Backrest mechanism, seat support and zero-wall-leaning seat

Abstract

The utility model provides a backrest mechanism, a seat support and a zero-wall seat, and the backrest mechanism comprises a backrest mounting plate with a backward leaning position and a recovery position; the backrest rod group is hinged to the front end of the backrest mounting plate and the rear end of the backrest mounting plate, the backrest rod group and the backrest mounting plate form a first connecting rod structure, and the backrest rod group is provided with a first hinged end and a second hinged end; the lower end of the backrest driving rod is provided with a third hinged end, one of the first hinged end and the third hinged end is hinged to the support side plate, the other one of the first hinged end and the third hinged end is hinged to the linkage assembly, and the middle of the backrest driving rod is hinged to the backrest rod set. The support side plate, the linkage assembly, the backrest driving rod and the backrest rod set jointly form a second connecting rod structure, the upper end of the backrest driving rod is hinged to the second hinged end, and the backrest driving rod can rotate so that the backrest mounting plate can incline forwards. The problem that a movable sofa is poor in use experience can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a backrest mechanism, a seat bracket and a zero-wall seat. Background Art

[0002] A movable sofa is a common piece of furniture in our daily life, allowing people to adjust their posture according to their needs. A movable sofa usually includes two or three of the following postures: lying, TV, and sitting. Among them, a movable sofa has legs, a seat, and a backrest. By arranging soft padding on the corresponding structures, the sofa's soft seat, soft backrest, and soft footrest structures 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 known as 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, during the unfolding of the movable sofa, a gap may appear at the junction of the backrest and the seat due to the backward tilting of the backrest. The existence of this gap may cause items to fall into it or there is a risk of being pinched, thereby affecting the use and experience of the sofa. Utility Model Content

[0004] The utility model provides a backrest mechanism, a seat bracket and a zero-wall seat, so as to solve the problem of poor user experience of movable sofas in the related art.

[0005] According to one aspect of the utility model, a backrest mechanism is provided, the backrest mechanism comprising: a backrest mounting plate, having a reclining position tilted backward relative to the bracket side plate and a recovered position recovered relative to the bracket side plate; a backrest rod group, the backrest rod group is hinged to the front end of the backrest mounting plate and the rear end of the backrest mounting plate, the backrest rod group and the backrest mounting plate form a first connecting rod structure, the backrest rod group has a first hinge end and a second hinge end; a backrest driving rod, the lower end of the backrest driving rod has a third hinge end, one of the first hinge end and the third hinge end is hinged to the bracket side plate, the other of the first hinge end and the third hinge end is hinged to the linkage assembly, the middle part of the backrest driving rod is hingedly arranged on the backrest rod group, the bracket side plate, the linkage assembly, the backrest driving rod and the backrest rod group together form a second connecting rod structure, the upper end of the backrest driving rod is hinged to the second hinge end, and the backrest driving rod can rotate relative to the backrest rod group to tilt the backrest mounting plate forward through the second hinge end.

[0006] Furthermore, the backrest rod group includes a first backrest rod, a second backrest rod, a third backrest rod and a transition connecting rod. The first backrest rod is hinged to the third backrest rod. The upper end of the first backrest rod and one of the upper ends of the second backrest rod are hinged to the front end of the backrest mounting plate, the upper end of the first backrest rod and the other upper end of the second backrest rod are hinged to the rear end of the backrest mounting plate, the lower end of the third backrest rod and the lower end of the second backrest rod are both hinged to the transition connecting rod, and the first hinged end is arranged on the transition connecting rod.

[0007] Furthermore, the second hinged 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 backrest drive rod is hinged to the transition connecting rod, and the backrest drive rod, the transition connecting rod, the first backrest rod and the third backrest rod form a third connecting rod structure.

[0008] Furthermore, the first hinged end is the front end of the transition link, the middle part of the backrest drive rod is hinged to the middle front part of the transition link, the lower end of the third backrest rod is hinged to the middle rear part of the transition link, and the lower end of the second backrest rod is hinged to the rear end of the transition link.

[0009] Furthermore, the backrest mechanism also includes a limit button, and a limit button is provided on at least one of the first backrest rod, the third backrest rod, the second backrest rod and the backrest driving rod. The limit button can abut against one of the backrest mounting plate, the first backrest rod, the third backrest rod, the second backrest rod and the backrest driving rod to keep the backrest mounting plate in the retracted position or the reclining position.

