Sofa with backrest convenient to adjust

Abstract

The utility model discloses a sofa with a backrest convenient to adjust, which belongs to the technical field of sofas and comprises a sofa seat surface, armrest parts symmetrically arranged on two sides of the sofa seat surface, sliding grooves formed in symmetrical side surfaces of the two armrest parts, a connecting frame arranged on the sofa seat surface, and moving components arranged in the two sliding grooves. The moving assembly is used for enabling the connecting frame and the sliding groove to be in sliding fit, a backrest part is hinged to the top of the connecting frame, a supporting assembly is arranged between the backrest part and the connecting frame, the back of the connecting frame is provided with an adjusting part used for adjusting the moving assembly and the supporting assembly, the position of the back of the sofa can be adjusted, and therefore the sitting requirements of different heights can be met.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, and more specifically, to a sofa with an adjustable backrest. Background Technology

[0002] The most basic function of a sofa is to provide a place for people to rest. It allows people to sit down and relax after a long day, relieving fatigue in their legs and back. In living rooms, meeting rooms, and other similar spaces, sofas are important venues for interaction and communication. They can accommodate multiple people sitting around a sofa, facilitating face-to-face conversations.

[0003] As societal demands increase, people's requirements for sofa functionality are also constantly growing. Existing sofas have a fixed depth of seating surface. When users of different heights sit on them, in order for their backs to fit snugly against the backrest, their legs often cannot be in a proper posture, or for the sake of leg comfort, the backrest cannot provide adequate support for the back. To address these issues, a solution is proposed below. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a sofa with an adjustable backrest, which can adjust the position of the backrest to meet the seating needs of different heights.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A sofa with an adjustable backrest includes a seat surface, armrests symmetrically arranged on both sides of the seat surface, and sliding grooves formed on the symmetrical sides of the two armrests. A connecting frame is provided on the seat surface, and a moving component is provided inside the two sliding grooves. The moving component is used to slide the connecting frame and the sliding grooves. A backrest is hinged to the top of the connecting frame, and a support component is provided between the backrest and the connecting frame. An adjustment part for adjusting the moving component and the support component is provided on the back of the connecting frame.

[0007] Preferably, the moving component includes a first one-way rack, a first pawl, a spring, and a mounting bracket. The first one-way rack is mounted on the top of the slide groove, the mounting bracket is mounted on the side of the connecting bracket, the first pawl is rotatably arranged on the mounting bracket, the first pawl and the first one-way rack mesh with each other, the spring is arranged between the mounting bracket and the first pawl, and the two ends of the spring are in contact with the first pawl and the mounting bracket, respectively.

[0008] Preferably, a slide rail is provided at the bottom of the slide groove, and a slider is slidably disposed on the slide rail, the slider being fixedly connected to the mounting bracket.

[0009] Preferably, the support assembly includes a support plate, a slide bar, a connecting block, a second one-way rack, a second pawl, and an elastic plate. Two slide bars are provided and symmetrically arranged inside the connecting frame. The connecting block is slidably arranged on the two slide bars. The support plate is rotatably mounted on the connecting block. The other end of the support plate is hinged to the backrest. The second one-way rack is located at the bottom of the connecting block, and the second one-way rack and the connecting frame are in a sliding engagement. The elastic plate is located between the second one-way rack and the connecting frame. The second pawl is fixed to the side of the connecting block, and the second pawl and the second one-way rack mesh.

[0010] Preferably, the adjustment part includes a fixed handle, a movable handle, and steel wire ropes. The fixed handle is installed on one side of the connecting frame, the movable handle is slidably arranged inside the fixed handle, and a plurality of steel wire ropes are provided. One end of the plurality of steel wire ropes is connected to the movable handle, and the other end of the plurality of steel wire ropes is respectively connected to the movable component and the support component.

[0011] Preferably, the connecting frame has symmetrically formed limit grooves, and a limit block is slidably arranged inside the limit groove. The limit block and one end of the second unidirectional rack are fixedly connected.

[0012] Preferably, the back of the backrest is provided with a curtain that serves to shield the connecting frame.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] I. This solution provides seating for users through the sofa seat, while the armrests support the hands and the backrest supports the back. The movable components allow adjustment of the position of the connecting frame on the sofa seat, thereby moving the backrest and adjusting the depth of the sofa seat to accommodate people of different heights. The support components allow adjustment of the angles of the connecting frame and the backrest, thus adjusting the angles of the backrest and the sofa seat to meet different seating needs.

[0015] Second, by cooperating with the first pawl and the first one-way rack, the connecting frame can only move in the direction where the depth of the sofa seat decreases. When it is necessary to move in the opposite direction, the first pawl and the first one-way rack need to be separated.

