Sofa angle adjustment device

Abstract

The present invention discloses a sofa angle adjustment device, comprising a frame, a sofa placement structure and a tilting drive device; wherein the sofa placement structure can be pivotally arranged on the frame, and the tilting drive device is arranged to drive the sofa placement structure to rotate on the frame. The semi-finished sofa and parts to be further assembled are placed / fixed on the sofa placement structure. Since the sofa needs to be flipped to a proper angle in some processes to facilitate the work of the staff, after the sofa is placed / fixed, the staff operates and controls the tilting drive device to drive the sofa placement structure to carry the sofa to adjust the angle on the frame until the finished sofa and parts are flipped to an angle suitable for wiring / connection work; during the work process, there is no need to manually flip the sofa and parts, which saves manpower and time and improves production efficiency.

Description

Technical Field

[0001] The invention relates to a sofa angle adjusting device. Background Art

[0002] The assembly process of the finished sofa is to assemble various parts in various process positions on the production line in sequence until the assembly production is completed. In some processes, the sofa needs to be flipped to an appropriate angle; currently, semi-finished sofas are usually flipped manually to a suitable angle. For example, in the wiring process for a sofa with an electrically adjustable backrest function, the bottom of the sofa needs to be flipped to face the staff. The manual production method consumes a lot of manpower and time, and has the disadvantage of low production efficiency. Summary of the invention

[0003] According to one aspect of the present invention, in order to overcome the defects of the above-mentioned prior art, a sofa angle adjustment device is provided, which includes: a frame, a sofa placement structure and a tilting drive device; wherein the sofa placement structure can be pivotally arranged on the frame, and the tilting drive device is configured to drive the sofa placement structure to rotate on the frame.

[0004] In this way, during work, the semi-finished sofa and parts to be further assembled are placed / fixed on the sofa placement structure. Since the sofa needs to be flipped over at an appropriate angle in some processes to facilitate the work of the staff (for example, when performing the wiring process for a sofa with an electric adjustment function, the bottom of the sofa needs to be flipped over to face the staff), after the sofa is placed / fixed, the staff operates the tilting drive device to drive the sofa placement structure to carry the sofa on the frame to adjust the angle until the finished sofa and parts are flipped to an angle suitable for the wiring / wiring work; during the work process, there is no need to manually flip the sofa and parts, which saves manpower and time and improves production efficiency.

[0005] In some embodiments, the sofa placement structure includes a first seat, a second seat and a third seat; the first seat, the second seat and the third seat are arranged on a frame in sequence, the first seat, the second seat and the third seat are synchronously flipped and linked, and a tilting drive device is linked to at least one of the first seat, the second seat and the third seat, so that when the tilting drive device is working, the first seat, the second seat and the third seat are synchronously rotated on the frame.

[0006] In this way, by configuring the sofa placement structure to include the first seat, the second seat and the third seat, a multi-seat sofa formed by a combination of multiple seats can be placed on the sofa placement structure of the present invention during production and assembly, with the side sofa seats at both ends of the multi-seat sofa placed on the first seat and the third seat, and the middle seat portion of the multi-seat sofa placed on the second seat; since the first seat, the second seat and the third seat are synchronously flipped and linked, when the tilting drive device drives at least one of the first seat, the second seat and the third seat, the first seat, the second seat and the third seat drive the entire multi-seat sofa to synchronously adjust the angle.

[0007] In some embodiments, the tilting drive device is arranged in linkage with the first seat and the third seat.

[0008] In this way, when the tilting drive device is working, the tilting drive device drives the first seat and the third seat, the first seat and the third seat drive the second seat, and the first seat, the second seat and the third seat drive the entire multi-seat sofa to adjust the angle synchronously.

[0009] In some embodiments, the tilt drive device includes a first cylinder and a second cylinder, the telescopic end of the first cylinder is connected to the first seat, and the telescopic end of the second cylinder is connected to the third seat.

[0010] In this way, when the tilting drive device is working, the telescopic ends of the first cylinder and the second cylinder extend out, the first cylinder drives the first seat to rotate, and the second cylinder drives the third seat to rotate, thereby realizing "the tilting drive device is configured to drive the sofa placement structure to rotate on the frame".