[0010] Furthermore, a limit button is provided on the first backrest rod, and when the backrest mounting plate is located at the retracted position and the reclining position, the backrest mounting plate and the limit button are in contact with each other.

[0011] Furthermore, an arc-shaped groove is provided at the front end of the backrest mounting plate. When the backrest mounting plate is in the retracted position, the limit button abuts against the front end of the arc-shaped groove. When the backrest mounting plate is in the reclining position, the limit button abuts against the middle of the arc-shaped groove.

[0012] 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.

[0013] 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°.

[0014] Furthermore, 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.

[0015] According to another aspect of the present invention, a seat bracket is provided, which includes: a base; a linkage mechanism, including a bracket side panel and a linkage assembly, the linkage assembly is hinged to the base, and the bracket side panel is hingedly arranged on the linkage assembly; a backrest mechanism, one of the first hinged end of the backrest mechanism and the third hinged end of the backrest mechanism is hinged to the bracket side panel, and the other of the first hinged end of the backrest mechanism and the third hinged end of the backrest mechanism is hinged to the linkage assembly, and the backrest mechanism is the backrest mechanism provided above.

[0016] Furthermore, 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 bracket side plate, the front end of the third linkage plate is hinged to the middle 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 bracket side plate, and the rear end of the fourth linkage plate is hinged to the backrest mechanism. The third hinged end is hinged, 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; and / or, 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, and 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.

[0017] Furthermore, the seat bracket also includes a driving mechanism, which includes a driving member, a slider, a driving link and a driving rod. The driving member is connected to the slider to drive the slider to move along the front and rear direction of the base. The driving link extends along the front and rear direction of the base. The driving rod extends along the left and right direction of the base. The slider is hinged to the lower end of the driving link, and the upper end of the driving link is hinged to the driving rod. The driving rod is connected to the bracket side plate. In the process of the driving member driving the slider to slide, the slider can drive the driving link to rotate, thereby moving the driving rod forward and upward, and the driving rod drives the backrest mounting plate from the retracted position to the reclining position through the bracket side plate and the linkage assembly; and / or the seat bracket also includes a footstool assembly, which includes an inner bench board, an outer bench board, and a front bench board , rear bench board, the first front bench connecting rod, the second front bench connecting rod, the rear bench connecting rod, the front footstool and the 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, 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.

[0018] According to another aspect of the present invention, a zero-wall seat is provided, which includes the seat bracket provided above.

[0019] According to the technical solution of the present invention, the backrest mechanism includes a backrest mounting plate, a backrest rod group, and a backrest drive rod. When the backrest is tilted back and switched from the retracted position to the reclining position, the linkage assembly can tilt forward relative to the bracket side plate. Since one of the first hinge end and the third hinge end is hinged to the bracket side plate, the other of the first hinge end and the third hinge end is hinged to the linkage assembly, and the middle portion of the backrest drive rod is hingedly arranged on the backrest rod group, while the linkage assembly tilts forward, it can drive the first connecting rod structure downward and forward through the backrest drive rod or directly. In addition, the third hinge end is away from the first hinge end, causing the second connecting rod structure to deform, and the backrest drive rod rotates relative to the backrest rod group. The backrest drive rod drives the first connecting rod structure to deform through the second hinge end, causing the front end of the backrest mounting plate to tilt forward, and due to the downward movement of the backrest rod group, the backrest mounting plate rotates and tilts backward. The distance between the front end of the backrest mounting plate and the rear end of the bracket side panels gradually decreases, bringing the front end of the backrest mounting plate closer to the seat frame of the bracket side panels. This reduces the gap between the backrest and the seat, eliminating the risk of items falling or getting caught, and improving the user experience of the sofa. Furthermore, during the movement of the backrest mechanism, the range of motion of the human waist relative to the seat frame mounting surface is very small, reducing the movement of the waist relative to the seat frame mounting surface and minimizing the movement of the back relative to the backrest mounting plate, creating an "anti-back rubbing" effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of the seat support provided in accordance with an embodiment of the present invention when the seat support is in a TV posture is shown;

[0022] Figure 2 A schematic structural diagram of a seat support provided according to an embodiment of the present invention when the seat support is in a lying position is shown;

