ES2881348T3 - Sofa and sofa support structure for the same - Google Patents

Abstract

A sofa support structure (100) comprising: a footrest connection assembly (10), a lumbar support assembly (20), a transmission bar assembly and a cushion support (40); the footrest connection assembly (10), the lumbar support assembly (20) and the transmission rod assembly are arranged on the cushion support (40); the transmission bar assembly is configured to drive the lumbar support assembly (20) to be retracted and extended, wherein the transmission bar assembly is a transmission bar (30), a first end of the transmission bar (30) is pivotally connected to the lumbar support assembly (20), and a second end of the transmission rod (30) is pivotally connected to the footrest connection assembly (10); the lumbar support assembly (20) comprises a first connection assembly (21), a second connection assembly (22), a third connection assembly (23) and a lumbar support (24), wherein the first connection assembly (21) is pivotally connected to the transmission bar (30) and cushion support (40), respectively; the second connection assembly (22) is pivotally connected to the cushion support (40) and the lumbar support (24), respectively; the third link assembly (23) is pivotally connected to the first link assembly (21) and the second link assembly (22), respectively; characterized in that the footrest connection assembly (10) comprises: a fifth connection (11), a first end of the fifth connection (11) is pivotally connected to the cushion support (40) and to the transmission bar (30 ); a sixth link (12), a first end of the sixth link (12) is pivotally connected to a second end of the fifth link (11); a seventh link (13), a first end of the seventh link (13) is pivotally connected to a second end of the sixth link (12); an eighth connection (14), a first end of the eighth connection (14) is pivotally connected to a second end of the seventh connection (13); a ninth link (15), a first end of the ninth link (15) is pivotally connected to a second end of the eighth link (14), a second end of the ninth link (15) is pivotally connected to the cushion support (40), the ninth connection (15) is fixedly connected to an external drive device by a first clamp (16); a footrest bracket (17) pivotally connected to the seventh connection (13); and a tenth link (18), a first end of the tenth link (18) is pivotally connected to the first end of the eighth link (14), and a second end of the tenth link (18) is pivotally connected to the footrest support (17).

Description

DESCRIPTION

Sofa and sofa support structure for the same

Cross reference with related requests

The present application is based on and claims priority from Chinese patent application number CN201910263301.6, filed on April 2, 2019.

Technical field

The present description relates to smart furniture, and in particular to a sofa support structure and a sofa having the sofa support structure.

Background

In everyday life, a sofa has become necessary and common. An adjustable sofa can be adjusted to its own inclination by means of an internal structure for the sofa support. However, the internal structure for the sofa support includes many elements and is more complicated, and its stability is insufficient.

Document CN 103622360 A describes a multifunctional sofa comprising a sofa main body and a sofa support connected to the main body of the sofa in an adaptive manner, wherein the main body of the sofa comprises a seat cushion, a pedal, a backrest and armrests; The sofa support comprises a seat cushion support, a connecting rod assembly that is disposed below the seat cushion support and is hinged to the seat cushion support, a pedal support that is hinged to the seat cushion support. seat and connecting rod assembly respectively and can be extended and folded, an arc-shaped support plate that is hinged to the bottom of the connecting rod assembly and is used to support the seat cushion support , a slide bar slidably disposed on the arc-shaped support plate and a back support disposed at the rear end of the seat cushion support; the back surface of the backrest is arc-shaped and connected to the backrest support in an adaptive manner; One side of the backrest support is hinged to the slide bar and the other side of the backrest support is hinged to the seat cushion support.

Document CN 104720419 A describes a mechanical extension device for a mobile sofa and provides the mechanical extension device for the mobile sofa and a connecting rod device. According to the device, the design of the connecting rod is adopted; the pieces are connected via rivets.

However, the prior art does not describe the distinctive features in the characterization part of claim 1.

