Sofa posture adjusting assembly and sofa

Abstract

The utility model discloses a sofa posture adjusting assembly and a sofa, and relates to the technical field of sofa manufacturing, the sofa posture adjusting assembly comprises a seat part assembly, two leg support assemblies and two backrest assemblies, the seat part assembly comprises a fixed frame, two movable frames arranged side by side and a sliding rail component, the two movable frames are slidably connected with the fixed frame through the sliding rail component, and the sofa posture adjusting assembly further comprises a driving assembly; the driving assembly comprises a driving electric cylinder and a pushing piece connected with a driving rod of the driving electric cylinder, the two ends of the pushing piece are connected with the two leg support assemblies, the driving electric cylinder is rotationally connected with the fixing frame, the assisting assembly is installed on the moving frame, one end of the assisting assembly is connected with the leg support assemblies, and the other end of the assisting assembly is connected with the backrest assembly. The posture adjusting assembly can be stretched and adjusted in sequence according to the sitting posture, the TV posture and the lying posture and can be folded and adjusted in sequence according to the lying posture, the TV posture and the sitting posture, the posture conversion action of the posture adjusting assembly is smooth, safe and reliable, and the experience feeling of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sofa manufacturing, and in particular to a sofa posture adjustment assembly. Background Art

[0002] With the improvement of living standards, sofas need to be able to adjust their posture to meet users' relaxation needs in multiple scenarios. The sofa posture adjustment assembly includes three major structures: a seat, a leg rest and a backrest that can be adjustably installed on the seat. By adjusting these three major structures, the sofa can present three postures: sitting, TV and lying. The sitting posture is a folded state, the lying posture is an extended state, and the TV posture is between the folded state and the extended state. When the posture adjustment assembly is adjusted from the folded state to the extended state, the leg rest is required to extend first and then the backrest is extended; when the posture adjustment assembly is adjusted from the extended state to the folded state, the backrest is required to fold first and then the leg rest. The above order requirements need to be met during the posture adjustment process. Disorder will affect the user experience.

[0003] The posture adjustment of the sofa in the related art is usually achieved through multiple independent electric push rods or cylinders. Although this method can provide a certain adjustment range, the adjustment process is not smooth enough, and it is easy to cause uncoordinated movements of different parts, which affects the user experience.

[0004] Therefore, how to provide a posture adjustment assembly with coordinated and smooth adjustment movements is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] In order to help solve the problem of smooth and coordinated adjustment of the posture adjustment assembly, the present application provides a sofa posture adjustment assembly and a sofa.

[0006] In a first aspect, the present application provides a sofa posture adjustment assembly, which adopts the following technical solution:

[0007] A sofa posture adjustment assembly, comprising a seat component, two leg rest components connected to the front end of the seat component, and two backrest components connected to the rear end of the seat component. The seat component includes a fixed frame, two moving frames arranged side by side, and a slide rail component. The two moving frames are slidably connected to the fixed frame through the slide rail component. It further includes a drive component for driving the two leg rest components and the two backrest components to expand or retract. The drive component includes a drive electric cylinder and a pusher connected to the drive rod of the drive electric cylinder. Both ends of the pusher are connected to the two leg rest components. The drive electric cylinder is rotatably connected to the fixed frame. It also includes an assisting component for assisting the two leg rest components to expand first or the two backrest components to retract first. The assisting component is installed on the moving frame, with one end of the assisting component connected to the leg rest component and the other end connected to the backrest component.

[0008] By adopting the above technical solution, when the posture adjustment assembly is converted from a sitting posture to a lying posture, the drive rod of the drive electric cylinder extends to push the pusher. The pusher drives the leg rest component to first perform an extension action with the assistance of the assisting component, and then pushes the moving frame to drive the backrest component to perform an extension action. When the posture adjustment assembly is converted from a lying posture to a sitting posture, the drive rod of the drive electric cylinder contracts to push the pusher. The pusher drives the leg rest component with the assistance of the assisting component. The moving frame drives the backrest component to first perform a retraction action, and then drives the leg rest component to perform a retraction action, which helps the posture adjustment assembly to extend and adjust successively according to the sitting posture, TV posture, and lying posture, and retract in the order of lying posture, TV posture, and sitting posture. The posture conversion action of the posture adjustment assembly is smooth, safe, and reliable, enhancing the user experience.

