Waist and back supporting assembly and seat

Abstract

The utility model relates to the technical field of furniture articles, and particularly discloses a waist and back supporting assembly and a seat, in the waist and back supporting assembly, the waist of a user is supported through a waist supporting assembly, and the back of the user is supported through a back supporting assembly. Due to the fact that the waist supporting assembly and the back supporting assembly are connected through the first connecting piece, when the first micro-motion adjusting assembly between the first connecting piece and the waist supporting assembly is operated, the waist supporting assembly reciprocates in the horizontal direction, and meanwhile the first connecting piece drives the back supporting assembly to move together in the same direction; therefore, it is ensured that the relative position between the back supporting assembly and the waist supporting assembly is always kept in the state of being attached to the waist and the back of the human body, and dislocation faults between the back supporting assembly and the waist supporting assembly in the vertical direction due to the fact that the waist supporting assembly is independently adjusted are avoided. The waist and the back of the user are effectively and comfortably supported, and the use comfort of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture design, and in particular to a waist and back support component and a seat. Background Art

[0002] With the development of society and the continuous improvement of people's living standards, health has become an important topic that people are paying more and more attention to. People usually need to sit at their desks for long periods of time when working or studying, and existing office chairs, gaming chairs or home chairs usually include a seat cushion and a backrest, wherein the seat cushion is used to support the buttocks of the human body, and the backrest is used to support the back of the human body. However, although the existing backrest also includes independent lumbar support and back support, when it is necessary to adaptively adjust the lumbar support relative to the human body according to the user's lumbar position, the lumbar support can be adjusted to move back and forth in a direction close to or away from the user, so that the lumbar support adapts to the user's lumbar position, so as to achieve effective and comfortable support for the user's lumbar position. However, Since the existing backrest support adopts a fixed structure, after adjusting the position of the lumbar support, the lumbar support and the back support will be misaligned in the vertical direction. At this time, if the lumbar support is farther away from the user's waist than the back support, the user's waist will not be effectively supported. If the lumbar support is closer to the user's waist than the back support, the user's back will not be effectively supported. In either state, the user's waist and back will not be effectively supported, resulting in a poor user experience. At the same time, long-term use is not conducive to the user's health. Utility Model Content

[0003] The present invention aims to solve the technical problems existing in the above-mentioned prior art and provide a waist and back support assembly and a seat, so that the user's waist and back can be effectively supported and the user's comfort can be improved.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The utility model describes a waist and back support assembly, comprising a waist support assembly and a back support assembly, wherein the waist support assembly and the back support assembly are connected via a first connecting member, and a first fine-motion adjustment assembly is provided between the waist support assembly and the first connecting member for enabling the waist support assembly to reciprocate in the horizontal direction, wherein the first fine-motion adjustment assembly drives the first connecting member to move, and the first connecting member drives the back support assembly to move.

[0006] The lumbar and back support assembly described in the present invention supports the user's waist through the lumbar support assembly and supports the user's back through the back support assembly. Since the lumbar support assembly and the back support assembly are connected by a first connecting member, when operating the first micro-adjustment assembly between the first connecting member and the lumbar support assembly, the lumbar support assembly moves back and forth in the horizontal direction, and at the same time, the back support assembly is driven to move in the same direction through the first connecting member, thereby ensuring that the relative position between the back support assembly and the lumbar support assembly is always maintained in a state of fitting the human body's waist and back, and no misalignment or fault will occur in the vertical direction between the back support assembly and the lumbar support assembly due to adjusting the lumbar support assembly alone, effectively ensuring that the user's waist and back are effectively and comfortably supported, thereby improving the user's comfort.

[0007] Furthermore, the first micro-adjustment component includes a gear switch, a movable member that can move elastically and cooperates with the gear switch, and a first fixed component. The gear switch and the movable member are arranged on the first connecting member or the lumbar support component, and are connected to the movable member through the first fixed component to connect the first connecting member and the lumbar support component. The gear switch is adjusted to unlock or lock the movable member, and the lumbar support component is squeezed or relaxed to drive the movable member to move back and forth in the horizontal direction, while driving the first connecting member to move.

[0008] Furthermore, a mounting tube is provided on the first connecting member, the gear switch is connected to the mounting tube, the movable member is at least partially located in the mounting tube, a first mounting groove is provided on the lumbar support assembly, a first soft rubber is provided in the first mounting groove, a portion of the movable member passes through the first soft rubber and is connected to a portion of the first fixing assembly that passes through the first mounting groove, a spring sleeved on the gear switch is provided in the mounting tube, one end of the spring abuts against an end portion of the mounting tube, and the other end abuts against an end portion of the movable member;

[0009] Alternatively, a mounting tube is provided on the lumbar support assembly, the gear switch is connected to the mounting tube, and the movable member is also at least partially located in the mounting tube. 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 movable member passes through the first soft rubber and is connected to the part of the first fixed assembly that passes through the first mounting groove. A spring is provided in the mounting tube and is sleeved on the gear switch, and one end of the spring abuts against the end of the mounting tube, and the other end abuts against the end of the movable member.

[0010] Furthermore, the first connecting member includes a first connecting end and a second connecting end, and the first connecting end and the second connecting end are respectively arranged on both sides of the lumbar support component and connected thereto; the first fine-adjustment component is arranged between the first connecting end and the lumbar support component and / or between the second connecting end and the lumbar support component.

[0011] Furthermore, the connection points of the first connection end and the second connection end with the lumbar support assembly are located on the horizontal center line of the lumbar support assembly.

[0012] Furthermore, the first connecting member further includes a third connecting end and a fourth connecting end, and the third connecting end and the fourth connecting end are respectively arranged on both sides of the back support assembly and are movably connected to the back support assembly.

[0013] Furthermore, the connection points of the third and fourth connection ends with the back support assembly are located on the horizontal center line of the back support assembly;

[0014] Alternatively, a second fine-motion adjustment component is arranged between the third connecting end and the back support component and / or between the fourth connecting end and the back support component; the second fine-motion adjustment component includes a second soft glue and a second fixing component, the second soft glue is arranged between the connecting component and the back support component, a part of the connecting component passes through the second soft glue and is connected to the part of the second fixing component passing through the back support component, the connecting component is connected to the back support component through the second fixing component, and the second soft glue is clamped between the connecting component and the back support component; or, the second fine-motion adjustment component includes a second soft glue and a second fixing component, the second soft glue is arranged between the connecting component and the back support component, a part of the back support component passes through the second soft glue and is connected to the part of the second fixing component passing through the connecting component, the connecting component is connected to the back support component through the second fixing component, and the second soft glue is clamped between the connecting component and the back support component.

