CN111759120A - Sofa support structure and sofa - Google Patents

Abstract

The invention relates to a sofa support structure and a sofa. The sofa support structure includes a foot rod group, a lumbar support rod group, a transmission rod group and a seat cushion bracket. The foot rod group, the lumbar support rod group and the transmission rod group are all arranged on the seat cushion On the bracket, the lumbar support rod group drives the waist support rod group to retract and extend through the transmission rod group, the transmission rod group is a transmission rod, one end of the transmission rod is rotatably connected to the lumbar support rod group, and the other end of the transmission rod is connected to the pedal rod set. In the present invention, the transmission rod group is driven by the pedal rod group, and the lumbar support rod group is further driven to rotate through the transmission rod group, so as to adjust the sofa support structure to a folded state or an unfolded state; The rod group only rotates correspondingly under the driving action of a transmission rod, which effectively simplifies the driving process of the lumbar support rod group, and at the same time, simplifies the structure of the sofa bracket and has better stability.

Description

Sofa bracket structure and sofa

technical field

The invention relates to the technical field of smart home, in particular to a sofa support structure and a sofa.

Background technique

In people's daily life, the sofa has become a very common piece of furniture, among which the adjustable sofa can adjust its own inclination angle through the internal sofa support structure. However, the internal sofa support structure of the adjustable sofa involves many parts, the sofa support structure is more complicated, and the stability is poor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a sofa support structure in view of the problems of complex structure and poor stability in the existing sofa support structure inside the sofa.

In order to achieve the above purpose, the present invention provides a sofa support structure, and its technical scheme is:

A sofa support structure, comprising a foot rod group, a lumbar support rod group, a transmission rod group and a seat cushion support, the above-mentioned foot rod group, the lumbar support rod group and the transmission rod group are all arranged on the above-mentioned seat cushion support, and the above-mentioned lumbar support rod group The group drives the above-mentioned lumbar support rod group to retract and extend through the above-mentioned transmission rod group, the above-mentioned transmission rod group is a transmission rod, one end of the above-mentioned transmission rod is rotatably connected to the above-mentioned lumbar support rod group, and the other end of the above-mentioned transmission rod is connected to the above-mentioned pedal rod set.

In one embodiment, the lumbar support rod set includes a first connecting rod assembly, a second connecting rod assembly, a third connecting rod assembly and a lumbar support bracket, the first connecting rod assembly is connected to the transmission rod and is connected to the seat cushion The bracket is connected; the second link assembly is connected to the seat cushion bracket and is connected to the lumbar support bracket; the third link assembly is connected to the first link assembly and is connected to the second link assembly.

In one embodiment, the above-mentioned first link assembly includes:

a second connecting rod, the first end of the second connecting rod is connected to the transmission rod;

a third connecting rod, the first end of the third connecting rod is connected to the first end of the second connecting rod, and the second end of the third connecting rod is connected to the seat cushion bracket; and

A fourth connecting rod, the first end of the fourth connecting rod is connected to the second end of the second connecting rod, and the second end of the fourth connecting rod is connected to the seat cushion bracket.

In one embodiment, the above-mentioned foot lever set includes:

a fifth connecting rod, the first end of the fifth connecting rod is connected to the seat cushion bracket, and is connected to the transmission rod;

a sixth connecting rod, the first end of the sixth connecting rod is connected to the second end of the fifth connecting rod;

a seventh connecting rod, wherein the first end of the seventh connecting rod is connected to the second end of the sixth connecting rod;

an eighth connecting rod, wherein the first end of the eighth connecting rod is connected to the second end of the seventh connecting rod;

A ninth connecting rod, the first end of the ninth connecting rod is connected to the second end of the eighth connecting rod, the second end of the ninth connecting rod is connected to the seat cushion bracket, and the ninth connecting rod passes through the first The fixing part is fixedly connected with the external driving device;

a foot support, the above-mentioned foot support is connected with the above-mentioned seventh connecting rod; and

The tenth connecting rod, the first end of the tenth connecting rod is connected to the first end of the eighth connecting rod, and the second end of the tenth connecting rod is connected to the pedal bracket.

