Backrest and cushion connecting structure and seat

Abstract

The utility model relates to a backrest and cushion connecting structure and chair, including backrest and cushion, and the cushion includes cushion framework, support plate and flexible cushion layer, and the cushion framework includes seat plate and tail plate, and the back of tail plate constructs and installs the groove, so that the front end of tail plate is equipped with the connecting mesa, and the bottom surface of assembly groove is equipped with a plurality of support seats, a L shape connecting plate includes riser, horizontal plate and arc plate, and the connecting mesa, riser and backrest correspond and are equipped with a plurality of first connecting holes, so that tail plate, riser and backrest are fixedly connected by screwing bolt on first connecting hole, support seat, horizontal plate and support plate correspond and are equipped with second connecting hole, so that seat plate, horizontal plate and support plate are fixedly connected by screwing bolt on second connecting hole. In the above scheme, when the user leans back and acts on the tail plate, part of the force acts on the connecting plate, and the connecting plate disperses the load stress, thereby effectively preventing the tail plate from breaking under stress, and improving the durability and safety of the chair.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and in particular to a backrest and seat cushion connection structure and a seat. Background Technology

[0002] Seating is widely used in all aspects of people's lives. Depending on the place of use, seating includes office chairs, car seats, conference chairs, etc. The backrest is one of the important components of a chair, providing comfort for the back. Most existing chair backrests are designed to recline to provide a comfortable lying position. The backrest is usually connected to the back of the seat cushion, forming a tailboard. For example, Chinese utility model patent CN223503917U discloses a chair component and a chair, wherein the chair component includes a seat with a first support portion, the first support portion extending upward to form a second support portion; the chair component with its lower end hinged to the second support portion, and a mounting seat on its rear side; and an elastic member with one end connected to the mounting seat and the other end abutting against the second support portion. The lower end of the chair component is hinged to the second support, allowing the upper part of the chair component to rotate relative to the seat. An elastic element is installed between the mounting seat on the rear side of the chair component and the second support to increase the cushioning when the chair component rotates backward and to provide a restoring effect. During prolonged sitting, by leaning back against the chair component and reclining, the upper part of the chair component rotates backward, and the elastic element provides cushioning, slowing down the speed and amplitude of reclining and improving comfort. Furthermore, the entire chair back structure is simple, easy to assemble and disassemble, and reduces production costs.

[0003] In the above solution, the second support of the seat extends upward and connects to the lower part of the backrest. The second support and the lower part of the backrest are only hinged by a hinge seat. The upper part of the second support is connected to the backrest through a guide plate and a guide groove. This assembly structure has the problem of low connection strength of the second support. When the user leans back and acts on the backrest, the backrest squeezes the second support, which makes the second support risk breaking and affects the service life of the seat. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a backrest and seat cushion connection structure. By adding an L-shaped connecting plate to the backrest, tailboard, and seat, and then providing a reinforcing plate on the surface of the L-shaped connecting plate, the strength of the tailboard connection structure is effectively improved, preventing the tailboard from breaking under stress and extending the service life of the seat. A second objective of this utility model is to provide a seat with the aforementioned backrest and seat cushion connection structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A backrest and seat cushion connection structure includes a backrest and a seat cushion. The seat cushion includes a seat cushion frame, a support plate disposed on the seat cushion frame, and a flexible padding layer disposed on the support plate. The seat cushion frame includes an integrally formed seat plate and a tail plate, with the tail plate longitudinally formed at the rear end of the seat plate and a rounded transition between them. The characteristic feature is that:

[0007] The upper end of the seat plate has an assembly groove extending to the tail plate; the back of the tail plate has an installation groove, so that the front end of the tail plate protrudes into the assembly groove to form a longitudinally arranged connecting platform. A cover plate is provided on the outside of the installation groove; multiple support seats are provided on the bottom surface of the assembly groove at the rear side of the seat plate. An L-shaped connecting plate includes an integrally formed vertical plate, a horizontal plate, and an arc plate connecting the vertical plate and the horizontal plate. The vertical plate is attached to the connecting platform. Multiple first connecting holes are correspondingly opened on the connecting platform, the vertical plate, and the backrest. The tail plate, the vertical plate, and the backrest are fixedly connected by screwing bolts into the first connecting holes.