[0016] Third, the cooperation between the slide rail and the slider is used to ensure the stable movement of the connecting frame and prevent separation.

[0017] Fourth, by adjusting the position of the connecting block on the slide bar, the angle of the backrest is adjusted, and the second pawl and the second one-way rack act as a locking mechanism to provide support.

[0018] 5. By pulling the movable handle, the steel wire rope can be moved, which in turn drives the first pawl and the second one-way rack to move, thus making it easy to move the position of the backrest and adjust its angle.

[0019] VI. The design of the limiting groove and limiting block is used to limit and guide the up and down sliding of the second unidirectional rack.

[0020] 7. The blinds are used to cover the connecting frame, thus ensuring the overall aesthetics. Attached Figure Description

[0021] Figure 1 This is a front view structural diagram of the present utility model;

[0022] Figure 2 This is a cross-sectional view of the side view of this utility model.

[0023] Figure 3 This is a schematic diagram showing the position and structure of the handrail and the slide groove of this utility model;

[0024] Figure 4 This is a schematic diagram showing the positional structure of the connecting frame, moving component, supporting component, and adjusting part of this utility model.

[0025] Figure 5 This is an enlarged structural schematic diagram of A in this utility model;

[0026] Figure 6 This is an enlarged structural schematic diagram of B of this utility model;

[0027] Figure 7 This is a schematic diagram showing the position and structure of the slide rail, slider, and mounting bracket of this utility model.

[0028] Explanation of the labels in the diagram:

[0029] 1. Sofa seat; 2. Armrest; 3. Slide rail; 4. Connecting frame; 5. Moving component; 6. Backrest; 7. Support component; 8. Adjustment part; 9. First one-way rack; 10. First pawl; 11. Spring; 12. Mounting bracket; 13. Slide rail; 14. Slider; 15. Support plate; 16. Slide rod; 17. Connecting block; 18. Second one-way rack; 19. Second pawl; 20. Elastic sheet; 21. Fixed handle; 22. Moving handle; 23. Steel wire rope; 24. Limiting groove; 25. Limiting block; 26. Curtain. Detailed Implementation

[0030] Example 1:

[0031] Please see Figure 1-7A sofa with an adjustable backrest includes a sofa seat 1. Four legs are evenly distributed at the bottom of the sofa seat 1, which provide support for the sofa seat 1. Armrests 2 are symmetrically arranged on both sides of the sofa seat 1. The sofa seat 1 is used for users to sit on, and the armrests 2 serve to limit movement and support the user's hands.

[0032] The two armrests 2 have symmetrical grooves 3 on their sides. A connecting frame 4 is provided on the sofa seat 1. The backrest 6 is hinged to the top of the connecting frame 4. The two grooves 3 have moving components 5 inside. The moving components 5 and the connecting frame 4 cooperate in one direction. The moving components 5 include a first one-way rack 9, a first pawl 10, a spring 11 and a mounting frame 12. A slide rail 13 is provided at the bottom of the groove 3. A slider 14 is slidably provided on the slide rail 13. The slider 14 and the mounting frame 12 are fixedly connected. The mounting frame 12 is installed on the side of the connecting frame 4. The first one-way rack 9 is installed on the top of the groove 3. The first pawl 10 is rotatably arranged on the mounting frame 12. The first pawl 10 and the first one-way rack 9 mesh with each other. A triangular block is installed on the mounting frame 12. The spring 11 is arranged between the triangular block and the first pawl 10. The two ends of the spring 11 are in contact with the first pawl 10 and the triangular block, respectively. The triangular block is used to ensure that the spring 11 is in a straight state and to ensure the service life of the spring 11.

[0033] Compared to traditional fixed-back sofas, this sofa has significant advantages in its adjustability. Traditional sofas have a fixed seat depth, which cannot meet the needs of users of different heights. This sofa, however, uses a movable component 5 to flexibly adjust the distance from one end of the seat 1 to the backrest 6, adapting to the usage habits of people of different heights. Regarding backrest angle adjustment, traditional sofas typically have a fixed backrest angle, while this sofa's backrest 6 can be adjusted between 90-135°, providing users with a more comfortable seating posture. Moreover, the adjustment operation of this sofa is extremely simple; users only need to operate the adjustment mechanism to complete the adjustment of the seat depth and backrest angle, greatly improving the user experience and effectively reducing user fatigue.

[0034] With the cooperation of the first pawl 10 and the first one-way rack 9, the connecting frame 4 can move directly to the other end of the sofa seat 1 without the need for adjustment at both ends, reducing the number of operation steps. At the same time, the moving connecting piece can drive the backrest 6 to move, adjusting the distance between one end of the sofa seat 1 and the backrest 6 to meet the seating needs of people of different heights.

