Sofa frame without leaning against wall and sofa

Abstract

The invention discloses a zero-wall-leaning sofa frame and a sofa, and relates to the technical field of sofas, and the zero-wall-leaning sofa frame comprises a bottom frame, a seat frame, a backrest assembly, a leg support assembly, a driving assembly and a linkage assembly. The leg support assembly is driven to be unfolded through a telescopic cylinder and a rotating rod of the driving assembly, cooperative action of the backrest assembly and the leg support assembly is achieved through the linkage assembly, and therefore adjustment from a sitting posture to a TV posture and then to a lying posture is completed, the bottom frame adopts the design that a supporting plate and a connecting beam are combined, the linkage assembly comprises a plurality of connecting rods matched with sliding blocks, and stable transition is ensured. In addition, an elastic piece and a limiting piece are additionally arranged to improve stability and comfort. The effects of being compact in structure and convenient to operate are achieved, meanwhile, space is effectively saved, and user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sofas, and particularly to a zero-wall-adjacent sofa frame and a sofa. Background Art

[0002] As a common furniture product, a sofa not only meets people's daily rest needs but also plays an important role in enhancing the comfort of home life. With the continuous improvement of modern people's requirements for the quality of life, especially in the pursuit of a healthy lifestyle, functional sofas have gradually become a market hot spot. Such sofas can meet people's usage needs in various scenarios, such as normal sitting postures, TV postures when watching TV, or lying postures when completely relaxed, greatly improving the user experience and quality of life.

[0003] Sofas are relatively large in volume and are generally placed against the wall. When the sofas in the related art are placed against the wall, a certain distance is reserved in advance between the sofa and the wall to prevent interference between the sofa backrest and the wall when the sofa is adjusted from a sitting posture to a more relaxed state, such as a TV posture or a full lying posture. In this way, multi-posture sofas will occupy a large amount of usable space indoors, restricting the further popularization and development of such products.

[0004] Therefore, there is an urgent need to develop a sofa frame and a sofa that can be placed against the wall with zero distance. Summary of the Invention

[0005] In order to help solve the technical problem of the backrest occupying extra space distance during posture adjustment, the present application provides a zero-wall-adjacent sofa frame and a sofa.

[0006] In a first aspect, the present application provides a zero-wall-adjacent sofa frame, adopting the following technical solution: A zero-wall-adjacent sofa frame includes a bottom frame, a seat frame movably installed on the bottom frame, two backrest assemblies installed at one end of the seat frame, two leg rest assemblies installed at the end of the seat frame far from the backrest assemblies, a driving assembly for driving the two leg rest assemblies to move relative to the bottom frame, and a linkage assembly connecting the bottom frame and the seat frame. The backrest assemblies are connected to the bottom frame, the leg rest assemblies and the backrest assemblies are connected through the linkage assembly. The driving assembly includes a telescopic cylinder and a rotating rod. The two ends of the rotating rod are respectively fixedly connected to the leg rest assemblies on both sides of the seat frame. One end of the telescopic cylinder is hinged to the bottom frame, and the other end is hinged to the rotating rod. When the telescopic rod of the telescopic cylinder extends, it pushes the rotating rod to drive the leg rest assemblies to unfold and drives the linkage assembly to move towards the direction of the leg rest assemblies, so that the leg rest assemblies and the backrest assemblies are sequentially adjusted from a sitting posture to a TV posture and a lying posture.

[0007] By adopting the above technical solution, the driving component drives two leg rest components to move relative to the bottom frame, causing the leg rest components to perform an unfolding movement forward. After the leg rest components are fully unfolded, they drive the linkage component and the seat frame to move forward. The seat frame drives the backrest component to move forward and rotate backward under the restriction of the bottom frame, so that the backrest component is adjusted from a sitting position to a TV position and a lying position. During the adjustment of the posture, the backrest component never exceeds the end of the bottom frame away from the leg rest component, that is, the bottom frame is always in the zero-wall-adjacent position, significantly improving the convenience and comfort for users to adjust the sofa posture.

[0008] Optionally, the bottom frame includes two spaced-apart support plates, a first connecting beam, and a second connecting beam. The two ends of the first connecting beam are respectively fixedly connected to one ends of the two support plates close to the backrest component. The second connecting beam is spaced from the first connecting beam. The two ends of the second connecting beam are respectively fixedly connected to the inner side walls of the two support plates close to the bottom. First chutes and second chutes are arranged side by side and spaced apart on the opposite inner side walls of the two support plates. The first chutes and the second chutes are inclined such that the height gradually increases from the direction of the backrest component towards the leg rest component.

[0009] By adopting the above technical solution, the bottom frame is composed of two support plates, a first connecting beam, and a second connecting beam, forming a stable frame structure. The first connecting beam and the second connecting beam are respectively fixedly connected to the support plates, enhancing the load-bearing capacity and stability of the entire sofa frame. At the same time, first chutes and second chutes are provided on the inner side walls of the two support plates and are inclined such that the height gradually increases along the direction from the backrest component to the leg rest component, which can guide the lifting and translation movement trajectories of the linkage component during the switching of different postures, ensuring that the backrest component, the seat frame, and the leg rest component move smoothly and smoothly during the entire adjustment process. This design not only realizes the flexible conversion of multiple sitting angles but also ensures the maximization of the user experience comfort. Optionally, the linkage component includes a leg rest linkage rod, a sliding link, a first linkage rod, and a second linkage rod. One end of the sliding link is rotatably provided with a first slider that is slidably connected to the first chute. The end of the sliding link away from the first slider is hinged to one end of the second linkage rod. The end of the second linkage rod away from the sliding link is hinged to the seat frame. A second slider that is slidably connected to the second chute is also rotatably provided at the end of the sliding link close to the second linkage rod. One end of the first linkage rod is hinged to the end of the sliding link close to the first slider. The other end of the first linkage rod is hinged to the seat frame. One end of the leg rest linkage rod is connected to the leg rest component, and the other end is hinged to the second linkage rod.

