An electric sofa iron frame assembly

Abstract

The present application relates to electric sofa technical field, especially a kind of electric sofa iron frame assembly, it includes underframe and the seat support module located above underframe, the front, rear ends of seat support module are respectively connected extension module and backrest module;Backrest module is set on the underframe by first support piece, the front end of the extension module is connected foot rest module, the front, rear ends of drive assembly are respectively connected extension module and rotary module, the upper, lower ends of rotary module are respectively connected with backrest module and underframe, drive assembly drives sofa iron frame assembly to adjust between the position of sitting posture, stretching posture and lying posture.The present application simplifies existing electric sofa iron frame assembly, uses the configuration of quick-mounting single motor, simplifies motor installation step, overall mechanism runs stably, makes sofa easily realize the arbitrary switching of zero gravity state and conventional state, greatly increases the comfort of user.

Description

Technical Field

[0001] This invention relates to the field of electric sofa technology, and in particular to an electric sofa frame assembly. Background Technology

[0002] Zero-gravity research is a hot topic in sofa frame components. Most existing sofa frame designs utilize dual motors to achieve zero-gravity functionality. For example, patent CN212754952U discloses a sofa frame with a zero-gravity reclining function, and patent CN215913886U discloses a dual-motor, separately controlled, high-load-bearing zero-gravity reclining chair frame for the elderly. Both require two electric actuators to achieve the zero-gravity reclining state.

[0003] Sofa frames that achieve zero-gravity functionality with a single motor often have complex structures, numerous parts, and high mold and manufacturing costs. Furthermore, due to the weight of the sofa frame, transportation costs are high, making it difficult to achieve a price advantage in sales. In actual use, the large number of parts in the sofa frame can easily cause interference that affects the user experience. For example, when the frame is opened, the backrest extends forward and forms an angle, which can easily cause clothes to be pulled up or caught. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to solve the problem of complex structure of single motor zero gravity sofa frame in the prior art, and to provide a simple electric sofa frame assembly.

[0005] The technical solution adopted by the present invention to solve its technical problem is: an electric sofa frame assembly, comprising: a base frame and a seat support module located above the base frame, wherein the front and rear ends of the seat support module are respectively connected to an extension module and a backrest module; the backrest module is mounted on the base frame via a first support member; the front end of the extension module is connected to a footrest module; the front and rear ends of a drive assembly are respectively connected to the extension module and a rotation module; the upper and lower ends of the rotation module are respectively connected to the backrest module and the base frame; and the drive assembly drives the sofa frame assembly to adjust between sitting, extended, and reclining positions.

[0006] Furthermore, the backrest module includes a backrest component, a fifth link, and a sixth link. The backrest component has a "V" shaped structure, with its front end riveted to the rotating module and its apex riveted to the upper end of the fifth link. The fifth link has a triangular structure, with its front end riveted to the upper end of the first support component. The sixth link has a sliding groove, and the lower end of the fifth link has a pin passing through the sliding groove. The front end of the sixth link is riveted to the middle of the backrest component.

[0007] Furthermore, the seat support module includes a second support member and a seventh link. The rear end of the second support member is movably connected to a pin passing through a slide groove, and the front end of the second support member is riveted to the extension module. The seventh link is located above the second support member, and the rear end of the seventh link is riveted to the middle position of the outer wall of the backrest member. The front end of the seventh link is riveted to the extension module.

[0008] Furthermore, the rotating module includes a first link, a second link, a third link, and a fourth link. The rear end of the first link is connected to the backrest module, the front end of the first link is riveted to the upper end of the fourth link, and the lower end of the fourth link is riveted to the base frame. The second link has a "V" shaped structure, with its apex riveted to the first link near the rear end. The rear end of the second link is connected to the drive assembly, the front end of the second link is connected to the rear end of the third link, and the front end of the third link is riveted to the middle position of the fourth link.

[0009] Furthermore, the extension module includes an eighth link, a ninth link, a tenth link, and an eleventh link. The eighth link has an L-shaped structure, and its upper end is riveted to the outer wall of the seventh link in the seat support module near the front end. The rear end of the eighth link is riveted to the front end of the second support member in the seat support module, and the front end of the eighth link is riveted to the rear end of the ninth link. The tenth link is located inside the ninth link and is spatially distributed. The rear end of the tenth link is riveted to the front end of the seventh link, and the front end of the tenth link is riveted to the rear end of the eleventh link. The front end of the eleventh link and the front end of the ninth link are both riveted to the foot rest module.

