Three-posture sofa iron stand with four-way leg supports

Abstract

The utility model discloses a three-posture sofa iron stand with four-direction leg supports. The three-posture sofa iron stand comprises a supporting frame assembly, the swing seat assembly is assembled above the support frame assembly; the backrest assembly is in transmission connection with the rear end of the swing seat assembly and the rear end of the supporting frame assembly; and the four-way leg support assembly is assembled at the front end of the swing seat assembly and comprises a first leg support mechanism and a leg support motor. The swing seat assembly can swing back and forth relative to the supporting frame assembly, and the backrest assembly is in transmission connection with the swing seat assembly and the rear end of the supporting frame assembly. When the swing seat assembly swings, the backrest assembly can be driven to independently rotate, meanwhile, the four-direction leg support assembly can be independently controlled by a leg support motor to move front and back and achieve the lifting effect, the overall structure is simple, the number of motors is reduced, and therefore the problems that cost is high and occupied space is large are solved.

Description

Technical Field

[0001] This utility model relates to the field of sofa frame technology, and in particular to a three-position sofa frame with four-way leg rests. Background Technology

[0002] In modern home life, sofas, as important pieces of furniture for rest and entertainment, are increasingly valued by consumers for their comfort and functionality. Traditional three-position sofas typically include sitting, TV, and reclining positions. These posture transitions rely on a linkage mechanism within the sofa frame, which controls the backrest and leg support components in tandem to achieve the change in seating posture. While this design simplifies operation to some extent, it also introduces significant problems: it limits the individual control of the leg and backrest components, preventing users from independently adjusting the angle of their legs or backrest as needed, thus reducing the sofa's flexibility and comfort.

[0003] To address this issue, a structure with four-way leg rests has emerged in existing technology. This structure allows users to independently control the raising and lowering of the leg rests, while the backrest assembly remains relatively independent, thus achieving greater flexibility and personalized adjustments. However, this four-way leg rest design is typically accompanied by a complex structure and higher manufacturing costs. Specifically, to achieve four-way adjustment of the leg rests, traditional designs often require two motors to control the forward / backward and lifting movements of the leg rests separately. This not only increases the space occupied by the sofa frame but also raises the complexity of the product and manufacturing costs. Utility Model Content

[0004] To overcome at least one of the defects described in the prior art, this utility model provides a three-position sofa frame with a four-way leg rest. This solves the problems of complex design, high cost, and large space occupation of existing three-position sofa seats and four-way leg rests.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A three-position sofa frame with four-way leg rests includes: a support frame assembly; a swing seat assembly mounted above the support frame assembly to allow the swing seat assembly to swing back and forth relative to the support frame assembly; a backrest assembly connected to the rear end of the swing seat assembly and the rear end of the support frame assembly, respectively, to enable the backrest assembly to rotate when the swing seat assembly swings relative to the support frame assembly; and a four-way leg rest assembly mounted at the front end of the swing seat assembly, the four-way leg rest assembly including a first leg rest mechanism and a leg rest motor, the leg rest motor controlling the first leg rest mechanism to flip and lift or flip and reset relative to the swing seat assembly.

[0007] By adopting the above solution, the swing seat assembly can swing back and forth relative to the support frame assembly, and the backrest assembly is connected to the rear end of both the swing seat assembly and the support frame assembly via a transmission connection. When the swing seat assembly swings, it can drive the backrest assembly to rotate independently. At the same time, the four-way leg support assembly can be individually controlled by the leg support motor to move back and forth and lift. The overall structure is relatively simple, reducing the number of motors and thus solving the problems of high cost and large space occupation.

[0008] Furthermore, the four-way leg support assembly also includes: a motor base, which is assembled with the leg support motor; a second leg support mechanism, which is provided with a telescopic mechanism between the second leg support mechanism and the first leg support mechanism, so that the second leg support mechanism can extend or retract relative to the first leg support mechanism; and a linkage component, which is rotatably connected between the leg support motor and the first leg support mechanism.

