connector 60 and the headrest assembly 59. Alternatively, the third connecting post can be provided on the headrest assembly 59, and the third connecting thread of the third fixing component passes through the third gasket and the third connector 60 and is screwed into the corresponding third connecting post on the headrest assembly 59. By incorporating the third soft rubber 64, the headrest assembly 59 can oscillate accordingly with the changing forces exerted by the user's head and neck as they adjust their posture and move their head and neck while seated. This allows the headrest assembly 59 to better conform to the back of the head and neck, providing superior support and greater comfort. Through the elastic movement of the seat cushion assembly, and the combined action of the first micro-adjustment assembly 40, the second micro-adjustment assembly, the third micro-adjustment assembly, the first connector 17, the second connector 18, and the third connector 60, the seat cushion assembly, backrest assembly, and headrest assembly 59 can generate corresponding micro-movements following the user's body movements, providing better support and making the entire seat ergonomic, improving comfort, and promoting a more scientific and healthy user experience.

[0078] Furthermore, in this embodiment, referring to Figures 1 and 8, a sacral support component 65 is provided below the backrest assembly. The sacral support component 65 is used to support the user's sacrum. The sacral support component 65 can be connected to the backrest assembly, or it can be connected to the seat cushion assembly or the base 2. Specifically, the sacral support component 65 is located below the lumbar support component 15 of the backrest assembly. A mounting groove matching the shape of the sacral support component 65 is provided at the bottom of the lumbar support component 15, and the sacral support component 65 is located in the mounting groove.

[0079] Furthermore, the headrest assembly 59, the lumbar support assembly 15, and the back support assembly 16 can be formed using existing technology, namely, by a frame and a cushion or mesh surface.

[0080] In this embodiment, referring to Figures 19-24, the seat also includes a receiving member 68 and a linkage structure 69. The linkage structure 69 is connected to both the backrest assembly and the receiving member 68. The seat cushion assembly is disposed on the linkage structure 69, and the linkage structure 69 can extend or retract under external force to control the synchronous movement of the backrest assembly and the seat cushion assembly. This causes the center of gravity of the seat in the reclining state (corresponding to the user's lying posture) to shift forward relative to the center of gravity in the non-reclining state (i.e., the supported state, corresponding to the user's sitting posture). The reclining state corresponds to the user being in a lying posture, while the non-reclining state corresponds to the user being in a sitting posture.

[0081] In a preferred embodiment, the seat further includes a control structure 70, which cooperates with the drive component 71 to control the drive component 71 to extend and retract the linkage structure 69. The control structure 70 is a commonly used structure in the art and will not be described in detail here.

[0082] This application also includes a driving member 71 for extending or retracting the linkage structure 69. The driving member 71 is disposed within the receiving member 68 and directly or indirectly drives the linkage structure 69. In this embodiment, it is an electric actuator, and a power supply is provided next to the electric actuator to supply power to it. When the driving member 71 is in the first state (the driving end of the electric actuator is extended), the linkage structure 69 is in the extended state. When the driving member 71 is in the second state (the driving end of the electric actuator is retracted), the linkage structure 69 is in the retracted state. In other embodiments, the driving member 71 may... As a cylinder, when the driving component 71 is in the first state (i.e., the cylinder driving end is extended), the linkage structure 69 is in the retracted state. When the driving component 71 is in the second state (i.e., the cylinder driving end is retracted), the linkage structure 69 is in the extended state. Specifically, as shown in Figures 21-22, a cylinder pressing block 72 is provided in the receiving component 68. The driving end of the cylinder is connected to the cylinder pressing block 72. The control structure 70 pulls the cylinder pressing block 72, and the cylinder pressing block 72 presses down on the driving end of the cylinder. The cylinder shortens under the pressure of the user leaning back, thereby realizing the seat reclining.

