Seat support and zero-wall-leaning seat with same

Abstract

The invention provides a seat support and a zero-wall seat with the same, and the seat support comprises a linkage mechanism which comprises a support side plate and a linkage assembly, the support side plate is provided with a seat frame mounting surface, and the linkage assembly is hinged to the support side plate; the backrest mechanism comprises a backrest mounting plate and backrest rod sets, the front end of the backrest mounting plate and the rear end of the backrest mounting plate are hinged to the support side plates and the linkage assembly through the backrest rod sets respectively, and the backrest mounting plate has a retracting position and a backward leaning position; the linkage mechanism can drive the backrest mounting plate to be switched between the recovery position and the backward leaning position through the backrest rod set. When the backrest mounting plate is switched between the retracting position and the leaning-back position, the distance between the F point and the seat frame mounting surface is within a preset size range, so that the movement track of the F point is within the movement range of the waist of the human body. Through the technical scheme provided by the invention, the problem of poor user experience in related technologies can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture, and in particular to a chair bracket and a zero-wall chair having the same. Background Art

[0002] A movable sofa is a common piece of furniture in life, which allows people to adjust their posture according to their needs. A movable sofa usually includes two or three of the following postures: lying posture, TV posture and sitting posture. Among them, a movable sofa has legs, a seat and a backrest. By arranging soft padding on the corresponding structure, a soft-padded seat, a soft-padded backrest and a soft-padded footrest of the sofa are formed. In the sitting position, the legs are not opened, the seat is close to a horizontal state, and the backrest is in a nearly upright state. In the TV posture, also called the TV posture, the legs are opened forward and the backrest remains basically unchanged. In the lying position, the backrest tilts back and the legs remain basically unchanged for people to rest.

[0003] However, when the existing movable sofa is unfolded, the backrest part tilts backwards, and the back of the human body will be displaced greatly relative to the backrest of the sofa, thereby reducing the user's experience. Summary of the invention

[0004] The present invention provides a seat bracket and a zero-wall seat having the same, so as to solve the problem of poor user experience in the related art.

[0005] According to one aspect of the present invention, a seat bracket is provided, which includes: a linkage mechanism, including a bracket side panel and a linkage assembly, the bracket side panel has a seat frame mounting surface, and the linkage assembly is hinged to the bracket side panel; a backrest mechanism, including a backrest mounting plate and a backrest rod group, the front end of the backrest mounting plate and the rear end of the backrest mounting plate are respectively hinged to the bracket side panel and the linkage assembly through the backrest rod group, the backrest mounting plate has a recovery position recovered relative to the bracket side panel and a reclining position tilted backward relative to the bracket side panel, and the linkage mechanism can drive the backrest mounting plate to switch between the recovery position and the reclining position through the backrest rod group. When the backrest mounting plate is in the retracted position, the rear end of the backrest mounting plate is located at point A, and the front end of the backrest mounting plate is located at point B. When the backrest mounting plate is in the reclining position, the rear end of the backrest mounting plate is located at point C, and the front end of the backrest mounting plate is located at point D. The line connecting point A and point C is line L1, and the line connecting point B and point D is line L2. The intersection of the vertical center line of line L1 and the vertical center line of line L2 is point F. When the backrest mounting plate switches between the retracted position and the reclining position, the distance between point F and the seat frame mounting surface is within a preset size range, so that the movement trajectory of point F is within the range of motion of the human waist.

[0006] Further, the preset size is between 78 mm and 239 mm; or, the preset size is between 78 mm and 217 mm; or, the preset size is between 100 mm and 239 mm.

[0007] Further, the distance between point F and the center line of the backrest mounting plate is between 80 mm and 320 mm.

[0008] Further, the backrest rod group includes a first backrest rod, a second backrest rod, a first driving rod and a second driving rod, the upper end of the first backrest rod and the upper end of the second backrest rod are respectively hinged to the front end and the rear end of the backrest mounting plate, the rear end of the first driving rod and one of the rear ends of the second driving rod are both hinged to the lower end of the first backrest rod and the lower end of the second backrest rod, one of the first driving rod and the second driving rod, the first backrest rod, the second backrest rod and the backrest mounting plate form a first connecting rod structure, the rear end of the first driving rod and the other of the rear ends of the second driving rod are hinged to the first connecting rod structure to deform the first connecting rod structure; the front end of the first driving rod and one of the front ends of the second driving rod are hinged to the bracket side plate, the front end of the first driving rod and the other of the front ends of the second driving rod are hinged to the linkage assembly, and the first driving rod, the second driving rod, the bracket side plate and the linkage assembly form a second connecting rod structure.

[0009] Furthermore, the upper end of the first backrest rod is hinged to the front end of the backrest mounting plate, the upper end of the second backrest rod is hinged to the rear end of the backrest mounting plate, the lower end of the first backrest rod is hinged to the middle part of the first driving rod, the lower end of the second backrest rod is hinged to the rear end of the first driving rod, the front end of the first driving rod is hinged to the linkage assembly, the front end of the second driving rod is hinged to the bracket side plate, the rear end of the second driving rod is hinged to the first connecting rod structure, and the backrest mechanism also includes a limit rod for keeping the backrest mounting plate in a recovery position or a reclining position.

[0010] Furthermore, the middle portion of the second driving rod is hinged to the middle portion of the first backrest rod, the front end of the limiting rod is hinged to the rear end of the second driving rod, and the rear end of the limiting rod is hinged to the middle portion of the second backrest rod.

[0011] Furthermore, the backrest rod group also includes a third backrest rod, the first backrest rod is hinged to the third backrest rod, one of the upper ends of the first backrest rod and the second backrest rod is hinged to the front end of the backrest mounting plate, the other of the upper ends of the first backrest rod and the second backrest rod is hinged to the rear end of the backrest mounting plate, the rear end of the first driving rod and the rear end of the second driving rod are hinged to the lower end of the third backrest rod and the lower end of the second backrest rod, the first backrest rod, the third backrest rod, the other of the first driving rod and the second driving rod, the second backrest rod and the backrest mounting plate together form a first connecting rod structure, a movable hinge end is provided on the first connecting rod structure, and the rear end of the first driving rod and the other of the rear end of the second driving rod are hinged to the movable hinge end.

[0012] Furthermore, the movable hinge end is the lower end of the first backrest rod, the middle part of the first backrest rod is hinged to the upper end of the third backrest rod, the first driving rod is hinged to the second driving rod, and the first driving rod, the second driving rod, the first backrest rod and the third backrest rod form a third connecting rod structure.

[0013] Furthermore, the front end of the second driving rod is hinged to the side plate of the bracket, the middle part of the first driving rod is hinged to the middle front part of the second driving rod, the lower end of the third backrest rod is hinged to the middle rear part of the second driving rod, the lower end of the second backrest rod is hinged to the rear end of the second driving rod, and the lower end of the first driving rod is hinged to the linkage assembly.

[0014] Furthermore, the backrest mechanism also includes a limit button, and a limit button is provided on at least one of the backrest mounting plate and the backrest rod group. The limit button can abut against one of the backrest mounting plate and the backrest rod group to keep the backrest mounting plate in the retracted position or the reclining position.

[0015] Furthermore, an arc groove is provided at the lower end of the backrest mounting plate. When the backrest mounting plate is in the recovery position, the limit button abuts against the front end of the arc groove. When the backrest mounting plate moves to the reclining position, the limit button moves backward relative to the arc groove and abuts against the arc groove.

[0016] Furthermore, when the backrest mounting plate is located in the reclining position, the angle between the first backrest rod and the seat frame mounting surface of the bracket side plate is an acute angle.

