A backrest adjustment structure for a seat

Abstract

The present invention discloses a backrest adjustment structure for a seat, which relates to the technical field of seats, and specifically is a backrest adjustment structure for a seat, including an armrest housing and a seat backrest. A connection surface is provided on one side of the armrest housing, and a connection hole located on the connection surface is opened on one side of the armrest housing. For this backrest adjustment structure of the seat, through the cooperative use of the armrest housing, the up-and-down moving plate, the front-and-back sliding plate, the second spring, the first spring, the arc-shaped limiting groove, the moving column, and the fixed rotating shaft and the positioning rod, the front-and-back sliding plate is installed by means of the sliding groove, and the up-and-down moving plate is installed by means of the installation groove. When in use, by lifting the handle upwards, the up-and-down moving plate is driven to move upwards, so that the clamping convex groove on the up-and-down moving plate is separated from the clamping concave groove on the front-and-back sliding plate. The operation is simple during use, improving the convenience of use of this backrest adjustment structure of the seat.

Description

Technical Field

[0001] The present invention relates to the technical field of seats, and specifically to a backrest adjustment structure for a seat. Background Art

[0002] A seat is a seating device with armrests and a backrest and an adjustable angle. With the competition in the market and the development of society, and the development of the industry, the functions of seats are gradually increasing. In order to meet the comfort of seats, the relatively complex backrests of seats are gradually designed to be adjustable. However, the existing seat backrest adjustment structures are traditional in structure, complex to use, and there are also defects during operation, and the operation steps are relatively inconvenient. Therefore, we propose a backrest adjustment structure for a seat. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a backrest adjustment structure for a seat, which solves the problems of the traditional seat backrest adjustment structure being complex in composition structure, inconvenient to operate, and poor in stability and easy to be damaged as mentioned in the above background art.

[0004] To achieve the purpose of the above backrest adjustment structure with simple structure, convenient operation and good stability, the present invention is realized through the following technical solutions: A backrest adjustment structure of a seat, including an armrest housing and a seat backrest. A connection surface is provided on one side of the armrest housing. A connection hole located on the connection surface is opened on one side of the armrest housing. A second limit groove communicated with the connection hole is opened on one side of the armrest housing. An arc-shaped limit groove is opened on one side of the armrest housing and penetrates through the armrest housing. A sliding groove is arranged in the inner cavity of the armrest housing. An installation groove is opened inside the armrest housing. A backrest rotation limit clamping seat is fixedly connected in the inner cavity of the armrest housing and is concentric with the connection hole. A buffer is installed in the inner cavity of the armrest housing. A cover plate is connected to the surface of the armrest housing. A front and rear sliding plate is slidably connected in the inner cavity of the sliding groove. A reset stop block is fixedly connected to one side of the front and rear sliding plate. A clamping groove is opened on the other side of the front and rear sliding plate. A through hole is opened on the surface of the front and rear sliding plate. A first spring connection seat is fixedly connected in the inner cavity of the sliding groove and extends into the inner cavity of the front and rear sliding plate. A first spring is fixedly connected to one side of the first spring connection seat, and the first spring is located in the inner cavity of the front and rear sliding plate and is fixedly connected to one end of the inner cavity of the front and rear sliding plate. An up and down moving plate is slidably installed in the inner cavity of the installation groove. A clamping convex groove is fixedly connected to the bottom of the up and down moving plate, and the clamping convex groove is adapted to the clamping groove. A second spring installation seat is installed in the inner cavity of the installation groove. A second spring is fixedly connected to one side of the second spring installation seat, and the second spring is located in the inner cavity of the up and down moving plate and is fixedly connected to one end of the inner cavity of the up and down moving plate. Side mounting surfaces are provided on both sides of the seat backrest. Mounting holes are opened on the side mounting surfaces. A moving column is installed in the inner cavity of the mounting hole. One end of the moving column penetrates through the arc-shaped limit groove and the inner cavity of the through hole. A positioning rod is installed on the side mounting surface. A limit sliding plate is fixedly connected to one side of the positioning rod. The positioning rod is sleeved into the inner cavity of the connection hole. The limit sliding plate extends into the inner cavity of the second limit groove. A fixed rotating shaft is installed in the inner cavity of the positioning rod, and the fixed rotating shaft extends into the inner cavity of the backrest rotation limit clamping seat.