[0009] By adopting the above solution, the leg rest can be independently flipped and raised, flipped and reset, and extended or retracted and overlapped, greatly improving the flexibility and adaptability of the sofa.

[0010] Furthermore, the support frame assembly includes a first support sidewall and a second support sidewall, a first support rod is connected between the rear end of the first support sidewall and the rear end of the second support sidewall, and a second support rod is connected between the front end of the first support sidewall and the front end of the second support sidewall.

[0011] By adopting the above solution, the support frame assembly, as the basic structure of the sofa frame, provides stable support and connection for other components.

[0012] Furthermore, the swing seat assembly includes a first swing member and a second swing member, with a first crossbar and a second crossbar connecting the first swing member and the second swing member, the first crossbar being closer to the first support rod than the second crossbar.

[0013] By adopting the above solution, through the ingenious combination of the first rocker component, the second rocker component, the first crossbar, and the second crossbar, the rocker seat assembly not only provides stable support and connection functions, but also realizes the back-and-forth rocking of the sofa seat and the tilt adjustment of the backrest.

[0014] Furthermore, it also includes a drive motor, which includes a fixed part and a movable part. The fixed part is rotatably connected to the first support rod, and the movable part is rotatably connected to the first crossbar.

[0015] By adopting the above solution, the introduction of the drive motor provides a power source for the three-position sofa frame with four-way leg rests, enabling the sofa seat to achieve various posture adjustments.

[0016] Furthermore, a backrest rotation support arm is provided between the swing seat assembly and the backrest assembly. The backrest rotation support arm is fixed to the swing seat assembly and rotatably connected to the backrest assembly. A backrest transmission linkage group is rotatably connected between the support frame assembly and the backrest assembly.

[0017] By adopting the above solution, the backrest rotation support arm can provide stable support for the rotation of the backrest assembly, act as a pivot, and realize the tilt adjustment of the backrest assembly.

[0018] Furthermore, a lifting linkage group is connected between the front end of the swing seat assembly and the front end of the support frame assembly, and the lifting linkage group is linked to the backrest transmission linkage group.

[0019] By adopting the above solution, the lifting linkage group can be operated in conjunction with the rotation of the backrest assembly to achieve the lifting effect on the front end of the swing seat assembly.

[0020] Furthermore, the front ends of the first and second rocker components are connected to a leg support mounting crossbar, and the four-way leg support assembly is mounted on the leg support mounting crossbar.

[0021] By adopting the above solution, the installation stability of the four-way leg support assembly is improved.

[0022] Furthermore, a swing base plate that swings synchronously with the swing seat assembly is connected below it. The lifting linkage assembly includes: a first swing rod, one end of which is rotatably connected to the support frame assembly; a second swing rod, one end of which is rotatably connected to the support frame assembly; a first driven rod, one end of which is rotatably connected to the front end of the swing base plate and the other end of which is rotatably connected to the middle of the first swing rod; a second driven rod, one end of which is rotatably connected to the rear end of the swing base plate and the other end of which is rotatably connected to the middle of the second swing rod; a first transmission rod, one end of which is rotatably connected to the other end of the first swing rod and the other end of which is rotatably connected to the middle of the second driven rod; and a second transmission rod, one end of which is connected to the middle of the first transmission rod and the other end of which is rotatably connected to the other end of the second swing rod.

[0023] By adopting the above scheme, when the swing seat assembly is driven by the drive motor, the first swing rod and the second swing rod will swing around the connection point of the support frame assembly under the driving force; at the same time, the function of the first transmission rod and the second transmission rod is to adjust and optimize the action path and force distribution of the entire transmission mechanism to ensure that the swing is smooth and meets the design requirements.

[0024] Furthermore, the backrest transmission linkage assembly includes: a first linkage, one end of which is rotatably connected to the backrest assembly; a second linkage, one end of which is rotatably connected to the other end of the first linkage, and the middle part of the second linkage is rotatably connected to the backrest rotation support arm; and a third linkage, one end of which is rotatably connected to the other end of the second linkage, and the other end of which is rotatably connected to the rear end of the support frame assembly.

