Interlocking device, bracket, seat unit, and seat for zero backrest gap

Abstract

An interlocking device for zero backrest gap, a bracket, a seat unit, and a seat are provided, wherein the interlocking device for zero backrest gap comprises a base (1), an interlocking mechanism (2), a bracket side plate (3), and a backrest mechanism (4), wherein the interlocking mechanism (2) is rotatably connected between the base (1) and the bracket side plate (3), and the backrest mechanism (4) is rotatably connected to the bracket side plate (3) and the interlocking mechanism (2), respectively; a side plate interlocking point (31) and a backrest point (32) are installed on the bracket side plate (3), and the bracket side plate (3) is rotatably connected to the interlocking mechanism (2) at the side plate interlocking point (31), and the bracket side plate (3) is rotatably connected to the backrest mechanism (4) at the backrest point (32); The backrest mechanism (4) includes a backrest mounting member (41) and a backrest interlocking member (42), and when the backrest mechanism (4) is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate interlocking point (31) is an acute angle. The seat bracket can satisfy the design of various styles of seat backrests (5), and the seat backrest (5) of the seat unit can be installed close to the wall without gaps to save space and improve aesthetics.

Description

Technology Field

[0001] The present invention relates to the field of seat bracket technology, and specifically to an interlocking device for zero backrest gap, a bracket, a seat unit, and a seat. Background Technology

[0002] Multifunctional sofas or seats have become widely used furniture in smart home life, and multifunctional sofas can generally be adjusted to a folded position in a normal sitting position, an unfolded position with only the legs extended, and a reclined position with both the legs and back fully extended.

[0003] In mechanical folding or unfolding devices used for position adjustment in conventional technology, when the seat back is leaned against a wall and the backrest mechanism is rotated backward to a reclined position, the seat back comes into contact with the adjacent wall, hindering the rotation of the backrest mechanism. This requires leaving space in advance for the backrest to unfold, which occupies a significant amount of space. Conventional functional seats installed flush against a wall without a gap restrict the movement of the legs and backrest, or limit the angle adjustment of the backrest mechanism and the seat back, resulting in poor seat comfort. Furthermore, conventional seat backs equipped with backrest adjustment functions are limited to only one style. The problem to be solved

[0004] The present invention aims to solve the problems of conventional technology, such as the inability to install the seat backrest flush against a wall without gaps because it occupies a large space, or the poor comfort resulting from limited backrest angle adjustment. means of solving the problem

[0005] To achieve the above objective, the present invention provides an interlocking device for zero backrest gap, and the interlocking device for zero backrest gap

[0006] As an interlocking device for zero backrest gap,

[0007] The apparatus includes a base, an interlocking mechanism, a bracket side plate, and a backrest mechanism, wherein the interlocking mechanism is rotatably connected between the base and the bracket side plate, and the backrest mechanism is rotatably connected to the bracket side plate and the interlocking mechanism, respectively;

[0008] A side plate interlocking point and a backrest point are installed on the bracket side plate, the bracket side plate is rotatably connected to the interlocking mechanism at the side plate interlocking point, and the bracket side plate is rotatably connected to the backrest mechanism at the backrest point;

[0009] The above backrest mechanism includes a backrest mounting member and a backrest interlocking member, and both ends of the backrest mounting member are each rotatably connected between the backrest point and the backrest interlocking member, and when the backrest mechanism is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member and the connecting line of the backrest point and the side plate interlocking point is an acute angle.

[0010] In addition, the bracket side plate includes a backrest connecting part and an L-shaped side plate body, and the side plate body is integrally molded or fixedly connected to the backrest connecting part.

[0011] In addition, the backrest connecting portion is installed at one end of the bracket side plate connected to the backrest mechanism, and the backrest point is installed on the backrest connecting portion.

[0012] In addition, when the backrest mechanism is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member and the connecting line of the backrest point and the side plate linkage point is less than 70°.

[0013] In addition, when the backrest mechanism is deployed to a limit position, the angle β between the connecting line of both ends of the backrest mounting member and the connecting line of the backrest point and the side plate linkage point is less than 45°.

[0014] In addition, a protruding frame mounting portion is installed on the backrest mounting member, and the frame mounting portion is for mounting the seat backrest of the seat, and when the interlocking device is extended to a limit position, the angle γ between the frame mounting portion and the horizontal plane is 35° or less.

[0015] The present invention further provides a seat bracket, wherein the seat bracket comprises a base, an interlocking mechanism, a bracket side plate, and a backrest mechanism, wherein the interlocking mechanism is rotatably connected between the base and the bracket side plate, and the backrest mechanism is rotatably connected to the bracket side plate and the interlocking mechanism, respectively;

[0016] The above-described interlocking mechanism includes a first support member, a swing member, a central connecting member, an interlocking member, and a second support member; the first support member and the second support member are each rotatably connected to both ends of the base, the swing member is connected to the first support member, and both ends of the central connecting member are each connected to the swing member and the interlocking member;

[0017] On the above interlocking member, an interlocking point and a support connection point are installed, and the interlocking member is connected to the central connection member at the interlocking point, and the interlocking member is connected to the second support member at the support connection point, and the connection line between the interlocking point and the support connection point is denoted as L1, and the connection line between the support connection point and the connection point between the second support member and the base is denoted as L2. When the interlocking mechanism is deployed to a limit position, the angle δ between L1 and L2 is 8° to 15°.

