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 upper end of the retroverted assembly is hinged to the front end of the backrest mounting plate and the rear end of the backrest mounting plate, the retroverted assembly and the backrest mounting plate form a first connecting rod structure, and the lower end of the retroverted assembly is provided with a first hinged end; the front end of the forward tilting rod is provided with a second hinged end, the forward tilting rod is hinged to the first connecting rod structure, one of the first hinged end and the second hinged end is hinged to the support side plate, and the other one of the first hinged end and the second hinged end is hinged to the linkage assembly; the forward tilting rod, the support side plate, the linkage assembly and the backward tilting assembly jointly form a second connecting rod structure. The limiting structure is arranged on the first connecting rod structure, and the limiting structure can enable the backrest mounting plate to be kept at the retracting position or the leaning-back position. 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, which has a reclining position tilted rearward relative to the bracket side plate and a recovered position recovered relative to the bracket side plate; a rearward tilting assembly, the upper end of the rearward tilting assembly is hinged to the front end of the backrest mounting plate and the rear end of the backrest mounting plate, respectively, the rearward tilting assembly and the backrest mounting plate form a first connecting rod structure, and the lower end of the rearward tilting assembly has a first hinge end; a forward tilting rod, the front end of the forward tilting rod has a second hinge end, the forward tilting rod is hinged on the first connecting rod structure, one of the first hinge end and the second hinge end is hinged to the bracket side plate, and the other of the first hinge end and the second hinge end is hinged to the linkage assembly, the forward tilting rod, the bracket side plate, the linkage assembly and the rearward tilting assembly together form a second connecting rod structure; a limiting structure, which is arranged on the first connecting rod structure, and the limiting structure can keep the backrest mounting plate in the recovered position or the reclining position.

[0006] Furthermore, the rearward tilt assembly includes a front backrest link, a rear backrest link and a backrest drive rod, the upper end of the front backrest link is hinged to the front end of the backrest mounting plate, the lower end of the front backrest link is hinged to the middle part of the backrest drive rod, the upper end of the rear backrest link is hinged to the rear end of the backrest mounting plate, the lower end of the rear backrest link is hinged to the rear end of the backrest drive rod, the first hinged end is the front end of the backrest drive rod, and the rear end of the forward tilt rod is hinged to the front backrest link or the rear backrest link.

[0007] Furthermore, the limiting structure includes a limiting rod, the middle part of the forward tilt rod is hinged to the front backrest connecting rod, the front end of the limiting rod is hinged to the rear end of the forward tilt rod, and the rear end of the limiting rod is hinged to the rear backrest connecting rod.

[0008] Furthermore, the limiting structure also includes a limiting button, which is provided on at least one of the front backrest connecting rod, the rear backrest connecting rod and the backrest driving rod. The limiting button can abut against one of the backrest mounting plate, the forward tilt rod, the front backrest connecting rod, the rear backrest connecting rod and the backrest driving rod to keep the backrest mounting plate in the retracted position or the reclining position.

[0009] Furthermore, a limit button is provided on the rear backrest connecting rod, and when the backrest mounting plate is located in the retracted position and the reclining position, the backrest mounting plate and the limit button are in contact with each other.

[0010] Furthermore, an arc-shaped groove is provided at the rear 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 rear end of the arc-shaped groove.

[0011] Furthermore, when the backrest mounting plate is located in the reclining position, the angle between the front backrest connecting rod and the seat frame mounting surface is an acute angle.

[0012] 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 is between 30° and 38°.

[0013] 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.

[0014] 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 second 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 second hinged end of the backrest mechanism is hinged to the linkage assembly, and the backrest mechanism is the backrest mechanism provided above.

[0015] 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 side plate of the bracket, 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 side plate of the bracket, and the rear end of the fourth linkage plate is hinged to the backrest. The connecting rods are 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.

[0016] 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.

[0017] According to another aspect of the present invention, a zero-wall seat is provided, which includes the seat bracket provided above.

