Multi-joint adjustable recliner

Abstract

The application discloses a multi-joint adjusting deck chair, and relates to the field of chairs, which comprises two symmetrical supporting seats, two symmetrical supporting cross bars are fixed between the two supporting seats, a cushion framework is arranged between the two supporting seats, a supporting adjusting mechanism is arranged between the cushion framework and the two supporting cross bars, a backrest framework is arranged on one side of the cushion framework, two symmetrical backrest connecting rods are fixed on the cushion framework, the two backrest connecting rods are fixedly connected with the backrest framework, and an adjusting fixing mechanism is arranged between the backrest framework and the cushion framework. The adjusting fixing mechanism drives the supporting adjusting mechanism, the supporting adjusting mechanism drives the backrest framework and the cushion framework to be inclined and adjusted, so that the use postures of the backrest framework and the cushion framework of the deck chair can be simultaneously adjusted conveniently and quickly according to needs, and the supporting supports can be simultaneously adjusted conveniently, so that the supporting supports can be in real-time cooperation with the lying postures of the deck chair.

Description

Technical Field

[0001] This application relates to the field of seating, and more particularly to a multi-joint adjustable recliner. Background Technology

[0002] In daily life, people have increasingly higher demands for the comfort and functionality of chairs. Traditional chairs mostly only provide a single sitting posture and cannot meet people's diverse needs for sitting posture in different scenarios.

[0003] For example, when working or reading for long periods of time, people may need a chair that can provide a certain recline angle to reduce physical fatigue; while when resting or relaxing, they may want to adjust the chair to a reclining position for better rest. Most chairs on the market cannot achieve this flexible posture adjustment, or the adjustment process is relatively complicated and not convenient enough.

[0004] Adjustable chairs on the market generally have separate backrests and seats. When adjusting them, you need to adjust the backrest and seat separately, which is a rather cumbersome process and cannot be done quickly and easily by adjusting the entire recliner at the same time. Utility Model Content

[0005] The purpose of this application is to address the problem mentioned in the background art, where the backrest and seat are generally set separately, requiring separate adjustments to the backrest and seat during adjustment, which is cumbersome and does not allow for convenient and quick synchronous adjustment of the entire recliner. This application provides a multi-joint adjustable recliner.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A multi-joint adjustable recliner includes two symmetrical support seats, with two symmetrical support crossbars fixed between the two support seats. A seat cushion frame is provided between the two support seats, and a support adjustment mechanism is provided between the seat cushion frame and the two support crossbars. A backrest frame is provided on one side of the seat cushion frame, and two symmetrical backrest connecting rods are fixed on the seat cushion frame. The two backrest connecting rods are fixedly connected to the backrest frame, and an adjustment and fixing mechanism is provided between the backrest frame and the seat cushion frame. Both support seats are rotatably connected to the bottom of the seat cushion frame.

[0008] By adopting the above technical solution, the seat cushion frame is installed on the support crossbar between two support seats using a support adjustment mechanism. The adjustment and fixing mechanism drives the support adjustment mechanism, which in turn drives the backrest frame and seat cushion frame to tilt and adjust. This allows for convenient and quick adjustment of the posture of the recliner backrest frame and seat cushion frame as needed, while also facilitating synchronous adjustment of the support support so that it can match the reclining posture of the recliner in real time.

[0009] Furthermore, the support adjustment mechanism includes two symmetrically arranged adjustment frames 1 between two support seats. Both adjustment frames 1 are mounted and fixed on two support crossbars. An adjustment frame 2 is fixed on each adjustment frame 1. An adjustment support rod 1 is provided at one end of each adjustment frame 1 and adjustment frame 2 near the backrest frame. Both ends of the adjustment support rod 1 are rotatably connected to adjustment frames 1 and 2. An adjustment support rod 2 is provided in the middle of adjustment frames 1 and 2. The adjustment support rod 2 is right-angled. Both ends of the adjustment support rod 2 are rotatably connected to adjustment frames 1 and 2. A connecting component is provided between adjustment frames 1 and 2 and the support bracket.