[0023] Figure 3 A schematic diagram of the structure of a seat support provided according to an embodiment of the present invention when the seat support is in a sitting position is shown;

[0024] Figure 4 A schematic diagram of the structure of the seat support provided in accordance with an embodiment of the present invention when the seat support is in a TV posture is shown;

[0025] Figure 5 A schematic structural diagram of a seat support provided according to an embodiment of the present invention when the seat support is in a lying position is shown;

[0026] Figure 6A partial schematic diagram of a seat support provided according to an embodiment of the present invention when in a TV posture is shown;

[0027] Figure 7 A partial schematic diagram of a seat support provided according to an embodiment of the present invention when in a lying position is shown;

[0028] Figure 8 A partial schematic diagram of a seat support provided according to an embodiment of the present invention when in a TV posture is shown;

[0029] Figure 9 A partial schematic diagram of a seat support provided according to an embodiment of the present invention when in a lying position is shown;

[0030] Figure 10 A comparison diagram of three postures of a seat bracket provided according to an embodiment of the present utility model is shown.

[0031] The above drawings include the following reference numerals:

[0032] 10. Base;

[0033] 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 drive rod; 25. Second drive rod; 26. Third drive rod;

[0034] 30. Backrest mechanism; 31. Backrest mounting plate; 311. Arc groove; 32. First backrest rod; 33. Second backrest rod; 34. Backrest drive rod; 35. Transition connecting rod; 37. Limit button; 38. Third backrest rod;

[0035] 40. Anti-tilt mechanism; 41. First anti-tilt bar; 42. Second anti-tilt bar;

[0036] 50. Driving mechanism; 51. Slider; 52. Driving connecting rod; 53. Driving rod; 54. Front driving plate;

[0037] 60. Footrest 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 footrest; 69. Rear footrest. DETAILED DESCRIPTION

[0038] 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 embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way 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 making creative efforts are within the scope of protection of the present invention.

[0039] like Figures 1 to 10 As shown, the embodiment of the present invention provides a backrest mechanism, which includes a backrest mounting plate 31, a backrest rod group, and a backrest driving rod 34. The backrest mounting plate 31 has a reclining position tilted backward relative to the bracket side plate 21 and a recovered position recovered relative to the bracket side plate 21; the backrest rod group is hinged to the front end of the backrest mounting plate 31 and the rear end of the backrest mounting plate 31, and the backrest rod group and the backrest mounting plate 31 form a first connecting rod structure, and the backrest rod group has a first hinge end and a second hinge end; the lower end of the backrest driving rod 34 has a first hinge end and a second hinge end. Three hinged ends, one of the first hinged end and the third hinged end is hinged to the bracket side panel 21, and the other of the first hinged end and the third hinged end is hinged to the linkage assembly 22. The middle part of the backrest drive rod 34 is hingedly set on the backrest rod group. The bracket side panel 21, the linkage assembly 22, the backrest drive rod 34 and the backrest rod group together form a second connecting rod structure. The upper end of the backrest drive rod 34 is hinged to the second hinged end. The backrest drive rod 34 can rotate relative to the backrest rod group to tilt the backrest mounting plate 31 forward through the second hinged end.

[0040] According to the technical solution of the present invention, the backrest mechanism includes a backrest mounting plate 31, a backrest rod assembly, and a backrest drive rod 34. When the backrest is tilted back and switched from the retracted position to the reclining position, the linkage assembly 22 can tilt forward relative to the bracket side plate 21. Since one of the first hinge end and the third hinge end is hinged to the bracket side plate 21, the other of the first hinge end and the third hinge end is hinged to the linkage assembly 22, and the middle portion of the backrest drive rod 34 is hingedly arranged on the backrest rod assembly, while the linkage assembly 22 tilts forward, it can drive the first link structure downward and forward through the backrest drive rod 34 or directly. In addition, the third hinge end moves away from the first hinge end, causing the second link structure to deform, causing the backrest drive rod 34 to rotate relative to the backrest rod assembly. The backrest drive rod 34 drives the first link structure to deform via the second hinge end, causing the front end of the backrest mounting plate 31 to tilt forward. Due to the downward movement of the backrest rod assembly, the backrest mounting plate 31 rotates and tilts backward. 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 items falling or being pinched, and improving the user experience of the sofa.