[0011] In some embodiments, the first seat includes a first seat frame support portion and a first backrest support portion, and the first backrest support portion is arranged on the first seat frame support portion; the first seat frame support portion is pivotally arranged on the frame, and the telescopic end of the first cylinder is connected to the first seat frame support portion.

[0012] In this way, by configuring the first seat to include a first seat frame support portion and a first backrest support portion, when producing a sofa with a backrest, the backrest of the sofa group can be abutted and fixed on the first backrest support portion, and at the same time, the seat frame of the sofa group (a component for supporting the sofa seat surface) can be abutted and fixed on the first seat frame support portion, so that the sofa group can be more stably fixed on the sofa placement structure; in addition, since the telescopic end of the first cylinder is connected to the first seat frame support portion, when the first cylinder is actuated, the first cylinder drives the first seat frame support portion to rotate with the first backrest support portion, thereby driving the sofa to adjust its angle.

[0013] In some embodiments, the third seat includes a third seat surface support portion and a third backrest support portion, the third backrest support portion is arranged on the third seat surface support portion; the third seat surface support portion is pivotally arranged on the frame, and the telescopic end of the second cylinder is connected to the third seat surface support portion.

[0014] In this way, by configuring the third seat to include a third seat frame support portion and a third backrest support portion, when producing a sofa with a backrest, the backrest of the sofa group can be abutted and fixed on the third backrest support portion, and at the same time, the seat frame of the sofa group (a component for supporting the sofa seat surface) can be abutted and fixed on the third seat frame support portion, so that the sofa group can be more stably fixed on the sofa placement structure; in addition, since the telescopic end of the second cylinder is connected to the third seat frame support portion, when the first cylinder is actuated to drive the first seat to rotate, the second cylinder synchronously drives the third seat frame support portion to rotate the third backrest support portion at an angle, thereby driving the sofa to adjust its angle.

[0015] In some embodiments, the first seat is further provided with a first locking structure for limiting the position of the sofa, and the third seat is further provided with a third locking structure for limiting the position of the sofa.

[0016] In this way, when the sofa group is placed on the sofa placement structure, the first side of the sofa group can be abutted against the first positioning structure, and the second side of the sofa group can be abutted against the third positioning structure, thereby limiting the offset of the sofa group in the length direction, so that the sofa group can be stably installed on the sofa placement structure.

[0017] In some embodiments, the first locking structure provides a first sofa limiting direction for the first seat, and the third locking structure provides a second sofa limiting direction for the third seat, and the first sofa limiting direction and the second sofa limiting direction are arranged opposite to each other; the first seat is slidably arranged on the frame along the first sofa limiting direction, and the third seat is slidably arranged on the frame along the second sofa limiting direction; the sofa angle adjustment device also includes a transfer drive device, and the transfer drive device is arranged to drive the first seat and the third seat to slide toward or away from each other; when the first seat and the third seat slide toward each other, the first locking structure and the third locking structure move toward each other to produce a sofa clamping action; when the first seat and the third seat slide away from each other, the first locking structure and the third locking structure move away from each other to produce a sofa loosening action.

[0018] In this way, after the sofa group is placed on the sofa placement structure, the transfer drive device drives the first seat and the third seat to slide toward each other, and the first clamping structure and the third clamping structure move toward each other to produce a sofa clamping action, clamping and fixing the sofa in the length direction, and then the sofa is stably clamped by the limiting effect of the first clamping structure and the third clamping structure to prevent the sofa from loosening and displacing during the angle flipping process; in addition, since the first seat and the third seat can be slidably arranged on the frame, the distance between the first seat and the third seat can be adjusted according to the size of the sofa, and the transfer drive device can automatically drive the first seat and the third seat to move toward each other or away from each other according to the size of the sofa, so that sofas of different sizes can be automatically clamped.

[0019] In some embodiments, the transfer drive device includes a first linear motor, a second linear motor and a linear guide; the linear guide is arranged on the frame, the first seat and the third seat sleeves are arranged on the linear guide, the driving end of the first linear motor is linked to the first seat, and the driving end of the second linear motor is linked to the third seat.