[0025] By adopting the above solution, the backrest assembly can flip itself backward while the swing seat assembly swings forward, thus achieving a flat lying position.

[0026] In summary, the three-position sofa frame with four-way leg rest provided by this utility model has the following technical effects:

[0027] 1. Allows users to independently control the raising of the leg rest, while the backrest assembly remains relatively independent, thus achieving greater flexibility and personalized adjustments. Users can independently adjust the angle of their legs or backrest according to their needs and preferences to obtain the best sitting or reclining experience;

[0028] 2. Compared to traditional designs, this sofa frame simplifies the structure by reducing the number of motors. Traditional designs often require two motors to control the forward / backward and upward / lowering movements of the leg rests, respectively, to achieve four-way adjustment. This innovative design uses only one leg rest motor to control the tilting and lifting or tilting and resetting of the first leg rest mechanism, thereby reducing product complexity and manufacturing costs.

[0029] 3. Because the leg support mechanism uses a single motor, the overall size of the sofa frame is more compact, making it suitable for various home environments, especially for small apartments, where this design is more user-friendly. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0031] Figure 2 This is a side view structural diagram of the seated posture according to an embodiment of the present invention;

[0032] Figure 3 This is a side view structural diagram of the TV posture state according to an embodiment of the present utility model;

[0033] Figure 4 This is a side view structural diagram of the lying position according to an embodiment of the present invention;

[0034] Figure 5 This is a partial structural diagram of one side of an embodiment of the present utility model;

[0035] Figure 6This is an exploded view of a partial structure on one side of an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the four-way leg support assembly according to an embodiment of the present utility model.

[0037] The meanings of the reference numerals in the attached drawings are as follows: 1. Support frame assembly; 11. First support sidewall; 12. Second support sidewall; 13. First support rod; 14. Second support rod; 15. Connector; 2. Swing seat assembly; 21. First swing component; 22. Second swing component; 23. First crossbar; 24. Second crossbar; 25. Leg support mounting crossbar; 26. Swing base plate; 27. Assembly part; 3. Backrest assembly; 4. Four-way leg support assembly; 41. First leg support mechanism; 42. Leg support motor; 43. Motor base; 44. Second leg support mechanism; 45. Telescopic mechanism; 451. First telescopic arm; 452. Second telescopic arm; 4 53. Third telescopic arm; 46. Linkage assembly; 5. Drive motor; 51. Fixed part; 52. Movable part; 6. Backrest rotation support arm; 7. Backrest transmission linkage assembly; 71. First link; 72. Second link; 73. Third link; 8. Lifting linkage assembly; 81. First swing rod; 82. Second swing rod; 83. First driven rod; 84. Second driven rod; 85. First transmission rod; 86. Second transmission rod; 9. Rotation mechanism; 91. Third support rod; 911. First support arm; 912. Second support arm; 913. Tilting linkage component; 92. Assembly part; 100. Linkage arm; 110. Rotating arm. Detailed Implementation

[0038] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0039] To facilitate understanding of the embodiments of this utility model, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] 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 pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0042] See Embodiment 1 of this utility model. Figures 1-7 As shown, a three-position sofa frame with four-way leg rests is disclosed, including a support frame assembly 1, a swing seat assembly 2, a backrest assembly 3, and a four-way leg rest assembly 4. The swing seat assembly 2 is mounted above the support frame assembly 1, allowing it to swing back and forth relative to the support frame assembly 1. The backrest assembly 3 is operatively connected to the rear end of the swing seat assembly 2 and the rear end of the support frame assembly 1, enabling the backrest assembly 3 to rotate when the swing seat assembly 2 swings relative to the support frame assembly 1. The four-way leg rest assembly 4 is mounted at the front end of the swing seat assembly 2 and includes a first leg rest mechanism 41 and a leg rest motor 42. The leg rest motor 42 controls the first leg rest mechanism 41 to flip and lift or flip and return to its original position relative to the swing seat assembly 2. The swing seat assembly 2 can swing back and forth relative to the support frame assembly 1, and the backrest assembly 3 is operatively connected to the rear ends of both the swing seat assembly 2 and the support frame assembly 1. When the swing seat assembly 2 swings, it can drive the backrest assembly 3 to rotate independently. At the same time, the four-way leg support assembly 4 can be independently controlled by the leg support motor 42 to move forward and backward and lift. The overall structure is relatively simple, reducing the number of motors, thus solving the problems of high cost and large space occupation.