[0010] By adopting the above technical solution, the seat cushion frame moves towards the backrest frame, and the seat cushion frame tilts under the support of the first and second adjustment support rods. The seat cushion frame drives the backrest frame to tilt, and the connecting component drives the support bracket. This allows the seat cushion frame and backrest frame to tilt easily, change the support state, facilitate different uses of the chair, and allow the support bracket to adjust synchronously.

[0011] Furthermore, the connecting assembly includes a connecting support rod 1 rotatably connected to one end of the adjusting frame 1 away from the adjusting support rod 1, a connecting support rod 2 rotatably connected to one end of the connecting support rod 1 away from the adjusting frame 1, and a connecting support rod 2 rotatably connected to the end of the connecting support rod 2 away from the connecting support rod 1.

[0012] By adopting the above technical solution, when the second support rod moves, it drives the first connecting support rod, which in turn drives the second connecting support rod, which in turn drives the support bracket, thus making it convenient for the backrest frame to move and drive the support bracket.

[0013] Furthermore, the end of the adjusting frame two away from the adjusting support rod one is rotatably connected to the connecting support rod three, the end of the connecting support rod three away from the adjusting frame two is rotatably connected to the connecting support rod four, the end of the connecting support rod four away from the connecting support rod three is rotatably connected to the support bracket, and the connecting support rod two and the connecting support rod three intersect each other and are rotatably connected.

[0014] By adopting the above technical solution, when the support is moved, the support moves under the support of connecting support rod three and connecting support rod four, thereby restricting the direction and angle of the support and enabling it to move stably with the seat frame.

[0015] Furthermore, the adjustment and fixing mechanism includes an adjustment handle rotatably connected to the backrest frame. A first pressure rod is fixed in the middle of the adjustment handle. The end of the first pressure rod away from the adjustment handle is rotatably connected to the backrest frame. A second pressure rod is rotatably connected in the middle of the first pressure rod. A right-angle rod is rotatably connected in the end of the second pressure rod away from the first pressure rod. The right-angle end in the middle of the right-angle rod is rotatably connected to the support crossbar. The end of the right-angle rod away from the second pressure rod is rotatably connected to the seat cushion frame. A limit component is provided between the first connecting support rod and the first adjustment frame. A lifting component is provided between the adjustment handle and the limit component.

[0016] By adopting the above technical solution, the lifting component drives the limiting component, allowing the limiting component to release the restriction on the first adjusting support rod. Then, the adjusting handle is pressed down, causing the adjusting handle to drive the first pressing rod, which in turn drives the second pressing rod. This allows the second pressing rod to easily drive the right-angle rod, which in turn allows the right-angle rod to push the seat cushion frame to move.

[0017] Furthermore, the limiting component includes a connecting crossbar disposed between two support seats. The two ends of the connecting crossbar are fixedly connected to the corresponding connecting support rod. A connecting plate is fixed on the connecting crossbar, a connecting frame is fixed on the connecting plate, and a spring brake head is fixed on the connecting frame. A limiting plate is fixed on one of the adjusting frames. The limiting plate has three circumferentially distributed limiting holes, which correspond to the spring brake head.

[0018] By adopting the above technical solution, the connecting crossbar keeps the two connecting support rods synchronized. The spring brake head on the connecting crossbar is inserted into the limiting plate fixed on the adjusting frame, which can conveniently limit the connecting support rod and restrict the adjusting support rod, thus making it convenient for the seat frame to be moved to a certain extent and then fixed.

[0019] Furthermore, the lifting assembly includes a lifting block fixed to the adjusting handle, a lifting handle rotatably connected to the lifting block, a lifting rope provided between the lifting handle and the spring brake head, both ends of the lifting rope being fixedly connected to the lifting wrench and the spring brake head, a lifting tube fixed between the lifting block and the connecting frame, and the lifting rope located inside the lifting tube.

[0020] By adopting the above technical solution, pressing the lifting handle on the lifting block causes the lifting handle to drive the lifting rope, which in turn causes the end of the spring brake head to disengage from the limiting hole on the limiting plate, thus making it easy for the spring brake head to disengage from the limiting hole on the limiting plate.

[0021] Furthermore, the limiting plate is provided with a moving groove, which is arc-shaped and corresponds to the three limiting holes, and the spring brake head corresponds to the moving groove.