[0020] In this way, when the transfer drive device drives the first seat and the third seat to slide toward each other, the first linear motor drives the first seat to move toward the third seat, and at the same time the second linear motor drives the third seat to move toward the first seat; when the transfer drive device drives the first seat and the third seat to slide back to back, the first linear motor drives the first seat to move away from the third seat, and at the same time the second linear motor drives the third seat to move away from the first seat.

[0021] In some embodiments, it also includes a first pallet, a first slider, a second pallet and a second slider; the first seat is pivotally disposed on the first pallet, the first pallet is disposed on the first slider, and the first slider sleeve is disposed on the linear guide rail; the third seat is pivotally disposed on the second pallet, the second pallet is disposed on the second slider, and the second slider sleeve is disposed on the linear guide rail; the first cylinder is disposed on the first pallet, and the second cylinder is disposed on the second pallet.

[0022] In this way, since the first seat is pivotally arranged on the first support plate, and the first support plate is slidably arranged on the linear guide rail through the first slider, it is realized that "the first seat is slidably arranged on the frame along the first sofa limiting direction", and since the first cylinder is arranged on the first support plate, when the first seat slides on the frame, the first cylinder can also slide together, even if the position of the first seat changes, it will not affect the first cylinder driving the first seat to flip and adjust; since the third seat is pivotally arranged on the second support plate, and the second support plate is slidably arranged on the linear guide rail through the second slider, it is realized that "the third seat is slidably arranged on the frame along the second sofa limiting direction", and since the second cylinder is arranged on the second support plate, when the third seat slides on the frame, the second cylinder can also slide together, even if the position of the third seat changes, it will not affect the second cylinder driving the third seat to flip and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a sofa angle adjustment device according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of another viewing angle of the sofa angle adjustment device shown;

[0025] Figure 3 for Figure 1 A top view of the sofa angle adjustment device shown;

[0026] Figure 4 for Figure 1 A schematic diagram of the sofa angle adjustment device shown in FIG. 1 after the tilting driving device drives the sofa placement structure to tilt and flip at an angle;

[0027] Figure 5 for Figure 4 The sofa angle adjustment device shown in FIG. is a schematic diagram after the sofa is assembled and restored to its initial state, and the tilt drive device drives the sofa placement structure to return to its initial angle.

[0028] Among them, the meanings of the figure numbers are as follows: 1, frame; 21, first seat; 211, first seat frame support portion; 212, first backrest support portion; 213, first clamping structure; 22, second seat; 23, third seat; 231, third seat surface support portion; 232, third backrest support portion; 233, third clamping structure; 31, first cylinder; 32, second cylinder; 41, first linear motor; 42, second linear motor; 43, linear guide; 51, first support plate; 52, first slider; 53, second support plate; 54, second slider. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] Figure 1-5 The sofa angle adjustment device according to one embodiment of the present invention is schematically shown. Figure 1-5 As shown, it includes a frame 1, a sofa placement structure and a tilting drive device; wherein the sofa placement structure can be pivotally arranged on the frame 1, and the tilting drive device is configured to drive the sofa placement structure to rotate on the frame 1.

[0034] In this way, during work, the semi-finished sofa and parts to be further assembled are placed / fixed on the sofa placement structure. Since the sofa needs to be flipped over at an appropriate angle in some processes to facilitate the work of the staff (for example, when performing wiring and wiring processes for a sofa with an electric adjustment function, the bottom of the sofa needs to be flipped over to face the staff), after the sofa is placed / fixed, the staff operates the tilting drive device to drive the sofa placement structure to carry the sofa on the frame 1 to adjust the angle until the finished sofa and parts are flipped to an angle suitable for wiring / wiring work; during the work process, there is no need to manually flip the sofa and parts, which saves manpower and time and improves production efficiency.