[0010] Furthermore, a third limiting member is protruding from the outer side wall near the front end of the tenth link, and a third limiting groove is provided on the top edge near the rear end of the ninth link. When the third limiting member is engaged in the third limiting groove, the extension module is in the extended state.

[0011] Furthermore, the backrest module is connected to the base frame via a first support member. The backrest module includes a backrest component, a twelfth link, a thirteenth link, and a fourteenth link. The backrest component has a "V" shaped structure, and its front end is riveted to the rotating module. The upper end of the first support member is riveted to the lower end near the backrest component. The rear end of the twelfth link is riveted to the upper part of the first support member. The upper end of the thirteenth link is riveted to the middle between the front end and the apex of the backrest component. The lower part of the thirteenth link has a second sliding groove. The front end of the twelfth link has a pin that passes through the second sliding groove. The upper end of the fourteenth link is riveted to the middle of the twelfth link, and the lower end of the fourteenth link is riveted to the base frame.

[0012] Furthermore, the rotating module includes a first link, a second link, a third link, and a fourth link. The rear end of the first link is connected to the backrest module, the front end of the first link is riveted to the upper end of the fourth link, and the lower end of the fourth link is riveted to the base frame. The second link has an inverted "V" shape, with its apex riveted to the first link near the rear end. The rear end of the second link is connected to the drive assembly, the front end of the second link is connected to the upper end of the third link, and the lower end of the third link is riveted to the base frame.

[0013] Furthermore, the front end of the base frame is provided with a limiting member from front to back. When the entire sofa frame changes from a retracted state to an extended state, the two limiting members support the third link and the fourth link respectively.

[0014] Furthermore, the seventh link of the seat support module has a first limiting member protruding from the lower part of the inner wall near the rear end, and a second limiting member protruding from the lower part of the inner wall near the middle of the seventh link. The first link has a first limiting groove on its bottom edge near the rear end, and a second limiting groove on its top edge near the rear end. When the first limiting member is engaged in the first limiting groove and when the second limiting member is engaged in the second limiting groove, the entire sofa frame is in a retracted state.

[0015] Furthermore, a first limiting groove is provided on the bottom edge of the first connecting rod near the rear end, and a second limiting groove is provided on the top edge of the first connecting rod near the rear end; a fourth limiting member is provided protruding near the front end of the second connecting rod, and a fourth limiting groove is provided at the rear end of the third connecting rod. When the fourth limiting member is engaged in the fourth limiting groove, the entire sofa frame is in an extended state.

[0016] Furthermore, a fifth limiting member is provided on the lower inner side of the first support member, and a fifth limiting groove is provided at the rear end of the base frame. When the fifth limiting member is engaged in the fifth limiting groove, the entire sofa frame is in a retracted state. A sixth limiting groove is provided on the upper rear edge of the first support member, and a sixth limiting member is provided at the lower inner end of the backrest member. When the sixth limiting member is engaged in the sixth limiting groove, the entire sofa frame is in an extended state.

[0017] Furthermore, a reinforcing rod is connected to the inner wall of the first support member.

[0018] Furthermore, the drive assembly includes a front drive tube, a driver, and a rear drive tube, with the driver connected at the midpoint between the front and rear drive tubes. The front drive tube is connected to the extension module, and the rear drive tube is connected to the rotation module.

[0019] Furthermore, the driver includes a motor, a guide rail, a connector, and a slider. The connector is connected to the front drive tube, the slider is mounted on the guide rail, and the slider is connected to the rear drive tube.

[0020] Furthermore, the base frame is formed by connecting a first round tube, a first angle iron, a second round tube, and a second angle iron end to end.

[0021] The beneficial effects of this invention are: it simplifies the existing metal-based sofa frame mechanism, uses a quick-install single motor configuration, simplifies motor installation steps, ensures stable overall operation, and allows the sofa to easily switch between zero-gravity and normal states, greatly increasing user comfort; it has a simple structure, comprehensive functions, strong versatility, and stable and reliable operation; it is very convenient for users to assemble and install, and is shipped in bulk, greatly saving transportation costs, making the product more advantageous. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure from another direction.