[0010] By adopting the above technical solution, the seat frame and the sliding link are connected by the first linkage link and the second linkage link. When the seat frame moves, the sliding link is driven to move. The sliding link is slidably connected to the first sliding groove through the first slider and the second slider and the second sliding groove, so that the sliding link slides smoothly under the guidance of the first sliding groove and the second sliding groove during the attitude conversion process. The second linkage link and the leg rest assembly are connected by a leg rest linkage rod, which helps the leg rest assembly to be retracted under the seat frame in the sitting position and the leg rest assembly to be in the unfolded state in the lying position.

[0011] Optionally, the linkage assembly further includes an elastic member connecting the sliding link and the backrest assembly.

[0012] By adopting the above technical solution, when the zero-wall sofa frame is converted from the sitting position to the lying position, under the action of the elastic member, the forward unfolding of the backrest assembly is restricted, so that the leg rest assembly is preferentially unfolded to reach the TV posture until the lying position, ensuring a reasonable sequence of sofa posture conversion; when the zero-wall sofa frame is converted from the lying position to the sitting position, the elastic member assists the backrest assembly to contract preferentially, so as to reach the TV posture until the sitting position, ensuring a reasonable sequence of sofa posture conversion.

[0013] Optionally, a seat frame limiting member for restricting the rotation of the seat frame relative to the second linkage link is provided on the seat frame. When the seat frame is in the TV posture or the lying posture, the seat frame limiting member abuts against the second linkage link.

[0014] By adopting the above technical solution, the seat frame limiting member can effectively restrict the rotation of the seat frame relative to the second linkage link. When the seat frame is in the TV posture or the lying posture, the seat frame limiting member abuts against the second linkage link, thereby preventing the seat frame from rotating unexpectedly and improving the stability and reliability of the seat frame to support the human body in the TV posture or the lying posture.

[0015] Optionally, the leg rest assembly includes a first leg rest link, a second leg rest link, a third leg rest link, a fourth leg rest link and a support assembly. The first leg rest link is hinged to the seat frame. One end of the first leg rest link is hinged to the leg rest linkage rod. The other end of the first leg rest link is hinged to one end of the second leg rest link. The second leg rest link is hinged to the third leg rest link. The end of the second leg rest link far from the first leg rest link is hinged to the support assembly. One end of the third leg rest link is hinged to the seat frame and the other end is hinged to the fourth leg rest link. The end of the fourth leg rest link far from the third leg rest link is connected to the support assembly. Both ends of the rotating rod are fixedly connected to the third leg rest links located on both sides of the seat frame.

[0016] By adopting the above technical solution, the leg rest assembly is composed of multiple linkages and a support assembly, forming a multi-degree-of-freedom linkage structure. The first leg rest linkage is hinged to the seat frame and connected to the entire system through the leg rest linkage rod, ensuring that the leg rest can be easily extended and retracted; the second leg rest linkage, the third leg rest linkage, and the fourth leg rest linkage are sequentially hinged and connected, and finally firmly connected with the help of the support assembly. This design can ensure the uniform transmission of force and the improvement of stability during various posture conversions. At the same time, the design method of fixedly connecting the rotating rod to the third leg rest linkage further enhances the coordination and consistency of the overall structure, ensuring the comfort experience and safety of the user during use. Therefore, this design solution effectively achieves the performance goals of flexible adjustment and stability of the leg rest part. Optionally, the support assembly includes a first leg rest support, a second leg rest support, and a third leg rest support. The first leg rest support is hinged to the fourth leg rest linkage, and a first support part is provided at one end of the first leg rest support away from the fourth leg rest linkage. One end of the first support part is hinged to the end of the second leg rest linkage away from the first leg rest linkage, and the other end of the first support part is hinged to one end of the third leg rest support. The end of the third leg rest support away from the first support part is hinged to the second leg rest support. A second support part is provided at one end of the second leg rest support, and the end of the second leg rest support away from the second support part is hinged to the end of the fourth leg rest linkage away from the third leg rest linkage.

[0017] By adopting the above technical solution, the first leg rest support, the second leg rest support, and the third leg rest support together form a stable triangular support structure, which can effectively disperse the pressure exerted by the human leg. Among them, the first leg rest support is hinged to the fourth leg rest linkage and connected to the second leg rest linkage and the third leg rest support through the first support part respectively, realizing the reliable support for the second leg rest linkage; the third leg rest support and the second leg rest support further strengthen the stability of the overall structure. At the same time, the second leg rest support enhances the rigidity of the entire support assembly through the second support part, ensuring that the leg rest assembly supports the human leg smoothly and comfortably during different posture conversions.

[0018] Optionally, the leg rest assembly further includes a leg rest limit member for restricting the relative rotation of the third leg rest linkage with respect to the second leg rest linkage. The leg rest limit member is provided between the two hinge points of the second leg rest linkage where the second leg rest linkage is respectively connected to the first leg rest linkage and the third leg rest linkage.