[0017] Furthermore, when the backrest mounting plate is switched from the retracted position to the reclining position, the rotation angle of the backrest mounting plate relative to the seat frame mounting surface of the bracket side plate is between 30° and 38°.

[0018] Further, when the backrest mounting plate is located at the retracted position, the distance between the front end of the backrest mounting plate and the ground is between 328 mm and 380 mm.

[0019] Furthermore, the seat support also includes a base, and the linkage assembly includes a first linkage plate, a second linkage plate, a third linkage plate, a fourth linkage plate and a fifth linkage plate, the lower end of the first linkage plate is hinged to the base, the upper end of the first linkage plate is hinged to the front end of the second linkage plate, the rear end of the second linkage plate is hinged to the side plate of the support, the front end of the third linkage plate is hinged to the middle part of the second linkage plate, the rear end of the third linkage plate is hinged to the front end of the fourth linkage plate, the lower end of the fourth linkage plate is hinged to the lower end of the side plate of the support, and the fourth linkage plate is hinged to the lower end of the side plate of the support. The rear end of the plate is hinged to the backrest rod group, the upper end of the fourth linkage plate is hinged to the upper end of the fifth linkage plate, and the lower end of the fifth linkage plate is hinged to the base; the seat bracket also includes an anti-tilt mechanism, the anti-tilt mechanism includes a first anti-tilt rod and a second anti-tilt rod, the upper end of the first anti-tilt rod is hinged to the upper end of the second anti-tilt rod, the middle part of the first anti-tilt rod is hinged to the front end of the linkage assembly, the lower end of the second anti-tilt rod is hinged to the base, and when the backrest mounting plate is in the reclining position, the lower end of the first anti-tilt rod is in contact with the ground.

[0020] Furthermore, the seat bracket also includes a driving mechanism, which includes a driving member, a slider, a driving connecting rod and a transmission rod. The driving member is drivingly connected to the slider to drive the slider to move along the front-to-back direction of the base. The driving connecting rod extends along the front-to-back direction of the base, and the transmission rod extends along the left-to-right direction of the base. The slider is hinged to the lower end of the driving connecting rod, and the upper end of the driving connecting rod is hinged to the transmission rod. The transmission rod is drivingly connected to the side plate of the bracket. In the process of the driving member driving the slider to slide, the slider can drive the driving connecting rod to rotate, thereby moving the transmission rod forward and upward, and the transmission rod drives the backrest mounting plate from the recovery position to the reclining position through the side plates of the bracket and the linkage assembly; and / or, the seat bracket also includes a footstool assembly, and the footstool assembly includes an inner bench board, an outer bench board, and a front bench board , rear bench board, a first front bench connecting rod, a second front bench connecting rod, a rear bench connecting rod, a front footstool and a rear footstool, the rear end of the outer bench board is hinged to the side panel of the bracket, the front end of the outer bench board is hinged to the rear end of the rear bench board, the rear end of the inner bench board is hinged to the side panel of the bracket, the front end of the inner bench board is hinged to the rear end of the front bench board, the middle part of the inner bench board is hinged to the middle part of the rear bench board, the rear end of the first front bench connecting rod is hinged to the middle part of the rear bench board, the middle part of the first front bench connecting rod is hinged to the middle part of the front bench board, the front end of the first front bench connecting rod is hinged to the rear end of the second front bench connecting rod, the front footstool is respectively hinged to the front end of the front bench board and the front end of the second front bench connecting rod, the lower end of the rear bench connecting rod is hinged to the middle part of the second front bench connecting rod, and the rear footstool is respectively hinged to the front end of the rear bench board and the upper end of the rear bench connecting rod.

[0021] According to another aspect of the present invention, a zero-wall seat is provided, and the zero-wall seat includes the seat bracket provided above.

[0022] By applying the technical solution of the present invention, the seat bracket includes a linkage mechanism and a backrest mechanism. Since the front and rear ends of the backrest mounting plate are respectively hinged to the bracket side plate and the linkage assembly through the backrest rod group, the linkage mechanism can switch the backrest mounting plate between the retracted position and the reclining position through the backrest rod group. In addition, when the backrest mounting plate switches between the retracted position and the reclining position, the distance between point F and the seat frame mounting surface of the bracket side plate is within a preset size range, so that the movement trajectory of point F can be within the range of motion of the human waist, so that the range of motion of the human waist relative to the moving distance of the seat frame mounting surface is very small, and when the seat bracket moves, the movement of the human waist relative to the seat frame mounting surface is reduced, so that the movement displacement of the human back relative to the backrest mounting plate is very small, producing an "anti-rubbing back" effect, thereby improving the user experience when using the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A comparison diagram showing a backrest mounting plate of a seat support provided in an embodiment of the present invention in a retracted position and a reclining position;

[0025] Figure 2 It shows a schematic structural diagram of a seat support provided according to Embodiment 1 of the present invention when it is in a TV posture;

[0026] Figure 3 It shows a schematic structural diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a lying position;

[0027] Figure 4 It shows a schematic structural diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a sitting position;

[0028] Figure 5 It shows a schematic structural diagram of a seat support provided according to Embodiment 1 of the present invention when it is in a TV posture;

[0029] Figure 6 It shows a schematic structural diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a lying position;

[0030] Figure 7 A partial schematic diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a TV posture is shown;

[0031] Figure 8 A partial schematic diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a lying position is shown;

[0032] Fig. 9A partial schematic diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a TV posture is shown;

[0033] Fig.10 A partial schematic diagram of a seat support provided according to Embodiment 1 of the present invention when the seat support is in a lying position is shown;

[0034] Fig.11 A comparison diagram of three postures of a seat bracket provided according to Embodiment 1 of the present invention is shown;

[0035] Fig.12 It shows a schematic structural diagram of a seat support provided in a second embodiment of the present invention when the seat support is in a TV posture;

[0036] Fig.13 It shows a schematic structural diagram of a seat support provided in a second embodiment of the present invention when the seat support is in a lying position;

[0037] Fig.14 It shows a schematic structural diagram of a seat support provided in a second embodiment of the present invention when the seat support is in a sitting position;

[0038] Fig.15 It shows a schematic structural diagram of a seat support provided in a second embodiment of the present invention when the seat support is in a TV posture;

[0039] Fig.16 It shows a schematic structural diagram of a seat support provided in a second embodiment of the present invention when the seat support is in a lying position;

[0040] Fig.17 A partial schematic diagram of a seat support provided in accordance with Embodiment 2 of the present invention when the seat support is in a TV posture is shown;

[0041] Fig.18 A partial schematic diagram of a seat support provided in accordance with a second embodiment of the present invention when the seat support is in a lying position is shown;

[0042] Fig.19 A partial schematic diagram of a seat support provided in accordance with Embodiment 2 of the present invention when the seat support is in a TV posture is shown;

[0043] Fig. 20 A partial schematic diagram of a seat support provided in accordance with a second embodiment of the present invention when the seat support is in a lying position is shown;

[0044] Fig.21 A comparison diagram of three postures of a seat bracket provided according to the second embodiment of the present invention is shown.