[0009] Optionally, the backrest component includes a first back link, a second back link, a third back link, and a backrest fixing plate. The first back link and the second back link are respectively rotatably connected to the moving frame. The third back link is rotatably arranged on the fixed frame. One end of the second back link is rotatably connected to the third back link, and the other end is rotatably connected to the backrest fixing plate. One end of the backrest fixing plate close to the first back link is rotatably connected to the first back link. The end of the first back link far from the backrest fixing plate is connected to the assisting component.

[0010] By adopting the above technical solution, the first back link and the second back link are rotatably installed on the moving frame. The end of the first back link far from the backrest fixing plate is connected to the assisting component. When the drive rod of the drive electric cylinder retracts, the first back link, with the assistance of the assisting component, makes the moving frame move first to make the backrest component retract first, which helps to smoothly retract in the order of lying posture, TV posture, and sitting posture.

[0011] Optionally, the second back link includes a transmission part and a support part fixedly connected to the transmission part. The transmission part and the support part form a structure that is substantially perpendicular to each other. The part where the transmission part and the support part are combined forms a joint part. The joint part is rotatably connected to the moving frame. One end of the transmission part away from the joint part is rotatably connected to the backrest fixing plate, and one end of the support part away from the joint part is rotatably connected to the third back link.

[0012] By adopting the above technical solution, the second back link is rotatably connected to the moving frame through the joint part. The transmission part is connected to the power assist component through the backrest fixing plate and the first back link, and the support part is connected to the fixed frame through the third back link. When the moving frame moves relative to the fixed frame, it helps the backrest component to extend or retract in a certain order, so that the backrest installed on the backrest fixing plate is in a lying or sitting position.

[0013] Optionally, the leg rest assembly includes a first leg link, a second leg link, a third leg link, a fourth leg link, and a leg rest mounting plate. One end of the first leg link and one end of the second leg link are respectively rotatably connected to the moving frame. The other end of the first leg link is rotatably connected to one end of the fourth leg link. The other end of the second leg link is rotatably connected to one end of the third leg link. The middle of the first leg link is rotatably connected to the middle of the third leg link. The other ends of the third leg link and the fourth leg link are respectively rotatably connected to the leg rest mounting plate; both ends of the pushing member are fixedly connected to the first leg links in two leg rest assemblies, and the middle of the second leg link is connected to the power assist component.

[0014] By adopting the above technical solution, both ends of the pushing member are fixedly connected to the first leg links in two leg rest assemblies, the middle of the second leg link is connected to the power assist component, and one end of the first leg link and one end of the second leg link are respectively rotatably connected to the moving frame. When the driving rod of the driving electric cylinder extends, the pushing member pushes the first leg link. At the same time, with the assistance of the power assist component, the second leg link helps the leg rest assembly to perform an extension action first, realizing the adjustment from a sitting position to a TV position and a lying position.

[0015] Optionally, the pushing member includes a push rod, two mounting ear plates arranged at the middle position of the push rod. There are mounting holes on the mounting ear plates, and the mounting holes are penetrated by pin shafts, and the pin shafts are rotatably connected to the driving rod of the driving electric cylinder.

[0016] By adopting the above technical solution, the pushing member is connected to the first leg link through the push rod, and is rotatably connected to the driving rod of the driving electric cylinder through the pin shafts penetrating the mounting holes on the two mounting ear plates. The driving rod pushes the mounting ear plate to rotate the push rod, and the push rod drives the first leg link to rotate, which helps to realize the retraction or extension action of the leg rest assembly.

[0017] Optionally, the boosting component includes a first boosting rod, a second boosting rod and an elastic member. The first boosting rod is rotatably arranged on the moving frame. One end of the first boosting rod is connected to one end of the elastic member, and the other end of the elastic member is connected to the first back link. The other end of the first boosting rod is rotatably connected to one end of the second boosting rod, and the other end of the second boosting rod is rotatably connected to the middle of the second leg link.