[0008] The support base, the horizontal plate, and the support plate are respectively provided with second connecting holes, so that the support base, the horizontal plate, and the support plate can be fixedly connected by screwing bolts into the second connecting holes.

[0009] In the above technical solution, the seat frame includes a seat plate and a tail plate. The tail plate extends upward and connects to the lower back of the backrest. An L-shaped connecting plate is installed on the backrest, tail plate, and seat plate. One vertical plate of the L-shaped connecting plate connects the tail plate and the backrest, and the other horizontal plate connects the seat plate and the support plate. This not only effectively improves the structural strength of the tail plate, making it less prone to breakage, but also distributes some of the force when the user leans back on the tail plate, thus preventing the tail plate from breaking under stress and improving the durability and safety of the seat.

[0010] Preferably, the connecting platform and the vertical plate are provided with a plurality of first fixing holes, and a portion of the support base and the horizontal plate are provided with a plurality of second fixing holes.

[0011] Preferably, the upper end of the connecting plate is recessed downward to form a groove and the lower end of the connecting plate forms a convex wall, the groove extending from the arc plate to the horizontal plate.

[0012] Preferably, the plate also includes a reinforcing sheet, which is attached to the outer end face of the vertical plate and has a third connecting hole corresponding to the first connecting hole.

[0013] Preferably, the upper end and the outer edges of the vertical plates on both sides of the reinforcing plate are provided with multiple mounting holes corresponding to the backrest.

[0014] Preferably, the plate also includes an anti-detachment plate. Multiple connecting posts are provided on both sides of the connecting plate in the assembly groove. A connecting piece extends from the anti-detachment plate and is fixed to the multiple connecting posts. The anti-detachment plate includes at least a pressure plate for pressing against the connection between the arc-shaped plate and the horizontal plate.

[0015] Preferably, the anti-detachment plate further includes a mating plate formed on the upper end of the pressure plate, the mating plate being located outside the arc-shaped plate and abutting against the lower inner side of the backrest; the outer edge of the anti-detachment plate extends and abuts against the inner edge of the assembly groove.

[0016] Preferably, the bottom surface of the assembly groove is provided with a boss on the seat plate, and the boss and the support plate are provided with a plurality of assembly holes. The support seat on the front side is connected to the rear inclined surface of the boss, the front end of the horizontal plate abuts against the inclined surface, and the upper end of the horizontal plate is flush with the upper end of the boss.

[0017] Preferably, the bottom surface of the mounting groove is provided with multiple locking holes, and the inner side of the cover plate is provided with buckles that connect with the multiple locking holes.

[0018] A type of seat, characterized in that it includes a backrest and seat cushion connection structure as described in any one of the above-mentioned methods.

[0019] The present invention adopts the above technical solution and has the following technical effects:

[0020] The seat frame includes a seat plate and a tail plate. The tail plate extends upwards and connects to the lower back of the backrest. An L-shaped connecting plate is installed between the backrest, tail plate, and seat plate. One vertical plate of the L-shaped connecting plate connects the tail plate and the backrest, while the other horizontal plate connects the seat plate and the support plate. This not only effectively improves the structural strength of the tail plate, making it less prone to breakage, but also distributes some of the force when the user leans back on the tail plate, thus preventing the tail plate from breaking under stress and improving the durability and safety of the seat.

[0021] Meanwhile, a reinforcing plate is installed between the vertical plate of the L-shaped connecting plate and the backrest. The reinforcing plate connects the backrest, the tail plate and the L-shaped connecting plate. The reinforcing plate further improves the structural strength of the tail plate, making the tail plate and the L-shaped connecting plate extremely difficult to break. At the same time, it improves the connection strength between the tail plate and the backrest, enhances the connection firmness and stability between the backrest and the seat cushion, and extends the service life of the seat. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the assembly of the backrest and seat cushion.

[0023] Figure 2 This is a schematic diagram showing the exploded structure of the seat cushion.

[0024] Figure 3This is a schematic diagram showing the installation of the support plate on the seat cushion frame.

