A functional sofa mechanical stretching device with a zero-wall-touch function

Abstract

The present application relates to a mechanical stretching device for a functional sofa with a zero-wall-adjacent function, belonging to the technical field of functional sofas, and includes an iron frame, a seat frame, a driving component, and a force-applying mechanism. The force-applying mechanism includes: a back plug-in member, which is rotatably arranged on the seat frame through a support member and an adjusting member and is used for installing a backrest; a connecting member, which is rotatably arranged on the iron frame; and a force-applying component, which is arranged on the seat frame and is rotatably connected to the connecting member and is used for driving the backrest to move. The present application avoids the position of the backrest through the rotation space, thereby reducing the probability of collision between the backrest and the wall. Thus, the sofa can be installed against the wall when installed, improving the space utilization rate of the sofa, enhancing the stability of the sofa, and improving the use experience of the sofa.

Description

Technical Field

[0001] The present application relates to the technical field of functional sofas, and in particular to a mechanical stretching device for a functional sofa with a zero-wall-touching function. Background Art

[0002] Currently, in order to improve people's usage experience, multifunctional sofas generally include three different states: sitting position, TV position, and lying position.

[0003] Existing sofas generally include a seat frame movably arranged on an iron frame and a backrest movably arranged on the seat frame. A driving component for the movement of the seat frame and the backrest is also arranged on the iron frame. When the driving component is activated, the seat frame tilts downward, causing the sofa to switch from the sitting position to the TV position. Then, when the driving component is activated continuously, the seat frame continues to tilt upward, causing the backrest to rotate downward and be laid down, thereby realizing the conversion from the TV position to the lying position.

[0004] When the seat frame moves upward, it will drive the backrest to rotate. Therefore, when the seat frame moves downward, it will also drive the backrest to rotate at a certain angle. Generally, the rotation point of the backrest is located at the bottom end of the backrest and the backrest is relatively high. Therefore, the top end of the backrest is likely to rotate outside the sofa and collide with the wall during the rotation process. Therefore, when placing the multifunctional sofa, it will be placed away from the wall to avoid the backrest, reducing the space utilization rate of the sofa. At the same time, it also makes the sofa not touch the wall for positioning after installation, thereby reducing the stability of the sofa and thus reducing the usage experience of the sofa. Summary of the Invention

[0005] In order to improve the usage experience of the sofa, the present application provides a mechanical stretching device for a functional sofa with a zero-wall-touching function.

[0006] A mechanical stretching device for a functional sofa with a zero-wall-touching function provided by the present application adopts the following technical solutions:

[0007] A mechanical stretching device for a functional sofa with a zero-wall-touching function includes an iron frame, a seat frame movably connected to the iron frame, and a driving component arranged on the iron frame and used to drive the movement of the seat frame. A force-applying mechanism for driving the movement of the backrest is arranged on the seat frame. The force-applying mechanism includes:

[0008] A backrest insert, which is rotatably arranged on the seat frame through a support member and an adjusting member and is used for installing the backrest;

[0009] A connecting member, which is rotatably arranged on the iron frame;

[0010] A force-applying component, which is arranged on the seat frame and is rotatably connected to the connecting member and is used to drive the movement of the backrest.

[0011] By adopting the above technical solution, the seat frame, the support member, the adjusting member and the back plug-in cooperate to form a structure similar to a four-bar linkage to support the back plug-in. At the same time, the force-applying component positions the backrest, and the force-applying component is used to drive the backrest to move;

[0012] When switching from the sitting position to the TV position, the driving component starts to drive the seat frame to tilt downward and move away from the wall. The movement of the seat frame also drives the structures and the backrest on the seat frame to tilt downward and move away from the wall at the same time. As a result, a relative rotation occurs between the force-applying component and the connecting member, and the force-applying component moves away from the wall and drives the connecting member to rotate relative to the iron frame to avoid interference, so that the force-applying component does not rotate. Therefore, the backrest does not rotate but only moves away from the wall, so as to form a rotation space with the wall, thereby realizing the conversion from the sitting position to the TV position.

[0013] When switching from the TV position to the lying position, the connecting member has rotated to the limit position. The driving component continues to start and drives the seat frame to tilt upward and move away from the wall side. Therefore, the components and the backrest on the seat frame tilt upward and move away from the wall side. The force-applying component tilts upward and rotates under the pull of the connecting member. The rotation of the force-applying component drives the backrest to rotate to realize reclining, thereby realizing the conversion from the TV position to the lying position. Therefore, the backrest is avoided from interference through the rotation space, thereby reducing the probability of the backrest colliding with the wall. Thus, the sofa can be installed against the wall when installing the sofa, improving the space utilization rate of the sofa, and at the same time improving the stability of the sofa, thereby improving the use experience of the sofa. At the same time, the backrest is driven to move by the rotating structure, reducing the probability of failure of using the sliding structure. Therefore, the stability of the sofa is further improved, and the use experience of the sofa is improved.