[0018] In addition, when the above linkage mechanism is deployed forward to a limit position, the indented angle ε between the second support member and the horizontal plane is less than 42°.

[0019] In addition, if the distance from the above linkage point to the above support connection point is denoted as A1, and the distance from the above support connection point to the connection point between the second support member and the base is denoted as A2, the ratio range of A1 and A2 is 0.6 to 0.75.

[0020] Additionally, a side plate connection point and a rear connection point are further installed on the interlocking member; the side plate connection point is connected to the bracket side plate, and the rear connection point is connected to the backrest mechanism, and during the folding or unfolding process of the interlocking mechanism, the distance H3 from the rear connection point to the bottom surface of the base is 3 cm or more.

[0021] Additionally, a first connection point, a second connection point, and a third connection point are installed on the swing member, and the swing member is rotatably connected to the first support member at the first connection point and rotatably connected to the bracket side plate at the third connection point, and if the distance from the second connection point to the third connection point is denoted as B1 and the distance from the second connection point to the first connection point is denoted as B2, the ratio range of B1 and B2 is 0.6 to 0.7.

[0022] In addition, the angle θ between the connecting line between the second and third connecting points and the connecting line between the second and first connecting points is an acute angle.

[0023] Additionally, it further includes a driving mechanism and a leg mechanism, wherein the leg mechanism is rotatably connected to the front of the bracket side plate and the interlocking mechanism, and the driving mechanism drives the leg mechanism to fold or unfold, thereby controlling the movement of the interlocking mechanism, the bracket side plate, and the backrest mechanism, so that the seat bracket can move between sitting, unfolded, and reclining positions.

[0024] The present invention further provides a seat unit, wherein the seat unit comprises a base, an interlocking mechanism, a bracket side plate, a backrest mechanism, and a seat backrest, wherein the interlocking mechanism is rotatably connected between the base and the bracket side plate, and the backrest mechanism is rotatably connected to the bracket side plate and the interlocking mechanism, respectively;

[0025] A seat frame mounting surface is installed on the outer surface of the bracket side plate, the height of the plane where the seat frame mounting surface is located is lower than the upper edge of the bracket side plate, and the distance H from the highest point of the seat frame mounting surface to the bottom surface of the base is 16cm-19cm;

[0026] The above backrest mechanism includes a backrest mounting member and a backrest interlocking member, wherein the backrest mounting member is rotatably connected to the bracket side plate, and both ends of the backrest interlocking member are rotatably connected to the backrest mounting member and the interlocking mechanism, respectively, and the backrest mounting member is connected to the seat backrest; the seat backrest includes a backrest tail edge, and when the seat bracket is folded to a limit position, a plane perpendicular to the horizontal plane where the backrest tail edge is located is an initial plane, and when the backrest mechanism moves together with the interlocking mechanism and the bracket side plate between the limit positions of folding and unfolding, the rearward movement of the backrest tail edge does not exceed the initial plane.

[0027] Additionally, the seat back further includes a backrest tail wing and a body part, the backrest tail edge is located at the rear edge of the backrest tail wing, the width of the backrest tail wing is greater than that of the body part, and as the seat back rotates by the backrest mechanism, the backrest tail wing can rotate around the seat armrest.

[0028] In addition, when the seat backrest is folded to the limit position, the distance H1 from the tail edge of the backrest to the bottom surface of the base is 70cm-85cm.

[0029] In addition, when the seat backrest is extended to the limit position, the distance H2 from the tail edge of the backrest to the bottom surface of the base is 50cm-65cm.

[0030] The present invention further provides a seat comprising a seat armrest and the seat unit described above, wherein the seat unit is fixed to the inner side of the seat armrest through a bracket side plate. Effects of the invention

[0031] The present invention has the following beneficial effects compared to the prior art.

[0032] By limiting the angular relationship between the backrest connecting part and the backrest mounting member, the present invention ensures that, under the premise of guaranteeing the seat deployment length, the distance the backrest mechanism moves horizontally forward and upward by the interlocking mechanism and the bracket side plate during the deployment process of the seat bracket can offset the distance generated by the backrest mechanism rotating backward, thereby allowing the seat backrest to be installed flush against the wall without gaps, thus further saving space.

[0033] The interlocking mechanism of the present invention optimizes the connection angle and size ratio of the parts to further increase the forward deployment distance of the seat bracket, and reduces the height of the seat frame mounting surface combined with the interlocking mechanism to further reduce the sitting height, thereby improving structural stability.

[0034] The seat back of the present invention is a T-shaped frame structure with a wide backrest tail wing. Compared to conventional floor-type armrest products, the T-shaped seat back allows the backrest tail wing to rotate around the seat armrests on both sides during the unfolding process of the seat unit, and the seat armrests can move together with the side plate interlocking member to increase the surface area of ​​the seat back; the seat back can also be applied to seat styles where the armrests touch the ground, and the design of the seat back and seat armrests is more flexible, allowing it to satisfy various seat designs and providing a more aesthetically pleasing appearance. Brief explanation of the drawing