[0015] Furthermore, it also includes a second connecting member, and a lifting adjustment component is set between the first connecting member and the second connecting member, through which the first connecting member and the second connecting member can move relative to each other, so that the waist support component and the back support component can be raised and lowered.

[0016] Furthermore, the lifting and lowering adjustment assembly includes a fixing member, a fixing seat, an elastic member and a gear member; the fixing member is connected to the first connecting member, the fixing seat is connected to the second connecting member, the gear 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 gear rack is provided on one of the inner side walls of the fixing member, and a locking tooth is provided on one side wall of the gear member, the locking tooth of the gear member is engaged with the gear rack on the fixing member, and the elastic member is provided between the gear member and the fixing seat, and the locking tooth on the gear member is caused to engage with the gear rack on the fixing member through the elastic member, and the fixing member can be driven to move back and forth relative to the length direction of the fixing seat by moving the first connecting member, and the gear member is caused to position the position of the fixing member through the elastic member.

[0017] Furthermore, a first limiting wall is provided in the fixing seat, and first strip holes are respectively provided on two opposite side walls of the fixing seat. The lifting adjustment assembly further includes a first rotating shaft. The shift member is sleeved on the first rotating shaft. Both ends of the first rotating shaft extend into the first strip holes at the corresponding ends, and the first rotating shaft can be reciprocated in the first strip holes under the action of the fixing member.

[0018] In the first state, the first rotating shaft is located at the first end below the first strip hole, the shift member is disengaged from the first limiting wall, and under the action of the elastic member, the engaging teeth on the shift member are engaged with the shift rack on the fixing member, and the lumbar support assembly is in an adjustable height state;

[0019] In the second state, the first rotating shaft is located at the second end above the first bar-shaped hole, and the shift member contacts the first limiting wall to limit the engagement of the engaging teeth on the shift member with the shift rack on the fixing member, and the lumbar support assembly is in a state where it can fall back to the lowest gear.

[0020] The chair of the present invention comprises a seat cushion assembly and armrest assemblies disposed on both sides of the seat cushion assembly. The chair also comprises the aforementioned lumbar and back support assembly. The chair of the present invention, by virtue of having the aforementioned lumbar and back support assembly, possesses all the beneficial technical effects brought about by the lumbar and back support assembly, which will not be detailed here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally scaled to actual size. The emphasis is on illustrating the subject matter of the present invention.

[0022] Figure 1 It is a structural diagram of the seat of the present utility model.

[0023] Figure 2 It is a schematic diagram of the seat cushion component structure.

[0024] Figure 3 and Figure 4 Schematic diagram of the seat cushion assembly in different directions.

[0025] Figure 5 Schematic diagram of another embodiment of the elastic support structure.

[0026] Figure 6 Schematic diagram of another embodiment of the elastic support structure.

[0027] Figure 7 Schematic diagram of the waist and back support component structure.

[0028] Figure 8 and Figure 9 Schematic diagram of the decomposition of the lumbar and back support components in different directions.

[0029] Figure 10 It is a schematic diagram of the lifting and adjusting component structure.

[0030] Figure 11 and Figure 12 Schematic diagram of the decomposition of the lifting and adjusting components in different directions.

[0031] Figures 13-1 to 13-3 It is a cross-sectional view of the lifting and adjusting component in various states.

[0032] Figure 14 This is a structural diagram of one embodiment of the first fine-motion adjustment component.

[0033] Figure 15 and Figure 16 for Figure 14 Schematic diagram of the decomposition of the first micro-adjustment component in different directions.

[0034] Figure 17 It is a partial cross-sectional view of the first fine-motion adjustment component.

[0035] Figure 18 for Figure 8 A partial enlarged view of part A.

[0036] Figure 19 This is a structural diagram of another embodiment of the first fine-motion adjustment component.

[0037] Figure 20 for Figure 19 Schematic diagram of the exploded view of the first micro-adjustment component.

[0038] Among them, the cushion frame 1; the base 2; the roller 3; the first part 4; the second part 5; the installation area 6; the elastic support ring 7; the elastic connection part 8; the first assembly groove 9; the second assembly groove 10; the first protrusion 11; the second protrusion 12; the tilt state 13; the lifting adjustment component 14; the lumbar support component 15; the back support component 16; the first connecting member 17; the second connecting member 18; the fixing member 19; the fixing seat 20; the elastic member 21; the gear member 22; the gear rack 23; the engaging tooth 24; the first limiting wall 25; the first strip hole 26; the first rotating shaft 27; the first groove 28; the third protrusion 29; the first through hole 30; the first end 31; the second end 32; the first gear 33; the first side wall 34; the second side wall 35; the first connecting end 36; the second connecting end 37 ; third connecting end 38; fourth connecting end 39; first micro-adjustment assembly 40; gear switch 41; moving part 42; mounting tube 43; baffle 44; decorative operating cover 45; convex plate 46; spring 47; first limiting protrusion 48; second limiting protrusion 49; first soft glue 50; extrusion end 51; first connecting column 52; first mounting groove 53; first connecting thread 54; first gasket 55; second soft glue 56; second connecting column 57; second connecting thread 58; headrest assembly 59; third connecting member 60; fifth connecting end 61; sixth connecting end 62; seventh connecting end 63; third soft glue 64; sacrum support assembly 65; first end wall 66; second end wall 67; armrest assembly 68; through hole 84; handle 85; positioning engaging portion 86; tooth surface 87. DETAILED DESCRIPTION

[0039] In order to facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0040] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0042] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0044] The utility model provides a specific implementation of a waist and back support assembly. Figure 1 And 8-18, including a lumbar support assembly 15 and a back support assembly 16, the lumbar support assembly 15 and the back support assembly 16 are connected by a first connecting member 17, and a first fine-adjustment assembly 40 is provided between the lumbar support assembly 15 and the first connecting member 17 for enabling the lumbar support assembly 15 to move back and forth in the horizontal direction. The first fine-adjustment assembly 40 drives the first connecting member 17 to move, and the first connecting member 17 drives the back support assembly 16 to move. The user's waist is supported by the lumbar support assembly 15, and the user's back is supported by the back support assembly 16. Since the lumbar support assembly 15 and the back support assembly 16 are connected by the first connecting member 17, when the first micro-adjustment assembly 40 between the first connecting member 17 and the lumbar support assembly 15 is operated, the lumbar support assembly 15 moves back and forth in the horizontal direction, and the back support assembly 16 is driven to move in the same direction by the first connecting member 17, thereby ensuring that the relative position between the back support assembly 16 and the lumbar support assembly 15 is always maintained in a state of fitting the human body's waist and back, and there will be no vertical misalignment or fault between the back support assembly 16 and the lumbar support assembly 15 due to adjusting the lumbar support assembly 15 alone, effectively ensuring that the user's waist and back are effectively and comfortably supported, thereby improving the user's comfort.