[0043] To improve the stability of the swing seat assembly 2 and the support frame assembly 1, preferably, the support frame assembly 1 includes a first support sidewall 11 and a second support sidewall 12, and the swing seat assembly 2 includes a first swing member 21 and a second swing member 22. The first support sidewall 11 and the second support sidewall 12 are arranged in parallel, as are the first swing member 21 and the second swing member 22. A first support rod 13 is connected between the rear end of the first support sidewall 11 and the rear end of the second support sidewall 12, and a second support rod 14 is connected between the front end of the first support sidewall 11 and the front end of the second support sidewall 12. In this embodiment 1, a bent connector 15 is provided between the first support rod 13 and the first support sidewall 11 and the second support sidewall 12, which is more conducive to their assembly. Optionally, the bent connector 15 can be integrally connected to the first support sidewall 11 or the second support sidewall 12. The support frame assembly 1, as the basic structure of the sofa frame, provides stable support and connection functions for other components. A first crossbar 23 and a second crossbar 24 connect the first rocker element 21 and the second rocker element 22. The first crossbar 23 is closer to the first support rod 13 than the second crossbar 24. In this embodiment 1, through the ingenious combination of the first rocker element 21, the second rocker element 22, the first crossbar 23, and the second crossbar 24, the rocker seat assembly 2 not only provides stable support and connection functions, but also realizes the back-and-forth rocking of the sofa seat and the tilt adjustment of the backrest.

[0044] In some embodiments, to achieve intelligent control of the frame, a drive motor 5 is also provided inside the frame. The drive motor 5 includes a fixed part 51 and a movable part 52. The fixed part 51 is rotatably connected to the first support rod 13, and the movable part 52 is rotatably connected to the first crossbar 23. The introduction of the drive motor 5 provides a power source for the three-position sofa frame with four-way leg rests, enabling the sofa seat to achieve various posture adjustments. Specifically, when the drive motor 5 is started, the movable part 52 moves towards the front end of the support frame assembly 1, thereby driving the first crossbar 23 to move towards the front end of the support frame assembly 1. The first crossbar 23 pushes the rear end of the swing seat assembly 2 to swing forward, completing the process of the sofa changing from a sitting posture to a reclining posture. In this embodiment 1, the drive motor 5 is a slider motor, the fixed part 51 is the body of the slider motor, and the movable part 52 is the slider part. In other embodiments, it can be replaced with a push rod motor or others.

[0045] In some embodiments, to enable the swing seat assembly 2 to create a swinging effect, a backrest rotation support arm 6 is typically provided between the swing seat assembly 2 and the backrest assembly 3. The backrest rotation support arm 6 is fixed to the swing seat assembly 2 and rotatably connected to the backrest assembly 3. A backrest transmission linkage group 7 is rotatably connected between the support frame assembly 1 and the backrest assembly 3. The backrest rotation support arm 6 provides stable rotational support for the backrest assembly 3, acting as a pivot and enabling tilt adjustment of the backrest assembly 3. Preferably, the backrest transmission linkage group 7, the support frame assembly 1, and the swing seat assembly 2 can form a structure similar to a parallelogram, thus achieving a back-and-forth swinging effect.

[0046] In some embodiments, in order to make the side of the swing seat assembly 2 closer to the legs rise while swinging in the process of lying flat for greater comfort, a lifting linkage group 8 is connected between the front end of the swing seat assembly 2 and the front end of the support frame assembly 1. The lifting linkage group 8 is linked to the backrest transmission linkage group 7, and the lifting linkage group 8 can be operated by the rotation of the backrest assembly 3 to achieve the lifting effect on the front end of the swing seat assembly 2.