[0019] By adopting the above technical solution, when the leg rest assembly is in the sitting position, TV position, and lying position, the leg rest limiting member can effectively limit the rotation of the third leg rest link relative to the second leg rest link. Specifically, in the sitting position, the leg rest limiting member prevents the leg rest assembly from over-contracting and ensures that it docks at a suitable position; in the TV position and lying position, the leg rest limiting member ensures that the leg rest assembly maintains a stable form, improving the reliability and stability of the support for the human leg. Optionally, the backrest assembly includes a backrest member, a first backrest link, a second backrest link, and a backrest linkage rod. The first backrest link is hinged to the seat frame. The backrest member includes a connecting portion and a plugging portion. One end of the connecting portion is hinged to a free end of the first backrest link. The end of the connecting portion away from the first backrest link is hinged to one end of the second backrest link. The end of the second backrest link away from the connecting portion is hinged to the seat frame. One end of the backrest linkage rod is hinged to the bottom frame, and the other end is hinged to the free end of the first backrest link away from the connecting portion. The backrest linkage rod is connected to the end of the elastic member away from the sliding link.

[0020] By adopting the above technical solution, the backrest assembly can achieve smooth switching among multiple postures. Specifically, the first backrest link is hinged to the seat frame, enabling the backrest assembly to change its angle as the seat frame moves; the backrest member consists of a connecting portion and a plugging portion, which not only enhances the structural strength but also facilitates assembly and maintenance; the hinged design of the second backrest link to the seat frame ensures the stability of the backrest in different postures; one end of the backrest linkage rod is hinged to the bottom frame, and the other end is hinged to the first backrest link. This design can effectively transmit torque under the action of the driving component. The backrest linkage rod is connected to the sliding link through the elastic member. When in the lying position, the elastic member is in the maximum stretched state. When switching from the lying position to the TV position, with the assistance of the tensile force of the elastic member, it helps the backrest assembly to first fold up, ensuring a smooth transition of the backrest assembly among the lying position, TV position, and sitting position. Generally, this design significantly improves the user experience and comfort. Optionally, the backrest assembly further includes a first backrest limiting member and a second backrest limiting member. The first backrest limiting member is disposed at one end of the connecting portion close to the first backrest link, and the second backrest limiting member is disposed at one end of the second backrest link close to the connecting portion.

[0021] By adopting the above technical solution, when the backrest assembly is in the sitting position and TV position, the first backrest limiting member can effectively limit the excessive rotation of the first backrest link relative to the connecting portion, ensuring the stability of the backrest in these two postures and improving the user experience; when the backrest assembly switches to the lying position, the second backrest limiting member comes into play, preventing the unexpected rotation of the connecting portion relative to the second backrest link, further ensuring the stability of the backrest in the lying position and enhancing the sense of security and comfort when the human body leans on it.

[0022] In a second aspect, the present application provides a zero-wall-adjacent sofa, adopting the following technical solution: A zero-wall-adjacent sofa includes the above-mentioned zero-wall-adjacent sofa frame, a sofa backrest installed on the backrest member, a sofa seat board installed on the seat frame, a first leg rest board installed on the first leg rest support, and a second leg rest board installed on the second leg rest support.

[0023] By adopting the above technical solution, while the driving component drives the rotating rod to move through the telescopic cylinder and rotates at the same time, the leg rest component makes an unfolding movement forward, so that the first leg rest board and the second leg rest board are in a horizontal state, facilitating the user to place the legs. The leg rest component drives the linkage component to move forward. As the leg rest component unfolds, the linkage component drives the sofa seat board, the backrest component and the sofa backrest to be adjusted forward synchronously to the TV position and the lying position, which helps the sofa frame to always be in the zero-wall-adjacent position in the three postures, significantly improving the convenience and comfort of the user to adjust the sofa posture.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The driving component drives the leg rest component to unfold through the telescopic cylinder and the rotating rod, and drives the seat frame and the linkage component to move, so that the backrest component and the leg rest component are sequentially adjusted from the sitting position to the TV position and the lying position. During the whole process, the backrest component does not exceed the end of the bottom frame away from the leg rest component, realizing the zero-wall-adjacent design, and significantly improving the convenience and comfort of the user to adjust the sofa posture; 2. The sliding link in the linkage component is slidably connected to the first sliding groove through the first slider and to the second sliding groove through the second slider, and can realize smooth lifting and translation movements when switching between different postures, ensuring the smooth and stable actions of the backrest component, the seat frame and the leg rest component; 3. The elastic member connects the sliding link and the backrest component, effectively restricting or assisting the unfolding and contraction of the backrest component during the posture conversion process, ensuring the rationality of the sofa posture conversion sequence, and further improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the top view of the lying posture of a zero-wall-adjacent sofa frame disclosed in the present application.

[0026] Figure 2 It is a schematic structural diagram of the bottom view of the lying posture of a zero-wall-adjacent sofa frame disclosed in the present application.

[0027] Figure 3 It is along Figure 1 The sectional view taken along line A-A in

[0028] Figure 4 It is a side view of the lying posture state of a zero-wall-adjacent sofa frame disclosed in the present application.

[0029] Figure 5 This is a schematic structural diagram of a zero-wall - leaning sofa frame in the TV posture state disclosed in the present application.

[0030] Figure 6 This is a schematic structural diagram of a zero-wall - leaning sofa frame in the sitting posture state disclosed in the present application.

[0031] Figure 7 This is a schematic structural diagram of a zero-wall - leaning sofa in the TV posture state disclosed in the present application.

