Dual-motor stretching sofa frame

Abstract

The utility model discloses a dual-motor stretching sofa frame in the field of sofa frames. The dual-motor stretching sofa frame comprises a base assembly, a seat frame assembly, a backrest assembly, a frame leg assembly, a first motor stretching assembly and a second motor stretching assembly, the driving end of the first motor stretching assembly is hinged to the backrest assembly, so that the backrest assembly is switched between a lying posture state and a sitting posture state; the base assembly comprises a connecting side plate, a cross rod, a swing rod and a cross arm, the cross rod, the swing rod and the cross arm are all hinged to the connecting side plate, the driving end of the second motor stretching assembly is hinged to the seat frame assembly through the cross rod, the seat frame assembly is hinged to the swing rod, and the frame leg assembly is hinged to the cross arm; the second motor stretching assembly drives the seat frame assembly to move through the cross rod, and the seat frame assembly drives the swing rod to swing, so that the frame leg assembly is switched between the lying posture state and the sitting posture state. The dual-motor design is adopted, so that the problem of asynchronous actions among different components during single-motor driving is avoided, and the coordination and the stability in the sofa frame switching process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sofa frame technical field, specifically, relate to a sofa frame of double motor extension. BACKGROUND

[0002] In the field of furniture, as people's daily life commonly used seat, its functionality and comfort increasingly attract attention. The current market sofa frame, most can only realize simple function, there is certain limitation in meeting the user's diversified use demand.

[0003] Many traditional sofa frame adopts simple mechanical structure, only relies on manual operation or single motor drive to realize the sitting and lying switch of sofa. However, manual operation not only consumes the user's physical strength, and the operation process is complicated, and the old and children are not friendly. And the sofa frame of single motor drive, since the single power source, cannot provide accurate power support according to the different needs of backrest and leg, lead to the inconsistent action of different components in the switching process. For example, when the user tries to adjust the sofa to lying position, often the backrest angle has been adjusted to the desired position, but the extension of the leg is not synchronized, or the extension is insufficient, overextension, etc. Influence the overall use experience and comfort of sofa, reduce the practicability and user satisfaction of product.

[0004] The above defects, need to be solved urgently. INVENTION CONTENTS

[0005] In order to solve the problem that the existing single motor driven sofa frame is prone to inconsistent action of different components in the switching process, the utility model provides a sofa frame of double motor extension.

[0006] The utility model technical scheme is as follows:

[0007] A sofa frame of double motor extension, including base assembly, seat frame assembly, backrest assembly, leg assembly, first motor extension assembly, second motor extension assembly;

[0008] The drive end of the first motor extension assembly is hinged with the backrest assembly, so that the backrest assembly is switched between the lying position and the sitting position;

[0009] The base assembly includes a connecting side plate, a horizontal rod, a swing rod and a horizontal arm, the horizontal rod, the swing rod and the horizontal arm are all hinged with the connecting side plate, the drive end of the second motor extension assembly is hinged with the seat frame assembly through the horizontal rod, and the seat frame assembly is hinged with the swing rod, and the leg assembly is hinged with the horizontal arm;

[0010] The second motor stretching assembly drives the seat frame assembly to move, and the seat frame assembly drives the swing rod to swing, so that the leg frame assembly is switched between the lying state and the sitting state.

[0011] According to the utility model, the first limiting column is arranged on the seat frame assembly, and the limiting groove is arranged on the backrest assembly, so that the limiting groove and the first limiting column are clamped when the backrest assembly is stretched to the preset angle.

[0012] According to the utility model, the second limiting column is arranged on the seat frame assembly, so that the swing rod and the second limiting column abut when the leg frame assembly is in the sitting state.

[0013] According to the utility model, the cross rod comprises a rod part and two swing parts, the two swing parts are arranged at two ends of the rod part respectively, one end of the swing part is hinged to the connecting side plate, the other side of the swing part is hinged to the seat frame assembly, and the driving end of the second motor stretching assembly is hinged to the rod part.