[0025] Figure 4 A schematic diagram showing the installation of L-shaped connecting pieces and reinforcing pieces on the seat cushion frame.

[0026] Figure 5 This is a schematic diagram showing the arrangement of the mounting slots on the back of the tailgate.

[0027] Figure 6 A schematic diagram of installing an L-shaped connecting piece between the tailplate and the seat plate.

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the L-shaped connecting piece.

[0029] Figure 8 This is a three-dimensional structural diagram of the L-shaped connecting piece from another perspective.

[0030] Figure 9 This is a schematic diagram showing the arrangement of the connecting platform and support base on the seat cushion frame.

[0031] Figure 10 This is a schematic diagram of the assembly of the reinforcing plate and the backrest.

[0032] Figure 11 This is a schematic diagram of the three-dimensional structure of the reinforcing plate.

[0033] Figure 12 A three-dimensional structural diagram of the anti-detachment plate.

[0034] Figure 13 This is a schematic diagram of the three-dimensional structure of the cover plate. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] like Figures 1-13 The illustrated backrest and seat cushion connection structure includes a backrest 1 and a seat cushion 2. The seat cushion 2 includes a seat cushion frame 3, a support plate 4 disposed on the seat cushion frame 3, and a flexible padding layer 5 disposed on the support plate 4. The seat cushion frame 3 includes an integrally formed seat plate 6 and a tail plate 7. The tail plate 7 is longitudinally formed at the rear end of the seat plate 6, and there is an arc transition between them. The upper end of the seat plate 6 has a mounting groove 8 extending to the tail plate 7. The back of the tail plate 7 has an installation groove 9, so that the front end of the tail plate 7 protrudes into the mounting groove 8 to form a longitudinally arranged connection. The tabletop 10 and the outer side of the mounting groove 9 are provided with a cover plate 35; the bottom surface of the mounting groove 8 is provided with multiple support seats 11 on the rear side of the seat plate 6; an L-shaped connecting plate 12 includes an integrally formed vertical plate 13, a horizontal plate 14 and an arc plate 15 connecting the vertical plate 13 and the horizontal plate 14; the vertical plate 13 is attached to the connecting tabletop 10; multiple first connecting holes 16 are correspondingly opened on the connecting tabletop 10, the vertical plate 13 and the backrest 1; the tail plate 7, the vertical plate 13 and the backrest 1 are fixedly connected by screwing bolts into the first connecting holes 16.

[0041] The support base 11, the horizontal plate 14 and the support plate 4 are respectively provided with second connecting holes 17, so that the seat plate 6, the horizontal plate 14 and the support plate 4 can be fixedly connected by screwing bolts into the second connecting holes 17.

[0042] In the above technical solution, the seat frame includes an integrally molded seat plate and a tail plate. The tail plate extends upward and connects to the lower back of the backrest. An L-shaped connecting plate is installed on the backrest, tail plate, and seat plate. One vertical plate of the L-shaped connecting plate connects the tail plate and the backrest, i.e., four bolts are screwed into the tail plate, vertical plate, and backrest for fixed connection. The other horizontal plate connects the seat plate and the support plate, i.e., four bolts are screwed into the seat plate (support seat), horizontal plate, and support plate for fixed connection. This not only effectively improves the structural strength of the tail plate, making it less prone to breakage, but also, when the user leans back and acts on the tail plate, part of the force is applied to the L-shaped connecting plate. The connecting plate disperses the load stress and reduces the bending moment borne by the tail plate, thereby effectively preventing the tail plate from breaking under stress and improving the durability and safety of the seat.

[0043] In addition, the L-shaped connecting plate is transitioned by an arc-shaped plate in the middle, resulting in better overall toughness.

[0044] Furthermore, the connecting platform 10 and the vertical plate 13 are respectively provided with a plurality of first fixing holes 18, and a portion of the support base 11 and the horizontal plate 14 are respectively provided with a plurality of second fixing holes 19. In this technical solution, the setting of the first fixing holes and the second fixing holes provides additional fixing points, enhances the connection strength between the cushion frame and the connecting plate, further prevents the connectors from loosening, and improves the reliability and durability of the structure. At the same time, it enables the pre-installation of the cushion frame and the connecting plate, providing convenience for subsequent connection with the backrest and support plate.