[0045] The above drawings include the following reference numerals:

[0046] 10. Base;

[0047] 20. linkage mechanism; 21. bracket side plate; 22. linkage assembly; 221. first linkage plate; 222. second linkage plate; 223. third linkage plate; 224. fourth linkage plate; 225. fifth linkage plate; 24. first linkage rod; 25. second linkage rod; 26. third linkage rod;

[0048] 30. backrest mechanism; 31. backrest mounting plate; 311. arc groove; 32. first backrest rod; 33. second backrest rod; 34. first driving rod; 35. second driving rod; 36. limit rod; 37. limit button; 38. third backrest rod;

[0049] 40. Anti-tilt mechanism; 41. First anti-tilt bar; 42. Second anti-tilt bar;

[0050] 50. driving mechanism; 51. sliding block; 52. driving connecting rod; 53. transmission rod; 54. front driving plate;

[0051] 60. Footstool assembly; 61. Inner bench board; 62. Outer bench board; 63. Front bench board; 64. Rear bench board; 65. First front bench connecting rod; 66. Second front bench connecting rod; 67. Rear bench connecting rod; 68. Front footstool; 69. Rear footstool. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] like Figures 1 to 21As shown, an embodiment of the present invention provides a seat bracket, the seat bracket includes a linkage mechanism 20 and a backrest mechanism 30, the linkage mechanism 20 includes a bracket side plate 21 and a linkage assembly 22, the bracket side plate 21 has a seat frame mounting surface, and the linkage assembly 22 is hinged to the bracket side plate 21; the backrest mechanism 30 includes a backrest mounting plate 31 and a backrest rod group, the front end of the backrest mounting plate 31 and the rear end of the backrest mounting plate 31 are respectively hinged to the bracket side plate 21 and the linkage assembly 22 through the backrest rod group, the backrest mounting plate 31 has a recovery position recovered relative to the bracket side plate 21 and a reclining position tilted backward relative to the bracket side plate 21, and the linkage mechanism 20 can drive the backrest mounting plate 31 through the backrest rod group. Switching between the recovery position and the reclining position, when the backrest mounting plate 31 is in the recovery position, the rear end of the backrest mounting plate 31 is located at point A, and the front end of the backrest mounting plate 31 is located at point B, when the backrest mounting plate 31 is in the reclining position, the rear end of the backrest mounting plate 31 is located at point C, and the front end of the backrest mounting plate 31 is located at point D, the line connecting point A and point C is line L1, the line connecting point B and point D is line L2, and the intersection of the vertical center line of line L1 and the vertical center line of line L2 is point F. When the backrest mounting plate 31 switches between the recovery position and the reclining position, the distance between point F and the seat frame mounting surface is within the preset size K1 range, so that the movement trajectory of point F is within the range of activity of the human waist.

[0054] By applying the technical solution of the present invention, the seat support includes a linkage mechanism 20 and a backrest mechanism 30. Since the front and rear ends of the backrest mounting plate 31 are respectively hinged to the support side plate 21 and the linkage assembly 22 through the backrest rod group, the linkage mechanism 20 can switch the backrest mounting plate 31 between the retracted position and the reclining position through the backrest rod group. Moreover, when the backrest mounting plate 31 switches between the retracted position and the reclining position, the distance between point F and the seat frame mounting surface of the support side plate 21 is within a preset size range, so that the movement trajectory of point F can be within the range of movement of the human waist, so that the movement range of the human waist relative to the seat frame mounting surface is very small, and then when the seat support moves, the movement of the human waist relative to the seat frame mounting surface is reduced, so that the movement displacement of the human back relative to the backrest mounting plate 31 is very small, producing an "anti-rubbing back" effect, thereby improving the user experience when using the seat.

[0055] Among them, the positions of A, B, C, and D are the positions of the backrest mounting plate 31 relative to the bracket side plate 21 after the backrest mounting plate 31 is installed on the seat bracket. The front end and the rear end of the backrest mounting plate 31 refer to the two hinge points between the backrest mounting plate 31 and the backrest rod group.

[0056] In this embodiment, since point F is the intersection of lines L1 and L2, L1 is related to the rear end of the backrest mounting plate 31, and L2 is related to the front end of the backrest mounting plate 31, point F is the rotation center of the backrest mounting plate 31. When the seat bracket moves, the displacement of the rotation center of the backrest mounting plate 31 and the seat frame mounting surface is very small, so the displacement of the human waist relative to the seat frame mounting surface is very small.

[0057] It should be noted that no matter the seat bracket is in a sitting position, a TV position or a lying position, the movement trajectory of point F is always within the range of motion of the human waist.

[0058] The preset size K1 is between 78 mm and 239 mm. By adopting the above size range, the distance between point F and the seat frame mounting surface and the distance between the human waist and the seat frame mounting surface can be close, thereby reducing the range of motion of the human waist relative to the seat frame mounting surface when the seat is moving.

[0059] It should be noted that, depending on the location of the seat frame mounting surface, the distance between point F and the seat frame mounting surface can have different size ranges. Specifically, the seat frame mounting surface protrudes from the upper surface of the bracket side plate 21, or the seat frame mounting surface is located below the upper surface of the bracket side plate 21. Between the above two solutions, the distance between the seat frame mounting surfaces is about 20 mm, so that the preset size K1 can be between 78 mm and 217 mm; or, the preset size K1 is between 100 mm and 239 mm.

[0060] Among them, the distance K1 between point F and the seat frame mounting surface can be 78mm, 85mm, 96mm, 100mm, 120mm, 150mm, 175mm, 186mm, 200mm, 217mm, 224mm, 239mm and any value between 78mm and 239mm.

[0061] like Figure 1 As shown, the distance between point F and the center line of the backrest mounting plate 31 is between 80 mm and 320 mm. By setting the distance between point F and the center line of the backrest mounting plate 31 within the above-mentioned size range, when the seat moves, the back of the human body can always fit with the seat back, and the back can follow the movement of the seat back without moving, thereby improving the user experience of the seat.

[0062] The distance between point F and the center line of the backrest mounting plate 31 may be 80 mm, 100 mm, 150 mm, 200 mm, 260 mm, 300 mm, 320 mm, or any value between 80 mm and 320 mm.

[0063] It should be noted that if Figure 1As shown, when the backrest mounting plate is in the retracted position, the distance between point F and the center line of the backrest mounting plate 31 is K2, and when the backrest mounting plate is in the reclining position, the distance between point F and the center line of the backrest mounting plate 31 is K3, K2=K3.

[0064] The center line of the backrest mounting plate 31 refers to that the backrest mounting plate 31 has two mounting holes connected to the backrest plate, and the connecting line between the two mounting holes is the center line of the backrest mounting plate 31 .

[0065] like Figure 2 and Fig.12 As shown, the backrest rod group includes a first backrest rod 32, a second backrest rod 33, a first driving rod 34 and a second driving rod 35. The upper end of the first backrest rod 32 and the upper end of the second backrest rod 33 are respectively hinged to the front end of the backrest mounting plate 31 and the rear end of the backrest mounting plate 31, and the rear end of the first driving rod 34 and the rear end of the second driving rod 35 are both hinged to the lower end of the first backrest rod 32 and the lower end of the second backrest rod 33. 3 and the backrest mounting plate 31 form a first connecting rod structure, the rear end of the first driving rod 34 and the other of the rear ends of the second driving rod 35 are hinged to the first connecting rod structure to deform the first connecting rod structure; the front end of the first driving rod 34 and one of the front ends of the second driving rod 35 are hinged to the bracket side plate 21, the front end of the first driving rod 34 and the other of the front ends of the second driving rod 35 are hinged to the linkage assembly 22, and the first driving rod 34, the second driving rod 35, the bracket side plate 21 and the linkage assembly 22 form a second connecting rod structure. With the above-mentioned backrest rod group, the linkage assembly 22 is tilted forward relative to the bracket side plate 21, so that the second connecting rod structure can be deformed, and then the first driving rod and the second driving rod can be driven to move forward and downward, and because the other of the first driving rod and the second driving rod is hinged to the first connecting rod structure, the first connecting rod structure can be deformed, so that the backrest mounting plate 31 is tilted backward, so that the backrest mounting plate 31 is switched from the recovery position to the reclining position.

