Zero-wall chair frame mechanism

Abstract

The utility model discloses a kind of zero wall chair frame mechanisms, comprising: backrest assembly, seat frame assembly, footrest plate assembly and drive unit;The backrest assembly is used to install chair back;The seat frame assembly is used to install cushion, the backrest assembly is installed in the rear end of seat frame assembly;The footrest plate assembly is installed in the front end of seat frame assembly;The fixed end and output end of the drive unit are connected in seat frame assembly and footrest plate assembly respectively, the drive unit is used to drive footrest plate assembly forward, to make it present open state, the footrest plate assembly in the process of open state drives seat frame assembly forward, make seat frame assembly drive backrest assembly to move forward, to draw apart distance with wall surface, the utility model has when backrest assembly is backward inclined, the position of backrest assembly is adjusted synchronously, make backrest assembly away from wall surface, save the advantage that electric sofa occupies space.

Description

Technical Field

[0001] This utility model belongs to the field of electric sofa technology, specifically relating to a zero-wall-leaning chair frame mechanism. Background Technology

[0002] Electric sofas offer various modes, including sitting, TV, and reclining, catering to diverse user needs. However, due to the backrest's ability to shift between upright and reclining positions during the sofa's transformation, a certain amount of space must be left behind the sofa to prevent interference from the wall. This arrangement results in a large space occupation and makes cleaning the gap between the sofa and the wall difficult. To avoid this space requirement and reduce the sofa's space requirements, a zero-wall-adhesion chair frame mechanism is proposed. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] Therefore, this utility model proposes a zero-wall-leaning chair frame mechanism, which has the advantage of simultaneously adjusting the position of the backrest assembly when the backrest assembly is tilted backward, so that the backrest assembly is away from the wall, thus saving space occupied by the electric sofa.

[0005] The zero-wall-adhesion chair frame mechanism according to an embodiment of the present utility model includes: a backrest assembly, a seat frame assembly, a footrest assembly, and a drive unit; the backrest assembly is used to install the chair back; the seat frame assembly is used to install the seat cushion, and the backrest assembly is installed at the rear end of the seat frame assembly; the footrest assembly is installed at the front end of the seat frame assembly; the fixed end and the output end of the drive unit are respectively connected to the seat frame assembly and the footrest assembly, and the drive unit is used to drive the footrest assembly to move forward so that it is in an open state. During the process of the footrest assembly being in the open state, it drives the seat frame assembly to move forward, so that the seat frame assembly drives the backrest assembly to move forward, thereby increasing the distance between the backrest assembly and the wall.

[0006] According to one embodiment of the present invention, there are two seat frame assemblies, which are arranged opposite to each other. A first mounting beam and a crossbeam are connected between the two seat frame assemblies. The first mounting beam connects the rear ends of the two seat frame assemblies, and the crossbeam connects the middle of the two seat frame assemblies.

[0007] According to one embodiment of the present invention, there are two footrest assemblies, each corresponding to one of the two seat frame assemblies, and the corresponding footrest assemblies are connected to the seat frame assemblies. A second mounting beam is connected between the two footrest assemblies, and the fixed end and the output end of the drive unit are respectively connected to the first mounting beam and the second mounting beam.

[0008] According to one embodiment of the present invention, the seat frame assembly includes: a seat frame connecting plate, a first swing link, a first parallel link, a chair frame mounting connecting plate, and a sixth swing link; the seat frame connecting plate, the first swing link, the first parallel link, and the sixth swing link form a four-bar linkage mechanism; the seat frame connecting plate and the first parallel link are arranged opposite to each other; the sixth swing link is arranged opposite to the first swing link; the chair frame mounting connecting plate is hinged to the four-bar linkage mechanism and the backrest assembly; a spring is connected between the four-bar linkage mechanism and the backrest assembly; the spring connects the backrest assembly and the first parallel link; the distance between the two pivot points of the sixth swing link is longer than the distance between the two pivot points of the first swing link. When the footrest assembly moves the seat frame connecting plate forward due to the tension of the spring, there is no relative movement between the parallel connecting rod and the chair frame mounting connecting plate. Therefore, the first swing connecting rod and the sixth swing connecting rod rotate clockwise during this process. Since the distance between the two pivot points of the sixth swing connecting rod is longer than the distance between the two pivot points of the first swing connecting rod, the rear end of the seat frame connecting plate moves downward relative to the front end when the seat frame connecting plate moves forward and upward, so that the feet are raised and the head is lowered.