[0032] Explanation of reference numerals: 1. Bottom frame; 11. Support plate; 12. First connecting beam; 13. Second connecting beam; 14. First sliding groove; 15. Second sliding groove; 2. Seat frame; 21. Seat frame limiting member; 3. Backrest assembly; 31. Backrest member; 311. Connecting portion; 3111. First backrest limiting member; 312. Insertion portion; 32. First backrest connecting rod; 33. Second backrest connecting rod; 331. Second backrest limiting member; 34. Backrest linkage rod; 4. Leg rest assembly; 41. First leg rest connecting rod; 42. Second leg rest connecting rod; 421. Leg rest limiting member; 43. Third leg rest connecting rod; 44. Fourth leg rest connecting rod; 45. Support assembly; 451. First leg rest support; 4511. First support portion; 452. Second leg rest support; 4521. Second support portion; 453. Third leg rest support; 5. Driving assembly; 51. Telescopic cylinder; 52. Rotating rod; 6. Linkage assembly; 61. Leg rest linkage rod; 62. Sliding connecting rod; 621. First slider; 622. Second slider; 63. First linkage connecting rod; 64. Second linkage connecting rod; 65. Elastic member; 101. Sofa backrest; 102. Sofa seat board; 103. First leg rest board; 104. Second leg rest board. Detailed implementation manners

[0033] The following will further describe the present application in detail in conjunction with Figures 1 to 7 to make a further detailed description of the present application.

[0034] The embodiment of the present application discloses a zero-wall - leaning sofa frame.

[0035] A zero-wall - leaning sofa frame. Refer to Figure 1 and Figure 2, including a bottom frame 1, a seat frame 2, two backrest assemblies 3, two leg rest assemblies 4, two linkage assemblies 6 and a drive assembly 5. The seat frame 2 is movably mounted on the bottom frame 1 through the linkage assembly 6. One backrest assembly 3 is mounted on each side at one end of the seat frame 2, and the backrest assembly 3 is connected to the bottom frame 1 at the same time. Two leg rest assemblies 4 are respectively mounted on both sides at the end of the seat frame 2 away from the backrest assembly 3. Both ends of the drive assembly 5 are respectively connected to the leg rest assembly 4 and the bottom frame 1. The leg rest assembly 4 and the backrest assembly 3 are connected through the linkage assembly 6. The drive assembly 5 includes a telescopic cylinder 51 and a rotating rod 52. In the embodiment of the present application, the telescopic cylinder 51 can be an electric cylinder, a hydraulic cylinder or a pneumatic cylinder. Both ends of the rotating rod 52 are fixedly connected to the leg rest assemblies 4 located on both sides of the seat frame 2. One end of the telescopic cylinder 51 is hinged to the bottom frame 1, and the other end is hinged to the rotating rod 52. In the embodiment of the present application, two support plates are provided on the bottom frame 1, a pin shaft is provided on the support plate, an ear plate is provided on the telescopic cylinder 51, and the pin shaft is rotatably connected to the ear plate. The other end of the telescopic cylinder 51 is hinged to the rotating rod 52, and its specific connection structure is the same as the connection structure of the bottom frame 1. When the telescopic rod of the telescopic cylinder 51 extends, it pushes the rotating rod 52 to rotate while moving. The rotating rod 52 drives the leg rest assembly 4 to unfold and drives the seat frame 2 and the linkage assembly 6 to move towards the direction of the leg rest assembly 4, so that the leg rest assembly 4 and the backrest assembly 3 are sequentially adjusted from the sitting position to the TV position and the lying position.

[0036] It should be noted that the three postures of the posture adjustment in the zero-wall-adjacent sofa frame of the present application are the sitting position, the TV position and the lying position. When in the sitting position, the leg rest assembly 4 is in a contracted state, and the included angle between the backrest member 31 of the backrest assembly 3 and the seat frame 2 is the smallest. When in the TV position, the leg rest assembly 4 is in an unfolded state, and the included angle between the backrest member 31 and the seat frame 2 remains unchanged. When in the lying position, the leg rest assembly 4 is in an unfolded state, and the included angle between the backrest member 31 of the backrest assembly 3 and the seat frame 2 becomes the largest, so that the backrest assembly 3 is in a reclined state. Zero-wall-adjacent means that the end of the bottom frame 1 away from the leg rest assembly 4 is the wall-adjacent end. The boundary of the backrest assembly 3 away from the leg rest assembly 4 does not exceed the wall-adjacent end of the bottom frame 1 during the conversion of the three postures, which is the zero-wall-adjacent effect of the sofa frame. Specifically, the drive assembly 5 drives the two leg rest assemblies 4 to move relative to the bottom frame 1, so that the leg rest assembly 4 makes an unfolding movement forward. After the leg rest assembly 4 is fully unfolded, it drives the linkage assembly 6 and the seat frame 2 to move forward. The seat frame 2 drives the backrest assembly 3 to move forward and rotate backward under the restriction of the bottom frame 1, so that the backrest assembly 3 is adjusted from the sitting position to the TV position and the lying position. During the adjustment of the posture, the backrest assembly 3 never exceeds the end of the bottom frame 1 away from the leg rest assembly 4, that is, the bottom frame 1 is always in the zero-wall-adjacent position, which significantly improves the convenience and comfort of the user to adjust the sofa posture.

[0037] Refer to Figure 1 and Figure 2, the bottom frame 1 includes two spaced support plates 11, a first connecting beam 12 and a second connecting beam 13. The two ends of the first connecting beam 12 are respectively fixedly connected to one ends of the two support plates 11 close to the backrest assembly 3. The second connecting beam 13 is spaced from the first connecting beam 12. The two ends of the second connecting beam 13 are respectively fixedly connected to the inner side walls of the two support plates 11 close to the bottom. The opposite inner side walls of the two support plates 11 are both provided with a first sliding groove 14 and a second sliding groove 15 side by side at intervals. The first sliding groove 14 and the second sliding groove 15 are inclined so that their heights gradually increase from the backrest assembly 3 towards the leg rest assembly 4. The bottom frame 1 is composed of two support plates 11, a first connecting beam 12 and a second connecting beam 13, forming a stable frame structure. The first connecting beam 12 and the second connecting beam 13 are respectively fixedly connected to the support plates 11, enhancing the load-bearing capacity and stability of the entire sofa frame. At the same time, the first sliding groove 14 and the second sliding groove 15 are provided on the inner side walls of the two support plates 11 and are inclined so that their heights gradually increase along the direction from the backrest assembly 3 to the leg rest assembly 4, which can guide the movement track of the linkage assembly 6 during the switching of different postures, ensuring that the backrest assembly 3, the seat frame 2 and the leg rest assembly 4 move smoothly and smoothly during the entire adjustment process. This design not only realizes the flexible conversion of multiple sitting postures, but also ensures the maximization of the user experience comfort.