[0066] The movement process of the backrest mounting plate 31 switching from the reclining position to the retracting position is opposite to the above process.

[0067] It should be noted that both the first link structure and the second link structure are multi-link structures, such as a four-link structure or a five-link structure.

[0068] like Figure 2 and Fig.12As shown, the seat support also includes an anti-tilt mechanism 40, which includes a first anti-tilt rod 41 and a second anti-tilt rod 42. The upper end of the first anti-tilt rod 41 is hinged to the upper end of the second anti-tilt rod 42, the middle of the first anti-tilt rod 41 is hinged to the front end of the linkage assembly 22, and the lower end of the second anti-tilt rod 42 is hinged to the base 10. When the backrest mounting plate 31 is in the reclining position, the lower end of the first anti-tilt rod 41 contacts the ground. With the anti-tilt mechanism 40, in the lying state, the first anti-tilt rod 41 contacts the ground to form support, thereby providing support for the seat support and reducing the risk of the seat support tilting in the zero gravity state.

[0069] In this embodiment, a roller is provided at the lower end of the first anti-tilt bar 41 , and in the lying state, the roller is in contact with the ground.

[0070] like Figure 7 and Figure 8 As shown, the linkage assembly 22 includes a first linkage plate 221, a second linkage plate 222, a third linkage plate 223, a fourth linkage plate 224 and a fifth linkage plate 225. The lower end of the first linkage plate 221 is hinged to the base 10, the upper end of the first linkage plate 221 is hinged to the front end of the second linkage plate 222, the rear end of the second linkage plate 222 is hinged to the bracket side plate 21, the front end of the third linkage plate 223 is hinged to the middle part of the second linkage plate 222, the rear end of the third linkage plate 223 is hinged to the front end of the fourth linkage plate 224, the lower end of the fourth linkage plate 224 is hinged to the lower end of the bracket side plate 21, the rear end of the fourth linkage plate 224 is hinged to the backrest rod group, the upper end of the fourth linkage plate 224 is hinged to the upper end of the fifth linkage plate 225, and the lower end of the fifth linkage plate 225 is hinged to the base 10. By adopting the above-mentioned linkage assembly 22, when the seat switches from the TV posture to the lying posture, the backrest mounting plate 31 moves from the retracted position to the reclining position, the first linkage plate 221 and the fifth linkage plate 225 tilt forward relative to the base 10, the upper end of the first linkage plate 221 moves forward and downward, and drives the second linkage plate 222 to rotate counterclockwise relative to the bracket side plate 21, the front end of the second linkage plate 222 moves downward, the second linkage plate 222 drives the third linkage plate 223 to rotate counterclockwise, the front end of the third linkage plate 223 moves downward, and its rear end moves upward, the third linkage plate 223 drives the fourth linkage plate 224 to rotate clockwise relative to the bracket side plate 21, the fourth linkage plate 224 drives the fifth linkage plate 225 to tilt forward relative to the base 10, and drives the lower end of the backrest rod group to move downward.

[0071] The middle portion of the first anti-tilt rod 41 is hinged to the first linkage plate 221 .

[0072] like Figures 3 to 5As shown, the seat bracket also includes a driving mechanism 50, which includes a driving member, a slider 51, a driving link 52 and a transmission rod 53. The driving member is drivingly connected to the slider 51 to drive the slider 51 to move along the front-to-back direction of the base 10. The driving link 52 extends along the front-to-back direction of the base 10, and the transmission rod 53 extends along the left-to-right direction of the base 10. The slider 51 is hinged to the lower end of the driving link 52, and the upper end of the driving link 52 is hinged to the transmission rod 53. The transmission rod 53 is drivingly connected to the bracket side plate 21. In the process of the driving member driving the slider 51 to slide, the slider 51 can drive the driving link 52 to rotate, thereby moving the transmission rod 53 forward and upward, and the transmission rod 53 drives the backrest mounting plate 31 from the recovery position to the reclining position through the bracket side plate 21 and the linkage assembly 22. The driving member drives the slider 51 to slide forward along the front-to-back direction of the base 10, the rear end of the driving connecting rod 52 rotates relative to the slider 51, and the front end of the driving connecting rod 52 moves forward and upward relative to the slider 51, and drives the transmission rod 53 to move forward and upward, and then the transmission rod 53 drives the bracket side plate 21 connected to it to move forward and upward, and the bracket side plate 21 drives the linkage assembly 22 to move forward and upward relative to the base 10.

[0073] Specifically, the bracket side plate 21 has a through hole extending therethrough, and the transmission rod 53 passes through the through hole.

[0074] like Figure 2 and Figure 6 As shown, the seat support also includes a footrest assembly 60, which includes an inner bench board 61, an outer bench board 62, a front bench board 63, a rear bench board 64, a first front bench connecting rod 65, a second front bench connecting rod 66, a rear bench connecting rod 67, a front footrest 68 and a rear footrest 69. The rear end of the outer bench board 62 is hinged to the support side board 21, the front end of the outer bench board 62 is hinged to the rear end of the rear bench board 64, the rear end of the inner bench board 61 is hinged to the support side board 21, the front end of the inner bench board 61 is hinged to the rear end of the front bench board 63, and the middle of the inner bench board 61 is hinged to the support side board 21. It is hinged to the middle part of the rear bench board 64, the rear end of the first front bench connecting rod 65 is hinged to the middle part of the rear bench board 64, the middle part of the first front bench connecting rod 65 is hinged to the middle part of the front bench board 63, the front end of the first front bench connecting rod 65 is hinged to the rear end of the second front bench connecting rod 66, the front footrest 68 is hinged to the front end of the front bench board 63 and the front end of the second front bench connecting rod 66 respectively, the lower end of the rear bench connecting rod 67 is hinged to the middle part of the second front bench connecting rod 66, and the rear footrest 69 is hinged to the front end of the rear bench board 64 and the upper end of the rear bench connecting rod 67 respectively.

[0075] In this embodiment, the left and right sides of the seat frame are symmetrical structures, and both sides are provided with a linkage mechanism 20 and a backrest mechanism 30. At the same time, in order to make the seat frame more stable, a connecting beam extending in the horizontal direction is provided between the linkage mechanisms 20 on both sides.

[0076] Wherein, the driving component is a linear motor.

[0077] In this embodiment, in the electric scheme, the drive mechanism 50 further includes a front drive plate 54, and the two ends of the front drive plate 54 are respectively hinged to the transmission rod 53 and the outer bench plate 62. In the non-electric scheme, the linkage mechanism 20 further includes a first linkage rod 24, a second linkage rod 25 and a third linkage rod 26, the front end of the first linkage rod 24 is hinged to the middle of the first linkage plate 221, the rear end of the first linkage rod 24 is hinged to the upper end of the second linkage rod 25, the middle part of the second linkage rod 25 is hinged to the bracket side plate 21, the lower end of the second linkage rod 25 is hinged to the rear end of the third linkage rod 26, and the front end of the third linkage rod 26 is hinged to the outer bench plate 62.