[0035] A support assembly 7 is provided between the backrest 6 and the connecting frame 4. The support assembly 7 includes a support plate 15, a slide rod 16, a connecting block 17, a second one-way rack 18, a second pawl 19, and an elastic plate 20. Two slide rods 16 are provided and symmetrically arranged inside the connecting frame 4. The connecting block 17 is slidably arranged on the two slide rods 16. The support plate 15 is rotatably mounted on the connecting block 17. The other end of the support plate 15 is hinged to the backrest 6. The second one-way rack 18 is located at the bottom of the connecting block 17, and the second one-way rack 18 and the connecting frame 4 are in a sliding engagement. The connecting frame 4 has symmetrically opened limit grooves 24. Limit blocks 25 are slidably arranged inside the limit grooves 24. The limit blocks 25 and one end of the second one-way rack 18 are fixedly connected. The elastic plate 20 is located between the second one-way rack 18 and the connecting frame 4. The second pawl 19 is fixed to the side of the connecting block 17 and meshes with the second one-way rack 18.

[0036] The second pawl 19 and the second one-way rack 18 work together to provide one-way support for the connecting block 17, while the support plate 15 supports the backrest 6, thus ensuring the stability of the backrest 6. By moving the position of the connecting block 17 on the slide bar 16, the angle of the backrest 6 can be adjusted, thereby meeting the user's needs for different angles of the backrest 6.

[0037] The back of the connecting frame 4 is provided with an adjustment part 8 for adjusting the moving component 5 and the support component 7. The adjustment part 8 includes a fixed handle 21, a moving handle 22, and a steel wire rope 23. The fixed handle 21 is installed on one side of the connecting frame 4, and the moving handle 22 is slidably arranged inside the fixed handle 21. Several steel wire ropes 23 are provided, and one end of each steel wire rope 23 is connected to the moving handle 22. One of the steel wire ropes 23 is fixedly connected to a second one-way rack 18, and the bottom of the second one-way rack 18 is provided with a connection point. The first guide rod is fixedly connected to the frame 4 to ensure that the steel wire rope 23 and the connection end of the second one-way rack 18 are arranged vertically. The other two steel wire ropes 23 pass through the side and the triangular block of the connecting frame 4 respectively and are connected to the first pawl 10. The steel wire rope 23 passes through the spring 11 to ensure that the steel wire rope 23 and the first pawl 10 are perpendicular. In addition, a second guide rod is installed inside the connecting frame 4 to guide the steel wire rope 23 connected to the first pawl 10, so as to ensure the tension of the steel wire rope 23 on the first pawl 10.

[0038] By pulling the movable handle 22, the steel wire rope 23 can be pulled, which in turn pulls the second one-way rack 18 and the first pawl 10, thereby separating the first pawl 10 from the first one-way rack 9, and separating the second pawl 19 from the second one-way rack 18. This allows the connecting frame 4 to easily move the backrest 6, adjust the position of the backrest 6, and rotate the backrest 6 to adjust its angle.

[0039] This application also includes a curtain 26 sewn to the top of the back of the backrest 6. The bottom of the curtain 26 has Velcro fasteners, and the side of the sofa seating surface has Velcro fasteners. The other end of the curtain 26 is secured by the cooperation of the Velcro fasteners and the Velcro fasteners, thus concealing the connecting frame 4. The cooperation of the Velcro fasteners and the Velcro fasteners allows for appropriate position adjustment, accommodating changes in the position of the curtain 26 due to adjustments in the angle of the backrest 6. The design of the curtain 26 not only enhances the overall aesthetics of the sofa, making the back of the sofa neater and more attractive, but also protects the connecting frame 4 to a certain extent, extending its service life. The cooperative design of the Velcro fasteners and the Velcro fasteners allows users to easily adjust the position of the curtain 26 according to changes in the angle of the backrest 6, maintaining a good concealing effect and enhancing user satisfaction.

[0040] Working principle:

[0041] In use, when the user adjusts the position of the backrest 6, by pushing the backrest 6, the backrest 6 is forced to move the connecting frame 4, which in turn moves the mounting frame 12, thereby causing the slider 14 to move on the slide rail 13. At the same time, the first pawl 10 moves from the inclined surface of the locking teeth of the first one-way rack 9 and engages with the right-angle surface of the locking teeth of the first one-way rack 9, thus completing the adjustment of the position of the backrest 6. This can meet the usage needs of different users, ensuring that the backrest 6 can only move in one direction and that the backrest 6 will not move backward when the user is on it.