[0083] Referring to Figures 19-22, the linkage structure 69 includes a mounting component 73 and a linkage component 74 connected to the mounting component 73. The seat cushion component is mounted on the mounting component 73, and the mounting component 73 is connected to the receiving member 68. When the linkage component 74 extends, the backrest component is in a reclining state, and the mounting component 73 drives the seat cushion component to move away from the backrest component. When the linkage component 74 retracts, the backrest component is in a supported state, and the mounting component 73 drives the seat cushion component to move closer to the backrest component.

[0084] Mounting assembly 73 includes assembly 75, first mounting member 76, second mounting member 77 and third mounting member 78. One end of the first mounting member 76 and the second mounting member 77 are respectively hinged to assembly 75, and the other end of the first mounting member 76 and the second mounting member 77 are respectively hinged to receiving member 68.

[0085] The linkage assembly 74 includes a first linkage member 79, a second linkage member 80, a third linkage member 81, a fourth linkage member 82, and a fifth linkage member 83. The first linkage member 79 is hinged to the assembly member 75 and fixedly connected to the backrest assembly. One end of the second linkage member 80 is hinged to the first linkage member 79, and the other end is hinged to the third linkage member 81. One end of the third linkage member 81 is hinged to the fifth linkage member 83, and the other end is hinged to the fourth linkage member 82. The fourth linkage member 82 is hinged to the third mounting member 78. One end of the fifth linkage member 83 is hinged to the third linkage member 81, and the other end is hinged to the first mounting member 76.

[0086] As the backrest assembly moves backward, the second mounting component 77 drives the seat cushion assembly on the assembly 75 to move forward. This enables the seat cushion assembly and backrest assembly to move the center of gravity of the entire chair forward in a synchronized manner, ensuring safety at large reclining angles and improving user experience and safety. Specifically, as shown in Figure 23, when the seat is not reclined, this is the position of the user's center of gravity Z. As shown in Figure 24, when the seat reclines, its center of gravity moves forward. Because existing seats have their center of gravity shifted backward when reclining, if the center of gravity shifts backward, the user will fall off the seat after reclining to a certain angle. Therefore, this application ensures that the user does not fall off the seat while reclining, and also allows for a larger reclining angle due to the forward shift of the center of gravity. The synchronized movement of the seat cushion assembly and backrest assembly moves the center of gravity of the entire chair forward, ensuring safety at large reclining angles and improving user experience and safety.

[0087] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A seat, comprising a seat cushion assembly and a backrest assembly, wherein the seat cushion assembly includes a seat cushion frame, characterized in that... The cushion frame includes a first part and a second part, which are connected together, and the first part is located above the second part in the support direction; at least part of the first part and the second part are separated, and the first part can elastically move relative to the second part when the first part is subjected to force.

2. The seat according to claim 1, characterized in that: The first part and the second part are partially connected and partially separated, so that the first part is suspended relative to the second part at the separation point; the seat frame is made of metal or plastic.

3. The seat according to claim 1 or 2, characterized in that: The location where the first part and the second part are separated forms an installation area, and an elastic support structure is provided in the installation area.

4. The seat according to claim 3, characterized in that: The elastic support structure includes two elastic support rings and an elastic connecting part. The two elastic support rings are located at both ends of the elastic connecting part and are respectively connected to the corresponding ends of the elastic connecting part. When the elastic support structure is installed in the installation area, the two elastic support rings and the elastic connecting part are clamped between the first part and the second part. Alternatively, the elastic support structure may include multiple springs or multiple spring sheets, which are spaced apart in the mounting area and clamped between the first part and the second part.

5. The seat according to claim 4, characterized in that: A first assembly groove is provided in the first part, and a second assembly groove is provided in the second part. A first protrusion and a second protrusion are provided on two elastic support rings and / or elastic connecting parts. The first protrusion is inserted into the first assembly groove, and the second protrusion is inserted into the second assembly groove.

6. The seat according to claim 3, characterized in that: The first part has two sides that are tilted upwards, and a portion of the installation area is located between the tilted part of the first part and the second part, so that a portion of the installation area is tilted.