[0018] By adopting the above technical solution, the first boosting rod is rotatably arranged on the moving frame. One end of the first boosting rod is connected to one end of the elastic member, and the other end is rotatably connected to one end of the second boosting rod. The other end of the second boosting rod is rotatably connected to the middle of the second leg link. Under the action of the first boosting rod and the second boosting rod, it helps to keep the elastic member in a stretched state when the leg rest assembly is in the retracted state. When the leg rest assembly is converted from the sitting position to the lying position, the elastic member in the stretched state, with the assistance of the resilience, increases the stretching force of the leg rest assembly, which helps the leg rest assembly to perform the stretching action first. When the backrest assembly is converted from the lying position to the sitting position, the elastic member in the stretched state, with the assistance of the resilience, increases the retracting force of the backrest assembly, which helps the backrest assembly to perform the retracting action first. With the assistance of the boosting component, the posture adjustment is coordinated smoothly in sequence. Cooperating with the driving electric cylinder, it can replace the multi-power drive for attitude adjustment. The structure is simple, and the production and manufacturing cost can be effectively reduced.

[0019] Optionally, the elastic member is a tension spring or a rubber band.

[0020] By adopting the above technical solution, the elastic member is a tension spring or a rubber band, with a simple structure and reliable action, and the production and manufacturing cost can be effectively reduced.

[0021] Optionally, the slide rail component includes a first slide rail fixedly connected to the fixed frame and a second slide rail fixedly connected to the moving frame. The first slide rail and the second slide rail are slidably connected through a rolling component.

[0022] By adopting the above technical solution, the first slide rail is fixedly installed on the fixed frame, the second slide rail is fixedly installed on the moving frame, and the first slide rail and the second slide rail are slidably connected through a rolling component, which helps to improve the reliability of the sliding of the moving frame on the fixed frame.

[0023] Optionally, the first slide rail includes a bottom plate, outer plates vertically extending upward on both sides of the bottom plate, and the free ends of the outer plates are bent inward to form upper rails. The upper rails on both sides form an opening for accommodating the second slide rail, and the bottom plate is fixedly connected to the fixing frame; the second slide rail includes a top plate disposed opposite to the bottom plate, inner plates vertically extending downward on both sides of the top plate, and the free ends of the inner plates are bent outward to form lower rails, and the lower rails are arranged at intervals opposite to the upper rails; the rolling assembly includes a first rolling body, a second rolling body, and a cage for preventing the first rolling body and the second rolling body from disengaging. The first rolling body is disposed between the bottom plate and the top plate, and the second rolling body is disposed between the upper rail and the lower rail.

[0024] By adopting the above technical solution, by arranging the first rolling body between the bottom plate and the top plate, and arranging the second rolling body between the upper rail and the lower rail, and the first rolling body and the second rolling body are installed in the cage, it helps to improve the sliding stability and reliability of the first slide rail and the second slide rail.

[0025] In a second aspect, the present application provides a sofa, adopting the following technical solution:

[0026] A sofa includes a sofa posture adjustment assembly as described above, and further includes a backrest plate installed on the backrest assembly and a leg rest plate installed on the leg rest assembly.

[0027] By adopting the above technical solution, the posture adjustment assembly of the sofa adopts a design combining a driving component and an assisting component, realizing the linkage adjustment of the leg rest plate and the backrest plate of the sofa in a certain order, making the sofa posture adjustment action coordinated, smooth, safe and reliable.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The posture adjustment assembly of the sofa adopts a design combining a driving component and an assisting component, realizing the linkage adjustment of the leg rest and the backrest of the sofa in a certain order, making the sofa posture adjustment action coordinated, smooth, safe and reliable; enhancing the user experience;

[0030] 2. The first back link and the second back link are rotatably installed on the moving frame, and one end of the first back link away from the backrest fixing plate is connected to the assisting component. When the driving rod of the driving electric cylinder retracts, the first back link, with the assistance of the assisting component, moves the moving frame first to make the backrest assembly fold first, which helps to smoothly fold the lying position, TV position and sitting position in sequence;

[0031] 3. The elastic member of the assisting component, under the assistance of the resilience, helps the leg rest component to perform the stretching action first, or helps the backrest component to perform the folding action first. The attitude adjustment of the attitude adjustment assembly is coordinated and smooth. Cooperating with the driving electric cylinder, it can replace the multi-power drive to adjust the attitude, with a simple structure and can effectively reduce the production and manufacturing cost;

[0032] 4. A first rolling body is arranged between the bottom plate and the top plate, and a second rolling body is arranged between the upper track and the lower track. The first rolling body and the second rolling body are installed in the cage, which helps to improve the sliding stability and reliability of the first slide rail and the second slide rail. Description of the Drawings

[0033] Figure 1 The structural schematic diagram of a sofa attitude adjustment assembly disclosed in this application when in the sitting position.