[0041] 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.

[0042] When the backrest is reclined, the linkage assembly 22 can not only tilt forward relative to the bracket side plate 21, but also the rear end of the linkage assembly 22 can rotate clockwise, thereby driving the connecting rod hinged thereto to move downward and forward.

[0043] like Figure 1 、 Figure 6 as well as Figure 8 As shown, the backrest rod assembly includes a first backrest rod 32, a second backrest rod 33, a third backrest rod 38, and a transition link 35. The first backrest rod 32 and the third backrest rod 38 are hingedly connected. One of the upper ends of the first backrest rod 32 and the upper ends of the second backrest rod 33 is hingedly connected to the front end of the backrest mounting plate 31, and the other of the upper ends of the first backrest rod 32 and the second backrest rod 33 is hingedly connected to the rear end of the backrest mounting plate 31. The lower ends of the third backrest rod 38 and the lower ends of the second backrest rod 33 are both hingedly connected to the transition link 35, and the first hinged end is provided on the transition link 35. With the backrest rod assembly of the above structure, the first backrest rod 32, the backrest mounting plate 31, the second backrest rod 33, the transition link 35, and the third backrest rod 38 can form a five-link structure. By deforming the five-link structure, the backrest mounting plate 31 can be tilted forward.

[0044] Among them, the first connecting rod structure formed by the backrest rod group and the backrest mounting plate 31 is hinged to the bracket side plate 21 by using the transition connecting rod 35, instead of 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 when lying down, thereby realizing the zero wall-leaning function.

[0045] It should be noted that whether the transition link 35 or the backrest drive rod 34 is hinged to the linkage assembly 22, it is sufficient as long as the backrest rod assembly can move downward and forward when the linkage assembly 22 moves. In this embodiment, to facilitate the arrangement of the respective links, the front end of the transition link 35 is hinged to the bracket side plate 21, and the front end of the backrest drive rod 34 is hinged to the linkage assembly 22.

[0046] The second hinged end can be provided on either the first backrest rod 32 or the upper end of the third backrest rod 38. In this case, the middle portion of the third backrest rod 38 is hinged to the lower end of the first backrest rod 32. Any configuration is sufficient as long as the five-link structure can be deformed through the second hinged end.

[0047] Furthermore, the upper end of the first backrest rod 32 can be hinged to the front end of the backrest mounting plate 31, while 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 can be hinged to the rear end of the backrest mounting plate 31, while the upper end of the second backrest rod 33 is hinged to the front end of the backrest mounting plate 31. Any arrangement is acceptable as long as the front end of the backrest mounting plate 31 can be tilted forward.

[0048] like Figure 1 and Figure 6 As shown, the second hinged end is the lower end of the first backrest rod 32, the middle portion of the first backrest rod 32 is hingedly connected to the upper end of the third backrest rod 38, and the backrest drive rod 34 is hingedly connected to the transition link 35. The backrest drive rod 34, the transition link 35, the first backrest rod 32, and the third backrest rod 38 form a third linkage structure. By configuring the third linkage structure as the aforementioned four-link structure, the clockwise rotation of the backrest drive rod 34 relative to the transition link 35 can cause the third linkage structure to deform, thereby driving the first backrest rod 32 to rotate counterclockwise relative to the third backrest rod 38, thereby achieving deformation of the first linkage structure.

[0049] like Figure 1 and Figure 2 As shown, the first hinged end is the front end of the transition link 35, the middle portion of the backrest drive rod 34 is hinged to the middle front portion of the transition link 35, the lower end of the third backrest rod 38 is hinged to the middle rear portion of the transition link 35, and the lower end of the second backrest rod 33 is hinged to the rear end of the transition link 35. With this structure, the backrest rod assembly is connected to the linkage mechanism via the front end of the transition link 35, thereby enabling the linkage mechanism to drive the movement of the backrest rod assembly.

[0050] like Figure 1 As shown, the backrest mechanism further includes a limit button 37, which is provided on at least one of the first backrest rod 32, the third backrest rod 38, the second backrest rod 33, and the backrest drive rod 34. The limit button 37 can abut against one of the backrest mounting plate 31, the first backrest rod 32, the third backrest rod 38, the second backrest rod 33, and the backrest drive rod 34 to maintain the backrest mounting plate 31 in the retracted position or the reclining position. The structure of using the limit button 37 to limit the backrest mounting plate 31 in the retracted position or the reclining position has the advantages of being simple in structure and easy to set up.

