Seat Bracket and Zero Wall Recliner Having Seat Bracket

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority to Chinese Application No. 202411729348.4, filed on November 28, 2025 and entitled “Seat Bracket and Zero Wall Recliner Having Seat Brackett”; Chinese Application No. 202422925344.5, filed on November 28, 2024 and entitled “Backrest Mechanism, Seat Bracket, and Zero Wall Recliner”; and Chinese Application No. 202422925267.3, filed on November 28, 2024 and entitled “Backrest Mechanism, Seat Bracket, and Zero Wall Recliner”, the entire contents of each of which are incorporated herein for reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of furniture, and in particular, to a seat bracket and a zero wall recliner having the seat bracket and.

BACKGROUND

A reclining sofa is a common piece of furniture in daily life, allowing users to adjust their posture according to their needs. A reclining sofa typically provides two or three positions, such as lying position, TV position, and sitting position. The reclining sofa includes a leg section, a seat section, and a backrest section. By arranging upholstered cushions on the corresponding structures, the sofa forms upholstered seat, upholstered backrest, and upholstered footrest structures. In the sitting position, the leg section remains retracted, the seat section is approximately horizontal, and the backrest is a near-upright state. In the TV position, also referred to as the television position, the leg section extends forward, while the backrest remains substantially unchanged. In the lying position, the backrest tilts backward, while the leg section remains substantially unchanged, allowing users to rest.

However, during the reclining process of existing reclining sofas, since the backrest portion tilts rearward, a relatively large displacement occurs between the user's back and the sofa backrest, thereby reducing the user experience.

SUMMARY

The present disclosure provides a seat bracket and a zero wall recliner having the seat bracket, so as to solve the problem of poor user experience in the related art.

According to one aspect of the present disclosure, a seat bracket is provided. The seat bracket includes: a linkage mechanism including a bracket side plate and a linkage assembly, wherein the bracket side plate has a seat frame mounting surface, and the linkage assembly is hingedly connected with the bracket side plate; and a backrest mechanism, including a backrest mounting plate and a backrest linkage assembly, wherein a front end of the backrest mounting plate and a rear end of the backrest mounting plate are hingedly connected with the bracket side plate and the linkage assembly, respectively, via the backrest linkage assembly; the backrest mounting plate has a retracted position in which it is retracted relative to the bracket side plate and a reclined position in which it is tilted rearward relative to the bracket side plate; the linkage mechanism is capable of driving the backrest mounting plate to switch between the retracted position and the reclined position via the backrest linkage assembly; when the backrest mounting plate is in the retracted position, the rear end of the backrest mounting plate is located at point A, and the front end of the backrest mounting plate is located at point B; when the backrest mounting plate is in the reclined position, the rear end of the backrest mounting plate is located at point C, and the front end of the backrest mounting plate is located at point D; a line connecting the point A and the point C is a connecting line L1, and a line connecting the point B and the point D is a connecting line L2; an intersection of a perpendicular centerline of the connecting line L1 and a perpendicular centerline of the connecting line L2 is point F; when the backrest mounting plate switches between the retracted position and the reclined position, a distance between the point F and the seat frame mounting surface is within a preset dimension range, so that a movement trajectory of the point F falls within a range of motion of a human lumbar region.

Further, the backrest linkage assembly includes a first backrest link, a second backrest link, a first drive link, and a second drive link; an upper end of the first backrest link and an upper end of the second backrest link are hingedly connected with the front end of the backrest mounting plate and the rear end of the backrest mounting plate, respectively; one of the first drive link and the second drive link is hingedly connected with both a lower end of the first backrest link and a lower end of the second backrest link, and one of the first drive link and the second drive link, together with the first backrest link, the second backrest link, and the backrest mounting plate, form a first link structure; the other one of a rear end of the first drive link and a rear end of the second drive link is hingedly connected with the first link structure so as to deform the first link structure; one of a front end of the first drive link and a front end of the second drive link is hingedly connected with the bracket side plate, and the other one of the front end of the first drive link and the front end of the second drive link is hingedly connected with the linkage assembly; the first drive link, the second drive link, the bracket side plate, and the linkage assembly form a second link structure.

Further, an upper end of the first backrest link is hingedly connected with the front end of the backrest mounting plate, and the upper end of the second backrest link is hingedly connected with the rear end of the backrest mounting plate; the lower end of the first backrest link is hingedly connected the a middle portion of the first drive link, and the lower end of the second backrest link is hingedly connected with the rear end of the first drive link; the front end of the first drive link is hingedly connected with the linkage assembly, and the front end of the second drive link is hingedly connected with the bracket side plate; the rear end of the second drive link is hingedly connected with the first link structure; the backrest mechanism further includes a limit link that maintains the backrest mounting plate in the retracted position or the reclined position.

Further, a middle portion of the second drive link is hingedly connected with a middle portion of the first backrest link; a front end of the limit link is hingedly connected with the rear end of the second drive link, and a rear end of the limit link is hingedly connected with a middle portion of the second backrest link.

Further, the backrest linkage assembly includes a first backrest link, a second backrest link, a first drive link, a second drive link, and a third backrest link; the first backrest link is hingedly connected with the third backrest link; one of an upper end of the first backrest link and an upper end of the second backrest link is hingedly connected with the front end of the backrest mounting plate, and the other one of the upper end of the first backrest link and the upper end of the second backrest link is hingedly connected with the rear end of the backrest mounting plate; one of the first drive link and the second drive link is hingedly connected with both a lower end of the third backrest link and a lower end of the second backrest link; the first backrest link, the third backrest link, one of the first drive link and the second drive link, the second backrest link, and the backrest mounting plate together form a first link structure; the first link structure is provided with a movable hinge end, and the other one of a rear end of the first drive link and a rear end of the second drive link is hingedly connected with the movable hinge end.

Further, the movable hinge end is a lower end of the first backrest link; a middle portion of the first backrest link is hingedly connected with an upper end of the third backrest link; the first drive link is hingedly connected with the second drive link; and the first drive link, the second drive link, the first backrest link, and the third backrest link together form a third link structure.

Further, a front end of the second drive link is hingedly connected with the bracket side plate; a middle portion of the first drive link is hingedly connected with a mid-front portion of the second drive link; the lower end of the third backrest link is hingedly connected with a mid-rear portion of the second drive link; the lower end of the second backrest link is hingedly connected with the rear end of the second drive link; and a lower end of the first drive link is hingedly connected with the linkage assembly.

According to another aspect of the present disclosure, a zero wall recliner is provided. The zero wall recliner includes the seat bracket provided above.

By applying the technical solution of the present disclosure, the seat bracket includes the linkage mechanism and the backrest mechanism. Since the front end and the rear end of the backrest mounting plate are hingedly connected with the bracket side plate and the linkage assembly, respectively, via the backrest linkage assembly, the linkage mechanism is capable of switching the backrest mounting plate between the retracted position and the reclined position through the backrest linkage assembly. Furthermore, when the backrest mounting plate switches between the retracted position and the reclined position, the distance between the point F and the seat frame mounting surface of the bracket side plate is within the preset dimension range, thereby enabling the movement trajectory of the point F to fall within the range of motion of the human lumbar region. This results in a very small displacement of the human lumbar region relative to the seat frame mounting surface, which in turn minimizes the movement of the human lumbar region relative to the seat frame mounting surface during operation of the seat bracket. Consequently, the displacement of the human back relative to the backrest mounting plate is extremely small, producing an “anti-back-rub” effect and thereby enhancing user comfort during use.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which form a part of the present application, are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and the description thereof are used to explain the present disclosure, and do not form improper limits to the present disclosure. In the drawings:

FIG. 1 shows a comparison view of a backrest mounting plate of a seat bracket according to an embodiment of the present disclosure in a retracted position and a reclined position;

FIG. 2 is a schematic structural view of a seat bracket according to embodiment 1 of the present disclosure in a TV position;

FIG. 3 is a schematic structural view of the seat bracket according to embodiment 1 of the present disclosure in a lying position;

FIG. 4 is a schematic structural view of the seat bracket according to embodiment 1 of the present disclosure in a sitting position;