[0014] Optionally, the force-applying component includes:

[0015] A force-applying plate, which is rotatably arranged on the seat frame through a rotating shaft and is rotatably connected to the connecting member through a rotating column;

[0016] A force-applying member, which is rotatably arranged on the force-applying plate through a rotating rod and is rotatably connected to the back plug-in through a rotating rod.

[0017] By adopting the above technical solution, after the connecting member rotates to the limit position and does not continue to rotate, the force-applying plate rotates under the pull of the connecting member, and the rotation of the force-applying plate drives the back plug-in to rotate through the force-applying member, so as to realize reclining the backrest.

[0018] Optionally, a limiting component for limiting the sofa in the sitting position and the lying position is arranged on the back plug-in and the force-applying plate. The limiting component includes:

[0019] The first limiting post and the second limiting post, the first limiting post is arranged on the back plug-in part, the second limiting post is arranged on the force application plate and is located between the back plug-in part and the seat frame, and the first limiting post and the second limiting post are respectively located on both sides of the support member; when the sofa is in the sitting position, the first limiting post and the second limiting post respectively press against the support member and the back plug-in part for positioning, and when the sofa is in the lying position, the first limiting post and the second limiting post respectively press against the support member and the seat frame for positioning.

[0020] By adopting the above technical solution, the first limiting post and the second limiting post respectively press against the support member and the back plug-in part for positioning. When the sofa is converted from the sitting position to the lying position, the adjusting member rotates to drive the back plug-in part and the first limiting post to rotate upward and away from the support member, and the first limiting post rotates around the hinge joint between the support member and the back plug-in part. At the same time, the force application plate drives the second limiting post to rotate downward away from the back plug-in part and close to the seat frame. When converted to the lying position, the first limiting post rotates to the other side of the hinge joint between the support member and the back plug-in part. Therefore, the first limiting post presses against the support member, and the second limiting post presses against the seat frame, so as to limit the sofa in the sitting position and the lying position.

[0021] Optionally, the rotating shaft divides the force application plate into a first linkage part and a second linkage part. The first linkage part and the second linkage part are respectively rotationally connected to the force application member and the connecting member, and the length of the second linkage part is greater than the length of the connecting member.

[0022] Optionally, the adjusting member is located on the side of the support member away from the wall surface, and the force application assembly includes:

[0023] A first linkage plate, which is rotationally arranged on the seat frame and is rotationally connected to the connecting member;

[0024] A first pushing plate, the two ends of which are respectively rotationally connected to the adjusting member and the first linkage plate.

[0025] By adopting the above technical solution, the connecting member pulls the first linkage plate to rotate, and the rotation of the first linkage plate drives the adjusting member to rotate through the first pushing plate. The rotation of the adjusting member pulls the back plug-in part to rotate, so as to realize the reclining of the backrest;

[0026] The adjusting member is located on the side of the support member away from the wall surface. Therefore, when the first pushing plate is hinged to the support member, the first pushing plate is likely to collide with the adjusting member when rotating. Therefore, the first pushing plate will form a bending part for avoiding the position, and the bending part will reduce the strength of the first pushing plate and also increase the production cost; and the movement of the seat frame will pull the adjusting member to rotate away from the support member, and the first pushing plate is hinged to the adjusting member, so that the first pushing plate will not touch the support member when pulling the adjusting member to rotate, so that the first pushing plate does not need to form a bending part for avoiding the position, improving the stability of the sofa and at the same time reducing the production cost of the sofa.

[0027] Optionally, the adjusting member is disposed on the seat frame and is provided with an arc-shaped slideway, and a sliding member that slides on the slideway is disposed on the back plug-in member.

[0028] By adopting the above technical solution, the slideway guides the movement of the back plug-in member, so that the back plug-in member moves more stably, can move along the designed movement track, improves the stability of the sofa, and improves the use experience of the sofa.

[0029] Optionally, the force application assembly includes:

[0030] A second linkage plate, which is rotatably disposed on the seat frame and is rotatably connected to the connecting member;

[0031] A second push plate, both ends of which are respectively rotatably connected to the back plug-in member and the second linkage plate, and the hinge points of the second push plate and the support member with the back plug-in member coincide.