[0045] In the preferred embodiment, see Figure 14 The first micro-adjustment component 40 includes a gear switch 41, a movable member 42 that can move elastically with the gear switch 41, and a first fixed component; the gear switch 41 and the movable member 42 are arranged on the first connecting member 17 or the lumbar support component 15, that is, the gear switch 41 and the movable member 42 can be arranged on the first connecting member 17 at the same time, or on the lumbar support component 15 at the same time. The specific implementation shown in this embodiment is that they are arranged on the first connecting member 17; the first fixing component is connected to the movable member 42 to connect the first connecting member 17 and the lumbar support component 15. When the gear switch 41 and the movable member 42 are arranged on the first connecting member 17, the first fixed component is arranged on the lumbar support component 15. The movable member 42 is unlocked or locked by adjusting the gear switch 41, and the movable member 42 is driven to reciprocate in the horizontal direction by squeezing or loosening the lumbar support component 15, while driving the first connecting member 17 to move. The first micro-adjustment assembly 40 can be used to adjust the lumbar support assembly 15 to reciprocate in a direction closer to or farther from the user's waist, thereby adapting to the user's waist position and better supporting the user's waist. In addition, because the lumbar support assembly 15 and the back support assembly 16 are connected by the first connecting member 17, after the distance of the lumbar support assembly 15 relative to the user's waist is adjusted by the first micro-adjustment assembly 40, the back support assembly 16 can be driven by the first connecting member 17 to move in the same direction, so that the back support assembly 16 adaptively adjusts its distance relative to the user's back, thereby achieving synchronous movement of the lumbar support assembly 15 and the back support assembly 16, providing better support for the user's waist and back, and enhancing comfort.

[0046] In this embodiment, a plurality of specific implementations of the connection method of the first fine adjustment component 40 are provided. Figure 14-17, a mounting tube 43 is provided on the first connecting member 17. In this embodiment, a through hole inside the mounting tube 43 passes through both ends of the mounting tube 43 along the axial direction of the mounting tube 43, and a baffle 44 is provided inside the through hole. The gear switch 41 is located in the mounting tube 43. Specifically, the gear switch 41 has a first connecting portion, a second connecting portion and a third connecting portion connected in sequence. The first connecting portion passes through the baffle 44 and is connected to the decorative operating cover 45 installed in the through hole. One end of the second connecting portion is connected to the first connecting portion, and the other end is connected to the third connecting portion. The second connecting portion is connected to the first connecting portion and the other end is connected to the third connecting portion. A plurality of convex plates 46 are arranged at intervals on the side wall, and the spring 47 is sleeved on these convex plates 46, thereby reducing the contact area between the spring 47 and the gear switch 41, avoiding large friction between the gear switch 41 and the elasticity when the gear switch 41 rotates, and the third connecting portion extends into the interior of the moving member 42, and a plurality of first limiting protrusions 48 are arranged at intervals along the axial direction of the third connecting portion, and at least one second limiting protrusion 49 is arranged at intervals along the axial direction of the moving member 42, or at least one first limiting protrusion 48 is arranged at intervals along the axial direction of the third connecting portion, and the moving member 42 is provided with a plurality of first limiting protrusions 48 at intervals along the axial direction. A plurality of second limiting protrusions 49 are provided inside along the axial intervals thereof, or a plurality of first limiting protrusions 48 are provided on the third connecting portion along the axial intervals thereof, and a plurality of second limiting protrusions 49 are provided inside the movable member 42 along the axial intervals thereof, so as to realize the limiting of the movable member 42 and the gear switch 41. Specifically, when the gear switch 41 rotates until the first limiting protrusion 48 is disengaged from the second limiting protrusion 49, it can also be understood that the first limiting protrusion 48 and the second limiting protrusion 49 are axially dislocated from each other and no longer meshed, and can be pressed or The user relaxes the lumbar support assembly 15, thereby causing the movable member 42 to compress or relax the spring 47. When the lumbar support assembly 15 is adjusted to a suitable position, the gear switch 41 is rotated again so that the first limiting protrusion 48 on the three parts is engaged with the second limiting protrusion 49 inside the movable member 42 again, thereby preventing the lumbar support assembly 15 from moving and keeping it in the desired position; at least a part of the movable member 42 is located in the mounting tube 43, specifically, the part where the movable member 42 and the gear switch 41 are assembled is located in the mounting tube 43, as shown in FIG. Figure 17As shown, the portion for squeezing the first soft glue 50 is located outside the mounting tube 43, and the portion on the movable member 42 for squeezing the first soft glue 50 includes a disc-shaped squeezing end portion 51, and a hollow first connecting column 52 is provided in the squeezing end portion 51. The first connecting column 52 penetrates the first soft glue 50 and is connected to the first fixing component, and the squeezing end portion 51 contacts the first soft glue 50; a first mounting groove 53 is provided on the lumbar support component 15, and the first soft glue 50 is provided in the first mounting groove 53. Part of the movable member 42 passes through the first soft glue 50 and is connected to the portion of the first fixing component that penetrates the first mounting groove 53. Specifically, the first fixing component includes a first connecting screw 54 and a first gasket 55. The first connecting screw 54 penetrates the first gasket 55 and is connected to the first fixing component that penetrates the first mounting groove 53. 5 and the first mounting groove 53 are screwed into the first connecting column 52 of the movable member 42 to connect the first connecting member 17 with the lumbar support assembly 15; a spring 47 is provided in the mounting tube 43 and is sleeved on the gear switch 41, one end of the spring 47 abuts against the end of the mounting tube 43, that is, abuts against the baffle 44 inside the mounting tube 43, and the other end abuts against the end of the movable member 42; since the first soft rubber 50 is provided between the first connecting member 17 and the lumbar support assembly 15, when the user's waist and back move, the lumbar support assembly 15 can squeeze the first soft rubber 50 to generate a corresponding slight swing with the user's waist and back movement, so as to adapt to the user's waist and back position after adjusting the posture, so that the lumbar support assembly fits the user's waist better and is more comfortable to use. The second embodiment: The difference from the first embodiment is that the positions of the mounting tube 43 and the first mounting groove 53 are interchanged, that is, the mounting tube 43 is set on the lumbar support assembly 15, and the first mounting groove 53 is set on the first connecting member 17. The remaining structures refer to the first embodiment and will not be repeated here.The third embodiment: See 19-20, a mounting tube 43 is provided on the first connecting member 17. In this embodiment, the blind hole inside the mounting tube 43 is arranged along the axial direction of the mounting tube 43, and a through hole 84 is provided on the mounting tube 43, and the through hole 84 is for the handle 85 of the gear switch 41 to pass through, and the positioning engaging portion 86 of the gear switch 41 can be eccentrically rotatably connected to the through hole. Specifically, the gear switch 41 includes a handle 85 and a positioning engaging portion 86 connected to the handle 85. The gear switch positioning engaging portion 86 is provided with meshing teeth. In addition, an eccentric shaft is provided on the positioning engaging portion 86, which is rotatably connected to the through hole 84 through the eccentric shaft; the moving member 42 to A small part is located in the mounting tube 43. Specifically, the part where the moving part 42 and the gear switch 41 are assembled is located in the mounting tube 43, while the part for squeezing the first soft glue 50 is located outside the mounting tube 43. The part on the moving part 42 for squeezing the first soft glue 50 includes a disc-shaped squeezing end 51. A hollow first connecting column 52 is provided in the squeezing end 51. The first connecting column 52 passes through the first soft glue 50 and is connected to the first fixing component, and the squeezing end 51 is in contact with the first soft glue 50; a first mounting groove 53 is provided on the lumbar support component 15, and the first soft glue 50 is provided in the first mounting groove 53. Part of the moving part 42 passes through the first soft glue 50 and is in contact with the first fixing component. The first fixing assembly is connected to the part that passes through the first mounting groove 53. Specifically, the first fixing assembly includes a first connecting screw 54 and a first gasket 55. The first connecting screw 54 passes through the first gasket 55 and the first mounting groove 53 and is screwed into the first connecting column 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 tube 43, one end of the spring 47 abuts the end of the blind hole of the mounting tube 43, and the other end abuts the end of the movable member 42. The cross-section of the part of the movable member 42 located in the mounting tube 43 is arc-shaped, and the three-dimensional shape is formed by a plane and a curved surface. A spring 47 is provided axially on the plane to contact the upper surface of the gear switch 41. The tooth surface 87 of the meshing teeth is meshed with each other, and by rotating the gear switch 41, the meshing teeth on the positioning meshing portion 86 are engaged with or disengaged from the tooth surface 87 on the moving member 42 under eccentric motion to lock or unlock the moving member and keep it in the desired position, thereby fixing the position of the lumbar support component 15; since the first soft rubber 50 is provided on the first connecting member 17 and the lumbar support component 15, when the user adjusts his posture and moves his back while leaning on the seat, the lumbar support component 15 can swing accordingly with the constantly changing force applied by the user during the movement, so that the lumbar support component 15 can better fit the human waist, provide better support effect, and be more comfortable to use.The fourth embodiment differs from the third embodiment in that the positions of the mounting tube 43 and the first mounting slot 53 are interchanged. Specifically, the mounting tube 43 is located on the lumbar support assembly 15, while the first mounting slot 53 is located on the first connector 17. The remaining structure is similar to that of the third embodiment and will not be further described here. The third embodiment is simpler in structure, more convenient in operation, and more practical.