FIG. 5 is a schematic structural view of the seat bracket according to embodiment 1 of the present disclosure in the TV position;

FIG. 6 is a schematic structural view of the seat bracket according to embodiment 1 of the present disclosure in the lying position;

FIG. 7 is a partial schematic view of the seat bracket according to embodiment 1 of the present disclosure in the TV position;

FIG. 8 is a partial schematic view of the seat bracket according to embodiment 1 of the present disclosure in the lying position;

FIG. 9 is a partial schematic view of the seat bracket according to embodiment 1 of the present disclosure in the TV position;

FIG. 10 is a partial schematic view of the seat bracket according to embodiment 1 of the present disclosure in the lying position;

FIG. 11 is a comparison view of the seat bracket according to embodiment 1 of the present disclosure in three positions;

FIG. 12 is a schematic structural view of a seat bracket according to embodiment 2 of the present disclosure in a TV position;

FIG. 13 is a schematic structural view of the seat bracket according to embodiment 2 of the present disclosure in a lying position;

FIG. 14 is a schematic structural view of the seat bracket according to embodiment 2 of the present disclosure in a sitting position;

FIG. 15 is a schematic structural view of the seat bracket according to embodiment 2 of the present disclosure in the TV position;

FIG. 16 is a schematic structural view of the seat bracket according to embodiment 2 of the present disclosure in the lying position;

FIG. 17 is a partial schematic view of the seat bracket according to embodiment 2 of the present disclosure in the TV position;

FIG. 18 is a partial schematic view of the seat bracket according to embodiment 2 of the present disclosure in the lying position;

FIG. 19 is a partial schematic view of the seat bracket according to embodiment 2 of the present disclosure in the TV position;

FIG. 20 is a partial schematic view of the seat bracket according to embodiment 2 of the present disclosure in the lying position;

FIG. 21 a comparison view of the seat bracket according to embodiment 2 of the present disclosure in three positions.

The described drawings include the following reference numerals:

10: base;

20: linkage mechanism; 21: bracket side plate; 22: linkage assembly; 221: first linkage plate; 222: second linkage plate; 223: third linkage plate; 224: fourth linkage plate; 225: fifth linkage plate; 24: first linkage link; 25: second linkage link; 26: third linkage link;

30: backrest mechanism; 31: backrest mounting plate; 311: arcuate slot; 32: first backrest link; 33: second backrest link; 34: first drive link; 35: second drive link; 36: limit link; 37: limit knob; 38: third backrest link;

40: anti-forward-tilt mechanism; 41: first anti-forward-tilt link; 42: second anti-forward-tilt link;

50: drive mechanism; 51: slider; 52: drive link; 53: transmission link; 54: front drive plate;

60: footrest assembly; 61: inner footrest plate; 62: outer footrest plate; 63: front footrest plate; 64: rear footrest plate; 65: first front footrest link; 66: second front footrest link; 67: rear footrest link; 68: front footrest; 69: rear footrest.

DETAILED DESCRIPTION OF EMBODIMENTS

The following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall belong to the scope of protection of the present disclosure.

As shown in FIGS. 1 to 21, an embodiment of the present disclosure provides a seat bracket, including a linkage mechanism 20 and a backrest mechanism 30; the linkage mechanism 20 includes a bracket side plate 21 and a linkage assembly 22, wherein the bracket side plate 21 has a seat frame mounting surface, and the linkage assembly 22 is hingedly connected with the bracket side plate 21; the backrest mechanism 30 includes a backrest mounting plate 31 and a backrest linkage assembly, wherein a front end of the backrest mounting plate 31 and a rear end of the backrest mounting plate 31 are hingedly connected with the bracket side plate 21 and the linkage assembly 22, respectively, via the backrest linkage assembly; the backrest mounting plate 31 has a retracted position in which it is retracted relative to the bracket side plate 21 and a reclined position in which it is tilted rearward relative to the bracket side plate 21; and the linkage mechanism 20 is capable of driving the backrest mounting plate 31 to switch between the retracted position and the reclined position via the backrest linkage assembly. When the backrest mounting plate 31 is in the retracted position, the rear end of the backrest mounting plate 31 is located at point A, and the front end of the backrest mounting plate 31 is located at point B; when the backrest mounting plate 31 is in the reclined position, the rear end of the backrest mounting plate 31 is located at point C, and the front end of the backrest mounting plate 31 is located at point D; a line connecting the point A and the point C is a connecting line L1, and a line connecting the point B and the point D is a connecting line L2; an intersection of a perpendicular centerline of connecting line L1 and a perpendicular centerline of connecting line L2 is point F; when the backrest mounting plate 31 switches between the retracted position and the reclined position, a distance between the point F and the seat frame mounting surface is within a preset dimension range K1, so that a movement trajectory of the point F falls within a range of motion of a human lumbar region.

By applying the technical solution of the present disclosure, the seat bracket includes the linkage mechanism 20 and the backrest mechanism 30. Since the front end and the rear end of the backrest mounting plate 31 are hingedly connected with the bracket side plate 21 and the linkage assembly 22, respectively, via the backrest linkage assembly, the linkage mechanism 20 is capable of switching the backrest mounting plate 31 between the retracted position and the reclined position through the backrest linkage assembly. Furthermore, when the backrest mounting plate 31 switches between the retracted position and the reclined position, the distance between the point F and the seat frame mounting surface of the bracket side plate 21 is within the preset dimension range, thereby enabling the movement trajectory of the point F to fall within the range of motion of the human lumbar region. This results in a very small displacement of the human lumbar region relative to the seat frame mounting surface, which in turn minimizes the movement of the human lumbar region relative to the seat frame mounting surface during operation of the seat bracket. Consequently, the displacement of the human back relative to the backrest mounting plate 31 is extremely small, producing an “anti-back-rub” effect and thereby enhancing user comfort during use.

The positions of point A, point B, point C, and point D are the positions of the backrest mounting plate 31 relative to the bracket side plate 21 after the backrest mounting plate 31 is mounted on the seat bracket. The front end and the rear end of the backrest mounting plate 31 refer to two hinge points of the backrest mounting plate 31 with the backrest linkage assembly.

In the present embodiment, since point F is the intersection of the perpendicular centerline of the connecting line L1 and the perpendicular centerline of the connecting line L2, with L1 being related to the rear end of the backrest mounting plate 31 and L2 being related to the front end of the backrest mounting plate 31, point F serves as the rotation center of the backrest mounting plate 31. During operation of the seat bracket, the displacement of the rotation center of the backrest mounting plate 31 relative to the seat frame mounting surface is very small, thereby resulting in a very small displacement of the human lumbar region relative to the seat frame mounting surface.

It should be noted that, regardless of whether the seat bracket is in the sitting position, the TV position, or the lying position, the movement trajectory of point F always falls within the range of motion of the human lumbar region.

The preset dimension range K1 78 mm to 239 mm. By using the described dimension range, the distance between point F and the seat frame mounting surface can be made close to the distance between the human lumbar region and the seat frame mounting surface, thereby reducing the movement range of the human lumbar region relative to the seat frame mounting surface during operation of the recliner.

It should be noted that, depending on the setting position of the seat frame mounting surface, the distance between point F and the seat frame mounting surface can fall within different dimension ranges. Specifically, the seat frame mounting surface either protrudes from the upper surface of the bracket side plate 21, or is located below the upper surface of the bracket side plate 21. In the described two configurations, the distance between the seat frame mounting surfaces is approximately 20 mm, such that the preset dimension range K1 can be 78 mm to 217 mm; or, the preset dimension range K1 can be 100 mm to 239 mm.

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

As shown in FIG. 1, the distance between point F and the centerline of the backrest mounting plate 31 is in the range of 80 mm to 320 mm. By setting the distance between point F and the centerline of the backrest mounting plate 31 within the described dimension range, during operation of the recliner, the human back remains in continuous contact with the seat backrest, enabling it to follow the movement of the seat backrest without requiring the back to move, thereby enhancing the user experience of the recliner.

The distance between point F and the centerline of the backrest mounting plate 31 can be 80 mm, 100 mm, 150 mm, 200 mm, 260 mm, 300 mm, 320 mm, or any value between 80 mm and 320 mm.