[0034] Figure 2 The structural schematic diagram of a sofa attitude adjustment assembly disclosed in this application when in the TV position.

[0035] Figure 3 The structural schematic diagram of a sofa attitude adjustment assembly disclosed in this application when in the lying position.

[0036] Figure 4 is Figure 3 The partial enlarged view of position I in

[0037] Figure 5 is Figure 3 The partial enlarged view of position II in

[0038] Figure 6 is Figure 3 The partial enlarged view of position III in

[0039] Figure 7 is the cross-sectional view along Figure 2 A - A in

[0040] Figure 8 The structural schematic diagram of a sofa in the lying position disclosed in this application.

[0041] Explanation of the Reference Numerals:

[0042] 1. Seat assembly; 11. Fixed frame; 12. Movable frame; 13. Slide rail component; 131. First slide rail; 1311. Bottom plate; 1312. Outer side plate; 1313. Upper track; 1314. Opening; 132. Second slide rail; 1321. Top plate; 1322. Inner side plate; 1323. Lower track; 133. Rolling component; 1331. First rolling body; 1332. Second rolling body; 1333. Cage; 2. Leg rest assembly; 21. First leg connecting rod; 22. Second leg connecting rod; 23. Third leg connecting rod; 24. Fourth leg connecting rod; 25. Leg rest mounting plate; 3. Backrest assembly; 31. First back connecting rod; 32. Second back connecting rod; 321. Transmission part; 322. Support part; 323. Joint part; 33. Third back connecting rod; 34. Backrest fixing plate; 341. Mounting part; 4. Driving component; 41. Driving electric cylinder; 411. Driving rod; 42. Pushing part; 421. Push rod; 4211. Fixing plate; 422. Mounting ear plate; 4221. Mounting hole; 43. Pin shaft; 5. Boosting component; 51. First boosting rod; 52. Second boosting rod; 53. Elastic part; 101. Backrest board; 102. Leg rest board. Detailed implementation mode

[0043] The following is combined with Figures 1 to 8 to further elaborate on this application in detail.

[0044] The embodiment of this application discloses a sofa posture adjustment assembly.

[0045] A sofa posture adjustment assembly. Refer to Figures 1 to 3, including a seat component 1, two leg rest components 2 and two backrest components 3. The two leg rest components 2 are installed at the front end of the seat component 1, and the two backrest components 3 are installed at the rear end of the seat component 1. The seat component 1 includes a fixed frame 11, two moving frames 12 and a slide rail component 13. The two moving frames 12 are arranged side by side and are slidably connected to the fixed frame 11 through the slide rail component 13. It also includes a driving component 4. The driving component 4 is used to drive the two leg rest components 2 and the two backrest components 3 to expand or retract. The driving component 4 includes a driving electric cylinder 41 and a pushing member 42 connected to the driving rod 411 of the driving electric cylinder 41. Both ends of the pushing member 42 are connected to the two leg rest components 2. The driving electric cylinder 41 is rotatably connected to the fixed frame 11. It also includes an assisting component 5. The assisting component 5 is used to assist the two leg rest components 2 to expand first or the two backrest components 3 to retract first. The assisting component 5 is installed on the moving frame 12. One end of the assisting component 5 is connected to the leg rest component 2, and the other end is connected to the backrest component 3. When the posture adjustment assembly is converted from a sitting posture to a lying posture, the driving rod 411 of the driving electric cylinder 41 extends to push the pushing member 42. The pushing member 42 drives the leg rest component 2. With the assistance of the assisting component 5, the leg rest component 2 first performs an extension action, and then pushes the moving frame 12 to drive the backrest component 3 to perform an extension action. When the posture adjustment assembly is converted from a lying posture to a sitting posture, the driving rod 411 of the driving electric cylinder 41 retracts to push the pushing member 42. The pushing member 42 drives the leg rest component 2. With the assistance of the assisting component 5, the moving frame 12 drives the backrest component 3 to first perform a retraction action, and then pushes and drives the leg rest component 2 to perform a retraction action, which helps the posture adjustment assembly to extend and adjust in sequence according to the sitting posture, TV posture and lying posture, and perform retraction adjustment in the order of lying posture, TV posture and sitting posture. The posture conversion action of the posture adjustment assembly is smooth, safe and reliable, enhancing the user experience.