[0038] Refer to Figure 3, the linkage assembly 6 includes a leg rest linkage rod 61, a sliding linkage rod 62, a first linkage rod 63 and a second linkage rod 64. One end of the sliding linkage rod 62 is rotatably provided with a first slider 621 slidably connected to the first chute 14. One end of the sliding linkage rod 62 away from the first slider 621 is hinged to one end of the second linkage rod 64. One end of the second linkage rod 64 away from the sliding linkage rod 62 is hinged to the seat frame 2. One end of the sliding linkage rod 62 close to the second linkage rod 64 is also rotatably provided with a second slider 622 slidably connected to the second chute 15. One end of the first linkage rod 63 is hinged to one end of the sliding linkage rod 62 close to the first slider 621. The other end of the first linkage rod 63 is hinged to the seat frame 2. One end of the leg rest linkage rod 61 is connected to the leg rest assembly 4, and the other end is hinged to the second linkage rod 64. It should be noted that each hinge point is provided with a hinge hole on two hinge parts, and a hinge shaft is installed in the hinge hole. The seat frame 2 and the sliding linkage rod 62 are connected by the first linkage rod 63 and the second linkage rod 64. When the seat frame 2 moves, it drives the sliding linkage rod 62 to move. The sliding linkage rod 62 makes smooth sliding under the guidance of the first chute 14 and the second chute 15 during the attitude conversion process through the sliding connection of the first slider 621 with the first chute 14 and the sliding connection of the second slider 622 with the second chute 15. The second linkage rod 64 and the leg rest assembly 4 are connected by the leg rest linkage rod 61, which helps the leg rest assembly 4 to be retracted under the seat frame 2 in the sitting position and makes the leg rest assembly 4 in the unfolded state in the lying position. The linkage assembly 6 further includes an elastic member 65 connecting the sliding linkage rod 62 and the backrest assembly 3. When the zero-wall sofa frame is converted from the sitting position to the lying position, under the action of the elastic member 65, the forward unfolding of the backrest assembly 3 is restricted, so as to preferentially unfold the leg rest assembly 4 until the lying position is reached, ensuring a reasonable sequence of sofa attitude conversion, and at the same time making the elastic member 65 in the maximum stretched state. When the zero-wall sofa frame is converted from the lying position to the sitting position, the elastic member 65 helps the backrest assembly 3 to contract preferentially, so as to reach the TV position until the sitting position, ensuring a reasonable sequence of sofa attitude conversion.

[0039] Refer to Figure 4 , a seat frame limiting member 21 for restricting the rotation of the seat frame 2 relative to the second linkage rod 64 is provided on the seat frame 2. When the seat frame 2 is in the TV position or the lying position, the seat frame limiting member 21 abuts against the second linkage rod 64. The seat frame limiting member 21 can effectively restrict the rotation of the seat frame 2 relative to the second linkage rod 64. In the embodiment of the present application, the seat frame limiting member 21 is a limiting pin shaft, which is fixed on the seat frame plate by welding. When the seat frame 2 is in the TV position or the lying position, the seat frame limiting member 21 abuts against the second linkage rod 64, so as to prevent the seat frame 2 from rotating unexpectedly, and improve the stability and reliability of the seat frame 2 in supporting the human body in the TV position or the lying position.

[0040] Refer to Figure 3, the leg rest assembly 4 includes a first leg rest link 41, a second leg rest link 42, a third leg rest link 43, a fourth leg rest link 44 and a support assembly 45. The first leg rest link 41 is hinged to the seat frame 2. One end of the first leg rest link 41 is hinged to the leg rest linkage rod 61. The other end of the first leg rest link 41 is hinged to one end of the second leg rest link 42. The second leg rest link 42 is hinged to the third leg rest link 43. The end of the second leg rest link 42 away from the first leg rest link 41 is hinged to the support assembly 45. One end of the third leg rest link 43 is hinged to the seat frame 2 and the other end is hinged to the fourth leg rest link 44. The end of the fourth leg rest link 44 away from the third leg rest link 43 is connected to the support assembly 45. Both ends of the rotating rod 52 are fixedly connected to the third leg rest links 43 located on both sides of the seat frame 2. The leg rest assembly 4 is composed of multiple links and the support assembly 45, forming a linkage structure with multiple degrees of freedom. The first leg rest link 41 is hinged to the seat frame 2 and connected to the entire system through the leg rest linkage rod 61, ensuring that the leg rest can be unfolded and retracted freely; the second leg rest link 42, the third leg rest link 43 and the fourth leg rest link 44 are hinged and connected in sequence and finally firmly connected with the help of the support assembly 45. This design can ensure the uniform transmission of force and the improvement of stability during various posture conversions. At the same time, the design method of fixedly connecting the rotating rod 52 with the third leg rest link 43 further enhances the coordination and consistency of the overall structure, ensuring the comfort experience and safety of the user during use. Therefore, this design scheme effectively achieves the performance goal of flexible adjustment and stability of the leg rest part.