[0047] It should be noted that the backrest assembly 3 is provided in two sets, which are respectively connected to the backrest rotation support arm 6 on the first rocker 21 and the second rocker, thereby improving the stability of the backrest switching.

[0048] Specifically, in this embodiment 1, a swing base plate 26 that swings synchronously with the swing seat assembly 2 is also connected below it. The lifting linkage group 8 includes a first swing rod 81, a second swing rod 82, a first driven rod 83, a second driven rod 84, a first transmission rod 85, and a second transmission rod 86. One end of the first swing rod 81 is rotatably connected to the support frame assembly 1. One end of the second swing rod 82 is rotatably connected to the support frame assembly 1. One end of the first driven rod 83 is rotatably connected to the front end of the swing base plate 26. The other end of the first driven rod 83 is rotatably connected to the middle of the first swing rod 81. One end of the second driven rod 84 is rotatably connected to the rear end of the swing base plate 26. The other end is rotatably connected to the middle of the second swing rod 82. One end of the first transmission rod 85 is rotatably connected to the other end of the first swing rod 81. The other end is rotatably connected to the middle of the second driven rod 84. One end of the second transmission rod 86 is connected to the middle of the first transmission rod 85. The other end is rotatably connected to the other end of the second swing rod 82. In other embodiments, one end of the first driven rod 83 can be directly rotatably connected to the swing seat assembly 2, and one end of the second driven rod 84 can be directly rotatably connected to the swing seat assembly 2. When the swing seat assembly 2 is driven by the drive motor 5, the first swing rod 81 and the second swing rod 82 will swing around the connection point of the support frame assembly 1 under the driving force; at the same time, the first transmission rod 85 and the second transmission rod 86 are used to adjust and optimize the action path and force distribution of the entire transmission mechanism to ensure that the swing is smooth and meets the design requirements.

[0049] Specifically, in this embodiment 1, the backrest transmission linkage group 7 includes a first link 71, a second link 72, and a third link 73. One end of the first link 71 is rotatably connected to the backrest assembly 3, one end of the second link 72 is rotatably connected to the other end of the first link 71, the middle part of the second link 72 is rotatably connected to the backrest rotating support arm 6, one end of the third link 73 is rotatably connected to the other end of the second link 72, and the other end is rotatably connected to the rear end of the support frame assembly 1. This allows the backrest assembly 3 to flip backward while the swing seat assembly 2 swings forward, achieving a flat lying state.

[0050] In some embodiments, optionally, a leg support mounting crossbar 25 is connected to the front end of the first rocking member 21 and the second rocking member 22, and the four-way leg support assembly 4 is mounted on the leg support mounting crossbar 25. This can improve the installation stability of the four-way leg support assembly 4. Preferably, the four-way leg support assembly 4 further includes a motor base 43, a second leg support mechanism 44, and a linkage assembly 46. The motor base 43 is mounted to the leg support motor 42, and a telescopic mechanism 45 is provided between the second leg support mechanism 44 and the first leg support mechanism 41, so that the second leg support mechanism 44 can extend or retract relative to the first leg support mechanism 41. The linkage assembly 46 is rotatably connected between the leg support motor 42 and the first leg support mechanism 41. The leg support can independently perform operations such as flipping and lifting, flipping and resetting, and extending or retracting, greatly improving the flexibility and adaptability of the sofa. In this embodiment 1, the leg support motor 42 is a push rod motor, the fixed part 51 is the body part of the push rod motor, and the movable part 52 is the push rod part. In other embodiments, a slider motor or other alternatives may be used.