[0009] According to one embodiment of the present invention, a first limiting member is formed on the seat frame connecting plate, the first limiting member being used to limit the swing angle of the first swing link.

[0010] According to one embodiment of the present invention, the seat frame assembly further includes: a second swing link, a third swing link, a fourth swing link, a second parallel link, a fifth swing link, and a seventh swing link; the lower end of the second swing link is hinged to the first parallel link, and the upper end of the second swing link is hinged to the middle of the third swing link; the lower end of the third swing link is hinged to the chair frame mounting plate; the rear end of the fourth swing link is hinged to the middle of the second swing link, and the front end of the fourth swing link is hinged to the middle of the second parallel link; the rear end of the second parallel link is hinged to the upper end of the third swing link; The upper end of the fifth swing link is hinged to the front end of the second parallel link, and the lower end of the fifth swing link is hinged to the front end of the chair frame mounting plate; the upper end of the sixth swing link is hinged to the seat frame connecting plate, and the lower end of the sixth swing link is hinged to the first parallel link; the rear end of the seventh swing link is hinged to the middle of the fifth swing link, and the front end of the seventh swing link is hinged to the first parallel link. During the transition from TV mode to reclining mode, the rotation and lifting height of the second swing link is less than that of the seventh swing link, so that during the posture transition, the footrest assembly continues to rise and the backrest assembly continues to fall.

[0011] According to one embodiment of the present invention, the number of backrest components is two, the two backrest components are arranged opposite to each other, and the two backrest components correspond one-to-one with the two seat frame components.

[0012] According to one embodiment of the present invention, when the zero-wall-leaning chair frame mechanism is in reclining mode, the angle between the seat frame connecting plate and the ground is 21°-25°.

[0013] According to one embodiment of the present invention, when the zero-wall-back chair frame mechanism is in reclining mode, the angle between the seat frame connecting plate and the backrest assembly is 131°-135°.

[0014] According to one embodiment of the present invention, the backrest assembly includes a backrest clip, a first rotating link, an L-shaped link, a first supporting link, a second rotating link, and a fixed connecting plate. The upper end of the backrest clip is used to connect to the chair back, and the front end of the backrest clip is hinged to the second rotating link. The rear end of the backrest clip is hinged to one end of the first rotating link. The L-shaped link is hinged to the first rotating link at a third connection point and a fourth connection point. The L-shaped link is hinged to one end of the first supporting link. The other end of the first supporting link is hinged to the chair frame mounting connecting plate. The lower end of the fixed connecting plate is fixedly connected to the seat frame connecting plate. The upper front end of the fixed connecting plate is hinged to the second rotating link. The upper rear end of the fixed connecting plate is hinged to the L-shaped link.

[0015] The beneficial effect of this utility model is that it uses a drive unit to drive the footrest assembly to open and retract, so that the footrest assembly drives the seat frame assembly to move forward during the opening process, and the seat frame assembly drives the backrest assembly to move forward, so that the backrest assembly gradually moves away from the wall during the backward tilting process, thereby making the zero-wall-adhesion chair frame mechanism able to be placed against the wall, saving space.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments with accompanying drawings, in which:

[0019] Figure 1 This is a side-rear view of the backrest assembly in the reclining position mode of this utility model. This view is mainly used to mark the structure of the backrest assembly.

[0020] Figure 2 This is a side view of the backrest assembly in the reclining position mode of this utility model. This view is mainly used to mark the structure of the backrest assembly.

