Backrest structure and seat

Abstract

The utility model provides a backrest structure and a seat. The backrest structure comprises a pair of backrest side plates, a pair of cushion blocks and a pair of seat frame connecting pieces, the cushion blocks are assembled to the inner sides of the backrest side plates, each cushion block comprises a side wall extending in the inside-outside direction, a mounting part and a supporting part, the mounting parts and the supporting parts are arranged on the two opposite sides of the side wall, and the seat frame connecting pieces are connected with the mounting parts. And the backrest side plate is selectively fixed on the mounting part or the supporting part. According to the backrest structure and the seat, the assembly efficiency can be improved, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of furniture, and particularly to a backrest structure and a seating furniture. Background Art

[0002] Existing sofas are often designed with multiple functions, and the sofa seat frame is designed with functional positions and fixed positions of specific widths. The width of the installation position is relatively narrow and is used to implement different functions of the seating furniture. While the width of the fixed position is relatively wide and is used to provide a larger support area to increase the stability and comfort of the seating furniture.

[0003] In order to match different seat frame structures, the backrest structure also needs to be designed differently. Especially when the seat frames of the functional positions and the fixed positions appear on a set of sofas, it is usually necessary to design two different backrest structures for matching. This makes the overall structure of the sofa complex, with many assembly processes and high costs.

[0004] Therefore, it is necessary to provide an improved backrest structure and seating furniture to solve the above problems. Utility Model Content

[0005] This application provides a backrest structure and a seating furniture that improve assembly efficiency and reduce costs.

[0006] This application discloses a backrest structure, including a pair of backrest side plates, a pair of cushion blocks and a pair of seat frame connectors. The cushion blocks are assembled to the inner sides of the backrest side plates. The cushion blocks include side walls extending in the inner and outer directions, and an installation portion and a support portion provided on opposite sides of the side walls. The seat frame connectors are connected to the installation portions, and the backrest side plates can be selectively fixed to the installation portions or the support portions.

[0007] Further, the installation portion is provided with a first fixing portion, the support portion is provided with a second fixing portion, and corresponding fixing holes are provided on the backrest side plates. The fixing holes can be selectively cooperated with the first fixing portion or the second fixing portion through fasteners to fix the cushion blocks to the backrest side plates.

[0008] Further, both the first fixing portion and the second fixing portion are tubularly arranged and connected as a whole; an inwardly protruding sink is provided on the backrest side plates, and the fixing holes are provided on the sink.

[0009] Further, the number of both the first fixing portion and the second fixing portion is two. Both of the two first fixing portions are provided on the side walls and located on the front and rear sides of the side walls. Both of the two second fixing portions are provided on the side walls and located on the front and rear sides of the side walls.

[0010] Further, the materials of the backrest side plates and the cushion blocks are both plastics, and the material of the seat frame connectors is plastics or metal.

[0011] Further, the mounting portion is provided with a receiving groove and an elastic buckle protruding into the receiving groove. An opening is formed below the receiving groove. The seat frame connecting member includes a backrest connecting portion extending into the receiving groove from the opening, and the backrest connecting portion is snap-connected to the elastic buckle.

[0012] Further, the mounting portion further includes a first limiting plate and a second limiting plate parallel to the backrest side plate. The first limiting plate and the second limiting plate are respectively connected to the side wall and are located on opposite sides of the receiving groove, and the elastic buckle is arranged on the first limiting plate or the second limiting plate.

[0013] Further, the first limiting plate is located on the side close to the supporting portion. The elastic buckle includes an arm portion and a hook portion. The upper and lower ends of the arm portion are respectively connected to the first limiting plate and the hook portion. An opening cooperating with the elastic buckle is arranged on the backrest connecting portion, and the hook portion is located within the opening.

[0014] Further, a profiling limiting rib is arranged on the inner side of the backrest side plate, and the profiling limiting rib is arranged along the outer edge of the cushion block.

[0015] Further, the cushion block is further provided with a plurality of supporting walls perpendicular to the side wall, and one end of the supporting wall far from the side wall contacts the profiling limiting rib.

