Adjustable sofa backrest

Abstract

The utility model relates to the technical field of sofas, in particular to an adjustable sofa backrest, which comprises armrests arranged on two sides of the top of a base in the width direction, a back plate vertically mounted on the edge of the back of the base, and mounting plates parallelly arranged on the back plate, the two longitudinal sides of the first sliding block are rotationally connected with connecting blocks, the two connecting blocks are jointly connected with a movable frame, and a back cushion is installed on the side, back on to the back plate, of the movable frame. The motor drives the lead screw to rotate so as to drive the first sliding block to ascend and descend along the mounting plate, then a user can easily adjust the height of the back cushion to meet the use requirements of users with different heights, meanwhile, by adjusting the height of the back cushion, the user can find the most comfortable sitting posture according to the height and sitting posture habits of the user, and the use comfort is improved.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, and in particular to an adjustable sofa backrest. Background Technology

[0002] As people's living standards improve, their requirements for home environments are also increasing. Sofas, as one of the most common pieces of furniture in living rooms, not only need to have an aesthetically pleasing appearance but also provide a comfortable seating experience. Traditional sofa backrests are usually fixed and non-adjustable. Firstly, for taller users, the fixed and relatively low backrest can easily lead to lower back and back fatigue after prolonged use, affecting their health and comfort. Conversely, if the sofa backrest is set too high, shorter users are prone to neck fatigue, also impacting their health and comfort. Secondly, users require different backrest angles when resting in different positions, and since sofa backrests are fixed and non-adjustable, they cannot meet the backrest needs of different users in various resting postures.

[0003] Therefore, it is necessary to design an adjustable sofa backrest to meet the backrest height requirements of users of different heights and the backrest requirements of users in different postures when resting. Utility Model Content

[0004] The technical solution is as follows: An adjustable sofa backrest includes armrests on both sides of the top width of the base, a seat cushion on the top of the base, and a back panel vertically mounted on the back edge of the base. It also includes mounting plates arranged side-by-side on the back panel, with a first slider slidably connected to the mounting plate. Connecting blocks are rotatably connected to both sides of the first slider, and the two connecting blocks are connected to a movable frame. A back cushion is mounted on the side of the movable frame facing away from the back panel. The first slider moves up and down along the mounting plate to adjust the height of the back cushion. An adjustment component is provided between the movable frame and the mounting plate to drive the connecting blocks to rotate and adjust the tilt angle of the movable frame and the back cushion.

[0005] Furthermore, the adjustment assembly includes a second slider slidably mounted on the mounting plate, a U-shaped rod mounted on the back of the movable frame, and a hinge plate whose two ends are respectively rotatably connected to the second slider and the U-shaped rod. The second slider is located below the first slider.

[0006] Furthermore, an electric push rod is also installed on the mounting plate to provide power for the lifting and lowering movement of the second slider, and the movable end of the electric push rod is fixedly connected to the second slider.

[0007] Furthermore, a support plate is installed on the top of the mounting plate, and a motor is installed on the support plate. The output shaft of the motor is connected to a lead screw, and the lead screw thread passes through the first slider.

[0008] Furthermore, the back panel has grooves for the movable frame and cushion to tilt and move.

[0009] Furthermore, a footrest is slidably installed between the seat cushion and the base, and the footrest can be moved horizontally to adjust its position according to the leg support needs.

[0010] Furthermore, casters are installed at the bottom of the footrest.

[0011] The beneficial effects are as follows: 1. The motor drives the lead screw to rotate, thereby driving the first slider to move up and down along the mounting plate, so that the user can easily adjust the height of the backrest to meet the needs of users of different heights. At the same time, by adjusting the height of the backrest, the user can find the most comfortable sitting posture according to their own height and sitting habits, thus improving the comfort of use.

[0012] 2. The electric push rod drives the second slider to move downward. The second slider drives the movable frame to rotate around the hinge point between the connecting block and the first slider through the cooperation of the hinge plate and the U-shaped rod. This allows the tilt angle of the backrest to be adjusted to adapt to different rest needs, so that the user can find the most comfortable backrest angle when resting, reduce the pressure on the waist and back, and relieve fatigue.

[0013] 3. The sliding footrest provides additional leg support and increases comfort. Users can freely adjust the position of the footrest according to their leg length and support needs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the components of this utility model, including the cushion, movable frame, mounting plate, and back panel.