[0025] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present invention in a seated position.

[0026] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention in the TV posture state.

[0027] Figure 5 This is a schematic diagram of the structure of Embodiment 1 of the present invention in a lying position.

[0028] Figure 6 This is a comparative diagram of the TV posture state and the fully open lying posture state in Embodiment 1 of the present invention.

[0029] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0030] Figure 8 yes Figure 7 A schematic diagram of the structure from another direction.

[0031] Figure 9 This is a schematic diagram of the structure of Embodiment 2 of the present invention in a seated position.

[0032] Figure 10 This is a schematic diagram of the structure of Embodiment 2 of the present invention in the TV posture state.

[0033] Figure 11 This is a schematic diagram of the structure of Embodiment 2 of the present invention in a lying position.

[0034] In the picture:

[0035] 1. Base frame; 11. First round tube; 12. First angle iron; 13. Second round tube; 14. Second angle iron; 15. Support leg; 16. Fifth limiting groove; 17. Seventh limiting component.

[0036] 2. Backrest module, 21. Backrest component, 211. Sixth limiting component, 22. Fifth link, 23. Sixth link, 231. Slide groove, 24. Twelfth link, 25. Thirteenth link, 251. Slide groove two, 26. Fourteenth link,

[0037] 3. Foot rest module,

[0038] 4. Drive assembly, 41. Front drive tube, 42. Driver, 421. Motor, 422. Guide rail, 423. Connector, 424. Slider, 43. Rear drive tube,

[0039] 5. Seat support module; 51. Second support member; 52. Seventh link; 521. First limiting member; 522. Second limiting member.

[0040] 6. Extension module, 61. Eighth link, 62. Ninth link, 621. Third limiting groove, 63. Tenth link, 631. Third limiting component, 64. Eleventh link,

[0041] 7. Rotating module; 71. First connecting rod; 711. First limiting groove; 712. Second limiting groove; 72. Second connecting rod; 721. Fourth limiting member; 73. Third connecting rod; 731. Fourth limiting groove; 74. Fourth connecting rod; 8. First support member; 81. Fifth limiting member; 82. Sixth limiting groove; 9. Reinforcing rod. Detailed Implementation

[0042] The present invention will now be further described in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0043] Example 1

[0044] like Figure 1 and Figure 2As shown, an electric sofa frame assembly includes a base frame 1, a backrest module 2, a footrest module 3, a drive assembly 4, a seat support module 5, an extension module 6, and a rotation module 7. The seat support module 5 is located above the base frame 1, and its front and rear ends are respectively connected to the extension module 6 and the backrest module 2. The backrest module 2 is mounted on the base frame 1 via a first support member 8. The front end of the extension module 6 is connected to the footrest module 3. The drive assembly 4 includes a front drive tube 41, a driver 42, and a rear drive tube 43. The driver 42 is connected in the middle of the front drive tube 41 and the rear drive tube 43. The front drive tube 41 is connected to the extension module 6, and the rear drive tube 43 is connected to the rotation module 7. The rear end of the rotation module 7 is connected to the backrest module 2, and its lower end is connected to the base frame 1.

[0045] The base frame 1 is formed by connecting the first round tube 11, the first angle iron 12, the second round tube 13, and the second angle iron 14 end to end. The base frame 1 is provided with support feet 15 at the four corners. The base frames 1 in the prior art are basically composed of angle irons such as the first angle iron 12 and the second angle iron 14, because the motor needs to be installed on the angle irons, which are relatively heavy and costly.

[0046] The driver 42 includes a motor 421, a guide rail 422, a connector 423, and a slider 424. The connector 423 is located at the end of the driver 42 near the motor 421 and is connected to the front drive tube 41. The slider 424 is mounted on the guide rail 422 and is connected to the rear drive tube 43.