[0035] Hereinafter, in order to more clearly explain the embodiments of the present invention or the technical means of the prior art, the drawings used to explain the embodiments or prior art are briefly introduced. These are merely some embodiments of the present invention, and a person skilled in the art will be able to obtain other drawings based on these drawings without creative effort. Figure 1 is a schematic diagram of the structure of the seat bracket of the present embodiment. FIG. 2 is a schematic diagram of the structure of the interlocking mechanism and backrest mechanism of the present embodiment. Figure 3 is a schematic diagram of the structure of the interlocking mechanism of the present embodiment. Figure 4 is a drawing of Figure 1 from a different perspective. FIG. 5 is a schematic diagram of the structure in which the seat bracket of the present embodiment is extended to a limit position. FIG. 6 is a schematic diagram of the connection structure of the power transmission mechanism and the driving mechanism of the seat bracket of the present embodiment. FIG. 7 is a schematic diagram of the connection structure of the power transmission mechanism of the seat bracket of the present embodiment. FIG. 8 is a schematic diagram of the structural position of the seat unit of the present embodiment in a sitting position and a lying position. FIG. 9 is a schematic diagram of the structure of a seat unit having a T-shaped seat backrest of the present embodiment. FIG. 10 is a schematic diagram of the structure of a seat unit in which the armrest of the present embodiment touches the ground. Specific details for implementing the invention

[0036] To clarify the objectives, means for solving problems, and advantages of the present invention, the present invention will be described in more detail with reference to specific embodiments and the accompanying drawings. It should be understood that this description is merely illustrative and is not intended to limit the scope of the present invention.

[0037] In describing the present invention, terms such as "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance, or implying a designated technical feature. Accordingly, the features limited to "first" and "second" may explicitly or implicitly include one or more of these features.

[0038] Furthermore, in the present invention, terms such as "mounting" and "connection" should be understood in a broad sense unless specifically stated or limited otherwise. For example, they may be fixed connections, detachable connections, or integral connections; they may be mechanical or electrical connections; they may be direct connections or indirect connections through an intermediate medium; or they may be connections between internal parts of two components. Those skilled in the art will be able to understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0039] Examples

[0040] The present embodiment provides a seat, specifically which may be a commonly seen adjustable sofa, leisure chair, or massage chair, etc. The seat includes a seat unit mounted on the inner side of the seat armrest to adjust the seat position, and the seat unit enables the seat to move between a seated position, an unfolded position, and a reclined position. Here, in the seated position, the leg mechanism and the backrest mechanism of the seat unit are both fully folded to a limit position; in the unfolded position, the leg mechanism unfolds forward while the angle between the backrest mechanism and the seat frame remains unchanged; and in the reclined position, the leg mechanism unfolds forward to a limit position and the backrest mechanism unfolds backward to a limit position. In the present embodiment, the direction of unfolding of the seat leg mechanism is referred to as "forward," and the other direction opposite to this is referred to as "rear."

[0041] Specifically, in this embodiment, the distance generated as the backrest mechanism rotates backward during the unfolding process can be offset by the distance the backrest mechanism moves forward and upward horizontally by the interlocking mechanism and the bracket side plate, thereby maximizing the rear space of the backrest mechanism so that the seat backrest can be in close contact with adjacent objects behind it without any gap, and can be unfolded into a reclined position without any obstruction, for example, installed in close contact with a wall without a gap, where “without a gap” means the effect achieved by saving space.

[0042] As illustrated in FIGS. 1 to 5, the interlocking device for zero backrest gap provided in an embodiment of the present invention comprises a base (1), an interlocking mechanism (2), a bracket side plate (3), and a backrest mechanism (4), wherein the interlocking mechanism (2) is rotatably connected between the base (1) and the bracket side plate (3), and the backrest mechanism (4) is rotatably connected to the bracket side plate (3) and the interlocking mechanism (2), respectively.

[0043] Specifically, a backrest point (32) and a side plate linkage point (31) are installed on the bracket side plate (3), the bracket side plate (3) is rotatably connected to the linkage mechanism (2) at the side plate linkage point (31), and the bracket side plate (3) is rotatably connected to the backrest mechanism (4) at the backrest point (32); the backrest mechanism (4) includes a backrest mounting member (41) and a backrest linkage member (42), and both ends of the backrest mounting member (41) are rotatably connected between the backrest point (32) and the backrest linkage member (42), respectively, and when the backrest mechanism (4) is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate linkage point (31) is an acute angle.

[0044] Specifically, as illustrated in FIGS. 1, 2 and 4, when the backrest mechanism (4) is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate interlocking point (31) is less than 70°, and preferably may be 48°, 50°, 55°, 60°, 65°, or 68°. In this embodiment, when the backrest mechanism (4) is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate interlocking point (31) is 65°. When the backrest mechanism (4) is deployed to a limit position, the interlocking angle β between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate interlocking point (31) is less than 45°, and preferably may be 30°, 35°, 40°, or 43°. Specifically, in this embodiment, when the backrest mechanism (4) is deployed to a limit position, the interlocking angle β between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate interlocking point (31) is 40°. When the backrest mounting member (41) moves backward and downward around the backrest point (32), the interlocking angle α decreases, and the backrest mounting member (41) moves forward together with the bracket side plate (3). Compared to the prior art, the backrest mechanism (4) of the present embodiment sets the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate linkage point (31) to be small in the seated position, thereby reducing the inclination angle of the seat backrest (5) after assembly and reducing the space occupied by the seat backrest (5).This embodiment optimizes and limits the angle of the seat backrest so that the seat backrest folds further in a seated position, thereby occupying less rear space, and ensures that the distance the seat backrest is moved forward by the backrest mechanism during the unfolding process is greater than or equal to the distance the seat backrest rotates backward, that is, during the rotation process of the seat backrest (5), the backrest tail edge (51) does not exceed the initial plane.