[0035] In detail, in the present embodiment, the sofa placement structure includes a first seat 21, a second seat 22 and a third seat 23; the first seat 21, the second seat 22 and the third seat 23 are arranged on the frame 1 in sequence, the first seat 21, the second seat 22 and the third seat 23 are synchronously flipped and linked, and the tilting drive device is linked with at least one of the first seat 21, the second seat 22 and the third seat 23, so that when the tilting drive device is working, the first seat 21, the second seat 22 and the third seat 23 are synchronously rotated on the frame 1. In this way, by configuring the sofa placement structure to include the first seat 21, the second seat 22 and the third seat 23, during production and assembly, a multi-seat sofa formed by a combination of multiple seats can be placed on the sofa placement structure of the present invention, with the side sofa seats at both ends of the multi-seat sofa placed on the first seat 21 and the third seat 23, and the middle seat portion of the multi-seat sofa placed on the second seat 22; since the first seat 21, the second seat 22 and the third seat 23 are synchronously flipped and linked, when the tilting drive device drives at least one of the first seat 21, the second seat 22 and the third seat 23, the first seat 21, the second seat 22 and the third seat 23 drive the entire multi-seat sofa to synchronously adjust the angle.

[0036] In further detail, in this embodiment, the tilting driving device is linked with the first seat 21 and the third seat 23. Thus, when the tilting driving device is working, the tilting driving device drives the first seat 21 and the third seat 23, and the first seat 21 and the third seat 23 drive the second seat 22, and the first seat 21, the second seat 22 and the third seat 23 drive the entire multi-seat sofa to adjust the angle synchronously.

[0037] In this embodiment, the tilting drive device includes a first cylinder 31 and a second cylinder 32, the telescopic end of the first cylinder 31 is connected to the first seat 21, and the telescopic end of the second cylinder 32 is connected to the third seat 23. In other embodiments, the specific structure of the tilting drive device can also be adjusted appropriately according to actual conditions, that is, as long as it can achieve "the tilting drive device is configured to drive the sofa placement structure to rotate on the frame 1", it can be used. In this way, when the tilting drive device is working, the telescopic ends of the first cylinder 31 and the second cylinder 32 extend, the first cylinder 31 drives the first seat 21 to rotate, and the second cylinder 32 drives the third seat 23 to rotate, that is, "the tilting drive device is configured to drive the sofa placement structure to rotate on the frame 1" is achieved.

[0038] In this embodiment, the first seat 21 includes a first seat frame support portion 211 and a first backrest support portion 212, and the first backrest support portion 212 is arranged on the first seat frame support portion 211; the first seat frame support portion 211 is pivotally arranged on the frame 1, and the telescopic end of the first cylinder 31 is connected to the first seat frame support portion 211. In this way, by setting the first seat 21 to include the first seat frame support portion 211 and the first backrest support portion 212, when producing a sofa with a backrest, the backrest of the sofa group can be abutted and fixed on the first backrest support portion 212, and at the same time, the seat frame of the sofa group used to support the sofa seat surface is abutted and fixed on the first seat frame support portion 211, so that the sofa group can be more stably fixed on the sofa placement structure; in addition, since the telescopic end of the first cylinder 31 is connected to the first seat frame support portion 211, when the first cylinder 31 is actuated, the first cylinder 31 drives the first seat frame support portion 211 to rotate with the first backrest support portion 212, thereby driving the sofa to adjust its angle.

[0039] In this embodiment, the third seat 23 includes a third seat surface support portion 231 and a third backrest support portion 232, and the third backrest support portion 232 is arranged on the third seat surface support portion 231; the third seat surface support portion 231 is pivotally arranged on the frame 1, and the telescopic end of the second cylinder 32 is connected to the third seat surface support portion 231. In this way, by configuring the third seat 23 to include a third seat 23 frame support portion and a third backrest support portion 232, when producing a sofa with a backrest, the backrest of the sofa group can be abutted and fixed on the third backrest support portion 232, and at the same time, the seat frame of the sofa group used to support the sofa seat surface can be abutted and fixed on the third seat 23 frame support portion, so that the sofa group can be more stably fixed on the sofa placement structure; in addition, since the telescopic end of the second cylinder 32 is connected to the third seat 23 frame support portion, when the first cylinder 31 is actuated to drive the first seat 21 to rotate, the second cylinder 32 synchronously drives the third seat 23 frame support portion to rotate the third backrest support portion 232, thereby driving the sofa to adjust its angle.

[0040] In this embodiment, a first clamping structure 213 for limiting the position of the sofa is further provided on the first seat 21, and a third clamping structure 233 for limiting the position of the sofa is further provided on the third seat 23. In this way, when the sofa set is placed on the sofa placement structure, the first side of the sofa set can be pressed against the first clamping structure 213, and the second side of the sofa set can be pressed against the third clamping structure 233, thereby limiting the offset of the sofa set in the length direction, so that the sofa set can be stably installed on the sofa placement structure.