[0051] In this embodiment 1, the linkage assembly 46 includes a rotating mechanism 9, a linkage arm 100, and a rotating arm 110. The rotating mechanism 9 is connected to one end of the motor base 43 near the first leg support mechanism 41. One end of the linkage arm 100 is rotatably connected to the motor base 43, and the other end is rotatably connected to one end of the first leg support mechanism 41 near the fixing part 51. One end of the rotating arm 110 is rotatably connected to the motor base 43, and the other end is rotatably connected to the first leg support mechanism 41. The rotating mechanism 9 includes a third support rod 91 and an assembly 27. The middle part of the third support rod 91 is connected to the motor base 43, and the assembly 27 is assembled at both ends of the third support rod 91. At the same time, both ends of the third support rod 91 are connected to the leg support mounting crossbar 25 through the assembly 27 to achieve support and fixation of the four-way leg support assembly 4. The third support rod 91 is also connected to a first support arm 911 and a second support arm 912 extending towards the first leg support mechanism 41. A flipping linkage 913 is hinged between the first support arm 911 and the second support arm 912 for connecting the telescopic mechanism 45. The telescopic mechanism 45 includes a first telescopic arm 451, a second telescopic arm 452, and a third telescopic arm 453. One end of the first telescopic arm 451 is rotatably connected to the flipping linkage 913, and one end of the second telescopic arm 452 is rotatably connected to the second leg support mechanism 44. One end of the third telescopic arm 453 is rotatably connected to the other end of the second telescopic arm 452, and the other end is rotatably connected to the first leg support mechanism 41. The middle part of the third telescopic arm 453 is rotatably connected to the other end of the first telescopic arm 451. Preferably, the position where the third telescopic arm 453 is rotatably connected to the other end of the first telescopic arm 451 is a portion slightly offset from the middle of the third telescopic arm 453 towards its other end, facilitating its own rotation. As the angle between the first leg support mechanism 41 and the drive motor 5 changes from an acute angle to an obtuse angle, the flipping linkage 913 between the first support arm 911 and the second support arm 912 gradually approaches the crossbar in the first leg support mechanism 41. This causes the other end of the first telescopic arm 451 to gradually pass over the second connecting crossbar. At this time, the other end of the third telescopic arm 453, constrained by the crossbar in the first leg support mechanism 41 and driven by the other end of the first telescopic arm 451, rotates about the other end of the third telescopic arm 453 as an axis. This causes one end of the third telescopic arm 453 to drive the second telescopic arm 452 to rotate away from the drive motor 5, thereby extending the second leg support mechanism 44 and completing the extension effect of the telescopic mechanism 45. This achieves control over the extension, folding, and elongation of the leg support in four directions.

[0052] In summary, the three-position sofa frame with four-way leg rest provided by this utility model has the following technical effects:

[0053] 1. Allows users to independently control the raising of the leg rest, while the backrest component 3 remains relatively independent, thus achieving greater flexibility and personalized adjustment. Users can independently adjust the angle of the legs or backrest according to their needs and preferences to obtain the best sitting or reclining experience;

[0054] 2. Compared to traditional designs, this sofa frame simplifies the structure by reducing the number of motors. In traditional designs, two motors are often needed to control the forward and backward movement and the lifting and lowering movement of the leg rests to achieve four-way adjustment. However, this invention uses only one leg rest motor 42 to control the flipping and lifting or flipping and resetting of the first leg rest mechanism 41 through innovative design, thereby reducing the complexity of the product and manufacturing costs;

[0055] 3. Because the leg support mechanism uses a single motor, the overall size of the sofa frame is more compact, making it suitable for various home environments, especially for small apartments, where this design is more user-friendly.

[0056] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A three-position sofa frame with four-way leg rests, characterized in that, include: Support frame assembly (1); A swing seat assembly (2) is mounted above the support frame assembly (1) so that the swing seat assembly (2) can swing back and forth relative to the support frame assembly (1); Backrest assembly (3), which is connected to the rear end of the swing seat assembly (2) and the rear end of the support frame assembly (1) respectively, and is used to enable the backrest assembly (3) to rotate when the swing seat assembly (2) swings relative to the support frame assembly (1). The four-way leg support assembly (4) is mounted on the front end of the swing seat assembly (2). The four-way leg support assembly (4) includes a first leg support mechanism (41) and a leg support motor (42). The leg support motor (42) is used to control the first leg support mechanism (41) to flip and lift or flip and reset relative to the swing seat assembly (2).