[0021] Figure 3 This is a side-rear view of the present invention in the lying position mode. This view is mainly used to mark the structure of the seat frame assembly.

[0022] Figure 4 This is a side view of the present invention in the lying position mode. This view is mainly used to mark the structure of the seat frame assembly.

[0023] Figure 5 This is a side-rear view of the present invention in the lying position mode. This view is mainly used to mark the structure of the footrest assembly.

[0024] Figure 6 This is a side view of the present invention in the lying position mode. This view is mainly used to mark the structure of the footrest assembly.

[0025] Figure 7 This is a side view diagram of the TV mode of this utility model;

[0026] Figure 8 This is a side view of the present invention in the sitting posture mode;

[0027] Figure 9 This is a side view of the TV mode of this utility model. In order to facilitate the display of the second swing link and the seventh swing link, some parts are hidden in this view.

[0028] Figure 10 This is a side view of the utility model in the lying position mode. In order to facilitate the display of the second swing link and the seventh swing link, some parts are hidden in this view.

[0029] Figure label:

[0030] 10. Backrest assembly; 11. Backrest clip; 111. First connection point; 112. Second connection point; 12. First rotating link; 121. Third limiting member; 13. L-shaped link; 131. Third connection point; 132. Ninth connection point; 133. Fourth connection point; 134. Fifth connection point; 135. Fourth limiting member; 14. First support link; 141. Sixth connection point; 15. Second rotating link; 16. Fixed connecting plate; 161. Seventh connection point; 162. Eighth connection point;

[0031] 20. Seat frame assembly; 201. Seat frame connecting plate; 2011. Twenty-second connection point; 2012. First limiting member; 202. First swing link; 2021. Fortieth connection point; 203. First parallel link; 2031. Tenth connection point; 2032. Eleventh connection point; 2033. Twelfth connection point; 2034. Thirteenth connection point; 204. Second swing link; 205. Third swing link; 2051. Fourteenth connection point; 2052. Fifteenth connection point; 2053. 20. Connection point; 206. Chair frame mounting plate; 2061. First locking contact; 2062. Second locking contact; 207. First mounting beam; 208. Fourth swing link; 2081. Eighteenth connection point; 2082. Nineteenth connection point; 209. Second parallel link; 210. Fifth swing link; 2101. Twenty-first connection point; 2102. Twenty-third connection point; 2103. Twenty-fourth connection point; 211. Sixth swing link; 212. Seventh swing link; 213. Crossbeam;

[0032] 30. Footrest assembly; 31. Drive link; 311. 25th connection point; 312. 26th connection point; 32. Lower footrest extension link; 321. 27th connection point; 322. 28th connection point; 33. Upper footrest swing link; 331. Second limiting member; 34. Upper footrest extension link; 341. 34th connection point; 342. 35th connection point; 343. 36th connection point; 35. Lower footrest swing link; 36. Second support link; 361. 32nd connection point; 362. 33rd connection point; 37. Front footrest mounting bracket; 371. Front footrest mounting surface; 38. Rear footrest mounting bracket; 381. Rear footrest mounting surface; 382. 29th connection point; 383. 30th connection point; 384. 31st connection point; 39. Second mounting beam;

[0033] 41. First connection end; 42. Second connection end. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The zero-wall chair frame mechanism of this utility model is described in detail below with reference to the accompanying drawings.

[0038] like Figures 1-10 As shown, the zero-wall-adhesion chair frame mechanism according to an embodiment of the present invention includes: a backrest assembly 10, a seat frame assembly 20, a footrest assembly 30, and a drive unit; the backrest assembly 10 is used to install the chair back; the seat frame assembly 20 is used to install the seat cushion, and the backrest assembly 10 is installed at the rear end of the seat frame assembly 20; the footrest assembly 30 is installed at the front end of the seat frame assembly 20; the fixed end and the output end of the drive unit are respectively connected to the seat frame assembly 20 and the footrest assembly 30, and the drive unit is used to drive the footrest assembly 30 to move forward so that it is in an open state. During the process of the footrest assembly 30 being in the open state, it drives the seat frame assembly 20 to move forward, so that the seat frame assembly 20 drives the backrest assembly 10 to move forward, thereby increasing the distance between it and the wall.