[0047] In this embodiment, the first connecting member 17 includes a first connecting end 36 and a second connecting end 37. The first connecting end 36 and the second connecting end 37 are respectively arranged on both sides of the lumbar support component 15 and are connected thereto; the first fine-adjustment component 40 is arranged between the first connecting end 36 and the lumbar support component 15 and / or between the second connecting end 37 and the lumbar support component 15. Specifically, a first fine-motion adjustment component 40 can be provided between the first connection end 36 and the lumbar support component 15 or between the second connection end 37 and the lumbar support component 15, or a first fine-motion adjustment component 40 can be provided between the first connection end 36 and the lumbar support component 15 and between the second connection end 37 and the lumbar support component 15 at the same time; by connecting the first connection end 36 and the second connection end 37 on the first connecting member 17 to both sides of the lumbar support component 15 and providing the first fine-motion adjustment component 40 at the connection point, not only can the distance of the lumbar support component 15 relative to the human waist be adjusted, but also when the user's waist and back move, the lumbar support component 15 can generate corresponding slight swing to adapt to the user's waist and back position after the posture is adjusted, so that the waist and back support component fits the user's waist and back better, and the user feels more comfortable.

[0048] In a preferred embodiment, the connection points between the first connection end 36 and the second connection end 37 and the lumbar support assembly 15 are located on the horizontal center line of the lumbar support assembly 15; this allows the lumbar support assembly 15 to better swing slightly with the movement of the user's waist and back, thereby better fitting the user's waist, providing greater comfort and better support for the waist.

[0049] In a preferred embodiment, the first connector 17 further includes a third connecting end 38 and a fourth connecting end 39, which are disposed on opposite sides of the back support assembly 16 and are movably connected to the back support assembly 16. Specifically, the connection points of the third connecting end 38 and the fourth connecting end 39 to the back support assembly 16 are located on the horizontal centerline of the back support assembly 16. This allows the back support assembly 16 to oscillate slightly with the movement of the user's waist and back, thereby better fitting the user's back, providing greater comfort and providing better back support.

[0050] In the preferred embodiment, see Figure 8-9, a second fine-motion adjustment component is provided between the third connection end 38 and the back support component 16 and / or between the fourth connection end 39 and the back support component 16. It can be understood that the second fine-motion adjustment component is provided between the third connection end 38 and the back support component 16 or between the fourth connection end 39 and the back support component 16, and can also be provided between the third connection end 38 and the back support component 16 and between the fourth connection end 39 and the back support component 16 at the same time; the second fine-motion adjustment component includes a second soft glue 56 and a second fixing component. The second soft glue 56 is provided between the connection component and the back support component 16. A part of the connection component passes through the second soft glue 56 and is connected to the part of the second fixing component that passes through the back support component 16. Specifically, the second soft glue 56 is provided between the third connection end 38 and the back support component 16 and between the fourth connection end 39 and the back support component 16, a part of the connecting component passes through the second soft glue 56 and is connected to the part of the second fixing component that passes through the back support component 16, that is, a second connecting column 57 is respectively provided at the third connecting end 38 and the fourth connecting end 39 of the connecting component, and the second fixing component includes a second connecting screw 58 and a second gasket. The second connecting screw 58 in the second fixing component passes through the second gasket and the back support component 16 and is then screwed into the second connecting column 57 to connect the first connecting component 17 to the back support component 16 and clamp the second soft glue 56 between the first connecting component 17 and the back support component 16; alternatively, the second connecting column 57 can be set on the back support component 16, and the second connecting screw 58 of the second fixing component passes through the second gasket and the first connecting component 17 in the connecting component and is screwed into the corresponding second connecting column 57 on the back support component 16. By providing the second soft rubber 56, when the user adjusts their posture and moves their back while leaning on the chair, the back support assembly 16 can slightly oscillate in response to the changing forces applied by the user during movement, thereby better conforming to the user's back, providing better support and greater comfort. The first micro-adjustment assembly 40, the second micro-adjustment assembly, and the connecting assembly work together to achieve micro-movement of the entire back support assembly in response to the user's back movements, constantly conforming to the user's back, providing better support and greater comfort. The connecting component includes a first connecting member 17, and the third connecting end 38 and the fourth connecting end 39 are both arranged on the first connecting member 17. Since the first connecting member 17 is also connected to the lumbar support component 15, after the distance of the lumbar support component 15 relative to the user's waist is adjusted by the first fine-adjustment component 40, the back support component 16 can be driven by the first connecting member 17 to move in the same direction, so that the back support component 16 can adaptively adjust the distance relative to the user's back, thereby realizing the synchronous movement of the lumbar support component 15 and the back support component 16, providing the user with better support effect on the waist and back, and better comfort.