[0047] The rotating module 7 includes a first link 71, a second link 72, a third link 73, and a fourth link 74. The rear end of the first link 71 is connected to the backrest module 2, the front end of the first link 71 is riveted to the upper end of the fourth link 74, and the lower end of the fourth link 74 is riveted to the base frame 1. The second link 72 has a "V" shaped structure, including a apex and two ends, front and rear. The apex is riveted to the first link 71 near the rear end, the rear end of the second link 72 is connected to the end of the rear drive tube 43, the front end of the second link 72 is connected to the rear end of the third link 73, and the front end of the third link 73 is riveted to the middle position of the fourth link 74. A first limiting groove 711 is formed on the bottom edge of the first link 71 near the rear end, and a second limiting groove 712 is formed on the top edge of the first link 71 near the rear end.

[0048] The backrest module 2 is connected to the base frame 1 through the first support member 8. The backrest module 2 includes a backrest member 21, a fifth link 22 and a sixth link 23. The backrest member 21 has a "V" shaped structure and includes a apex and two ends, front and rear. Its front end is riveted to the rear end of the first link 71, its apex is riveted to the upper end of the fifth link 22, and the sixth link 23 is riveted to the middle between its front end and the apex. The fifth link 22 has a triangular structure. The front end of the fifth link 22 is riveted to the upper end of the first support member 8. The sixth link 23 has a groove 231. The lower end of the fifth link 22 is riveted to the seat support module 5 through a pin passing through the groove 231. A reinforcing rod 9 is connected to the inner wall of the first support member 8.

[0049] The seat support module 5 includes a second support member 51 and a seventh link 52. The front end of the second support member 51 is riveted to the extension module 6, and the rear end of the second support member 51 is movably connected to a pin passing through the slide groove 231, i.e., riveted to the lower end of the fifth link 22. The seventh link 52 is positioned above the second support member 51, with its front end riveted to the extension module 6 and its rear end riveted to the middle of the outer wall of the backrest member 21. A first limiting member 521 protrudes from the lower part of the inner wall near the rear end of the seventh link 52, and a second limiting member 522 protrudes from the lower part of the inner wall near the middle of the seventh link 52. When the first limiting member 521 is engaged in the first limiting groove 711 and the second limiting member 522 is engaged in the second limiting groove 712, the entire sofa frame is in a retracted state. Figure 3 As shown.

[0050] The extension module 6 includes an eighth link 61, a ninth link 62, a tenth link 63, and an eleventh link 64. The eighth link 61 has an L-shaped structure, and its upper end is riveted to the outer side wall of the seventh link 52 near the front end. The rear end of the eighth link 61 is riveted to the front end of the second support member 51, and the front end of the eighth link 61 is riveted to the rear end of the ninth link 62. The tenth link 63 is located inside the ninth link 62 and is spatially distributed. The rear end of the tenth link 63 is riveted to the front end of the seventh link 52, and the front end of the tenth link 63 is riveted to the rear end of the eleventh link 64. The front end of the eleventh link 64 and the front end of the ninth link 62 are both riveted to the foot rest module 3. A third limiting member 631 protrudes from the outer side wall near the front end of the tenth link 63, and a third limiting groove 621 is formed on the top edge near the rear end of the ninth link 62. When the third limiting member 631 is engaged with the third limiting groove 621, the extension module 6 is in the extended state. Figure 1 and Figures 4-6 As shown.

[0051] Movement method: The motor 421 pushes the front drive tube 41, which drives the extension module 6 forward to open the footrest module 3. The motor 421 then pushes the rear drive tube 43 backward, which drives the rotation module 7 to rotate and lift upward. The slide groove 231 on the sixth link 23 limits the rotation module 7 to a specified height, achieving the function of lifting with zero gravity. Multiple limiting structures: first limiting member 521 and first limiting groove 711, second limiting member 522 and second limiting groove 712, third limiting member 631 and third limiting groove 621, with a simple structure. The motor-driven mode allows you to stay in any comfortable position. The overall function is stable, and the experience is more comfortable and intelligent.