It should be noted that, as shown in FIG. 1, when the backrest mounting plate is in the retracted position, the distance between point F and the centerline of the backrest mounting plate 31 is K2; when the backrest mounting plate is in the reclined position, the distance between point F and the centerline of the backrest mounting plate 31 is K3, and K2 = K3.

The centerline of the backrest mounting plate 31 refers to a line connecting two mounting holes provided on the backrest mounting plate 31 for connection with a backrest panel. The line connecting the two mounting holes is the centerline of the backrest mounting plate 31.

As shown in FIGS. 2 and 12, the backrest linkage assembly includes a first backrest link 32, a second backrest link 33, a first drive link 34, and a second drive link 35; an upper end of the first backrest link 32 and an upper end of the second backrest link 33 are hingedly connected with the front end of the backrest mounting plate 31 and the rear end of the backrest mounting plate 31, respectively; one of the first drive link 34 and the second drive link 35 is hingedly connected with both a lower end of the first backrest link 32 and a lower end of the second backrest link 33, and one of the first drive link 34 and the second drive link 35, together with the first backrest link 32, the second backrest link 33, and the backrest mounting plate 31, form a first link structure; the other one of a rear end of the first drive link 34 and a rear end of the second drive link 35 is hingedly connected with the first link structure so as to deform the first link structure; one of a front end of the first drive link 34 and a front end of the second drive link 35 is hingedly connected with the bracket side plate 21, and the other one of the front end of the first drive link 34 and the front end of the second drive link 35 is hingedly connected with the linkage assembly 22; the first drive link 34, the second drive link 35, the bracket side plate 21, and the linkage assembly 22 form a second link structure. By using the above backrest linkage assembly, when the linkage assembly 22 tilts forward relative to the bracket side plate 21, the second link structure is deformed, thereby driving the first drive link 34 and the second drive link 35 to move forward and downward. Furthermore, since the other one of the first drive link 34 and the second drive link 35 is hingedly connected with the first link structure, the first link structure is deformed, causing the backrest mounting plate 31 to recline, thereby switching the backrest mounting plate 31 from the retracted position to the reclined position.

The movement process of the backrest mounting plate 31 switching from the reclined position to the retracted position is the reverse of the described process.

It should be noted that both the first link structure and the second link structure are multi-link structures, for example, a four-link structure or a five-link structure.

As shown in FIGS. 2 and 12, the seat bracket further includes an anti-forward-tilt mechanism 40; the anti-forward-tilt mechanism 40 includes a first anti-forward-tilt link 41 and a second anti-forward-tilt link 42; an upper end of the first anti-forward-tilt link 41 is hingedly connected with an upper end of the second anti-forward-tilt link 42; a middle portion of the first anti-forward-tilt link 41 is hingedly connected with a front end of the linkage assembly 22; a lower end of the second anti-forward-tilt link 42 is hingedly connected with the base 10; and when the backrest mounting plate 31 is in the reclined position, a lower end of the first anti-forward-tilt link 41 is in contact with a ground. By using the described anti-forward-tilt mechanism 40, in the lying position, the first anti-forward-tilt link 41 is in contact with the ground to form a support, thereby providing support for the seat bracket and reducing the risk of forward tilting of the seat bracket under zero-gravity conditions.

In the present embodiment, a roller is provided at the lower end of the first anti-forward-tilt link 41, and in the lying position, the roller is in contact with the ground.

As shown in FIGS. 7 and 8, 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; a lower end of the first linkage plate 221 is hingedly connected with the base 10, and an upper end of the first linkage plate 221 is hingedly connected with a front end of the second linkage plate 222; a rear end of the second linkage plate 222 is hingedly connected with the bracket side plate 21; a front end of the third linkage plate 223 is hingedly connected with a middle portion of the second linkage plate 222, and a rear end of the third linkage plate 223 is hingedly connected with a front end of the fourth linkage plate 224; a lower end of the fourth linkage plate 224 is hingedly connected with a lower end of the bracket side plate 21, and a rear end of the fourth linkage plate 224 is hingedly connected with the backrest linkage assembly; an upper end of the fourth linkage plate 224 is hingedly connected with an upper end of the fifth linkage plate 225, and a lower end of the fifth linkage plate 225 is hingedly connected with the base 10. By using the described linkage assembly 22, when the recliner switches from the TV position to the lying position, the backrest mounting plate 31 moves from the retracted position to the reclined 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, thereby driving 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, causing the second linkage plate 222 to drive the third linkage plate 223 to rotate counterclockwise; the front end of the third linkage plate 223 moves downward while its rear end moves upward, thereby 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 simultaneously causes the lower end of the backrest linkage assembly to move downward.

A middle portion of the first anti-forward-tilt link 41 is hingedly connected with the first linkage plate 221.

As shown in FIGS. 3-5, the seat bracket further includes a drive mechanism 50, wherein the drive mechanism 50 includes a drive member, a slider 51, a drive link 52, and a transmission link 53; the drive member is drivingly connected with the slider 51 to drive the slider 51 to move along a front-rear direction of the base 10; the drive link 52 extends along the front-rear direction of the base 10, and the transmission link 53 extends along a left-right direction of the base 10; the slider 51 is hingedly connected with a lower end of the drive link 52, and an upper end of the drive link 52 is hingedly connected with the transmission link 53; the transmission link 53 is drivingly connected with the bracket side plate 21; during a process in which the drive member drives the slider 51 to slide, the slider 51 is capable of driving the drive link 52 to rotate, thereby causing the transmission link 53 to move forward and upward; the transmission link 53 drives the backrest mounting plate 31 to move from the retracted position to the reclined position via the bracket side plate 21 and the linkage assembly 22. The drive member drives the slider 51 to slide forward along the front-rear direction of the base 10; a lower end of the drive link 52 rotates relative to the slider 51, and an upper end of the drive link 52 moves forward and upward relative to the base 10, thereby driving the transmission link 53 to move forward and upward; in turn, the transmission link 53 drives the bracket side plate 21, which is drivingly connected therewith, to move forward and upward; the bracket side plate 21 causes the linkage assembly 22 to move forward and upward relative to the base 10.

Specifically, the bracket side plate 21 is provided with a through hole extending therethrough, and the transmission link 53 passes through the through hole. When the transmission link 53 rotates, it drives the front drive plate 54 to move; at the same time, rotation of the transmission link 53 also drives the bracket side plate 21 to move.

As shown in FIGS. 2 and 6, the seat bracket further includes a footrest assembly 60, wherein the footrest assembly 60 includes an inner footrest plate 61, an outer footrest plate 62, a front footrest plate 63, a rear footrest plate 64, a first front footrest link 65, a second front footrest link 66, a rear footrest link 67, a front footrest 68, and a rear footrest 69; a rear end of the outer footrest plate 62 is hingedly connected with the bracket side plate 21, and a front end of the outer footrest plate 62 is hingedly connected with a rear end of the rear footrest plate 64; a rear end of the inner footrest plate 61 is hingedly connected with the bracket side plate 21, and a front end of the inner footrest plate 61 is hingedly connected with a rear end of the front footrest plate 63; a middle portion of the inner footrest plate 61 is hingedly connected with a middle portion of the rear footrest plate 64; a rear end of the first front footrest link 65 is hingedly connected with the middle portion of the rear footrest plate 64, a middle portion of the first front footrest link 65 is hingedly connected with a middle portion of the front footrest plate 63, and a front end of the first front footrest link 65 is hingedly connected with a rear end of the second front footrest link 66; the front footrest 68 is hingedly connected with a front end of the front footrest plate 63 and a front end of the second front footrest link 66, respectively; a lower end of the rear footrest link 67 is hingedly connected with a middle portion of the second front footrest link 66; and the rear footrest 69 is hingedly connected with a front end of the rear footrest plate 64 and an upper end of the rear footrest link 67, respectively.

In the present embodiment, the seat bracket has a symmetrical structure on left and right sides thereof, with the linkage mechanism 20 and the backrest mechanism 30 provided on both sides. Meanwhile, to enhance the stability of the seat bracket, a connecting crossbeam extending in the horizontal direction is provided between the linkage mechanisms 20 on both sides.

