A connection device for a seat back and seat

Abstract

The utility model discloses a connecting device of seat back and seat, including connecting seat, the connecting seat forms and the first connecting surface and the second connecting surface of intersection, the first connecting surface sets up in the bottom of seat back, is used for covering seat back bottom surface and is fixedly connected with it, the back of seat back is close to the recess of the cross section of inverted L shape and is provided with one end in bottom, the second connecting surface is embedded in the recess, the first connecting surface is away from the second connecting surface one end and is provided with the connecting frame and the auxiliary frame of connecting with seat, the connecting frame forms in the middle part of the first connecting surface away from the second connecting surface one end, the utility model discloses adopting the connecting seat and the auxiliary frame of being able to wrap seat back whole lower end, has increased the contact area of seat back and seat connecting part, has dispersed the stress, makes the structure of connecting part more stable, beautiful, has better application prospect.

Description

Technical Field

[0001] This utility model belongs to the field of seat accessories, and in particular relates to a connection device for a chair back and a chair seat. Background Technology

[0002] With technological advancements and rising living standards, the comfort, functionality, practicality, and durability of chairs on the market have significantly improved. Against this backdrop, chairs with height adjustment functions are becoming increasingly popular. Currently, the backrest and seat of these adjustable chairs are often connected using metal right-angle brackets. One end of the bracket is fixed to the center of the bottom of the backrest, and the other end connects to the base box at the bottom of the seat. This connection method is widely used due to its economic efficiency and practicality.

[0003] However, this corner bracket fixing method has significant drawbacks: firstly, after long-term use, loose screws can easily cause the chair back to become unbalanced; secondly, when applied to thick chair backs or double-layered panel seats (such as "boss chairs" that emphasize backrest softness and comfort), the thickness of the backrest makes it easy for improper assembly to occur during installation, leading to overall structural imbalance. This problem is particularly pronounced for double-layered panel backs (including the outer panel protruding from the back of the seat and the inner panel that fits against the user's back). These backs typically use wood as the structural support, with a layer of foam covering the wood, and the two layers are often connected by snap-fit ​​fasteners, resulting in inherently weak internal stability. Furthermore, when the corner bracket connects to the seat, it often only secures to the inner material; if the processing precision is insufficient or the material strength is inadequate, the inner wood layer is easily damaged, leading to complete instability of the chair back structure. In addition, this connection method creates a noticeable separation between the chair back and seat, lacking overall aesthetic appeal and affecting the product's appearance and texture. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a novel connection device for chair back and seat, improving the stability and aesthetics of the seat connection. The specific structure is as follows:

[0005] A connection device for a chair back and a seat includes a connecting seat having intersecting first and second connecting surfaces. The first connecting surface is disposed at the bottom of the chair back and is used to cover and fix the bottom surface of the chair back to it. A groove with an inverted L-shaped cross-section is provided on the back of the chair back near the bottom surface. The second connecting surface is embedded in the groove. A connecting frame and an auxiliary frame for connecting to the seat are provided on the end of the first connecting surface away from the second connecting surface. The connecting frame is formed in the middle of the end of the first connecting surface away from the second connecting surface.

[0006] Preferably, the auxiliary frame is integrally formed with the connecting seat or with the chair seat.

[0007] Preferably, the auxiliary frame is fastened to the first connecting surface and the seat by screws, and the first connecting surface is provided with a connecting groove for the auxiliary frame to overlap; the seat is correspondingly provided with a locking part that extends to the auxiliary frame and overlaps with it.

[0008] Preferably, there is a pair of auxiliary frames, distributed on both sides of the first connecting surface away from the second connecting surface.

[0009] Preferably, a slot is formed on the upper side of the bottom of the groove; the upper edge of the second connecting surface is bent to form a locking edge that can be locked into the slot.

[0010] Preferably, the bottom of the groove has a plurality of locking holes, and the second connecting surface is provided with locking posts that engage with it.

[0011] Preferably, the second connecting surface is flush with the surrounding back surface of the chair back after it is installed.

[0012] Preferably, the surface of the connector is provided with a pattern, which can be formed by one or more of the following methods: printing, spraying, and water transfer printing.