[0051] The number of limit buttons 37 can be one or more. The limit button 37 can be installed on any connecting rod of the backrest mechanism, as long as the limit button 37 abuts the backrest mounting plate 31 when the backrest mounting plate 31 is in the retracted position or the reclining position. If there are two limit buttons 37, the two limit buttons 37 can abut different connecting rods in the retracted position or the reclining position, respectively.

[0052] like Figure 1 As shown, the limit button 37 is provided on the first backrest rod 32. When the backrest mounting plate 31 is in the retracted position and the reclining position, the backrest mounting plate 31 abuts against the limit button 37. By providing the limit button 37 on the first backrest rod 32, only one limit button 37 is required to limit the backrest mounting plate 31 in two positions, which has the advantages of simple structure and easy processing.

[0053] like Figure 1 and Figure 6 As shown, the front end of the backrest mounting plate 31 is provided with an arcuate groove 311. When the backrest mounting plate 31 is in the retracted position, the limit button 37 abuts the front end of the arcuate groove 311. When the backrest mounting plate 31 is in the reclining position, the limit button 37 abuts the middle portion of the arcuate groove 311. With this structure, when the backrest mounting plate 31 rotates, the arcuate groove 311 allows the backrest mounting plate 31 to avoid rotation, thereby ensuring smooth rotation of the backrest mounting plate 31.

[0054] 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 portion thereof.

[0055] like Figure 9As shown, when the backrest mounting plate 31 is in the reclining position, the angle A formed between the first backrest rod 32 and the seat frame mounting surface of the bracket side plate 21 is an acute angle. This acute angle structure allows the front end of the backrest mounting plate 31 to be closer to the seat frame mounting surface, thereby reducing the distance between the bracket side plate 21 and the backrest mounting plate 31. This allows for zero clearance between the seat and backrest soft padding after the soft padding is installed. This zero clearance also prevents the user's shirt from being pulled out due to improper relative displacement between the backrest and seat when the seat is unfolded, thereby providing a comfortable, anti-back rubbing experience.

[0056] Among them, the angle A 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 backrest drive rod 34 and the seat frame mounting surface.

[0057] In this embodiment, when the backrest mounting plate 31 is switched from the retracted position to the reclined 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°. This angle range allows the backrest mounting plate 31 to have a larger recline angle, enabling the backrest to meet the zero-gravity wall requirement. Furthermore, the reduced height of this backrest allows the backrest to be lowered, making the zero-gravity function more pronounced and providing a better user experience.

[0058] 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°.

[0059] 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.

[0060] like Figure 8 As shown, when the backrest mounting plate 31 is in the retracted position, the distance B between the front end of the backrest mounting plate 31 and the ground is between 328mm and 380mm. Using this dimension range, after the backrest is installed and in a sitting position, the distance between the highest point of the backrest and the ground can reach 965mm, which helps to increase the height of the backrest mounting plate 31, thereby achieving a higher zero-wall backrest and a taller, more comfortable backrest.

[0061] 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.

[0062] The distance 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.

[0063] 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.

[0064] 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.

[0065] Another embodiment of the present invention provides a seat bracket, which includes a base 10, a linkage mechanism 20, and a backrest mechanism 30. The linkage mechanism 20 includes a bracket side panel 21 and a linkage assembly 22. The linkage assembly 22 is hinged to the base 10, and the bracket side panel 21 is hingedly set on the linkage assembly 22; one of the first hinged end of the backrest mechanism 30 and the third hinged end of the backrest mechanism 30 is hinged to the bracket side panel 21, and the other of the first hinged end of the backrest mechanism 30 and the third hinged end of the backrest mechanism 30 is hinged to the linkage assembly 22. The backrest mechanism 30 is the backrest mechanism 30 provided above. When the backrest is tilted back and switched from the retracted position to the reclining position, the linkage assembly 22 can tilt forward relative to the bracket side panel 21. Since one of the first hinged end and the third hinged end is hinged to the bracket side panel 21, and the other of the first hinged end and the third hinged end is hinged to the linkage assembly 22, and the middle portion of the backrest drive rod 34 is hingedly disposed on the backrest rod assembly, while the linkage assembly 22 tilts forward, it can drive the first connecting rod structure downward and forward through the backrest drive rod 34 or directly. In addition, the third hinged end moves away from the first hinged end, causing the second connecting rod structure to deform, causing the backrest drive rod 34 to rotate relative to the backrest rod assembly. The backrest drive rod 34 drives the first connecting rod structure to deform via the second hinged end, causing the front end of the backrest mounting plate 31 to tilt forward. As the backrest rod assembly moves downward, the backrest mounting plate 31 rotates and tilts backward. 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 items falling or being pinched, and improving the user experience of the sofa.