[0041] In this embodiment, the first clamping structure 213 provides a first sofa limiting direction for the first seat 21, and the third clamping structure 233 provides a second sofa limiting direction for the third seat 23, and the first sofa limiting direction and the second sofa limiting direction are arranged opposite to each other; the first seat 21 is slidably arranged on the frame 1 along the first sofa limiting direction, and the third seat 23 is slidably arranged on the frame 1 along the second sofa limiting direction; the present invention also includes a transfer drive device, which is configured to drive the first seat 21 and the third seat 23 to slide toward or away from each other; when the first seat 21 and the third seat 23 slide toward each other, the first clamping structure 213 and the third clamping structure 233 move toward each other to produce a sofa clamping action; when the first seat 21 and the third seat 23 slide away from each other, the first clamping structure 213 and the third clamping structure 233 move away from each other to produce a sofa loosening action. The first sofa limiting direction and the second sofa limiting direction limit the left and right sides of the sofa group in the length direction, respectively. In other embodiments, the first sofa limiting direction and the second sofa limiting direction can also limit the upper and lower sides of the sofa group in the width direction, respectively. In this way, after the sofa group is placed on the sofa placement structure, the transfer drive device drives the first seat 21 and the third seat 23 to slide towards each other, and the first clamping structure 213 and the third clamping structure 233 move towards each other to produce a sofa clamping action, clamping and fixing the sofa in the length direction, and then through the limiting action of the first clamping structure 213 and the third clamping structure 233, the sofa is stably clamped to prevent the sofa from loosening and displacing during the angle flipping process; in addition, since the first seat 21 and the third seat 23 can be slidably arranged on the frame 1, the distance between the first seat 21 and the third seat 23 can be adjusted according to the size of the sofa, and the transfer drive device can automatically drive the first seat 21 and the third seat 23 to move towards each other or away from each other according to the size of the sofa, so that sofas of different sizes can be automatically clamped.

[0042] In this embodiment, the transfer drive device includes a first linear motor 41, a second linear motor 42 and a linear guide 43; the linear guide 43 is arranged on the frame 1, the first seat 21 and the third seat 23 sliding sleeves are arranged on the linear guide 43, the driving end of the first linear motor 41 is linked with the first seat 21, and the driving end of the second linear motor 42 is linked with the third seat 23. In this way, when the transfer drive device drives the first seat 21 and the third seat 23 to slide toward each other, the first linear motor 41 drives the first seat 21 to move closer to the third seat 23, and the second linear motor 42 drives the third seat 23 to move closer to the first seat 21; when the transfer drive device drives the first seat 21 and the third seat 23 to slide back to back, the first linear motor 41 drives the first seat 21 to move away from the third seat 23, and the second linear motor 42 drives the third seat 23 to move away from the first seat 21.

[0043] In this embodiment, it also includes a first support plate 51, a first slider 52, a second support plate 53 and a second slider 54; the first seat 21 is pivotally arranged on the first support plate 51, the first support plate 51 is arranged on the first slider 52, and the first slider 52 sleeve is arranged on the linear guide rail 43; the third seat 23 is pivotally arranged on the second support plate 53, the second support plate 53 is arranged on the second slider 54, and the second slider 54 sleeve is arranged on the linear guide rail 43; the first cylinder 31 is arranged on the first support plate 51, and the second cylinder 32 is arranged on the second support plate 53. In this way, since the first seat 21 is pivotally arranged on the first support plate 51, and the first support plate 51 is slidably arranged on the linear guide rail 43 through the first slider 52, it is realized that "the first seat 21 is slidably arranged on the frame 1 along the first sofa limiting direction", and since the first cylinder 31 is arranged on the first support plate 51, when the first seat 21 slides on the frame 1, the first cylinder 31 can also slide together, even if the position of the first seat 21 changes, it will not affect the first cylinder 31 driving the first seat 21 to flip and adjust; since the third seat 23 is pivotally arranged on the second support plate 53, and the second support plate 53 is slidably arranged on the linear guide rail 43 through the second slider 54, it is realized that "the third seat 23 is slidably arranged on the frame 1 along the second sofa limiting direction", and since the second cylinder 32 is arranged on the second support plate 53, when the third seat 23 slides on the frame 1, the second cylinder 32 can also slide together, even if the position of the third seat 23 changes, it will not affect the second cylinder 32 driving the third seat 23 to flip and adjust.