The drive member is a linear motor.

In the present embodiment, in an electric solution, the drive mechanism 50 further includes a front drive plate 54, wherein two ends of the front drive plate 54 are hingedly connected with the transmission link 53 and the outer footrest plate 62, respectively. In a non-electric solution, the linkage mechanism 20 further includes a first linkage link 24, a second linkage link 25, and a third linkage link 26; a front end of the first linkage link 24 is hingedly connected with a middle portion of the first linkage plate 221, a rear end of the first linkage link 24 is hingedly connected with an upper end of the second linkage link 25, a middle portion of the second linkage link 25 is hingedly connected with the bracket side plate 21, a lower end of the second linkage link 25 is hingedly connected with a rear end of the third linkage link 26, and a front end of the third linkage link 26 is hingedly connected with the outer footrest plate 62.

During the process in which the drive member drives the slider 51 to slide, the slider 51 is capable of driving the drive link 52 to rotate, which in turn drives the transmission link 53 to rotate; the transmission link 53 drives the front drive plate 54 to move forward, and the front drive plate 54 drives the outer footrest plate 62 to extend relative to the bracket side plate 21; the outer footrest plate 62 drives the rear footrest plate 64 to extend, the rear footrest plate 64 drives the inner footrest plate 61 to extend, and the inner footrest plate 61 drives the front footrest plate 63 to extend; the four-link structure formed by the front footrest plate 63, the front footrest 68, the first front footrest link 65, and the second front footrest link 66 causes the front footrest 68 to extend; the rear footrest plate 64 and the rear footrest link 67 jointly drive the rear footrest 69 to extend, thereby switching the footrest assembly 60 from a folded position to an extended position. The folding process of the footrest assembly 60 is the reverse of the described process and will not be repeated herein.

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 a rear end of the first linkage link 24 to move rearward, which in turn drives the second linkage link 25 to rotate relative to the bracket side plate 21; an upper end of the second linkage link 25 moves rearward while a front end thereof moves forward, and the second linkage link 25 drives the third linkage link 26 to move forward, thereby causing the footrest assembly 60 to extend.

The lying position of the seat bracket corresponds to the footrest assembly in the extended position and the backrest mounting plate 31 in the reclined position; the TV position of the seat bracket corresponds to the footrest assembly in the extended position and the backrest mounting plate 31 in the retracted position; the sitting position of the seat bracket corresponds to the footrest assembly in the folded position and the backrest mounting plate 31 in the retracted position.

As shown in FIGS. 7 and 17, the backrest mechanism 30 further includes a limit knob 37; the limit knob 37 is provided on at least one of the backrest mounting plate 31 and the backrest linkage assembly; the limit knob 37 is capable of abutting against one of the backrest mounting plate 31 and the backrest linkage assembly so as to maintain the backrest mounting plate 31 in the retracted position or the reclined position. The structure utilizing the limit knob 37 to maintain the backrest mounting plate 31 in the retracted position or the reclined position has the advantages of simple construction and ease of installation.

The number of limit knobs 37 can be one or more. The limit knob 37 can be provided on any link of the backrest mechanism, provided that the limit knob 37 is in an abutting state when the backrest mounting plate 31 is in the retracted position or the reclined position. When there are two limit knobs 37, the two limit knobs 37 can abut against different links in the retracted position and the reclined position, respectively.

As shown in FIGS. 7 and 14, a lower end of the backrest mounting plate 31 is provided with an arcuate slot 311; when the backrest mounting plate 31 is in the retracted position, the limit knob 37 abuts against a front end of the arcuate slot 311; and when the backrest mounting plate 31 moves to the reclined position, the limit knob 37 moves rearward relative to the arcuate slot 311 and abuts against the arcuate slot 311. By using the described structure, when the backrest mounting plate 31 rotates, the arcuate slot 311 provides clearance for the backrest mounting plate 31, thereby ensuring smooth rotation of the backrest mounting plate 31.

In the present embodiment, the radius of curvature at the front end of the arcuate slot 311 is smaller than the radius of curvature at a middle portion thereof.

As shown in FIGS. 10 and 20, when the backrest mounting plate 31 is in the reclined position, an included angle G between the first backrest link 32 and the seat frame mounting surface is an acute angle. By using the described acute-angle structure, on the one hand, the front end of the backrest mounting plate 31 can be positioned closer to the seat frame mounting surface, thereby reducing the distance between the bracket side plate 21 and the backrest mounting plate 31. After upholstery installation, this results in zero clearance between the seat cushion and the backrest cushion. While achieving zero clearance, it also prevents the user's clothing from being pulled out during seat deployment due to improper relative displacement between the backrest and the seat portion, thereby providing a zero back-rub comfort experience.

The included angle G between the first backrest link 32 and the seat frame mounting surface refers to the angle between the seat frame mounting surface and the line connecting the hinge point of the first backrest link 32 with the backrest mounting plate 31 and the hinge point of the first backrest link 32 with the first drive link 34.

In the present embodiment, when the backrest mounting plate 31 switches from the retracted position to the reclined position, a rotation angle of the backrest mounting plate 31 relative to the seat frame mounting surface is in a range of 30° to 38°. By using the described angle range, the backrest mounting plate 31 can achieve a larger reclining angle, thereby enabling the backrest to satisfy the zero-wall-clearance characteristic. Furthermore, due to the height-lowering characteristic of the backrest, the backrest is lower, resulting in a more prominent zero-gravity effect and an enhanced user experience.

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°, or any value between 30° and 38°.

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 centerline of the backrest mounting plate 31 with respect to the seat frame mounting surface.

As shown in FIGS. 9 and 19, when the backrest mounting plate 31 is in the retracted position, the distance H between the front end of the backrest mounting plate 31 and the ground is in the range of 328 mm to 380 mm. By using the described dimension range, after installation of the backrest cushion and in the sitting position, the distance between the highest point of the backrest cushion and the ground can reach 965 mm. This helps increase the height of the backrest mounting plate 31, thereby achieving a higher and more comfortable zero-wall-clearance backrest.

In the present embodiment, the first backrest link 32 is relatively long, and in the sitting position, the first backrest link 32 is nearly in a vertical state.

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

Specifically, in the sitting position, the distance between the front end of the backrest mounting plate 31 and the ground is 360 mm; in the TV position, the distance between the front end of the backrest mounting plate 31 and the ground is 328 mm.

It should be noted that the distance between the front end of the backrest mounting plate 31 and the ground refers to the distance from the hinge point of the backrest mounting plate 31 with the first backrest link 32 to the ground.

As shown in FIGS. 9 and 19, when the backrest mounting plate 31 is in the retracted position, the distance H between the front end of the backrest mounting plate 31 and the ground is in the range of 250 mm to 380 mm. By using the described dimension range, after installation of the backrest cushion and in the sitting position, the distance between the highest point of the backrest cushion and the ground can reach 965 mm. This helps increase the height of the backrest mounting plate 31, thereby achieving a higher and more comfortable zero-wall-clearance backrest.

The distance H between the backrest mounting plate 31 and the ground can be 250 mm, 260 mm, 270 mm, 280 mm, 300 mm, 310 mm, 320 mm, 328 mm, 330 mm, 340 mm, 350 mm, 360 mm, 370 mm, 380 mm, or any value between 250 mm and 380 mm.

As shown in FIGS. 2 to 11, embodiment 1 of the present disclosure provides a seat bracket. In embodiment 1, an upper end of the first backrest link 32 is hingedly connected with a front end of the backrest mounting plate 31, and an upper end of the second backrest link 33 is hingedly connected with a rear end of the backrest mounting plate 31; a lower end of the first backrest link 32 is hingedly connected with a middle portion of the first drive link 34, and a lower end of the second backrest link 33 is hingedly connected with a rear end of the first drive link 34; a front end of the first drive link 34 is hingedly connected with the linkage assembly 22, and a front end of the second drive link 35 is hingedly connected with the bracket side plate 21; a rear end of the second drive link 35 is hingedly connected with the first link structure; and the backrest mechanism 30 further includes a limit link 36 that maintains the backrest mounting plate 31 in the retracted position or the reclined position. By using the described seat bracket, when the second link structure deforms, the second drive link 35 can drive the first link structure to deform, thereby causing the backrest mounting plate 31 to recline.