[0032] By adopting the above technical solution, the connecting member pulls the second linkage plate to rotate, and the rotation of the second linkage plate drives the back plug-in member to rotate through the second push plate, so as to realize the reclining of the backrest; at the same time, when the second push plate pulls the back plug-in member to rotate, it also pulls the support member to rotate. The hinge points of the second push plate and the support member with the back plug-in member coincide, thereby further improving the synchronism of the movement among the second push plate, the back plug-in member and the support member, and improving the use experience of the sofa.

[0033] Optionally, the force application assembly includes:

[0034] A third linkage plate, which is rotatably disposed on the seat frame and is rotatably connected to the connecting member;

[0035] A third push plate, both ends of which are respectively rotatably connected to the sliding member and the third linkage plate.

[0036] By adopting the above technical solution, the connecting member pulls the third linkage plate to rotate, and the rotation of the third linkage plate drives the sliding member to move through the third push plate. When the sliding member moves, it rotates under the action of the slideway, thereby driving the back plug-in member to rotate to realize the reclining of the backrest; moreover, the acting force of the third push plate directly acts on the movement point of the back plug-in member, thereby reducing the loss of force and the energy consumption during the pushing movement.

[0037] Optionally, positioning columns are disposed on both the support member and the second linkage plate. When the sofa is in a lying posture, the two positioning columns are both pressed against the seat frame for positioning.

[0038] By adopting the above technical solution, during the process of the sofa being converted into a lying position, the support member and the second linkage plate rotate to drive the positioning column to rotate downward, so that the positioning column presses against the seat frame for positioning, thereby realizing the positioning of the position of the backrest, improving the stability of the sofa during operation, and improving the use experience of the sofa.

[0039] Optionally, the sliding member is a roller that rolls on the slideway.

[0040] By adopting the above technical solution, the friction between the sliding member and the slideway is reduced, the probability of wear of the sliding member is reduced, thereby improving the stability of the sliding member during operation, and at the same time reducing the probability of noise caused by damage to the sliding member.

[0041] In summary, the present application includes at least one of the following beneficial technical effects:

[0042] By using the rotation space to avoid the backrest, the probability of collision between the backrest and the wall is reduced, so that the sofa can be installed against the wall during installation, improving the space utilization rate of the sofa, improving the stability of the sofa, and improving the use experience of the sofa. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic structural diagram of the sofa in the sitting position in Embodiment 1 of the present application;

[0044] Figure 2 is a schematic structural diagram of the sofa in the TV position in Embodiment 1 of the present application;

[0045] Figure 3 is a schematic structural diagram of the limiting component of the sofa in the lying position in Embodiment 1 of the present application;

[0046] Figure 4 is a schematic structural diagram of the sofa in the lying position in Embodiment 1 of the present application;

[0047] Figure 5 is a schematic structural diagram of the limiting component of the sofa in the sitting position in Embodiment 1 of the present application;

[0048] Figure 6 is a schematic structural diagram of the force-applying component of the sofa in the sitting position in Embodiment 2 of the present application;

[0049] Figure 7 is a schematic structural diagram of the force-applying component of the sofa in the lying position in Embodiment 2 of the present application;

[0050] Figure 8 is a schematic structural diagram of the force-applying component of the sofa in the sitting position in Embodiment 3 of the present application;

[0051] Figure 9It is a schematic structural diagram of the force application component when the sofa is in a lying position in the third embodiment of the present application, mainly showing the positioning column;

[0052] Figure 10 It is a schematic structural diagram of the force application component when the sofa is in a lying position in the third embodiment of the present application;

[0053] Figure 11 It is a schematic structural diagram of the force application component when the sofa is in a sitting position in the fourth embodiment of the present application;

[0054] Figure 12 It is a schematic structural diagram of the force application component when the sofa is in a lying position in the fourth embodiment of the present application.

[0055] Reference numerals: 1, iron frame; 11, seat frame; 13, bearing plate; 14, rotating shaft; 2, force application mechanism; 21, support member; 22, adjusting member; 23, back plug-in member; 24, first mounting portion; 25, second mounting portion; 26, connecting member; 27, slideway; 28, sliding member; 29, mounting column; 3, force application component; 32, force application plate; 33, force application member; 331, bent portion; 34, first linkage portion; 341, rotating rod; 35, second linkage portion; 351, rotating column; 36, rotating rod; 4, drive component; 5, limiting component; 51, first limiting column; 52, second limiting column; 53, first limiting groove; 54, second limiting groove; 61, first linkage plate; 62, first pushing plate; 71, second linkage plate; 72, second pushing plate; 81, third linkage plate; 82, third pushing plate; 9, positioning column. Detailed implementation manners

[0056] The following further elaborates on the present application in conjunction with the attached Figures 1 - 12 to make a more detailed description of the present application.