[0005] Preferably, the reset stop block is in contact with one end of the buffer.

[0006] Preferably, a buckle is clamped on the surface of the cover plate, and an avoidance opening is opened at the top of the cover plate.

[0007] Preferably, a handle is installed on one side of the up and down moving plate. The handle penetrates through the avoidance opening and extends to the outside of the cover plate. Avoidance grooves are opened on both sides of the surface of the up and down moving plate.

[0008] Preferably, a sound-absorbing column is fixedly connected in the inner cavity of the installation groove, and one end of the sound-absorbing column penetrates through the inner cavity of the avoidance groove.

[0009] Preferably, a protective cover is installed by screws in the inner cavity of the armrest housing and above the front and rear sliding plates.

[0010] Preferably, an armrest is fixedly installed at the top of the armrest housing, and a seat cushion connecting base is fixedly installed at the bottom of the armrest housing.

[0011] The present invention provides a backrest adjustment structure for a seat, having the following beneficial effects:

[0012] 1. For the backrest adjustment structure of this seat, through the combined use of the armrest housing, the up and down moving plate, the front and rear sliding plates, the second spring, the first spring, the arc-shaped limiting groove, the moving column, and the fixed rotating shaft and the positioning rod, the front and rear sliding plates are installed by using the sliding groove, and the up and down moving plate is installed by using the installation groove. When in use, by lifting the handle upwards, the up and down moving plate is driven to move upwards, so that the clamping convex groove on the up and down moving plate is separated from the clamping concave groove on the front and rear sliding plates. When the back leans backwards, the seat back moves backwards under the pushing force. At this time, the moving column slides in the arc-shaped limiting groove, and then the moving column drives the front and rear sliding plates to slide backwards under the action of the through hole. The limiting sliding plate and the positioning rod will rotate in the inner cavities of the connecting hole and the second limiting groove. When reaching the appropriate position, release the handle. Since the second spring pulls the up and down moving plate, the up and down moving plate moves downwards to reset. At this time, the clamping convex groove at the bottom of the up and down moving plate is re-engaged with the clamping concave groove on the front and rear sliding plates to fix the seat back, achieving the purpose of adjusting the angle of the seat back. When restoring the position of the seat back, directly pull up the handle to separate the clamping convex groove on the up and down moving plate from the clamping concave groove on the front and rear sliding plates. Under the rebounding force of the first spring, the front and rear sliding plates drive the moving column to move, and then the seat back returns to its original position. The backrest adjustment structure of this seat is convenient to install, and the up and down moving plate and the front and rear sliding plates are conveniently reset by the second spring and the first spring. The operation is simple when in use, improving the use convenience of the backrest adjustment structure of this seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present invention;

[0014] Figure 2 is a schematic cross-sectional structural diagram of the side view of the present invention;

[0015] Figure 3 is an exploded structural diagram of a partial structure of the present invention;

[0016] Figure 4 is a three-dimensional structural diagram of the seat back of the present invention;

[0017] Figure 5 is a schematic front structural diagram of the present invention;

[0018] Figure 6 This is a schematic side view structure diagram of the seat back of the present invention;

[0019] Figure 7 This is a schematic structure diagram of the armrest housing of the present invention.