[0013] Compared with the prior art, the specific beneficial effects of this utility model are as follows:

[0014] Compared to existing corner bracket connections, the stress on the chair back is concentrated at and near the corner bracket. If the chair back's manufacturing process is substandard or the materials are of poor quality, the connection points are easily damaged due to uneven stress, and the seat suffers from the same problem. In this embodiment, the connecting seat connects to the bottom surface of the chair back via a first connecting surface and is embedded in the back of the chair back via a second connecting surface. This increases the contact area and the number of stress points, distributing the stress and making the connection structure more stable. This is particularly suitable for chairs with thicker backs or those using double-layer panels. For example, for a double-layer panel chair back, the second connecting surface can be used to connect to the back panel of the chair back, and the first connecting surface can be used to connect to the bottom of the front panel of the chair back. Similarly, this embodiment increases the connection surface with the seat by setting an auxiliary frame, which also helps to distribute the stress.

[0015] Secondly, when the second connecting surface is installed flush with the surrounding back surface of the chair back, the chair back and the connecting seat fit together seamlessly without any obvious splicing marks. Simultaneously, the first connecting surface extends to the bottom surface of the chair back, and after connecting with the base box and auxiliary frame, it also overlaps to achieve a seamless transition, concealing the space between the chair back and seat and enhancing the overall aesthetics. Furthermore, the shape of the connecting seat itself can be aesthetically pleasing, allowing for customization, replacement, and personalized pattern design according to design requirements, adding more design appeal to the chair. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the application of the utility model embodiment in a seat;

[0017] Figure 2 for Figure 1 Top view with seat support hidden;

[0018] Figure 3 for Figure 2 Installation diagram of the middle connector;

[0019] Figure 4 A schematic diagram of the connector from one perspective;

[0020] Figure 5 This is a schematic diagram of the installation of the connector and the auxiliary frame. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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.

[0022] 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, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0024] like Figure 1-5 As shown, a connecting device for a chair back and a seat includes a connecting seat 2 connecting the chair back 1 and the seat 3, the connecting seat 2 forming an intersecting first connecting surface 22 and a second connecting surface 21; as shown in the attached specification. Figure 1-3As shown, although the bottom surface 12 and the back surface 11 of the chair back 1 are generally perpendicular, the angle between the first connecting surface 22 and the second connecting surface 21 is not required to be perpendicular. Their intersection is not required to form a rigid edge; it can also include a rounded transition or an aesthetically pleasing curved surface transition. The first connecting surface 22 is located at the bottom of the chair back, used to cover and fix the bottom surface 12 of the chair back to it. A groove 13 with an inverted L-shaped cross-section is provided at the end of the back surface 11 of the chair back near the bottom surface 12. The second connecting surface 21 is embedded in the groove 13. A connecting frame 220 and an auxiliary frame 23 for connecting to the seat are provided at the end of the first connecting surface 22 away from the second connecting surface 21. The connecting frame 220 is formed in the middle of the end of the first connecting surface 22 away from the second connecting surface 21. The chair seat described in this utility model can be a chair seat in a narrow sense, or a part of a chair seat structure in a broader sense, such as a chair seat base box. (See attached specification.) Figure 2 As shown, in this embodiment, the bottom box 31 of the chair seat 3 is connected. In this utility model, the back of the chair back refers to the side away from human contact, and the front refers to the side in contact with human contact.

[0025] Compared to existing corner bracket connections, the stress on the chair back is concentrated at and near the corner bracket. If the chair back's manufacturing process is substandard or the materials are of poor quality, the connection points are easily damaged due to uneven stress, and the seat suffers from the same problem. In this embodiment, the connecting seat 2 connects to the bottom surface 12 of the chair back via a first connecting surface 22 and is embedded in the back surface 11 of the chair back via a second connecting surface 21. This increases the contact area and the number of stress points, distributing the stress and making the connection structure more stable. This is particularly suitable for chairs with thicker backs or those using double-layer panels. For example, for a double-layer panel chair back, the second connecting surface can be used to connect to the back panel of the chair back, and the first connecting surface can be used to connect to the bottom of the front panel of the chair back. Similarly, this embodiment increases the connection surface with the seat by setting an auxiliary frame, which also helps to distribute the stress.