[0016] Further, a cavity is formed within the supporting portion, and a plurality of positioning ribs are arranged within the cavity. The positioning ribs extend from the side of the supporting portion close to the mounting portion to the side far from the mounting portion in the inner and outer directions.

[0017] The present application also discloses a seat, including a seat frame structure and the backrest structure as described above. The seat frame connecting member includes a seat frame connecting portion, and the seat frame connecting portion is fixed to the seat frame structure.

[0018] By arranging the mounting portion and the supporting portion on the cushion block, connecting the seat frame connecting member to the mounting portion, and enabling the backrest side plate to be selectively fixed to the mounting portion or the supporting portion, the backrest structure and the seat of the present application can connect both sides of the cushion block to the backrest side plate, such that the seat frame connecting member has two mounting positions, close to the backrest side plate and far from the backrest side plate, which can take into account cooperation with two different widths of seat frame structures, realize convenient assembly and flexible switching between the functional position and the fixed position of the seat, improve the assembly efficiency while reducing the manufacturing cost.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. Description of the Drawings

[0020] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this specification and used together with the specification to explain the principles of this specification.

[0021] Figure 1 It is a front view when the backrest side plate of the backrest structure of this application is fixed to the installation part.

[0022] Figure 2 It is Figure 1 A partial perspective view of the inner side of the middle backrest structure.

[0023] Figure 3 It is Figure 1 A partial perspective view of the outer side of the middle backrest structure.

[0024] Figure 4 It is a front view when the backrest side plate of the backrest structure of this application is fixed to the support part.

[0025] Figure 5 It is Figure 4 A partial perspective view of the inner side of the middle backrest structure.

[0026] Figure 6 It is a perspective view of one side of the installation part of the cushion block of this application.

[0027] Figure 7 It is a perspective view of one side of the support part of the cushion block of this application.

[0028] Figure 8 It is a perspective view of the inner side of the backrest side plate of this application.

[0029] Figure 9 It is a side view of the seat frame connecting piece of this application.

[0030] Explanation of the reference numerals in the drawings: 10, backrest side plate; 11, profiling limiting rib; 12, fixing hole; 13, counterbore; 20, cushion block; 21, side wall; 22, installation part; 221, receiving groove; 2211, opening; 222, elastic buckle; 2221, arm part; 2222, hook part; 223, first limiting plate; 224, second limiting plate; 23, support part; 231, cavity; 232, positioning rib; 24, support wall; 251, first fixing part; 252, second fixing part; 30, seat frame connecting piece; 31, backrest connecting part; 32, seat frame connecting part; 311, opening hole. Detailed implementation manners

[0031] Here, the technical solutions in the embodiments (or "implementation manners") of this application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If there are terms related to directional indication or positional relationship in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial direction, radial direction, circumferential direction, etc.), such terms are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, terms such as "first" and "second" in the embodiments of the present application are only for the purpose of convenient description and cannot be construed as indicating or implying relative importance.

[0033] Next, the embodiments of the present application will be described in detail.

[0034] As Figures 1 to 5 shown, the present application provides a backrest structure, which includes a pair of backrest side plates 10, a pair of cushion blocks 20 and a pair of seat frame connectors 30. The cushion blocks 20 are assembled to the inner sides of the backrest side plates 10, and the seat frame connectors 30 are assembled to the cushion blocks 20. The backrest side plates 10 are connected to a seat frame structure (not shown in the figure) through the seat frame connectors 30 to fix the backrest structure on the seat frame structure.

[0035] As Figure 6 shown, the cushion block 20 includes a side wall 21, a mounting portion 22 and a supporting portion 23. The side wall 21 extends in the inner and outer directions, and the mounting portion 22 and the supporting portion 23 are respectively arranged on opposite sides of the side wall 21. The seat frame connector 30 is connected to the mounting portion 22.