[0045] Specifically, the bracket side plate (3) of the present embodiment includes a backrest connecting part (34) and an L-shaped side plate body (33), and the side plate body (33) is integrally molded or fixedly connected to the backrest connecting part (34). The backrest connecting part (34) is installed at one end of the bracket side plate (3) connected to the backrest mechanism (4), and the backrest point (32) is installed on the backrest connecting part (34).

[0046] Specifically, the backrest mounting member (41) is an inverted T-shaped connecting member, and a protruding frame mounting part (411) is installed on the backrest mounting member (41). The frame mounting part (411) is intended to mount the seat backrest (5) of the seat, and when the seat bracket is extended to a limit position, the angle γ between the frame mounting part (411) and the horizontal plane is 35° or less. Preferably, in this embodiment, when extended to a limit position, the angle γ between the frame mounting part (411) and the horizontal plane may be 30°, 32°, or 35°. When the backrest mounting member (41) rotates and extends backward, the angle of attachment with the horizontal plane decreases, that is, the rotation angle increases, thereby further increasing the total extension length of the backrest mechanism (4). The maximum rotation angle range of the backrest mounting part (411) in this embodiment is 28°-35°. Preferably, the maximum rotation angle of the backrest mounting part may be 28°, 30°, 32°, or 35°. If the maximum rotation angle of the backrest mounting part of the present embodiment is increased, the backrest unfolding distance is increased, lowering the head height in a reclining position, so that after unfolding, the legs are higher than the head in a zero-gravity reclining position, thereby improving the comfort of the backrest.

[0047] In this embodiment, a seat frame mounting surface (36) is installed on the outer side of the bracket side plate (3), and the seat frame mounting surface (36) is for mounting a seat frame, and the height of the seat frame mounting surface (36) is lower than the upper edge of the bracket side plate (3), and the distance H from the highest point of the seat frame mounting surface (36) to the bottom surface of the base (1) is 16cm-19cm, and preferably can be 16cm, 17cm, 18cm, or 19cm. In this embodiment, as shown in FIG. 4, a plurality of seat frame mounting surfaces (36) are installed on the outer side of the bracket side plate (3), and the seat frame mounting surfaces (36) are formed into a curved shape integrally with the bracket side plate (3), thereby reducing the overall height of the bracket side plate (3) and the interlocking mechanism (2), shortening the length of the parts within the interlocking mechanism (2) and increasing the strength, and lowering the mounting height of the seat frame to improve the stability of the interlocking mechanism (2), so that the height of the seat frame mounting surfaces of this embodiment can satisfy the design requirements of a high-performance sofa or seat having a low seat height.

[0048] Specifically, the interlocking mechanism (2) of the present embodiment includes a first support member (21), a swing member (22), a central connecting member (23), an interlocking member (24), and a second support member (25); the first support member (21) and the second support member (25) are each rotatably connected to both ends of the base (1), the swing member (22) is connected to the first support member (21), and both ends of the central connecting member (23) are each connected to the swing member (22) and the interlocking member (24).

[0049] Specifically, the interlocking member (24) is provided with four connection points that are rotatably connected to the central connecting member (23), the bracket side plate (3), the second support member (25), and the backrest interlocking member (42), respectively. An interlocking point (241) and a support connection point (242) are provided on the interlocking member (24). The interlocking member (24) is connected to the central connecting member (23) at the interlocking point (241) and is rotatably connected to the second support member (25) at the support connection point (242). If the connection line between the interlocking point (241) and the support connection point (242) is denoted as L1, and the connection line between the support connection point (242), the second support member (25), and the base (1) is denoted as L2, then when the interlocking mechanism (2) is deployed to a limit position, the angle δ between L1 and L2 is 8° to 15°.

[0050] It needs to be explained that the connection line L1 between the linkage point (241) and the support connection point (242), and the connection line L2 between the support connection point (242), the second support member (25), and the base (1) are at the dead point position when the second support member (25) rotates, so in order to ensure smooth rotation of the second support member (25), the angle between L1 and L2 must be greater than 0°. Preferably, in this embodiment, the angle δ between the connection line between the linkage point (241) and the support connection point (242) and the second support member (25) may be 8°, 9°, 10°, 12°, or 15°, and in this case, the second support member can not only rotate smoothly but also increase the deployment distance of the second support member by the linkage member. Preferably, a limit member may be further installed between the second support member (25) and the base (1), and the limit member limits the maximum forward rotation angle of the second support member so that it can rotate smoothly.

[0051] Specifically, when the interlocking mechanism (2) is deployed forward to a limit position, the interlocking angle ε between the second support member (25) and the horizontal plane is less than 42°, and preferably, the interlocking angle ε may be 38°, 40°, or 42°. In this embodiment, the angle at which the second support member (25) rotates forward is increased and the interlocking angle between the bases after rotation is reduced, thereby further increasing the total deployment distance of the seat bracket, so that the component size of the interlocking mechanism of the present invention can be reduced and the total height can be further reduced under the same deployment length conditions.