[0039] In this embodiment, a drive unit is used to drive the footrest assembly 30 to open and retract, so that the footrest assembly 30 drives the seat frame assembly 20 to move forward during the opening process, and the seat frame assembly 20 drives the backrest assembly 10 to move forward, so that the backrest assembly 10 gradually moves away from the wall during the backward tilting process, thereby enabling the zero-wall-adhesion chair frame mechanism to be placed against the wall, saving space.

[0040] There are two backrest components 10, two seat frame components 20, and two footrest components 30. Each of the two backrest components 10, two seat frame components 20, and two footrest components 30 corresponds to one another. That is, the front end of one seat frame component 20 is connected to the front end of the footrest component 30 and the rear end of the backrest component 10. The two seat frame components 20 are also arranged opposite each other. A first mounting beam 207 and a crossbeam 213 connect the two seat frame components 20. The first mounting beam 207 connects the rear end of the two seat frame components 20, and the crossbeam 213 connects the middle of the two seat frame components 20. A second mounting beam 39 connects the two footrest components 30. The fixed end and the output end of the drive unit are connected to the first mounting beam 207 and the second mounting beam 39, respectively.

[0041] Backrest assembly 10 includes: a backrest clip 11, a first rotating link 12, an L-shaped link 13, a first support link 14, a second rotating link 15, and a fixed connecting plate 16. The upper end of the backrest clip 11 is used to connect to the chair back. The front end of the backrest clip 11 is hinged to the second rotating link 15 at a first connection point 111. The rear end of the backrest clip 11 is hinged to one end of the first rotating link 12 at a second connection point 112. The L-shaped link 13 is hinged to the first rotating link 12 at a third connection point 131 and a fourth connection point 133. One end of the L-shaped link 13 is hinged to the first support link 14 at a fifth connection point 134. The other end of the first support link 14 is connected to the chair frame mounting connecting plate 206 at a sixth connection point. 141 Hinged; The lower end of the fixed connecting plate 16 is fixedly connected to the seat frame connecting plate 201 at the seventh connection point 161; The upper front end of the fixed connecting plate 16 is hinged to the second rotating link 15 at the eighth connection point 162; The upper rear end of the fixed connecting plate 16 is hinged to the L-shaped link 13 at the ninth connection point 132; A third limiting member 121 is provided on the side of the first rotating link 12 facing the fixed connecting plate 16, and the third limiting member 121 is used to limit the degree of rotation of the first rotating link 12 by using the fixed connecting plate 16; A fourth limiting member 135 is provided on the side of the L-shaped link 13 facing the first support link 14, and the fourth limiting member 135 is used to limit the first support link 14 from continuing to tilt backward after reaching the sitting posture mode.

[0042] Seat frame assembly 20 includes: seat frame connecting plate 201, first swing link 202, first parallel link 203, second swing link 204, third swing link 205, chair frame mounting connecting plate 206, fourth swing link 208, second parallel link 209, fifth swing link 210, sixth swing link 211, and seventh swing link 212; one end of the first swing link 202 is hinged to the seat frame connecting plate 201 at the fortieth connection point 2021, and the other end of the first swing link 202 is connected to the first parallel link 203. The front end of the first parallel link 203 is hinged at the tenth connection point 2031; the lower end of the second swing link 204 is hinged to the rear end of the first parallel link 203 at the thirteenth connection point 2034, and the upper end of the second swing link 204 is hinged to the middle part of the third swing link 205 at the fifteenth connection point 2052; the lower end of the third swing link 205 is hinged to the chair frame mounting plate 206 at the fourteenth connection point 2051; the chair frame mounting plate 206 is hooked to the inner side panel of the sofa armrest through the first snap-fit ​​point 2061 and the second snap-fit ​​point 2062, so that... The seat frame assembly 20 is located inside the sofa; the rear end of the fourth swing link 208 is hinged to the middle of the second swing link 204 at the eighteenth connection point 2081, and the front end of the fourth swing link 208 is hinged to the middle of the second parallel link 209 at the nineteenth connection point 2082; the rear end of the second parallel link 209 is hinged to the upper end of the third swing link 205 at the twentieth connection point 2053; the upper end of the fifth swing link 210 is hinged to the front end of the second parallel link 209 at the twenty-first connection point 2101. The lower end of the sixth swing link 211 is hinged to the front end of the chair frame mounting plate 206 at the 24th connection point 2103; the upper end of the sixth swing link 211 is hinged to the seat frame connecting plate 201 at the 22nd connection point 2011, and the lower end of the sixth swing link 211 is hinged to the first parallel link 203 at the 12th connection point 2033; the rear end of the seventh swing link 212 is hinged to the middle part of the fifth swing link 210 at the 23rd connection point 2102, and the front end of the seventh swing link 212 is hinged to the first parallel link 203 at the 11th connection point 2032.