[0046] Refer to Figure 3 and Figure 4 , the backrest component 3 includes a first back link 31, a second back link 32, a third back link 33 and a backrest fixing plate 34. The first back link 31 and the second back link 32 are respectively rotatably connected to the moving frame 12. The third back link 33 is rotatably arranged on the fixed frame 11. One end of the second back link 32 is rotatably connected to the third back link 33, and the other end is rotatably connected to the backrest fixing plate 34. One end of the backrest fixing plate 34 close to the first back link 31 is rotatably connected to the first back link 31. The end of the first back link 31 far from the backrest fixing plate 34 is connected to the assisting component 5. The middle part of the backrest fixing plate 34 is provided with an installation part 341 for installing a sofa backrest board 101. When adjusting from a lying posture to a sitting posture, the driving rod 411 of the driving electric cylinder 41 retracts. With the assistance of the assisting component 5, the first back link 31 makes the moving frame 12 move first to make the backrest component 3 retract first, which helps to smoothly retract in sequence from the lying posture, TV posture and sitting posture.

[0047] Refer toFigure 3 and Figure 4 The second back link 32 includes a transmission part 321 and a support part 322. The support part 322 is fixedly connected to the transmission part 321. The transmission part 321 and the support part 322 form a structure that is substantially perpendicular to each other. In the embodiment of the present application, the support part 322 and the transmission part 321 are integrally formed. In other embodiments of the present application, the support part 322 and the transmission part 321 are fixed together by welding or bonding. The combined part of the transmission part 321 and the support part 322 forms a combined part 323. The combined part 323 is rotatably connected to the moving frame 12. One end of the transmission part 321 away from the combined part 323 is rotatably connected to the backrest fixing plate 34. One end of the support part 322 away from the combined part 323 is rotatably connected to the third back link 33. The second back link 32 is rotatably connected to the moving frame 12 through the combined part 323. The transmission part 321 is connected to the assist component 5 through the backrest fixing plate 34 and the first back link 31. The support part 322 is connected to the fixed frame 11 through the third back link 33. When the moving frame 12 moves relative to the fixed frame 11, it helps the backrest component 3 to extend or fold up in a certain order, so that the backrest plate 101 installed on the backrest fixing plate 34 is in a lying position or a sitting position.

[0048] Refer to Figure 3 and Figure 5 As shown in FIGS. and, the leg rest assembly 2 includes a first leg link 21, a second leg link 22, a third leg link 23, a fourth leg link 24 and a leg rest mounting plate 25. One end of the first leg link 21 and one end of the second leg link 22 are respectively rotatably connected to the moving frame 12. The other end of the first leg link 21 is rotatably connected to one end of the fourth leg link 24. The other end of the second leg link 22 is rotatably connected to one end of the third leg link 23. The middle part of the first leg link 21 is rotatably connected to the middle part of the third leg link 23. The other ends of the third leg link 23 and the fourth leg link 24 are respectively rotatably connected to the leg rest mounting plate 25. Both ends of the pushing member 42 are fixedly connected to the first leg links 21 in the two leg rest assemblies 2. The middle part of the second leg link 22 is connected to the assist component 5. When the driving rod 411 of the driving electric cylinder 41 extends, the pushing member 42 pushes the first leg link 21. At the same time, with the assistance of the assist component 5, the second leg link 22 helps the leg rest assembly 2 to perform an extension action first, realizing the adjustment from a sitting position to a TV position and a lying position.

[0049] Refer to Figure 5 and Figure 6, the pusher 42 includes a push rod 421. Two mounting lugs 422 are provided at the middle position of the push rod 421. Mounting holes 4221 are provided on the mounting lugs 422. A pin shaft 43 passes through the mounting holes 4221. The pin shaft 43 is rotatably connected to the driving rod 411 of the driving electric cylinder 41. In the embodiment of the present application, fixing plates 4211 are provided at both ends of the push rod 421. The fixing plates 4211 are respectively fixedly connected to the two first leg linkages 21 by screws. In other embodiments of the present application, both ends of the push rod 421 are directly welded to the two first leg linkages 21; the pusher 42 is connected to the first leg linkage 21 through the push rod 421, and the pin shaft 43 passes through the mounting holes 4221 on the two mounting lugs 422 and is rotatably connected to the driving rod 411 of the driving electric cylinder 41, which helps to increase the torque between the driving rod 411 and the pusher 42, so that the driving rod 411 pushes the mounting lug 422 to drive the push rod 421 to rotate, and further the push rod 421 drives the first leg linkage 21 to rotate, which helps to realize the folding or stretching action of the leg rest assembly 2.