[0052] Specifically, the ratio range of the distance A1 from the linkage point (241) to the support connection point (242) and the distance A2 from the support connection point (242) to the connection point between the second support member (25) and the base (1) is 0.6 to 0.75, and preferably may be 0.6, 0.65, 0.67, 0.7, or 0.75. Based on the optimization of the rotation angle of the second support member (25) and the ratio of the component length to the unfolded length of the second support member (25) described above, the overall height of the linkage mechanism is reduced, the support strength is increased, and the structural stability is increased within the ratio range of the present embodiment.

[0053] Specifically, a side plate connection point (243) and a back connection point (244) are further installed on the interlocking member (24). The side plate connection point (243) is connected to the bracket side plate (3), that is, the side plate connection point (243) is the same point as the side plate interlocking point (31). The back connection point (244) is connected to the backrest mechanism (4), and during the folding or unfolding process of the interlocking mechanism (2), the distance H3 from the back connection point (244) to the bottom surface of the base (1) is made to be 3 cm or more so that the interlocking member (24) does not come into contact with or interfere with the ground during the movement process.

[0054] Specifically, as illustrated in FIG. 3, a first connection point (221), a second connection point (222), and a third connection point (223) are installed on the swing member (22) of the present embodiment, and the swing member (22) is rotatably connected to the first support member (21) at the first connection point (221), rotatably connected to the central connection member (23) at the second connection point (222), and rotatably connected to the bracket side plate (3) at the third connection point (223). If the distance from the second connection point (222) to the third connection point (223) is denoted as B1 and the distance from the second connection point (222) to the first connection point (221) is denoted as B2, the ratio range between B1 and B2 is 0.6 to 0.7. The angle θ between the connecting line between the second connecting point (222) and the third connecting point (223) and the connecting line between the second connecting point (222) and the first connecting point (221) is an acute angle. Preferably, the angle θ between the connecting line between the second connecting point (222) and the third connecting point (223) and the connecting line between the second connecting point (222) and the first connecting point (221) may be 70°, 72°, 76°, or 80°.

[0055] All of the above-described optimizations of this embodiment further lower the mounting height of the seat frame, thereby increasing the forward travel distance during the deployment process of the seat bracket and securing more space for the rear seat backrest.

[0056] As illustrated in FIGS. 8 to 10, the seat unit of the present embodiment further includes a seat backrest (5), the seat backrest (5) is connected to a backrest mounting member (41), the seat backrest (5) includes a backrest tail edge (51), and when the seat bracket is folded to a limit position, the plane perpendicular to the horizontal plane where the backrest tail edge (51) is located is the initial plane, and when the backrest mechanism (4) moves between the limit positions of folding and unfolding together with the interlocking mechanism (2) and the bracket side plate (3), the rearward movement of the backrest tail edge (51) does not exceed the initial plane.

[0057] Specifically, the seat backrest (5) further includes a backrest tail wing (52) and a body part (53), the body part (53) is connected to a backrest mechanism (4), the backrest tail edge (51) is located at the rear edge of the backrest tail wing (52), the width of the backrest tail wing (52) is greater than that of the body part (53), and as the seat backrest (5) rotates by the backrest mechanism (4), the backrest tail wing (52) can rotate around the seat armrest.

[0058] Specifically, as illustrated in FIG. 8, in this embodiment, the rotation angle of the backrest mechanism (4) is changed due to the structural optimization of the interlocking mechanism (2) and the bracket side plate (3) and the reduction of the overall height, so when the seat backrest (5) is folded to a limit position, the distance H1 from the backrest tail edge (51) to the bottom surface of the base (1) is 70cm-85cm. Preferably, the distance H1 from the backrest tail edge (51) to the bottom surface of the base (1) may be 70cm, 75cm, 78cm, 80cm, or 85cm. When the seat backrest (5) is unfolded to a limit position, the distance H2 from the backrest tail edge (51) to the bottom surface of the base (1) is 50cm-65cm. Preferably, the distance H2 from the backrest tail edge (51) to the bottom surface of the base (1) may be 50cm, 58cm, 60cm, or 65cm. Compared to a conventional seat unit having a mechanical unfolding device, the present embodiment can improve the aesthetics and flexibility of the seat back by reducing the overall height of the seat back of the seat unit.

[0059] Specifically, the seat unit of the present embodiment is fixed to the inner side of the seat armrest (9) through the bracket side plate. In one embodiment, as shown in FIG. 9, when the seat armrest (9) is fixed to the bracket side plate (3), that is, when the seat armrest (9) moves together with the movement of the bracket side plate (3), the seat armrest (9) moves. During the movement of the seat backrest (5) by the backrest mechanism (4), the backrest tail wing (52) rotates around the seat armrest (9). When the backrest mechanism (4) is folded to a limit position, the plane perpendicular to the horizontal plane where the backrest tail edge (51) is located is the initial plane, and during the movement of the seat backrest (5) by the backrest mechanism (4), the movement of the backrest tail edge (51) does not exceed the initial plane. The seat of the embodiment can be designed as a seat style with a T-shaped seat backrest that has a wide tail wing and seat armrests that move together.