[0043] The footrest assembly 30 includes: a drive link 31, a lower footrest extension link 32, an upper footrest swing link 33, an upper footrest extension link 34, a lower footrest swing link 35, a second support link 36, a front footrest mounting bracket 37, a rear footrest mounting bracket 38, and a second mounting beam 39; the rear end of the drive link 31 is hinged to the middle of the sixth swing link 211 at the twenty-fifth connection point 311, and the front end of the drive link 31 is hinged to the rear end of the lower footrest extension link 32 at the twenty-sixth connection point 312; The footrest extension link 32 is hinged to the seat frame connecting plate 201 at the twenty-seventh connection point 321 near the rear end. The front end of the lower footrest extension link 32 is hinged to the rear end of the upper footrest swing link 33 at the twenty-eighth connection point 322. The upper end of the rear footrest mounting bracket 38 has a rear footrest mounting surface 381 bent out. The rear end of the rear footrest mounting bracket 38 is hinged to the front end of the upper footrest swing link 33 at the twenty-ninth connection point 382. The front end of the rear footrest mounting bracket 38 is hinged to the rear end of the front footrest mounting bracket 37. The end is hinged at the thirtieth connection point 383; the upper end of the front footrest mounting bracket 37 is bent to form a front footrest mounting surface 371; the front end of the second support link 36 is hinged to the middle of the front footrest mounting bracket 37 at the thirty-third connection point 362, and the rear end of the second support link 36 is hinged to the front end of the lower footrest swing link 35 at the thirty-second connection point 361; the lower footrest swing link 35 is hinged to the lower end of the rear footrest mounting bracket 38 at the thirty-first connection point 384, and the rear end of the lower footrest swing link 35 is hinged to the upper footrest mounting bracket 38 at the thirty-first connection point 384. The front end of the footrest extension link 34 is hinged at the thirty-fifth connection point 342, the rear end of the upper footrest extension link 34 is hinged to the seat frame connecting plate 201 at the thirty-fourth connection point 341, and the upper footrest extension link 34 and the upper footrest swing link 33 are hinged at the thirty-sixth connection point 343. The upper footrest swing link 33 is provided with a second limiting member 331, which is used to limit the positional relationship between the upper footrest swing link 33 and the upper footrest extension link 34 when the footrest assembly 30 is opened, so as to prevent the front end of the footrest assembly 30 from collapsing.