In one embodiment, the above-mentioned second link assembly includes:

an eleventh connecting rod, wherein the first end of the eleventh connecting rod is connected to the lumbar support;

A twelfth connecting rod, the first end of the twelfth connecting rod is connected to the second end of the eleventh connecting rod; and

A thirteenth connecting rod, the first end of the thirteenth connecting rod is connected to the second end of the twelfth connecting rod, the second end of the thirteenth connecting rod is connected to the seat cushion bracket, and the thirteenth connecting rod The third end of the rod is connected to the lumbar support bracket.

In one embodiment, the lumbar support is provided with a limiting member, and the limiting member is used to limit the position of the eleventh connecting rod.

In one embodiment, the above-mentioned third link assembly includes:

A fourteenth connecting rod, the first end of the fourteenth connecting rod is connected to the third end of the twelfth connecting rod;

A fifteenth connecting rod, the first end of the fifteenth connecting rod is connected to the second end of the fourteenth connecting rod;

A sixteenth connecting rod, the first end of the sixteenth connecting rod is connected to the second end of the fifteenth connecting rod;

A seventeenth connecting rod, the first end of the seventeenth connecting rod is connected to the second end of the sixteenth connecting rod;

An eighteenth connecting rod, the first end of the eighteenth connecting rod is connected to the second end of the seventeenth connecting rod;

A nineteenth connecting rod, the first end of the nineteenth connecting rod is connected to the second end of the eighteenth connecting rod, and the second end of the nineteenth connecting rod is connected to the fifteenth connecting rod;

a twentieth connecting rod, the first end of the twentieth connecting rod is connected to the eighteenth connecting rod, and the second end of the twentieth connecting rod is connected to the fifteenth connecting rod; and

A twenty-first connecting rod, the first end of the twenty-first connecting rod is connected to the twentieth connecting rod, and the second end of the twenty-first connecting rod is connected to the seventeenth connecting rod.

In one embodiment, the sofa support structure further includes a second fixing member, the second fixing member is mounted on the fifteenth connecting rod, and the second fixing member is fixedly connected with the external driving device.

In one embodiment, the first link assembly further includes a twenty-second connecting rod, the first end of the twenty-second connecting rod is connected to the second connecting rod, and the first end of the twenty-second connecting rod is connected to the second connecting rod. The two ends are connected to the sixteenth connecting rod.

A sofa includes the sofa support structure provided by the above technical solution.

In the sofa support structure and sofa provided by the above technical solutions, the transmission rod group is driven by the foot rod group, and the lumbar support rod group is further driven to rotate through the transmission rod group, so that the sofa support structure Adjust to the folded state or the unfolded state; in addition, the lumbar support rod group only rotates correspondingly under the driving action of a transmission rod, which effectively simplifies the driving process of the lumbar support rod group and simplifies the structure of the sofa bracket, which has better stability.

Description of drawings

1 is a schematic structural diagram of a sofa support structure in an unfolded state according to an embodiment of the present invention;

Fig. 2 is the partial structural schematic diagram of the sofa support structure shown in Fig. 1;

3 is a schematic structural diagram of the sofa support structure shown in FIG. 1 in a partially unfolded state;

FIG. 4 is a schematic structural diagram of the sofa support structure shown in FIG. 1 in a folded state;

100, sofa support structure; 10, foot lever group; 11, fifth connecting rod; 12, sixth connecting rod; 13, seventh connecting rod; 14, eighth connecting rod; 15, ninth connecting rod; 16, 17, pedal bracket; 18, tenth connecting rod; 20, lumbar support rod group; 21, first connecting rod assembly; 211, second connecting rod; 212, third connecting rod; 213, first connecting rod Four connecting rods; 214, the twenty-second connecting rod; 22, the second connecting rod assembly; 221, the eleventh connecting rod; 222, the twelfth connecting rod; 223, the thirteenth connecting rod; 23, the third connecting rod Rod assembly; 231, fourteenth connecting rod; 232, fifteenth connecting rod; 233, sixteenth connecting rod; 234, seventeenth connecting rod; 235, eighteenth connecting rod; 236, nineteenth connecting rod ; 237, the twentieth connecting rod; 238, the twenty-first connecting rod; 24, the lumbar support; 241, the limiter; 30, the transmission rod;

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and do not limit the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the specification herein is for the purpose of describing specific embodiments only and is not intended to limit the present invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to FIGS. 1 and 2 , an embodiment of the present invention provides a sofa support structure 100 , and the sofa support structure 100 is suitable for furniture products with similar structures such as sofas and reclining chairs.