[0060] In another embodiment, as illustrated in FIG. 10, when the seat armrest (9) is fixed to the base (1), the seat backrest (5) includes a backrest body (54), and the width of the backrest body (54) is smaller than the distance between the two seat armrests (9). It should be explained that a seat in which the seat armrest (9) is fixed to a horizontal plane, that is, the seat armrest touches the floor, may be described as a seat in which the armrest touches the ground. When the backrest mechanism (4) is folded to a limit position, the plane perpendicular to the horizontal plane where the backrest tail edge (51) is located is the initial plane, and during the process of the seat backrest (5) moving forward by the backrest mechanism (4), the rearward movement of the backrest tail edge (51) does not exceed the initial plane, that is, during the process of the seat backrest (5) rotating and unfolding backward, the tail end edge of the seat moves forward and away from the vertical plane, or moves downward along the initial vertical plane. When the seat is installed with the armrests touching the ground, during the position adjustment process, the seat armrests are fixed and do not move, and the seat backrest (5) is adjusted by moving horizontally and rotating between the two armrests.

[0061] The seat bracket of the present embodiment further includes a leg mechanism (6), the leg mechanism (6) is rotatably connected to the front of the bracket side plate (3), and the leg mechanism (6) unfolds or folds at the front of the bracket side plate.

[0062] The seat bracket of the present embodiment is a structure of two sets of identical brackets installed opposite each other, and the seat bracket further includes two supports, namely a first support (11) and a second support (12), which are installed at each end of the base (1) and connect the two opposing bases (1), and the two opposing bases (1) and the first support (11) and the second support (12) connecting them form a frame structure at the bottom.

[0063] Specifically, as illustrated in FIGS. 6 and 7, the device further includes a power transmission mechanism (7) and a driving mechanism (8), wherein the power transmission mechanism (7) includes an interlocking bracket (71) and a power transmission shaft (72), and both ends of the power transmission shaft (72) are connected to the leg mechanism (6) on both sides to transmit power, one end of the interlocking bracket (71) is connected to the center of the power transmission shaft (72), and the other end of the interlocking bracket (71) is hinge-connected to the sliding block (83) of the driving mechanism (8). Specifically, in some embodiments, a through hole is installed on the bracket side plate (3), and the end of the power transmission shaft (72) passes through the through hole and is connected to the power transmission connecting rod (61) of the leg mechanism (6) installed on the outside of the bracket side plate (3), thereby folding or unfolding the other connecting rod structure of the leg mechanism (6) by the first power transmission connecting rod (61). In another embodiment, a groove or gap through which a power transmission shaft (72) passes is provided on the lower side of the bracket side plate (3). The end of the power transmission shaft (72) passes through the groove or gap and is connected to a power transmission connecting rod (61) of a leg mechanism (6) installed on the outside of the bracket side plate (3). It should be explained that in this embodiment, the length of the power transmission shaft (72) is made greater than the distance between the two bracket side plates (3) so that the inner space of the bracket side plate (3) is small, thereby preventing interference between parts during movement. Specifically, the power transmission shaft (72) may be a power transmission rectangular tube.

[0064] Specifically, the driving mechanism (8) includes a driving motor (81), a slide rail (82), and a sliding block (83), the slide rail (82) is installed parallel to a horizontal plane, and the sliding block (83) is connected to a power transmission shaft (72) through an interlocking bracket (71). Specifically, one end of the slide rail (82) is fixed on a first support (11), the other end of the slide rail (82) is connected to a driving motor (81), and the driving motor (81) is fixed on a second support (12). When the leg mechanism (6) and the backrest mechanism (4) are driven from a folding position to a fully unfolded limit position, the sliding stroke of the sliding block (83) is 26 cm to 33 cm. Preferably, the sliding stroke of the sliding block (83) may be 26 cm, 27 cm, 28 cm, 30 cm, or 33 cm. In this embodiment, when the power transmission shaft (72) is moved from a fully folded limit position to a fully unfolded limit position by the sliding block (83), the forward travel distance of the power transmission shaft (72) is 20 cm or more. Preferably, it may be 20 cm, 22 cm, or 25 cm. For example, in some embodiments, when the maximum sliding stroke of the sliding block (83) is 28 cm, the forward travel distance of the power transmission shaft (72) is driven to be greater than 20 cm.

[0065] In this embodiment, the driving mechanism (8) and the power transmission mechanism (7) cooperate to drive the sliding block (83) so that the sliding stroke of the power transmission shaft (72) becomes longer when the height of the power transmission shaft (72) is smaller, thereby increasing the deployment distance of the seat back mechanism and leg mechanism and providing higher push accuracy and push efficiency. It should be explained that conventional push rod motors must be mounted obliquely on the base, so the stroke of the push rod is longer. In conventional seat driving mechanisms, one end of the slide rail is a free end, and when the sliding block slides on the slide rail, the slide rail swings relative to the base, causing the center of gravity to change, and shaking or jamming is likely to occur during the driving process. Compared to a conventional drive mechanism, the drive mechanism (8) of the present embodiment has a slide rail (82) installed parallel to a horizontal plane and both ends of the slide rail (82) are fixed, and a drive motor (81) drives the sliding block (83) to slide in a straight line on the slide rail (82), and the height of the power transmission shaft (72) is low, and the center of gravity of the power transmission and the center of gravity of the drive mechanism (8) are close to the base, so the drive process is more stable, smooth, and the push accuracy is improved.

[0066] In this embodiment, the driving mechanism (8) drives the power transmission mechanism (7) to move, thereby causing the leg mechanism (6) to unfold forward, and thereby controls the movement of the interlocking mechanism (2), bracket side plate (3), and backrest mechanism (4), so that the seat unit can move between the sitting position, unfolded position, and lying position.