[0057] The embodiment of the present application discloses a functional sofa mechanical stretching device with a zero-wall-adjacent function.

[0058] Embodiment 1

[0059] Referring to Figure 1 , the functional sofa mechanical stretching device with a zero-wall-adjacent function includes an iron frame 1, a backrest that abuts against the wall surface, a seat frame 11 movably connected to the iron frame 1, a drive component 4 provided on the iron frame 1 for driving the movement of the seat frame 11, and a force application mechanism 2 provided on the seat frame 11 for driving the movement of the backrest.

[0060] Referring to Figure 1, the driving assembly 4 includes a driving seat and an electric push rod. The driving seat is rotatably arranged on the iron frame 1 and is located on the side of the seat frame 11 close to the wall; the electric push rod is fixedly installed on the driving seat, and the piston rod of the electric push rod is connected to the seat frame 11 and is used to drive the seat frame 11 to move. At the same time, when changing from the sitting position to the TV position, the seat frame 11 tilts downward and moves away from the wall, and when changing from the TV position to the lying position, the seat frame 11 tilts upward and moves away from the wall.

[0061] Refer to Figure 1 , the force application mechanism 2 includes a back plug-in 23. A bearing plate 13 is fixedly installed on the upper surface of one end of the seat frame 11 close to the wall. The back plug-in 23 is rotatably installed on the bearing plate 13 through a support member 21 and an adjusting member 22. The bottom ends of the support member 21 and the adjusting member 22 are both rotatably installed on the bearing plate 13, and the hinge point of the adjusting member 22 and the bearing plate 13 is located below the hinge point of the support member 21 and the bearing plate 13. At the same time, the top ends of the support member 21 and the adjusting member 22 extend above the bearing plate 13. The top end of the support member 21 is located above the adjusting member 22, and the support member 21 is located on the side of the adjusting member 22 close to the wall.

[0062] Refer to Figure 1 and Figure 2 , a rotating shaft is fixedly installed at the top end of the support member 21. The bottom end of the back plug-in 23 is rotatably installed on the top end of the adjusting member 22, and the back plug-in 23 is arranged obliquely upward and is rotatably connected to the rotating shaft. At the same time, the top end of the back plug-in 23 extends above the support member 21. The support member 21 and the adjusting member 22 are respectively located on opposite sides of the back plug-in 23; the rotating shaft divides the back plug-in 23 into a first installation part 24 and a second installation part 25. The bottom end of the second installation part 25 is rotatably connected to the adjusting member 22, and the length of the second installation part 25 is less than the length of the first installation part 24. The first installation part 24 is used to install the backrest; the support member 21, the adjusting member 22 and the back plug-in 23 cooperate to form a quadrilateral structure and the axes of the rotation directions are all parallel.

[0063] Refer to Figure 1 and Figure 3 , the force application mechanism 2 further includes a connecting member 26 and a force application assembly 3. One end of the connecting member 26 is rotatably installed on the iron frame 1 and is located directly below the bearing plate 13. At the same time, the other end of the connecting member 26 is arranged obliquely upward and faces away from the wall side.

[0064] Refer to Figure 1 and Figure 4, the force - applying component 3 is arranged on the seat frame 11 and is rotatably connected to the connecting piece 26. The force - applying component 3 is used to drive the backrest to move. The force - applying component 3 includes a force - applying plate 32 and a force - applying member 33. A rotating shaft 14 is fixedly installed on the side wall of the bearing plate 13 and on the side of the support member 21 close to the wall. The force - applying plate 32 is rotatably installed on the rotating shaft 14. The rotating shaft 14 divides the force - applying plate 32 into a first linkage portion 34 and a second linkage portion 35. One end of the first linkage portion 34 away from the rotating shaft 14 extends obliquely upward to the side of the backrest insert 23 away from the wall and is fixedly installed with a rotating rod 341. One end of the second linkage portion 35 away from the rotating shaft 14 extends obliquely downward to the side close to the iron frame 1 and is fixedly installed with a rotating column 351. Therefore, both the rotating rod 341 and the rotating column 351 are located on the side of the rotating shaft 14 away from the wall.

[0065] Refer to Figure 1 , Figure 2 and Figure 4 , one end of the force - applying member 33 is rotatably installed on the rotating rod 341. The force - applying member 33 is located between the force - applying plate 32 and the backrest insert 23. The other end of the force - applying member 33 is rotatably connected to the second mounting portion 25 through a rotating rod 36. The rotating rod 36 and the adjusting member 22 are on the same side of the backrest insert 23.