[0044] The seat frame connecting plate 201, the first swing link 202, the first parallel link 203, and the sixth swing link 211 form a four-bar linkage. The seat frame connecting plate 201 and the first parallel link 203 are arranged opposite to each other, and the sixth swing link 211 is arranged opposite to the first swing link 202. The chair frame mounting connecting plate 206 is hinged to the four-bar linkage and the backrest assembly 10. A spring is connected between the four-bar linkage and the backrest assembly 10. One end of the spring is connected to the first connecting end 41 of the first parallel link 203, and the other end of the spring is connected to the second connecting end 42 of the first support link 14. The distance between the two pivot points of the sixth swing link 211 is longer than the distance between the two pivot points of the first swing link 202. When the footrest assembly 30 moves the seat frame connecting plate 201 forward due to the tension of the spring, the first parallel link 203 and the chair frame mounting connecting plate 206 do not move relative to each other. Therefore, the first swing link 202 and the sixth swing link 211 rotate clockwise during this process. Since the distance between the two pivot points of the sixth swing link 211 is longer than the distance between the two pivot points of the first swing link 202, the rear end of the seat frame connecting plate 201 moves downward relative to the front end when the seat frame connecting plate 201 moves forward and upward, so that the feet are higher than the head.

[0045] A first limiting member 2012 is formed on the seat frame connecting plate 201, which is used to limit the swing angle of the first swing link 202.

[0046] When the first swing link 202 abuts against the first limiting member 2012, the seat frame connecting plate 201, the first swing link 202, the first parallel link 203, and the sixth swing link 211 form a fixed four-bar linkage. In this state, the footrest assembly 30, which continues to move forward, and the fixed four-bar linkage pull the spring, generating secondary motion. Specifically, the first parallel link 203 pulls the second swing link 204 and the seventh swing link 212 to rotate counterclockwise around the fifteenth connection point 2052 and the twenty-third connection point 2102, respectively. The fourth swing link 208, which is hinged in the middle of the second swing link 204, pushes the second parallel link 209 to move forward and upward, so that the third swing link 205 and the fifth swing link 210 rotate clockwise around the fourteenth connection point 2051 and the twenty-fourth connection point 2103 with the chair frame mounting connecting plate 206, thereby realizing the forward and upward movement of the seat frame connecting plate 201 and the footrest assembly 30 relative to the chair frame mounting connecting plate 206.

[0047] During the transition from TV mode to reclining mode, the rotational lifting height of the second swing link 204 is less than that of the seventh swing link 212, so that during the posture transition, the footrest assembly 30 continues to rise and the backrest assembly 10 continues to fall.

[0048] When the zero-wall-adhesive chair frame mechanism is in reclining mode, the angle between the seat frame connecting plate 201 and the ground is 21°-25°.

[0049] When the zero-wall-back chair frame mechanism is in reclining mode, the angle between the seat frame connecting plate 201 and the backrest assembly 10 is 131°-135°.

[0050] Operating steps: During the transition from seated mode to TV mode: One end of the drive unit is hinged to the first mounting beam 207, and the other end is hinged to the second mounting beam 39. When the drive unit pushes the second mounting beam 39 forward, it causes the upper footrest extension link 34 to rotate counterclockwise around the thirty-fourth connection point 341 to open. During the rotation and opening of the upper footrest extension link 34, through the hinge with the upper footrest swing link 33 at the thirty-sixth connection point 343, the upper footrest swing link 33 is pushed forward and upward, while the lower footrest extension link 32 rotates... The twenty-seventh connection point 321 is rotated counterclockwise to open, the lower footrest swing linkage 35 is pushed forward and upward to drive the rear footrest mounting bracket 38 to rotate counterclockwise to open, and at the same time drive the second support linkage 36 to rotate to open, push the front footrest mounting bracket 37 to rotate counterclockwise to open, so that the front footrest mounting surface 371 moves from the state hidden inside the sofa to a near-horizontal state, and the rear footrest mounting surface 381 moves from the vertical state to a near-horizontal state. The rear footrest mounting surface 381 and the front footrest mounting surface 371 are in the same plane when they are open.

[0051] When the drive unit opens the footrest assembly 30, it also drives the drive link 31, which is hinged to the rear end of the lower footrest extension link 32, to move forward. This causes the sixth swing link 211 to rotate clockwise around the twelfth connection point 2033, and the first swing link 202 to rotate clockwise around the tenth connection point 2031. This causes the seat frame connecting plate 201 to move forward relative to the first parallel link 203, thus achieving the effect of moving the seat frame forward. At this time, the sitting mode is changed to TV mode.