[0041] Refer to Figure 3, the support assembly 45 includes a first leg support 451, a second leg support 452, and a third leg support 453. The first leg support 451 is hinged to the fourth leg link 44. One end of the first leg support 451 away from the fourth leg link 44 is provided with a first support portion 4511. One end of the first support portion 4511 is hinged to one end of the second leg link 42 away from the first leg link 41. The other end of the first support portion 4511 is hinged to one end of the third leg support 453. One end of the third leg support 453 away from the first support portion 4511 is hinged to the second leg support 452. One end of the second leg support 452 is provided with a second support portion 4521. One end of the second leg support 452 away from the second support portion 4521 is hinged to one end of the fourth leg link 44 away from the third leg link 43. The first leg support 451, the second leg support 452, and the third leg support 453 together form a stable triangular support structure, which can effectively disperse the pressure exerted by the human leg. Among them, the first leg support 451 is hinged to the fourth leg link 44 and is connected to the second leg link 42 and the third leg support 453 respectively through the first support portion 4511, realizing reliable support for the second leg link 42; the third leg support 453 and the second leg support 452 further strengthen the stability of the overall structure. At the same time, the second leg support 452 enhances the rigidity of the entire support assembly 45 through the second support portion 4521, ensuring that the leg rest assembly 4 supports the human leg smoothly and comfortably during the switching of different postures.

[0042] Referring to Figure 5 and Figure 6 , the leg rest assembly 4 further includes a leg rest limiting member 421 for restricting the rotation of the third leg link 43 relative to the second leg link 42. In the embodiment of the present application, the leg rest limiting member 421 is also a limiting pin shaft, which is fixed to the second leg link 42 by welding. The leg rest limiting member 421 is arranged between the hinge points where the second leg link 42 is connected to the first leg link 41 and the third leg link 43 respectively. When the leg rest assembly 4 is in the sitting position, TV position, and lying position, the leg rest limiting member 421 can effectively restrict the rotation of the third leg link 43 relative to the second leg link 42. Specifically, in the sitting position, the leg rest limiting member 421 prevents the leg rest assembly 4 from over-contracting and ensures that it docks at a suitable position; in the TV position and lying position, the leg rest limiting member 421 ensures that the leg rest assembly 4 maintains a stable shape and improves the reliability and stability of the human leg support. Referring to Figure 3, the backrest assembly 3 includes a backrest member 31, a first backrest link 32, a second backrest link 33, and a backrest linkage rod 34. The first backrest link 32 is hinged to the seat frame 2. The backrest member 31 includes a connecting portion 311 and a plugging portion 312. One end of the connecting portion 311 is hinged to a free end of the first backrest link 32. The end of the connecting portion 311 away from the first backrest link 32 is hinged to one end of the second backrest link 33. The end of the second backrest link 33 away from the connecting portion 311 is hinged to the seat frame 2. One end of the backrest linkage rod 34 is hinged to the bottom frame 1, and the other end is hinged to the free end of the first backrest link 32 away from the connecting portion 311. The backrest linkage rod 34 is connected to the end of the elastic member 65 away from the sliding link 62. The backrest assembly 3 can achieve smooth switching of multiple postures. The first backrest link 32 is hinged to the seat frame 2, so that the backrest assembly 3 can change the angle with the movement of the seat frame 2; the backrest member 31 is composed of the connecting portion 311 and the plugging portion 312, which not only enhances the structural strength but also facilitates assembly and maintenance; the hinged design of the second backrest link 33 and the seat frame 2 ensures the stability of the backrest in different postures; one end of the backrest linkage rod 34 is hinged to the bottom frame 1 and the other end is hinged to the first backrest link 32. This design can effectively transmit the torque under the action of the driving assembly 5. The backrest linkage rod 34 is connected to the sliding link 62 through the elastic member 65. In the embodiment of the present application, the elastic member 65 is a tension spring. Hanging shafts are respectively provided on the backrest linkage rod 34 and the sliding link 62, and the two ends of the tension spring are respectively hung on the hanging shafts. In other embodiments of the present application, the elastic member 65 is an elastic rubber tube or an elastic rubber band, and the two ends of the elastic rubber tube or the elastic rubber band are respectively fixedly installed on the backrest linkage rod 34 and the sliding link 62. In the lying posture, the elastic member 65 is in the maximum stretched state. When converting from the lying posture to the TV posture, with the assistance of the tensile force of the elastic member 65, it helps to make the backrest assembly 3 retract first, ensuring the smooth conversion of the backrest assembly 3 among the lying posture, the TV posture, and the sitting posture. Generally, this design significantly improves the user experience and comfort.

[0043] Refer to Figure 5 and Figure 6, the backrest assembly 3 further includes a first backrest limiting member 3111 and a second backrest limiting member 331. The first backrest limiting member 3111 is disposed at one end of the connecting portion 311 close to the first backrest link 32, and the second backrest limiting member 331 is disposed at one end of the second backrest link 33 close to the connecting portion 311. In the embodiment of the present application, both the first backrest limiting member 3111 and the second backrest limiting member 331 are limiting pin shafts, and are respectively fixed to the connecting portion 311 and the second backrest limiting member 331 by welding. When the backrest assembly 3 is in the sitting position and the TV position, the first backrest limiting member 3111 can effectively limit the excessive rotation of the first backrest link 32 relative to the connecting portion 311, ensuring the stability of the backrest in these two postures and improving the user experience; when the backrest assembly 3 is switched to the lying position, the second backrest limiting member 331 plays a role in preventing the unexpected rotation of the connecting portion 311 relative to the second backrest link 33, further ensuring the stability of the backrest in the lying position and enhancing the sense of security and comfort when the human body leans on it.