[0022] By adopting the above technical solution, the end of the limit gate moves in the moving groove on the limit plate, and the moving groove guides the spring gate, so that the spring gate can be accurately inserted into the limit hole.

[0023] In summary, this application includes at least one of the following beneficial effects;

[0024] 1. In this application, by holding the adjustment handle and pressing the lifting handle on the lifting block, the lifting handle drives the lifting rope, which in turn causes the end of the spring brake head to disengage from the limiting hole on the limiting plate. Then, pressing down the adjustment handle drives the first pressing rod, which in turn drives the second pressing rod, which in turn drives the right-angle rod, causing the right-angle rod to rotate on the support crossbar. The end of the right-angle rod connected to the seat cushion frame causes the seat cushion frame to tilt towards the backrest frame. As the seat cushion frame moves, it drives the second adjustment frame, which in turn drives the first adjustment support rod on the first adjustment frame. Under the constraint of the first adjustment support rod, the end of the second adjustment frame away from the first adjustment support rod tilts up. The adjustment mechanism drives the second adjustment support rod, which in turn drives the first connecting support rod, which in turn drives the second connecting support rod. The second adjustment mechanism drives the third connecting support rod, which in turn drives the fourth connecting support rod. When the third connecting support rod is driven, both the second and third connecting support rods rotate, causing them to extend their support brackets. This allows the support brackets and seat cushion frame to be adjusted synchronously. After adjustment, when the spring brake head moves to the new limit hole position on the limit plate, the spring brake head inserts into the new limit hole. This achieves the goal of conveniently and quickly adjusting the posture of the recliner backrest frame and seat cushion frame simultaneously as needed, while also allowing the support brackets to be adjusted synchronously, ensuring that the support brackets are in real-time coordination with the recliner's posture.

[0025] 2. In this application, when the spring brake head moves on the limit plate, the end of the limit brake head moves in the moving groove on the limit plate, and the moving groove guides the spring brake head, thereby achieving the purpose of making it easy for the spring brake head to be accurately inserted into the limit hole. Attached Figure Description

[0026] Figure 1 This is a first three-dimensional structural schematic diagram of the multi-joint adjustable recliner in this application;

[0027] Figure 2 This is a second three-dimensional structural diagram of the multi-joint adjustable recliner in this application;

[0028] Figure 3 This is a cross-sectional structural diagram of the multi-joint adjustable recliner in this application;

[0029] Figure 4 This is a three-dimensional structural diagram of the adjusting and fixing mechanism in this application;

[0030] Figure 5 This application Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 This application Figure 4 Enlarged view of point B in the middle;

[0032] Figure 7 This is a schematic diagram of the internal structure of the spring brake head in this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Support base; 2. Support crossbar; 3. Backrest frame; 4. Seat cushion frame; 5. Backrest connecting rod; 6. Support adjustment mechanism; 61. Adjustment frame one; 62. Adjustment frame two; 63. Adjustment support rod one; 64. Adjustment support rod two; 65. Connecting assembly; 651. Connecting support rod one; 652. Connecting support rod two; 653. Connecting support rod three; 654. Connecting support rod four; 7. Adjustment and fixing mechanism; 71. Adjustment... 72. Handle; 73. Downward pressure rod one; 74. Downward pressure rod two; 75. Right angle rod; 76. Limiting assembly; 77. Limiting plate; 77. Limiting hole; 78. Connecting crossbar; 79. Connecting plate; 70. Connecting frame; 71. Spring brake head; 72. Lifting assembly; 73. Lifting block; 74. Lifting handle; 75. Lifting rope; 76. Lifting tube; 77. Support bracket; 78. Moving wheel; 79. Moving groove. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0036] This application discloses a multi-joint adjustable recliner.