[0014] According to the utility model, the second motor stretching assembly comprises a driving rod, a driving block is arranged on the driving rod, L-shaped connecting plates are arranged at two sides of the driving block respectively, one end of the L-shaped connecting plate is hinged to the driving block, and the other end of the L-shaped connecting plate is connected to the rod part.

[0015] According to the utility model, the base assembly further comprises a connecting horizontal plate, a bottom plate and a rotating shaft, two connecting side plates are connected to the connecting horizontal plate at two ends respectively, a connecting part is arranged on the bottom plate, the bottom of the rotating shaft is rotationally connected to the connecting part, the top of the rotating shaft is rotationally connected to the connecting horizontal plate, and the rotating shaft is arranged below one L-shaped connecting plate.

[0016] According to the utility model, a limiting assembly is arranged on the rotating shaft, the limiting assembly comprises a limiting sleeve, a locking disc and an abutting disc, the limiting sleeve is arranged at the top of the connecting part and is sleeved on the upper side of the rotating shaft, the locking disc is arranged between the limiting sleeve and the connecting part, the abutting disc is arranged at the top of the limiting sleeve, and a plurality of insertion columns are arranged at the bottom of the abutting disc, the L-shaped connecting plate and the abutting disc abut when the backrest assembly is stretched to the preset angle, and the plurality of insertion columns and the locking disc are inserted, so that the connecting horizontal plate and the bottom plate are prevented from rotating relative to each other.

[0017] The utility model provides according to above -mentioned scheme, the limiting assembly still includes the locating rack, the locating rack sets up below the abutment disc, and the locating rack is set in the outer side of the limiting sleeve, be provided with a plurality of first locating hole with the plug -in column one -to-one correspondence on the locating rack, correspondingly be provided with a plurality of second locating hole on the connecting cross board, correspondingly be provided with a plurality of locking hole on the locking disc, when the backrest assembly stretches to the preset angle, the plug -in column is sequentially inserted through corresponding first locating hole, corresponding second locating hole and corresponding locking hole, and the elastic member is set in the plug -in column.

[0018] The utility model provides according to above -mentioned scheme, the frame leg subassembly includes two symmetrical frame leg rod groups, the frame leg rod group includes mounting rod, first connecting rod, second connecting rod, first frame leg rod, second frame leg rod, third connecting rod, fourth connecting rod, fifth connecting rod, the mounting rod is connected with the seat frame subassembly, one end of the cross bar is hinged with the connecting side plate, the other end of the cross bar is hinged with the first connecting rod, the first connecting rod is hinged with the mounting rod near one end of the cross bar, the first connecting rod is hinged with one end of the second connecting rod away from the cross bar, the other end of the second connecting rod is hinged with one end of the first frame leg rod, the other end of the first frame leg rod is hinged with the second frame leg rod, one end of the third connecting rod is hinged with the mounting rod, the other end of the third connecting rod is hinged with one end of the fourth connecting rod, and the third connecting rod is hinged with the second connecting rod, the other end of the fourth connecting rod is hinged with one end of the fifth connecting rod, and the other end of the fifth connecting rod is hinged with the second frame leg rod.

[0019] The utility model provides according to above -mentioned scheme, when the frame leg subassembly is in the lying posture, in the orthographic projection direction, the orthographic projection of the second connecting rod overlaps with the orthographic projection of the fourth connecting rod, and there is no gap between the orthographic projection of the second connecting rod and the orthographic projection of the fourth connecting rod.

[0020] The utility model provides according to above -mentioned scheme, and its beneficial effect lies in:

[0021] The above-mentioned sofa frame of double motor stretching, first stretching subassembly controls backrest subassembly switches between lying posture and sitting posture, and second stretching subassembly controls frame leg subassembly switches between lying posture and sitting posture, adopts double motor design, ensures that backrest subassembly and frame leg subassembly can independently and according to preset trajectory movement, avoids the problem that different components are out of sync when single motor drives, improves the coordination and stability in the whole sofa frame switching process, improves the experience of user. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is structural schematic diagram when the utility model is in lying posture;