[0016] Figure 3 This is a cross-sectional three-dimensional structural diagram of the movable frame of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the adjustment component of this utility model.

[0018] The parts and their numbers in the diagram are as follows: 1. Base, 101. Backplate, 2. Armrest, 3. Seat cushion, 4. Backrest cushion, 5. Movable frame, 6. Mounting plate, 7. First slider, 8. Connecting block, 9. Second slider, 10. Hinge plate, 11. U-shaped rod, 12. Electric push rod, 13. Support plate, 14. Motor, 15. Lead screw, 16. Footrest, 17. Casters. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0020] Example: An adjustable sofa backrest, such as Figure 1 and Figure 2 As shown, the sofa includes a base 1, a back panel 101, armrests 2, a seat cushion 3, a backrest cushion 4, a movable frame 5, a mounting plate 6, a first slider 7, and a connecting block 8. The base 1 is the foundation of the entire sofa. Armrests 2 are provided on both sides of the top width of the base 1, providing support and grip. A seat cushion 3 is provided on the top of the base 1, positioned between the two armrests 2, to provide a comfortable seating experience. The back panel 101 is vertically mounted on the back edge of the base 1, and is used to mount the backrest assembly of the sofa. The mounting plate 6 is arranged side by side on the back panel 101, and is used to mount and adjust the backrest assembly. The first slider 7 is slidably connected to the mounting plate 6 in a lifting manner. The first slider 7 is used to adjust the height of the backrest 4 to accommodate users of different heights. The first slider 7 is rotatably connected to the two sides of the longitudinal axis with connecting blocks 8. The two connecting blocks 8 are fixed together to the movable frame 5. The backrest 4 is installed on the side of the movable frame 5 facing away from the back plate 101. The backrest 4 is used to provide comfortable back support. The first slider 7 is raised and lowered along the mounting plate 6 to adjust the height of the backrest 4. An adjustment component is provided between the movable frame 5 and the mounting plate 6 to drive the connecting blocks 8 to rotate and adjust the tilt angle of the movable frame 5 and the backrest 4. The back plate 101 is provided with a groove for the movable frame 5 and the backrest 4 to tilt. The groove is provided to ensure that the movable frame 5 and the backrest 4 move smoothly during the tilt adjustment process.

[0021] like Figure 3 and Figure 4 As shown, the adjustment assembly includes a second slider 9 slidably mounted on the mounting plate 6, a U-shaped rod 11 mounted on the back of the movable frame 5, and a hinge plate 10 whose two ends are rotatably connected to the second slider 9 and the U-shaped rod 11, respectively. The second slider 9 is located below the first slider 7. An electric push rod 12 for providing power for the lifting and lowering movement of the second slider 9 is also mounted on the mounting plate 6. The movable end of the electric push rod 12 is fixedly connected to the second slider 9. When the movable end of the electric push rod 12 extends downward, the electric push rod 12 pushes the second slider 9 to move downward along the mounting plate 6. When the second slider 9 moves downward, it is driven to move by the rotational cooperation between the hinge plate 10 and the U-shaped rod 11. The frame 5 rotates around the connection point between the connecting block 8 and the first slider 7, causing the lower end of the movable frame 5 to tilt away from the mounting plate 6 and the upper end of the movable frame 5 to move closer to the back plate 101. This adjusts the tilt angle of the movable frame 5 and the backrest 4, allowing the user to find the most comfortable backrest angle when resting, reducing pressure on the waist and back, and relieving fatigue. In addition, the second slider 9 is raised and lowered by the electric push rod 12, and through the cooperation of the hinge plate 10 and the U-shaped rod 11, the movable frame 5 and the backrest 4 can remain stable during the tilting process, without shaking or jamming, ensuring the safety and comfort of the user during use.

[0022] like Figure 4 As shown, a support plate 13 is also installed on the top of the mounting plate 6. A motor 14 is installed on the support plate 13. The output shaft of the motor 14 is connected to a lead screw 15. The lead screw 15 is threaded through the first slider 7. The motor 14 drives the lead screw 15 to drive the first slider 7 to rise and fall, which can achieve precise control of the rise and fall height of the first slider 7. At the same time, after the motor 14 stops working, it is also conducive to maintaining the height of the first slider 7, thereby achieving the accuracy and stability of the height adjustment of the movable frame 5 and the cushion 4.