It can be understood that the sofa support structure 100 provided in the embodiment is not limited to being installed in a sofa, and those skilled in the art can also install the sofa support structure 100 in furniture products such as reclining chairs.

The sofa support structure 100 includes a foot lever group 10, a lumbar support lever group 20, a transmission lever group and a seat cushion bracket 40, and the foot lever group 10, the lumbar support lever group 20 and the transmission lever group are all arranged on the above-mentioned seat cushion bracket 40, The lumbar support rod group 20 drives the lumbar support rod group 20 to retract and extend through the transmission rod group. The transmission rod group is a transmission rod 30 , one end of the transmission rod 30 is rotatably connected to the lumbar support rod group 20 , and the other end of the transmission rod 30 is connected to the pedal rod group 10 . Wherein, the foot lever group 10 is connected with an external driving device for providing driving force, so as to drive the foot lever group 10 .

When the sofa support structure 100 is initially in the folded state, the foot lever group 10 is extended under the driving action of an external driving device (not shown), and further drives the transmission lever 30 through the foot lever group 10; The lumbar support rod group 20 is driven by the transmission rod 30 as a driving rod, so that the lumbar support rod group 20 is extended from the retracted state to the unfolded state. It should be noted that the lumbar support rod group 20 in the sofa support structure 100 is only driven by one transmission member 30, which effectively simplifies the number of driving members required for the driving process of the lumbar support rod group 20, thereby simplifying the sofa. The number of parts of the support structure 100 effectively improves the stability of the sofa support structure 100 .

The lumbar support rod set 20 includes a first link assembly 21, a second link assembly 22, a third link assembly 23 and a lumbar support bracket 24. The first link assembly 21 is connected to the transmission rod 30 and is connected with the transmission rod 30. The above-mentioned seat cushion bracket 40 is connected; the above-mentioned second link assembly 22 is connected to the above-mentioned seat cushion bracket 40 and is connected to the above-mentioned lumbar support bracket 24; The second link assembly 22 is connected. The first link assembly 21 moves under the driving action of the foot lever set 10, and then the first link assembly 21 will drive the third link assembly 23 and the second link assembly 22 to further The lumbar support bracket 24 is moved under the driving of the second link assembly 22 to change the posture state such as the deployment angle and the height of the lumbar support bracket, so that the entire lumbar support rod set 20 can be adjusted from the retracted state is the expanded state (or, adjusted from the expanded state to the collapsed state).

The first connecting rod assembly 21 includes: a second connecting rod 211, a third connecting rod 212 and a fourth connecting rod 213, the first end of the second connecting rod 211 is connected with the transmission rod 30; the second connecting rod 211 The first end of the third connecting rod 212 is connected to the first end of the third connecting rod 212, and the second end of the third connecting rod 212 is connected to the seat cushion bracket 40; the first end of the fourth connecting rod 213 is connected to the second connecting rod 211. The second end of the fourth connecting rod 213 is connected to the seat cushion bracket 40 . Wherein, the transmission rod 30 is used as the driving rod of the first link assembly 21, and the transmission rod 30 moves under the driving of the pedal rod group 10; and then under the driving action of the transmission rod 30, the second connection rod 211 , the third connecting rod 212 and the fourth connecting rod 213 will move accordingly, so that the first link assembly 20 is adjusted from the retracted state to the unfolded state (or, the first link assembly 21 is adjusted from the unfolded state to collapsed state).

It should be noted that the second connecting rod 212 is provided with a plurality of through holes (not marked in the figure), so that those skilled in the art can install other parts, such as pipe fittings, according to actual needs; in addition, part of the rod section of the transmission rod 30 The curved end of the transmission rod 30 is connected to the second connecting rod 211, and the curved end of the transmission rod 30 is connected to one third of the body of the second connecting rod 211, but this Those skilled in the art can also connect the transmission rod 30 to other positions on the body of the second connecting rod 211 according to the actual situation.