[0044] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A sofa angle adjustment device, characterized in that: It comprises a frame (1), a sofa placement structure and a tilting drive device; Wherein, the sofa placement structure is pivotally arranged on the frame (1), and the tilting drive device is configured to drive the sofa placement structure to rotate on the frame (1); The sofa placement structure comprises a first seat (21), a second seat (22) and a third seat (23); the first seat (21), the second seat (22) and the third seat (23) are arranged in sequence on the frame (1); the first seat (21), the second seat (22) and the third seat (23) are synchronously flipped and linked; the tilting drive device is linked with at least one of the first seat (21), the second seat (22) and the third seat (23), so that when the tilting drive device is in operation, the first seat (21), the second seat (22) and the third seat (23) are synchronously rotated on the frame (1); The tilting drive device is arranged in linkage with the first seat (21) and the third seat (23); The tilting drive device comprises a first cylinder (31) and a second cylinder (32), wherein the telescopic end of the first cylinder (31) is connected to the first seat (21), and the telescopic end of the second cylinder (32) is connected to the third seat (23); The first seat (21) comprises a first seat frame support portion (211) and a first backrest support portion (212), wherein the first backrest support portion (212) is arranged on the first seat frame support portion (211); The first seat frame support portion (211) is pivotally arranged on the frame (1), and the telescopic end of the first cylinder (31) is connected to the first seat frame support portion (211); The third seat (23) comprises a third seat surface support portion (231) and a third backrest support portion (232), wherein the third backrest support portion (232) is arranged on the third seat surface support portion (231); The third seat surface support portion (231) is pivotally arranged on the frame (1), and the telescopic end of the second cylinder (32) is connected to the third seat surface support portion (231); The first seat (21) is also provided with a first locking structure (213) for limiting the position of the sofa, and the third seat (23) is also provided with a third locking structure (233) for limiting the position of the sofa; The first locking structure (213) provides a first sofa limiting direction for the first seat (21), and the third locking structure (233) provides a second sofa limiting direction for the third seat (23), the first sofa limiting direction and the second sofa limiting direction being arranged opposite to each other; the first seat (21) is slidably arranged on the frame (1) along the first sofa limiting direction, and the third seat (23) is slidably arranged on the frame (1) along the second sofa limiting direction; The sofa angle adjustment device further comprises a transfer drive device, wherein the transfer drive device is configured to drive the first seat (21) and the third seat (23) to slide towards or away from each other; When the first seat (21) and the third seat (23) slide towards each other, the first clamping structure (213) and the third clamping structure (233) move towards each other to produce a sofa clamping action; When the first seat (21) and the third seat (23) slide back to back, the first latching structure (213) and the third latching structure (233) move away from each other back to back, thereby causing a loosening action of the sofa.

2. The sofa angle adjustment device according to claim 1, characterized in that: The transfer drive device comprises a first linear motor (41), a second linear motor (42) and a linear guide rail (43); The linear guide rail (43) is arranged on the frame (1), the first seat (21) and the third seat (23) sliding sleeves are arranged on the linear guide rail (43), the driving end of the first linear motor (41) is arranged in linkage with the first seat (21), and the driving end of the second linear motor (42) is arranged in linkage with the third seat (23).

3. The sofa angle adjustment device according to claim 2, characterized in that: It also includes a first support plate (51), a first slide block (52), a second support plate (53) and a second slide block (54); The first seat (21) is pivotally arranged on the first supporting plate (51), the first supporting plate (51) is arranged on the first sliding block (52), and the sliding sleeve of the first sliding block (52) is arranged on the linear guide rail (43); The third seat (23) is pivotally arranged on the second supporting plate (53), the second supporting plate (53) is arranged on the second sliding block (54), and the sliding sleeve of the second sliding block (54) is arranged on the linear guide rail (43); The first cylinder (31) is arranged on the first supporting plate (51), and the second cylinder (32) is arranged on the second supporting plate (53).

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