[0051] In this embodiment, see Figure 10 The lumbar and back support assembly also includes a second connecting member 18. A lifting and adjusting assembly 14 is provided between the first connecting member 17 and the second connecting member 18. The lifting and adjusting assembly 14 enables the first connecting member 17 and the second connecting member 18 to move relative to each other, so that the lumbar support assembly 15 and the back support assembly 16 can be lifted and lowered. The second connecting member 18 is connected to the base 2 or the seat cushion assembly. The lifting and adjusting assembly 14 causes the lumbar support assembly 15 and the back support assembly 16 to be lifted and lowered synchronously relative to the seat cushion assembly or the base 2, so that the height of the lumbar support assembly 15 and the back support assembly 16 can be adjusted according to the height of the user, so that the lumbar support assembly 15 and the back support assembly 16 provide better support for the user. There is at least one set of lifting and adjusting assemblies 14. When there is only one set, the lifting and adjusting assembly 14 can be provided between the middle of the first connecting member 17 and the middle of the second connecting member 18, or two sets can be used, symmetrically provided on the first connecting member 17, and also located between the first connecting member 17 and the second connecting member 18. Specifically, in this embodiment, see Figure 7The lifting and lowering adjustment assembly 14 includes a fixing member 19, a fixing seat 20, an elastic member 21 and a gear member 22; the fixing member 19 is connected to the first connecting member 17, the fixing seat 20 is connected to the second connecting member 18, the gear member 22 is rotatably connected to the fixing seat 20, the fixing member 19 is sleeved on the periphery of the fixing seat 20 and can slide relative to it, a gear rack 23 is provided on one inner side wall of the fixing member 19, and a locking tooth 24 is provided on one side wall of the gear member 22. The engaging teeth 24 are engaged with the gear rack 23 on the fixing member 19. The elastic member 21 is provided between the gear member 22 and the fixing seat 20. The elastic member 21 causes the engaging teeth 24 on the gear member 22 to engage with the gear rack 23 on the fixing member 19. The user can drive the first connecting member 17 to move up and down by moving the lumbar support assembly 15 up and down, thereby overcoming the elastic force of the elastic member 21, thereby driving the fixing member 19 to move back and forth in its length direction relative to the fixing seat 20, and The preload force generated by the elastic member 21 causes the shift member 22 to always have a tendency to move toward the shift rack 23. When the engaging tooth 24 corresponds to any tooth groove on the shift rack 23, the shift member 22 moves toward the shift rack 23 on the fixed member 19 under the action of the elastic member 21, and the engaging tooth 24 engages with the shift rack 23 to locate the position of the fixed member 19. By moving the lumbar support assembly 15 up and down, when it is necessary to unlock the shift member 22, it is only necessary to do so by Moving the lumbar support assembly 15 forces the shift rack 23 in the fixing member 19 to squeeze the engaging teeth 24 on the shift member 22, forcing it to rotate in a direction away from the shift rack 23 and disengage from the shift rack 23. At the same time, the elastic member 21 is compressed. When the fixing member 19 moves up and down until the next tooth groove on the shift rack 23 is opposite to the engaging teeth 24, the engaging teeth 24 are again engaged with the shift rack 23 under the action of the elastic member 21, so that the lumbar support assembly 15 is stabilized at this height.