The foot lever set 10 includes: a fifth connecting rod 11 , a sixth connecting rod 12 , a seventh connecting rod 13 , an eighth connecting rod 14 and a ninth connecting rod 15 , and the first end of the fifth connecting rod 11 is connected to On the seat cushion bracket 40 and the first end of the fifth connecting rod 11 is connected with the transmission rod 30, the first end of the sixth connecting rod 12 is connected with the second end of the fifth connecting rod 11, the seventh connecting rod 13 The first end is connected to the second end of the sixth connecting rod 12, the first end of the eighth connecting rod 14 is connected to the first end of the seventh connecting rod 13, and the first end of the ninth connecting rod 15 is connected to the eighth connecting rod 13. The second end of the connecting rod 14 and the second end of the ninth connecting rod 15 are connected to the seat cushion bracket 40 .

In addition, the foot lever set 10 further includes a first fixing member 16 , the first fixing member 16 is mounted on the ninth connecting rod 15 , and the first fixing member 16 is used for external connection with a motor, a pneumatic driving device, etc. The driving device is connected, and then the first fixing member 16 is driven to move by an external driving device. When the first fixing member 16 is driven, the fifth connecting rod 11 , the sixth connecting rod 12 , the seventh connecting rod 13 , the eighth connecting rod 14 and the ninth connecting rod 15 will also move accordingly, and the The foot bar set 10 will also be adjusted from the retracted state to the unfolded state (or the foot bar set 10 is adjusted from the unfolded state to the retracted state); and on the basis of the movement of the fifth connecting rod 11 , the fifth connecting rod 11 The transmission rod 30 will be driven to move, and then the transmission rod 30 will drive each connecting rod in the first link assembly 21 to move, so that the first link assembly 21 can be moved between the retracted state and the unfolded state. convert. It should be noted that the seventh connecting rod 13 has a triangular structure.

In addition, the foot lever set 10 further includes a foot support 17 and a tenth connecting rod 18, the foot support 17 is connected with the third end of the seventh connecting rod 13, and the first end of the tenth connecting rod 18 is connected to the The first end of the eighth connecting rod 14 and the second end of the tenth connecting rod 18 are connected to the pedal bracket 17 . When the user uses the sofa provided with the sofa support structure 100 , the feet can be placed on the footrest support 17 . In addition, the footrest support 17 is performed under the synergistic effect between the various connecting rods in the foot rod set 10 . Rotating to adjust the unfolding angle of the foot support 17, effectively improving the comfort of the user using the sofa with the sofa support structure 100; and when the sofa support structure 100 is in the unfolded state, each The connecting rods cooperate with each other to support the pedal bracket 17 , thereby improving the stability of the pedal bracket 17 during use.

Wherein, the second connecting rod assembly 22 includes: an eleventh connecting rod 221, a twelfth connecting rod 222 and a thirteenth connecting rod 223, the first end of the eleventh connecting rod 221 is connected to the lumbar support bracket 24, The first end of the twelfth connecting rod 222 is connected to the second end of the eleventh connecting rod 221, the first end of the thirteenth connecting rod 223 is connected to the second end of the twelfth connecting rod 222, and the tenth The second ends of the three connecting rods 223 are connected to the seat cushion bracket 40 , and the third ends of the thirteenth connecting rods 223 are connected to the lumbar support bracket 24 . In addition, a limiting member 241 is provided on the lumbar support bracket 24, and the limiting member 241 is used to limit the position of the eleventh connecting rod 221, that is, when the second link assembly 22 is in the unfolded state, the The limiting member 241 limits the movable range of the first end of the eleventh connecting rod 221, so as to limit the deployment angle of the lumbar support bracket 24 through the limiting member 241, so as to pass the limiting member 241 and the second link The synergy of the components 22 keeps the lumbar support 24 stable.

It should be noted that the structure of the lumbar support bracket 24 is in a zigzag shape, so that the lumbar support bracket 24 is matched with the structure of the sofa backrest; The first and second ends of the three connecting rods 223 are located at two ends of the "U"-shaped structure, respectively, and a protrusion is formed at the bottom of the "U"-shaped structure, that is, the third end of the thirteenth connecting rod 223 .