[0052] Specific working principle: When the iron frame is opened, motor 421 pushes the front drive tube 41, driving the extension module 6 forward to open the footrest module 3. Motor 421 then pushes the rear drive tube 43 backward, causing the rotation module 7 to rotate and lift upward. The slide groove 231 on the sixth link 23 limits the movement, allowing the entire mechanism to reach the designated lifting height, thereby achieving a zero-gravity posture. Figure 6 As shown, in the TV posture state (represented by solid lines in the figure) and the fully open reclining posture state (represented by dotted lines in the figure), the entire sofa frame is raised by 20 cm and the backrest is tilted back 29°. It is fixed by the sliding groove 231, easily achieving a zero-gravity state.

[0053] Example 2

[0054] The difference from Example 1 is as follows: Figure 7 and Figure 8 As shown, the rotating module 7 includes a first link 71, a second link 72, a third link 73, and a fourth link 74. The rear end of the first link 71 is connected to the backrest module 2, the front end of the first link 71 is riveted to the upper end of the fourth link 74, and the lower end of the fourth link 74 is riveted to the base frame 1. The second link 72 has an inverted "V" shaped structure, including a vertex and two ends, front and rear. The vertex is riveted to the first link 71 near the rear end. The rear end of the second link 72 is connected to the rear drive tube 43. The front end of the second link 72 is connected to the upper end of the third link 73, and the lower end of the third link 73 is riveted to the base frame 1. To avoid interference during operation, the third link 73 and the fourth link 74 are respectively hinged to both sides of the same angle iron of the base frame 1. A first limiting groove 711 is formed on the bottom edge near the rear end of the first connecting rod 71, and a second limiting groove 712 is formed on the top edge near the rear end of the first connecting rod 71; a fourth limiting member 721 protrudes from the front end near the second connecting rod 72, and a fourth limiting groove 731 is formed at the upper end of the third connecting rod 73. When the fourth limiting member 721 is engaged with the fourth limiting groove 731, the entire sofa frame is in an extended state, such as... Figures 10-11 As shown.

[0055] The backrest module 2 is connected to the base frame 1 via the first support member 8. The backrest module 2 includes a backrest member 21, a twelfth link 24, a thirteenth link 25, and a fourteenth link 26. The backrest member 21 has a "V" shaped structure, and its front end is riveted to the rear end of the first link 71. The upper end of the first support member 8 is riveted to the lower end near the backrest member 21. The rear end of the twelfth link 24 is riveted to the upper part of the first support member 8. The upper end of the thirteenth link 25 is riveted to the middle part between the front end and the top of the backrest member 21. The thirteenth link 25 is provided with a second sliding groove 251. The front end of the twelfth link 24 is provided with a pin that passes through the second sliding groove 251. During posture adjustment, the front end of the twelfth link 24 can move within the second sliding groove 251. The upper end of the fourteenth link 26 is riveted to the middle of the twelfth link 24, and the lower end of the fourteenth link 26 is riveted to the base frame 1.

[0056] A fifth limiting member 81 is provided on the lower inner side of the first support member 8, and a fifth limiting groove 16 is provided at the rear end of the base frame 1. When the fifth limiting member 81 is engaged with the fifth limiting groove 16, the entire sofa frame is in a TV position. Figure 10 As shown; a sixth limiting groove 82 is provided on the upper rear edge of the first support member 8, and a sixth limiting member 211 is provided at the lower inner end of the backrest member 21. When the sixth limiting member 211 is engaged with the sixth limiting groove 82, the entire sofa frame is in a reclining position, as shown. Figure 11 As shown.

[0057] In the extension module 6, the tenth link 63 is located outside the ninth link 62 and the eighth link 61 (while in Embodiment 1, the eighth link 61 and the ninth link 62 are located outside the tenth link 63). The tenth link 63 has an L-shaped structure, and the eighth link 61 is a straight rod. Correspondingly, a third limiting member 631 protrudes from the inner sidewall near the front end of the tenth link 63, and a third limiting groove 621 is formed on the top edge near the rear end of the ninth link 62. When the third limiting member 631 is engaged with the third limiting groove 621, the extension module 6 is in the extended state. Figures 10-11 As shown.

[0058] In addition, a seventh limiting member 17 is arranged sequentially from front to back at the front end of the base frame 1. When the entire sofa frame changes from a retracted state to an extended state, the two seventh limiting members 17 respectively support the third link 73 and the fourth link 74. To facilitate the smooth operation of the entire frame, a spring is connected between the front drive tube 41 and the fourth link 74.