[0023] Figure 2 for Figure 1 Enlarged view of section A;

[0024] Figure 3 for Figure 1 Enlarged view of section B;

[0025] Figure 4 This is a front view of the present invention in a lying position;

[0026] Figure 5 This is a structural diagram of the present invention in a seated position;

[0027] Figure 6 for Figure 5 Enlarged view of section C;

[0028] Figure 7 for Figure 5 Enlarged view of section D;

[0029] Figure 8 This is a structural diagram of the seat frame assembly;

[0030] Figure 9 A schematic diagram of the structure of the second motor extension assembly;

[0031] Figure 10 This is a structural diagram of the base assembly in a lying position.

[0032] Figure 11 for Figure 10 Enlarged view of section E in the middle;

[0033] Figure 12 This is a structural diagram of the base assembly in a seated position.

[0034] Figure 13 for Figure 12 Enlarged view of section F in the middle;

[0035] Figure 14 This is a breakdown diagram of the limit component;

[0036] Figure 15 This is a partial structural diagram of the limiting component;

[0037] Figure 16 This is a schematic diagram illustrating the application of the support leg assembly and the base assembly;

[0038] Figure 17 This is a structural schematic diagram of the support leg assembly.

[0039] In the diagram, 1. Base assembly; 11. Connecting side plate; 12. First crossbar; 121. Rod part; 122. Swinging part; 13. Swinging rod; 14. Cross arm; 15. Connecting cross plate; 16. Base plate; 161. Connecting part; 17. Rotating shaft; 18. Limiting assembly; 181. Limiting sleeve; 182. Locking plate; 1821. Locking hole; 183. Abutment plate; 184. Insertion post; 185. Positioning frame; 1851. First positioning hole; 186. Elastic element; 19. Second crossbar;

[0040] 2. Seat frame assembly; 21. First limiting post; 22. Second limiting post;

[0041] 3. Backrest assembly; 31. Limiting groove;

[0042] 4. Leg assembly; 41. Leg rod assembly; 411. Mounting rod; 412. First link; 413. Second link; 414. First leg rod; 415. Second leg rod; 416. Third link; 417. Fourth link; 418. Fifth link;

[0043] 5. First motor extension assembly;

[0044] 6. Second motor extension assembly; 61. Drive rod; 62. Drive block; 63. L-shaped connecting piece. Detailed Implementation

[0045] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model 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 this utility model and are not intended to limit this utility model.

[0046] like Figure 1 As shown, this utility model provides a sofa frame with dual motor extension, including a base assembly 1, a seat frame assembly 2, a backrest assembly 3, a leg assembly 4, a first motor extension assembly 5, and a second motor extension assembly 6; the fixed end of the first motor extension assembly 5 is hinged to the seat frame assembly, and the driving end of the first motor extension assembly 5 is hinged to the backrest assembly 3. The first motor extension assembly 5 drives the backrest assembly 3 independently, and can switch between a reclining state and a sitting state according to the actual needs of the backrest assembly 3 when switching between different states.

[0047] like Figure 1 , Figure 10 , Figure 12As shown, the base assembly 1 includes a connecting side plate 11, a first crossbar 12, a swing rod 13, and a cross arm 14. The first crossbar 12, the swing rod 13, and the cross arm 14 are all hinged to the connecting side plate 11. The drive end of the second motor extension assembly 6 is hinged to the seat frame assembly 2 through the first crossbar 12, and the seat frame assembly 2 is hinged to the swing rod 13. The leg assembly 4 is hinged to the cross arm 14. The second motor extension assembly 6 drives the seat frame assembly 2 to move through the first crossbar 12, and the seat frame assembly 2 drives the swing rod 13 to swing, so that the leg assembly 4 can switch between a reclining state and a sitting state.

[0048] In this embodiment, the first extension component controls the backrest assembly 3 to switch between a reclining state and a sitting state, and the second extension component controls the leg assembly 4 to switch between a reclining state and a sitting state. The dual-motor design ensures that the backrest assembly 3 and the leg assembly 4 can move independently and according to a preset trajectory, avoiding the problem of asynchronous movement between different components when driven by a single motor. This improves the coordination and stability of the entire sofa frame switching process, ensures the stability and reliability of the overall sofa frame structure, and enhances the user experience.