[0050] Refer to Figure 3 , the assisting component 5 includes a first assisting rod 51, a second assisting rod 52 and an elastic member 53. The first assisting rod 51 is rotatably arranged on the moving frame 12. One end of the first assisting rod 51 is connected to one end of the elastic member 53. The other end of the elastic member 53 is connected to the first back linkage 31. The other end of the first assisting rod 51 is rotatably connected to one end of the second assisting rod 52. The other end of the second assisting rod 52 is rotatably connected to the middle of the second leg linkage 22; under the action of the first assisting rod 51 and the second assisting rod 52, it helps to make the elastic member 53 in a stretched state when the leg rest assembly 2 is in the folded state. When the leg rest assembly 2 is converted from the sitting position to the lying position, the elastic member 53 in the stretched state is assisted by the resilience force to increase the stretching force of the leg rest assembly 2, which helps the leg rest assembly 2 to perform the stretching action first. When the backrest assembly 3 is converted from the lying position to the sitting position, the elastic member 53 in the stretched state is assisted by the resilience force to increase the folding force of the backrest assembly 3, which helps the backrest assembly 3 to perform the folding action first. With the assistance of the assisting component 5, the posture adjustment is coordinated and smooth. The assisting component 5 cooperates with the driving electric cylinder 41 to act and can replace the multi-power drive to adjust the posture. The structure is simple and can effectively reduce the production and manufacturing cost; the elastic member 53 is a tension spring or a rubber band, with low manufacturing cost, simple structure and reliable action, and can effectively reduce the production and manufacturing cost.

[0051] Refer to Figure 7, the slide rail component 13 includes a first slide rail 131 and a second slide rail 132. The first slide rail 131 is fixedly connected to the fixed frame 11 by fastening screws, and the second slide rail 132 is fixedly connected to the moving frame 12 by fastening screws. The first slide rail 131 and the second slide rail 132 are slidably connected by a rolling component 133, which helps to improve the reliability of the sliding of the moving frame 12 on the fixed frame 11. The first slide rail 131 includes a bottom plate 1311, outer side plates 1312 vertically extending upward on both sides of the bottom plate 1311. The free ends of the outer side plates 1312 are bent inward to form upper tracks 1313. The upper tracks 1313 on both sides form an opening 1314 for accommodating the second slide rail 132. The bottom plate 1311 is fixedly connected to the fixed frame 11. The second slide rail 132 includes a top plate 1321 disposed opposite to the bottom plate 1311, inner side plates 1322 vertically extending downward on both sides of the top plate 1321. The free ends of the inner side plates 1322 are bent outward to form lower tracks 1323. The lower tracks 1323 are arranged at intervals opposite to the upper tracks 1313. The rolling component 133 includes a first rolling body 1331, a second rolling body 1332, and a cage 1333 for preventing the first rolling body 1331 and the second rolling body 1332 from disengaging. The first rolling body 1331 is disposed between the bottom plate 1311 and the top plate 1321, and the second rolling body 1332 is disposed between the upper track 1313 and the lower track 1323. The first rolling body 1331 and the second rolling body 1332 are installed in the cage 1333, which helps to improve the stability and reliability of the sliding of the first slide rail 131 and the second slide rail 132.

[0052] The embodiment of the present application also discloses a sofa.

[0053] A sofa, referring to Figure 8 , includes a sofa posture adjustment assembly, and further includes a backrest plate 101 installed on the backrest assembly 3 and a leg rest plate 102 installed on the leg rest assembly 2. The sofa posture adjustment assembly adopts a design combining a driving component 4 and an assisting component 5, realizing the linkage adjustment of the leg rest plate 102 and the backrest plate 101 of the sofa in a certain sequence, making the sofa posture adjustment action coordinated, smooth, safe and reliable.

