Seat

Abstract

The seat comprises a seat assembly, a backrest assembly and a sacrum supporting structure, the backrest assembly comprises a waist supporting piece, the sacrum supporting structure is located below the waist supporting piece, and the front end face of the sacrum supporting structure protrudes out of the waist supporting piece. Compared with the prior art, the seat is provided with the sacrum supporting structure, the sacrum of a user can be effectively supported, the use experience of the user is improved, and discomfort is reduced.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a chair. Background Art

[0002] Chairs are commonplace items in our daily lives, used in a wide variety of situations. People often sit for long periods of time, whether at work or for entertainment. While pursuing comfort, users are also increasingly concerned about the impact of chairs on their health.

[0003] The sacrum of the human body is located in the middle of the waist. The structure of existing seats with lumbar support function cannot provide good support for the sacrum, which can easily cause discomfort to users after sitting for a long time.

[0004] Therefore, based on the above problems, it is necessary to improve the existing seats. Utility Model Content

[0005] In response to the problems existing in the above-mentioned prior art, the utility model effectively supports the user's sacrum, improves the user's usage experience, and reduces discomfort.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] A chair is characterized by comprising: a seat assembly, a backrest assembly and a sacrum support structure, wherein the backrest assembly includes a lumbar support component, the sacrum support structure is located below the lumbar support component, and the front end surface of the sacrum support structure protrudes from the lumbar support component.

[0008] Preferably, the sacrum support structure is connected to the seat assembly or the backrest assembly via a mounting member, and the mounting member is elastic;

[0009] When force is applied to the sacrum support structure, the mounting member drives the sacrum support structure to move along the force application direction.

[0010] Preferably, a recessed portion is formed at the bottom of the lumbar support member, and both sides of the lumbar support member are bent respectively. The sacrum support structure is located in the recessed portion and is connected to the lumbar support member via the mounting member.

[0011] Preferably, the sacrum support structure is roughly triangular in shape, and the top of the sacrum support structure is raised to support the sacrum.

[0012] Preferably, the backrest assembly includes a first connecting member and a second connecting member connected to the first connecting member, and at least one lifting assembly is provided between the first connecting member and the second connecting member to enable the first connecting member to move relative to the second connecting member.

[0013] Preferably, the lifting assembly includes a fixing member, a fixing seat, an elastic member and a gear 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.

[0014] Preferably, a first limiting wall is provided in the fixing seat and first strip holes are respectively provided on the two opposite side walls of the fixing seat. The lifting assembly also includes a first rotating shaft. The gear member is sleeved on the first rotating shaft. The two ends of the first rotating shaft respectively 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.

[0015] Preferably, the backrest assembly further comprises a back support member, which is connected to the lumbar support member via the first connecting member, and a gap is provided between the back support member and the lumbar support member; the first connecting member comprises 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 arranged on both sides of the lumbar support member and connected thereto, and the third connecting end and the fourth connecting end are respectively arranged on both sides of the back support member and connected thereto.

[0016] Preferably, a first fine-motion adjustment component is provided between the first connecting end and the lumbar support member and / or between the second connecting end and the lumbar support member.

[0017] A second fine-motion adjustment component is provided between the third connection end and the back support member and / or between the fourth connection end and the back support member.

[0018] It also includes a headrest assembly, which is located above the backrest assembly. The headrest assembly is connected to a third connecting member, and the third connecting member includes a fifth connecting end, a sixth connecting end, and a seventh connecting end. A third fine-adjustment assembly is provided between the sixth connecting end and the headrest assembly and / or between the seventh connecting end and the headrest assembly.

[0019] Preferably, the seat assembly includes a base, and the sacral support structure is connected to the base via the mounting member.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] It effectively supports the user's sacrum, improves the user experience and reduces discomfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the sacral support structure.

[0023] Figure 2 A schematic diagram of the seat structure.

[0024] Figure 3 This is a structural diagram of the seat from the other direction.

[0025] Figure 4 This is an exploded diagram of the backrest assembly.

[0026] Figure 5 It is a structural diagram of the lifting component.

[0027] Figure 6 The figure is an exploded diagram of the lifting assembly.

[0028] Figure 7 This is a schematic diagram of the exploded view of the lifting assembly from another direction.

[0029] Figure 8 Cross-sectional views of the lifting assembly in various states.