[0020] In the figure: 1. Armrest housing; 2. Up and down moving plate; 3. Front and back sliding plate; 4. Protection cover; 5. Cover plate; 6. Clamping plate; 7. Cushion connection base; 8. Buffer; 9. First spring connection seat; 10. Chair back rotation limit clamping seat; 11. Sliding groove; 12. Arc-shaped limit groove; 13. Installation groove; 14. Armrest; 15. Second spring installation seat; 16. Sound-absorbing column; 17. Handle; 18. Avoidance groove; 19. Through hole; 20. Clamping groove; 21. Clamping convex groove; 22. Reset block; 23. Avoidance opening; 24. Second spring; 25. First spring; 26. Seat back; 27. Side-mounted mounting surface; 28. Mounting hole; 29. Limit sliding plate; 30. Positioning rod; 31. Connection hole; 32. Second limit groove; 33. Connection surface; 34. Moving column; 35. Fixed rotation shaft. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Please refer to Figures 1 to 7, the present invention provides a technical solution: a backrest adjustment structure of a seat, including an armrest housing 1 and a seat backrest 26. A connecting surface 33 is provided on one side of the armrest housing 1. A connecting hole 31 located on the connecting surface 33 is provided on one side of the armrest housing 1. A second limiting groove 32 communicating with the connecting hole 31 is provided on one side of the armrest housing 1. An arc-shaped limiting groove 12 is provided on one side of the armrest housing 1, and the arc-shaped limiting groove 12 penetrates through the armrest housing 1. A sliding groove 11 is provided in the inner cavity of the armrest housing 1. An installation groove 13 is provided inside the armrest housing 1. A backrest rotation limiting clamping seat 10 is fixedly connected to the inner cavity of the armrest housing 1, and the backrest rotation limiting clamping seat 10 is concentric with the connecting hole 31. A buffer 8 is installed in the inner cavity of the armrest housing 1. A cover plate 5 is connected to the surface of the armrest housing 1. A front and rear sliding plate 3 is slidably connected to the inner cavity of the sliding groove 11. A reset blocking block 22 is fixedly connected to one side of the front and rear sliding plate 3. The reset blocking block 22 is in contact with one end of the buffer 8. Through the design of the reset blocking block 22 and the buffer 8, after the front and rear sliding plate 3 moves, to prevent the front and rear sliding plate 3 from quickly returning to its original position due to the excessive resilience of the first spring 25, which may cause the structure of the front and rear sliding plate 3 to be easily damaged. Therefore, a reset blocking block 22 is designed below the front and rear sliding plate 3. When the front and rear sliding plate 3 is reset under the action of the first spring 25, since the buffer 8 abuts against the reset blocking block 22, the front and rear sliding plate 3 is slowly restored to its original position, improving the stability of the backrest adjustment structure of the seat.

[0023] Wherein, a clamping groove 20 is provided on the other side of the front and rear sliding plate 3. A through hole 19 is provided on the surface of the front and rear sliding plate 3. A first spring connecting seat 9 is fixedly connected to the inner cavity of the sliding groove 11. The first spring connecting seat 9 extends into the inner cavity of the front and rear sliding plate 3. A first spring 25 is fixedly connected to one side of the first spring connecting seat 9. The first spring 25 is located in the inner cavity of the front and rear sliding plate 3 and is fixedly connected to one end of the inner cavity of the front and rear sliding plate 3. An up and down moving plate 2 is slidably installed in the inner cavity of the installation groove 13. A clamping convex groove 21 is fixedly connected to the bottom of the up and down moving plate 2, and the clamping convex groove 21 is adapted to the clamping groove 20. A second spring mounting seat 15 is installed in the inner cavity of the installation groove 13. A second spring 24 is fixedly connected to one side of the second spring mounting seat 15. The second spring 24 is located in the inner cavity of the up and down moving plate 2 and is fixedly connected to one end of the inner cavity of the up and down moving plate 2;

[0024] Among them, side mounting surfaces 27 are provided on both sides of the seat back 26. Mounting holes 28 are formed on the side mounting surfaces 27. A moving column 34 is installed in the inner cavity of the mounting hole 28. One end of the moving column 34 penetrates through the inner cavities of the arc-shaped limiting groove 12 and the through hole 19. A positioning rod 30 is installed on the side mounting surface 27. A limiting sliding plate 29 is fixedly connected to one side of the positioning rod 30. The positioning rod 30 is sleeved into the inner cavity of the connection hole 31. The limiting sliding plate 29 extends into the inner cavity of the second limiting groove 32. A fixed rotating shaft 35 is installed in the inner cavity of the positioning rod 30. One end of the fixed rotating shaft 35 extends into the inner cavity of the chair back rotation limiting clamping seat 10. The front and rear sliding plates 3 are installed by using the sliding groove 11, and the up and down moving plate 2 is installed by using the installation groove 13. When in use, by lifting the handle 17 upwards, the up and down moving plate 2 is driven to move upwards, so that the clamping convex groove 21 on the up and down moving plate 2 is separated from the clamping concave groove 20 on the front and rear sliding plates 3. When the back leans backwards, the seat back 26 moves backwards under the action of the acting force. At this time, the moving column 34 slides in the arc-shaped limiting groove 12, and then the moving column 34 drives the front and rear sliding plates 3 to slide backwards under the action of the through hole 19. The limiting sliding plate 29 and the positioning rod 30 rotate in the inner cavities of the connection hole 31 and the second limiting groove 32. When reaching an appropriate position, the handle 17 is released. Since the second spring 24 pulls the up and down moving plate 2, the up and down moving plate 2 moves downwards to reset. At this time, the clamping convex groove 21 at the bottom of the up and down moving plate 2 is re-engaged with the clamping concave groove 20 on the front and rear sliding plates 3 to fix the seat back 26, achieving the purpose of adjusting the angle of the seat back 26. When restoring the position of the seat back 26, the handle 17 is directly pulled up, so that the clamping convex groove 21 on the up and down moving plate 2 is separated from the clamping concave groove 20 on the front and rear sliding plates 3. Under the rebounding acting force of the first spring 25, the front and rear sliding plates 3 drive the moving column 34 to move, and then the seat back 26 is restored to its original position. The backrest adjustment structure of this seat is convenient to install. The up and down moving plate 2 and the front and rear sliding plates 3 are conveniently reset by the second spring 24 and the first spring 25. The operation is simple during use, improving the use convenience of the backrest adjustment structure of this seat.