Compendium

To solve the above problem, the present description provides a sofa support structure according to claim 1 and a sofa, which is simpler and has good stability. Other advantageous embodiments are the subject of the dependent claims.

The sofa support structure includes according to the invention a footrest connection assembly, a lumbar support assembly, a transmission rod assembly and a cushion support. The footrest connection assembly, lumbar support assembly, and transmission rod assembly are arranged on the cushion support. The transmission rod assembly is configured to actuate the lumbar support assembly to retract and extend. The busbar assembly is a busbar. A first end of the transmission bar is rotatably connected to the lumbar support assembly and a second end of the transmission bar is pivotally connected to the footrest connection assembly. The lumbar support assembly includes according to the invention a first connection assembly, a second connection assembly, a third connection assembly, and a lumbar support. The first connection assembly is pivotally connected to the transmission rod and the cushion support, respectively. The second connection assembly is pivotally connected to the cushion support and the lumbar support, respectively. The third connection assembly is pivotally connected to the first connection assembly and the second connection assembly, respectively. The footrest connection assembly includes according to the invention a fifth connection, a sixth connection, a seventh connection, an eighth connection, a ninth connection, a footrest bracket and a tenth connection. A first end of the fifth connection is pivotally connected to the cushion bracket and the transmission rod. A first end of the sixth connection is pivotally connected to a second end of the fifth connection. A first end of the seventh connection is pivotally connected to a second end of the sixth connection. A first end of the eighth connection is pivotally connected to a second end of the seventh connection. A first end of the ninth connection is pivotally connected to a second end of the eighth connection. A second end of the ninth connection is pivotally connected to the cushion support. The ninth connection is fixedly connected to an external actuator by a first clamping. Footrest bracket is pivotally connected to the seventh connection. And a first end of the tenth connection is pivotally connected to the first end of the eighth connection, and a second end of the tenth connection is further pivotally connected to the footrest bracket.

The first connection set may include a second connection, a third connection, and a fourth connection. A first end of the second connection can be pivotally connected to the transmission bar. A first end of the third connection can be pivotally connected to the first end of the second connection, and a second end of the third connection can be pivotally connected to the cushion support. A first end of the fourth connection can be pivotally connected to a second end of the second connection, and a second end of the fourth connection can be pivotally connected to the cushion support.

The second connection set may include an eleventh connection, a twelfth connection, and a thirteenth connection. A first end of the eleventh link can be pivotally connected to the lumbar support. A first end of the twelfth connection may be pivotally connected to a second end of the eleventh connection by a first pivot. And a first end of the thirteenth connection is pivotally connected to the first end of the twelfth connection by a second pivot. A central part of the thirteenth connection can be pivotally connected to the cushion support. And a second end of the thirteenth connection can be pivotally connected to the lumbar support.

The lumbar support may include a limiting element configured to limit the eleventh connection.

The third connection set may include a fourteenth connection, a fifteenth connection, a sixteenth connection, a seventeenth connection, an eighteenth connection, a nineteenth connection, a twentieth connection, and a twenty-first connection. A first end of the fourteenth connection can be pivotally connected to a second end of the twelfth connection. A first end of the fifteenth connection can be pivotally connected to a second end of the fourteenth connection. A first end of the sixteenth connection can be pivotally connected to a second end of the fifteenth connection. A first end of the seventeenth connection can be pivotally connected to a second end of the sixteenth connection. A first end of the eighteenth connection can be pivotally connected to a second end of the seventeenth connection. A first end of the nineteenth connection can be pivotally connected to a second end of the eighteenth connection and a second end of the nineteenth connection can be pivotally connected to the fifteenth connection. A first end of the twentieth connection can be pivotally connected to the eighteenth connection and a second end of the twentieth connection can be pivotally connected to the fifteenth connection. A first end of the twenty-first connection can be pivotally connected to the twenty-first connection and a second connection of the twenty-first connection can be pivotally connected to the seventeenth connection. The sofa support structure may further include a second clamp disposed at the fifteenth connection and fixedly connected to the external actuator.