[0030] Figure 9 It is a structural diagram of the backrest assembly.

[0031] Figure 10 and Figure 11 Schematic diagram of the backrest assembly in different directions.

[0032] Figure 12 Schematic diagram of the structure of the first micro-adjustment component.

[0033] Figure 13 and Figure 14 Schematic diagram of the decomposition of the first micro-adjustment component in different directions.

[0034] Figure 15 It is a cross-sectional view of the first fine-motion adjustment component.

[0035] Figure 16 for Figure 10 A partial enlarged view of part A.

[0036] Figure 17 This is a structural diagram of another embodiment of the first fine-motion adjustment component.

[0037] Figure 18 for Figure 17 Schematic diagram of the exploded view of the first micro-adjustment component. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-18, the specific implementation methods of the utility model are further described in detail to make the technical solution of the utility model easier to understand and grasp.

[0039] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "end", "front", "back", "middle", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be through bolt fixing or pin fixing, welding or pin shaft connection, etc. commonly used in the prior art, and therefore, it is not described in detail in this embodiment.

[0041] like Figure 1-3 As shown, a chair includes: a seat assembly 200, a backrest assembly 100 and a sacrum support structure 4, the sacrum support structure 4 is connected to the seat assembly 200 or the backrest assembly 100 through a mounting member 5, and the mounting member 5 is elastic. When force is applied to the sacrum support structure 4, the mounting member 5 drives the sacrum support structure 4 to move along the direction of the force; the mounting member 5 of the present application can be a manganese sheet. By setting the mounting member 5 to have a certain elasticity, when the user's sacrum moves, the sacrum support structure 4 produces a corresponding slight movement to adapt to the position of the user's sacrum after adjusting the posture, so that the sacrum support structure 4 fits the user's sacrum more closely, thereby improving the user experience and reducing discomfort during use.

[0042] like Figure 4 As shown, the seat assembly 200 includes a base 2, and the backrest assembly 100 includes a back support 16, a lumbar support 15, a first connecting member 17, and a second connecting member 18 connected to the first connecting member 17. The sacrum support structure 4 is located below the lumbar support 15, and the front end surface of the sacrum support structure 4 protrudes from the lumbar support 15. The back support 16 and the lumbar support 15 are respectively connected to the first connecting member 17, and there is a gap between the back support 16 and the lumbar support 15 to prevent the back support 16 and the lumbar support 15 from being damaged by collision and friction when the user leans back.

[0043] A recessed portion 151 is formed at the bottom of the lumbar support member 15, and the sacral support structure 4 is located in the recessed portion 151. Without reducing the length and width of the lumbar support member 15 that wraps around the waist, the sacral support structure 4 is better aligned with the user's sacrum, and the top 41 of the sacral support structure 4 is raised to support the sacrum. Specifically, the top side of the sacral support structure 4 gradually rises forward toward the middle. Since the sacrum is concave forward as a whole, the present application can better support the user's sacrum by setting the sacral support structure 4 to have a good supporting effect and improve the user's comfort when using it.

[0044] Because the sacrum is generally concave forward, existing seats do not have a sacrum support structure. Users may place a pillow between the seat back and the seat cushion as a sacrum support. This will cause a problem: the pillow will shift as the user adjusts their sitting posture and cannot provide good support for the sacrum. Moreover, the pillow is in front of the backrest. If the user wants to put the entire upper limb close to the seat back, the pillow will press against the sacrum and waist, and the user will need to bend the back further to put it close to the back. This is not ergonomic and may cause discomfort. In addition, it is possible that although the back and waist are close to the seat back, the sacrum is not supported. Therefore, the present application provides a sacrum support structure 4, which is detachably fixed to the lumbar support member 15 by a mounting member 5. Not only does the sacrum support structure 4 not shift, but the user does not need to bend the upper limbs significantly, so that the sacrum support structure 4 can well support the user's sacrum, and the back and waist can fit well with the back support member 16 and the lumbar support member 15, reducing discomfort during use.

[0045] The two sides of the waist support member 15 are respectively bent, and the bending can make the waist support member 15 better fit the user's waist, thereby improving the user's comfort when using it.

[0046] The sacrum support structure 4 is roughly triangular in shape. Since the sacrum is composed of five sacral vertebrae and its shape is roughly triangular, the present application arranges the sacrum support structure 4 into a roughly triangular shape, which can cover the user's sacrum and provide good support for the user's sacrum.