[0023] like Figure 1 As shown, a footrest 16 is slidably disposed between the seat cushion 3 and the base 1. The footrest 16 can be moved horizontally to adjust its position according to the leg support needs, providing additional leg support for the user. The user can freely adjust the position of the footrest 16 according to their leg length and support needs. The bottom of the footrest 16 is equipped with casters 17. The casters 17 ensure that the footrest 16 slides smoothly, reducing its sliding friction, thereby allowing the user to easily adjust the position of the footrest 16.

[0024] When the height of the backrest 4 needs to be adjusted, the motor 14 operates, driving the lead screw 15 to rotate via its output shaft. The rotation of the lead screw 15 causes the first slider 7 to move up and down along the mounting plate 6. The first slider 7, through the connecting block 8, drives the movable frame 5 to move up and down along the mounting plate 6, thus allowing the user to adjust the height of the backrest 4 according to their needs. Adjusting the height of the backrest 4 allows the user to find the most comfortable sitting posture based on their height and posture habits. When the tilt angle of the backrest 4 needs to be adjusted, firstly, the motor 14 drives the lead screw 15 to rotate, causing the first slider 7 to move upwards, thereby moving the movable frame 5 and the backrest 4 upwards. Subsequently, the electric push rod 12 extends downwards, driving the second slider 9 downwards along the mounting plate 6. When the second slider 9 moves down, it drives the movable frame 5 to rotate clockwise around the hinge point of the connecting block 8 and the first slider 7 via the hinge plate 10. This causes the top of the movable frame 5 to move towards the back of the back panel 101, and the bottom of the movable frame 5 to move away from the back panel 101. This adjusts the tilt angle of the movable frame 5, allowing the user to flexibly adjust the tilt angle of the backrest 4 according to their needs. By adjusting the tilt angle of the backrest 4, the user can find the most comfortable backrest angle when resting, reducing pressure on the waist and back. When the footrest 16 is needed to provide support for the user's legs, the footrest 16 is pulled away from the seat cushion 3 and slides forward, providing additional support for the user's legs and increasing comfort.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An adjustable sofa backrest, comprising armrests (2) provided on both sides of the top width direction of a base (1), a seat cushion (3) provided on the top of the base (1), and a back panel (101) vertically mounted on the back edge of the base (1), characterized in that, It also includes a mounting plate (6) arranged side by side on the back plate (101), a first slider (7) slidably connected to the mounting plate (6), a connecting block (8) rotatably connected to both sides of the first slider (7), a movable frame (5) connected to the two connecting blocks (8), a cushion (4) installed on the side of the movable frame (5) facing away from the back plate (101), the first slider (7) adjusting the height of the cushion (4) by raising and lowering along the mounting plate (6), and an adjustment component between the movable frame (5) and the mounting plate (6) for driving the connecting block (8) to rotate to adjust the tilt angle of the movable frame (5) and the cushion (4).

2. An adjustable sofa backrest according to claim 1, characterized in that, The adjustment assembly includes a second slider (9) slidably mounted on the mounting plate (6), a U-shaped rod (11) mounted on the back of the movable frame (5), and a hinge plate (10) with its two ends rotatably connected to the second slider (9) and the U-shaped rod (11) respectively. The second slider (9) is located below the first slider (7).

3. An adjustable sofa backrest according to claim 2, characterized in that, An electric push rod (12) is also installed on the mounting plate (6) to provide power for the lifting and lowering movement of the second slider (9). The movable end of the electric push rod (12) is fixedly connected to the second slider (9).

4. An adjustable sofa backrest according to claim 3, characterized in that, A support plate (13) is also installed on the top of the mounting plate (6). A motor (14) is installed on the support plate (13). The output shaft of the motor (14) is connected to a lead screw (15). The lead screw (15) is threaded through the first slider (7).

5. An adjustable sofa backrest according to claim 4, characterized in that, The back panel (101) has a groove for the movable frame (5) and the cushion (4) to tilt and move.

6. An adjustable sofa backrest according to claim 5, characterized in that, A footrest (16) is slidably provided between the seat cushion (3) and the base (1). The footrest (16) can be moved horizontally to adjust its position according to the leg support requirements.

7. An adjustable sofa backrest according to claim 6, characterized in that, The bottom of the footrest (16) is equipped with casters (17).

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