The fourth connecting rod assembly 23 includes: a fourteenth connecting rod 231, a fifteenth connecting rod 232, a sixteenth connecting rod 233, a seventeenth connecting rod 234, an eighteenth connecting rod 235, a nineteenth connecting rod The rod 236 , the twentieth connecting rod 237 and the twenty-first connecting rod 238 , the first end of the fourteenth connecting rod 231 is connected to the third end of the twelfth connecting rod 222 , the first end of the fifteenth connecting rod 232 is One end is connected to the second end of the fourteenth connecting rod 231, the first end of the sixteenth connecting rod 233 is connected to the second end of the fifteenth connecting rod 232, and the first end of the seventeenth connecting rod 234 is connected to the The second end of the sixteenth connecting rod 233, the first end of the eighteenth connecting rod 235 are connected to the second end of the seventeenth connecting rod 234, and the first end of the nineteenth connecting rod 236 is connected to the eighteenth connection The second end of the rod 235 and the second end of the nineteenth connecting rod 236 are connected to the fifteenth connecting rod 232, the first end of the twentieth connecting rod 237 is connected to the eighteenth connecting rod 235 and the The second end of the twenty-first connecting rod 237 is connected with the fifteenth connecting rod 232; the first end of the twenty-first connecting rod 238 is connected with the twentieth connecting rod 237, and the twenty-first connecting rod 238 has a The second end is connected with the seventeenth connecting rod 234 . In addition, a second fixing member 50 is also installed on the fifth connecting rod 232, the second fixing member 50 is fixedly connected with the external driving device, and the first fixing member 16 and the second fixing member 50 are respectively connected to the external both ends of the drive.

The first link assembly 21 is also provided with a twenty-second connecting rod 214, the first end of the twenty-two connecting rod 214 is connected to the second connecting rod 211, and the second connecting rod 214 is connected to the second connecting rod 211. The two ends are connected with the sixteenth connecting rod 233 in the third link assembly 23 , so that the twenty-second connecting rod 214 is driven by the second connecting rod 211 to drive the sixteenth connecting rod 233 to move, and further The other connecting rods in the third link assembly 23 are driven to move, so that the third link assembly 23 is adjusted from the folded state to the unfolded state (or, the third link assembly 23 is adjusted from the unfolded state to the folded state) . Therefore, the third link assembly 23 can move under the driving action of the twenty-second connecting rod 214 in the first link assembly 21 and cooperate with the second link assembly 22 to dynamically adjust the lumbar support bracket 24 's pose.

It should be noted that, in the above embodiments, each connecting rod can be connected by means of hinged, riveted or the like.

Taking the external driving device installed on the first fixing member 16 and the second fixing member 50 as a motor as an example, the adjustment process of the sofa support structure 100 provided in the above embodiment will be described, and the details are as follows:

The sofa support structure 100 is initially in a fully folded state. As shown in FIG. 4 , when the motor drives the first fixing member 16 so that the first fixing member 16 drives the ninth connecting rod 15 , the ninth connecting rod 15 will act as a driving rod. Drive the fifth connecting rod 11 , the sixth connecting rod 12 , the seventh connecting rod 13 , the eighth connecting rod 14 and the ninth connecting rod 15 in the pedal group 10 , so that the pedal assembly 10 is adjusted from the fully retracted state In the unfolded state; at the same time, the foot support 17 will be in the common connection of the fifth connecting rod 11, the sixth connecting rod 12, the seventh connecting rod 13, the eighth connecting rod 14, the ninth connecting rod 15 and the tenth connecting rod 18. Rotate under driving, so that the foot support 17 is adjusted from the retracted state to the unfolded state, and the foot support 17 is moved to the direction away from the seat cushion support 40, as shown in FIG. 3;

In addition, when the fifth connecting rod 11 is in a moving state, the fifth connecting rod 11 will drive the transmission rod 30 to rotate, and then the transmission rod 30 will act as a driving member to drive the second connecting rod 211 , the third connecting rod 212 , the fourth connecting rod 212 and the fourth The connecting rod 213 and the twenty-second connecting rod 214 move, so that the first link assembly 21 is adjusted from the retracted state to the unfolded state, as shown in FIG. 4 ;