[0059] Compared to Embodiment 1, in Embodiment 2, the lower ends of the third link 73 and the fourth link 74 in the rotating module 7 are both riveted to the base frame 1. At the same time, the structure of the backrest module 2 is changed, and the lower end of the fourteenth link 26 is riveted to the base frame 1. That is, both the rotating module 7 and the backrest module 2 have two links riveted to the base frame 1. The advantage of doing so is that it can further increase the load-bearing capacity of the entire iron frame. In order to ensure the stability of operation and increase comfort, multiple limiting structures are also set for the improvements of these two components: the fourth limiting member 721 and the fourth limiting groove 731, the fifth limiting member 81 and the fifth limiting groove 16, and the sixth limiting member 211 and the sixth limiting groove 82. The improved structure of the extension module 6 can realize the simultaneous forward and upward flipping of the large and small footrests, so only one mounting plate needs to be installed. However, in Embodiment 1, the large and small footrests of the extension module 6 flip upward separately, so each of the large and small footrests needs to be connected to a mounting plate.

[0060] The specific working principle is as follows: When the iron frame is opened, the motor 421 pushes the front drive tube 41, which drives the extension module 6 forward to open the footrest module 3. The motor 421 pushes the rear drive tube 43 backward, which drives the rotation module 7 to rotate and rotate upward. The slide groove 251 on the thirteenth link 25 is limited, so that the whole mechanism reaches the specified lifting height, thereby achieving a zero-gravity posture.

[0061] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An electrically powered sofa frame assembly, characterized by, The utility model relates to a sofa iron frame assembly, which comprises a base frame (1) and a seat support module (5) located above the base frame (1), the front and rear ends of the seat support module (5) are connected with an extension module (6) and a backrest module (2) respectively, the backrest module (2) is arranged on the base frame (1) through a first support (8), the front end of the extension module (6) is connected with a footrest module (3), the front and rear ends of a driving assembly (4) are connected with the extension module (6) and a rotating module (7) respectively, the upper and lower ends of the rotating module (7) are connected with the backrest module (2) and the base frame (1) respectively, the driving assembly (4) drives the sofa iron frame assembly to adjust among the positions of a sitting posture, an extension posture and a lying posture, the rotating module (7) comprises a first connecting rod (71), a second connecting rod (72), a third connecting rod (73) and a fourth connecting rod (74), the rear end of the first connecting rod (71) is connected with the backrest module (2), the front end of the first connecting rod (71) is riveted to the upper end of the fourth connecting rod (74), the lower end of the fourth connecting rod (74) is riveted to the base frame (1), the second connecting rod (72) is in a V-shaped structure, the top point of the second connecting rod (72) is riveted to the first connecting rod (71) near the rear end, the rear end of the second connecting rod (72) is connected with the driving assembly (4), the front end of the second connecting rod (72) is connected with the rear end of the third connecting rod (73), and the front end of the third connecting rod (73) is riveted to the middle position of the fourth connecting rod (74). The backrest module (2) comprises a backrest piece (21), a fifth connecting rod (22) and a sixth connecting rod (23), the backrest piece (21) is in a V-shaped structure, the front end of the backrest piece (21) is riveted to the rotating module (7), and the top point of the backrest piece (21) is riveted to the upper end of the fifth connecting rod (22), the fifth connecting rod (22) is in a triangular structure, the front end of the fifth connecting rod (22) is riveted to the upper end of the first support (8), the sixth connecting rod (23) is provided with a sliding groove (231), the lower end of the fifth connecting rod (22) is provided with a pin shaft penetrating through the sliding groove (231), and the front end of the sixth connecting rod (23) is riveted to the middle part of the backrest piece (21).

2. An electrically powered sofa frame assembly according to claim 1, wherein: The seat support module (5) comprises a second support (51) and a seventh connecting rod (52), the rear end of the second support (51) is movably connected to the pin shaft penetrating through the sliding groove (231), the front end of the second support (51) is riveted to the extension module (6), the seventh connecting rod (52) is arranged above the second support (51), the rear end of the seventh connecting rod (52) is riveted to the middle position of the outer side wall of the backrest piece (21), and the front end of the seventh connecting rod (52) is riveted to the extension module (6).