[0025] Among them, a clamping plate 6 is clamped on the surface of the cover plate 5. An avoidance opening 23 is formed at the top of the cover plate 5. The handle 17 is avoided through the avoidance opening 23, so that the handle 17 can move up and down. A handle 17 is installed on one side of the up and down moving plate 2. The handle 17 penetrates through the avoidance opening 23 and extends to the outside of the cover plate 5. Avoidance grooves 18 are formed on both sides of the surface of the up and down moving plate 2. A sound-absorbing column 16 is fixedly connected to the inner cavity of the installation groove 13. One end of the sound-absorbing column 16 penetrates through the inner cavity of the avoidance groove 18. The up and down moving plate 2 can be conveniently moved through the handle 17.

[0026] Among them, a protective cover 4 is installed above the front and rear sliding plates 3 in the inner cavity of the armrest housing 1 by screws. The position of the front and rear sliding plates 3 is limited by the protective cover 4 to prevent the front and rear sliding plates 3 from falling off the inner cavity of the sliding groove 11. An armrest 14 is fixedly installed at the top of the armrest housing 1, and a seat cushion connection base 7 is fixedly installed at the bottom of the armrest housing 1. The armrest housing 1 and the seat cushion of the seat can be conveniently connected by bolts through the seat cushion connection base 7, enhancing the stability of the armrest housing 1 during use.

[0027] In summary, for the backrest adjustment structure of this seat, during use, first align and install the connection surface 33 on the armrest housing 1 with the side-mounted surface 27 on the side of the seat backrest 26, and then fix the seat cushion connection base 7 and the seat cushion of the seat with bolts. When adjusting the backrest of the seat, first hold the handle 17 and then lift the handle 17 upward, thereby driving the upper and lower moving plate 2 to move upward. At this time, the clamping convex groove 21 on the upper and lower moving plate 2 is separated from the clamping concave groove 20 on the front and rear sliding plates 3. Lean the back backward, and then the seat backrest 26 moves backward under the action of the force. At this time, the moving column 34 slides in the arc-shaped limiting groove 12, and at the same time, the moving column 34 drives the front and rear sliding plates 3 to slide backward under the action of the through hole 19. At the same time, the limiting sliding plate 29 and the positioning rod 30 rotate in the inner cavities of the connection hole 31 and the second limiting groove 32. When reaching the appropriate position, release the handle 17. Due to the second spring 24 pulling the upper and lower moving plate 2, the upper and lower moving plate 2 moves downward to reset. At this time, the clamping convex groove 21 at the bottom of the upper and lower moving plate 2 is re-engaged with the clamping concave groove 20 on the front and rear sliding plates 3 to fix the seat backrest 26, achieving the purpose of adjusting the angle of the seat backrest 26.