[0052] During the transition from TV mode to reclining mode: when the upper footrest extension link 34 abuts against the second limiting member 331 on the upper footrest swing link 33, the footrest assembly 30 is fully opened, and at the same time, the first swing link 202 in the seat frame assembly 20 abuts against the first limiting member 2012 on the seat frame connecting plate 201, and the forward movement of the seat frame connecting plate 201 relative to the first parallel link 203 stops.

[0053] The drive unit continues to push the second mounting beam 39, causing the seat frame connecting plate 201 to continue moving forward. Because the first limiting member 2012 abuts against the first swing link 202, the first parallel link 203 also moves forward, causing the second swing link 204 and the seventh swing link 212 to rotate counterclockwise around the fifteenth connection point 2052 and the twenty-third connection point 2102, respectively. The third swing link 205 and the fifth swing link 210 rotate clockwise around the fourteenth connection point 2051 and the twenty-fourth connection point 2103, respectively, which are connected to the chair frame mounting connecting plate 206. This causes the footrest assembly 30, the seat frame connecting plate 201, and the backrest clip 11 connected to the rear end of the seat frame connecting plate 201 to be pushed further forward and upward. Simultaneously, the seat frame connecting plate 201 continues to move forward. At the same time, the fixed connecting plate 16 fixed to the rear end of the seat frame connecting plate 201 also moves forward, thereby pulling the L-shaped connecting rod 13 forward. Due to the restraint of the first support connecting rod 14 connected to the fifth connecting point 134 on the L-shaped connecting rod 13, the L-shaped connecting rod 13 moves forward while rotating clockwise around the ninth connecting point 132, causing the first support connecting rod 14 to rotate clockwise around the sixth connecting point 141. The fifth connecting point 134 descends, causing the L-shaped connecting rod 13 and the first rotating connecting rod 12 to sink, causing the second connecting point 112 on the backrest clip 11 to rotate counterclockwise around the first connecting point 111 and descend. The chair back installed on the backrest clip 11 rotates counterclockwise and lies down, while the footrest assembly 30 and the front end of the seat frame connecting plate 201 are raised, reaching the zero-gravity reclining posture mode.

[0054] As the sofa transitions from TV mode to reclining mode, the seat frame connecting plate 201 and the backrest assembly 10 move forward continuously. This causes the backrest assembly 10, seat frame assembly 20, and footrest assembly 30 to move forward continuously as the backrest is opened, avoiding the risk of interference between the backrest assembly 10 and the wall and achieving the function of placing the sofa against the wall.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A zero-wall-adhesion chair frame mechanism, characterized in that, include: Backrest assembly (10), the backrest assembly (10) is used to mount the chair back; Seat frame assembly (20), the seat frame assembly (20) is used to install the seat cushion, and the backrest assembly (10) is installed at the rear end of the seat frame assembly (20); A footrest assembly (30) is mounted on the front end of the seat frame assembly (20); The drive unit has its fixed end and output end connected to the seat frame assembly (20) and the footrest assembly (30) respectively. The drive unit is used to drive the footrest assembly (30) to move forward so that it is in an open state. During the process of the footrest assembly (30) being in the open state, it drives the seat frame assembly (20) to move forward, so that the seat frame assembly (20) drives the backrest assembly (10) to move forward, so as to increase the distance from the wall. The seat frame assembly (20) includes: a seat frame connecting plate (201), a first swing link (202), a first parallel link (203), a chair frame mounting connecting plate (206), and a sixth swing link (211); the seat frame connecting plate (201), the first swing link (202), the first parallel link (203), and the sixth swing link (211) form a four-bar linkage mechanism; the seat frame connecting plate (201) and the first parallel link (203) are arranged opposite to each other; the sixth swing link (211) and the first swing link (202) are arranged opposite to each other; the chair frame mounting connecting plate (206) is hinged to the four-bar linkage mechanism and the backrest assembly (10); a spring is connected between the four-bar linkage mechanism and the backrest assembly (10); the spring connects the backrest assembly (10) and the first parallel link (203); the distance between the two pivot points of the sixth swing link (211) is longer than the distance between the two pivot points of the first swing link (202).

2. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, The number of seat frame assemblies (20) is two, and the two seat frame assemblies (20) are arranged opposite to each other. A first mounting beam (207) and a crossbeam (213) are connected between the two seat frame assemblies (20). The first mounting beam (207) connects the rear ends of the two seat frame assemblies (20), and the crossbeam (213) connects the middle of the two seat frame assemblies (20).

3. The zero-wall-adhesion chair frame mechanism according to claim 2, characterized in that, There are two footrest assemblies (30), and each footrest assembly (30) corresponds to one of the two seat frame assemblies (20). The corresponding footrest assembly (30) is connected to the seat frame assembly (20). A second mounting beam (39) is connected between the two footrest assemblies (30). The fixed end and the output end of the drive unit are respectively connected to the first mounting beam (207) and the second mounting beam (39).

4. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, A first limiting member (2012) is formed on the seat frame connecting plate (201), which is used to limit the swing angle of the first swing link (202).

5. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, The seat frame assembly (20) further includes: a second swing link (204), a third swing link (205), a fourth swing link (208), a second parallel link (209), a fifth swing link (210), and a seventh swing link (212); the lower end of the second swing link (204) is hinged to the first parallel link (203), and the upper end of the second swing link (204) is hinged to the middle of the third swing link (205); the lower end of the third swing link (205) is hinged to the chair frame mounting plate (206); the rear end of the fourth swing link (208) is hinged to the middle of the second swing link (204), and the front end of the fourth swing link (208) is hinged to the middle of the second parallel link (209); the rear end of the second parallel link (209) is hinged to the middle of the second swing link (204). The upper end of the third swing link (205) is hinged; the upper end of the fifth swing link (210) is hinged to the front end of the second parallel link (209), and the lower end of the fifth swing link (210) is hinged to the front end of the chair frame mounting plate (206); the upper end of the sixth swing link (211) is hinged to the seat frame connecting plate (201), and the lower end of the sixth swing link (211) is hinged to the first parallel link (203); the rear end of the seventh swing link (212) is hinged to the middle part of the fifth swing link (210), and the front end of the seventh swing link (212) is hinged to the first parallel link (203). During the process of switching from TV mode to reclining mode, the rotation and lifting height of the second swing link (204) is less than the rotation and lifting height of the seventh swing link (212).

6. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, The number of backrest components (10) is two, the two backrest components (10) are arranged opposite to each other, and the two backrest components (10) correspond one-to-one with the two seat frame components (20).

7. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, When the zero-wall-supported chair frame mechanism is in reclining mode, the angle between the seat frame connecting plate (201) and the ground is 21°-25°.

8. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, When the zero-wall-back chair frame mechanism is in reclining mode, the angle between the seat frame connecting plate (201) and the backrest assembly (10) is 131°-135°.

9. The zero-wall-adhesion chair frame mechanism according to claim 1, characterized in that, The backrest assembly (10) includes a backrest clip (11), a first rotating link (12), an L-shaped link (13), a first supporting link (14), a second rotating link (15), and a fixed connecting plate (16). The upper end of the backrest clip (11) is used to connect to the chair back. The front end of the backrest clip (11) is hinged to the second rotating link (15). The rear end of the backrest clip (11) is hinged to one end of the first rotating link (12). The L-shaped link (13) and the first rotating link (12) are connected at the third... Connection point (131) and fourth connection point (133) are hinged together; the L-shaped connecting rod (13) is hinged to one end of the first supporting connecting rod (14); the other end of the first supporting connecting rod (14) is hinged to the chair frame mounting connecting plate (206); the lower end of the fixed connecting plate (16) is fixedly connected to the seat frame connecting plate (201); the upper front end of the fixed connecting plate (16) is hinged to the second rotating connecting rod (15); the upper rear end of the fixed connecting plate (16) is hinged to the L-shaped connecting rod (13).

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