Backrest and armrest connection structure and seat thereof

Abstract

The utility model relates to a backrest and handrail connecting structure and seat thereof, including backrest and handrail, the lower extreme of handrail is connected with the bottom of cushion, the lower part both sides of backrest frame are shaped with connecting seat, the rear end of handrail extends and adapts to the outer end of connecting seat and is pasted, the outer end of connecting seat forms the connecting groove, the bottom surface of connecting groove is protruding and is equipped with a plurality of connecting columns, and the first connecting hole is set up on connecting column, the rear end of handrail forms the docking groove, the bottom surface of docking groove is equipped with a plurality of assembly seats corresponding with a plurality of connecting columns, the second connecting hole that passes through the surface of handrail is set up on assembly seat, the side end face that assembly seat is towards connecting column forms the insertion slot, and connecting column part stretches into insertion slot, and the bolt is screwed into the first connecting hole from the surface of handrail along the second connecting hole and fixes handrail and backrest frame. The rear end of above -mentioned scheme handrail extends to with the connecting seat of backrest frame lower part adapts to splice and pastes, and the both can be detached through bolt and are connected, and the connecting strength of handrail is improved greatly.

Description

Technical Field

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

[0002] Existing chairs, such as leather chairs and office chairs, typically have armrests located on both sides of the seat cushion, with the lower end of the armrest connected to the bottom of the seat cushion. For example, a Chinese utility model patent with publication number CN221963224U discloses an adjustable office chair armrest structure, including a base rod, a positioning rod, and a support portion. The base rod has a hollow groove in the middle and locking grooves spaced apart on both sides. The positioning rod is fitted onto the outer wall of the base rod and can slide along its length. The base rod has a crank that extends into the hollow groove, and the lower end of the crank has a locking rod that engages with the locking groove. The support portion is located at the upper end of the positioning rod, and the rear end of the crank has a button extending out of the support portion. The button is located on the bottom wall of the support portion; pressing the button moves the locking rod away from the locking groove. The upper part of the armrest described above has no fixed structure; it is only connected to the seat cushion by the bottom bar at the lower end. The structural stability is limited, and if the user's arms are long, the support part at the upper end of the armrest is of limited length and cannot provide full support, so the elbow is easily exposed, which affects the user experience.

[0003] In addition, some chairs have extended armrests that connect to the backrest. For example, Chinese invention patent CN119867473A discloses an armrest connection structure and an office chair with it, relating to the field of chair technology. The structure includes: a chair body with a backrest panel on the rear side, the backrest panel having a first protrusion with a first protrusion mounting hole; an armrest component with an armrest mounting part and an armrest extension, the armrest mounting part having a third protrusion on its front side and a lower armrest mounting hole on its lower side; and a connector connecting the backrest panel and the armrest mounting part, the connector having a second protrusion on its front side and a second protrusion mounting hole. The chair body and armrest component are connected by the connector, which improves the stability of the armrest connection. A first fixing screw is obliquely inserted to splice the connector and the chair body, making the force on the first fixing screw more reasonable and preventing it from loosening, ensuring that the connector and chair body remain sufficiently secure even after long-term operation. The extended portion of the handrail in the above design has poor stability and cannot provide effective and comfortable support for a long time.

[0004] In addition, there are some with integrated backrests and armrests, but these are not conducive to transportation. Summary of the Invention

[0005] To address the aforementioned issues, the present invention aims to provide a backrest and armrest connection structure and a corresponding seat, wherein the lower end of the armrest is connected to the bottom of the seat cushion, and the rear end of the armrest extends and is detachably connected to the backrest frame, thereby significantly improving the connection strength of the armrest, enhancing its safety and comfort, and extending the product's service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A backrest and armrest connection structure includes a backrest and armrests, with the lower end of the armrest connected to the bottom of the seat cushion. The backrest includes a backrest frame and flexible padding layers disposed on the front and rear surfaces of the backrest frame. Connecting seats are formed on both sides of the lower part of the backrest frame. The rear end of the armrest extends rearward to fit and conform to the outer end of the connecting seat. A connecting groove is formed at the outer end of the connecting seat, and multiple connecting posts protrude from the bottom surface of the connecting groove. A first connecting hole is formed on each connecting post. A mating groove is formed at the rear end of the armrest, and multiple mounting seats corresponding to the multiple connecting posts are provided on the bottom surface of the mating groove. A second connecting hole penetrates the surface of the armrest on each mounting seat. A slot is formed on the side of the mounting seat facing the connecting post, and a portion of the connecting post extends into the slot. Bolts are screwed from the surface of the armrest along the second connecting hole into the first connecting hole to fix the armrest and the backrest frame.