[0018] According to the technical solution of the present invention, the backrest mechanism includes a backrest mounting plate, a rearward tilting assembly, a forward tilting rod, and a limiting structure. When the backrest is tilted back and switched from the retracted position to the rearward tilting position, the linkage assembly can tilt forward relative to the bracket side plate. Since the forward tilting rod, the bracket side plate, the linkage assembly, and the rearward tilting assembly form a second link structure, when the linkage assembly tilts forward, it drives the first hinged end to move downward and forward relative to the second hinged end, and then drives the first link structure formed by the rearward tilting assembly and the backrest mounting plate to move downward and forward through the first hinged end. At the same time, the first hinged end drives the forward tilting rod to rotate relative to the bracket side plate through the second link structure, causing the rear end of the forward tilting rod to move downward and rotate relative to the bracket side plate, and the lower end of the first link structure to move in a direction away from the second hinged end. Since the forward tilting rod is hinged to the first link structure, under the limitation of the forward tilting rod, the first link structure is deformed, the backrest mounting plate tilts backward, and under the limitation of the first link structure, the front end of the first link structure tilts forward. 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

[0019] 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:

[0020] 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;

[0021] 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;

[0022] 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;

[0023] 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;

[0024] 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;

[0025] Figure 6 A partial schematic diagram of a seat support provided according to an embodiment of the present invention when in a TV posture is shown;

[0026] 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;

[0027] 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;

[0028] 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;

[0029] Figure 10 A comparison diagram of three postures of a seat bracket provided according to an embodiment of the present utility model is shown.

[0030] The above drawings include the following reference numerals:

[0031] 10. Base;

[0032] 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;

[0033] 30. Backrest mechanism; 31. Backrest mounting plate; 311. Arc groove; 32. Front backrest connecting rod; 33. Rear backrest connecting rod; 34. Backrest drive rod; 35. Forward tilt rod; 36. Limit rod; 37. Limit button;

[0034] 40. Anti-tilt mechanism; 41. First anti-tilt bar; 42. Second anti-tilt bar;

[0035] 50. Driving mechanism; 51. Slider; 52. Driving connecting rod; 53. Driving rod; 54. Front driving plate;

[0036] 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

[0037] 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.

[0038] 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 rearward tilting assembly, a forward tilting rod 35, and a limiting structure. The backrest mounting plate 31 has a rearward reclining position tilted rearward relative to the bracket side plate 21 and a recovered position recovered relative to the bracket side plate 21; the upper end of the rearward tilting assembly is hinged to the front end of the backrest mounting plate 31 and the rear end of the backrest mounting plate 31 respectively, the rearward tilting assembly and the backrest mounting plate 31 form a first connecting rod structure, and the lower end of the rearward tilting assembly has a first hinge end; the front end of the forward tilting rod 35 has a second hinge end, the forward tilting rod 35 is hinged on the first connecting rod structure, one of the first hinge end and the second hinge end is hinged to the bracket side plate 21, and the other of the first hinge end and the second hinge end is hinged to the linkage assembly 22, the forward tilting rod 35, the bracket side plate 21, the linkage assembly 22 and the rearward tilting assembly together form a second connecting rod structure; the limiting structure is provided on the first connecting rod structure, and the limiting structure can keep the backrest mounting plate 31 in the recovered position or the rearward reclining position.

[0039] By applying the technical solution of the present invention, the backrest mechanism includes a backrest mounting plate 31, a rearward tilting assembly, a forward tilting rod 35 and a limiting structure. When the backrest is tilted back and switched from the retracted position to the rearward tilting position, the linkage assembly 22 can tilt forward relative to the bracket side plate 21. Since the forward tilting rod 35, the bracket side plate 21, the linkage assembly 22 and the rearward tilting assembly form a second connecting rod structure, when the linkage assembly 22 tilts forward, it drives the first hinged end to move downward and forward relative to the second hinged end, and then drives the first connecting rod structure formed by the rearward tilting assembly and the backrest mounting plate 31 to move downward and forward through the first hinged end. At the same time, the first hinged end drives the tilt rod 35 to rotate relative to the bracket side panel 21 through the second link structure, causing the rear end of the tilt rod 35 to move downward and rotate relative to the bracket side panel 21. The lower end of the first link structure moves in a direction away from the second hinged end. Since the tilt rod 35 is hinged to the first link structure, the first link structure deforms under the restriction of the tilt rod 35, causing the backrest mounting plate 31 to tilt backward. Under the restriction of the first link structure, the front end of the first link structure tilts forward. The distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side panel 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side panel 21, thereby reducing the gap between the backrest portion and the seat portion, eliminating the risk of items falling or being pinched, and improving the user experience of the sofa.

[0040] In this embodiment, the limiting structure provided on the first link structure maintains the backrest mounting plate 31 in the retracted or reclined position, preventing deformation of the first link structure and significant shaking or even tipping of the seat. Furthermore, the limiting structure does not restrict the normal rotation of the backrest mounting plate 31 when the backrest mounting plate 31 switches between the retracted or reclined position.