[0049] In this embodiment, when the leg support assembly 4 is in a lying position, the height of the side of the leg support assembly 4 away from the second motor extension assembly 6 is greater than the height of the seat frame assembly 2, which can better support the user's legs, so that the body is in a more natural and comfortable posture when lying down, reducing the pressure on the waist and legs and improving the comfort of lying down.

[0050] like Figure 4 As shown, in this embodiment, when both the leg assembly 4 and the backrest assembly 3 are extended to a preset angle, the sofa is in a zero-gravity posture. This allows the user's knees and heart to be roughly on the same horizontal plane when lying down, increasing the force-bearing area of ​​the body and ensuring that all parts of the body receive balanced pressure without feeling oppressive. Specifically, the angle between the backrest assembly 3 and the seat frame assembly 2 can be designed to be 137°. Of course, in actual design, the angle between the backrest assembly 3 and the seat frame assembly 2 can be designed according to actual needs to meet the requirements of zero gravity.

[0051] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 8As shown, in the embodiment, the seat frame assembly 2 is provided with a first limiting column 21, and the backrest assembly 3 is provided with a limiting groove 31, when the backrest assembly 3 is stretched to a preset angle, the limiting groove 31 is clamped with the first limiting column 21. In the process of using the sofa, if the backrest assembly 3 is stretched too much, it may cause the user's center of gravity to be unbalanced and fall backward, especially for the weak balance of the crowd such as the elderly, children, etc. This situation has a great safety hazard. The clamping design of the limiting groove 31 and the first limiting column 21 can accurately limit the stretching range of the backrest assembly 3, when reaching the preset angle, the two are clamped to prevent the backrest from continuing to stretch backward, effectively avoiding the danger brought by excessive stretching, and providing a safer use environment for the user. In addition, after the limiting groove 31 and the first limiting column 21 are clamped, the stability of the backrest assembly 3 can be enhanced, resisting certain external interference, preventing the backrest from moving suddenly and causing harm to the user, and ensuring the safety of the user when resting or moving on the sofa.

[0052] As shown in Figure 1 , Figure 3 , Figure 5 , Figure 7 , Figure 8 As shown, in the embodiment, the seat frame assembly 2 is provided with a second limiting column 22, when the leg rest assembly 4 is in a sitting position, the swing rod 13 abuts against the second limiting column 22, which can effectively prevent the seat frame from displacement or shaking due to uneven force during the user's sitting process, maintaining the stability of the sofa in the sitting position. In addition, the second limiting column 22 limits the activity range of the swing rod 13, avoiding excessive movement of the leg rest assembly 4 in the sitting position due to accidental force.

[0053] As shown in Figure 5 , Figure 6 As shown in the embodiment, the first cross rod 12 includes a rod part 121 and two swing parts 122, the two swing parts 122 are respectively arranged at both ends of the rod part 121, and one end of the swing part 122 is hinged with the connecting side plate 11, and the other side of the swing part 122 is hinged with the seat frame assembly 2, and the driving end of the second motor stretching assembly 6 is hinged with the rod part 121. Since the rod part 121 is connected with the two swing parts 122, the driving force of the second motor stretching assembly 6 can be efficiently and uniformly distributed to the two swing parts 122 at both ends, and then transmitted to the seat frame assembly 2, so that the seat frame assembly 2 can obtain stable and strong power support during movement, ensuring the smoothness and stability of the movement of the seat frame assembly 2, and making the sofa more rapid and stable when switching between sitting and lying states.