[0078] When the driving member drives the slider 51 to slide, the slider 51 can drive the driving connecting rod 52 to rotate, thereby driving the transmission rod 53 to rotate, and the transmission rod 53 drives the front driving plate 54 to move forward, and the front driving plate 54 drives the outer bench plate 62 to extend relative to the bracket side plate 21, and the outer bench plate 62 drives the rear bench plate 64 to extend, and the rear bench plate 64 drives the inner bench plate 61 to extend, and the inner bench plate 61 drives the front bench plate 63 to extend, and the four-bar structure formed by the front bench plate 63, the front footrest 68, the first front bench connecting rod 65 and the second front bench connecting rod 66 drives the front footrest 68 to extend, and the rear bench plate 64 and the rear bench connecting rod 67 jointly drive the rear footrest 69 to extend, so that the footrest assembly 60 is switched from the folded position to the extended position. The recovery process of the footrest assembly 60 is opposite to the above process, which will not be repeated here.

[0079] In the non-electric solution, during the extension of the footrest assembly 60, the bracket side plate 21 moves forward relative to the linkage assembly 22, causing the rear end of the first linkage rod 24 to move backward, thereby driving the second linkage rod 25 to rotate relative to the bracket side plate 21, the upper end of the second linkage rod 25 moves backward, and the front end moves forward, and the second linkage rod 25 drives the third linkage rod 26 to move forward, thereby causing the footrest assembly 60 to extend.

[0080] Among them, the lying posture of the seat frame corresponds to the footrest assembly being in the extended position and the backrest mounting plate 31 being in the reclining position, the TV posture of the seat frame corresponds to the footrest assembly being in the extended position and the backrest mounting plate 31 being in the retracted position, and the sitting posture of the seat frame corresponds to the footrest assembly being in the folded position and the backrest mounting plate 31 being in the retracted position.

[0081] like Figure 7 and Fig.17As shown, the backrest mechanism 30 further includes a limit button 37, and at least one of the backrest mounting plate 31 and the backrest rod group is provided with the limit button 37, and the limit button 37 can abut against one of the backrest mounting plate 31 and the backrest rod group to keep the backrest mounting plate 31 in the retracted position or the reclining position. The structure of limiting the backrest mounting plate 31 in the retracted position or the reclining position by using the limit button 37 has the advantages of simple structure and easy setting.

[0082] The number of the limit buttons 37 can be one or more. The limit button 37 can be set on any connecting rod of the backrest mechanism, and the limit button 37 can be in abutment state when the backrest mounting plate 31 is in the retracted position or the reclining position. When there are two limit buttons 37, the two limit buttons 37 can be respectively in abutment with different connecting rods in the retracted position or the reclining position.

[0083] like Figure 7 and Fig.14 As shown, the lower end of the backrest mounting plate 31 is provided with an arc groove 311. When the backrest mounting plate 31 is in the retracted position, the limit button 37 abuts against the front end of the arc groove 311. When the backrest mounting plate 31 moves to the reclining position, the limit button 37 moves backward relative to the arc groove 311 and abuts against the arc groove 311. With the above structure, when the backrest mounting plate 31 rotates, the arc groove 311 can be used to avoid the backrest mounting plate 31, so that the backrest mounting plate 31 rotates smoothly.

[0084] In this embodiment, the curvature radius of the front end of the arc-shaped groove 311 is smaller than the curvature radius of the middle part thereof.

[0085] like Fig.10 and Fig. 20 As shown, when the backrest mounting plate 31 is in the reclining position, the angle G between the first backrest rod 32 and the seat frame mounting surface is an acute angle. The above-mentioned acute angle structure can, on the one hand, make the front end of the backrest mounting plate 31 closer to the seat frame mounting surface to reduce the distance between the bracket side plate 21 and the backrest mounting plate 31. After the soft bag is installed, the seat soft bag and the backrest soft bag have the characteristic of zero gap. While having zero gap, it can also prevent the user's top from being pulled out due to inappropriate relative displacement between the backrest and the seat when the seat is unfolded, thereby providing a comfortable experience with zero back rubbing.

[0086] Among them, the angle G between the first backrest rod 32 and the seat frame mounting surface refers to the angle between the line connecting the hinge point of the first backrest rod 32 and the backrest mounting plate 31 and the hinge point of the first backrest rod 32 and the first driving rod 34 and the seat frame mounting surface.

[0087] In this embodiment, when the backrest mounting plate 31 is switched from the retracted position to the reclining position, the rotation angle of the backrest mounting plate 31 relative to the seat frame mounting surface is between 30° and 38°. The above angle range enables the backrest mounting plate 31 to have a larger reclining angle, so that the backrest can meet the characteristics of zero leaning against the wall. In addition, because of the height reduction characteristics of the backrest, the backrest is lower, the zero gravity function is more significant, and the experience is better.

[0088] Among them, the rotation angle of the backrest mounting plate 31 relative to the seat frame mounting surface can be 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38° and any value between 30° and 38°.

[0089] The rotation angle of the backrest mounting plate 31 relative to the seat frame mounting surface of the bracket side plate 21 refers to the rotation angle of the center line of the backrest mounting plate 31 relative to the seat frame mounting surface.

[0090] like Fig. 9 and Fig.19 As shown, when the backrest mounting plate 31 is in the retracted position, the distance H between the front end of the backrest mounting plate 31 and the ground is between 328 mm and 380 mm. With the above size range, after the backrest soft bag is installed, and when the backrest is in a sitting position, the distance between the highest point of the backrest soft bag and the ground can reach 965 mm, which helps to increase the height of the backrest mounting plate 31, thereby achieving a higher zero-wall backrest, and a higher and more comfortable backrest.

[0091] In this embodiment, the first backrest rod 32 is relatively long, and when the user is in a sitting position, the first backrest rod 32 is nearly in a vertical state.

[0092] The distance H between the backrest mounting plate 31 and the ground may be 328 mm, 330 mm, 340 mm, 350 mm, 360 mm, 370 mm, 380 mm, or any value between 328 mm and 380 mm.

[0093] Specifically, in the sitting posture, the distance between the front end of the backrest mounting plate 31 and the ground is 360 mm, and in the TV posture, the distance between the front end of the backrest mounting plate 31 and the ground is 328 mm.

[0094] It should be noted that the distance between the front end of the backrest mounting plate 31 and the ground refers to the distance between the hinge point between the backrest mounting plate 31 and the first backrest rod 32 and the ground.

[0095] like Figures 2 to 11As shown, in the first embodiment of the present invention, a seat bracket is provided. In the first embodiment, the upper end of the first backrest rod 32 is hinged to the front end of the backrest mounting plate 31, the upper end of the second backrest rod 33 is hinged to the rear end of the backrest mounting plate 31, the lower end of the first backrest rod 32 is hinged to the middle part of the first drive rod 34, the lower end of the second backrest rod 33 is hinged to the rear end of the first drive rod 34, the front end of the first drive rod 34 is hinged to the linkage assembly 22, the front end of the second drive rod 35 is hinged to the bracket side plate 21, the rear end of the second drive rod 35 is hinged to the first connecting rod structure, and the backrest mechanism 30 also includes a limit rod 36 that keeps the backrest mounting plate 31 in the recovery position or the reclining position. With the above-mentioned seat bracket, when the second connecting rod structure is deformed, the first connecting rod structure can be driven to deform through the second driving rod 35 to make the backrest mounting plate 31 recline.

[0096] In the first embodiment, the first backrest rod 32, the backrest mounting plate 31, the second backrest rod 33 and the first driving rod 34 together form a first connecting rod structure, and the first connecting rod structure is a four-link structure. The backrest mounting plate 31 is tilted back by deformation of the four-link structure. In addition, the backrest mounting plate 31 can be kept in the retracted position or the tilted position by setting the limit rod 36 to prevent the first connecting rod structure from being deformed, and to prevent the seat from being shaken or even tipped over.