3. An electrically powered sofa frame assembly according to claim 2, wherein: ​ 4. The motorized sofa frame assembly of claim 1, wherein: The stretching module (6) comprises an eighth connecting rod (61), a ninth connecting rod (62), a tenth connecting rod (63) and an eleventh connecting rod (64), the eighth connecting rod (61) is in L-shaped structure, the upper end of which is riveted to the outer side wall of the seventh connecting rod (52) of the seat support module (5) near the front end, the rear end of the eighth connecting rod (61) is riveted to the front end of the second support (51) of the seat support module (5), the front end of the eighth connecting rod (61) is riveted to the rear end of the ninth connecting rod (62), the tenth connecting rod (63) is arranged inside the ninth connecting rod (62) and is in spatially intersecting distribution, the rear end of the tenth connecting rod (63) is riveted to the front end of the seventh connecting rod (52), the front end of the tenth connecting rod (63) is riveted to the rear end of the eleventh connecting rod (64), and the front end of the eleventh connecting rod (64) is riveted to the front end of the ninth connecting rod (62).

5. An electrically powered sofa frame assembly according to claim 4, wherein: The outer side wall of the tenth connecting rod (63) near the front end is provided with a third limiting piece (631), the top edge of the ninth connecting rod (62) near the rear end is provided with a third limiting groove (621), and when the third limiting piece (631) is clamped into the third limiting groove (621), the stretching module (6) is in the stretched state.

6. An electrically powered sofa frame assembly according to claim 1, wherein: The inner side wall of the first support (8) is connected with a reinforcing rod (9).

7. An electrically powered sofa frame assembly according to claim 1, wherein: The driving assembly comprises a front driving pipe (41), a driver (42) and a rear driving pipe (43), the driver (42) is connected at the middle position of the front driving pipe (41) and the rear driving pipe (43), the front driving pipe (41) is connected with the stretching module (6), and the rear driving pipe (43) is connected with the rotating module (7).

8. An electrically powered sofa frame assembly according to claim 7, wherein: The driver (42) comprises a motor (421), a guide rail (422), a connecting piece (423) and a sliding block (424), the connecting piece (423) is connected with the front driving pipe (41), the sliding block (424) is installed on the guide rail (422), and the sliding block (424) is connected with the rear driving pipe (43).

9. An electrically powered sofa frame assembly according to claim 1, wherein: The chassis (1) is formed by first circular pipes (11), first angle irons (12), second circular pipes (13) and second angle irons (14) connected end to end.

10. An electrically powered sofa frame assembly characterized by, Comprise: The bottom frame (1) and the seat support module (5) located above the bottom frame (1), the front and rear ends of the seat support module (5) are connected with the stretching module (6) and the backrest module (2) respectively; the backrest module (2) is arranged on the bottom frame (1) through the first support (8), the front end of the stretching module (6) is connected with the footrest module (3), the front and rear ends of the driving assembly (4) are connected with the stretching module (6) and the rotating module (7) respectively, the upper and lower ends of the rotating module (7) are connected with the backrest module (2) and the bottom frame (1) respectively, and the driving assembly (4) drives the sofa iron frame assembly to adjust between the positions of the sitting posture, the stretching posture and the lying posture; the rotating module (7) comprises a first connecting rod (71), a second connecting rod (72), a third connecting rod (73) and a fourth connecting rod (74), the rear end of the first connecting rod (71) is connected with the backrest module (2), the front end of the first connecting rod (71) is riveted to the upper end of the fourth connecting rod (74), the lower end of the fourth connecting rod (74) is riveted to the bottom frame (1), the second connecting rod (72) is in an inverted "V" shape structure, the top point part of the second connecting rod (72) is riveted to the first connecting rod (71) close to the rear end, the rear end of the second connecting rod (72) is connected with the end of the driving assembly (4), the front end of the second connecting rod (72) is connected with the upper end of the third connecting rod (73), and the lower end of the third connecting rod (73) is riveted to the bottom frame (1).