[0008] Preferably, the handrail surface has grooves corresponding to multiple mounting seats, the bottom surface of the grooves has multiple locking holes communicating with the docking grooves, and a cover plate is adapted to fit over the grooves, and the cover plate has multiple locking buckles that engage with the locking holes.

[0009] Preferably, a first mating wall protrudes from the outside of the connecting column on the bottom surface of the connecting groove, and a second mating wall is provided on the outside of the mounting base on the bottom surface of the mating groove. The outer wall of the first mating wall extends into the mating groove and abuts against the inner wall of the second mating wall.

[0010] Preferably, one side of the second docking wall protrudes and extends to form a guide arc-shaped wall that connects to the inner wall of the docking groove, and one side of the first docking wall extends outward to cooperate with the guide arc-shaped wall.

[0011] Preferably, the inner wall of the first connecting wall and the connecting column, as well as the adjacent connecting columns, are provided with multiple first reinforcing ribs.

[0012] Preferably, the inner wall of the second mating wall and the assembly seat, as well as the adjacent assembly seats, are provided with multiple second reinforcing ribs.

[0013] Preferably, multiple third reinforcing ribs are provided between the outer wall of the second docking wall on the side opposite to the guide arc wall and the inner wall of the docking groove.

[0014] Preferably, the armrest includes a connecting part connected to the seat cushion, and a main body part disposed at the upper end of the connecting part and connected to the backrest frame. The connecting part and the main body part are integrally formed, and the inner end of the connecting part and the outer end of the main body part are both constructed with weight-reducing grooves.

[0015] Preferably, the bottom surface of the weight-reducing groove on the main body is provided with multiple ventilation holes.

[0016] A type of seat, characterized in that it includes a backrest and armrest connection structure as described in any one of the above descriptions.

[0017] The present invention adopts the above technical solution and has the following beneficial effects:

[0018] The lower end of the integrated armrest connects to the bottom of the seat cushion, and the rear end of the armrest extends to fit and fit snugly with the connecting seat at the bottom of the backrest frame. There are no extra connecting parts on the two mating surfaces, resulting in a well-integrated seat. A connecting post is set on the connecting seat, and then an assembly seat is set on the armrest to mate with the connecting post. The two are detachably connected by bolts, which not only greatly improves the connection strength of the armrest but also effectively extends the length of the armrest, enhancing its safety and comfort. It also makes the detachable transport of the armrest and backrest easier. A cover plate conceals the bolt connection points for a more aesthetically pleasing look. The first mating wall on the connecting seat mates with the second mating wall on the armrest, allowing for quick pre-installation of the connecting seat and armrest while effectively preventing radial rotation between them, further improving the connection strength between the armrest and backrest. Furthermore, after significantly improving the connection strength between the armrest and backrest, a weight-reducing groove is incorporated to reduce costs, and ventilation holes are added for better breathability, preventing stuffiness that can occur with leather chairs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection structure between the seat cushion, armrests, and backrest of a chair.

[0020] Figure 2 This is a schematic diagram of the connection structure of the seat cushion, armrests and backrest from another perspective.

[0021] Figure 3 This is a schematic diagram of the assembly of the backrest frame and armrests.

[0022] Figure 4 This is a schematic diagram of the connection arrangement on the backrest frame.

[0023] Figure 5 This is a schematic diagram of the arrangement within the docking groove at the rear end of the handrail.

[0024] Figure 6 This is a schematic diagram showing the arrangement of the locking holes in the groove of the handrail.

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the cover plate.

[0026] Figure 8 for Figure 1 A schematic diagram of the side structure.

[0027] Figure 9 for Figure 8 A schematic diagram of the CC-direction section.