[0044] The implementation principle of a zero-wall-adjacent sofa frame in an embodiment of the present application is as follows: The initial state is a sitting position state. In the sitting position state, the leg rest assembly 4 is retracted below the seat frame 2. The leg rest limiting member 421 abuts against one end of the third leg rest link 43 close to the fourth leg rest link 44. The first backrest limiting member 3111 abuts against the first backrest link 32. The included angle between the insertion portion 312 of the backrest member 31 and the upper surface of the seat frame 2 is set as an obtuse angle, so that in the sitting position state, the use experience of the seat frame 2 and the backrest assembly 3 is more comfortable. Start the telescopic cylinder 51 to work. While its telescopic rod extends and pushes the rotating rod 52 to move and rotate at the same time, it drives the first leg rest link 41 and the second leg rest link 42 to rotate in a direction away from the backrest assembly 3. The third leg rest link 43 and the fourth leg rest link 44 rotate accordingly. Due to the limitation of the hinge connection of the first leg rest support 451, the second leg rest support 452, and the third leg rest support 453, the leg rest assembly 4 retracted below the seat frame 2 gradually unfolds. When the leg rest assembly 4 is fully unfolded, the leg rest limiting member 421 abuts against the side of the third leg rest link 43 away from the fourth leg rest link 44 at the hinge point of the third leg rest link 43 and the second leg rest link 42. The seat frame limiting member 21 abuts against the second linkage link 64, which is the TV position state. The telescopic rod of the telescopic cylinder 51 continues to extend, pushing the leg rest assembly 4 to continue to move, driving the linkage assembly 6 to move from one end close to the backrest assembly 3 to one end close to the leg rest assembly 4 along the first chute 14 and the second chute 15. The first slider 621 and the second slider 622 connected to the sliding link 62 are respectively guided by the first chute 14 and the second chute 15. Driven by the linkage assembly 6, the seat frame 2 pulls the first backrest link 32 and the second backrest link 33, causing the backrest member 31 and the backrest linkage rod 34 to rotate accordingly. Due to the drive of the first backrest link 32 and the second backrest link 33 at both ends of the backrest member 31, its insertion portion 312 rotates towards one end away from the leg rest assembly 4, so that the included angle between the insertion portion 312 and the upper surface of the seat frame 2 reaches the maximum, which is the lying position state. At the same time, the sliding link 62 stretches the elastic member 65 to the maximum stretched state. One end of the bottom frame 1 away from the leg rest assembly 4 is the end adjacent to the wall. The extreme boundary on the side of the backrest assembly 3 away from the leg rest assembly 4 will not exceed the end of the bottom frame 1 adjacent to the wall during the conversion of the three postures, which is the zero-wall-adjacent effect of the sofa frame. Start the telescopic cylinder 51 to work, and its telescopic rod contracts. Under the action of the pulling force of the elastic member 65, the backrest linkage rod 34 first performs a contraction action, converting from the lying position to the TV position. The telescopic rod continues to contract, and the telescopic rod drives the rotating rod 52 to move backward and rotate to retract the leg rest assembly 4 below the seat frame 2.

[0045] An embodiment of the present application also discloses a zero-wall-adjacent sofa.

[0046] A zero-wall-adjacent sofa, referring to Figure 7, including the above zero-wall-adjacent sofa frame, the sofa backrest 101 installed on the backrest member 31, the sofa seat board 102 installed on the seat frame 2, the first leg rest board 103 installed on the first leg rest support 451, and the second leg rest board 104 installed on the second leg rest support 452. The drive assembly 5 rotates while pushing the rotating rod 52 to move through the telescopic cylinder 51, so that the leg rest assembly 4 moves forward to perform an unfolding movement, making the first leg rest board 103 and the second leg rest board 104 in a horizontal state, facilitating the user to place the legs. The leg rest assembly 4 drives the linkage assembly 6 to move forward. The linkage assembly 6 drives the sofa seat board 102, the backrest assembly 3 and the sofa backrest 101 to be adjusted forward synchronously to the TV position and the lying position as the leg rest assembly 4 unfolds, which helps the sofa frame to always be in the zero-wall-adjacent position in the three postures, significantly improving the convenience and comfort of the user to adjust the sofa posture.

[0047] The above are all the preferred embodiments of the present application, and do not limit the protection scope of the present application in turn. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A zero-wall sofa frame, characterized by: The invention comprises a bottom frame (1), a seat frame (2) movably mounted on the bottom frame (1), two backrest assemblies (3) mounted at one end of the seat frame (2), two leg support assemblies (4) mounted at one end of the seat frame (2) away from the backrest assemblies (3), a driving assembly (5) for driving the two leg support assemblies (4) to move relative to the bottom frame (1), and a linkage assembly (6) connecting the bottom frame (1) and the seat frame (2), wherein the backrest assembly (3) is connected to the bottom frame (1), the leg support assembly (4) and the backrest assembly (3) are connected via the linkage assembly (6), and the driving assembly (5) is used to drive the two leg support assemblies (4) to move relative to the bottom frame (1). The movable assembly (5) comprises a telescopic cylinder (51) and a rotating rod (52), the two ends of the rotating rod (52) are respectively fixedly connected to the leg support assembly (4) located on both sides of the seat frame (2), one end of the telescopic cylinder (51) is hinged to the bottom frame (1), and the other end is hinged to the rotating rod (52); when the telescopic rod of the telescopic cylinder (51) is extended, the rotating rod (52) is pushed to drive the leg support assembly (4) to unfold, and drive the linkage assembly (6) to move towards the leg support assembly (4), so that the leg support assembly (4) and the backrest assembly (3) are adjusted from a sitting position to a TV position and a lying position respectively.