[0054] As shown in Figure 9As shown, in the embodiment, the second motor stretching assembly 6 comprises a driving rod 61, a driving block 62 is arranged on the driving rod 61, two sides of the driving block 62 are respectively provided with L-shaped connecting plates 63, one end of the L-shaped connecting plate 63 is hinged to the driving block 62, and the other end of the L-shaped connecting plate 63 is connected with the rod part 121. After the second motor stretching assembly 6 is started, the driving rod 61 drives the driving block 62 to move, so that the L-shaped connecting plate 63 rotates around the hinge point of the driving block 62, thereby stably transmitting the movement of the driving block 62 to the rod part 121, and driving the rod part 121 to move through the swing part 122. Since the swing rod 13 is hinged to the seat frame assembly 2, the swing rod 13 rotates around the hinge point of the connecting side plate 11, so that the horizontal arm 14 rotates around the hinge point of the connecting side plate 11, and further drives the leg assembly 4 to stretch or retract, thereby achieving switching between the sitting state and the lying state. The driving rod 61 drives the driving block 62 to move linearly, and the L-shaped connecting plate 63 is hinged at one end to the driving block 62, which can convert the linear movement of the driving block 62 into rotary movement around the hinge point, and further reliably transmit to the rod part 121, avoiding impact and jamming in the power transmission process, ensuring that the seat frame assembly 2 can obtain continuous and stable power during movement, ensuring smooth and smooth sofa sitting and lying switching process, and improving user experience.

[0055] As shown in Figure 10 , Figure 12 In the embodiment, the base assembly 1 further comprises a connecting cross plate 15, a bottom plate 16 and a rotating shaft 17. The two ends of the connecting cross plate 15 are respectively connected with the two connecting side plates 11. The bottom plate 16 is provided with a connecting part 161. The bottom of the rotating shaft 17 is rotatably connected with the connecting part 161. The top of the rotating shaft 17 is rotatably connected with the connecting cross plate 15, and the rotating shaft 17 is arranged below one of the L-shaped connecting plates 63. When the sofa is subjected to pressure or other external force of the user, the rotating shaft 17 can act as a stable support point to effectively transmit the force from the connecting cross plate 15 to the bottom plate 16. In addition, the connecting cross plate 15 can rotate around the rotating shaft 17, so that the cushion part of the sofa can rotate at a certain angle. The user can flexibly adjust the direction of the sofa according to his own needs and use scene.

[0056] As shown in Figure 10 to Figure 14As shown, in the embodiment, the rotating shaft 17 is provided with a limiting assembly 18, the limiting assembly 18 comprises a limiting sleeve 181, a locking disc 182 and an abutting disc 183, the limiting sleeve 181 is arranged on the top of the connecting portion 161 and is sleeved on the upper side of the rotating shaft 17, the locking disc 182 is arranged between the limiting sleeve 181 and the connecting portion 161, and the abutting disc 183 is arranged on the top of the limiting sleeve 181, and a plurality of inserting columns 184 are arranged on the bottom of the abutting disc 183, when the backrest assembly 3 is stretched to a preset angle, the L-shaped connecting sheet 63 abuts against the abutting disc 183, and the plurality of inserting columns 184 are inserted with the locking disc 182, so as to prevent the connecting horizontal plate 15 from rotating relative to the bottom plate 16, and effectively avoid safety accidents caused by accidental rotation of the sofa, and provide a safer use environment for the user. In addition, it can provide a clear feedback to the user, so that the user knows that the sofa has reached the appropriate position and is fixed, so that the operation is more simple and easy to understand, without additional judgment and adjustment, and the convenience of use is improved.

[0057] As shown in the drawings, Figure 14 As shown, in the embodiment, the limiting assembly 18 further comprises a positioning frame 185, the positioning frame 185 is arranged below the abutting disc 183 and is sleeved on the outer side of the limiting sleeve 181, a plurality of first positioning holes 1851 corresponding to the inserting columns 184 are arranged on the positioning frame 185, a plurality of second positioning holes corresponding to the first positioning holes 1851 are arranged on the connecting horizontal plate 15, and a plurality of locking holes 1821 corresponding to the first positioning holes 1851 are arranged on the locking disc 182, when the backrest assembly 3 is stretched to a preset angle, the inserting columns 184 are inserted through the corresponding first positioning holes 1851, the corresponding second positioning holes and the corresponding locking holes 1821 in sequence, so as to prevent the connecting horizontal plate 15 from rotating relative to the bottom plate 16, and further prevent the seat frame assembly 2 from rotating, so that the sofa can stably maintain the state after the user adjusts to a comfortable sitting or lying posture, and the angle or position is not changed due to slight action or external force, thereby providing the user with a continuous and stable comfortable experience. In addition, during use of the sofa, especially when the backrest is stretched and the user is in a lying state, if the seat frame assembly 2 suddenly rotates, the user may lose balance and fall, and there is a great safety hazard, and the arrangement of the limiting assembly 18 ensures the safety of the user on the sofa, especially for the old, children and people with difficulty in moving, which increases the sense of security when using the sofa.