[0054] The working principle of a sofa posture adjustment assembly is as follows: When the posture adjustment assembly is in the sitting position, the leg rest assembly 2 and the backrest assembly 3 are both in the retracted state, and the elastic member 53 of the assisting component 5 is in the stretched state under the action of the first assisting rod 51 and the second assisting rod 52. When adjusting from the sitting position to the TV position, the driving electric cylinder 41 is energized to actuate the driving rod 411 to extend. While the driving rod 411 drives the push rod 421 to move, it also rotates. The push rod 421 drives the first leg connecting rod 21 to move. At the same time, the first assisting rod 51 and the second assisting rod 52 move under the pulling force of the elastic member 53, and the elastic member 53 then retracts. The second assisting rod 52 drives the second leg connecting rod 22 to move. The first leg connecting rod 21 drives the fourth leg connecting rod 24, and the second leg connecting rod 22 drives the third leg connecting rod 23. The third leg connecting rod 23 and the fourth leg connecting rod 24 drive the leg rest mounting plate 25 to perform an extension action. When the leg rest mounting plate 25 is fully extended, the posture adjustment assembly is in the TV position. When adjusting from the TV position to the lying position, the driving rod 411 continues to extend. The driving rod 411 drives the push rod 421 to move forward. The push rod 421 drives the first leg connecting rod 21 and the moving frame 12 to also move forward. The moving frame 12 drives the first back connecting rod 31 to move forward. The backrest fixing plate 34 is pulled by the first back connecting rod 31, the second back connecting rod 32, and the third back connecting rod 33 to extend backward into the lying position. At the same time, the elastic member 53 is in the stretched state under the pulling of the first back connecting rod 31 and the first assisting rod 51. The driving electric cylinder 41 is de-energized and the driving rod 411 stops extending, and the posture adjustment assembly is adjusted to the lying position. When the posture adjustment assembly is adjusted from the lying position to the sitting position, the driving electric cylinder 41 is energized to actuate the driving rod 411 to retract. The push rod 421 drives the first leg connecting rod 21 and the moving frame 12 to slide backward. At the same time, under the action of the restoring force of the elastic member 53, the backrest fixing plate 34 is pulled by the first back connecting rod 31, the second back connecting rod 32, and the third back connecting rod 33 to retract into the TV position. The elastic member 53 then retracts. The driving rod 411 of the driving electric cylinder 41 continues to retract. The push rod 421 rotates to drive the first leg connecting rod 21 to move backward. The first leg connecting rod 21 drives the second leg connecting rod 22 and the third leg connecting rod 23. The third leg connecting rod 23, the fourth leg connecting rod 24, and the leg rest mounting plate 25 perform a retracting movement. Finally, the leg rest mounting plate 25 is in the retracted state. The driving electric cylinder 41 is de-energized and the driving rod 411 stops retracting. During the retracting action, the second leg connecting rod 22 drives the second assisting rod 52 to act. The second assisting rod 52 drives the first assisting rod 51 to rotate, and the first assisting rod 51 thus tightens the elastic member 53 to make the elastic member 53 in the stretched state.

[0055] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application in turn. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A sofa posture adjustment assembly, comprising a seat assembly (1), two leg support assemblies (2) connected to the front end of the seat assembly (1), and two backrest assemblies (3) connected to the rear end of the seat assembly (1), the seat assembly (1) comprising a fixed frame (11), two movable frames (12) arranged side by side, and a slide rail component (13), the two movable frames (12) being slidably connected to the fixed frame (11) via the slide rail component (13), characterized in that: The invention also comprises a driving assembly (4) for driving the two leg support assemblies (2) and the two backrest assemblies (3) to expand or fold, the driving assembly (4) comprising a driving electric cylinder (41) and a pushing member (42) connected to a driving rod (411) of the driving electric cylinder (41), the two ends of the pushing member (42) being connected to the two leg support assemblies (2), the driving electric cylinder (41) being rotatably connected to the fixed frame (11), and a power assisting assembly (5) for assisting the two leg support assemblies (2) to expand first or the two backrest assemblies (3) to fold first, the power assisting assembly (5) being installed on the mobile frame (12), one end of the power assisting assembly (5) being connected to the leg support assembly (2), and the other end being connected to the backrest assembly (3).

2. The sofa posture adjustment assembly according to claim 1, characterized in that: The backrest assembly (3) comprises a first back link (31), a second back link (32), a third back link (33) and a backrest fixing plate (34); the first back link (31) and the second back link (32) are rotatably connected to the movable frame (12) respectively; the third back link (33) is rotatably arranged on the fixing frame (11); one end of the second back link (32) is rotatably connected to the third back link (33), and the other end is rotatably connected to the backrest fixing plate (34); one end of the backrest fixing plate (34) close to the first back link (31) is rotatably connected to the first back link (31); and one end of the first back link (31) away from the backrest fixing plate (34) is connected to the power assist assembly (5).