[0036] The mounting portion 22 is provided with a receiving groove 221, an elastic buckle 222, a first limiting plate 223 and a second limiting plate 224. Both the first limiting plate 223 and the second limiting plate 224 are parallel to the backrest side plate 10 and are both connected to the side wall 21. The first limiting plate 223 and the second limiting plate 224 are respectively located on opposite sides of the receiving groove 221.

[0037] In this embodiment, the first limiting plate 223 is located on the side close to the supporting portion 23, and the second limiting plate 224 is located on the side far from the supporting portion 23. The side wall 21, the first limiting plate 223 and the second limiting plate 224 together enclose the receiving groove 221. An opening 2211 is formed below the receiving groove 221, and the seat frame connector 30 extends into the receiving groove 221 from the opening 2211.

[0038] The elastic buckle 222 is arranged on the first limiting plate 223 or the second limiting plate 224. The elastic buckle 222 protrudes into the receiving groove 221 and is in snap-fit connection with the seat frame connecting piece 30. The elastic buckle 222 includes an arm portion 2221 and a hook portion 2222. In this embodiment, the upper and lower ends of the arm portion 2221 are respectively connected to the first limiting plate 223 and the hook portion 2222, and can be elastically deformed in the inner and outer directions. The hook portion 2222 extends from the arm portion 2221 into the receiving groove 221 and is in snap-fit connection with the seat frame connecting piece 30.

[0039] Specifically, the hook portion 2222 includes a horizontally arranged top surface and an inclined guiding surface. The guiding surface is gradually inclined upward from the side far away from the receiving groove 221 to the side close to the receiving groove 221. Please also refer to Figure 9 , an opening 311 for snap-connecting with the elastic buckle 222 is arranged on the seat frame connecting piece 30. When the backrest structure is snap-connected with the seat frame connecting piece 30, the hook portion 2222 is located in the opening 311. The top surface of the hook portion 2222 abuts against the top wall of the opening 311, so that the seat frame connecting piece 30 will not break away from the elastic buckle 222.

[0040] In this embodiment, the elastic buckle 222 is arranged on the first limiting plate 223. The arm portion 2221 and the first limiting plate 223 limit the seat frame connecting piece 30 from one side in the inner and outer directions at the same time, and the second limiting plate 224 limits the seat frame connecting piece 30 from the other side in the inner and outer directions. The side wall 21 limits the seat frame connecting piece 30 on the front and rear sides and the upper side, and the hook portion 2222 limits the seat frame connecting piece 30 on the lower side.

[0041] As Figure 7 shown, a cavity 231 is formed in the support portion 23. The first limiting plate 223 and the side wall 21 jointly enclose the cavity 231, and the cavity 231 communicates with the side of the cushion block 20 far away from the installation portion 22. By arranging the cavity 231 inside the support portion 23, on the one hand, the weight of the cushion block 20 can be reduced, which is convenient for transportation during the production and assembly processes and improves the assembly efficiency; on the other hand, the material usage can be reduced and the manufacturing cost can be saved.

[0042] A plurality of positioning ribs 232 are arranged in the cavity 231. In the inner and outer directions, the positioning ribs 232 extend from the side of the support portion 23 close to the installation portion 22 to the side far away from the installation portion 22, and one end of the positioning rib 232 is connected to the first limiting plate 223. Along the up and down directions and the front and rear directions, the two ends of the positioning rib 232 are respectively connected to the side wall 21. The plurality of positioning ribs 232 are arranged in a staggered manner to improve the structural strength of the cushion block 20, provide better support and stability, and effectively avoid deformation of the cushion block 20.

[0043] The backrest side plate 10 can be selectively fixed to the mounting portion 22 or the supporting portion 23. It can be understood that the seat frame structure of the seat has two design modes, namely the functional position and the fixed position, and the functional position and the fixed position have different opening dimensions. Correspondingly, the seat frame connecting member 30 also has two mounting positions, relatively inward and relatively outward. By selectively connecting the backrest side plate 10 to the mounting portion 22 or the supporting portion 23, the backrest structure can take into account the connection with the seat frame connecting members 30 at two different positions, and thus realize the connection with the two seat frame structures.