[0028] Figure 10 for Figure 9 Enlarged diagram of point A in the middle. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] like Figures 1-10 The backrest and armrest connection structure shown includes a backrest 1 and an armrest 2. The lower end of the armrest 2 is connected to the bottom of the seat cushion. The backrest 1 includes a backrest frame 3 and a flexible pad layer disposed on the front and rear surfaces of the backrest frame 3. Connecting seats 4 are formed on both sides of the lower part of the backrest frame 3. The rear end of the armrest 2 extends rearward to fit and conform to the outer end of the connecting seat 4. A connecting groove 5 is formed on the outer end of the connecting seat 4. Multiple connecting posts 6 are protruding from the bottom surface of the connecting groove 5. A first connecting hole 7 is opened on the connecting post 6. A docking groove 8 is formed at the rear end of the armrest 2. Multiple mounting seats 9 corresponding to the multiple connecting posts 6 are provided on the bottom surface of the docking groove 8. A second connecting hole 10 penetrating the surface of the armrest 2 is opened on the mounting seat 9. A slot 11 is formed on the side end of the mounting seat 9 facing the connecting post 6. The connecting post 6 extends into the slot 11. Bolts are screwed from the surface of the armrest 2 into the first connecting hole 7 along the second connecting hole 10 to fix the armrest 2 and the backrest frame 3.

[0035] In the above technical solution, the lower end of the armrest is connected to the bottom of the seat cushion, and the rear end of the armrest extends to fit and fit with the connecting seat at the bottom of the backrest frame. There are no extra connecting parts on the two mating surfaces, which makes the seat have good overall integrity. A connecting column is set on the connecting seat, and then an assembly seat is set on the armrest to connect with the connecting column. The two are detachably connected by bolts, which not only greatly improves the connection strength of the armrest, but also effectively extends the length of the armrest, improves the safety and comfort of the armrest, and makes the detachable transportation of the armrest and backrest more convenient.

[0036] Furthermore, the surface of the handrail 2 has grooves 12 corresponding to multiple mounting seats 9. The bottom surface of each groove 12 has multiple locking holes 13 communicating with the mating groove 8. A cover plate 14 is fitted onto the groove 12, and the cover plate 14 has multiple latches 15 that engage with the locking holes 13. In this technical solution, grooves are provided on the handrail corresponding to multiple mounting seats, and the bolt connections within the grooves are covered by the cover plate, resulting in a more aesthetically pleasing appearance. Moreover, the cover plate and the grooves are connected by latches, making assembly and disassembly very convenient.

[0037] Furthermore, a first mating wall 16 protrudes from the outside of the connecting post 6 on the bottom surface of the connecting groove 5, and a second mating wall 17 is provided on the outside of the mounting base 9 on the bottom surface of the mating groove 8. The outer wall of the first mating wall 16 extends into the mating groove 8 and abuts against the inner wall of the second mating wall 17. In this technical solution, the first mating wall on the backrest frame connecting groove and the second mating wall on the armrest mating groove cooperate to effectively prevent radial rotation between the connecting base and the armrest, further improving the connection strength between the armrest and the backrest and enhancing assembly stability.

[0038] Furthermore, one side of the second docking wall 17 extends outward to form a guide arc-shaped wall 18 that connects to the inner wall of the docking groove 8, and one side of the first docking wall 16 extends outward to cooperate with the guide arc-shaped wall 18. In this technical solution, the guide arc-shaped wall is provided at the point where it extends from the first docking wall, which allows for the rapid assembly of the second docking wall and the first docking wall, thereby enabling the pre-installation of the connecting seat and the handrail and improving convenience.

[0039] Furthermore, multiple first reinforcing ribs 19 are provided between the inner wall of the first docking wall 16 and the connecting column 6, as well as between adjacent connecting columns 6. In this technical solution, the setting of the first reinforcing ribs greatly improves the connection strength between the connecting column and the first docking wall, improves the structural stability of the connecting column and the first docking wall, and improves the assembly stability of the backrest frame connecting seat and the armrest.

[0040] Furthermore, multiple second reinforcing ribs 20 are provided between the inner wall of the second docking wall 17 and the assembly seat 9, as well as between adjacent assembly seats 9. In this technical solution, the provision of the second reinforcing ribs greatly improves the connection strength between the assembly seat and the second docking wall, enhances the structural stability of the assembly seat and the second docking wall, and improves the assembly stability of the backrest frame connecting seat and the armrest.

[0041] Furthermore, multiple third reinforcing ribs 21 are provided between the outer wall of the second docking wall 17 on one side opposite the guide arc-shaped wall 18 and the inner wall of the docking groove 8. In this technical solution, the setting of the third reinforcing ribs improves the connection strength between the second docking wall and the docking groove, and further enhances the structural stability of the second docking wall.