[0058] As shown in the drawings, Figure 15As shown, in this embodiment, the elastic member 186 is sleeved on the insertion column 184, which can be designed as a spring. When the backrest assembly 3 is converted from the lying state to the sitting state, the insertion column 184 originally inserted into each positioning hole and locking hole 1821 needs to be pulled out. When the insertion column 184 is inserted into the locking hole 1821 on the locking disc 182, the spring is compressed, thereby elastically deformed; when the insertion column 184 is pulled out of the locking hole 1821 on the locking disc 182, the spring releases energy to restore deformation, quickly pulling the insertion column 184 back to the initial position without manual operation, greatly simplifying the steps of adjusting the sofa state, saving time and effort, and enabling users to change the use form of the sofa more easily and quickly. In addition, the buffering effect of the spring can effectively reduce the wear and tear between the insertion column 184 and the positioning hole and the locking hole 1821. When the spring is stressed, it will absorb part of the energy, reducing the direct force between the insertion column 184 and the hole wall, thereby reducing wear and tear and prolonging the service life of each component.

[0059] As shown in the drawings, Figure 16 In this embodiment, the base assembly 1 further comprises a second cross bar 19, the two ends of the second cross bar 19 are respectively arranged on the two connecting side plates 11, and the connecting side plates 11 together constitute a more stable frame structure, enhancing the rigidity and strength of the base assembly 1 as a whole. In addition, the first cross bar 12 and the second cross bar 19 are arranged at intervals, and when the second motor extension assembly 6 works, the power and the reaction force generated thereby will be transmitted to the connecting side plates 11 through the second cross bar 19, and then dispersed to the entire base structure by the connecting side plates 11, avoiding the case of excessive local stress and reducing the risk of damage to components due to long-term bearing of concentrated stress, thereby prolonging the service life of the sofa. In addition, the fixed end of the second motor extension assembly 6 is connected with the second cross bar 19, so that the second motor extension assembly 6 can maintain a stable position during operation, which helps the second motor extension assembly 6 to accurately transmit power to the first cross bar 12, thereby realizing the extension and contraction of the backrest assembly 3 and the leg assembly 4.

[0060] As shown in the drawings, Figure 16 , Figure 17As shown, in the embodiment, the leg assembly 4 comprises two symmetrically arranged leg rod groups 41, each of which comprises a mounting rod 411, a first connecting rod 412, a second connecting rod 413, a first leg rod 414, a second leg rod 415, a third connecting rod 416, a fourth connecting rod 417, and a fifth connecting rod 418. The mounting rod 411 is connected with the seat frame assembly 2, one end of the first cross rod 12 is hingedly connected with the connecting side plate 11, the other end of the first cross rod 12 is hingedly connected with the first connecting rod 412, the end of the first connecting rod 412 close to the first cross rod 12 is hingedly connected with the mounting rod 411, the end of the first connecting rod 412 away from the first cross rod 12 is hingedly connected with one end of the second connecting rod 413, the other end of the second connecting rod 413 is hingedly connected with one end of the first leg rod 414, the other end of the first leg rod 414 is hingedly connected with the second leg rod 415, one end of the third connecting rod 416 is hingedly connected with the mounting rod 411, the other end of the third connecting rod 416 is hingedly connected with one end of the fourth connecting rod 417, and the third connecting rod 416 is hingedly connected with the second connecting rod 413, the other end of the fourth connecting rod 417 is hingedly connected with one end of the fifth connecting rod 418, and the other end of the fifth connecting rod 418 is hingedly connected with the second leg rod 415.