[0047] In this embodiment, the sacral support structure 4 is connected to the backrest assembly 100 via the mounting member 5. Specifically, the sacral support structure 4 can be connected to the lumbar support member 15 via the mounting member 5. In other embodiments, the sacral support structure 4 can be connected to the seat assembly 200 via the mounting member 5. Specifically, the sacral support structure 4 can be connected to the base 2 via the mounting member 5.

[0048] like Figure 5-8As shown, at least one lifting assembly 14 is provided between the first connecting member 17 and the second connecting member 18 to enable the first connecting member 17 to move relative to the second connecting member 18. In this embodiment, two lifting assemblies 14 are provided, one on each side of the first connecting member 17 and the other on each side of the second connecting member 18. The provision of the lifting assemblies 14 allows the height of the backrest assembly 100 to be adjusted according to the user's height, enabling the backrest assembly 100 to provide better support for the user. In this embodiment, the lumbar support member 15 and the back support member 16 of the backrest assembly 100 are independently formed and connected by the first connecting member 17. Specifically, the lifting assembly 14 is provided between the first connecting member 17 and the second connecting member 18, which is connected to the base 2. The lifting assembly 14 causes the first connecting member 17 to drive the back support member 16 and the lumbar support member 15 to rise and fall synchronously.

[0049] The lifting assembly 14 includes a fixing member 19, a fixing seat 20, an elastic member 21 and a gear member 22. 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. The sliding direction is to slide in the direction of the seat height. 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 locking tooth 24 of the gear member 22 is 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 locking tooth 24 on the gear member 22 is forced to engage with the gear rack 23 on the fixing member 19 through the elastic member 21. The user can overcome the elastic force of the elastic member 21 by moving the first connecting member 17 up and down, thereby driving the fixing member 19 to move back and forth in its length direction relative to the fixing seat 20, and the elastic member 21 produces The generated pre-tightening force 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 in the shift rack 23 to locate the position of the fixed member 19; when it is necessary to unlock the shift member 22, the first connecting member 17 is moved to force the shift rack 23 in the fixed member 19 to squeeze the engaging tooth 24 on the shift member 22, forcing it to rotate in the direction away from the shift rack 23 and disengage from the shift rack 23, while the elastic member 21 is compressed. When the fixed member 19 moves up and down so that the next tooth groove on the shift rack 23 is opposite to the engaging tooth 24, the engaging tooth 24 again engages with the shift rack 23 under the action of the elastic member 21, so that the backrest assembly is stable at this height.

[0050] A first limiting wall 25 is provided within the fixing base 20, and first strip-shaped holes 26 are respectively provided on two opposite side walls of the fixing base 20. The lifting assembly 14 also includes a first rotating shaft 27. The shift member 22 is sleeved on the first rotating shaft 27. The two ends of the first rotating shaft 27 extend into the first strip-shaped holes 26 at the corresponding ends. The first rotating shaft 27 can be reciprocated in the first strip-shaped holes 26 under the action of the fixing member 19.

[0051] In the first state, the first rotating shaft 27 is located at the first end 281 below the first strip hole 26, the shift 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 shift member 22 are engaged with the shift rack 23 on the fixing member 19, and the lumbar support member 15 is in an adjustable height state.

[0052] In the second state, the first rotating shaft 27 is located at the second end 282 above the first bar-shaped hole 26, and the shift member 22 contacts the first limiting wall 25 to limit the engagement of the engaging teeth 24 on the shift member 22 with the shift rack 23 on the fixing member 19, and the lumbar support member 15 is in a state where it can fall back to the lowest gear.