7. The seat according to claim 1, characterized in that: The backrest assembly is connected to the base via a lifting adjustment assembly, which causes the backrest assembly to rise or fall relative to the seat cushion assembly.

8. The seat according to claim 1 or 7, characterized in that: The backrest assembly includes a back support assembly and a lumbar support assembly. The back support assembly and the lumbar support assembly are connected by a first connector. The first connector includes a first connecting end, a second connecting end, a third connecting end, and a fourth connecting end. The first connecting end and the second connecting end are respectively located on both sides of the lumbar support assembly and connected thereto. The third connecting end and the fourth connecting end are respectively located on both sides of the back support assembly and connected thereto.

9. The seat according to claim 8, characterized in that: The connection points of the first and second connecting ends with the lumbar support assembly are located on the horizontal center line of the lumbar support assembly; Alternatively, the connection points of the third and fourth connecting ends with the back support assembly are located on the horizontal center line of the back support assembly.

10. The seat according to claim 7, characterized in that: The backrest assembly includes a back support assembly and a lumbar support assembly, which are connected by a first connector. The seat also includes a second connector, and the lifting adjustment assembly is disposed between the first connector and the second connector. The second connector is also connected to the base. The lifting adjustment assembly causes the first connector to drive the back support assembly and the lumbar support assembly to rise and fall synchronously.

11. The seat according to claim 8, characterized in that: A first micro-adjustment component is provided between the first connecting end of the first connector and the lumbar support component and / or between the second connecting end of the first connector and the lumbar support component; the first micro-adjustment component includes a gear switch, a movable component that can move elastically in cooperation with the gear switch, and a first fixing component. The gear switch and the movable component are disposed on the first connector or the lumbar support component. The first connector and the lumbar support component are connected by the first fixing component. The gear switch is adjusted to unlock or lock the movable component, and the lumbar support component is squeezed or loosened to drive the movable component to reciprocate in the horizontal direction.

12. The seat according to claim 11, characterized in that: An mounting cylinder is provided on the first connector, the gear switch is connected to the mounting cylinder, and at least part of the movable part is located inside the mounting cylinder. A first mounting groove is provided on the waist support assembly, and a first soft rubber is provided in the first mounting groove. Part of the movable part passes through the first soft rubber and is connected to the part of the first fixing assembly that passes through the first mounting groove. A spring is provided inside the mounting cylinder and sleeved on the gear switch. One end of the spring abuts against the end of the mounting cylinder, and the other end abuts against the end of the movable part. Alternatively, a mounting cylinder is provided on the waist support assembly, the gear switch is connected to the mounting cylinder, and at least part of the moving part is located inside the mounting cylinder. A first mounting groove is provided on the first connecting member, and a first soft rubber is provided in the first mounting groove. Part of the moving part passes through the first soft rubber and is connected to the part of the first fixing assembly that passes through the first mounting groove. A spring is provided inside the mounting cylinder and sleeved on the gear switch. One end of the spring abuts against the end of the mounting cylinder, and the other end abuts against the end of the moving part.

13. The seat according to claim 11 or 12, characterized in that: A second micro-adjustment component is provided between the third connecting end of the first connector and the back support assembly and / or between the fourth connecting end of the first connector and the back support assembly; The second micro-adjustment component includes a second soft rubber and a second fixing component. The second soft rubber is disposed between the first connector and the back support component. A portion of the first connector passes through the second soft rubber and is connected to the portion of the second fixing component that passes through the back support component. The second fixing component connects the first connector and the back support component and clamps the second soft rubber between the first connector and the back support component. Alternatively, the second micro-adjustment component includes a second soft rubber and a second fixing component. The second soft rubber is disposed between the first connector and the back support component. A portion of the back support component passes through the second soft rubber and is connected to the portion of the second fixing component that passes through the first connector. The second fixing component connects the first connector and the back support component and clamps the second soft rubber between the first connector and the back support component.