The first connection set may further include a twenty-second connection. A first end of the twenty-second connection can be pivotally connected to the second connection, and a second end of the twenty-second connection can be pivotally connected to the sixteenth connection.

A sofa including the sofa support structure is further provided.

The provided sofa support structure and the sofa have the following advantages. The transmission rod assembly can be driven by the footrest connection assembly and further actuates the lumbar support assembly to rotate through the transmission rod assembly. So that the supporting structure of the sofa can be adjusted to be in a folded or unfolded state. In addition, the lumbar support assembly can be driven to rotate and unfold only by the single drive rod, which effectively simplifies the process of driving the lumbar support assembly and the structure of the sofa support structure, and as As a result, it has better stability.

Brief description of the drawings

Figure 1 is a perspective view of one embodiment of a sofa support structure in a fully deployed state.

Figure 2 is an enlarged partial view of a part of the support structure of the sofa of Figure 1.

Figure 3 is a perspective view of the sofa support structure of Figure 1 in a partially deployed state.

Figure 4 is a perspective view of one embodiment of the sofa support structure of Figure 1 in a folded state.

Detailed description

The embodiments of the present description will be described in detail below, and examples of the embodiments will be illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to explain the present description, and should not be construed as limiting the present description.

It should be noted that when an element is said to be "mounted on" another element, it may be arranged directly or indirectly on another element. When an item is considered "attached" to another item, it can be directly or indirectly attached to another item.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art for which this description is claimed. The terminology used in the description herein is for the purpose of describing particular embodiments and is not intended to limit the description. The terms "or / and" as used herein include any and all combinations of one or more of the associated listed items.

Referring to Figure 1 and Figure 2, an embodiment of a sofa support structure 100 is provided. The sofa support structure 100 can be used on a sofa, a lounger, and other sofa-like furniture.

The sofa support structure 100 includes a footrest connection assembly 10, a lumbar support assembly 20, a transmission rod assembly, and a cushion support 40. The footrest connection assembly 10, the lumbar support assembly 20 and the transmission rod assembly are disposed on the cushion support 40. The transmission rod assembly is configured to actuate the lumbar support assembly 20 to retract and extend. The transmission rod assembly only includes a single transmission rod 30. A first end of the transmission rod 30 is rotatably connected to the lumbar support assembly 20. And a second end of the transmission rod 30 is connected in a rotational manner. rotatably to the footrest connection assembly 10. The footrest connection assembly 10 can be pivotally connected to an external actuator configured to actuate the footrest connection assembly 10.

Referring to Figure 4, the sofa support structure 100 may be in a folded state. When the footrest connection assembly 10 is actuated by the external actuator to extend and unfold, the transmission rod 30 will be actuated by the footrest connection assembly 10 to cause the lumbar support assembly 20 to rotate and unfold. The lumbar support assembly 20 can be driven to deploy solely by the single drive rod 30, which effectively simplifies the process of operating the lumbar support assembly 20 and the structure of the sofa support structure 100 and, as As a result, it has better stability.

The lumbar support assembly 20 includes a first connection assembly 21, a second connection assembly 22, a third connection assembly 23, and a lumbar support 24. The first connection assembly 21 is pivotally connected to the transmission rod 30 and cushion support 40, respectively. Second connection assembly 22 is pivotally connected to cushion support 40 and lumbar support 24, respectively. The third connection assembly 23 is pivotally connected to the first connection assembly 21 and the second connection assembly 22, respectively. The first connection assembly 21 is movable upon actuation of the footrest connection assembly 10, resulting in the second connection assembly 22 and the third connection assembly 23 moving. Then, the lumbar support 24 will move along with the movement of the second connection assembly 22, resulting in it being deployed. The lumbar support 24 can be varied between the deployed state and the folded state. The lumbar support 24 may have a first deployment angle in the actuation process of the footrest connection assembly 10. The first deployment angle and the height of the lumbar support 24 are adjustable.