[0052] In the preferred embodiment, see Figures 13-1 to 13-3A first limiting wall 25 is provided in the fixing seat 20, and first strip holes 26 are respectively provided on the two opposite side walls of the fixing seat 20. The lifting adjustment component 14 also includes a first rotating shaft 27. The gear member 22 is sleeved on the first rotating shaft 27. The two ends of the first rotating shaft 27 are respectively extended into the first strip holes 26 at the corresponding ends, and the first rotating shaft 27 can be reciprocated in the first strip holes 26 under the action of the fixing member 19. In the first state, the first rotating shaft 27 is located at the first end 31 below the first strip hole 26. When the gear member 22 is disengaged from the first limiting wall 25, the engaging teeth 24 on the gear member 22 are engaged with the gear rack 23 on the fixing member 19 under the action of the elastic member 21, and the lumbar support assembly 15 is in a state where the height can be adjusted; in the second state, the first rotating shaft 27 is located at the second end 32 above the first bar-shaped hole 26, and the gear member 22 contacts the first limiting wall 25 to limit the engaging teeth 24 on the gear member 22 from engaging with the gear rack 23 on the fixing member 19, and the lumbar 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 side 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 for the third protrusion 29 of the gear member 22 to pass through is provided on the fixing seat 20. The third protrusion 29 on the gear member 22 passes through the first through hole 30 on the fixing seat 20 and then extends into the first groove 28 on the fixing member 19. Each tooth groove on the gear rack 23 corresponds to a height gear. When the lumbar support assembly 15 is located at one of the height gears, if the user needs to raise the lumbar support assembly 15, in this state, the gear member 22 is disengaged from the first limiting wall 25, and under the action of the elastic member 21, the engaging teeth 24 on the gear member 22 are engaged with the gear rack 23, and the first rotating shaft 27 is located at the first gear. At the lower end (also referred to as the "first end 31") of the shaped hole 26, the third protrusion 29 retracts into the fixing seat 20 and disengages from the first groove 28 on the fixing member 19. By pulling the lumbar support assembly 15 upward, the lumbar support assembly 15 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, forcing the engaging teeth 24 on the gear member 22 to disengage from the tooth groove on the gear rack 23, while compressing the elastic member 21. After the fixing member 19 moves to a suitable height along with the lumbar support assembly 15, 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 thereto are engaged, thereby fixing the height of the lumbar support assembly 15.If the user needs to lower the lumbar support assembly 15, the user needs to first return the lumbar support assembly 15 to the lowest position (also called the lowest gear), and then adjust it to the desired height according to the above operation. Specifically, the lumbar support assembly 15 is continuously pulled up to make the first groove 28 on the fixing member 19 continuously rise. When the lumbar support assembly 15 rises to the highest position, the gear member 22 is acted upon by the teeth in the gear rack 23, causing the engaging teeth 24 on the gear member 22 to continuously keep away from the gear rack 23. At this time, the third protrusion 29 on the gear member 22 passes through the first through hole 30 on the fixing seat 20 and extends into the first groove 28 until the first end wall 66 located below the first groove 28 contacts the third protrusion 29, and drives the gear member 22 to move upward, so that the first rotating shaft 27 moves to the upper end (also called "second end 32") in the first strip hole 26. At this time, the gear member 22 contacts the first limiting wall 25, and the first limiting wall 25 limits the gear member 22 from being moved in the elastic member. 21, so that the engaging teeth 24 on the shift member 22 and the gear rack 23 on the fixing member 19 are always kept in a disengaged state. In this state, the lumbar support assembly 15 can fall back to the lowest position. At this time, the second end wall 67 located above the first groove 28 on the fixing member 19 contacts the third protrusion 29 of the shift member 22. Then, to raise the lumbar support assembly 15 from the lowest position, it is necessary to push the lumbar support assembly 15 downward first so that the first groove 28 on the fixing member 19 The second end wall of the gear member 22 presses down the third protrusion 29 on the gear member 22, causing the gear member 22 and the first rotating shaft 27 to move downward to the first end 31 of the first strip-shaped hole 26. At this time, the gear member 22 is disengaged from the first limiting wall 25. Since the gear member 22 is no longer restricted by the first limiting wall 25, the elastic member 21 can cause the engaging teeth 24 on the gear member 22 to engage with the tooth groove corresponding to the first gear 33 of the gear rack 23 on the fixing member 19. At this time, the lumbar support assembly 15 can be adjusted normally. In addition, in this embodiment, the teeth on the shift rack 23 have a first side wall 34 and a second side wall 35. The first side wall 34 is flat and can contact the upper surface of the engaging teeth 24 on the shift member 22, preventing the fixing member 19 from sliding along with the lumbar support assembly 15 and failing to effectively fix the height of the lumbar support assembly 15. The second side wall 35 is inclined and can contact the lower surface (which is an inclined surface) of the engaging teeth 24 on the shift member 22. When the lumbar support assembly 15 is lifted upward, the shift rack 23 facilitates pushing the shift member 22 to rotate about the first rotation axis 27.

[0053] The present invention also provides a specific embodiment of a seat, see Figure 1-18The seat comprises a seat cushion assembly and armrest assemblies 38 disposed on both sides of the seat cushion assembly. The seat also includes the aforementioned lumbar support assembly. The seat cushion assembly comprises a seat cushion frame 1, which comprises a first portion 4 and a second portion 5. The first portion 4 and the second portion 5 are connected, and in the support direction, the first portion 4 is located above the second portion 5. The first portion 4 and the second portion 5 are at least partially separated. It can be understood that the first portion 4 and the second portion 5 can be partially connected and partially separated, or the first portion 4 and the second portion 5 can be completely separated and connected by an elastic support structure. When the first portion 4 is subjected to force, the first portion 4 can elastically move relative to the second portion 5. The user is supported by the seat cushion frame 1, with the first portion 4 located on one side of the user, directly supporting the buttocks and legs. When the first portion 4 of the seat cushion frame 1 is subjected to force, it can elastically move relative to the second portion 5. Therefore, as the user adjusts their sitting posture, the first portion 4 can adaptively adjust the support effect on the user's buttocks in real time as the position and magnitude of the force applied by the user's buttocks on the first portion 4 change, under the action of the elastic force, thereby enhancing user comfort. A base 2 is provided beneath the seat cushion assembly. The base 2 is used to mount and support the seat cushion assembly and the lumbar support assembly, and the base 2 can be configured to move with rollers 3. Each armrest assembly 68 can be connected to the seat cushion assembly or to the base 2. The armrest assembly 68 can be a fixed structure, meaning it cannot be adjusted in position or angle. However, to enhance seat comfort, the armrest assembly 68 can be configured to be adjustable in position or angle. The armrest assembly 68 in the present invention can utilize existing technology to support the user's arms, enhancing user comfort.

[0054] In the preferred embodiment, see Figure 2-4The first portion 4 and the second portion 5 are partially connected and partially separated, so that the first portion 4 is suspended relative to the second portion 5 at the separation point. The seat cushion frame 1 is made of metal or plastic. In this embodiment, a cushion or mesh is provided on the first portion 4, which contacts the human buttocks through the cushion or mesh. The second portion 5 is connected to the base 2. When a person sits on the cushioned or meshed first portion 4, the first portion 4 can elastically move relative to the second portion 5. As the person adjusts their sitting posture, the first portion 4 can cause the cushion or mesh to adjust its support for the person in real time, improving sitting comfort and reducing fatigue. In this structure where the first portion 4 and the second portion 5 are partially connected and partially separated, so that the first portion 4 is suspended relative to the second portion 5 at the separation point, the metal or plastic material of the seat cushion frame 1 can enhance the elastic movement between the first portion 4 and the second portion 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 adopted, which can further enhance the effect of elastic activity. 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, the first part 4 and the second part 5 are both square, and the sides of the two parts are connected away from the waist and back support component, and the other three sides are separated, so that the first part 4 forms an open state relative to the second part 5. When the cushion frame 1 is made of metal or plastic, combined with this open state structure, the elastic activity effect of the first part 4 relative to the second part 5 can be better enhanced, thereby improving the user's comfort.

[0055] In the preferred embodiment, see Figure 2 The position where the first part 4 and the second part 5 are separated forms an installation area 6, and an elastic support structure is provided in the installation area 6. Specifically, the elastic support structure is provided in the installation area 6 and is clamped between the first part 4 and the second part 5. The elastic support structure provides elastic supporting force to the first part 4, thereby further improving the elastic activity effect of the first part 4 relative to the second part 5 and improving the user's comfort.