[0053] 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 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 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 backrest assembly is at one of the height gears, when it is at one of the height gears, if the user needs to raise the backrest assembly, 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. The first rotating shaft 27 is located at the lower end (also referred to as the "first end 281") in the first strip hole 26, and the third protrusion 29 is retracted into the fixing seat 20, disengaging from the first groove 28 on the fixing member 19. By pulling upward, the first connecting member 17 is driven 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 and the backrest assembly move to a suitable height, the gear member 22 is restored under the elastic action of the elastic member 21 to make the engaging teeth 24 and the tooth groove on the gear rack 23 opposite thereto engage, so as to fix the height of the backrest assembly.When the user needs to lower the seat, the backrest assembly must be returned to the lowest position first, and then the above-mentioned operation is performed to adjust the seat to the desired height. Specifically, the backrest assembly is continuously pulled up (the back support member 16 or the first connecting member 17 can be pulled up) to make the first groove 28 on the fixing member 19 continue to rise. In the process of rising to the highest position, the shift member 22 is acted upon by the teeth in the gear rack 23, prompting the engaging teeth 24 on the shift member 22 to continue to remain in a state of being disengaged from the gear rack 23. At this time, the third protrusion 29 on the shift 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 281 located below the first groove 28 contacts the third protrusion 29, and drives the shift member 22 to move upward, so that the first rotating shaft 27 moves to the upper end (also referred to as the "second end 282") in the first bar hole 26. At this time, the shift member 22 contacts the first limiting wall 25, and the first limiting wall 25 limits the shift member 22 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 back support member 16 and the lumbar support member 15 can fall back to the lowest position. At this time, the second end 282 of the first groove 28 on the fixing member 19, which is located at the upper end, contacts the third protrusion 29 of the shift member 22. Then, to start raising from the lowest position, it is necessary to push the backrest assembly downward first so that the first groove 28 on the fixing member 19 is in contact with the third protrusion 29 of the shift member 22. The second end 282 of the spring member 28 presses down on the third protrusion 29 on the shift member 22, causing the shift member 22 and the first rotating shaft 27 to move downward to the first end 281 of the first strip-shaped hole 26. At this time, the shift member 22 is disengaged from the first limiting wall 25. Since the shift member 22 is no longer restricted by the first limiting wall 25, the elastic member 21 can cause the engaging teeth 24 on the shift member 22 to engage with the tooth groove corresponding to the first gear position 33 in the gear rack 23 on the fixed member 19. At this time, normal height adjustment can be performed. In addition, in this embodiment, see; Figure 9 The teeth on the gear rack 23 have a first side wall 34 and a second side wall 35. The first side wall 34 is planar and can contact the upper surface of the engaging tooth 24 on the gear member 22 to prevent the fixing member 19 from sliding down with the backrest assembly and failing to effectively fix the height of the backrest assembly. The second side wall 35 is an inclined surface and can contact the lower surface (the lower surface is an inclined surface) of the engaging tooth 24 on the gear member 22. When the backrest assembly is lifted upward, the gear rack 23 can push the gear member 22 to rotate around the first rotation axis 27.

[0054] At the same time, due to the provision of a lifting assembly 14, after the user adjusts the seat according to himself, the position of the sacrum support structure 4 may change, and it may not be able to effectively support the user's sacrum. Therefore, the mounting member 5 and the seat of the present application are detachably connected, and the sacrum support structure 4 and the mounting member 5 are also detachably connected, so that the user can adjust the position of the sacrum support structure 4 according to different usage conditions.

[0055] like Figure 9-10 As shown, the backrest assembly includes a back support member 16 and a lumbar support member 15, and the back support member 16 is connected to the lumbar support member 15 through a first connecting member 17; the first connecting member 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 arranged on both sides of the lumbar support member 15 and connected thereto, and the third connecting end 38 and the fourth connecting end 39 are respectively arranged on both sides of the back support member 16 and connected thereto. Specifically, a first micro-connection can be provided between the first connecting end 36 of the first connecting member 17 and the lumbar support member 15 or between the second connecting end 37 of the first connecting member 17 and the lumbar support member 15. The first micro-adjustment component 400 can also be provided between the first connection end 36 of the first connection member 17 and the lumbar support member 15 and between the second connection end 37 of the first connection member 17 and the lumbar support member 15. By connecting the connection ends on the first connection member 17 to both sides of the back support member 16 or to both sides of the lumbar support member 15, and providing the first micro-adjustment component 400 at the connection point, the lumbar support member 15 or the back support member 16 can generate a corresponding slight swing when the user's waist and back move, so as to adapt to the position of the user's waist and back after the posture is adjusted, so that the backrest component can fit the user's waist and back better, and the user comfort is better.