The first connection assembly 21 may include a second connection 211, a third connection 212, and a fourth connection 213. A first end of the second connection 211 is pivotally connected to the transmission bar 30. A first end of the third connection 212 is pivotally connected to the first end of the second connection 211. A second end of the third connection 212 is pivotally connected to the cushion support 40. And a first end of the fourth connection 213 is pivotally connected to a second end of the second connection 211, and a second end of the fourth connection 213 is pivotally connected to the cushion support 40. The transmission rod 30 can be configured to actuate the first connection assembly 21 and be movable upon actuation of the footrest connection assembly 10. With actuation of the transmission bar 30, the second connection 211, the third connection 212 and the fourth connection 213 are will move correspondingly, resulting in the first connection assembly 21 unfolding. The first connection assembly 21 can be varied between the unfolded state and the folded state.

It is understood that a plurality of through holes (not shown) may be provided in the second connection 211, so that one skilled in the art can install other items such as tube fittings, if necessary. As shown in Figure 1, the first end of the transmission bar 30 can be bent, and the The first end of the transmission bar 30 is pivotally connected to the first end of the second connection 211 by a pivot that is approximately one third of the first end of the second connection 211. It is understood that, the first end of the second connection Transmission 30 can be pivotally connected to other parts of the second connection 211 as needed.

As shown in Figure 1, the footrest connection assembly 10 may include a fifth connection 11, a sixth connection 12, a seventh connection 13, an eighth connection 14, and a ninth connection 15. A first end of the fifth connection ( 11) is pivotally connected to the cushion bracket 40 and to the transmission rod 30. A first end of the sixth connection 12 is pivotally connected to a second end of the fifth connection 11. A first end of the seventh connection 13 is pivotally connected to a second end of the sixth connection 12. A first end of the eighth connection 14 is pivotally connected to a second end of the seventh connection 13. A first end of the ninth connection 15 is connected in a pivotally to a second end of the eighth connection 14. A second end of the ninth connection 15 is pivotally connected to the cushion support 40.

The footrest connection assembly 10 may further include a first clamp 16. The first clamp 16 may be disposed on the ninth connection 15. The first clamp 16 may be connected to an external actuator, such as a motor or a pneumatic actuator. That is, the ninth connection 15 is fixedly connected to the external actuator via the first clamp 16. The first clamp 16 can be actuated to move by the external actuator, resulting in the ninth connection 15 moving and the fifth connection 11, sixth connection 12, eighth connection 14 and seventh connection 13 move correspondingly. Thus, the footrest connection assembly 10 will unfold or collapse. The footrest connection assembly 10 can be varied between the unfolded state and the folded state. When the fifth connection 11 moves, the transmission rod 30 will move along with it, resulting in that each connection of the first connection assembly 21 moves and can be folded or unfolded. The seventh connection 13 can be triangular in shape. The seventh connection 13 may have a third end in addition to the first end of the seventh connection 13 and the second end of the seventh connection 13.

The footrest connection assembly 10 may further include a footrest bracket 17 and a footrest bracket 18. The footrest bracket 17 is pivotally connected to the third end of the seventh connection 13. A first end of the tenth connection 18 is pivotally connected to the first end of the eighth connection 14, and a second end of the tenth connection 18 is pivotally connected to the footrest bracket 17. When a user uses the sofa that includes the sofa support structure 100, the The feet may be on the footrest bracket 17. The footrest bracket 17 can be actuated to move and rotate synergistically with each connection of the footrest connection assembly 10, in order to facilitate the setting of a second deployment angle of the footrest bracket. footrest 17. It can effectively improve the comfort of the user using the sofa that has the sofa support structure 100. When the sofa support structure 100 is In the deployed state, each connection of the footrest groups 10 can cooperate with each other to support the footrest support 17, thus improving the stability of the footrest support 17 in use.