The twenty-second connecting rod 214 in the first connecting rod assembly 21 is connected with the sixteenth connecting rod 233 in the third connecting rod assembly 23, and when the twenty-second connecting rod 214 moves, the sixteenth connecting rod 233 is moved. The connecting rod 233 also moves accordingly, so that the sixteenth connecting rod 233 will drive the fourteenth connecting rod 231, the fifteenth connecting rod 232, the seventeenth connecting rod 234, the eighteenth connecting rod 235, the nineteenth connecting rod 236, the twentieth connecting rod 237 and the twenty-first connecting rod 238 move accordingly, so that the third link assembly 23 is adjusted from the retracted state to the unfolded state, as shown in FIG. 1 ;

In addition, when the fourteenth connecting rod 231 in the third link assembly 23 is in a moving state, the fourteenth connecting rod 231 will drive the twelfth connecting rod 222 in the second link assembly 22 to move; further, the The twelfth connecting rod 222 is used as a driving rod in the second link assembly 22 to drive the eleventh connecting rod 221 and the thirteenth connecting rod 223, so that the lumbar support bracket 24 is connected with the thirteenth connecting rod 221 at the eleventh connecting rod 221. Under the common driving of the rod 223, the posture states such as the deployment angle and the height are adjusted; in addition, the rotation range of the eleventh connecting rod 221 is also limited by the limiter 241, so that the second link assembly 22 and the The support structure formed between the respective connecting rods of the third link assembly 23 supports the lumbar support bracket 24 , as shown in FIG. 1 .

In the embodiment of the present invention, there is also provided a sofa (not shown in the figure), and the sofa is installed with the sofa support structure 100 provided in the above-mentioned embodiment.

In the sofa support structure 100 and the sofa provided in the above embodiments, the foot lever group 10 is driven by an external driving device connected to the foot lever group 10 , and further driven by the foot lever group 10 The transmission rod 30, the first connecting rod assembly 21, the second connecting rod assembly 22, the third connecting rod assembly 23, the lumbar support bracket 24 and other components are moved to adjust the sofa support structure 100 to the folded state or the unfolded state; , the first connecting rod assembly 21 only rotates correspondingly under the driving action of the transmission rod 30, which effectively simplifies the driving process of the first connecting rod assembly 21, and simplifies the sofa support structure 100, and has better stability .

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are more specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (10)