[0056] The connection points of the first connection end 36 and the second connection end 37 with the lumbar support member 15 are located on the horizontal center line of the lumbar support member 15; the connection points of the third connection end 38 and the fourth connection end 39 with the back support member 16 are located on the horizontal center line of the back support member 16, which can enable the lumbar support member 15 or the back support member 16 to swing slightly with the movement of the user's waist and back, thereby better fitting the user's waist and back, improving the comfort of use, and better supporting the waist and back.

[0057] like Figure 12 and Figure 17As shown, the first micro-adjustment component 400 includes a gear switch 40, a movable member 42 that can move elastically with the gear switch 40, and a first fixed component; the gear switch 40 and the movable member 42 are arranged on the first connecting member 17 or the lumbar support member 15, that is, the gear switch 40 and the movable member 42 can be arranged on the first connecting member 17 at the same time, and can also be arranged on the lumbar support member 15 at the same time. The specific implementation shown in this embodiment is 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 member 15. When the gear switch 40 and the movable member 42 are arranged on the first connecting member 17, the first fixed component is arranged on the lumbar support member 15. The movable member 42 is unlocked or locked by adjusting the gear switch 40, and the movable member 42 is driven to reciprocate in the horizontal direction by squeezing or loosening the lumbar support member 15. The first fine-motion adjustment assembly 400 can be used to adjust the lumbar support member 15 to reciprocate in a direction closer to or further away 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 member 15 and the back support member 16 are connected by the first connecting member 17, after the distance of the lumbar support member 15 relative to the user's waist is adjusted by the first fine-motion adjustment assembly 400, the back support member 16 can be driven by the first connecting member 17 to move in the same direction, so that the back support member 16 adaptively adjusts its distance relative to the user's back, thereby achieving synchronous movement of the lumbar support member 15 and the back support member 16, providing better support for the user's waist and back, and enhancing comfort.

[0058] In this embodiment, a plurality of specific implementations of the connection mode of the first fine adjustment component 400 are provided. Figure 12-15, 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 40 is located in the mounting tube 43. Specifically, the gear switch 40 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 of the part, and the spring 47 is sleeved on these convex plates 46, thereby reducing the contact area between the spring 47 and the gear switch 40, avoiding large friction between the gear switch 40 and the elastic when the gear switch 40 rotates. The third connecting part extends into the interior of the moving part 42, and a plurality of first limiting protrusions 48 are arranged at intervals along the axial direction of the third connecting part, and at least one second limiting protrusion 49 is arranged at intervals along the axial direction of the moving part 42, or at least one first limiting protrusion 48 is arranged at intervals along the axial direction of the third connecting part, and the moving part 4 2, multiple second limiting protrusions 49 are provided along the axial direction at intervals on the interior thereof, or multiple first limiting protrusions 48 are provided along the axial direction at intervals on the third connecting portion, and multiple second limiting protrusions 49 are provided along the axial direction at intervals on the interior of the moving member 42, both of which can realize the limiting of the moving member 42 and the gear switch 40. Specifically, when the gear switch 40 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 mutually dislocated in the axial direction and no longer meshed, the gear switch 40 can be squeezed to The lumbar support member 15 is compressed or relaxed, thereby causing the movable member 42 to compress or relax the spring 47. When the lumbar support member 15 is adjusted to a suitable position, the gear switch 40 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 member 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 40 are assembled is located in the mounting tube 43. Figure 13-15As shown, the part for squeezing the first soft glue 50 is located outside the mounting tube 43, and the part for squeezing the first soft glue 50 on the movable part 42 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 passes through the first soft glue 50 and is connected to the first fixing component, and the squeezing end portion 51 is in contact with the first soft glue 50; a first mounting groove 53 is provided on the lumbar support member 15, and the first soft glue 50 is provided in the first mounting groove 53. A part of the movable part 42 passes through the first soft glue 50 and is connected to the part of the first fixing component passing through 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 passes through the first gasket The plate 55 and the first mounting groove 53 are then screwed into the first connecting column 52 of the movable member 42 to connect the first connecting member 17 with the lumbar support member 15; a spring 47 is provided in the mounting tube 43 and is sleeved on the gear switch 40, and 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 on the first connecting member 17 and the lumbar support member 15, when the user leans on the seat to adjust the posture and move the waist and back, the lumbar support member 15 can generate corresponding swings with the constantly changing force applied by the user during the movement, so that the lumbar support member 15 can better fit the human waist, provide better support effect, and be more comfortable to use. The second embodiment is different from the first embodiment in 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 waist support member 15, and the first mounting groove 53 is set on the first connecting member 17. The rest of the structure is based on the first embodiment and will not be described in detail here. Figure 17-18, 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 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 84. 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 is at least partially located in the mounting cylinder 43, specifically, the portion where the moving member 42 is assembled with the gear switch 41 is located in the mounting tube 43, while the portion for squeezing the first soft glue 50 is located outside the mounting tube 43, and the portion on the moving 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, and the first connecting column 52 passes through the first soft glue 50 and is connected to the first fixed component, and the squeezing end portion 51 is in contact with the first soft glue 50; a first mounting groove 53 is provided on the lumbar support member 15, and the first soft glue 50 is provided in the first mounting groove 53, and a portion of the moving member 42 passes through the first soft glue 50 and is connected to the first fixed component 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 member 15. A spring 47 is provided in the mounting tube 43. One end of the spring 47 abuts against the end of the blind hole of the mounting tube 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 tube 43 is arc-shaped, and the three-dimensional shape is formed by a plane and a curved surface. A spring 47 is provided on the plane along the axial direction to connect with the gear switch 41. The tooth surfaces 87 of the meshing teeth mesh with each other. By rotating the gear switch 41, the meshing teeth on the positioning meshing portion 86 engage or disengage with the tooth surfaces 87 on the moving member 42 under eccentric movement, thereby locking or unlocking the moving member and maintaining it in the desired position, thereby fixing the position of the lumbar support member 15. Since the first soft rubber 50 is provided on the first connecting member 17 and the lumbar support member 15, when the user leans on the seat to adjust his posture and move his back, the lumbar support member 15 can swing accordingly with the constantly changing force applied by the user during movement, thereby making the lumbar support member 15 better fit the human waist, providing better support and more comfortable use. The fourth embodiment: The difference from the third 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 provided on the lumbar support member 15, and the first mounting groove 53 is provided on the first connecting member 17. The remaining structures refer to the third embodiment and are not described in detail here.Among them, the third implementation method has a simpler structure, is more convenient to operate, and is more practical.