[0037] Reference Figure 1 , Figure 2 and Figure 3A multi-joint adjustable recliner includes two symmetrical support seats 1, two symmetrical support crossbars 2 fixed between the two support seats 1, a seat cushion frame 4 between the two support seats 1, a support adjustment mechanism 6 between the seat cushion frame 4 and the two support crossbars 2, a backrest frame 3 on one side of the seat cushion frame 4, two symmetrical backrest connecting rods 5 fixed on the seat cushion frame 4, the two backrest connecting rods 5 being fixedly connected to the backrest frame 3, an adjustment and fixing mechanism 7 between the backrest frame 3 and the seat cushion frame 4, and casters 9 rotatably connected to the bottom of each of the two support seats 1.

[0038] When using this multi-joint adjustable recliner, first, fix the backrest and seat cushions to the backrest frame 3 and seat cushion frame 4. Use the support adjustment mechanism 6 to support the seat cushion frame 4 on the two support crossbars 2. The support adjustment mechanism 6 allows the seat cushion frame 4 to be in three positions: sitting, semi-reclining, and reclining. When changing from sitting to semi-reclining or reclining, use the adjustment fixing mechanism 7 to move the seat cushion frame 4, causing the side of the seat cushion frame 4 closest to the support support 8 to tilt upwards, tilting the seat cushion frame 4 towards the backrest frame 3. Simultaneously, the seat cushion frame 4 uses the backrest connecting rod 5 to move the backrest frame 3, causing the backrest frame 3 to tilt. While the seat cushion frame 4 is tilting, the support adjustment mechanism 6... The support support 8 is driven to adjust its height and position synchronously with the tilt of the seat cushion frame 4. The adjustment and fixing mechanism 7 fixes the tilt state of the backrest frame 3 and the seat cushion frame 4, thus completing the adjustment of the backrest frame 3 and the seat cushion frame 4. By installing the seat cushion frame 4 on the support crossbar 2 between the two support seats 1 using the support adjustment mechanism 6, the adjustment and fixing mechanism 7 drives the support adjustment mechanism 6, which in turn drives the backrest frame 3 and the seat cushion frame 4 to tilt and adjust. This allows for convenient and quick adjustment of the posture of the recliner backrest frame 3 and the seat cushion frame 4 as needed, while also allowing the support support 8 to be adjusted synchronously, so that the support support 8 can match the reclining posture of the recliner in real time.

[0039] Reference Figure 1 , Figure 2 and Figure 3 The support adjustment mechanism 6 includes two symmetrically arranged adjustment frames 61 between two support seats 1. Both adjustment frames 61 are mounted and fixed on two support crossbars 2. An adjustment frame 62 is fixed on the adjustment frame 61. An adjustment support rod 63 is provided at one end of the adjustment frame 61 and the adjustment frame 62 near the backrest frame 3. Both ends of the adjustment support rod 63 are rotatably connected to the adjustment frame 61 and the adjustment frame 62. An adjustment support rod 64 is provided in the middle of the adjustment frame 61 and the adjustment frame 62. The adjustment support rod 64 is right-angled. Both ends of the adjustment support rod 64 are rotatably connected to the adjustment frame 61 and the adjustment frame 62. A connecting component 65 is provided between the adjustment frame 61, the adjustment frame 62 and the support bracket 8.

[0040] Additionally, the connecting assembly 65 includes a connecting support rod 651 rotatably connected to the end of the adjusting frame 61 away from the adjusting support rod 63, a connecting support rod 652 rotatably connected to the end of the connecting support rod 651 away from the adjusting frame 61, and a connecting support rod 652 rotatably connected to the end of the connecting support rod 652 away from the connecting support rod 651.

[0041] Furthermore, the end of the adjusting frame 2 62 away from the adjusting support rod 1 63 is rotatably connected to the connecting support rod 3 653, the end of the connecting support rod 3 653 away from the adjusting frame 2 62 is rotatably connected to the connecting support rod 4 654, the end of the connecting support rod 4 654 away from the connecting support rod 3 653 is rotatably connected to the support bracket 8, and the connecting support rod 2 652 and the connecting support rod 3 653 intersect each other and are rotatably connected.