[0066] Refer to Figure 1 and Figure 4 , one end of the force - applying member 33 away from the rotating rod 36 is provided with a bent portion 331 formed by stamping and bending. The bent portion 331 is away from the backrest insert 23 and is used to avoid the adjusting member 22 during rotation, reducing the probability of collision between the force - applying member 33 and the adjusting member 22 during rotation. The axes of all the rotation directions of the connecting piece 26, the force - applying plate 32, the force - applying member 33, and the backrest insert 23 are parallel.

[0067] Refer to Figure 3 and Figure 5 , a limiting component 5 for limiting the sofa in the sitting and lying postures is arranged on the backrest insert 23 and the force - applying plate 32. The limiting component 5 includes a first limiting post 51 and a second limiting post 52. The first limiting post 51 is fixedly installed on the second mounting portion 25 and is located between the support member 21 and the adjusting member 22. The second limiting post 52 is fixedly installed on the first linkage portion 34 and is located between the first mounting portion 24 and the bearing plate 13. At the same time, the first limiting post 51 and the second limiting post 52 are respectively on both sides of the rotating shaft and the support member 21. When the sofa is in the sitting posture, the first limiting post 51 presses against the support member 21, and the second limiting post 52 presses against the first mounting portion 24 for positioning.

[0068] Refer to Figure 4 and Figure 5, when the sofa is in a reclined position, the first limiting post 51 presses against the support member 21, and the second limiting post 52 presses against the bearing plate 13 for positioning. At the same time, two first limiting grooves 53 that can fit with the first limiting post 51 are spaced apart on the support member 21, and a second limiting groove 54 that can fit with the second limiting post 52 is formed on the bearing plate 13. When converting from a sitting position to a reclined position, the adjusting member 22 drives the second mounting portion 25 and the first limiting post 51 to rotate upward. Therefore, the first limiting post 51 moves away from the support member 21, and the first mounting portion 24 and the backrest rotate downward. At the same time, the first linkage portion 34 rotates downward to drive the second limiting post 52 closer to the bearing plate 13. Therefore, the first limiting post 51 presses from the lower first limiting groove 53 to the upper first limiting groove 53, and the second limiting post 52 moves away from the first mounting portion 24 and presses against the second limiting groove 54, so as to limit the position of the sofa.

[0069] The working principle of the embodiment of the present application is as follows:

[0070] The electric push rod starts to drive the seat frame 11, the bearing plate 13 and the components on the bearing plate 13 to move obliquely downward and away from the wall side. Therefore, the force application plate 32 moves and pulls the top of the connecting member 26 to rotate downward for avoidance, so as to realize the movement of the seat frame 11 driving the backrest to move without rotating, so as to realize the conversion from the sitting position to the TV position, and make the backrest move away from the wall to form a rotation space.

[0071] The electric push rod continues to move to drive the seat frame 11 to move obliquely upward and away from the wall side. The connecting member 26 has rotated to the limit position and cannot rotate. Therefore, under the limitation of the connecting member 26, the force application plate 32 is pulled to rotate around the rotating shaft 14. The force application plate 32 drives the backrest plug-in member 23 to rotate through the force application member 33, so as to realize the reclining of the backrest, and thus realize the conversion from the TV position to the reclined position. Therefore, before adjusting to the reclined position, the backrest is driven away from the wall in advance to form a rotation space, thereby reducing the probability of collision between the backrest and the wall, so as to improve the use experience of the sofa.

[0072] Embodiment 2

[0073] Refer to Figure 1 and Figure 6 , the difference between this embodiment and Embodiment 1 is that the force application assembly 3 includes a first linkage plate 61 and a first pushing plate 62.

[0074] Refer to Figure 6 and Figure 7, the first linkage plate 61 is rotatably mounted on the rotating shaft 14, and the top end of the first linkage plate 61 is inclined upward and the bottom end is inclined downward, and both ends of the first linkage plate 61 are inclined toward the side close to the adjusting member 22; the bottom end of the first linkage plate 61 is rotatably connected to the top end of the connecting member 26, one end of the first push plate 62 is rotatably mounted on the top end of the first linkage plate 61, and the other end of the first push plate 62 extends to the adjusting member 22 and is rotatably connected to the adjusting member 22. At the same time, the hinge point between the first push plate 62 and the adjusting member 22 is located between the hinge points of the adjusting member 22 with the bearing plate 13 and the back plug-in member 23.