3. The sofa posture adjustment assembly according to claim 2, characterized in that: The second back-link rod (32) comprises a transmission part (321) and a support part (322) fixedly connected to the transmission part (321); the transmission part (321) and the support part (322) form a structure that is substantially perpendicular to each other; the portion where the transmission part (321) and the support part (322) are combined forms a combination part (323); the combination part (323) is rotationally connected to the movable frame (12); one end of the transmission part (321) away from the combination part (323) is rotationally connected to the backrest fixing plate (34); and one end of the support part (322) away from the combination part (323) is rotationally connected to the third back-link rod (33).

4. The sofa posture adjustment assembly according to claim 3, characterized in that: The leg support assembly (2) comprises a first leg link (21), a second leg link (22), a third leg link (23), a fourth leg link (24) and a leg support mounting plate (25); one end of the first leg link (21) and one end of the second leg link (22) are respectively rotatably connected to the moving frame (12); the other end of the first leg link (21) is rotatably connected to one end of the fourth leg link (24); the other end of the second leg link (22) is rotatably connected to one end of the third leg link (23); the middle part of the first leg link (21) is rotatably connected to the middle part of the third leg link (23); the other end of the third leg link (23) and the other end of the fourth leg link (24) are respectively rotatably connected to the leg support mounting plate (25); the two ends of the pushing member (42) are respectively fixedly connected to the first leg links (21) in the two leg support assemblies (2); the middle part of the second leg link (22) is connected to the power assist assembly (5).

5. The sofa posture adjustment assembly according to claim 4, characterized in that: The pushing member (42) comprises a push rod (421), two mounting ear plates (422) arranged at the middle position of the push rod (421), the mounting ear plates (422) are provided with mounting holes (4221), a pin shaft (43) is passed through the mounting hole (4221), and the pin shaft (43) is rotatably connected to the driving rod (411) of the driving electric cylinder (41).

6. The sofa posture adjustment assembly according to claim 5, characterized in that: The power-assisting assembly (5) comprises a first power-assisting rod (51), a second power-assisting rod (52) and an elastic member (53); the first power-assisting rod (51) is rotatably arranged on the movable frame (12); one end of the first power-assisting rod (51) is connected to one end of the elastic member (53); the other end of the elastic member (53) is connected to the first back connecting rod (31); the other end of the first power-assisting rod (51) is rotatably connected to one end of the second power-assisting rod (52); and the other end of the second power-assisting rod (52) is rotatably connected to the middle part of the second leg connecting rod (22).

7. The sofa posture adjustment assembly according to claim 6, characterized in that: The elastic member (53) is a tension spring or a rubber belt.

8. The sofa posture adjustment assembly according to claim 1, characterized in that: The slide rail component (13) comprises a first slide rail (131) fixedly connected to the fixed frame (11) and a second slide rail (132) fixedly connected to the movable frame (12); the first slide rail (131) and the second slide rail (132) are slidably connected via a rolling assembly (133).

9. The sofa posture adjustment assembly according to claim 8, characterized in that: The first slide rail (131) comprises a bottom plate (1311), outer plates (1312) extending vertically upward on both sides of the bottom plate (1311), free ends of the outer plates (1312) are bent inwardly to form upper rails (1313), the upper rails (1313) on both sides form openings (1314) for accommodating the second slide rail (132), the bottom plate (1311) is fixedly connected to the fixing frame (11); the second slide rail (132) comprises a top plate (1321) arranged opposite to the bottom plate (1311), inner plates (1322) extending vertically downward on both sides of the top plate (1321), the inner plates (1322) extending vertically downward on both sides of the top plate (1321), the inner plates (1323) extending vertically downward on both sides of the top plate (1323) The free end of the plate (1322) is bent outward to form a lower track (1323), and the lower track (1323) is arranged relatively spaced from the upper track (1313); the rolling assembly (133) comprises a first rolling body (1331), a second rolling body (1332) and a retaining frame (1333) for preventing the first rolling body (1331) and the second rolling body (1332) from disengaging, the first rolling body (1331) is arranged between the bottom plate (1311) and the top plate (1321), and the second rolling body (1332) is arranged between the upper track (1313) and the lower track (1323).

10. A sofa, characterized in that: It comprises a sofa posture adjustment assembly as claimed in any one of claims 1 to 9, comprising a backrest board (101) installed on the backrest assembly (3), and a leg support board (102) installed on the leg support assembly (2).

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