[0067] By limiting the angular relationship between the backrest connecting part and the backrest mounting member, the present invention increases the distance the backrest mechanism moves horizontally forward and upward by means of the interlocking mechanism and the bracket side plate during the deployment process of the seat unit, provided that the seat deployment length is guaranteed. This offsets the distance generated by the backrest mechanism rotating backward, thereby allowing the seat backrest of the seat unit to be installed flush against the wall without gaps, thus further saving space. Through improvements in the combination of the interlocking mechanism, the backrest mechanism, etc., the present invention increases the deployment distance of the seat unit while significantly lowering the sitting height, thereby improving structural stability and seat comfort.

[0068] The seat back of the present invention is a T-shaped frame structure with a wide backrest tail wing. Compared to conventional floor-type armrest products, the T-shaped seat back allows the backrest tail wing to rotate around the seat armrests on both sides during the unfolding process of the seat unit, and the seat armrests can move together with the side plate interlocking member to increase the surface area of ​​the seat back; the seat back can also be applied to seat styles where the armrests touch the ground, and the design of the seat back and seat armrests is more flexible, allowing it to satisfy various seat designs and providing a more aesthetically pleasing appearance.

[0069] The specific embodiments of the present invention described above are used merely to exemplify or explain the principles of the present invention and should not be understood as limiting the present invention. Accordingly, all modifications, equivalent substitutions, improvements, etc. made within the scope of the spirit and scope of the present invention should be included within the scope of protection of the present invention. Explanation of the symbols

[0070] 1: Bass, 2: Interlocking mechanism, 3: Bracket side panel, 4: Backrest mechanism, 31: Side panel interlocking point, 32: Backrest point, 41: Backrest mounting member, 42: Backrest interlocking component, 33: Side panel body, 34: Backrest connecting part, 411: Frame mounting section, 5: Seat backrest, 36: Seat frame mounting surface, 51: Backrest tail edge, 52: Backrest tail wing, 53: Body part, 54: Backrest body, 21: First supporting member, 22: Lack of swing, 23: Central connecting member, 24: Lack of linkage, 25: Second support member, 241: Yeondong branch, 242: Support connection point, 243: Side panel connection point, 244: Rear connection point, 221: First connection point, 222: Second connection point, 223: Third connection point, 6: Leg mechanism, 7: Power transmission mechanism, 8: Driving mechanism, 11: First pedestal, 12: Second pedestal, 61: Power transmission connecting rod, 71: Interlocking bracket, 72: Power transmission shaft, 8: Driving mechanism, 81: Drive motor, 82: Slide rail, 83: Sliding block, 9: Seat armrest.

Claims

Claim 1 As an interlocking device for zero backrest gap, it comprises a base (1), an interlocking mechanism (2), a bracket side plate (3), and a backrest mechanism (4), wherein the interlocking mechanism (2) is rotatably connected between the base (1) and the bracket side plate (3), and the backrest mechanism (4) is rotatably connected to the bracket side plate (3) and the interlocking mechanism (2), respectively; a side plate interlocking point (31) and a backrest point (32) are installed on the bracket side plate (3), and the bracket side plate (3) is rotatably connected to the interlocking mechanism (2) at the side plate interlocking point (31), and the bracket side plate (3) is rotatably connected to the backrest mechanism (4) at the backrest point (32); the backrest mechanism (4) comprises a backrest mounting member (41) and a backrest interlocking member (42), and both ends of the backrest mounting member (41) are each the backrest A linkage device for zero backrest gap, characterized in that it is rotatably connected between a point (32) and a backrest linkage member (42), and when the backrest mechanism (4) is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate linkage point (31) is an acute angle. Claim 2 A device for zero backrest gap, characterized in that, in claim 1, the bracket side plate (3) includes a backrest connecting part (34) and an L-shaped side plate body (33), and the side plate body (33) is integrally molded or fixedly connected to the backrest connecting part (34). Claim 3 A device for zero backrest gap, characterized in that, in paragraph 2, the backrest connecting part (34) is installed at one end of the bracket side plate (3) connected to the backrest mechanism (4), and the backrest point (32) is installed on the backrest connecting part (34). Claim 4 A linkage device for zero backrest gap according to claim 3, characterized in that when the backrest mechanism (4) is folded to a limit position, the angle α between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate linkage point (31) is less than 70°. Claim 5 A linkage device for zero backrest gap according to claim 3, characterized in that when the backrest mechanism (4) is extended to a limit position, the angle β between the connecting line of both ends of the backrest mounting member (41) and the connecting line of the backrest point (32) and the side plate linkage point (31) is less than 45°. Claim 6 A linkage device for zero backrest gap according to claim 3, wherein a protruding frame mounting part (411) is installed on the backrest mounting member (41), and the frame mounting part (411) is for mounting the seat backrest (5) of the seat, and when the linkage device is extended to a limit position, the angle γ between the frame mounting part (411) and the horizontal plane is 35° or less. Claim 7 As a seat bracket, it comprises a base (1), an interlocking mechanism (2), a bracket side plate (3), and a backrest mechanism (4), wherein the interlocking mechanism (2) is rotatably connected between the base (1) and the bracket side plate (3), and the backrest mechanism (4) is rotatably connected to the bracket side plate (3) and the interlocking mechanism (2), respectively; the interlocking mechanism (2) comprises a first support member (21), a swing member (22), a central connecting member (23), an interlocking member (24), and a second support member (25); The first support member (21) and the second support member (25) are each rotatably connected to both ends of the base (1), the swing member (22) is connected to the first support member (21), and both ends of the central connecting member (23) are each connected to the swing member (22) and the interlocking member (24); an interlocking point (241) and a support connection point (242) are installed on the interlocking member (24), the interlocking member (24) is connected to the central connecting member (23) at the interlocking point (241), and the interlocking member (24) is connected to the second support member (25) at the support connection point (242); if the connecting line between the interlocking point (241) and the support connection point (242) is denoted as L1, and the connecting line between the support connection point (242), the second support member (25), and the base (1) is denoted as L2, then the interlocking mechanism (2) reaches a limit position A seat bracket characterized in that, when unfolded, the intersecting angle δ between L1 and L2 is 8° to 15°. Claim 8 A seat bracket according to claim 7, characterized in that when the interlocking mechanism (2) is deployed forward to a limit position, the interlocking angle ε between the second support member (25) and the horizontal plane is less than 42°. Claim 9 A seat bracket according to claim 7, wherein the distance from the linkage point (241) to the support connection point (242) is denoted as A1, and the distance from the support connection point (242) to the connection point between the second support member (25) and the base (1) is denoted as A2, wherein the ratio range of A1 and A2 is 0.6 to 0.