2. The zero-wall sofa frame according to claim 1, characterized in that: The bottom frame (1) comprises two support plates (11) arranged at intervals, a first connecting beam (12) and a second connecting beam (13), the two ends of the first connecting beam (12) are respectively fixedly connected to one end of the two support plates (11) close to the backrest assembly (3), the second connecting beam (13) is arranged at intervals from the first connecting beam (12), the two ends of the second connecting beam (13) are respectively fixedly connected to the inner side walls of the two support plates (11) close to the bottom, the inner side walls opposite to each other of the two support plates (11) are both provided with a first slide groove (14) and a second slide groove (15) spaced side by side, the first slide groove (14) and the second slide groove (15) are inclinedly arranged with a height gradually increasing from the backrest assembly (3) toward the leg support assembly (4).

3. The zero-wall sofa frame according to claim 2, characterized in that: The linkage assembly (6) comprises a leg support linkage rod (61), a sliding link (62), a first linkage link (63) and a second linkage link (64); one end of the sliding link (62) is rotatably provided with a first slider (621) slidably connected to the first slide groove (14); one end of the sliding link (62) away from the first slider (621) is hinged to one end of the second linkage link (64); and one end of the second linkage link (64) away from the sliding link (62) is hinged to the seat frame (2). One end of the sliding link (62) close to the second linkage link (64) is also rotatably provided with a second slider (622) slidably connected to the second slide groove (15); one end of the first linkage link (63) is hinged to one end of the sliding link (62) close to the first slider (621); the other end of the first linkage link (63) is hinged to the seat frame (2); one end of the leg support linkage link (61) is connected to the leg support assembly (4), and the other end is hinged to the second linkage link (64).

4. The zero-wall sofa frame according to claim 3, characterized in that: The linkage assembly (6) further comprises an elastic member (65) connecting the sliding connecting rod (62) and the backrest assembly (3).

5. The zero-wall sofa frame according to claim 4, characterized in that: The leg support assembly (4) comprises a first leg support link (41), a second leg support link (42), a third leg support link (43), a fourth leg support link (44) and a support assembly (45), wherein the first leg support link (41) is hinged to the seat frame (2), one end of the first leg support link (41) is hinged to the leg support linkage rod (61), the other end of the first leg support link (41) is hinged to one end of the second leg support link (42), the second leg support link (42) is hinged to the third leg support link (43) The second leg support link (42) is hinged at one end away from the first leg support link (41) and is hinged to the support assembly (45); one end of the third leg support link (43) is hinged to the seat frame (2), and the other end is hinged to the fourth leg support link (44); one end of the fourth leg support link (44) away from the third leg support link (43) is connected to the support assembly (45); and both ends of the rotating rod (52) are respectively fixedly connected to the third leg support link (43) located on both sides of the seat frame (2).

6. The zero-wall sofa frame according to claim 5, characterized in that: The support assembly (45) comprises a first leg support (451), a second leg support (452) and a third leg support (453); the first leg support (451) is hinged to the fourth leg support link (44); a first support portion (4511) is provided at one end of the first leg support (451) away from the fourth leg support link (44); one end of the first support portion (4511) is hinged to one end of the second leg support link (42) away from the first leg support link (41); The other end of the support portion (4511) is hinged to one end of the third leg support (453), and the end of the third leg support (453) away from the first support portion (4511) is hinged to the second leg support (452), and a second support portion (4521) is provided at one end of the second leg support (452), and the end of the second leg support (452) away from the second support portion (4521) is hinged to the end of the fourth leg support link (44) away from the third leg support link (43).

7. The zero-wall sofa frame according to claim 6, characterized in that: The leg support assembly (4) further comprises a leg support limiter (421) for limiting the rotation of the third leg support link (43) relative to the second leg support link (42); the leg support limiter (421) is arranged on the second leg support link (42) between the hinge points where the second leg support link (42) is respectively connected to the first leg support link (41) and the third leg support link (43).

8. The zero-wall sofa frame according to claim 7, characterized in that: The backrest assembly (3) comprises a backrest member (31), a first backrest connecting rod (32), a second backrest connecting rod (33) and a backrest linkage rod (34), wherein the first backrest connecting rod (32) is hinged to the seat frame (2), the backrest member (31) comprises a connecting portion (311) and a plug-in portion (312), one end of the connecting portion (311) is hinged to a free end of the first backrest connecting rod (32), and the connecting portion (311) is away from the first backrest connecting rod (3 2) is hinged to one end of the second backrest connecting rod (33), one end of the second backrest connecting rod (33) away from the connecting portion (311) is hinged to the seat frame (2), one end of the backrest linkage rod (34) is hinged to the bottom frame (1), and the other end is hinged to the free end of the first backrest connecting rod (32) away from the connecting portion (311), and the backrest linkage rod (34) is connected to one end of the elastic member (65) away from the sliding connecting rod (62).

9. The zero-wall sofa frame according to claim 8, characterized in that: The backrest assembly (3) further comprises a first backrest limiting member (3111) and a second backrest limiting member (331), wherein the first backrest limiting member (3111) is arranged at one end of the connecting portion (311) close to the first backrest connecting rod (32), and the second backrest limiting member (331) is arranged at one end of the second backrest connecting rod (33) close to the connecting portion (311).

10. A zero-wall sofa, characterized by: It comprises the zero-wall sofa frame as described in claim 8 or 9, a sofa backrest (101) installed on the backrest member (31), a sofa seat plate (102) installed on the seat frame (2), a first leg support plate (103) installed on the first leg support (451), and a second leg support plate (104) installed on the second leg support (452).

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