[0075] Refer to Figure 1 , Figure 6 , after the seat frame 11 moves and the connecting member 26 rotates to the limit position, the connecting member 26 pulls the bottom end of the first linkage plate 61 upward and the top end downward to rotate, and the downward rotation of the top end of the first linkage plate 61 pulls the adjusting member 22 to rotate through the first push plate 62. The adjusting member 22 rotates and pulls the back plug-in member 23 and the support member 21 to rotate simultaneously, so as to realize the rotation of the backrest and the reclining of the backrest. Moreover, the first push plate 62 is located on the side of the support member 21 and the adjusting member 22 away from the wall surface. During the process of the backrest moving away from the wall surface, the first push plate 62 will not collide with the support member 21 when rotating. Therefore, there is no need to provide an avoidance structure for the first push plate 62, which improves the strength of the first push plate 62. Therefore, the use experience of the sofa is improved, and at the same time, the production cost of the sofa is reduced.

[0076] The working principle of the embodiment of the present application is as follows:

[0077] The connecting member 26 pulls the first linkage plate 61 to rotate, and the rotation of the first linkage plate 61 pulls the back plug-in member 23 and the support member 21 to rotate simultaneously through the first push plate 62, so as to realize the rotation of the backrest and the reclining of the backrest. Moreover, the first push plate 62 will not collide with the support member 21. Therefore, there is no need to provide an avoidance structure for the first push plate 62. Therefore, the use experience of the sofa is improved, and at the same time, the production cost of the sofa is reduced.

[0078] Embodiment 3

[0079] Refer to Figure 8 , the difference between this embodiment and Embodiment 1 is that one end of the adjusting member 22 is fixedly mounted on the bearing plate 13, and an arc-shaped slideway 27 is provided on the adjusting member 22; the force application assembly 3 includes a second linkage plate 71 and a second push plate 72.

[0080] Refer to Figure 8 and Figure 9, a sliding member 28 slidably mounted on a slideway 27 is provided on the back plug-in 23. The sliding member 28 can be a roller or a slider. Hereinafter, the roller will be taken as an example for explanation. A horizontal mounting post 29 is fixedly installed at the bottom end of the back plug-in 23, and the roller is rotatably mounted on the mounting post 29 and rolls on the slideway 27 for positioning. At the same time, the support member 21 and the adjusting member 22 are respectively located on both sides of the back plug-in 23, and the support member 21 is used to position the roller to prevent the roller from disengaging from the slideway 27.

[0081] Refer to Figure 8 and Figure 10 , the second linkage plate 71 is rotatably mounted on the rotating shaft 14, and the top end of the second linkage plate 71 is inclined upward and the bottom end is inclined downward. Both ends of the second linkage plate 71 are inclined toward the side close to the adjusting member 22; the bottom end of the second linkage plate 71 is rotatably connected to the top end of the connecting member 26, and one end of the second push plate 72 is rotatably mounted on the top end of the second linkage plate 71, and the other end of the second push plate 72 extends to the rotating shaft and is rotatably connected to the rotating shaft, so that the hinge points of the second push plate 72 and the support member 21 with the back plug-in 23 coincide, and at the same time, the second linkage plate 71 and the second push plate 72 are both located on the side of the support member 21 away from the back plug-in 23.

[0082] Refer to Figure 1 , Figure 8 , after the seat frame 11 moves and the connecting member 26 rotates to the limit position, the connecting member 26 pulls the bottom end of the second linkage plate 71 upward and the top end downward to rotate, and the downward rotation of the top end of the second linkage plate 71 pulls the back plug-in 23 and the support member 21 to rotate simultaneously through the second push plate 72. At the same time, when the back plug-in 23 rotates, it pushes the roller to roll on the slideway 27, so as to realize the movement of the back plug-in 23 and the backrest along the designed path, improve the stability of the backrest during operation, and improve the use experience of the sofa; moreover, the second push plate 72 and the adjusting member 22 are located on both sides of the back plug-in 23, so they will not collide with the adjusting member 22 during rotation. Therefore, there is no need to provide an avoidance structure for the second push plate 72, which improves the strength of the second push plate 72, thus improving the use experience of the sofa and reducing the production cost of the sofa at the same time.

[0083] Refer to Figure 8 , Figure 9 , horizontal positioning posts 9 are fixedly installed on the side walls of the second linkage plate 71 and the second push plate 72 close to the bearing plate 13. When the sofa is converted to the lying position, both positioning posts 9 are pressed against the upper surface of the support plate for positioning. At the same time, two fitting grooves fitting the positioning posts 9 are formed on the bearing plate 13; when the sofa is converted from the lying position to the TV position, the second linkage plate 71 and the second push plate 72 drive the two positioning posts 9 to rotate upward and away from the bearing plate 13, thereby unlocking the second linkage plate 71 and the second push plate 72.