[0042] The adjusting and fixing mechanism 7 drives the seat cushion frame 4, causing it to move towards the backrest frame 3. As the seat cushion frame 4 moves, it drives the second adjusting frame 62, which in turn drives the first adjusting support rod 63 on the first adjusting frame 61. Under the constraint of the first adjusting support rod 63, the end of the second adjusting frame 62 away from the first adjusting support rod 63 tilts upwards. The second adjusting frame 62 then drives the second adjusting support rod 64, which in turn drives the first connecting support rod 651. The first connecting support rod 651 then drives the second connecting support rod 652, and the second adjusting frame 62 drives the third connecting support rod 653. The third connecting support rod 653 then drives the fourth connecting support rod 654. When the third connecting support rod 653 is driven, the third connecting support rod 653 and the fourth connecting support rod 654... Rotating lever 652 causes connecting support lever 652 and connecting support lever 4 to extend support bracket 8, allowing support bracket 8 and seat cushion frame 4 to move synchronously. By moving seat cushion frame 4 towards backrest frame 3, seat cushion frame 4 tilts under the constraint of adjusting support lever 1 63 and adjusting support lever 2 64. Simultaneously, adjusting support lever 2 64 and adjusting bracket 2 62 drive corresponding connecting support lever 1 651 and connecting support lever 3 653, which in turn drive corresponding connecting support lever 2 652 and connecting support lever 4 654, causing support bracket 8 to extend and tilt. This allows seat cushion frame 4 and backrest frame 3 to tilt easily, changing the support state and facilitating different chair usage positions. At the same time, support bracket 8 can be adjusted synchronously.

[0043] Reference Figure 4 , Figure 5 , Figure 6 and Figure 7The adjustment and fixing mechanism 7 includes an adjustment handle 71 rotatably connected to the backrest frame 3. A first pressure rod 72 is fixed in the middle of the adjustment handle 71. The end of the first pressure rod 72 away from the adjustment handle 71 is rotatably connected to the backrest frame 3. A second pressure rod 73 is rotatably connected in the middle of the first pressure rod 72. A right-angle rod 74 is rotatably connected in the middle of the second pressure rod 73 away from the first pressure rod 72. The right-angle end of the right-angle rod 74 is rotatably connected to the support crossbar 2. The end of the right-angle rod 74 away from the second pressure rod 73 is rotatably connected to the seat cushion frame 4. A limit component 75 is provided between the first support rod 651 and the first adjustment frame 61. A lifting component 76 is provided between the adjustment handle 71 and the limit component 75.

[0044] In addition, the limiting assembly 75 includes a connecting crossbar 753 disposed between two support bases 1. The two ends of the connecting crossbar 753 are fixedly connected to the corresponding connecting support rod 651. A connecting plate 754 is fixed on the connecting crossbar 753. A connecting frame 755 is fixed on the connecting plate 754. A spring brake head 756 is fixed on the connecting frame 755. A limiting plate 751 is fixed on one of the adjusting frames 61. The limiting plate 751 has three circumferentially distributed limiting holes 752, which correspond to the spring brake head 756.

[0045] Furthermore, the lifting assembly 76 includes a lifting block 761 fixed on the adjusting handle 71, a lifting handle 762 rotatably connected to the lifting block 761, a lifting rope 763 provided between the lifting handle 762 and the spring brake head 756, both ends of the lifting rope 763 being fixedly connected to the lifting wrench and the spring brake head 756, and a lifting tube 764 fixed between the lifting block 761 and the connecting frame 755, with the lifting rope 763 located inside the lifting tube 764.

[0046] When adjusting the backrest frame 3 and seat cushion frame 4, hold the adjustment handle 71 and press the lifting handle 762 on the lifting block 761. This allows the lifting handle 762 to drive the lifting rope 763, which in turn causes the end of the spring brake head 756 to disengage from the limiting hole 752 on the limiting plate 751. Then, press down the adjustment handle 71. The adjustment handle 71 drives the first pressing rod 72, which in turn drives the second pressing rod 73. The second pressing rod 73 then drives the right-angle rod 74, causing it to rotate on the support crossbar 2. The end of the right-angle rod 74 connected to the seat cushion frame 4 causes the seat cushion frame 4 to tilt towards the backrest frame 3. As the seat cushion frame 4 tilts, the connecting support rod 651 drives the connecting plate 754, which in turn drives the connecting frame 755, causing the spring brake head 756 on the connecting frame 755 to move synchronously. When the new limiting hole 752 is in position on the limiting plate 751, the spring brake head 756 is inserted into the new limiting hole 752, limiting the connecting support rod 1 651. The connecting support rod 1 651 limits the adjusting support rod 2 64, and the connecting support rod 2 652 limits the adjusting frame 2 62, keeping the seat frame 4 in an inclined state. By pinching the lifting handle 762 on the adjusting handle 71, the lifting handle 762 drives the spring brake head 756, allowing the spring brake head 756 to disengage from the limiting plate 751, and the connecting support rod 1 651 to disengage. The seat frame 4 can tilt under the support of the adjusting support rod 1 and the adjusting support rod 2 until the spring brake head 756 moves into the new limiting hole 752, thus facilitating the movement of the seat frame 4 and limiting the moved seat frame 4, keeping the seat frame 4 in an adjusted state.