75. Claim 10 A seat bracket according to claim 7, wherein a side plate connection point (243) and a back connection point (244) are further installed on the interlocking member (24); the side plate connection point (243) is connected to the bracket side plate (3), and the back connection point (244) is connected to the backrest mechanism (4), and during the folding or unfolding process of the interlocking mechanism (2), the distance H3 from the back connection point (244) to the bottom surface of the base (1) is 3 cm or more. Claim 11 A seat bracket according to claim 7, wherein a first connection point (221), a second connection point (222), and a third connection point (223) are installed on the swing member (22), and the swing member (22) is rotatably connected to the first support member (21) at the first connection point (221) and rotatably connected to the bracket side plate (3) at the third connection point (223), and the distance from the second connection point (222) to the third connection point (223) is denoted as B1, and the distance from the second connection point (222) to the first connection point (221) is denoted as B2, wherein the ratio range of B1 and B2 is 0.6 to 0.

7. Claim 12 A seat bracket according to claim 11, characterized in that the angle θ between the connecting line of the second connecting point (222) and the third connecting point (223) and the connecting line of the second connecting point (222) and the first connecting point (221) is an acute angle. Claim 13 A seat bracket according to claim 7, further comprising a driving mechanism (8) and a leg mechanism (6), wherein the leg mechanism (6) is rotatably connected to the front of the bracket side plate (3) and the interlocking mechanism (2), and the driving mechanism (8) drives the leg mechanism (6) to fold or unfold, thereby controlling the movement of the interlocking mechanism (2), the bracket side plate (3), and the backrest mechanism (4), so that the seat bracket can move between a sitting position, an unfolded position, and a lying position. Claim 14 As a seat unit, it comprises a base (1), an interlocking mechanism (2), a bracket side plate (3), a backrest mechanism (4), and a seat backrest (5), wherein the interlocking mechanism (2) is rotatably connected between the base (1) and the bracket side plate (3), and the backrest mechanism (4) is rotatably connected to the bracket side plate (3) and the interlocking mechanism (2), respectively; a seat frame mounting surface (36) is installed on the outer surface of the bracket side plate (3), and the height of the plane where the seat frame mounting surface (36) is located is lower than the upper edge of the bracket side plate (3), and the distance H from the highest point of the seat frame mounting surface (36) to the bottom surface of the base (1) is 16cm-19cm; the backrest mechanism (4) comprises a backrest mounting member (41) and a backrest interlocking member (42), and the backrest mounting member (41) is rotatably connected to the bracket side plate (3), and the The two ends of the backrest linkage member (42) are each rotatably connected to the backrest mounting member (41) and the linkage mechanism (2), respectively, and the backrest mounting member (41) is connected to the seat backrest (5); the seat backrest (5) includes a backrest tail edge (51), and when the seat bracket is folded to a limit position, the plane perpendicular to the horizontal plane where the backrest tail edge (51) is located is the initial plane, and when the backrest mechanism (4) moves between the limit positions of folding and unfolding together with the linkage mechanism (2) and the bracket side plate (3), the rearward movement of the backrest tail edge (51) does not exceed the initial plane. Claim 15 A seat unit according to claim 14, wherein the seat backrest (5) further comprises a backrest tail wing (52) and a body part (53), the backrest tail edge (51) is located at the rear edge of the backrest tail wing (52), the width of the backrest tail wing (52) is greater than that of the body part (53), and the backrest tail wing (52) can rotate around the seat armrest during the process of the seat backrest (5) being rotated by the backrest mechanism (4). Claim 16 A seat unit according to claim 14, characterized in that when the seat backrest (5) is folded to a limit position, the distance H1 from the backrest tail edge (51) to the bottom surface of the base (1) is 70cm-85cm. Claim 17 A seat unit according to claim 16, characterized in that when the seat backrest (5) is extended to a limit position, the distance H2 from the backrest tail edge (51) to the bottom surface of the base (1) is 50cm-65cm. Claim 18 A seat comprising a seat armrest (9) and a seat unit according to any one of claims 14 to 17, wherein the seat unit is fixed to the inner side of the seat armrest (9) through a bracket side plate (3).

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