[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] In addition, the first connecting rod structure formed by the rearward tilt assembly and the backrest mounting plate 31 is hinged to the bracket side plate 21 by using the forward tilt rod 35, rather than the backrest mounting plate 31 being directly hinged to 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 achieving the zero wall-leaning function.

[0044] like Figure 1 、 Figure 6 as well as Figure 8As shown, the rearward tilting assembly includes a front backrest link 32, a rear backrest link 33, and a backrest drive rod 34. The upper end of the front backrest link 32 is hinged to the front end of the backrest mounting plate 31, the lower end of the front backrest link 32 is hinged to the middle part of the backrest drive rod 34, the upper end of the rear backrest link 33 is hinged to the rear end of the backrest mounting plate 31, and the lower end of the rear backrest link 33 is hinged to the rear end of the backrest drive rod 34. The first hinged end is the front end of the backrest drive rod 34, and the rear end of the forward tilting rod 35 is hinged to the front backrest link 32 or the rear backrest link 33. By adopting the above-mentioned rearward tilting assembly, a first link structure (four-link structure) can be formed by utilizing the front backrest link 32, the rear backrest link 33, and the backrest drive rod 34, and the first link structure is deformed by the forward tilting rod 35 to cause the backrest mounting plate 31 to tilt forward.

[0045] When the backrest driving rod 34 is hinged to the rear backrest connecting rod 33, the backrest driving rod 34 can be directly hinged to the rear backrest connecting rod 33 or indirectly hinged to the rear backrest connecting rod 33. For example, the backrest driving rod 34 can be hinged to the rear backrest connecting rod 33 through the limiting rod 36 of this embodiment.

[0046] like Figure 1 and Figure 6 As shown, the limiting structure includes a limiting rod 36. The middle portion of the forward tilt rod 35 is hinged to the front backrest link 32, the front end of the limiting rod 36 is hinged to the rear end of the forward tilt rod 35, and the rear end of the limiting rod 36 is hinged to the rear backrest link 33. With the limiting rod 36, when the forward tilt rod 35 rotates clockwise, the limiting rod 36 can pull the rear backrest link 33, causing the upper end of the rear backrest link 33 to rotate counterclockwise. This allows the first link structure to deform more smoothly, and the backrest mounting plate 31 to tilt forward and backward more smoothly.

[0047] In this embodiment, the middle part of the forward tilt rod 35 is hinged to the middle part of the front backrest link 32, and the rear end of the limit rod 36 is hinged to the middle part of the rear backrest link 33. The front backrest link 32, the forward tilt rod 35, the limit rod 36, the rear backrest link 33 and the backrest drive rod 34 form a five-link structure. The front backrest link 32, the forward tilt rod 35, the limit rod 36, the rear backrest link 33 and the backrest drive rod 34 form a five-link structure to keep the backrest mounting plate 31 in the retracted position or the reclining position.

[0048] like Figure 1 and Figure 2As shown, the limiting structure further includes a limiting button 37, which is provided on at least one of the front backrest link 32, the rear backrest link 33, and the backrest drive rod 34. The limiting button 37 can abut against one of the backrest mounting plate 31, the forward tilt rod 35, the front backrest link 32, the rear backrest link 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 limiting the backrest mounting plate 31 in the retracted position or the reclining position using the limiting button 37 has the advantages of being simple in structure and easy to set up.

[0049] 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.

[0050] like Figure 1 As shown, the limit button 37 is provided on the rear backrest connecting rod 33. 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 rear backrest connecting rod 33, 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.

[0051] like Figure 1 and Figure 6 As shown, the rear 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 against the front end of the arcuate groove 311. When the backrest mounting plate 31 is in the reclining position, the limit button 37 abuts against the rear end 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 the rotation, thereby ensuring smooth rotation of the backrest mounting plate 31.

[0052] In this embodiment, the curvature radius at both ends of the arc-shaped groove 311 is smaller than the curvature radius at the middle thereof.

[0053] like Figure 9 As shown, when the backrest mounting plate 31 is in the reclining position, the angle A between the front backrest connecting rod 32 and the seat frame mounting surface is acute. This acute-angle structure allows the front end of the backrest mounting plate 31 to be closer to the seat frame mounting surface, reducing the distance between the bracket side panels 21 and the backrest mounting plate 31. This creates a zero-gap between the seat and backrest soft padding after the soft padding is installed. This zero-gap feature 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.