In embodiment 1, the first backrest link 32, the backrest mounting plate 31, the second backrest link 33, and the first drive link 34 together form a first link structure, which is a four-link structure. Reclining of the backrest mounting plate 31 is achieved through deformation of the four-link structure. Furthermore, the provision of the limit link 36 enables the backrest mounting plate 31 to be maintained in the retracted position or the reclined position, thereby preventing deformation of the first link structure and avoiding significant wobbling or even tipping of the recliner.

Additionally, by using the second drive link 35 to hingedly connect the first link structure, formed by the backrest linkage assembly and the backrest mounting plate 31, to the bracket side plate 21, rather than directly hinging the backrest mounting plate 31 to the bracket side plate 21, the design allows the front end of the backrest mounting plate 31 to move a greater distance forward in the lying position, thereby achieving the zero-wall-clearance function.

As shown in FIGS. 7 and 9, a middle portion of the second drive link 35 is hingedly connected with a middle portion of the first backrest link 32; a front end of the limit link 36 is hingedly connected with a rear end of the second drive link 35, and a rear end of the limit link 36 is hingedly connected with a middle portion of the second backrest link 33. By using the described structure, the limit link 36 ensures that, when the second drive link 35 rotates clockwise, it pulls the second backrest link 33 via the limit link 36, thereby causing an upper end of the second backrest link 33 to rotate counterclockwise. This makes deformation of the first link structure smoother and enables smoother forward tilting and reclining of the backrest mounting plate 31.

The first drive link 34 can alternatively be hingedly connected with the second backrest link 33 so as to achieve deformation of the first link structure. When the first drive link 34 is hingedly connected with the second backrest link 33, it can be directly or indirectly connected with the second backrest link 33. For example, in embodiment 1, the limit link 36 is used to achieve an indirect hinged connection with the second backrest link 33.

In embodiment 1, the first backrest link 32, the second drive link 35, the limit link 36, the second backrest link 33, and the first drive link 34 together form a five-link structure, thereby maintaining the backrest mounting plate 31 in the retracted position or the reclined position.

In embodiment 1, a rear end of the fourth linkage plate 224 is hingedly connected with the first drive link 34. When the fourth linkage plate 224 rotates clockwise, a rear end of the fourth linkage plate 224 drives the first drive link 34 to move downward and forward, which in turn causes the first drive link 34 to drive the entire first link structure to move downward and forward. The hinge point between the first drive link 34 and the first backrest link 32 moves in a direction away from the bracket side plate 21. At this time, under the constraint of the second link structure, the first backrest link 32 rotates counterclockwise relative to the second drive link 35, causing the included angle between the first backrest link 32 and the second drive link 35 to gradually increase. The first backrest link 32 drives the front end of the backrest mounting plate 31 to tilt forward, thereby deforming the first link structure. Furthermore, under the pulling action of the limit link 36, the distance between the hinge point of the first backrest link 32 with the backrest mounting plate 31 and the hinge point of the second drive link 35 with the limit link 36 gradually increases, causing the upper end of the second backrest link 33 to gradually move closer to the first backrest link 32, thereby enabling the backrest mounting plate 31 to recline.

In embodiment 1, the limit knob 37 is provided on the second backrest link 33, and the backrest mounting plate 31 abuts against the limit knob 37 in both the retracted position and the reclined position. By arranging the limit knob 37 on the second backrest link 33, only one limit knob 37 is required to restrict the backrest mounting plate 31 in both positions, having the advantages of simple structure and ease of manufacturing.

Therefore, the seat bracket provided in embodiment 1 not only enables the backrest mounting plate 31 to switch between the retracted position and the reclined position, but also allows the front end of the backrest mounting plate 31 to move forward, thereby gradually reducing the distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21. This brings the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21, thereby minimizing the gap between the backrest portion and the seat portion, eliminating the risk of items falling or being pinched, and enhancing the user experience of the sofa.

As shown in FIGS. 12 to 21, embodiment 2 of the present disclosure provides a seat bracket. The difference between embodiment 2 and embodiment 1 lies in that, in embodiment 2, the backrest linkage assembly further includes a third backrest link 38; the first backrest link 32 is hingedly connected with the third backrest link 38; one of an upper end of the first backrest link 32 and an upper end of the second backrest link 33 is hingedly connected with the front end of the backrest mounting plate 31, and the other one of the upper end of the first backrest link 32 and the upper end of the second backrest link 33 is hingedly connected with the rear end of the backrest mounting plate 31; one of the first drive link 34 and the second drive link 35 is hingedly connected with both a lower end of the third backrest link 38 and a lower end of the second backrest link 33; the first backrest link 32, the third backrest link 38, one of the first drive link 34 and the second drive link 35, the second backrest link 33, and the backrest mounting plate 31 together form a first link structure; the first link structure is provided with a movable hinge end; and the other one of a rear end of the first drive link 34 and a rear end of the second drive link 35 is hingedly connected with the movable hinge end. By using the described seat bracket, when the second link structure deforms, the first drive link 34 or the second drive link 35 can drive the first link structure to deform, thereby causing the backrest mounting plate 31 to recline.

It should be noted that, whether the second drive link 35 or the first drive link 34 is hingedly connected with the linkage assembly 22, it is sufficient as long as it enables the backrest linkage assembly to move downward and forward during operation of the linkage assembly 22. In the present embodiment, for ease of arranging each link, a front end of the second drive link 35 is hingedly connected with the bracket side plate 21, and a front end of the first drive link 34 is hingedly connected with the linkage assembly 22.

In embodiment 2, the first backrest link 32, the backrest mounting plate 31, the second backrest link 33, the second drive link 35, and the third backrest link 38 together form a five-link structure. Forward tilting of the backrest mounting plate 31 is achieved by deforming the five-link structure.

In the present embodiment, the movable hinge end can be provided on the first backrest link 32. In other feasible implementations, the movable hinge end can alternatively be provided at an upper end of the third backrest link 38, in which case a middle portion of the third backrest link 38 is hingedly connected with a lower end of the first backrest link 32. It is only required that the deformation of the five-link structure can be realized through the movable hinged end.

Furthermore, the upper end of the first backrest link 32 can be hingedly connected with the front end of the backrest mounting plate 31, in which case the upper end of the second backrest link 33 is hingedly connected with the rear end of the backrest mounting plate 31. Alternatively, the upper end of the first backrest link 32 is hingedly connected with the rear end of the backrest mounting plate 31, and the upper end of the second backrest link 33 is hingedly connected with the front end of the backrest mounting plate 31. It is only required that forward tilting of the front end of the backrest mounting plate 31 can be achieved.

As shown in FIGS. 17 and 19, the movable hinge end is a lower end of the first backrest link 32; a middle portion of the first backrest link 32 is hingedly connected with an upper end of the third backrest link 38; the first drive link 34 is hingedly connected with the second drive link 35; and the first drive link 34, the second drive link 35, the first backrest link 32, and the third backrest link 38 together form a third link structure. By using the described structure, when the second link structure deforms, the second drive link 35 can rotate clockwise relative to the first drive link 34, thereby causing the third link structure to deform. This enables the first drive link 34 to rotate the first backrest link 32 counterclockwise, thereby achieving forward tilting of the front end of the backrest mounting plate 31.

As shown in FIG. 17, a front end of the second drive link 35 is hingedly connected with the bracket side plate 21; a middle portion of the first drive link 34 is hingedly connected with a mid-front portion of the second drive link 35; a lower end of the third backrest link 38 is hingedly connected with a mid-rear portion of the second drive link 35; a lower end of the second backrest link 33 is hingedly connected with a rear end of the second drive link 35; and a lower end of the first drive link 34 is hingedly connected with the linkage assembly 22. By using the described structure, the backrest linkage assembly is connected with the linkage mechanism 20 via the front end of the second drive link 35, thereby enabling the linkage mechanism 20 to drive the backrest linkage assembly to move.