The second connection assembly 22 may include an eleventh connection 221, a twelfth connection 222, and a thirteenth connection 223. A first end of the eleventh connection 221 is pivotally connected to the lumbar support 24. A first end of the twelfth connection 222 is pivotally connected to a second end of the eleventh connection 221 by a first pivot. A first end of the thirteenth connection 223 is pivotally connected to the first end of the twelfth connection 222 by a second pivot, a middle portion of the thirteenth connection 223 is pivotally connected to the cushion support 40, and a second end of the thirteenth connection 223 is pivotally connected to the lumbar support 24. The lumbar support 24 may include a limiting element 241 configured to limit the eleventh connection 221, especially an angle of rotation of the first end of the eleventh connection 221. That is, when the second connection assembly 22 is in the deployed state, the angle of rotation of the first end of the eleventh connection 221 can be limited by the limiting element 241, to limit the first angle of deployment of the lumbar support 24. The lumbar support 24 can be supported by the synergistic action of the limiting element 241 and the second connection assembly 22.

It should be noted that the lumbar support 24 can be "L" shaped, so that the lumbar support 24 can be adapted to the structure of a sofa back of the sofa. Furthermore, the thirteenth connection 223 is shaped like a "U". The thirteenth connection 223 has the first end, the second end, and the middle portion between the first end and the second end.

The third connection set 23 may include a fourteenth connection 231, a fifteenth connection 232, a sixteenth connection 233, a seventeenth connection 234, an eighteenth connection 235, a nineteenth connection 236, a twentieth connection 237, and a twenty-first connection 238. A A first end of the fourteenth connection 231 is pivotally connected to a second end of the twelfth connection 222. A first end of the fifteenth connection 232 is pivotally connected to a second end of the fourteenth connection 231. A first end of the Sixteenth connection 233 is pivotally connected to a second end of fifteenth connection 232. A first end of seventeenth connection 234 is pivotally connected to a second end of sixteenth connection 233. A first end of the eighteenth connection 235 is pivotally connected to a second end of the seventeenth connection 234. A first end of the nineteenth connection 236 is pivotally connected to a second end of the eighteenth connection 235, and a second end of the Nineteenth connection 236 is pivotally connected to fifteenth connection 232. A first end of twentieth connection 237 is pivotally connected to eighteenth connection 235, and a second end of twentieth connection 237 is pivotally connected to fifteenth connection. connection 232. A first end of the twenty-first connection 238 is pivotally connected to the twenty-first connection 237, and a second end of the twenty-first connection 238 is pivotally connected to the seventeenth connection 234. In addition, a second clamp 50 in the fifteenth connection 232 and fixedly connected to the external actuator. The first clamp 16 and the second clamp 50 can be located at two ends of the external actuator, respectively.

The first connection assembly 21 further comprises a twenty-second connection 214. A first end of the twenty-second connection 214 is pivotally connected to the second connection 211, and a second end of the twenty-second connection 214 is pivotally connected to the sixteenth connection 233. So that the twenty-second connection 214 is driven by the second connection 211 to drive the sixteenth connection 233 to move, and further drives the other connections of the third connection set 23 to move. The third connection assembly 23 can be varied from the folded state to the unfolded state or from the unfolded state to the folded state. Thus, the third connection assembly 23 can move with the actuation of the twenty-second connection 214 of the first connection assembly 21 and cooperate with the second connection assembly 22 to dynamically adjust the lumbar support 24.

It should be noted that in the above embodiments, each of the connections can be connected by hinges, rivets or the like.

In one example, the external actuator mounted on the first clamp 16 and the second clamp 50 can be a motor, and a process of movement of the sofa support structure 100 can be described as follows.