[0045] Furthermore, the upper end of the connecting plate 12 is recessed downward to form a groove 20, and the lower end of the connecting plate 12 forms a convex wall 21. The groove 20 extends from the arc-shaped plate 15 to the horizontal plate 14. In this technical solution, the groove improves the flexibility and fatigue resistance of the connecting plate, making it easier to bend and thus extending its service life.

[0046] Furthermore, the structure also includes a reinforcing plate 22, which is attached to the outer end face of the vertical plate 13. The reinforcing plate 22 has a third connecting hole 23 corresponding to the first connecting hole 16. In this technical solution, the reinforcing plate connects the backrest, tail plate, and L-shaped connecting plate, further improving the structural strength at the tail plate and making the tail plate and L-shaped connecting plate extremely difficult to break.

[0047] This further improves the tailgate's resistance to breakage.

[0048] Furthermore, the upper end and the outer edges of the vertical plates 13 on both sides of the reinforcing plate 22 are provided with multiple mounting holes 24 corresponding to the backrest 1. In this technical solution, the reinforcing plate is first fixed to the backrest by bolts inserted into the four mounting holes, and then the tail plate, connecting plate and backrest are fixed together by the correspondence of the first connecting hole and the third connecting hole. This indirectly improves the connection strength between the tail plate and the backrest, enhances the connection firmness and stability between the backrest and the seat cushion, and extends the service life of the seat.

[0049] Furthermore, the structure also includes an anti-detachment plate 25. Multiple connecting posts 26 are provided on both sides of the connecting plate 12 within the assembly groove 8. A connecting piece 27 extends from the anti-detachment plate 25 and is fixed to the multiple connecting posts 26. This piece includes at least a pressure plate 28 for pressing against the connection between the arc-shaped plate 15 and the horizontal plate 14. In this technical solution, the anti-detachment plate is fixed by the four connecting posts and the connecting piece. The pressure plate on the anti-detachment plate at the connection between the arc-shaped plate and the horizontal plate prevents the connecting plate from detaching, thereby improving the stability of the connecting plate.

[0050] Furthermore, the anti-detachment plate 25 also includes a mating plate 29 formed on the upper end of the pressure plate 28. The mating plate 29 is located outside the arc-shaped plate 15 and abuts against the lower inner side of the backrest 1; the outer edge of the anti-detachment plate 25 extends and abuts against the inner edge of the mounting groove 8. In this technical solution, the extended mating plate improves the overall structural strength and covers the rear side of the seat, making it simpler and more aesthetically pleasing. In addition, the mating plate fits against the lower part of the backrest, playing a certain limiting role and preventing the backrest from wobbling.

[0051] Furthermore, a boss 30 is constructed on the bottom surface of the mounting groove 8 on the seat plate 6. The boss 30 and the support plate 4 are respectively provided with multiple mounting holes 31. The support seat 11 at the front is connected to the rear inclined surface 32 of the boss 30. The front end of the horizontal plate 14 abuts against the inclined surface 32, and the upper end of the horizontal plate 14 is flush with the upper end of the boss 30. In this technical solution, the boss enhances the structural strength of the seat cushion frame, and the boss abuts against the front end of the connecting plate, providing a certain limiting effect and preventing the connecting plate from moving forward.

[0052] Furthermore, the bottom surface of the mounting groove 9 is provided with multiple locking holes 33, and the inner side of the cover plate 35 is provided with buckles 34 that connect with the multiple locking holes 33. In this technical solution, the locking holes on the bottom surface of the mounting groove and the buckles on the inner side of the cover plate facilitate the installation and removal of the cover plate, protect the internal connection structure from dust or damage, and ensure that the cover plate is reliably fixed and easy to maintain.