[0061] When working, the driving rod 61 of the second motor stretching assembly 6 drives the driving block 62 to move, so that the L-shaped connecting plate 63 rotates around the hinge joint between the L-shaped connecting plate 63 and the driving block 62, thereby stably transmitting the movement of the driving block 62 to the rod part 121, so that the rod part 121 drives the seat frame assembly 2 to move through the swing part 122. Since the swing rod 13 is hingedly connected with the seat frame assembly 2, the swing rod 13 rotates around the hinge joint between the swing rod 13 and the connecting side plate 11, so that the cross arm 14 rotates around the hinge joint between the cross arm 14 and the connecting side plate 11, thereby driving the first connecting rod 412 to move, so that the second connecting rod 413, the first leg rod 414, the second leg rod 415, the third connecting rod 416, the fourth connecting rod 417, and the fifth connecting rod 418 cooperate with each other, thereby realizing the stretching or contraction of the leg rod group 41. The leg assembly 4 comprises a complex linkage structure formed by multiple connecting rods. When the user places the legs on the leg assembly, the weight and pressure of the human body are transmitted through the connecting rods, thereby avoiding the situation that a single point is subjected to excessive force, so that the entire leg assembly 4 can more stably support the weight of the human body, thereby reducing the risk that the components are damaged due to excessive local force and prolonging the service life of the sofa. In addition, the use of two leg rods can prolong the force point of the leg and improve the stability of the leg assembly 4.

[0062] As Figure 17As shown, in the embodiment, when the leg rest assembly 4 is in the lying position, in the direction of orthographic projection, the orthographic projection of the second connecting rod 413 overlaps the orthographic projection of the fourth connecting rod 417, and there is no gap between the orthographic projection of the second connecting rod 413 and the orthographic projection of the fourth connecting rod 417. It plays a protective role, thereby preventing hand or foot from being pinched. In the process of daily use of the sofa, especially when children or the elderly with difficulty in movement are present, they may inadvertently place their hands or feet near the leg rest assembly 4. When the leg rest assembly 4 is in the lying position, the orthographic projection of the third connecting rod 416 overlaps the orthographic projection of the fourth connecting rod 417 and there is no gap, thereby providing a safe and reliable use environment for the user.

[0063] It should be understood that, for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.

[0064] The above has described the utility model patent by way of example in combination with the drawings. Obviously, the implementation of the utility model patent is not limited by the above manner. Any improvement or change using the method concept and technical solution of the utility model patent, or directly applying the concept and technical solution of the utility model patent to other occasions without improvement, shall be within the protection scope of the utility model.

Claims

1. A dual motor extended sofa frame, characterized in that, The base assembly, the seat frame assembly, the backrest assembly, the leg assembly, the first motor extension assembly, and the second motor extension assembly; The driving end of the first motor extension assembly is hinged to the backrest assembly, so that the backrest assembly is switched between the lying state and the sitting state; The base assembly comprises a connecting side plate, a crossbar, a swing bar, and a cross arm, the crossbar, the swing bar, and the cross arm are all hinged to the connecting side plate, the driving end of the second motor extension assembly is hinged to the seat frame assembly through the crossbar, and the seat frame assembly is hinged to the swing bar, and the leg assembly is hinged to the cross arm; The second motor extension assembly drives the seat frame assembly to move, and the seat frame assembly drives the swing bar to swing, so that the leg assembly is switched between the lying state and the sitting state.

2. The dual-motor extended sofa frame of claim 1, wherein, The seat frame assembly is provided with a first limiting column, and the backrest assembly is provided with a limiting groove, when the backrest assembly is extended to a preset angle, the limiting groove is clamped with the first limiting column.

3. The dual-motor extended sofa frame of claim 1, wherein, The seat frame assembly is provided with a second limiting column, when the leg assembly is in the sitting state, the swing bar abuts against the second limiting column.