[0066] like Figure 1 and Figure 3As shown, the seat frame also includes an anti-tilt mechanism 40, which includes a first anti-tilt bar 41 and a second anti-tilt bar 42. The upper end of the first anti-tilt bar 41 is hinged to the upper end of the second anti-tilt bar 42, the middle portion of the first anti-tilt bar 41 is hinged to the front end of the linkage assembly 22, and the lower end of the second anti-tilt bar 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 bar 41 contacts the ground. With this anti-tilt mechanism 40, in the reclining position, the first anti-tilt bar 41 contacts the ground to provide support, thereby providing support for the seat frame and reducing the risk of the seat frame tipping forward in zero gravity.

[0067] In this embodiment, a roller is provided at the lower end of the first anti-roll bar 41 , and in the lying state, the roller is in contact with the ground.

[0068] like Figure 6 and Figure 7 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 third hinged end, 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. Using the above-mentioned linkage assembly 22, when the seat switches from the TV position to the lying position, 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 drive rod to move downward.

[0069] The middle portion of the first anti-roll bar 41 is hinged to the first linkage plate 221 .

[0070] Specifically, when the fourth linkage plate 224 rotates clockwise, the second linkage structure deforms. The rear end of the fourth linkage plate 224 drives the backrest drive rod 34 downward and forward. The backrest drive rod 34 then rotates the transition link 35, to which it is hinged, clockwise relative to the bracket side plate, thereby moving the backrest rod assembly and the backrest mounting plate 31 forward and downward. Furthermore, as the distance between the first and third hinged ends increases, the backrest drive rod 34 rotates clockwise relative to the transition link 35, deforming the third linkage structure. The backrest drive rod 34 drives the first backrest rod 32 counterclockwise relative to the third backrest rod, causing the upper end of the first backrest rod 32 to tilt forward and the front end of the backrest mounting plate 31 to tilt forward. At this point, the first linkage structure deforms, and the distance between the hinge points of the first backrest rod 32 and the backrest mounting plate 31, and the hinge points of the second backrest rod 33 and the transition link 35, gradually increases, causing the backrest mounting plate 31 to tilt backward.

[0071] like Figures 2 to 4 As shown, the seat bracket also includes a driving mechanism 50, which includes a driving member, a slider 51, a driving link 52 and a driving rod 53. The driving member is driven and connected to the slider 51 to drive the slider 51 to move along the front and rear directions of the base 10. The driving link 52 extends along the front and rear directions of the base 10, and the driving rod 53 extends along the left and right directions 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 driving rod 53. The driving rod 53 is driven and 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 driving rod 53 forward and upward, and the driving 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 driving rod 53 to move forward and upward, and then the driving 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.

[0072] Specifically, the bracket side plate 21 has a through hole provided therethrough, and the driving rod 53 passes through the through hole.

[0073] like Figure 1 and Figure 5As shown, the seat bracket 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 bracket side panel 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 bracket side panel 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 bracket side panel 21. It is hinged to the middle part of the rear bench board 64, the rear end of the first front bench link 65 is hinged to the middle part of the rear bench board 64, the middle part of the first front bench link 65 is hinged to the middle part of the front bench board 63, the front end of the first front bench link 65 is hinged to the rear end of the second front bench link 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 link 66 respectively, the lower end of the rear bench link 67 is hinged to the middle part of the second front bench link 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 link 67 respectively.

[0074] 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.

[0075] Wherein, the driving component is a linear motor.