11. An electrically powered sofa frame assembly according to claim 10, wherein: The backrest module (2) is connected with the bottom frame (1) through the first support (8), and the backrest module (2) comprises a backrest piece (21), a twelfth connecting rod (24), a thirteenth connecting rod (25) and a fourteenth connecting rod (26), the backrest piece (21) is in a "V" shape structure, the front end of the backrest piece (21) is riveted to the rotating module (7), the upper end of the first support (8) is riveted to the lower end of the backrest piece (21) close to the backrest piece (21), the rear end of the twelfth connecting rod (24) is riveted to the upper part of the first support (8), the upper end of the thirteenth connecting rod (25) is riveted to the middle part between the front end and the top point part of the backrest piece (21), the lower part of the thirteenth connecting rod (25) is provided with a second sliding groove (251), the front end of the twelfth connecting rod (24) is provided with a pin shaft penetrating through the second sliding groove (251), and the upper end of the fourteenth connecting rod (26) is riveted to the middle part of the twelfth connecting rod (24), and the lower end of the fourteenth connecting rod (26) is riveted to the bottom frame (1).

12. An electrically powered sofa frame assembly according to claim 10, wherein: The front end of the bottom frame (1) is sequentially provided with a limiting piece (17) from front to back, when the sofa iron frame changes from the contraction state to the stretching state, the two limiting pieces (17) support the third connecting rod (73) and the fourth connecting rod (74) respectively.

13. An electrically powered sofa frame assembly according to claim 10, wherein: The seventh connecting rod (52) of the seat support module (5) is provided with a first limiting piece (521) protruding from the lower part of the inner side wall near the rear end, and the seventh connecting rod (52) is provided with a second limiting piece (522) protruding from the lower part of the inner side wall near the middle, the first connecting rod (71) is provided with a first limiting groove (711) on the bottom edge near the rear end, and the first connecting rod (71) is provided with a second limiting groove (712) on the top edge near the rear end; when the first limiting piece (521) is clamped into the first limiting groove (711) and the second limiting piece (522) is clamped into the second limiting groove (712), the sofa iron frame is in a contracted state.

14. The motorized sofa frame assembly of claim 10, wherein: The first connecting rod (71) is provided with a first limiting groove (711) on the bottom edge near the rear end, and the first connecting rod (71) is provided with a second limiting groove (712) on the top edge near the rear end; a fourth limiting piece (721) is protruding from the front end of the second connecting rod (72), and the rear end of the third connecting rod (73) is provided with a fourth limiting groove (731); when the fourth limiting piece (721) is clamped into the fourth limiting groove (731), the sofa iron frame is in an extended state.

15. An electrically powered sofa frame assembly according to claim 11, wherein: The lower inner side of the first support piece (8) is provided with a fifth limiting piece (81), and the rear end of the bottom frame (1) is provided with a fifth limiting groove (16); when the fifth limiting piece (81) is clamped into the fifth limiting groove (16), the sofa iron frame is in a contracted state; the upper rear side edge of the first support piece (8) is provided with a sixth limiting groove (82), and the inner lower end of the backrest piece (21) of the backrest module (2) is provided with a sixth limiting piece (211); when the sixth limiting piece (211) is clamped into the sixth limiting groove (82), the sofa iron frame is in an extended state.

16. An electrically powered sofa frame assembly according to claim 10, wherein: The inner side wall of the first support piece (8) is connected with a reinforcing rod (9).

17. An electrically powered sofa frame assembly according to claim 10, wherein: The driving assembly comprises a front driving pipe (41), a driver (42) and a rear driving pipe (43), the driver (42) is connected at the middle position of the front driving pipe (41) and the rear driving pipe (43), the front driving pipe (41) is connected with the extension module (6), and the rear driving pipe (43) is connected with the rotation module (7).

18. An electrically powered sofa frame assembly according to claim 17, wherein: The driver (42) comprises a motor (421), a guide rail (422), a connecting piece (423) and a sliding block (424), the connecting piece (423) is connected with the front driving pipe (41), the sliding block (424) is installed on the guide rail (422), and the sliding block (424) is connected with the rear driving pipe (43).

19. An electrically powered sofa frame assembly according to claim 10, wherein: The bottom frame (1) is formed by first circular pipes (11), first angle irons (12), second circular pipes (13) and second angle irons (14) connected end to end.

Images