[0084] The working principle of the embodiment of the present application is as follows:

[0085] The connecting member 26 pulls the second linkage plate 71 to rotate. The rotation of the second linkage plate 71 drives the back plug-in member 23 and the support member 21 to rotate simultaneously through the second pushing plate 72, so as to realize the rotation of the backrest and the reclining of the backrest. At the same time, the back plug-in member 23 drives the roller to roll on the slideway 27 for support, so as to realize the movement of the backrest along the designed path, improve the stability of the backrest during operation, and improve the use experience of the sofa.

[0086] Embodiment 4

[0087] Refer to Figure 8 and Figure 11 In this embodiment, the difference from Embodiment 3 is that the force application assembly 3 includes a third linkage plate 81 and a third pushing plate 82. The third linkage plate 81 is rotatably installed on the rotating shaft 14, and the top end of the third linkage plate 81 is inclined upward and the bottom end is inclined downward. Both ends of the third linkage plate 81 are inclined toward the side close to the adjusting member 22; one end of the mounting post 29 away from the roller passes through the back plug-in member 23.

[0088] Refer to Figure 11 and Figure 12 The bottom end of the third linkage plate 81 is rotatably connected to the top end of the connecting member 26. One end of the third pushing plate 82 is rotatably installed on the top end of the third linkage plate 81, and the other end of the third pushing plate 82 is rotatably connected to the end of the mounting post 29 outside the back plug-in member 23. At the same time, both the third linkage plate 81 and the third pushing plate 82 are located on the side of the back plug-in member 23 away from the adjusting member 22; at the same time, positioning posts 9 for positioning are also fixedly installed on the third linkage plate 81 and the support member 21.

[0089] Refer to Figure 1 and Figure 11 When the seat frame 11 moves and the connecting member 26 rotates to the limit position, the connecting member 26 pulls the bottom end of the third linkage plate 81 upward and the top end downward to rotate. The downward rotation of the top end of the third linkage plate 81 drives the roller to roll on the slideway 27 through the third pushing plate 82, and the back plug-in member 23 rotates and moves under the restriction of the support member 21, so that the back plug-in member 23 and the support member 21 rotate and move simultaneously, so as to realize the movement of the back plug-in member 23 and the backrest along the designed path, improve the stability of the backrest during operation, and improve the use experience of the sofa.

[0090] The working principle of the embodiment of the present application is as follows:

[0091] The connecting member 26 pulls the third linkage plate 81 to rotate. The rotation of the third linkage plate 81 pulls the back plug-in member 23 and the support member 21 to rotate simultaneously through the third pushing plate 82, so as to realize the rotation of the backrest and recline the backrest. At the same time, the back plug-in member 23 drives the rollers to roll and support on the slideway 27, so as to realize the movement of the backrest along the designed path, improve the stability of the backrest during operation, and improve the use experience of the sofa.

[0092] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A mechanical stretching device for a functional sofa with a zero-wall-touch function, comprising an iron frame (1), a seat frame (11) movably connected to the iron frame (1), and a driving assembly (4) arranged on the iron frame (1) and used to drive the movement of the seat frame (11). Characterized in that: A force application mechanism (2) for driving the movement of the backrest is arranged on the seat frame (11), and the force application mechanism (2) includes: A backrest plug-in (23), which is rotatably arranged on the seat frame (11) through a support member (21) and an adjusting member (22) and is used to install the backrest; A connecting member (26), which is rotatably arranged on the iron frame (1); A force application assembly (3), which is arranged on the seat frame (11) and is rotatably connected to the connecting member (26) and is used to drive the movement of the backrest; The force application assembly (3) includes: a force application plate (32), which is rotatably arranged on the seat frame (11) through a rotating shaft (14) and is rotatably connected to the connecting member (26) through a rotating column (351); A force application member (33), which is rotatably arranged on the force application plate (32) through a rotating rod (341) and is rotatably connected to the backrest plug-in (23) through a rotating rod (36).

2. A mechanical stretching device for a functional sofa with a zero-wall-touch function according to claim 1, Characterized in that: A limiting assembly (5) for limiting the sofa in the sitting and lying postures is arranged on the backrest plug-in (23) and the force application plate (32), and the limiting assembly (5) includes: a first limiting column (51) and a second limiting column (52). The first limiting column (51) is arranged on the backrest plug-in (23), the second limiting column (52) is arranged on the force application plate (32) and is located between the backrest plug-in (23) and the seat frame (11), and the first limiting column (51) and the second limiting column (52) are respectively located on both sides of the support member (21); when the sofa is in the sitting posture, the first limiting column (51) and the second limiting column (52) respectively press against the support member (21) and the backrest plug-in (23) for positioning, and when the sofa is in the lying posture, the first limiting column (51) and the second limiting column (52) respectively press against the support member (21) and the seat frame (11) for positioning.