4. The dual-motor extended sofa frame of claim 1, wherein, The crossbar comprises a rod part and two swing parts, the two swing parts are respectively arranged at the two ends of the rod part, one end of the swing part is hinged to the connecting side plate, the other end of the swing part is hinged to the seat frame assembly, and the driving end of the second motor extension assembly is hinged to the rod part.

5. The dual-motor extended sofa frame of claim 4, wherein, The second motor extension assembly comprises a driving rod, the driving rod is provided with a driving block, the two sides of the driving block are respectively provided with L-shaped connecting plates, one end of the L-shaped connecting plate is hinged to the driving block, and the other end of the L-shaped connecting plate is connected to the rod part.

6. The dual-motor extended sofa frame of claim 5, wherein, The base assembly further comprises a connecting cross plate, a bottom plate, and a rotating shaft, the two ends of the connecting cross plate are respectively connected to the two connecting side plates, the bottom plate is provided with a connecting part, the bottom of the rotating shaft is rotationally connected to the connecting part, the top of the rotating shaft is rotationally connected to the connecting cross plate, and the rotating shaft is arranged below one of the L-shaped connecting plates.

7. The dual-motor extended sofa frame of claim 6, wherein, The rotating shaft is provided with a limiting assembly, the limiting assembly comprises a limiting sleeve, a locking disc, and an abutting disc, the limiting sleeve is arranged at the top of the connecting part and is sleeved on the upper side of the rotating shaft, the locking disc is arranged between the limiting sleeve and the connecting part, the abutting disc is arranged at the top of the limiting sleeve, and the bottom of the abutting disc is provided with a plurality of insertion columns, when the backrest assembly is extended to a preset angle, the L-shaped connecting plate abuts against the abutting disc, and a plurality of the insertion columns are inserted with the locking disc, so as to prevent the connecting cross plate from rotating relative to the bottom plate.

8. The dual-motor extended sofa frame of claim 7, wherein, The limiting assembly further comprises a positioning frame arranged below the abutting disc and sleeved outside the limiting sleeve, a plurality of first positioning holes corresponding to the inserting columns are arranged on the positioning frame, a plurality of second positioning holes corresponding to the connecting horizontal plate are arranged on the connecting horizontal plate, and a plurality of locking holes corresponding to the locking disc are arranged on the locking disc, when the backrest assembly is stretched to a preset angle, the inserting columns are sequentially inserted through the corresponding first positioning holes, the corresponding second positioning holes and the corresponding locking holes, and the elastic members are sleeved on the inserting columns.

9. The dual-motor extended sofa frame of claim 1, wherein, The leg assembly comprises two symmetrically arranged leg rod groups, the leg rod group comprises a mounting rod, a first connecting rod, a second connecting rod, a first leg rod, a second leg rod, a third connecting rod, a fourth connecting rod and a fifth connecting rod, the mounting rod is connected with the seat frame assembly, one end of the horizontal rod is hingedly connected with the connecting side plate, the other end of the horizontal rod is hingedly connected with the first connecting rod, one end of the first connecting rod close to the horizontal rod is hingedly connected with the mounting rod, the other end of the first connecting rod away from the horizontal rod is hingedly connected with one end of the second connecting rod, the other end of the second connecting rod is hingedly connected with one end of the first leg rod, the other end of the first leg rod is hingedly connected with the second leg rod, one end of the third connecting rod is hingedly connected with the mounting rod, the other end of the third connecting rod is hingedly connected with one end of the fourth connecting rod, the third connecting rod is hingedly connected with the second connecting rod, the other end of the fourth connecting rod is hingedly connected with one end of the fifth connecting rod, and the other end of the fifth connecting rod is hingedly connected with the second leg rod.

10. The dual-motor extended sofa frame of claim 9, wherein, When the leg assembly is in a lying state, in the orthographic projection direction, the orthographic projection of the second connecting rod overlaps the orthographic projection of the fourth connecting rod, and there is no gap between the orthographic projection of the second connecting rod and the orthographic projection of the fourth connecting rod.

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