The first link structure, formed by the backrest linkage assembly and the backrest mounting plate 31, is hingedly connected with the bracket side plate 21 via the first drive link 34, rather than the backrest mounting plate 31 being directly hinged with the bracket side plate 21. This design allows the front end of the backrest mounting plate 31 to move a greater distance forward in the lying position, thereby achieving the zero-wall-clearance function.

In embodiment 2, a rear end of the fourth linkage plate 224 is hingedly connected with a lower end of the first drive link 34. When the fourth linkage plate 224 rotates clockwise, it deforms the second link structure; the rear end of the fourth linkage plate 224 drives the first drive link 34 to move downward and forward, which in turn causes the second drive link 35 that is hingedly connected with the first drive link 34 to rotate clockwise relative to the bracket side plate 21, thereby moving the backrest linkage assembly and the backrest mounting plate 31 forward and downward. Furthermore, as the distance between the front end of the second drive link 35 and the lower end of the first drive link 34 increases, the second drive link 35 rotates clockwise relative to the first drive link 34, causing the third link structure to deform. The first drive link 34 drives the first backrest link 32 to rotate counterclockwise relative to the third backrest link 38, thereby causing the upper end of the first backrest link 32 to tilt forward and driving the front end of the backrest mounting plate 31 to tilt forward. At this time, the first link structure deforms, and the distance between the hinge point of the first backrest link 32 with the backrest mounting plate 31 and the hinge point of the second backrest link 33 with the second drive link 35 gradually increases, thereby enabling the backrest mounting plate 31 to recline.

In embodiment 2, the limit knob 37 is provided on the first backrest link 32, and the backrest mounting plate 31 abuts against the limit knob 37 in both the retracted position and the reclined position. By arranging the limit knob 37 on the first backrest link 32, only one limit knob 37 is required to restrict the backrest mounting plate 31 in both positions, having the advantages of simple structure and ease of manufacturing.

Therefore, the seat bracket provided in embodiment 2 not only enables the backrest mounting plate 31 to switch between the retracted position and the reclined position, but also allows the front end of the backrest mounting plate 31 to move forward, thereby gradually reducing the distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21. This brings the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21, thereby minimizing the gap between the backrest portion and the seat portion, eliminating the risk of items falling or being pinched, and enhancing the user experience of the sofa.

It should be noted that the rotation directions of all components in the present disclosure correspond to the perspective of the side view of the seat bracket as shown in FIG. 2.

In yet another embodiment of the present application, a zero wall recliner is provided, including the seat bracket as described above. Since the front end and the rear end of the backrest mounting plate 31 are hingedly connected with the bracket side plate 21 and the linkage assembly 22, respectively, via the backrest linkage assembly, the linkage mechanism 20 is capable of switching the backrest mounting plate 31 between the retracted position and the reclined position through the backrest linkage assembly. Furthermore, when the backrest mounting plate 31 switches between the retracted position and the reclined position, the distance from the point F to the seat frame mounting surface of the bracket side plate 21 is within the preset dimension range, thereby enabling the movement trajectory of the point F to fall within the range of motion of the human lumbar region. This results in a very small displacement of the human lumbar region relative to the seat frame mounting surface, which in turn minimizes the movement of the human lumbar region relative to the seat frame mounting surface during operation of the seat bracket. Consequently, the displacement of the human back relative to the backrest mounting plate 31 is extremely small, producing an “anti-back-rub” effect and thereby enhancing user comfort during use.

As shown in FIGS. 2 to 11, an embodiment of the present disclosure provides a backrest mechanism, including a backrest mounting plate 31, a reclining assembly, a second drive link 35, and a limit structure, wherein the backrest mounting plate 31 has a reclined position in which it is tilted rearward relative to the bracket side plate 21 and a retracted position in which it is retracted relative to the bracket side plate 21; an upper end of the reclining assembly is hingedly connected with a front end of the backrest mounting plate 31 and a rear end of the backrest mounting plate 31, respectively; the reclining assembly and the backrest mounting plate 31 form a first link structure, and a lower end of the reclining assembly has a first hinge end; a front end of the second drive link 35 has a second hinge end; the second drive link 35 is hingedly connected with the first link structure; one of the first hinge end and the second hinge end is hingedly connected with the bracket side plate 21, and the other one of the first hinge end and the second hinge end is hingedly connected with the linkage assembly 22; the second drive link 35, the bracket side plate 21, the linkage assembly 22, and the reclining assembly together form a second link structure; the limit structure is provided on the first link structure and is capable of maintaining the backrest mounting plate 31 in the retracted position or the reclined position.

By applying the technical solution of the present disclosure, the backrest mechanism includes the backrest mounting plate 31, the reclining assembly, the second drive link 35, and the limit structure. When the backrest reclines and the backrest mounting plate 31 switches from the retracted position to the reclined position, the linkage assembly 22 tilts forward relative to the bracket side plate 21. Since the second drive link 35, bracket side plate 21, linkage assembly 22, and reclining assembly together form the second link structure, the forward tilt of the linkage assembly 22 causes the first hinge end to move downward and forward relative to the second hinge end, thereby driving the first link structure, formed by the reclining assembly and the backrest mounting plate 31, to move downward and forward via the first hinge end. At the same time, the first hinge end drives the second drive link 35 to rotate relative to the bracket side plate 21 via the second link structure, causing the rear end of the second drive link 35 to move downward while rotating relative to the bracket side plate 21. The lower end of the first link structure moves in a direction away from the second hinge end. Since the second drive link 35 is hingedly connected with the first link structure, under the constraint of the second drive link 35, the first link structure deforms, causing the backrest mounting plate 31 to recline. Additionally, under the constraint 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 plate 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21. This minimizes the gap between the backrest portion and the seat portion, eliminates the risk of items falling or being pinched, and enhances the user experience of the sofa.

In the present embodiment, since the limit structure is provided on the first link structure, it enables the backrest mounting plate 31 to be maintained in the retracted position or the reclined position, thereby preventing deformation of the first link structure and avoiding significant wobbling or even tipping of the seat. Furthermore, when the backrest mounting plate 31 switches between the retracted position and the reclined position, the limit structure does not restrict the normal rotation of the backrest mounting plate 31.

It should be noted that both the first link structure and the second link structure are multi-link structures, for example, a four-link structure or a five-link structure.

During backrest reclining, the linkage assembly 22 is capable of tilting forward relative to the bracket side plate 21; moreover, a rear end of the linkage assembly 22 is capable of rotating clockwise, thereby driving the link hingedly connected therewith to move downward and forward.

Furthermore, by using the second drive link 35 to hingedly connect the first link structure, formed by the reclining assembly and the backrest mounting plate 31, with the bracket side plate 21, rather than directly hinging the backrest mounting plate 31 with the bracket side plate 21, the design allows the front end of the backrest mounting plate 31 to move a greater distance forward in the lying position, thereby achieving the zero-wall-clearance function.

As shown in FIGS. 2, 7 and 9, the reclining assembly includes a first backrest link 32, a second backrest link 33, and a first drive link 34, wherein an upper end of the first backrest link 32 is hingedly connected with a front end of the backrest mounting plate 31, and a lower end of the first backrest link 32 is hingedly connected with a middle portion of the first drive link 34; an upper end of the second backrest link 33 is hingedly connected with the rear end of the backrest mounting plate 31, and a lower end of the second backrest link 33 is hingedly connected with a rear end of the first drive link 34; the first hinge end is a front end of the first drive link 34; and a rear end of the second drive link 35 is hingedly connected with the first backrest link 32 or the second backrest link 33. By using the described reclining assembly, the first backrest link 32, the second backrest link 33, and first drive link 34 form the first link structure (four-link structure), and the second drive link 35 drives deformation of the first link structure, thereby causing the backrest mounting plate 31 to tilt forward.

As shown in FIGS. 2 and 7, the limit structure includes a limit link 36; a middle portion of the second drive link 35 is hingedly connected with the first backrest link 32; a front end of the limit link 36 is hingedly connected with the rear end of the second drive link 35; and a rear end of the limit link 36 is hingedly connected with the second backrest link 33. By using the limit link 36, when the second drive link 35 rotates clockwise, the limit link 36 pulls the second backrest link 33, causing the upper end of the second backrest link 33 to rotate counterclockwise. This ensures smoother deformation of the first link structure, thereby enabling smoother forward tilting and reclining of the backrest mounting plate 31.