3. A mechanical stretching device for a functional sofa with a zero-wall-touch function according to claim 2, Characterized in that: The rotating shaft (14) divides the force application plate (32) into a first linkage part (34) and a second linkage part (35). The first linkage part (34) and the second linkage part (35) are respectively rotatably connected to the force application member (33) and the connecting member (26), and the length of the second linkage part (35) is greater than the length of the connecting member (26).

4. A mechanical stretching device for a functional sofa with a zero-wall-touch function, comprising an iron frame (1), a seat frame (11) movably connected to the iron frame (1), and a driving assembly (4) arranged on the iron frame (1) and used to drive the movement of the seat frame (11). Characterized in that: A force application mechanism (2) for driving the movement of the backrest is arranged on the seat frame (11), and the force application mechanism (2) includes: Rear plug-in part (23), the rear plug-in part (23) is rotatably arranged on the seat frame (11) through a support part (21) and an adjusting part (22) and is used for installing a backrest; Connecting part (26), the connecting part (26) is rotatably arranged on the iron frame (1); Force application assembly (3), the force application assembly (3) is arranged on the seat frame (11) and is rotatably connected to the connecting part (26) and is used for driving the backrest to move; The adjusting part (22) is located on the side of the support part (21) away from the wall surface, and the force application assembly (3) includes: First linkage plate (61), the first linkage plate (61) is rotatably arranged on the seat frame (11) and is rotatably connected to the connecting part (26); First push plate (62), both ends of the first push plate (62) are rotatably connected to the adjusting part (22) and the first linkage plate (61) respectively.

5. A mechanical stretching device for a functional sofa with a zero-wall-touch function, including an iron frame (1), a seat frame (11) movably connected to the iron frame (1), and a driving assembly (4) arranged on the iron frame (1) and used for driving the seat frame (11) to move, characterized in that: A force application mechanism (2) for driving the backrest to move is arranged on the seat frame (11), and the force application mechanism (2) includes: Rear plug-in part (23), the rear plug-in part (23) is rotatably arranged on the seat frame (11) through a support part (21) and an adjusting part (22) and is used for installing a backrest; Connecting part (26), the connecting part (26) is rotatably arranged on the iron frame (1); Force application assembly (3), the force application assembly (3) is arranged on the seat frame (11) and is rotatably connected to the connecting part (26) and is used for driving the backrest to move; The adjusting part (22) is arranged on the seat frame (11) and is provided with an arc-shaped slideway (27), and a sliding part (28) sliding on the slideway (27) is arranged on the rear plug-in part (23); The force application assembly (3) includes: Second linkage plate (71), the second linkage plate (71) is rotatably arranged on the seat frame (11) and is rotatably connected to the connecting part (26); Second push plate (72), both ends of the second push plate (72) are rotatably connected to the rear plug-in part (23) and the second linkage plate (71) respectively, and the hinge points of the second push plate (72) and the support part (21) with the rear plug-in part (23) coincide.

6. A mechanical stretching device for a functional sofa with a zero-wall-touch function according to claim 5, characterized in that: Positioning columns (9) are arranged on both the support part (21) and the second linkage plate (71). When the sofa is in a lying position, the two positioning columns (9) are both pressed against the seat frame (11) for positioning.

7. A mechanical stretching device for a functional sofa with a zero-wall-touch function according to claim 5, characterized in that: The sliding part (28) is a roller rolling on the slideway (27).

8. A mechanical stretching device for a functional sofa with a zero-wall-touch function, including an iron frame (1), a seat frame (11) movably connected to the iron frame (1), and a driving assembly (4) arranged on the iron frame (1) and used for driving the seat frame (11) to move, characterized in that: A force application mechanism (2) for driving the backrest to move is provided on the seat frame (11), and the force application mechanism (2) includes: A backrest insert (23), which is rotatably arranged on the seat frame (11) through a support member (21) and an adjusting member (22) and is used for installing the backrest; A connecting member (26), which is rotatably arranged on the iron frame (1); A force application assembly (3), which is arranged on the seat frame (11) and is rotatably connected to the connecting member (26) and is used for driving the backrest to move; The adjusting member (22) is arranged on the seat frame (11) and is provided with an arc-shaped slideway (27), and a sliding member (28) that slides on the slideway (27) is arranged on the backrest insert (23); The force application assembly (3) includes: A third linkage plate (81), which is rotatably arranged on the seat frame (11) and is rotatably connected to the connecting member (26); A third pushing plate (82), both ends of which are rotatably connected to the sliding member (28) and the third linkage plate (81) respectively.

9. The mechanical stretching device of a functional sofa with a zero-wall-adjacent function according to claim 8, characterized in that: The sliding member (28) is a roller that rolls on the slideway (27).

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