The sofa support structure 100 is initially folded (as shown in Figure 4). Then the motor will drive the first clamp 16, then the ninth connection 15 will be driven to move, which will lead to the fifth connection 11, the sixth connection 12, the seventh connection 13, the eighth connection 14 and the tenth connection 18 move together. That is, the footrest connection assembly 10 will adapt to the deployed state from the folded state. At the same time, the footrest bracket 17 will rotate away from the cushion bracket 40 when the fifth connection 11, the sixth connection 12, the seventh connection 13, the eighth connection 14, the ninth connection 15 and the tenth connection 18 move together. That is, the footrest bracket 17 will adapt to the unfolded state from the folded state (as shown in Figure 3).

When the fifth connection 11 is moving, the transmission rod 30 will be driven to move and rotate by the fifth connection 11, then the second connection 211, the third connection 212, the fourth connection 213, the twenty-second connection 214 will move together. The first connection assembly will adapt to the unfolded state from the folded state (as shown in Figure 4).

The second end of the twenty-second connection 214 is pivotally connected to the sixteenth connection 233, so that when the twenty-second connection 214 is moving, the sixteenth connection 233 will move together. Consequently, the fourteenth connection 231, the fifteenth connection 232, the sixteenth connection 233, the seventeenth connection 234, the eighteenth connection 235, the nineteenth connection 236, the twentieth connection 237, and the twenty-first connection 238 will move together. The third connection assembly 23 will adapt to the unfolded state from the folded state (as shown in Figure 1).

When the fourteenth connection 231 is moving, the twelfth connection 222 will be driven to move by the fourteenth connection 231. Then the eleventh connection 221 and the thirteenth connection 223 will be driven to move along with the twelfth connection 222. The Lumbar support 24 will move in conjunction with the movement of the eleventh connection 221 and the thirteenth connection 223. The lumbar support 24 may have a first angle of deployment in the process of actuation of the footrest connection assembly 10 (as shown in Fig. Figure 1). The first angle of deployment and the height of the lumbar support 24 are adjustable.

The present description further provides a sofa (not shown). The sofa includes the 100 sofa support frame.

The sofa support structure 100 and the sofa have the following advantages. The footrest connection assembly 10 can be actuated by the external actuation device. Then, the transmission bar 30, the first connection assembly 21, the second connection assembly 22, the third connection assembly 23 and the lumbar support 24 can be operated by the footrest connection assembly 10. So that the structure sofa support 100 can be adjusted to be in the folded or unfolded state. Furthermore, the first connection assembly 21 can be driven to rotate and deploy only by the transmission bar 30, which It effectively simplifies the process of driving the first connection assembly 21 and the structure of the sofa support structure 100, and as a result, it has better stability.

Claims (8)