[0026] Furthermore, in this embodiment, the auxiliary frame 23 is an independent component, and a pair is provided, respectively distributed on both sides of the end of the first connecting surface 22 away from the second connecting surface 21. Figure 2 , 5 As shown, the first connecting surface 22 has a connecting groove 221. One end of the auxiliary frame 23 overlaps in the connecting groove 221 and is fastened with screws. The other end of the auxiliary frame 23 also has a connecting groove, allowing the bottom box 31 to overlap. The bottom box 31 has a locking part 310, which overlaps in the connecting groove of the auxiliary frame 23 and is also fastened with screws. Through this overlapping method, the connection between the auxiliary frame 23 and the first connecting surface 22 and the bottom box 31 is flush with the surrounding surface, with no obvious transition marks, improving aesthetics.

[0027] In some embodiments, the auxiliary frame may also be a non-independent component, but rather integrally formed with the connecting seat or the chair seat, with the free end connected to another component.

[0028] Furthermore, this embodiment discloses an assembly method for the second connecting surface 21 after it is embedded in the groove 13, including: forming a slot 14 on the upper side of the bottom of the groove 13; bending the upper edge of the second connecting surface 21 to form a retaining edge 211 that can be engaged with the slot 14; and achieving the second connecting surface 21 being embedded in the groove 13 through the engaging engagement of the slot 14 and the retaining edge 211. Furthermore, to enhance assembly strength, this embodiment adds another assembly method based on the above: forming multiple retaining holes 15 at the bottom of the groove 13; and providing retaining posts 212 corresponding to the second connecting surface 21; and increasing the adhesion of the second connecting surface 21 to the back of the chair back 11 through the engaging engagement of the retaining holes 15 and the retaining posts 212.

[0029] Furthermore, since the shape of the connecting seat 2 itself is aesthetically pleasing, and secondly, when the second connecting surface 21 is installed and flush with the surrounding backrest surface 11, the backrest 1 and the connecting seat 2 can fit together seamlessly without any obvious transition marks. Simultaneously, the first connecting surface 22 extends to the bottom surface 12 of the backrest, and after connecting with the base box 31 and the auxiliary frame 23, it also achieves a seamless transition through overlap, and can conceal the space between the backrest 1 and the seat 3, enhancing the overall aesthetics. In addition, the surface of the connecting seat 2 can be decorated with patterns, which can be formed through one or more methods such as printing, spraying, and water transfer printing, adding more aesthetic appeal to the seat.

[0030] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A connection device for a seat back and seat pan, characterized in that The device includes a connecting seat, which has intersecting first and second connecting surfaces. The first connecting surface is located at the bottom of the chair back and is used to cover and fix the bottom surface of the chair back. A groove with an inverted L-shaped cross-section is provided on the back of the chair back near the bottom surface. The second connecting surface is embedded in the groove. A connecting frame and an auxiliary frame for connecting to the seat are provided on the end of the first connecting surface away from the second connecting surface. The connecting frame is formed in the middle of the end of the first connecting surface away from the second connecting surface.

2. A seat back and seat connection as claimed in claim 1, wherein, The auxiliary frame is integrally formed with the connecting seat or with the chair seat.

3. A seat back and seat connection as claimed in claim 1, wherein, The auxiliary frame is fastened to the first connecting surface and the seat by screws. The first connecting surface is provided with a connecting groove for the auxiliary frame to overlap. The seat is correspondingly provided with a locking part that extends to the auxiliary frame and overlaps with it.

4. A seat back and seat connection as claimed in claim 1, wherein, The auxiliary frame is a pair, distributed on both sides of the first connecting surface away from the second connecting surface.

5. A seat back and seat connection as claimed in claim 1, wherein, A slot is formed on the upper side of the bottom of the groove; the upper edge of the second connecting surface is bent to form a locking edge that can be locked into the slot.

6. A seat back and seat connection as claimed in any one of claims 1 to 5, wherein, The bottom of the groove has several locking holes, and the second connecting surface is provided with locking posts that engage with it.

7. A seat back and seat connection as claimed in claim 6, wherein, After the second connecting surface is installed, it is flush with the surrounding back surface of the chair back.

8. A seat back and seat connection as claimed in claim 6, wherein, The surface of the connector is provided with a pattern, which can be formed by one or more of the following methods: printing, spraying, and water transfer printing.

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