1. A sofa support structure (100), comprising a foot rod group (10), a lumbar support rod group (20), a transmission rod group and a seat cushion bracket (40), the foot rod group (10), the lumbar support Both the rod group (20) and the transmission rod group are arranged on the seat cushion bracket (40), and the lumbar support rod group (20) drives the lumbar support rod group (20) to be retracted and extended through the transmission rod group, It is characterized in that the transmission rod group is a transmission rod (30), one end of the transmission rod (30) is rotatably connected to the lumbar support rod group (20), and the other end of the transmission rod (30) is connected to the on the foot lever group (10). 2. The sofa support structure (100) according to claim 1, wherein the lumbar support rod group (20) comprises a first connecting rod assembly (21), a second connecting rod assembly (22), a third connecting rod assembly (22), a A connecting rod assembly (23) and a lumbar support bracket (24), the first connecting rod assembly (21) is connected to the transmission rod (30) and is connected to the seat cushion support (40); the second connecting rod assembly (21) is connected with the seat cushion support (40). The rod assembly (22) is connected to the seat cushion bracket (40) and to the lumbar support bracket (24); the third link assembly (23) is connected to the first link assembly (21) and is connected with the second connecting rod assembly (22). 3. The sofa support structure (100) according to claim 2, wherein the first link assembly (21) comprises: a second connecting rod (211), the first end of the second connecting rod (211) is connected to the transmission rod (30); A third connecting rod (212), the first end of the third connecting rod (212) is connected to the first end of the second connecting rod (211), and the second connecting rod (212) end connected to the seat cushion support (40); and A fourth connecting rod (213), the first end of the fourth connecting rod (213) is connected to the second end of the second connecting rod (211), and the second connecting rod (213) is The end is connected to the seat cushion bracket (40). 4. The sofa support structure (100) according to claim 2, wherein the foot lever group (10) comprises: a fifth connecting rod (11), the first end of the fifth connecting rod (11) is connected to the seat cushion bracket (40), and is connected to the transmission rod (30); a sixth connecting rod (12), the first end of the sixth connecting rod (12) is connected to the second end of the fifth connecting rod (11); a seventh connecting rod (13), the first end of the seventh connecting rod (13) is connected to the second end of the sixth connecting rod (12); an eighth connecting rod (14), the first end of the eighth connecting rod (14) is connected to the second end of the seventh connecting rod (13); A ninth connecting rod (15), the first end of the ninth connecting rod (15) is connected to the second end of the eighth connecting rod (14), the second end of the ninth connecting rod (15) is connected to the seat cushion bracket (40), and the ninth connecting rod (15) is fixedly connected to the external driving device through the first fixing member (16); a pedal bracket (17), the pedal bracket (17) is connected with the seventh connecting rod (13); and A tenth connecting rod (18), the first end of the tenth connecting rod (18) is connected to the first end of the eighth connecting rod (14), and the second end of the tenth connecting rod (18) Connected to the pedal bracket (17). 5. The sofa support structure (100) according to claim 3, wherein the second link assembly (22) comprises: an eleventh connecting rod (221), the first end of the eleventh connecting rod (221) is connected to the lumbar support bracket (24); A twelfth connecting rod (222), the first end of the twelfth connecting rod (222) is connected to the second end of the eleventh connecting rod (221); and A thirteenth connecting rod (223), the first end of the thirteenth connecting rod (223) is connected to the second end of the twelfth connecting rod (222), the thirteenth connecting rod (223) The second end of the thirteenth connecting rod (223) is connected to the seat cushion bracket (40), and the third end of the thirteenth connecting rod (223) is connected to the lumbar support bracket (24). 6. The sofa support structure (100) according to claim 5, wherein a limiting member (241) is provided on the lumbar support support (24), and the limiting member (241) is used to The eleventh connecting rod (221) is limited. 7. The sofa support structure (100) according to claim 5, wherein the third link assembly (23) comprises: A fourteenth connecting rod (231), the first end of the fourteenth connecting rod (231) is connected to the third end of the twelfth connecting rod (222); A fifteenth connecting rod (232), the first end of the fifteenth connecting rod (232) is connected to the second end of the fourteenth connecting rod (231); A sixteenth connecting rod (233), the first end of the sixteenth connecting rod (233) is connected to the second end of the fifteenth connecting rod (232); A seventeenth connecting rod (234), the first end of the seventeenth connecting rod (234) is connected to the second end of the sixteenth connecting rod (233); An eighteenth connecting rod (235), the first end of the eighteenth connecting rod (235) is connected to the second end of the seventeenth connecting rod (234); A nineteenth connecting rod (236), the first end of the nineteenth connecting rod (236) is connected to the second end of the eighteenth connecting rod (235), the nineteenth connecting rod (236) The second end of is connected to the fifteenth connecting rod (232); The twentieth connecting rod (237), the first end of the twentieth connecting rod (237) is connected to the eighteenth connecting rod (235), and the second end of the twentieth connecting rod (237) connected to the fifteenth connecting rod (232); and The twenty-first connecting rod (238), the first end of the twenty-first connecting rod (238) is connected to the twentieth connecting rod (237), and the The second end is connected to the seventeenth connecting rod (234). 8. The sofa support structure (100) according to claim 7, wherein the sofa support structure (100) further comprises a second fixing member (50), and the second fixing member (50) is mounted on the The fifteenth connecting rod (232) is connected, and the second fixing member (50) is fixedly connected with the external driving device. 9. The sofa support structure (100) according to claim 7, wherein the first link assembly (21) further comprises a twenty-second connecting rod (214), the twenty-second connecting rod The first end of (214) is connected to the second connecting rod (211), and the second end of the twenty-second connecting rod (214) is connected to the sixteenth connecting rod (233). 10. A sofa, characterized by comprising the sofa support structure (100) according to any one of claims 1-9.

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