14. The seat according to claim 7 or 10, characterized in that: The lifting and adjusting assembly includes a fixing member, a fixing seat, an elastic member, and a stop member. The fixing member is directly or indirectly connected to the backrest assembly, the fixing seat is directly or indirectly connected to the base, and the stop member is rotatably connected to the fixing seat. The fixing member is sleeved on the periphery of the fixing seat and can slide relative to it. A stop rack is provided on one inner side wall of the fixing member, and a locking tooth is provided on one side wall of the stop member. The locking tooth of the stop member engages with the stop rack on the fixing member. The elastic member is disposed between the stop member and the fixing seat. The elastic member causes the locking tooth on the stop member to engage with the stop rack on the fixing member. By moving the backrest assembly, the fixing member can be moved back and forth relative to the length direction of the fixing seat, and the elastic member causes the stop member to position the fixing member.

15. The seat according to claim 14, characterized in that: The fixed seat is provided with a first limiting wall and a first strip hole is provided on the two opposite side walls of the fixed seat. The lifting adjustment assembly also includes a first rotating shaft. The gear piece is sleeved on the first rotating shaft. The two ends of the first rotating shaft extend into the first strip hole at the corresponding ends and can reciprocate in the first strip hole under the action of the fixed piece. In the first state, the first rotating shaft is located at the first end below the first strip hole, the gear is disengaged from the first limiting wall, and under the action of the elastic member, the engaging teeth on the gear engage with the gear rack on the fixing member, and the waist support assembly is in an adjustable height state. In the second state, the first rotating shaft is located at the second end above the first strip hole, the gear member is in contact with the first limiting wall to restrict the engagement of the engagement teeth on the gear member with the gear rack on the fixing member, and the waist support assembly is in a state that can be lowered to the lowest gear.

16. The seat according to claim 11, characterized in that: The seat also includes a headrest assembly located above the backrest assembly. The headrest assembly is connected to a third connector, which is rotatably connected to a second connector. The second connector is connected to a base and is also connected to a first connector. The third connector includes a fifth, a sixth, and a seventh connector. The fifth connector is rotatably connected to the second connector. The sixth and seventh connectors are located on opposite sides of the headrest assembly and connected to it. The connection points of the sixth and seventh connectors with the headrest assembly are located on the horizontal center line of the headrest assembly.

17. The seat according to claim 16, characterized in that: A third micro-adjustment component is provided between the sixth connecting end of the third connector and the headrest assembly and / or between the seventh connecting end of the third connector and the headrest assembly; The third micro-adjustment component includes a third soft rubber and a third fixing component. The third soft rubber is disposed between the third connector and the headrest assembly. A portion of the third connector passes through the third soft rubber and is connected to the portion of the third fixing component that passes through the headrest assembly. The third fixing component connects the third connector and the headrest assembly and clamps the third soft rubber between the third connector and the headrest assembly. Alternatively, the third micro-adjustment component includes a third soft rubber and a third fixing component. The third soft rubber is disposed between the third connector and the headrest assembly. A portion of the headrest assembly passes through the third soft rubber and is connected to the portion of the third fixing component that passes through the third connector. The third fixing component connects the third connector and the headrest assembly and clamps the third soft rubber between the third connector and the headrest assembly.

18. The seat according to claim 1, characterized in that: The seat also includes a receiving component and a linkage structure. The linkage structure is connected to the backrest assembly and the receiving component respectively. The seat cushion assembly is disposed on the linkage structure, and the linkage structure can extend or retract under the action of external force to control the backrest assembly and the seat cushion assembly to move synchronously, so that the center of gravity of the seat in the reclining state moves forward relative to the center of gravity in the non-reclining state.

19. The seat according to claim 18, characterized in that: The linkage structure includes an installation component and a linkage component connected to the installation component. The seat cushion component is disposed on the installation component, and the installation component is connected to the receiving component. When the linkage component extends, the backrest component is in a reclining state, and the mounting component drives the seat cushion component to move away from the backrest component. When the linkage component retracts, the backrest component is in a supported state, and the mounting component drives the seat cushion to move closer to the backrest component.

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