[0044] Specifically, as Figures 1 to 3 shown, when the supporting portion 23 is fixed on the backrest side plate 10, the distance between the two seat frame connecting members 30 on the same seat is smaller, and it can be matched with the seat frame structure in the functional position. As Figure 4 and Figure 5 shown, when the mounting portion 22 is fixed on the backrest side plate 10, the distance between the seat frame connecting members 30 on the same seat is larger, and it can be matched with the seat frame structure in the fixed position.

[0045] Both the inner and outer sides of the cushion block 20 of the backrest structure of the present application can be connected to the backrest side plate 10. When assembling the backrest side plate 10 and the cushion block 20, only the installation orientation of the cushion block 20 needs to be adjusted according to the matching seat frame type, which simplifies the assembly process, improves the installation efficiency, and is convenient for design and transportation.

[0046] As Figures 6 to 8 shown, the mounting portion 22 is provided with a first fixing portion 251, the supporting portion 23 is provided with a second fixing portion 252, and a fixing hole 12 is correspondingly provided on the backrest side plate 10. The fixing hole 12 can be selectively matched with the first fixing portion 251 or the second fixing portion 252 through a fastener (not shown in the figure) to fix the cushion block 20 to the backrest side plate 10. Threads are provided inside both the first fixing portion 251 and the second fixing portion 252 to cooperate with the fastener.

[0047] Both the first fixing portion 251 and the second fixing portion 252 are tubularly arranged and communicate with each other. The number of both the first fixing portion 251 and the second fixing portion 252 is two. The two first fixing portions 251 are both provided on the side wall 21 and located on the front and rear sides of the side wall 21. The two second fixing portions 252 are both provided on the side wall 21 and located on the front and rear sides of the side wall 21.

[0048] It can be understood that connection pipes penetrating in the inner and outer directions are provided on both the front and rear sides of the side wall 21. One end close to the mounting portion 22 forms the first fixing portion 251, and one end close to the supporting portion 23 forms the second fixing portion 252.

[0049] The fixing hole 12 penetrates through the backrest side plate 10 in the inner and outer directions, and the fastener sequentially passes through the backrest side plate 10 and the cushion block 20 from the inside to the outside. A counterbore 13 protruding inwards is provided on the outer side of the backrest side plate 10, and the fixing hole 12 is arranged on the counterbore 13. In this way, when the backrest side plate 10 and the cushion block 20 are connected by the fastener, the fastener will not protrude from the outer surface of the backrest side plate 10, affecting the aesthetics and flatness of the backrest structure.

[0050] Furthermore, a profiling limiting rib 11 is arranged on the inner side of the backrest side plate 10, and the profiling limiting rib 11 is arranged along the outer edge of the cushion block 20. The cushion block 20 is also provided with a plurality of support walls 24. The support walls 24 are perpendicular to the side walls 21. One end of the support wall 24 away from the side wall 21 contacts the profiling limiting rib 11. By arranging the profiling limiting rib 11 and the support walls 24, the fixing position of the cushion block 20 is limited, making the connection between the cushion block 20 and the backrest side plate 10 more stable and not prone to shaking.

[0051] As Figure 9 shown, the seat frame connecting member 30 includes a backrest connecting portion 31 and a seat frame connecting portion 32. The backrest connecting portion 31 extends into the receiving groove 221 from the opening 2211 and is snap-fitted with the elastic buckle 222, and the opening 311 is located on the backrest connecting portion 31. The seat frame connecting portion 32 is fixed to the seat frame structure.

[0052] Specifically, the materials of the backrest side plate 10 and the cushion block 20 are both plastics, making the weight of the backrest structure lighter and the cost lower, realizing lightweight design and meeting the requirement of cost reduction. The material of the seat frame connecting member 30 is plastic or metal.

[0053] This application also provides a seat, including a seat frame structure and the backrest structure as described above.