[0097] Furthermore, the first connecting rod structure formed by the reclining assembly and the backrest mounting plate 31 is hinged to the bracket side plate 21 by means of the second driving rod 35, rather than the backrest mounting plate 31 being directly hinged to the bracket side plate 21. The design enables the front end of the backrest mounting plate 31 to move forward a greater distance in a lying position, thereby achieving the zero wall-leaning function.

[0098] like Figure 7 and Fig. 9 As shown, the middle part of the second driving rod 35 is hinged to the middle part of the first backrest rod 32, the front end of the limiting rod 36 is hinged to the rear end of the second driving rod 35, and the rear end of the limiting rod 36 is hinged to the middle part of the second backrest rod 33. With the above structure, the limiting rod 36 is used, and when the second driving rod 35 rotates clockwise, the second backrest rod 33 can be pulled by the limiting rod 36, so that the upper end of the second backrest rod 33 rotates counterclockwise, so that the deformation of the first connecting rod structure is smoother, and the forward and backward tilting of the backrest mounting plate 31 is smoother.

[0099] The first drive rod 34 can also be hinged on the second backrest rod 33 to achieve deformation of the first connecting rod structure. When the first drive rod 34 is hinged on the second backrest rod 33, the first drive rod 34 can be directly hinged on the second backrest rod 33 or indirectly hinged on the second backrest rod 33. For example, the first drive rod 34 is hinged on the second backrest rod 33 through the limiting rod 36 of the first embodiment.

[0100] In embodiment one, the first backrest rod 32, the second drive rod 35, the limit rod 36, the second backrest rod 33 and the first drive rod 34 form a five-link structure, and the first backrest rod 32, the second drive rod 35, the limit rod 36, the second backrest rod 33 and the first drive rod 34 form a five-link structure to keep the backrest mounting plate 31 in the retracted position or the reclining position.

[0101] In the first embodiment, the rear end of the fourth linkage plate 224 is hinged to the second backrest rod 33. When the fourth linkage plate 224 rotates clockwise, the rear end of the fourth linkage plate 224 drives the second backrest rod 33 to move downward and forward, and the second backrest rod 33 drives the first link structure to move downward and forward as a whole. The hinge point of the first drive rod 34 and the first backrest rod 32 moves in a direction away from the bracket side plate 21. At this time, under the restriction of the second connecting rod structure, the first backrest rod 32 rotates counterclockwise relative to the second drive rod 35, and the angle between the first backrest rod 32 and the second drive rod 35 gradually increases. The first backrest rod 32 drives the front end of the backrest mounting plate 31 to tilt forward, causing the first connecting rod structure to deform. Under the pulling of the limiting rod 36, the distance between the hinge point of the first backrest rod 32 and the backrest mounting plate 31 and the hinge point of the second drive rod 35 and the limiting rod 36 gradually increases, so that the upper end of the second backrest rod 33 gradually approaches the first backrest rod 32, thereby causing the backrest mounting plate 31 to lean back.

[0102] In the first embodiment, the limit button 37 is arranged on the second backrest rod 33. When the backrest mounting plate 31 is located at the retracted position and the reclining position, the backrest mounting plate 31 abuts against the limit button 37. By arranging the limit button 37 on the second backrest rod 33, only one limit button 37 is needed to limit the backrest mounting plate 31 at two positions, which has the advantages of simple structure and easy processing.

[0103] Therefore, the seat bracket provided in Example 1 can not only realize the switching of the backrest mounting plate 31 between the retracted position and the reclining position, but also enable the front end of the backrest mounting plate 31 to move forward, and the distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21 gradually decreases, so that the front end of the backrest mounting plate 31 is closer to the seat frame of the bracket side plate 21, thereby reducing the gap between the backrest part and the seat part, eliminating the risk of objects falling or being pinched, and improving the user experience of the sofa.

[0104] like Figures 12 to 21As shown, the second embodiment of the present invention provides a seat bracket. The difference between the second embodiment and the first embodiment is that in the second embodiment, the backrest rod group also includes a third backrest rod 38, the first backrest rod 32 is hinged to the third backrest rod 38, one of the upper ends of the first backrest rod 32 and the upper ends of the second backrest rod 33 is hinged to the front end of the backrest mounting plate 31, the other of the upper ends of the first backrest rod 32 and the second backrest rod 33 is hinged to the rear end of the backrest mounting plate 31, the rear end of the first drive rod 34 and the rear end of the second drive rod 35 are hinged to the lower end of the third backrest rod 38 and the lower end of the second backrest rod 33, the first backrest rod 32, the third backrest rod 38, the other of the first drive rod 34 and the second drive rod 35, the second backrest rod 33 and the backrest mounting plate 31 together form a first connecting rod structure, and a movable hinge end is provided on the first connecting rod structure, and the rear end of the first drive rod 34 and the other of the rear ends of the second drive rod 35 are hinged to the movable hinge end. With the above-mentioned seat bracket, when the second link structure is deformed, the first drive rod 34 or the second drive rod 35 can drive the first link structure to be deformed, so that the backrest mounting plate 31 is tilted back.

[0105] It should be noted that no matter whether the second drive rod 35 or the first drive rod 34 is hinged to the linkage assembly 22, as long as the backrest rod group can be moved downward and forward when the linkage assembly 22 moves. In this embodiment, in order to facilitate the arrangement of each connecting rod, the front end of the second drive rod 35 is hinged to the bracket side plate 21, and the front end of the first drive rod 34 is hinged to the linkage assembly 22.

[0106] In the second embodiment, the first backrest rod 32 , the backrest mounting plate 31 , the second backrest rod 33 , the second driving rod 35 and the third backrest rod 38 form a five-link structure, and the forward tilt of the backrest mounting plate 31 is achieved by deforming the five-link structure.

[0107] The movable hinge end can be arranged on the first backrest rod 32 or on the upper end of the third backrest rod 38. In this case, the middle part of the third backrest rod 38 is hinged to the lower end of the first backrest rod 32. As long as the deformation of the five-link structure can be achieved through the movable hinge end, it will be fine.

[0108] Furthermore, the upper end of the first backrest rod 32 may be hinged to the front end of the backrest mounting plate 31, and in this case, the upper end of the second backrest rod 33 is hinged to the rear end of the backrest mounting plate 31. Alternatively, the upper end of the first backrest rod 32 is hinged to the rear end of the backrest mounting plate 31, and the upper end of the second backrest rod 33 is hinged to the front end of the backrest mounting plate 31. As long as the front end of the backrest mounting plate 31 can be tilted forward, it will be fine.

[0109] like Fig.17 and Fig.19As shown, the movable hinge end is the lower end of the first backrest rod 32, the middle part of the first backrest rod 32 is hinged to the upper end of the third backrest rod 38, the first drive rod 34 is hinged to the second drive rod 35, and the first drive rod 34, the second drive rod 35, the first backrest rod 32 and the third backrest rod 38 form a third connecting rod structure. With the above structure, when the second connecting rod structure is deformed, the first drive rod 34 can rotate clockwise relative to the second drive rod 35, thereby driving the third connecting rod structure to deform, so that the first drive rod 34 can drive the first backrest rod 32 to rotate counterclockwise, thereby realizing the forward tilt of the front end of the backrest mounting plate 31.

[0110] like Fig.17 As shown, the front end of the second driving rod 35 is hinged to the bracket side plate 21, the middle part of the first driving rod 34 is hinged to the middle front part of the second driving rod 35, the lower end of the third backrest rod 38 is hinged to the middle rear part of the second driving rod 35, the lower end of the second backrest rod 33 is hinged to the rear end of the second driving rod 35, and the lower end of the first driving rod 34 is hinged to the linkage assembly 22. With the above structure, the backrest rod group is connected to the linkage mechanism through the front end of the second driving rod 35, so that the linkage mechanism can drive the backrest rod group to move.