[0076] In this embodiment, in the electric scheme, the drive mechanism 50 further includes a front drive plate 54, the two ends of which are respectively hinged to the drive rod 53 and the outer bench plate 62. In the non-electric scheme, the linkage mechanism 20 further includes a first drive rod 24, a second drive rod 25, and a third drive rod 26. The front end of the first drive rod 24 is hinged to the middle part of the first linkage plate 221, the rear end of the first drive rod 24 is hinged to the upper end of the second drive rod 25, the middle part of the second drive rod 25 is hinged to the bracket side plate 21, the lower end of the second drive rod 25 is hinged to the rear end of the third drive rod 26, and the front end of the third drive rod 26 is hinged to the outer bench plate 62.

[0077] As the driving member drives the slider 51 to slide, the slider 51 can drive the driving connecting rod 52 to rotate, thereby driving the driving rod 53 to rotate. The driving 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. The outer bench plate 62 drives the rear bench plate 64 to extend. The rear bench plate 64 drives the inner bench plate 61 to extend. The inner bench plate 61 drives the front bench plate 63 to extend. The four-bar linkage 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. The rear bench plate 64 and the rear bench connecting rod 67 jointly drive the rear footrest 69 to extend, causing the footrest assembly 60 to switch from the retracted position to the extended position. The retraction process of the footrest assembly 60 is the opposite of the above process and will not be repeated here.

[0078] 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 drive rod 24 to move backward, thereby driving the second drive rod 25 to rotate relative to the bracket side plate 21, the upper end of the second drive rod 25 moves backward, and the front end moves forward. The second drive rod 25 drives the third drive rod 26 forward, thereby causing the footrest assembly 60 to extend.

[0079] 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.

[0080] It should be noted that the rotation direction of each component of the present invention corresponds to Figure 1 Side view of the seat support from perspective.

[0081] Another embodiment of the present application provides a zero-wall-rest chair, comprising the seat frame provided above. When the backrest is reclined and switched from a retracted position to a reclined position, the linkage assembly 22 can tilt forward relative to the frame side panel 21. Because one of the first hinged end and the third hinged end is hinged to the frame side panel 21, and the other of the first hinged end and the third hinged end is hinged to the linkage assembly 22, and the middle portion of the backrest drive rod 34 is hingedly mounted on the backrest rod assembly, while the linkage assembly 22 tilts forward, it can drive the first connecting rod structure downward and forward via the backrest drive rod 34 or directly. Furthermore, the third hinged end moves away from the first hinged end, causing the second connecting rod structure to deform, causing the backrest drive rod 34 to rotate relative to the backrest rod assembly. The backrest drive rod 34, via the second hinged end, drives the first connecting rod structure to deform, causing the front end of the backrest mounting plate 31 to tilt forward. Furthermore, due to the downward movement of the backrest rod assembly, the backrest mounting plate 31 rotates, causing the backrest mounting plate 31 to tilt backward. 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 items falling or being pinched, and improving the user experience of the sofa.

[0082] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0083] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, 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 actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as 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 the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0084] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, 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 device or element 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 outline of each component itself.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0086] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A backrest mechanism, characterized in that: The backrest mechanism comprises: A backrest mounting plate (31) having a reclining position tilted backward relative to the bracket side plate (21) and a retracted position retracted relative to the bracket side plate (21); A backrest rod group, the backrest rod group is hinged to the front end of the backrest mounting plate (31) and the rear end of the backrest mounting plate (31), the backrest rod group and the backrest mounting plate (31) form a first connecting rod structure, and the backrest rod group has a first hinge end and a second hinge end; A backrest drive rod (34), the lower end of the backrest drive rod (34) has a third hinged end, one of the first hinged end and the third hinged end is hinged to the bracket side plate (21), the other of the first hinged end and the third hinged end is hinged to the linkage assembly (22), the middle part of the backrest drive rod (34) is hingedly arranged on the backrest rod group, the bracket side plate (21), the linkage assembly (22), the backrest drive rod (34) and the backrest rod group together form a second connecting rod structure, the upper end of the backrest drive rod (34) is hinged to the second hinged end, and the backrest drive rod (34) can rotate relative to the backrest rod group to tilt the backrest mounting plate (31) forward through the second hinged end.

2. The backrest mechanism according to claim 1, characterized in that: The backrest rod group includes a first backrest rod (32), a second backrest rod (33), a third backrest rod (38) and a transition connecting rod (35), the first backrest rod (32) and the third backrest rod (38) are hinged, one of the upper ends of the first backrest rod (32) and the upper end 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 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 third backrest rod (38) and the lower end of the second backrest rod (33) are both hinged to the transition connecting rod (35), and the first hinged end is arranged on the transition connecting rod (35).