[0054] In the backrest structure and the seat of this application, by arranging the installation portion 22 and the support portion 23 on the cushion block 20, the seat frame connecting member 30 is connected to the installation portion 22, and the backrest side plate 10 can be selectively fixed on the installation portion 22 or the support portion 23. In this way, both sides of the cushion block 20 can be connected to the backrest side plate 10, so that the seat frame connecting member 30 has two installation positions, close to the backrest side plate 10 and away from the backrest side plate 10, which can take into account the cooperation with two different widths of seat frame structures, realizing the convenient assembly and flexible switching of the functional position and the fixed position of the seat, improving the assembly efficiency and reducing the manufacturing cost at the same time.

[0055] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. A backrest structure, characterized in that: It includes a pair of backrest side panels, a pair of cushion blocks and a pair of seat frame connecting parts. The cushion blocks are assembled to the inner sides of the backrest side panels. The cushion blocks include side walls extending inward and outward directions and mounting parts and supporting parts arranged on opposite sides of the side walls. The seat frame connecting parts are connected to the mounting parts, and the backrest side panels can be selectively fixed to the mounting parts or the supporting parts.

2. The backrest structure according to claim 1, characterized in that: The mounting portion is provided with a first fixing portion, the supporting portion is provided with a second fixing portion, and the backrest side panels are correspondingly provided with fixing holes, which can selectively cooperate with the first fixing portion or the second fixing portion through fasteners to fix the cushion block to the backrest side panels.

3. The backrest structure according to claim 2, characterized in that: The first fixing portion and the second fixing portion are both arranged in a tubular shape and are connected as a whole; a sinking platform protruding inward is arranged on the side plate of the backrest, and the fixing hole is arranged on the sinking platform.

4. The backrest structure according to claim 2, characterized in that: The number of the first fixing parts and the number of the second fixing parts are both two, the two first fixing parts are both arranged on the side wall and located at the front and rear sides of the side wall, and the two second fixing parts are both arranged on the side wall and located at the front and rear sides of the side wall.

5. The backrest structure according to claim 1, characterized in that: The backrest side panels and the cushion blocks are made of plastic, and the seat frame connector is made of plastic or metal.

6. The backrest structure according to claim 1, characterized in that: The mounting portion is provided with a receiving groove and an elastic buckle protruding into the receiving groove, an opening is formed below the receiving groove, and the seat frame connecting member includes a backrest connecting portion extending from the opening into the receiving groove, and the backrest connecting portion is clamped with the elastic buckle.

7. The backrest structure according to claim 6, characterized in that: The mounting portion also includes a first limiting plate and a second limiting plate parallel to the backrest side plate, the first limiting plate and the second limiting plate are respectively connected to the side walls and are located on opposite sides of the receiving groove, and the elastic buckle is arranged on the first limiting plate or the second limiting plate.

8. The backrest structure according to claim 7, characterized in that: The first limiting plate is located on a side close to the supporting portion, the elastic buckle includes an arm portion and a hook portion, the upper and lower ends of the arm portion are respectively connected to the first limiting plate and the hook portion, an opening that cooperates with the elastic buckle is provided on the backrest connecting portion, and the hook portion is located in the opening hole.

9. The backrest structure according to claim 1, characterized in that: The inner side of the backrest side plate is provided with a contour-profiling limiting rib, and the contour-profiling limiting rib is arranged along the outer edge of the cushion block.

10. The backrest structure according to claim 9, characterized in that: The cushion block is also provided with a plurality of supporting walls perpendicular to the side wall, and one end of the supporting wall away from the side wall is in contact with the contour-profiling limiting rib.

11. The backrest structure according to claim 1, characterized in that: A cavity is formed in the support portion, and a plurality of positioning ribs are arranged in the cavity. The positioning ribs extend in the inner and outer directions from a side of the support portion close to the mounting portion to a side away from the mounting portion.

12. A seat, characterized in that: The invention comprises a seat frame structure and a backrest structure as claimed in any one of claims 1 to 11, wherein the seat frame connecting member comprises a seat frame connecting portion, and the seat frame connecting portion is fixed to the seat frame structure.

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