[0054] Among them, the angle A between the front backrest connecting rod 32 and the seat frame mounting surface refers to the angle between the line connecting the hinge point of the front backrest connecting rod 32 and the backrest mounting plate 31 and the hinge point of the front backrest connecting rod 32 and the backrest driving rod 34 and the seat frame mounting surface.

[0055] 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 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 requirements. Furthermore, this lowered backrest allows the backrest to be lowered, making the zero-gravity function more pronounced and providing a better user experience.

[0056] 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°.

[0057] 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.

[0058] 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.

[0059] In this embodiment, the front backrest link 32 is relatively long, and when the user is in a sitting position, the front backrest link 32 is nearly in a vertical state.

[0060] 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.

[0061] 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.

[0062] 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 front backrest connecting rod 32 and the ground.

[0063] Another embodiment of the present application provides a seat frame, comprising a base 10, a linkage mechanism 20, and a backrest mechanism 30. The linkage mechanism 20 comprises a frame side panel 21 and a linkage assembly 22. The linkage assembly 22 is hinged to the base 10, and the frame side panel 21 is hingedly mounted on the linkage assembly 22. One of the first hinged end of the backrest mechanism and the second hinged end of the backrest mechanism is hinged to the frame side panel, and the other of the first hinged end of the backrest mechanism and the second hinged end of the backrest mechanism is hinged to the linkage assembly. The backrest mechanism is the backrest mechanism provided above. Using the above-described seat frame, when the backrest is reclined and switched from a retracted position to a reclining position, the linkage assembly 22 can tilt forward relative to the frame side panel 21. Because the forward tilt rod 35, the frame side panel 21, the linkage assembly 22, and the rearward tilt assembly form a second link structure, when the linkage assembly 22 tilts forward, it drives the first hinged end to move downward and forward relative to the second hinged end, thereby driving the first link structure formed by the rearward tilt assembly and the backrest mounting plate 31 downward and forward through the first hinged end. At the same time, the first hinged end drives the tilt rod 35 to rotate relative to the bracket side panel 21 through the second link structure, causing the rear end of the tilt rod 35 to move downward and rotate relative to the bracket side panel 21. The lower end of the first link structure moves in a direction away from the second hinged end. Since the tilt rod 35 is hinged to the first link structure, the first link structure deforms under the restriction of the tilt rod 35, causing the backrest mounting plate 31 to tilt backward. Under the restriction of the first link structure, the front end of the first link structure tilts forward. The distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side panel 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side panel 21, thereby reducing the gap between the backrest portion and the seat portion, eliminating the risk of items falling or being pinched, and improving the user experience of the sofa.

[0064] like Figure 1 and Figure 3 As 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.

[0065] 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.

[0066] like Figure 6 and Figure 7As 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 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 rear backrest connecting rod 33, 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 rear backrest connecting rod 33 to move downward.

[0067] The middle portion of the first anti-roll bar 41 is hinged to the first linkage plate 221 .

[0068] Specifically, when the fourth linkage plate 224 rotates clockwise, the rear end of the fourth linkage plate 224 drives the rear backrest link 33 downward and forward, which in turn drives the entire first linkage structure downward and forward. The hinge point between the backrest drive rod 34 and the front backrest link 32 moves away from the bracket side plate 21. At this point, constrained by the second linkage structure, the front backrest link 32 rotates counterclockwise relative to the forward tilt rod 35. The angle between the front backrest link 32 and the forward tilt rod 35 gradually increases, causing the front backrest link 32 to tilt the front end of the backrest mounting plate forward, deforming the first linkage structure. Furthermore, under the pull of the limit rod 36, the distances between the hinge points of the front backrest link 32 and the backrest mounting plate 31 and the hinge points of the forward tilt rod 35 and the limit rod 36 gradually increase, causing the upper end of the rear backrest link 33 to gradually approach the front backrest link 32, thereby causing the backrest mounting plate 31 to tilt backward.

[0069] like Figures 2 to 4As 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.

[0070] Specifically, the bracket side plate 21 has a through hole provided therethrough, and the driving rod 53 passes through the through hole.

[0071] like Figure 1 and Figure 5 As 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.

[0072] 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.