In the present embodiment, a middle portion of the second drive link 35 is hingedly connected with a middle portion of the first backrest link 32; a rear end of the limit link 36 is hingedly connected with a middle portion of the second backrest link 33; the first backrest link 32, the second drive link 35, the limit link 36, the second backrest link 33, and the first drive link 34 jointly form a five-link structure, thereby maintaining the backrest mounting plate 31 in the retracted position or the reclined position.

As shown in FIGS. 2 and 3, the limit structure further includes a limit knob 37 provided on at least one of the first backrest link 32, the second backrest link 33, and the first drive link 34; the limit knob 37 is capable of abutting against one of the backrest mounting plate 31, the second drive link 35, the first backrest link 32, the second backrest link 33, and the first drive link 34, so as to maintain the backrest mounting plate 31 in the retracted position or the reclined position. The structure utilizing the limit knob 37 to maintain the backrest mounting plate 31 in the retracted position or the reclined position has the advantages of simple construction and ease of installation.

As shown in FIG. 2, the limit knob 37 is provided on the second backrest link 33, and the backrest mounting plate 31 abuts against the limit knob 37 in both the retracted position and the reclined position. By arranging the limit knob 37 on the second backrest link 33, only one limit knob 37 is required to restrict the backrest mounting plate 31 in both positions, having the advantages of simple structure and ease of manufacturing.

As shown in FIGS. 2 and 7, the rear end of the backrest mounting plate 31 is provided with an arcuate slot 311; when the backrest mounting plate 31 is in the retracted position, the limit knob 37 abuts against a front end of the arcuate slot 311; when the backrest mounting plate 31 is in the reclined position, the limit knob 37 abuts against a rear end of the arcuate slot 311. By using the described structure, when the backrest mounting plate 31 rotates, the arcuate slot 311 provides clearance for the backrest mounting plate 31, thereby ensuring smooth rotation of the backrest mounting plate 31.

In yet another embodiment of the present application, a seat bracket is provided, including a base 10, a linkage mechanism 20, and a backrest mechanism 30, wherein the linkage mechanism 20 includes a bracket side plate 21 and a linkage assembly 22; the linkage assembly 22 is hingedly connected with the base 10; the bracket side plate 21 is hingedly provided on the linkage assembly 22; one of a first hinge end of the backrest mechanism and a second hinge end of the backrest mechanism is hingedly connected with the bracket side plate, and the other one of the first hinge end of the backrest mechanism and the second hinge end of the backrest mechanism is hingedly connected with the linkage assembly; the backrest mechanism is the backrest mechanism as described above. By using the described seat bracket, when the backrest reclines and the backrest mounting plate 31 switches from the retracted position to the reclined position, the linkage assembly 22 tilts forward relative to the bracket side plate 21. Since the second drive link 35, the bracket side plate 21, the linkage assembly 22, and the reclining assembly together form a second link structure, the forward tilt of the linkage assembly 22 causes the first hinge end to move downward and forward relative to the second hinge end, thereby driving the first link structure, formed by the reclining assembly and the backrest mounting plate 31, to move downward and forward via the first hinge end. At the same time, the first hinge end drives the second drive link 35 to rotate relative to the bracket side plate 21 via the second link structure, causing the rear end of the second drive link 35 to move downward while rotating relative to the bracket side plate 21. The lower end of the first link structure moves in a direction away from the second hinge end. Since the second drive link 35 is hingedly connected with the first link structure, under the constraint of the second drive link 35, the first link structure deforms, causing the backrest mounting plate 31 to recline. Additionally, under the constraint 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 plate 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21. This minimizes the gap between the backrest portion and the seat portion, eliminates the risk of items falling or being pinched, and enhances the user experience of the sofa.

In yet another embodiment of the present application, a zero wall recliner is provided, including the seat bracket as described above. By using the described zero wall recliner, when the backrest reclines and the backrest mounting plate 31 switches from the retracted position to the reclined position, the linkage assembly 22 tilts forward relative to the bracket side plate 21. Since the second drive link 35, the bracket side plate 21, the linkage assembly 22, and the reclining assembly together form a second link structure, the forward tilt of the linkage assembly 22 causes the first hinge end to move downward and forward relative to the second hinge end, thereby driving the first link structure, formed by the reclining assembly and the backrest mounting plate 31, to move downward and forward via the first hinge end. At the same time, the first hinge end drives the second drive link 35 to rotate relative to the bracket side plate 21 via the second link structure, causing the rear end of the second drive link 35 to move downward while rotating relative to the bracket side plate 21. The lower end of the first link structure moves in a direction away from the second hinge end. Since the second drive link 35 is hingedly connected with the first link structure, under the constraint of the second drive link 35, the first link structure deforms, causing the backrest mounting plate 31 to recline. Additionally, under the constraint 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 plate 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21. This minimizes the gap between the backrest portion and the seat portion, eliminates the risk of items falling or being pinched, and enhances the user experience of the sofa.

As shown in FIGS. 12-21, an embodiment of the present disclosure provides a backrest mechanism, including a backrest mounting plate 31, a interconnecting link assembly, and a first drive link 34, wherein the backrest mounting plate 31 has a reclined position in which it is tilted rearward relative to the bracket side plate 21 and a retracted position in which it is retracted relative to the bracket side plate 21; the interconnecting link assembly is hingedly connected with both a front end and a rear end of the backrest mounting plate 31; the interconnecting link assembly and the backrest mounting plate 31 together form a first link structure; the interconnecting link assembly has a first hinge end and a second hinge end; a lower end of the first drive link 34 has a third hinge end; one of the first hinge end and the third hinge end is hingedly connected with the bracket side plate 21, and the other one of the first hinge end and the third hinge end is hingedly connected with the linkage assembly 22; a middle portion of the first drive link 34 is hingedly provided on the interconnecting link assembly; the bracket side plate 21, the linkage assembly 22, the first drive link 34, and the interconnecting link assembly together form a second link structure; an upper end of the first drive link 34 is hingedly connected with the second hinge end; the first drive link 34 is capable of rotating relative to the interconnecting link assembly so as to cause forward tilting of the backrest mounting plate 31 via the second hinge end.

By applying the technical solution of the present disclosure, the backrest mechanism includes the backrest mounting plate 31, the interconnecting link assembly, and the first drive link 34. When the backrest reclines and the backrest mounting plate 31 switches from the retracted position to the reclined position, the linkage assembly 22 tilts forward relative to the bracket side plate 21. Since one of the first hinge end and the third hinge end is hingedly connected with the bracket side plate 21, and the other one of the first hinge end and the third hinge end is hingedly connected with the linkage assembly 22, with a middle portion of the first drive link 34 hingedly provided on the interconnecting link assembly, the forward tilt of the linkage assembly 22 enables the first link structure to move downward and forward either via the first drive link 34 or directly. Furthermore, the third hinge end moves away from the first hinge end, causing the second link structure to deform. The first drive link 34 rotates relative to the interconnecting link assembly, and the first drive link 34 drives the first link structure to deform through the second hinge end, thereby causing the front end of the backrest mounting plate 31 to tilt forward. Additionally, due to the downward movement of the interconnecting link assembly, the backrest mounting plate 31 rotates and reclines. The distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21. This minimizes the gap between the backrest portion and the seat portion, eliminates the risk of items falling or being pinched, and enhances the user experience of the sofa.

It should be noted that both the first link structure and the second link structure are multi-link structures, for example, a four-link structure or a five-link structure.

During backrest reclining, the linkage assembly 22 is capable of tilting forward relative to the bracket side plate 21; moreover, a rear end of the linkage assembly 22 is capable of rotating clockwise, thereby driving the link hingedly connected therewith to move downward and forward.