[0111] Among them, the first connecting rod structure formed by the backrest rod group and the backrest mounting plate 31 is hinged on the bracket side plate 21 by using the second driving rod 35, instead of the backrest mounting plate 31 being directly hinged on the bracket side plate 21. The design allows the front end of the backrest mounting plate 31 to move forward a greater distance when lying down, thereby realizing the zero wall-leaning function.

[0112] In the second embodiment, the rear end of the fourth linkage plate 224 is hinged to the lower end of the first drive rod 34. When the fourth linkage plate 224 rotates clockwise, the second link structure is deformed, and the rear end of the fourth linkage plate 224 drives the first drive rod 34 to move downward and forward. The first drive rod 34 drives the second drive rod 35 hinged thereto to rotate clockwise relative to the bracket side plate, thereby moving the backrest rod group and the backrest mounting plate 31 forward and downward. And because the distance between the first hinge end and the third hinge end increases, the first drive rod 34 rotates clockwise relative to the second drive rod 35, the third link structure is deformed, and the first drive rod 34 drives the first backrest rod 32 to rotate counterclockwise relative to the third backrest rod, so that the upper end of the first backrest rod 32 tilts forward, and drives the front end of the backrest mounting plate 31 to tilt forward. At this time, the first connecting rod structure is deformed, and the distance between the hinge point between the first backrest rod 32 and the backrest mounting plate 31 and the hinge point between the second backrest rod 33 and the second driving rod 35 gradually increases, causing the backrest mounting plate 31 to lean back.

[0113] In the second embodiment, the limit button 37 is arranged on the first backrest rod 32. When the backrest mounting plate 31 is located at the retracted position and the reclining position, the backrest mounting plate 31 abuts against the limit button 37. By arranging the limit button 37 on the first backrest rod 32, only one limit button 37 is needed to limit the backrest mounting plate 31 at two positions, which has the advantages of simple structure and easy processing.

[0114] Therefore, the seat bracket provided in the second embodiment can not only realize the switching of the backrest mounting plate 31 between the retracted position and the reclining position, but also enable the front end of the backrest mounting plate 31 to move forward, and the distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21 gradually decreases, so that the front end of the backrest mounting plate 31 is closer to the seat frame of the bracket side plate 21, thereby reducing the gap between the backrest part and the seat part, eliminating the risk of objects falling or being pinched, and improving the user experience of the sofa.

[0115] It should be noted that the rotation directions of the various components of the present invention correspond to Figure 2 Side view of the seat support from perspective.

[0116] Another embodiment of the present application provides a zero-wall-rest seat, which includes the seat bracket provided above. Since the front and rear ends of the backrest mounting plate 31 are respectively hinged to the bracket side plate 21 and the linkage assembly 22 through the backrest rod group, the linkage mechanism 20 can switch the backrest mounting plate 31 between the retracted position and the reclining position through the backrest rod group. In addition, when the backrest mounting plate 31 switches between the retracted position and the reclining position, the distance between point F and the seat frame mounting surface of the bracket side plate 21 is within a preset size range, so that the movement trajectory of point F can be within the range of movement of the human waist, so that the movement range of the human waist relative to the seat frame mounting surface is very small, and then when the seat bracket moves, the movement of the human waist relative to the seat frame mounting surface is reduced, so that the movement displacement of the human back relative to the backrest mounting plate 31 is very small, producing an "anti-rubbing back" effect, thereby improving the user experience when using it.

[0117] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0118] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0119] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0120] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0121] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0122] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A seat bracket, characterized in that: The seat support comprises: The linkage mechanism (20) comprises a bracket side plate (21) and a linkage assembly (22), wherein the bracket side plate (21) has a seat frame mounting surface, and the linkage assembly (22) is hingedly connected to the bracket side plate (21); A backrest mechanism (30) comprises a backrest mounting plate (31) and a backrest rod group, wherein the front end of the backrest mounting plate (31) and the rear end of the backrest mounting plate (31) are respectively hinged to the bracket side plate (21) and the linkage assembly (22) through the backrest rod group, and the backrest mounting plate (31) has a recovery position for recovering relative to the bracket side plate (21) and a reclining position for tilting backward relative to the bracket side plate (21), and the linkage mechanism (20) can drive the backrest mounting plate (31) to switch between the recovery position and the reclining position through the backrest rod group; Wherein, when the backrest mounting plate (31) is located at the recovery position, the rear end of the backrest mounting plate (31) is located at point A, and the front end of the backrest mounting plate (31) is located at point B; when the backrest mounting plate (31) is located at the reclining position, the rear end of the backrest mounting plate (31) is located at point C, and the front end of the backrest mounting plate (31) is located at point D; the line connecting point A and point C is line L1, the line connecting point B and point D is line L2, and the intersection of the vertical center line of line L1 and the vertical center line of line L2 is point F; when the backrest mounting plate (31) switches between the recovery position and the reclining position, the distance between point F and the seat frame mounting surface is within a preset size range, so that the movement trajectory of point F is within the range of motion of the human waist.

2. The seat support according to claim 1, characterized in that: The preset size is between 78 mm and 239 mm; or, The preset size is between 78 mm and 217 mm; or, The preset size is between 100 mm and 239 mm.

3. The seat support according to claim 1, characterized in that: The distance between the point F and the center line of the backrest mounting plate (31) is between 80 mm and 320 mm.

4. The seat support according to claim 1, characterized in that: The backrest rod group comprises a first backrest rod (32), a second backrest rod (33), a first driving rod (34) and a second driving rod (35). The upper end of the first backrest rod (32) and the upper end of the second backrest rod (33) are respectively hinged to the front end of the backrest mounting plate (31) and the rear end of the backrest mounting plate (31); one of the rear ends of the first driving rod (34) and the second driving rod (35) is hinged to the lower end of the first backrest rod (32) and the lower end of the second backrest rod (33); one of the first driving rod (34) and the second driving rod (35), the first backrest rod (32), the second backrest rod (33) and the backrest mounting plate (31) form a first connecting rod structure; the rear end of the first driving rod (34) and the other of the rear ends of the second driving rod (35) are hinged to the first connecting rod structure to deform the first connecting rod structure; One of the front ends of the first driving rod (34) and the second driving rod (35) is hinged to the bracket side plate (21), and the other of the front ends of the first driving rod (34) and the second driving rod (35) is hinged to the linkage assembly (22). The first driving rod (34), the second driving rod (35), the bracket side plate (21) and the linkage assembly (22) form a second connecting rod structure.

5. The seat support according to claim 4, characterized in that: The upper end of the first backrest rod (32) is hinged to the front end of the backrest mounting plate (31), the upper end of the second backrest rod (33) is hinged to the rear end of the backrest mounting plate (31), the lower end of the first backrest rod (32) is hinged to the middle part of the first drive rod (34), the lower end of the second backrest rod (33) is hinged to the rear end of the first drive rod (34), the front end of the first drive rod (34) is hinged to the linkage assembly (22), the front end of the second drive rod (35) is hinged to the bracket side plate (21), and the rear end of the second drive rod (35) is hinged to the first connecting rod structure. The backrest mechanism (30) also includes a limit rod (36) for keeping the backrest mounting plate (31) in the recovery position or the reclining position.