[0056] In the preferred embodiment, the elastic support structure has multiple implementation modes. The present utility model provides the following specific implementation modes. The first implementation mode: See Figure 1-4The elastic supporting structure includes two elastic supporting rings 7 and an elastic connecting portion 8. The elastic supporting ring 7 is annular. The two elastic supporting 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 supporting structure is installed in the installation area 6, the two elastic supporting rings 7 and the elastic connecting portion 8 are clamped between the first part 4 and the second part 5. The elastic supporting ring 7 and the elastic connecting portion 8 are an integrated structure and are made of materials with good elasticity such as silicone and rubber. By adopting the elastic supporting structure of the aforementioned structure, the annular elastic supporting ring 7 is located on both sides of the seat cushion assembly, that is, on both sides of the user's buttocks and legs, which can enhance the amplitude of the elastic activity of the first part 4, provide the user with a better elastic supporting effect, better fit the shape of the human buttocks, and make the sitting posture more comfortable; in addition, see Figure 3-4 , a first assembly groove 9 is provided on the first part 4, and a second assembly groove 10 is provided on the second part 5. The first protrusion 11 and the second protrusion 12 can be provided on the two elastic support rings 7 and the elastic connecting portion 8 at the same time, or the first protrusion 11 and the second protrusion 12 can be provided on only one or two of the two elastic support rings 7 and the elastic connecting portion 8, so 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 provided on the two elastic support rings 7 and the elastic connecting portion 8 at the same time, the first protrusion 11 on the two elastic support rings 7 and the elastic connecting portion 8 are sequentially connected to form a continuous first ridge, and the second protrusions 12 on the two elastic support rings 7 and the elastic connecting portion 8 are sequentially connected A continuous second ridge is formed, the first ridge is inserted as a whole into the first assembly groove 9 on the first part 4, and the second ridge is inserted as a whole into the second assembly groove 10 on the second part 5, so that the elastic support structure is firmly installed between the first part 4 and the second part 5; in addition, the two sides of the first part 4 are in an upward inclined state 13, and a part of the installation area 6 is located between the inclined part of the first part 4 and the second part 5, so that a part of the installation area 6 is in an inclined state. Specifically, the part of the installation area 6 for installing the elastic support ring 7 is located between the inclined part of the first part 4 and the second part 5, so that the elastic support ring 7 is in an inclined state from bottom to top and from inside to outside. Through this structure, the user's buttocks and thighs can avoid the edge of the cushion frame 1, avoiding the user's uncomfortable experience.

[0057] The second embodiment of the elastic support structure: see Figure 5The elastic support structure may include multiple springs, and the multiple springs are arranged at intervals in the installation area 6 and are clamped between the first part 4 and the second part 5. The positioning connection between the springs can be achieved by respectively providing assembly grooves on the first part 4 and the second part 5, so that one end of the spring is connected to the assembly groove on the first part 4, and the other end is connected to the assembly groove on the second part 5, and the two sides of the first part 4 are also in an upward inclined state. Part of the installation area 6 is located between the inclined part of the first part 4 and the second part 5, so that part of the installation area 6 is in an inclined state. Specifically, the part of the installation area 6 for installing some springs is located between the inclined part of the first part 4 and the second part 5, so that the part of the spring is in an inclined state from bottom to top and from inside to outside.

[0058] The third embodiment of the elastic support structure: see Figure 6 The elastic support structure may include a plurality of spring sheets, which are arranged at intervals in the installation area 6 and are clamped between the first part 4 and the second part 5. The positioning connection between the spring sheet and the second part 5 can be achieved by connecting one end of the spring sheet 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 assembly groove on the first part 4 and the other end is connected to the assembly groove on the second part 5. The two sides of the first part 4 are also in an upward inclined state. Part of the installation area 6 is located between the inclined portion of the first part 4 and the second part 5, so that part of the installation area 6 is in an inclined state. Specifically, the portion of the installation area 6 for installing part of the spring is located between the inclined portion of the first part 4 and the second part 5, so that the part of the spring is in an inclined state from bottom to top and from inside to outside.

[0059] In the preferred embodiment, see Figure 9 and 18The seat also includes a headrest assembly 59, which is located above the lumbar support assembly. The headrest assembly 59 is connected to the third connecting member 60, and the third connecting member 60 is relatively rotatably connected to the second connecting member 18. The second connecting member 18 is connected to the base 2, and the second connecting member 18 is also connected to the first connecting member 17; the third connecting member 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 connecting member 18, the sixth connecting end 62 and the seventh connecting end 63 are respectively arranged 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 connecting member 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, so that the headrest assembly 59 can better swing slightly with the movement of the user's head and neck, thereby better fitting the back of the user's head and neck, providing better comfort and better support for the head and neck.

[0060] In a preferred embodiment, a third fine-motion adjustment component is provided between the sixth connection end 62 of the third connection member 60 and the headrest assembly 59 and between the seventh connection end 63 of the third connection member 60 and the headrest assembly 59; the structure of the third fine-motion adjustment component adopted in at least one of the sixth connection end 62 of the third connection member 60 and the headrest assembly 59 and between the seventh connection end 63 of the third connection member 60 and the headrest assembly 59 is as follows: the third fine-motion adjustment component includes a third soft glue 64 and a third fixing component, the third soft glue 64 is provided between the third connection member 60 and the headrest assembly 59, a part of the third connection member 60 passes through the third soft glue 64 and is connected to the part of the third fixing component that passes through the headrest assembly 59, the third connection member 60 is connected to the headrest assembly 59 through the third fixing component, and the third soft glue 64 is clamped between the third connection member 60 and the headrest assembly 59, specifically, the third soft glue 64 is provided in the third connection member Between the sixth connecting end 62 of 60 and the headrest assembly 59 and between the seventh connecting end 63 of the third connecting member 60 and the headrest assembly 59, a portion of the third connecting member 60 passes through the third soft glue 64 and is connected to the portion of the third fixing assembly that passes through the headrest assembly 59, that is, a third connecting column is respectively provided at the sixth connecting end 62 and the seventh connecting end 63 of the third connecting member 60, and the third fixing assembly includes a third connecting screw and a third gasket, and the third connecting screw in the third fixing assembly passes through the third gasket and the third connecting member 60 and is screwed into the interior of the third connecting column to connect the third connecting member 60 to the headrest assembly 59 and clamp the third soft glue 64 between the third connecting member 60 and the headrest assembly 59; alternatively, the third connecting column can be provided on the headrest assembly 59, and the third connecting screw of the third fixing assembly passes through the third gasket and the third connecting member 60 and is screwed into the corresponding third connecting column on the headrest assembly 59. By providing the third soft rubber 64, when the user adjusts their posture and moves their head and neck while leaning on the seat, the headrest assembly 59 can swing accordingly with the constantly changing force applied by the user's head and neck movements, thereby allowing the headrest assembly 59 to better fit the back of the head and neck, providing better support and making it more comfortable to use. Through 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 entire waist and back support assembly and the headrest assembly 59 can produce corresponding micro-movements in accordance with the user's waist and back movements and head and neck movements, thereby constantly fitting the user's waist and back and head and neck, providing better support and greater comfort.