2. The three-position sofa frame with four-way leg rests according to claim 1, characterized in that, The four-way leg support assembly (4) also includes: Motor mount (43), which is assembled with the leg support motor (42); A second leg support mechanism (44) is provided with a telescopic mechanism (45) between the second leg support mechanism (44) and the first leg support mechanism (41) so that the second leg support mechanism (44) can extend or retract relative to the first leg support mechanism (41). Linkage component (46) is rotatably connected between the leg support motor (42) and the first leg support mechanism (41).

3. The three-position sofa frame with four-way leg rests according to claim 1, characterized in that, The support frame assembly (1) includes a first support sidewall (11) and a second support sidewall (12). A first support rod (13) is connected between the rear end of the first support sidewall (11) and the rear end of the second support sidewall (12). A second support rod (14) is connected between the front end of the first support sidewall (11) and the front end of the second support sidewall (12).

4. A three-position sofa frame with four-way leg rests according to claim 3, characterized in that, The swing seat assembly (2) includes a first swing member (21) and a second swing member (22), with a first crossbar (23) and a second crossbar (24) connected between the first swing member (21) and the second swing member (22), and the first crossbar (23) being closer to the first support rod (13) than the second crossbar (24).

5. A three-position sofa frame with four-way leg rests according to claim 4, characterized in that, It also includes a drive motor (5), which includes a fixed part (51) and a movable part (52). The fixed part (51) is rotatably connected to the first support rod (13), and the movable part (52) is rotatably connected to the first crossbar (23).

6. The iron frame of a three-position sofa with four-way leg rests according to claim 1, characterized in that, A backrest rotation support arm (6) is provided between the swing seat assembly (2) and the backrest assembly (3). The backrest rotation support arm (6) is fixed to the swing seat assembly (2) and rotatably connected to the backrest assembly (3). A backrest transmission linkage group (7) is rotatably connected between the support frame assembly (1) and the backrest assembly (3).

7. A three-position sofa frame with four-way leg rests according to claim 6, characterized in that, A lifting linkage group (8) is connected between the front end of the swing seat assembly (2) and the front end of the support frame assembly (1), and the lifting linkage group (8) is linked to the backrest transmission linkage group (7).

8. A three-position sofa frame with four-way leg rests according to claim 4, characterized in that, The front ends of the first rocker (21) and the second rocker (22) are connected to a leg support mounting crossbar (25), and the four-way leg support assembly (4) is mounted on the leg support mounting crossbar (25).

9. A three-position sofa frame with four-way leg rests according to claim 7, characterized in that, The swing seat assembly (2) is connected to a swing base plate (26) that swings synchronously with it, and the lifting linkage assembly (8) includes: A first swing rod (81), one end of which is rotatably connected to the support frame assembly (1); The second swing rod (82) has one end rotatably connected to the support frame assembly (1); The first driven rod (83) has one end rotatably connected to the front end of the swing base plate (26) and the other end rotatably connected to the middle part of the first swing rod (81). The second driven rod (84) has one end rotatably connected to the rear end of the swing base plate (26) and the other end rotatably connected to the middle part of the second swing rod (82); The first transmission rod (85) has one end rotatably connected to the other end of the first swing rod (81) and the other end rotatably connected to the middle of the second driven rod (84). The second transmission rod (86) has one end connected to the middle of the first transmission rod (85) and the other end rotatably connected to the other end of the second swing rod (82).

10. A three-position sofa frame with four-way leg rests according to claim 6, characterized in that, The backrest transmission linkage assembly (7) includes: The first link (71) is rotatably connected to the backrest assembly (3) at one end; The second link (72) has one end rotatably connected to the other end of the first link (71), and the middle part of the second link (72) is rotatably connected to the backrest rotating support arm (6). The third link (73) has one end rotatably connected to the other end of the second link (72) and the other end rotatably connected to the rear end of the support frame assembly (1).

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