[0047] Reference Figure 3 and Figure 5 The limiting plate 751 has a movable groove 10, which is arc-shaped and corresponds to three limiting holes 752. The spring brake head 756 corresponds to the movable groove 10. When the spring brake head 756 moves on the limiting plate 751, the end of the limiting brake head moves in the movable groove 10 on the limiting plate 751. The movable groove 10 guides the spring brake head 756, so that the spring brake head 756 can be accurately inserted into the limiting hole 752.

[0048] Working principle: When using this multi-joint adjustable recliner, first fix the backrest and seat cushions to the backrest frame 3 and seat cushion frame 4. When you need to adjust the recliner's posture, hold the adjustment handle 71 and press the lifting handle 762 on the lifting block 761. This will cause the lifting handle 762 to drive the lifting rope 763, which in turn causes the end of the spring brake head 756 to disengage from the limiting hole 752 on the limiting plate 751. Then, press down the adjustment handle 71, which will drive the pressing rod 72. The first pressing rod 72 drives the second pressing rod 73, which in turn drives the right-angle rod 74, causing it to rotate on the support crossbar 2. The end of the right-angle rod 74 connected to the seat cushion frame 4 tilts the seat cushion frame 4 towards the backrest frame 3. As the seat cushion frame 4 moves, it drives the second adjusting frame 62, which in turn drives the first adjusting support rod 63 on the first adjusting frame 61. Under the constraint of the first adjusting support rod 63, the seat cushion frame 74 rotates. The end of the adjusting bracket 2 62 furthest from the adjusting support rod 1 63 tilts up. The adjusting bracket 2 62 drives the adjusting support rod 2 64, which in turn drives the connecting support rod 1 651. The connecting support rod 1 651 then drives the connecting support rod 2 652. The adjusting bracket 2 62 drives the connecting support rod 3 653, which in turn drives the connecting support rod 4 654. When the connecting support rod 3 653 is driven, both the connecting support rod 3 653 and the connecting support rod 2 652 rotate, causing the connecting support rod 2 65... 2. Extend the support bracket 8 with the connecting support 4, so that the support bracket 8 and the seat frame 4 are synchronized. After adjustment, when the spring brake head 756 moves to the new limiting hole 752 position on the limiting plate 751, the spring brake head 756 is inserted into the new limiting hole 752, so that the connecting support rod 1 651 is limited. The connecting support rod 1 651 limits the adjusting support rod 2 64, and the connecting support rod 2 652 limits the adjusting frame 2 62, so that the seat frame 4 is kept in an inclined state, and the adjustment of the recliner is completed.

Claims

1. A multi-joint adjustable recliner, comprising two symmetrical support seats (1), characterized in that: Two symmetrical support crossbars (2) are fixed between the two support seats (1). A seat frame (4) is provided between the two support seats (1). A support adjustment mechanism (6) is provided between the seat frame (4) and the two support crossbars (2). A backrest frame (3) is provided on one side of the seat frame (4). Two symmetrical backrest connecting rods (5) are fixed on the seat frame (4). The two backrest connecting rods (5) are fixedly connected to the backrest frame (3). An adjustment and fixing mechanism (7) is provided between the backrest frame (3) and the seat frame (4). The bottom of the two support seats (1) is rotatably connected to a moving wheel (9).