[0061] In addition, in this embodiment, see Figure 1 and Figure 8A sacrum support assembly 65 is provided below the waist and back support assembly. The sacrum support assembly 65 is used to support the user's sacrum position. The sacrum support assembly 65 can be connected to the waist and back support assembly, or to the seat cushion assembly or the base 2. Specifically, the sacrum support assembly 65 is provided below the waist support assembly 15 of the waist and back support assembly. A mounting groove that matches the shape of the sacrum support assembly 65 is provided at the bottom of the waist support assembly 15, and the sacrum support assembly 65 is provided in the mounting groove.

[0062] Furthermore, the headrest assembly 59 , the lumbar support assembly 15 and the back support assembly 16 can adopt existing technology, that is, they are formed by a frame and a cushion or a mesh.

[0063] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A waist and back support assembly, comprising a waist support assembly and a back support assembly, characterized in that: The lumbar support assembly is connected to the back support assembly through a first connecting member, and a first micro-adjustment assembly is provided between the lumbar support assembly and the first connecting member for enabling the lumbar support assembly to reciprocate in the horizontal direction. The first micro-adjustment assembly drives the first connecting member to move, and the first connecting member drives the back support assembly to move; the first micro-adjustment assembly includes a gear switch, a movable member that can move elastically and cooperates with the gear switch, and a first fixed assembly. The gear switch and the movable member are provided on the first connecting member or the lumbar support assembly, and are connected to the movable member through the first fixed assembly to connect the first connecting member and the lumbar support assembly. The movable member is unlocked or locked by adjusting the gear switch, and the movable member is driven to reciprocate in the horizontal direction by squeezing or loosening the lumbar support assembly, and the first connecting member is driven to move at the same time.

2. The back support assembly according to claim 1, characterized in that: A mounting tube is provided on the first connecting member, the gear switch is connected to the mounting tube, the movable member is at least partially located in the mounting tube, a first mounting groove is provided on the lumbar support assembly, a first soft rubber is provided in the first mounting groove, a portion of the movable 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, a spring sleeved on the gear switch is provided in the mounting tube, one end of the spring abuts against an end of the mounting tube, and the other end abuts against an end of the movable member; Alternatively, a mounting tube is provided on the lumbar support assembly, the gear switch is connected to the mounting tube, and the movable member is also at least partially located in the mounting tube. 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 movable member passes through the first soft rubber and is connected to the part of the first fixed assembly that passes through the first mounting groove. A spring is provided in the mounting tube and is sleeved on the gear switch, and one end of the spring abuts against the end of the mounting tube, and the other end abuts against the end of the movable member.

3. The waist and back support assembly according to any one of claims 1-2, characterized in that: The first connecting member includes a first connecting end and a second connecting end, and the first connecting end and the second connecting end are respectively arranged on both sides of the lumbar support component and connected thereto; the first fine-adjustment component is arranged between the first connecting end and the lumbar support component and / or between the second connecting end and the lumbar support component.

4. The back support assembly according to claim 3, characterized in that: The connection points of the first connection end and the second connection end with the lumbar support assembly are located on the horizontal center line of the lumbar support assembly.

5. The waist and back support assembly according to any one of claims 1 to 2 or 4, characterized in that: The first connecting member further includes a third connecting end and a fourth connecting end. The third connecting end and the fourth connecting end are respectively arranged on both sides of the back support assembly and are movably connected to the back support assembly.

6. The back support assembly according to claim 5, characterized in that: The connection points of the third and fourth connection ends with the back support assembly are located on the horizontal center line of the back support assembly; Alternatively, a second fine-motion adjustment component is arranged between the third connecting end and the back support component and / or between the fourth connecting end and the back support component; the second fine-motion adjustment component includes a second soft glue and a second fixing component, the second soft glue is arranged between the connecting component and the back support component, a part of the connecting component passes through the second soft glue and is connected to the part of the second fixing component passing through the back support component, the connecting component is connected to the back support component through the second fixing component, and the second soft glue is clamped between the connecting component and the back support component; or, the second fine-motion adjustment component includes a second soft glue and a second fixing component, the second soft glue is arranged between the connecting component and the back support component, a part of the back support component passes through the second soft glue and is connected to the part of the second fixing component passing through the connecting component, the connecting component is connected to the back support component through the second fixing component, and the second soft glue is clamped between the connecting component and the back support component.

7. The back support assembly according to claim 1, characterized in that: It also includes a second connecting member, and a lifting adjustment component is set between the first connecting member and the second connecting member. The lifting adjustment component enables the first connecting member and the second connecting member to move relative to each other, so that the waist support component and the back support component can be raised and lowered.

8. The back support assembly according to claim 7, characterized in that: The lifting and lowering adjustment assembly includes a fixing member, a fixing seat, an elastic member and a gear member; the fixing member is connected to the first connecting member, the fixing seat is connected to the second connecting member, the gear 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 gear rack is provided on one of the inner side walls of the fixing member, and a locking tooth is provided on one side wall of the gear member, the locking tooth of the gear member is engaged with the gear rack on the fixing member, the elastic member is provided between the gear member and the fixing seat, and the locking tooth on the gear member is caused to engage with the gear rack on the fixing member through the elastic member, and the fixing member can be driven to move back and forth relative to the length direction of the fixing seat by moving the first connecting member, and the gear member is caused to position the position of the fixing member through the elastic member.

9. The back support assembly according to claim 8, characterized in that: A first limiting wall is provided in the fixing seat, and first strip-shaped holes are respectively provided on two opposite side walls of the fixing seat. The lifting and lowering adjustment assembly further includes a first rotating shaft. The shift member is sleeved on the first rotating shaft. Both ends of the first rotating shaft extend into the first strip-shaped holes at the corresponding ends, and the first rotating shaft can be reciprocated in the first strip-shaped holes under the action of the fixing member. In the first state, the first rotating shaft is located at the first end below the first strip hole, the shift member is disengaged from the first limiting wall, and under the action of the elastic member, the engaging teeth on the shift member are engaged with the shift rack on the fixing member, and the lumbar 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 bar-shaped hole, and the shift member contacts the first limiting wall to limit the engagement of the engaging teeth on the shift member with the shift rack on the fixing member, and the lumbar support assembly is in a state where it can fall back to the lowest gear.

10. A chair comprising a seat cushion assembly and armrest assemblies arranged on both sides of the seat cushion assembly, characterized in that: The seat further comprises a waist and back support assembly as described in any one of claims 1-9.

Images