[0042] When the angle of the backrest 6 needs to be adjusted, the backrest 6 is rotated. The backrest 6 will rotate around the hinge with the connecting frame 4. The rotation of the backrest 6 will drive the support plate 15 to move, and the angle between the support plate 15 and the backrest 6 will change. At the same time, the support plate 15 will drive the connecting block 17 to slide on the slide rod 16. The connecting block 17 will drive the second pawl 19 to move from the surface of the second one-way rack 18, thereby adjusting the angle of the backrest 6. The cooperation of the second one-way rack 18 and the second pawl 19 is used to support the backrest 6 and ensure that the backrest 6 is subjected to force.

[0043] When the position and angle of the backrest 6 need to be adjusted in opposite directions, pull the movable handle 22. The movable handle 22 will drive the steel wire rope 23 to move. The steel wire rope 23 will pull the second one-way rack 18 to move, thereby separating the second one-way rack 18 from the second one-way pawl. This allows the angle of the backrest 6 to be adjusted. At the same time, the corresponding steel wire rope 23 will pull the first pawl 10 to rotate, thereby separating the first pawl 10 from the first one-way rack 9. This allows the position of the connecting frame 4 and the backrest 6 to be adjusted. Meanwhile, the elastic plate 20 and the spring 11 can both reset the second one-way rack 18 and the first pawl 10.

Claims

1. A sofa with an easily adjustable backrest, characterized in that: The sofa includes a seat (1), armrests (2) are symmetrically arranged on both sides of the seat (1), and sliding grooves (3) are opened on the symmetrical sides of the two armrests (2). A connecting frame (4) is provided on the seat (1), and a moving component (5) is provided inside the two sliding grooves (3). The moving component (5) is used to slide the connecting frame (4) and the sliding groove (3). A backrest (6) is hinged to the top of the connecting frame (4), and a support component (7) is provided between the backrest (6) and the connecting frame (4). An adjustment part (8) for adjusting the moving component (5) and the support component (7) is provided on the back of the connecting frame (4).

2. The sofa with an adjustable backrest according to claim 1, characterized in that: The moving component (5) includes a first one-way rack (9), a first pawl (10), a spring (11), and a mounting bracket (12). The first one-way rack (9) is mounted on the top of the slide (3), and the mounting bracket (12) is mounted on the side of the connecting bracket (4). The first pawl (10) is rotatably arranged on the mounting bracket (12), and the first pawl (10) and the first one-way rack (9) mesh with each other. The spring (11) is arranged between the mounting bracket (12) and the first pawl (10), and the two ends of the spring (11) are in contact with the first pawl (10) and the mounting bracket (12), respectively.

3. A sofa with an adjustable backrest according to claim 2, characterized in that: The bottom of the slide groove (3) is provided with a slide rail (13), and a slider (14) is slidably provided on the slide rail (13). The slider (14) and the mounting bracket (12) are fixedly connected.

4. A sofa with an adjustable backrest according to claim 1, characterized in that: The support assembly (7) includes a support plate (15), a slide rod (16), a connecting block (17), a second one-way rack (18), a second pawl (19), and an elastic plate (20). Two slide rods (16) are provided and symmetrically arranged inside the connecting frame (4). The connecting block (17) is slidably arranged on the two slide rods (16). The support plate (15) is rotatably arranged on the connecting block (17). The other end of the support plate (15) is hinged to the backrest (6). The second one-way rack (18) is located at the bottom of the connecting block (17), and the second one-way rack (18) and the connecting frame (4) are in a sliding fit. The elastic plate (20) is located between the second one-way rack (18) and the connecting frame (4). The second pawl (19) is fixed to the side of the connecting block (17), and the second pawl (19) meshes with the second one-way rack (18).

5. A sofa with an adjustable backrest according to claim 1, characterized in that: The adjustment unit (8) includes a fixed handle (21), a movable handle (22), and a steel wire rope (23). The fixed handle (21) is installed on one side of the connecting frame (4). The movable handle (22) is slidably arranged inside the fixed handle (21). A plurality of steel wire ropes (23) are provided. One end of the plurality of steel wire ropes (23) is connected to the movable handle (22), and the other end of the plurality of steel wire ropes (23) is connected to the movable component (5) and the support component (7) respectively.

6. A sofa with an adjustable backrest according to claim 4, characterized in that: The connecting frame (4) is symmetrically provided with limiting grooves (24), and a limiting block (25) is slidably provided inside the limiting groove (24). The limiting block (25) is fixedly connected to one end of the second one-way rack (18).

7. A sofa with an adjustable backrest according to claim 1, characterized in that: The backrest (6) is provided with a curtain (26) on the back to shield the connecting frame (4).

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