As shown in FIGS. 12, 17 and 19, the interconnecting link assembly includes a first backrest link 32, a second backrest link 33, a third backrest link 38, and a second drive link 35, wherein the first backrest link 32 is hingedly connected with the third backrest link 38; one of an upper end of the first backrest link 32 and an upper end of the second backrest link 33 is hingedly connected with a front end of the backrest mounting plate 31, and the other one of the upper end of the first backrest link 32 and the upper end of the second backrest link 33 is hingedly connected with a rear end of the backrest mounting plate 31; a lower end of the third backrest link 38 and a lower end of the second backrest link 33 are both hingedly connected with the second drive link 35; the first hinge end is provided on the second drive link 35. By using the described interconnecting link assembly, the first backrest link 32, the backrest mounting plate 31, the second backrest link 33, the second drive link 35, and the third backrest link 38 together form a five-link structure. Forward tilting of the backrest mounting plate 31 is achieved by deforming the five-link structure.

The first link structure, formed by the interconnecting link assembly and the backrest mounting plate 31, is hingedly connected with the bracket side plate 21 via the second drive link 35, rather than the backrest mounting plate 31 being directly hinged with the bracket side plate 21. This design allows the front end of the backrest mounting plate 31 to move a greater distance forward in the lying position, thereby achieving the zero-wall-clearance function.

It should be noted that, whether the second drive link 35 or the first drive link 34 is hingedly connected with the linkage assembly 22, it is sufficient as long as the interconnecting link assembly can be driven to move downward and forward during operation of the linkage assembly 22. In the present embodiment, for ease of arranging each link, a front end of the second drive link 35 is hingedly connected with the bracket side plate 21, and a front end of the first drive link 34 is hingedly connected with the linkage assembly 22.

The second hinge end can be provided either on the first backrest link 32 or on an upper end of the third backrest link 38. At this time, a middle portion of the third backrest link 38 is hingedly connected with a lower end of the first backrest link 32. It is only required that the deformation of the five-link structure can be realized through the second hinge end.

Furthermore, the upper end of the first backrest link 32 can be hingedly connected with the front end of the backrest mounting plate 31, in which case the upper end of the second backrest link 33 is hingedly connected with the rear end of the backrest mounting plate 31. Alternatively, the upper end of the first backrest link 32 can be hingedly connected with the rear end of the backrest mounting plate 31, and the upper end of the second backrest link 33 can be hingedly connected with the front end of the backrest mounting plate 31. It is only required that forward tilting of the front end of the backrest mounting plate 31 can be achieved.

As shown in FIGS. 12 and 17, the second hinge end is a lower end of the first backrest link 32; a middle portion of the first backrest link 32 is hingedly connected with an upper end of the third backrest link 38; the first drive link 34 is hingedly connected with the second drive link 35; the first drive link 34, the second drive link 35, the first backrest link 32, and the third backrest link 38 together form a third link structure. By configuring the third link structure as the described four-link structure, clockwise rotation of the first drive link 34 relative to the second drive link 35 causes deformation of the third link structure, which in turn drives the first backrest link 32 to rotate counterclockwise relative to the third backrest link 38, thereby achieving deformation of the first link structure.

As shown in FIGS. 12 and 13, the first hinge end is a front end of the second drive link 35; a middle portion of the first drive link 34 is hingedly connected with a mid-front portion of the second drive link 35; a lower end of the third backrest link 38 is hingedly connected with a mid-rear portion of the second drive link 35; a lower end of the second backrest link 33 is hingedly connected with a rear end of the second drive link 35. By using the described structure, the interconnecting link assembly is connected with the linkage mechanism via the front end of the second drive link 35, thereby enabling the linkage mechanism to drive the interconnecting link assembly to move.

As shown in FIG. 12, the backrest mechanism further includes a limit knob 37 provided on at least one of the first backrest link 32, the third backrest link 38, the second backrest link 33, and the first drive link 34; the limit knob 37 is capable of abutting against one of the backrest mounting plate 31, the first backrest link 32, the third backrest link 38, the second backrest link 33, and the first drive link 34, so as to maintain the backrest mounting plate 31 in the retracted position or the reclined position. The structure utilizing the limit knob 37 to maintain the backrest mounting plate 31 in the retracted position or the reclined position has the advantages of simple construction and ease of installation.

As shown in FIG. 12, the limit knob 37 is provided on the first backrest link 32, and the backrest mounting plate 31 abuts against the limit knob 37 in both the retracted position and the reclined position. By arranging the limit knob 37 on the first backrest link 32, only one limit knob 37 is required to restrict the backrest mounting plate 31 in both positions, having the advantages of simple structure and ease of manufacturing.

As shown in FIGS. 12 and 17, a front end of the backrest mounting plate 31 is provided with an arcuate slot 311; when the backrest mounting plate 31 is in the retracted position, the limit knob 37 abuts against a front end of the arcuate slot 311; when the backrest mounting plate 31 is in the reclined position, the limit knob 37 abuts against a middle portion of the arcuate slot 311. By using the described structure, when the backrest mounting plate 31 rotates, the arcuate slot 311 provides clearance for the backrest mounting plate 31, thereby ensuring smooth rotation of the backrest mounting plate 31.

In yet another embodiment of the present disclosure, a seat bracket is provided, including a base 10, a linkage mechanism 20, and a backrest mechanism 30, wherein the linkage mechanism 20 includes a bracket side plate 21 and a linkage assembly 22; the linkage assembly 22 is hingedly connected with the base 10; the bracket side plate 21 is hingedly provided on the linkage assembly 22; one of a first hinge end of the backrest mechanism 30 and a third hinge end of the backrest mechanism 30 is hingedly connected with the bracket side plate 21, and the other one of the first hinge end of the backrest mechanism 30 and the third hinge end of the backrest mechanism 30 is hingedly connected with the linkage assembly 22; the backrest mechanism 30 is the backrest mechanism 30 as described above. When the backrest reclines and switches from the retracted position to the reclined position, the linkage assembly 22 tilts forward relative to the bracket side plate 21. Since one of the first hinge end and the third hinge end is hingedly connected with the bracket side plate 21, and the other one of the first hinge end and the third hinge end is hingedly connected with the linkage assembly 22, with a middle portion of the first drive link 34 hingedly provided on the interconnecting link assembly, the forward tilt of the linkage assembly 22 enables the first link structure to move downward and forward either via the first drive link 34 or directly. Furthermore, the third hinge end moves away from the first hinge end, causing the second link structure to deform. The first drive link 34 rotates relative to the interconnecting link assembly, and the first drive link 34 drives the first link structure to deform through the second hinge end, thereby causing the front end of the backrest mounting plate 31 to tilt forward. Additionally, due to the downward movement of the interconnecting link assembly, the backrest mounting plate 31 rotates and reclines. The distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21. This minimizes the gap between the backrest portion and the seat portion, eliminates the risk of items falling or being pinched, and enhances the user experience of the sofa.

In yet another embodiment of the present application, a zero wall recliner is provided, including the seat bracket as described above. When the backrest reclines and switches from the retracted position to the reclined position, the linkage assembly 22 tilts forward relative to the bracket side plate 21. Since one of the first hinge end and the third hinge end is hingedly connected with the bracket side plate 21, and the other one of the first hinge end and the third hinge end is hingedly connected with the linkage assembly 22, with a middle portion of the first drive link 34 hingedly provided on the interconnecting link assembly, the forward tilt of the linkage assembly 22 enables the first link structure to move downward and forward either via the first drive link 34 or directly. Furthermore, the third hinge end moves away from the first hinge end, causing the second link structure to deform. The first drive link 34 rotates relative to the interconnecting link assembly, and the first drive link 34 drives the first link structure to deform through the second hinge end, thereby causing the front end of the backrest mounting plate 31 to tilt forward. Additionally, due to the downward movement of the interconnecting link assembly, the backrest mounting plate 31 rotates and reclines. The distance between the front end of the backrest mounting plate 31 and the rear end of the bracket side plate 21 gradually decreases, bringing the front end of the backrest mounting plate 31 closer to the seat frame of the bracket side plate 21. This minimizes the gap between the backrest portion and the seat portion, eliminates the risk of items falling or being pinched, and enhances the user experience of the sofa.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and further it should be understood that the terms "includes" and/or "including, " when used in this description, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.