2. The multi-joint adjustable recliner according to claim 1, characterized in that: The support adjustment mechanism (6) includes two adjustment frames (61) symmetrically arranged between two support seats (1). Both adjustment frames (61) are mounted and fixed on two support crossbars (2). An adjustment frame (62) is fixed on the adjustment frame (61). An adjustment support rod (63) is provided at one end of the adjustment frame (61) and the adjustment frame (62) near the backrest frame (3). Both ends of the adjustment support rod (63) are rotatably connected to the adjustment frame (61) and the adjustment frame (62). An adjustment support rod (64) is provided in the middle of the adjustment frame (61) and the adjustment frame (62). The adjustment support rod (64) is right-angled. Both ends of the adjustment support rod (64) are rotatably connected to the adjustment frame (61) and the adjustment frame (62). A connecting component (65) is provided between the adjustment frame (61), the adjustment frame (62) and the support bracket (8).

3. The multi-joint adjustable recliner according to claim 2, characterized in that: The connecting assembly (65) includes a connecting support rod one (651) rotatably connected to the end of the adjusting frame one (61) away from the adjusting support rod one (63), and a connecting support rod two (652) rotatably connected to the end of the connecting support rod one (651) away from the adjusting frame one (61), and the end of the connecting support rod two (652) away from the connecting support rod one (651) rotatably connected to the support bracket (8).

4. A multi-joint adjustable recliner according to claim 3, characterized in that: The end of the second adjusting frame (62) away from the first adjusting support rod (63) is rotatably connected to the third connecting support rod (653). The end of the third connecting support rod (653) away from the second adjusting frame (62) is rotatably connected to the fourth connecting support rod (654). The end of the fourth connecting support rod (654) away from the third connecting support rod (653) is rotatably connected to the support bracket (8). The second connecting support rod (652) and the third connecting support rod (653) intersect each other and are rotatably connected.

5. A multi-joint adjustable recliner according to claim 3, characterized in that: The adjustment and fixing mechanism (7) includes an adjustment handle (71) rotatably connected to the backrest frame (3). A first pressing rod (72) is fixed in the middle of the adjustment handle (71). The end of the first pressing rod (72) away from the adjustment handle (71) is rotatably connected to the backrest frame (3). A second pressing rod (73) is rotatably connected in the middle of the first pressing rod (72). A right-angle rod (74) is rotatably connected in the end of the second pressing rod (73) away from the first pressing rod (72). The right-angle end of the right-angle rod (74) is rotatably connected to the support crossbar (2). The end of the right-angle rod (74) away from the second pressing rod (73) is rotatably connected to the seat cushion frame (4). A limit component (75) is provided between the first connecting support rod (651) and the first adjustment frame (61). A lifting component (76) is provided between the adjustment handle (71) and the limit component (75).

6. A multi-joint adjustable recliner according to claim 5, characterized in that: The limiting component (75) includes a connecting crossbar (753) disposed between two support seats (1). The two ends of the connecting crossbar (753) are fixedly connected to the corresponding connecting support rod (651). A connecting plate (754) is fixed on the connecting crossbar (753). A connecting frame (755) is fixed on the connecting plate (754). A spring brake head (756) is fixed on the connecting frame (755). A limiting plate (751) is fixed on one of the adjusting frames (61). The limiting plate (751) has three circumferentially distributed limiting holes (752). The limiting holes (752) correspond to the spring brake head (756).

7. A multi-joint adjustable recliner according to claim 6, characterized in that: The lifting assembly (76) includes a lifting block (761) fixed on an adjusting handle (71), a lifting handle (762) rotatably connected to the lifting block (761), a lifting rope (763) provided between the lifting handle (762) and the spring brake head (756), both ends of the lifting rope (763) being fixedly connected to the lifting wrench and the spring brake head (756), a lifting tube (764) fixed between the lifting block (761) and the connecting frame (755), and the lifting rope (763) located inside the lifting tube (764).

8. A multi-joint adjustable recliner according to claim 6, characterized in that: The limiting plate (751) has a moving groove (10) which is arc-shaped and corresponds to three limiting holes (752). The spring brake head (756) corresponds to the moving groove (10).

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