3. The backrest mechanism according to claim 2, characterized in that: The second hinged 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 backrest drive rod (34) is hinged to the transition connecting rod (35), and the backrest drive rod (34), the transition connecting rod (35), the first backrest rod (32) and the third backrest rod (38) form a third connecting rod structure.

4. The backrest mechanism according to claim 3, characterized in that: The first hinged end is the front end of the transition link (35), the middle part of the backrest drive rod (34) is hinged to the middle front part of the transition link (35), the lower end of the third backrest rod (38) is hinged to the middle rear part of the transition link (35), and the lower end of the second backrest rod (33) is hinged to the rear end of the transition link (35).

5. The backrest mechanism according to claim 2, characterized in that: The backrest mechanism also includes a limit button (37), and the limit button (37) is provided on at least one of the first backrest rod (32), the third backrest rod (38), the second backrest rod (33) and the backrest driving rod (34). The limit button (37) can abut against one of the backrest mounting plate (31), the first backrest rod (32), the third backrest rod (38), the second backrest rod (33) and the backrest driving rod (34) to keep the backrest mounting plate (31) in the retracted position or the reclining position.

6. The backrest mechanism according to claim 5, characterized in that: 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) and the limit button (37) are in contact with each other.

7. The backrest mechanism according to claim 6, characterized in that: The front end of the backrest mounting plate (31) is provided with an arc-shaped groove (311); when the backrest mounting plate (31) is located in the retracting position, the limit button (37) abuts against the front end of the arc-shaped groove (311); when the backrest mounting plate (31) is located in the reclining position, the limit button (37) abuts against the middle of the arc-shaped groove (311).

8. The backrest mechanism according to claim 2, characterized in that: When the backrest mounting plate (31) is located in 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.

9. The backrest mechanism 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°.

10. The backrest mechanism 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.

11. A seat bracket, characterized in that: The seat support comprises: base (10); A linkage mechanism (20) includes a bracket side plate (21) and a linkage assembly (22), wherein the linkage assembly (22) is hinged to the base (10), and the bracket side plate (21) is hingedly arranged on the linkage assembly (22); A backrest mechanism (30), wherein one of the first hinged end of the backrest mechanism (30) and the third hinged end of the backrest mechanism (30) is hinged to the bracket side panel (21), and the other of the first hinged end of the backrest mechanism (30) and the third hinged end of the backrest mechanism (30) is hinged to the linkage assembly (22), and the backrest mechanism (30) is the backrest mechanism (30) described in any one of claims 1 to 10.

12. The seat support according to claim 11, characterized in that The linkage assembly (22) comprises 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), wherein 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 second linkage plate (224), and the upper end of the first linkage plate (221) is hinged to the front end of the second linkage plate (222). The middle part of the plate (222) is hinged, 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 third hinged end of the backrest mechanism (30), 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); and / or, The seat support further includes an anti-tilt mechanism (40), the anti-tilt mechanism (40) including a first anti-tilt rod (41) and a second anti-tilt rod (42), the upper end of the first anti-tilt rod (41) being hinged to the upper end of the second anti-tilt rod (42), the middle portion of the first anti-tilt rod (41) being hinged to the front end of the linkage assembly (22), the lower end of the second anti-tilt rod (42) being 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.

13. The seat support according to claim 12, wherein: The seat support further includes a driving mechanism (50), the driving mechanism (50) including a driving member, a slider (51), a driving link (52) and a driving rod (53), 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 link (52) extends along the front-rear direction of the base (10), the driving rod (53) extends along the left-right direction of the base (10), the slider (51) is hinged to the lower end of the driving link (52), and the The upper end of the driving link (52) is hinged to the driving rod (53), and the driving 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 link (52) to rotate, thereby causing the driving rod (53) to move forward and upward. The driving rod (53) drives the backrest mounting plate (31) to move from the retracted 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), 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 side board (21) of the support, 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 side board (21) of the support, 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 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 hinged to the front end of the rear bench board (64) and the upper end of the rear bench connecting rod (67).

14. A zero-wall chair, characterized in that: The zero-wall seat comprises the seat frame according to any one of claims 11 to 13.

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