[0073] Wherein, the driving component is a linear motor.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Yet another embodiment of the present application provides a zero-wall-rest chair, comprising the seat frame provided above. With the aforementioned zero-wall-rest chair, when the backrest is reclined and switched from a retracted position to a reclined position, the linkage assembly 22 is capable of tilting forward relative to the frame side panels 21. Because the forward tilting rod 35, the frame side panels 21, the linkage assembly 22, and the rearward tilting assembly form a second link structure, the forward tilting of the linkage assembly 22 drives the first hinged end downwardly and forwardly relative to the second hinged end, thereby driving the first link structure formed by the rearward tilting assembly and the backrest mounting plate 31 downwardly and forwardly via the first hinged end. At the same time, the first hinged end drives the tilt rod 35 to rotate relative to the bracket side panel 21 through the second link structure, causing the rear end of the tilt rod 35 to move downward and rotate relative to the bracket side panel 21. The lower end of the first link structure moves in a direction away from the second hinged end. Since the tilt rod 35 is hinged to the first link structure, the first link structure deforms under the restriction of the tilt rod 35, causing the backrest mounting plate 31 to tilt backward. Under the restriction of the first link structure, the front end of the first link structure tilts forward. The distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side panel 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side panel 21, thereby reducing the gap between the backrest portion and the seat portion, eliminating the risk of items falling or being pinched, and improving the user experience of the sofa.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 rearward tilting assembly, wherein the upper end of the rearward tilting assembly is hinged to the front end of the backrest mounting plate (31) and the rear end of the backrest mounting plate (31), respectively, the rearward tilting assembly and the backrest mounting plate (31) form a first connecting rod structure, and the lower end of the rearward tilting assembly has a first hinged end; A forward tilt rod (35), wherein the front end of the forward tilt rod (35) has a second hinged end, the forward tilt rod (35) is hinged on the first connecting rod structure, one of the first hinged end and the second hinged end is hinged to the bracket side plate (21), and the other of the first hinged end and the second hinged end is hinged to the linkage assembly (22), and the forward tilt rod (35), the bracket side plate (21), the linkage assembly (22) and the rearward tilt assembly together form a second connecting rod structure; A limiting structure is provided on the first connecting rod structure, and the limiting structure can keep the backrest mounting plate (31) in the retracted position or the reclining position.

2. The backrest mechanism according to claim 1, characterized in that: The rearward tilting assembly comprises a front backrest connecting rod (32), a rear backrest connecting rod (33) and a backrest driving rod (34), wherein the upper end of the front backrest connecting rod (32) is hinged to the front end of the backrest mounting plate (31), the lower end of the front backrest connecting rod (32) is hinged to the middle part of the backrest driving rod (34), the upper end of the rear backrest connecting rod (33) is hinged to the rear end of the backrest mounting plate (31), the lower end of the rear backrest connecting rod (33) is hinged to the rear end of the backrest driving rod (34), the first hinged end is the front end of the backrest driving rod (34), and the rear end of the forward tilting rod (35) is hinged to the front backrest connecting rod (32) or the rear backrest connecting rod (33).

3. The backrest mechanism according to claim 2, characterized in that: The limiting structure includes a limiting rod (36), a middle portion of the forward tilting rod (35) is hinged to the front backrest connecting rod (32), a front end of the limiting rod (36) is hinged to the rear end of the forward tilting rod (35), and a rear end of the limiting rod (36) is hinged to the rear backrest connecting rod (33).

4. The backrest mechanism according to claim 2, characterized in that: The limiting structure also includes a limiting button (37), which is provided on at least one of the front backrest connecting rod (32), the rear backrest connecting rod (33) and the backrest driving rod (34). The limiting button (37) can abut against one of the backrest mounting plate (31), the forward tilting rod (35), the front backrest connecting rod (32), the rear backrest connecting rod (33) and the backrest driving rod (34) to keep the backrest mounting plate (31) in the retracted position or the reclining position.

5. The backrest mechanism according to claim 4, characterized in that: The limit button (37) is arranged on the rear backrest connecting rod (33); 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.

6. The backrest mechanism according to claim 5, characterized in that: The rear 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 rear end of the arc-shaped groove (311).

7. The backrest mechanism according to claim 2, characterized in that: When the backrest mounting plate (31) is located in the reclining position, the angle between the front backrest connecting rod (32) and the seat frame mounting surface of the bracket side plate (21) is an acute angle.

8. 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°.

9. 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.

10. 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 and the second 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 second hinged end of the backrest mechanism is hinged to the linkage assembly, and the backrest mechanism is the backrest mechanism described in any one of claims 1 to 9.

11. The seat support according to claim 10, 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 first hinge 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.

12. The seat support according to claim 10, 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).

13. A zero-wall chair, characterized in that: The zero-wall seat comprises the seat frame according to any one of claims 10 to 12.

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