[0059] like Figure 10-11 As shown, a second fine-motion adjustment component is provided between the third connection end 38 of the first connection member 17 and the back support member 16 and between the fourth connection end 39 of the first connection member 17 and the back support member 16; the structure of the second fine-motion adjustment component adopted in at least one of the third connection end 38 of the first connection member 17 and the back support member 16 and between the fourth connection end 39 of the first connection member 17 and the back support member 16 is as follows: 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 first connection member 17 and the back support member 16, specifically, the second soft glue 56 is provided between the third connection end 38 of the first connection member 17 and the back support member 16 and between the fourth connection end 39 of the first connection member 17 and the back support member 16, the first connection member 17 has a part After passing through the second soft glue 56, it is connected to the part of the second fixing component that passes through the back support 16, that is, the third connecting end 38 and the fourth connecting end 39 of the first connecting member 17 are respectively provided with a second connecting column 57, 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 16 and is screwed into the second connecting column 57 to connect the first connecting member 17 to the back support 16 and clamp the second soft glue 56 between the first connecting member 17 and the back support 16; alternatively, the second connecting column 57 can be set on the back support 16, and the second connecting screw 58 of the second fixing component passes through the second gasket and the first connecting member 17 and is screwed into the corresponding second connecting column 57 on the back support 16. By providing the second soft rubber 56, when a user adjusts their posture and moves their back while leaning on the chair, the back support 16 can swing in response to the changing force applied by the user during movement, thereby better conforming to the user's back, providing better support and greater comfort. The combined action of the first micro-adjustment assembly 400, the second micro-adjustment assembly, and the first connector 17 allows the entire backrest assembly to micro-move in response to the user's back movements, constantly conforming to the user's back, providing better support and greater comfort.

[0060] like Figure 11 、 Figure 12 and Figure 16As shown, the seat also includes a headrest assembly 59, which is located above the backrest 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.