[0053] This solution also discloses a seat, including the aforementioned backrest and seat cushion connection structure.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A backrest and seat cushion connection structure, comprising a backrest (1) and a seat cushion (2), the seat cushion (2) comprising a seat cushion frame (3), a support plate (4) disposed on the seat cushion frame (3), and a flexible pad layer (5) disposed on the support plate (4), the seat cushion frame (3) comprising an integrally formed seat plate (6) and a tail plate (7), the tail plate (7) being longitudinally formed at the rear end of the seat plate (6) and there being a rounded transition between them; characterized in that: The upper end of the seat plate (6) is provided with an assembly groove (8) extending to the tail plate (7); the back of the tail plate (7) is provided with an installation groove (9), so that the front end of the tail plate (7) protrudes into the assembly groove (8) to form a longitudinally arranged connecting platform (10), and a cover plate (35) is provided on the outside of the installation groove (9); multiple support seats (11) are provided on the bottom surface of the assembly groove (8) on the rear side of the seat plate (6), and an L-shaped connecting plate (12) includes an integrally formed vertical plate (13), a horizontal plate (14) and an arc plate (15) connecting the vertical plate (13) and the horizontal plate (14). The vertical plate (13) is attached to the connecting platform (10), and multiple first connecting holes (16) are correspondingly opened on the connecting platform (10), the vertical plate (13) and the backrest (1), so that the tail plate (7), the vertical plate (13) and the backrest (1) are fixedly connected by screwing bolts into the first connecting holes (16); The support base (11), the horizontal plate (14) and the support plate (4) are respectively provided with second connecting holes (17), so that the seat plate (6), the horizontal plate (14) and the support plate (4) can be fixedly connected by screwing bolts into the second connecting holes (17).

2. The backrest and seat cushion connection structure according to claim 1, characterized in that: The connecting platform (10) and the vertical plate (13) are provided with a plurality of first fixing holes (18), and the supporting base (11) and the horizontal plate (14) are provided with a plurality of second fixing holes (19).

3. The backrest and seat cushion connection structure according to claim 2, characterized in that: The upper end of the connecting plate (12) is recessed downward to form a groove (20) and a convex wall (21) is formed at the lower end of the connecting plate (12). The groove (20) extends from the arc plate (15) to the horizontal plate (14).

4. The backrest and seat cushion connection structure according to claim 1, characterized in that: It also includes a reinforcing plate (22), which is attached to the outer end face of the vertical plate (13), and a third connecting hole (23) corresponding to the first connecting hole (16) is provided on the reinforcing plate (22).

5. The backrest and seat cushion connection structure according to claim 4, characterized in that: The upper end of the reinforcing plate (22) and the outer edges of the vertical plates (13) on both sides are provided with multiple mounting holes (24) corresponding to the backrest (1).

6. The backrest and seat cushion connection structure according to claim 1, characterized in that: It also includes an anti-detachment plate (25), and multiple connecting posts (26) are provided on both sides of the connecting plate (12) in the assembly groove (8). A connecting piece (27) is provided on the anti-detachment plate (25) and fixed to the multiple connecting posts (26). It includes at least a pressure plate (28) for pressing on the connection between the arc plate (15) and the horizontal plate (14).

7. The backrest and seat cushion connection structure according to claim 6, characterized in that: The anti-detachment plate (25) also includes a mating plate (29) formed on the upper end of the pressure plate (28). The mating plate (29) is located outside the arc plate (15) and abuts against the lower inner side of the backrest (1). The outer edge of the anti-detachment plate (25) extends and abuts against the inner edge of the mounting groove (8).

8. The backrest and seat cushion connection structure according to claim 2, characterized in that: The bottom surface of the assembly groove (8) is provided with a boss (30) on the seat plate (6). The boss (30) and the support plate (4) are provided with a plurality of assembly holes (31). The support seat (11) on the front side is connected to the rear inclined surface (32) of the boss (30). The front end of the horizontal plate (14) abuts against the inclined surface (32). The upper end of the horizontal plate (14) is flush with the upper end of the boss (30).

9. The backrest and seat cushion connection structure according to claim 1, characterized in that: The bottom surface of the mounting groove (9) is provided with multiple locking holes (33), and the inner side of the cover plate (35) is provided with buckles (34) that connect with the multiple locking holes (33).

10. A type of seat, characterized in that: Includes a backrest and seat cushion connection structure as described in any one of claims 1 to 9.

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