[0042] Furthermore, the armrest 2 includes a connecting portion 22 connected to the seat cushion, and a main body portion 23 disposed at the upper end of the connecting portion 22 and connected to the backrest frame 3. The connecting portion 22 and the main body portion 23 are integrally formed, and both the inner end of the connecting portion 22 and the outer end of the main body portion 23 are provided with weight-reducing grooves 24. In this technical solution, after the connection strength between the armrest and the backrest is greatly improved, the manufacturing cost of the armrest is reduced by setting the weight-reducing grooves.

[0043] Furthermore, multiple ventilation holes 25 are provided through the bottom surface of the weight-reducing groove 24 on the main body 23. In this technical solution, ventilation holes are provided on the armrests to prevent stuffiness during use, such as in leather chairs.

[0044] This utility model also discloses a seat, including the aforementioned backrest and armrest connection structure.

[0045] 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.

[0046] 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 armrest connection structure, comprising a backrest (1) and armrests (2), wherein the lower end of the armrests (2) is connected to the bottom of the seat cushion, characterized in that: The backrest (1) includes a backrest frame (3) and a flexible pad layer disposed on the front and rear surfaces of the backrest frame (3). Connecting seats (4) are formed on both sides of the lower part of the backrest frame (3). The rear end of the armrest (2) extends rearward to fit and conform to the outer end of the connecting seat (4). A connecting groove (5) is formed on the outer end of the connecting seat (4). Multiple connecting posts (6) are protruding from the bottom surface of the connecting groove (5). A first connecting hole (7) is opened on the connecting post (6). A docking groove is formed at the rear end of the armrest (2). (8) The bottom surface of the docking groove (8) is provided with multiple mounting seats (9) corresponding to multiple connecting columns (6). The mounting seat (9) is provided with a second connecting hole (10) penetrating the surface of the armrest (2). The mounting seat (9) has a slot (11) formed on one side end face facing the connecting column (6). The connecting column (6) extends into the slot (11). The bolt is screwed from the surface of the armrest (2) along the second connecting hole (10) into the first connecting hole (7) to fix the armrest (2) and the backrest frame (3).

2. The backrest and armrest connection structure according to claim 1, characterized in that: The handrail (2) has grooves (12) corresponding to multiple mounting seats (9) on its surface. The bottom surface of the groove (12) has multiple locking holes (13) that communicate with the docking groove (8). The groove (12) is fitted with a cover plate (14), and the cover plate (14) has multiple locking buckles (15) that cooperate with the locking holes (13).

3. The backrest and armrest connection structure according to claim 1, characterized in that: A first mating wall (16) protrudes from the bottom surface of the connecting groove (5) on the outside of the connecting column (6), and a second mating wall (17) is provided on the bottom surface of the mating groove (8) on the outside of the mounting base (9). The outer wall of the first mating wall (16) extends into the mating groove (8) and abuts against the inner wall of the second mating wall (17).

4. The backrest and armrest connection structure according to claim 3, characterized in that: The second docking wall (17) has a protruding extension on one side, which is connected to the inner wall of the docking groove (8), and the first docking wall (16) extends outward on one side to cooperate with the guide arc wall (18).

5. The backrest and armrest connection structure according to claim 3, characterized in that: Multiple first reinforcing ribs (19) are provided between the inner wall of the first docking wall (16) and the connecting column (6), as well as between adjacent connecting columns (6).

6. The backrest and armrest connection structure according to claim 5, characterized in that: Multiple second reinforcing ribs (20) are provided between the inner wall of the second docking wall (17) and the assembly seat (9), as well as between adjacent assembly seats (9).

7. The backrest and armrest connection structure according to claim 6, characterized in that: Multiple third reinforcing ribs (21) are provided between the outer wall of the second docking wall (17) relative to the guide arc wall (18) and the inner wall of the docking groove (8).

8. The backrest and armrest connection structure according to claim 1, characterized in that: The armrest (2) includes a connecting part (22) connected to the seat cushion, and a main body part (23) provided on the upper end of the connecting part (22) and connected to the backrest frame (3). The connecting part (22) and the main body part (23) are integrally formed, and the inner end of the connecting part (22) and the outer end of the main body part (23) are both constructed with weight-reducing grooves (24).

9. The backrest and armrest connection structure according to claim 8, characterized in that: Multiple ventilation holes (25) are provided through the bottom surface of the weight reduction groove (24) on the main body (23).

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

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