6. The seat support according to claim 5, characterized in that: The middle part of the second driving rod (35) is hinged to the middle part of the first backrest rod (32), the front end of the limiting rod (36) is hinged to the rear end of the second driving rod (35), and the rear end of the limiting rod (36) is hinged to the middle part of the second backrest rod (33).

7. The seat support according to claim 4, characterized in that: The backrest rod group also includes a third backrest rod (38), the first backrest rod (32) is hinged to the third backrest rod (38), one of the upper ends of the first backrest rod (32) and the second backrest rod (33) is hinged to the front end of the backrest mounting plate (31), the other of the upper ends of the first backrest rod (32) and the second backrest rod (33) is hinged to the rear end of the backrest mounting plate (31), the rear end of the first driving rod (34) and the rear end of the second driving rod (35) are hinged to the rear end of the backrest mounting plate (31), and the third backrest rod (38) is hinged to the first backrest rod (32) and the second backrest rod (33) One is hinged to the lower end of the third backrest rod (38) and the lower end of the second backrest rod (33); the first backrest rod (32), the third backrest rod (38), the first drive rod (34), the other of the second drive rod (35), the second backrest rod (33) and the backrest mounting plate (31) together form a first connecting rod structure; a movable hinge end is provided on the first connecting rod structure; the rear end of the first drive rod (34) and the other of the rear end of the second drive rod (35) are hinged to the movable hinge end.

8. The seat support according to claim 7, characterized in that: The movable hinge end is the lower end of the first backrest rod (32), the middle part of the first backrest rod (32) is hinged to the upper end of the third backrest rod (38), the first driving rod (34) is hinged to the second driving rod (35), and the first driving rod (34), the second driving rod (35), the first backrest rod (32) and the third backrest rod (38) form a third connecting rod structure.

9. The seat support according to claim 8, characterized in that: The front end of the second driving rod (35) is hinged to the bracket side plate (21), the middle part of the first driving rod (34) is hinged to the middle front part of the second driving rod (35), the lower end of the third backrest rod (38) is hinged to the middle rear part of the second driving rod (35), the lower end of the second backrest rod (33) is hinged to the rear end of the second driving rod (35), and the lower end of the first driving rod (34) is hinged to the linkage assembly (22).

10. The seat support according to claim 1, characterized in that The backrest mechanism (30) further comprises a limit button (37), and the limit button (37) is arranged on at least one of the backrest mounting plate (31) and the backrest rod group, and the limit button (37) can abut against one of the backrest mounting plate (31) and the backrest rod group to keep the backrest mounting plate (31) in the retracted position or the reclining position.

11. The seat support according to claim 10, characterized in that: An arc-shaped groove (311) is provided at the lower end of the backrest mounting plate (31); when the backrest mounting plate (31) is located at the recovery position, the limit button (37) abuts against the front end of the arc-shaped groove (311); when the backrest mounting plate (31) moves to the reclining position, the limit button (37) moves backward relative to the arc-shaped groove (311) and abuts against the arc-shaped groove (311).

12. The seat support according to claim 4, characterized in that: When the backrest mounting plate (31) is located at the reclining position, the included angle between the first backrest rod (32) and the seat frame mounting surface of the bracket side plate (21) is an acute angle.

13. The seat support according to claim 1, characterized in that When the backrest mounting plate (31) is switched from the retracted position to the reclining position, the rotation angle of the backrest mounting plate (31) relative to the seat frame mounting surface of the bracket side plate (21) is between 30° and 38°.

14. The seat support according to claim 1, characterized in that When the backrest mounting plate (31) is located at the retracted position, the distance between the front end of the backrest mounting plate (31) and the ground is between 328 mm and 380 mm.

15. The seat support according to claim 1, characterized in that The seat support also includes a base (10); the linkage assembly (22) includes a first linkage plate (221), a second linkage plate (222), a third linkage plate (223), a fourth linkage plate (224) and a fifth linkage plate (225); the lower end of the first linkage plate (221) is hinged to the base (10); the upper end of the first linkage plate (221) is hinged to the front end of the second linkage plate (222); the rear end of the second linkage plate (222) is hinged to the support side plate (21); and the third linkage plate (223) is hinged to the front end of the second linkage plate (224). The front end of the third linkage plate (223) is hinged to the middle part of the second linkage plate (222), the rear end of the third linkage plate (223) is hinged to the front end of the fourth linkage plate (224), the lower end of the fourth linkage plate (224) is hinged to the lower end of the bracket side plate (21), the rear end of the fourth linkage plate (224) is hinged to the backrest rod group, the upper end of the fourth linkage plate (224) is hinged to the upper end of the fifth linkage plate (225), and the lower end of the fifth linkage plate (225) is hinged to the base (10); The seat support also includes an anti-tilt mechanism (40), which includes a first anti-tilt rod (41) and a second anti-tilt rod (42), the upper end of the first anti-tilt rod (41) is hinged to the upper end of the second anti-tilt rod (42), the middle part of the first anti-tilt rod (41) is hinged to the front end of the linkage assembly (22), the lower end of the second anti-tilt rod (42) is hinged to the base (10), and when the backrest mounting plate (31) is in the reclining position, the lower end of the first anti-tilt rod (41) is in contact with the ground.

16. The seat support according to claim 15, characterized in that The seat support further comprises a driving mechanism (50), wherein the driving mechanism (50) comprises a driving member, a slider (51), a driving connecting rod (52) and a transmission rod (53), wherein the driving member is drivingly connected to the slider (51) to drive the slider (51) to move along the front-rear direction of the base (10), the driving connecting rod (52) extends along the front-rear direction of the base (10), the transmission rod (53) extends along the left-right direction of the base (10), the slider (51) is hinged to the lower end of the driving connecting rod (52), and the The upper end of the driving connecting rod (52) is hinged to the transmission rod (53), and the transmission rod (53) is drivingly connected to the bracket side plate (21). When the driving member drives the slider (51) to slide, the slider (51) can drive the driving connecting rod (52) to rotate, thereby causing the transmission rod (53) to move forward and upward. The transmission rod (53) drives the backrest mounting plate (31) to move from the recovery position to the reclining position through the bracket side plate (21) and the linkage assembly (22); and / or, The seat support also includes a footrest assembly (60), and the footrest assembly (60) includes an inner bench board (61), an outer bench board (62), a front bench board (63), a rear bench board (64), a first front bench connecting rod (65), a second front bench connecting rod (66), a rear bench connecting rod (67), a front footrest (68) and a rear footrest (69), the rear end of the outer bench board (62) is hinged to the support side board (21), the front end of the outer bench board (62) is hinged to the rear end of the rear bench board (64), the rear end of the inner bench board (61) is hinged to the support side board (21), the front end of the inner bench board (61) is hinged to the rear end of the front bench board (63), and the middle part of the inner bench board (61) is hinged to the rear end of the front bench board (63). It is hinged to the middle part of the rear bench board (64), the rear end of the first front bench connecting rod (65) is hinged to the middle part of the rear bench board (64), the middle part of the first front bench connecting rod (65) is hinged to the middle part of the front bench board (63), the front end of the first front bench connecting rod (65) is hinged to the rear end of the second front bench connecting rod (66), the front footrest (68) is respectively hinged to the front end of the front bench board (63) and the front end of the second front bench connecting rod (66), the lower end of the rear bench connecting rod (67) is hinged to the middle part of the second front bench connecting rod (66), and the rear footrest (69) is respectively hinged to the front end of the rear bench board (64) and the upper end of the rear bench connecting rod (67).

17. A zero-wall chair, characterized in that: The zero-wall seat comprises a seat support as claimed in any one of claims 1 to 16.

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