[0028] When it is necessary to restore the position of the seat backrest 26, directly pull up the handle 17 to separate the clamping convex groove 21 on the upper and lower moving plate 2 from the clamping concave groove 20 on the front and rear sliding plates 3. Under the rebounding force of the first spring 25, the front and rear sliding plates 3 drive the moving column 34 to move, thereby restoring the seat backrest 26 to its original position.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A backrest adjustment structure of a seat, comprising an armrest housing (1) and a seat backrest (26), characterized in that: One side of the armrest housing (1) is provided with a connection surface (33). A connection hole (31) is provided on the connection surface (33) on one side of the armrest housing (1). A second limiting groove (32) communicating with the connection hole (31) is provided on one side of the armrest housing (1). An arc-shaped limiting groove (12) is provided on one side of the armrest housing (1), and the arc-shaped limiting groove (12) penetrates through the armrest housing (1). A sliding groove (11) is provided in the inner cavity of the armrest housing (1). An installation groove (13) is provided inside the armrest housing (1). A chair back rotation limiting clamping seat (10) is fixedly connected in the inner cavity of the armrest housing (1), and the chair back rotation limiting clamping seat (10) is concentric with the connection hole (31). A cover plate (5) is connected to the surface of the armrest housing (1). A front and rear sliding plate (3) is slidably connected in the inner cavity of the sliding groove (11). A reset stop block (22) is fixedly connected to one side of the front and rear sliding plate (3). A clamping groove (20) is provided on the other side of the front and rear sliding plate (3). A through hole (19) is provided on the surface of the front and rear sliding plate (3). A first spring connection seat (9) is fixedly connected in the inner cavity of the sliding groove (11). The first spring connection seat (9) extends into the inner cavity of the front and rear sliding plate (3). A first spring (25) is fixedly connected to one side of the first spring connection seat (9), and the first spring (25) is located in the inner cavity of the front and rear sliding plate (3) and is fixedly connected to one end of the inner cavity of the front and rear sliding plate (3). An up and down moving plate (2) is slidably installed in the inner cavity of the installation groove (13). A clamping convex groove (21) is fixedly connected to the bottom of the up and down moving plate (2), and the clamping convex groove (21) is adapted to the clamping groove (20). A second spring installation seat (15) is installed in the inner cavity of the installation groove (13). A second spring (24) is fixedly connected to one side of the second spring installation seat (15). The second spring (24) is located in the inner cavity of the up and down moving plate (2) and is fixedly connected to one end of the inner cavity of the up and down moving plate (2). The second spring (24) and the first spring (25) facilitate the reset of the up and down moving plate (2) and the front and rear sliding plate (3). Side installation surfaces (27) are provided on both sides of the seat back (26). Installation holes (28) are provided on the side installation surfaces (27). A moving column (34) is installed in the inner cavity of the installation hole (28). One end of the moving column (34) penetrates through the arc-shaped limiting groove (12) and the inner cavity of the through hole (19). A positioning rod (30) is installed on the side installation surface (27). A limiting sliding plate (29) is fixedly connected to one side of the positioning rod (30). The positioning rod (30) is sleeved into the inner cavity of the connection hole (31). The limiting sliding plate (29) extends into the inner cavity of the second limiting groove (32). A fixed rotating shaft (35) is installed in the inner cavity of the positioning rod (30). The fixed rotating shaft (35) extends into the inner cavity of the chair back rotation limiting clamping seat (10); A buffer (8) is installed in the inner cavity of the armrest housing (1), and the reset stop block (22) is in contact with one end of the buffer (8). A buckle plate (6) is snap-connected to the surface of the cover plate (5), and an avoidance opening (23) is formed at the top of the cover plate (5).

2. The backrest adjustment structure of a seat according to claim 1, wherein: A handle (17) is installed on one side of the vertically movable plate (2). The handle (17) passes through the avoidance opening (23) and extends to the outside of the cover plate (5). Avoidance grooves (18) are formed on both sides of the surface of the vertically movable plate (2).

3. The backrest adjustment structure of a seat according to claim 1, characterized in that: A sound-absorbing column (16) is fixedly connected to the inner cavity of the installation groove (13), and one end of the sound-absorbing column (16) passes through the inner cavity of the avoidance groove (18).

4. The backrest adjustment structure of a seat according to claim 1, wherein: A protective cover (4) is installed by screws in the inner cavity of the armrest housing (1) and above the front and rear sliding plates (3).

5. The backrest adjustment structure of a seat according to claim 1, characterized in that: An armrest (14) is fixedly installed at the top of the armrest housing (1), and a seat cushion connection base (7) is fixedly installed at the bottom of the armrest housing (1).

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