[0061] 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 at the third connection member 60 Between the sixth connecting end 62 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. The third connecting screw in the third fixing assembly passes through the third gasket and the headrest assembly 59 and is then screwed into the inside 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 then screwed into the corresponding third connecting column on the headrest assembly 59. By setting the third soft rubber 64, the user can adjust his posture and move his 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 during movement, so that the headrest assembly 59 can better fit the back of the head and neck, provide better support, and be more comfortable to use. Through the combined action of the first micro-adjustment assembly 400, 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 backrest assembly and the headrest assembly 59 can produce corresponding micro-movements following the user's waist and back movements and head and neck movements, so as to always fit the user's waist and back and head and neck, provide better support and better comfort.

[0062] The technical effects of this utility model are mainly reflected in the following aspects:

[0063] It effectively supports the user's sacrum, improves the user experience and reduces discomfort.

[0064] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A seat, characterized in that: include: A seat assembly (200), a backrest assembly (100) and a sacrum support structure (4), wherein the backrest assembly includes a lumbar support member (15), a recessed portion (151) is formed at the bottom of the lumbar support member (15), the sacrum support structure (4) is located in the recessed portion (151), and the front end surface of the sacrum support structure (4) protrudes from the lumbar support member (15).

2. The seat according to claim 1, wherein: The sacrum support structure (4) is connected to the seat assembly (200) or the backrest assembly (100) via a mounting member (5), and the mounting member (5) is elastic; When force is applied to the sacrum support structure (4), the mounting member (5) drives the sacrum support structure (4) to move along the direction of force application.

3. The seat according to claim 2, wherein: Both sides of the waist support member (15) are bent respectively, and the sacrum support structure (4) is connected to the waist support member (15) via the mounting member (5).

4. The seat according to claim 1, wherein: The sacrum support structure (4) is roughly triangular in shape, and the top of the sacrum support structure (4) is raised to support the sacrum.

5. The seat according to claim 1, wherein: The backrest assembly (100) comprises a first connecting member (17) and a second connecting member (18) connected to the first connecting member (17), and at least one lifting assembly (14) is provided between the first connecting member (17) and the second connecting member (18) so that the first connecting member (17) can move relative to the second connecting member (18).

6. The seat according to claim 5, characterized in that: The lifting assembly (14) comprises a fixing member (19), a fixing seat (20), an elastic member (21) and a shift member (22); the shift 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 thereto; a shift rack (23) is provided on one inner side wall of the fixing member (19); a locking tooth (24) is provided on one side wall of the shift member (22); the locking tooth (24) of the shift member (22) is engaged with the shift rack (23) on the fixing member (19); and the elastic member (21) is provided between the shift member (22) and the fixing seat (20).

7. The seat according to claim 6, characterized in that: A first limiting wall (25) is provided in the fixing seat (20), and first strip holes (26) are respectively provided on two opposite side walls of the fixing seat (20). The lifting assembly (14) also includes a first rotating shaft (27). The shift member (22) is sleeved on the first rotating shaft (27). Both ends of the first rotating shaft (27) extend 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).

8. The seat according to claim 5, wherein: The backrest assembly (100) further includes a back support member (16), wherein the back support member (16) is connected to the lumbar support member (15) via the first connecting member (17), and a gap is provided between the back support member (16) and the lumbar support member (15); the first connecting member (17) includes a first connecting end (36), a second connecting end (37), a third connecting end (38) and a fourth connecting end (39), wherein the first connecting end (36) and the second connecting end (37) are respectively arranged on both sides of the lumbar support member (15) and are connected thereto, and the third connecting end (38) and the fourth connecting end (39) are respectively arranged on both sides of the back support member (16) and are connected thereto.

9. The seat according to claim 8, characterized in that: A first fine-motion adjustment component (400) is provided between the first connection end (36) and the lumbar support member (15) and / or between the second connection end (37) and the lumbar support member (15); A second fine-motion adjustment component is provided between the third connection end (38) and the back support member (16) and / or between the fourth connection end (39) and the back support member (16); The invention also includes a headrest assembly (59), wherein the headrest assembly (59) is located above the backrest assembly (100), and the headrest assembly (59) is connected to a third connecting member (60). The third connecting member (60) includes a fifth connecting end (61), a sixth connecting end (62), and a seventh connecting end (63). A third micro-adjustment assembly is provided between the sixth connecting end (62) and the headrest assembly (59) and / or between the seventh connecting end (63) and the headrest assembly (59).

10. The seat according to claim 2, wherein: The seat assembly (200) comprises a base (2), and the sacral support structure (4) is connected to the base (2) via the mounting member (5).

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