A sofa support structure (100) comprising: a footrest connection assembly (10), a lumbar support assembly (20), a transmission bar assembly, and a cushion support (40); The footrest connection assembly (10), the lumbar support assembly (20) and the transmission rod assembly are arranged on the cushion support (40); the transmission rod assembly is configured to actuate the lumbar support assembly (20) to be retracted and extended, wherein the transmission rod assembly is a transmission rod (30), a first end of the transmission rod (30) is rotatably connected to the lumbar support assembly (20), and a second end of the transmission rod (30) is pivotally connected to the footrest connection assembly (10); The lumbar support assembly (20) comprises a first connection assembly (21), a second connection assembly (22), a third connection assembly (23) and a lumbar support (24), wherein the first connection assembly (21) is pivotally connected to the transmission bar (30) and the cushion support (40), respectively; The second connection assembly (22) is pivotally connected to the cushion support (40) and the lumbar support (24), respectively; the third connection assembly (23) is pivotally connected to the first connection assembly (21) and the second connection assembly (22), respectively; characterized in that the footrest connection assembly (10) comprises: a fifth connection (11), a first end of the fifth connection (11) is pivotally connected to the cushion bracket (40) and the transmission bar (30); a sixth connection (12), a first end of the sixth connection (12) is pivotally connected to a second end of the fifth connection (11); a seventh connection (13), a first end of the seventh connection (13) is pivotally connected to a second end of the sixth connection (12); an eighth connection (14), a first end of the eighth connection (14) is pivotally connected to a second end of the seventh connection (13); a ninth connection (15), a first end of the ninth connection (15) is pivotally connected to a second end of the eighth connection (14), a second end of the ninth connection (15) is pivotally connected to the cushion support (40), the ninth connection (15) is fixedly connected to an external actuator by a first clamp (16); a footrest bracket (17) pivotally connected to the seventh connection (13); Y a tenth connection (18), a first end of the tenth connection (18) is pivotally connected to the first end of the eighth connection (14), and a second end of the tenth connection (18) is pivotally connected to the footrest bracket (17). The sofa support structure (100) of claim 1, wherein the first connection assembly (21) comprises: a second connection (211), a first end of the second connection (211) is pivotally connected to the transmission bar (30); a third connection (212), a first end of the third connection (212) is pivotally connected to the first end of the second connection (211), a second end of the third connection (212) is pivotally connected to the bracket cushion (40); Y a fourth connection (213), a first end of the fourth connection (213) is pivotally connected to a second end of the second connection (211), and a second end of the fourth connection (213) is pivotally connected to the cushion support (40). The sofa support structure (100) of claim 1 or 2, characterized in that the second connection assembly (22) comprises: an eleventh connection (221), a first end of the eleventh connection (221) is pivotally connected to the lumbar support (24); a twelfth connection (222), a first end of the twelfth connection (222) is pivotally connected to a second end of the eleventh connection (221) by a first pivot (222a); Y a thirteenth connection (223), a first end of the thirteenth connection (223) is pivotally connected to the first end of the twelfth connection (222) by a second pivot (222b), a middle part of the thirteenth connection (223) is pivotally connected to the cushion support (40), a second end of the thirteenth connection (223) is pivotally connected to the lumbar support (24). The sofa support structure (100) of claim 3, characterized in that the lumbar support (24) comprises a limiting element (241) configured to limit the eleventh connection (221). The sofa support structure (100) of claim 3, characterized in that the third connection assembly (23) comprises: a fourteenth connection (231), a first end of the fourteenth connection (231) is pivotally connected to a second end of the twelfth connection (222); a fifteenth connection (232), a first end of the fifteenth connection (232) is pivotally connected to a second end of the fourteenth connection (231); a sixteenth connection (233), a first end of the sixteenth connection (233) is pivotally connected to a second end of the fifteenth connection (232); a seventeenth connection (234), a first end of the seventeenth connection (234) is pivotally connected to a second end of the sixteenth connection (233); an eighteenth connection (235), a first end of the eighteenth connection (235) is pivotally connected to a second end of the seventeenth connection (234); a nineteenth connection (236), a first end of the nineteenth connection (236) is pivotally connected to a second end of the eighteenth connection (235), a second end of the nineteenth connection (236) is pivotally connected to the fifteenth connection (232); a twentieth connection (237), a first end of the twentieth connection (237) is pivotally connected to the eighteenth connection (235), a second end of the twentieth connection (237) is pivotally connected to the fifteenth connection ( 232); Y a twenty-first connection (238), a first end of the twenty-first connection (238) is pivotally connected to the twenty-first connection (237), a second end of the twenty-first connection (238) is pivotally connected to the seventeenth connection (234). The sofa support structure (100) of claim 5, characterized in that it further comprises a second clamp (50) arranged at the fifteenth connection (232) and fixedly connected to the external actuator. The sofa support structure (100) of claim 5, characterized in that the first connection assembly (21) further comprises a twenty-second connection (214), a first end of the twenty-second connection (214) is connected pivotally to the second connection (211) and a second end of the twenty-second connection (214) is pivotally connected to the sixteenth connection (233). A sofa, characterized in that the sofa comprises any of the sofa support structures (100) of claims 1 to 7.