Sofa main framework assembling and connecting structure

Abstract

The utility model discloses an assembling and connecting structure for a main framework of a sofa. The assembling and connecting structure comprises a main framework, a mounting rack is detachably arranged on the main frame; the main frame and the mounting rack are assembled; the device further comprises a serpentine spring and a connecting structure; the connecting structure comprises limiting blocks fixedly connected to the two ends of the serpentine spring, limiting grooves capable of containing the limiting blocks are formed in the opposite side faces in the mounting frame, through holes penetrating through the mounting frame are formed in the limiting grooves, and embedded nuts are arranged in the through holes. Threaded holes corresponding to the embedded nuts are formed in the limiting blocks, locking bolts are connected into the threaded holes in a threaded mode, and the lower ends of the locking bolts extend into the embedded nuts. The S-shaped spring is limited through the T-shaped limiting block and the limiting groove and locked through the locking bolt and the embedded nut, fixing in the horizontal direction and the vertical direction is achieved, and the phenomenon that the S-shaped spring is loosened due to long-time stress can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, specifically to a sofa main frame assembly and connection structure. Background Technology

[0002] Sofas are a common type of furniture in homes, offices, and public places. They can be classified by material into leather sofas, fabric sofas, solid wood sofas, rattan sofas, etc. Sofas are supported by a frame, with various types of foam providing elasticity, and then covered with a leather or fabric outer layer.

[0003] The sofa frame is a crucial component of a sofa, determining its load-bearing capacity, stability, and lifespan. Common sofa frames are made of wood, offering good load-bearing capacity, structural strength, and stability. Multiple serpentine springs are installed on the frame to provide support and elasticity for the subsequent foam layers. Currently, the serpentine springs are mostly installed using hooks, with their ends attached to pre-installed metal hangers on the frame. However, because the serpentine springs bear stress during actual use, their structural strength decreases over time, leading to displacement or detachment at the ends, affecting usability and indicating room for technological improvement. Utility Model Content

[0004] This invention aims to solve the aforementioned technical problem that the connection strength between the serpentine spring and the frame needs to be improved, and provides a sofa main frame assembly and connection structure.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a sofa main frame assembly and connection structure, including a main frame; a mounting bracket is detachably provided on the main frame, and corresponding assembly holes are provided on both the main frame and the mounting bracket along the circumference, with opposite assembly holes fixed together by bolts; both the main frame and the mounting bracket are assembled; and it also includes:

[0006] A serpentine spring; several are provided and evenly arranged and installed in the mounting bracket;

[0007] A connecting structure is located between the two ends of the serpentine spring and the mounting bracket. The connecting structure includes limiting blocks fixed to both ends of the serpentine spring. The mounting bracket has limiting grooves on opposite sides that can accommodate the limiting blocks. The limiting grooves have through holes that penetrate the mounting bracket, and the through holes have embedded nuts. The limiting blocks have threaded holes corresponding to the embedded nuts. Locking bolts are threaded into the threaded holes, and the lower ends of the locking bolts extend into the embedded nuts.

[0008] Furthermore, the main frame is formed by two long sides and two short sides intersecting and enclosing each other, and the connection is fixed by a row of nails; the mounting bracket is formed by two long sides and two short sides intersecting and enclosing each other, wherein each end of the short side is provided with a connecting block, and each end of the long side is provided with a connecting groove that can accommodate the connecting block, and the connecting groove and the connecting block are connected by bolts.

[0009] Furthermore, each of the four corners of the main frame is provided with diagonal braces, and both ends of the diagonal braces are fixed to the main frame by a row of nails; the diagonal braces and the inner corners of the main frame form a triangle.

[0010] Furthermore, both the limiting block and the limiting groove are T-shaped.

[0011] Furthermore, the locking bolt is an internal hex bolt.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] The serpentine spring is limited by T-shaped limiting blocks and limiting grooves, and locked by locking bolts and pre-embedded nuts to achieve fixation in the horizontal and vertical directions, which can prevent the serpentine spring from loosening due to long-term stress.

[0014] The entire structure is prefabricated, and each component can be assembled. Prefabricated construction facilitates transportation and storage, saving space and reducing the difficulty of transshipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is an exploded view of this utility model.

[0017] Figure 3 This is a schematic diagram of the mounting bracket structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the serpentine spring structure of this utility model.

[0019] As shown in the figure: 1. Main frame, 2. Mounting bracket, 3. Diagonal brace, 4. Assembly hole, 5. Connecting block, 6. Connecting groove, 7. Snake spring, 8. Limiting block, 9. Limiting groove, 10. Embedded nut, 11. Locking bolt. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Example 1, in conjunction with Appendix Figure 1A sofa main frame assembly and connection structure includes a main frame 1; a mounting bracket 2 is detachably provided on the main frame 1, and corresponding mounting holes 4 are provided on the main frame 1 and the mounting bracket 2 along the circumference, and the opposite mounting holes 4 are fixed together by bolts; the mounting bracket 2 distributes the force of the subsequent serpentine spring, reduces the impact on the main frame 1, and ensures the service life of the main frame 1.

[0022] Combined with appendix Figure 2 , 3 Both the main frame 1 and the mounting bracket 2 are assembled. Specifically, the main frame 1 is formed by two long sides and two short sides intersecting and being fixed at the joints with a row of nails. The multiple nail fixing positions ensure the stability of the main frame 1. The mounting bracket 2 is also formed by two long sides and two short sides intersecting and being provided with connecting blocks 5 at both ends of the short sides, and connecting grooves 6 near both ends of the long sides to accommodate the connecting blocks 5. The connecting grooves 6 and the connecting blocks 5 are connected by bolts. The mounting bracket 2 is assembled through the connecting blocks 5 and the connecting grooves 6. The connecting blocks 5 and the connecting grooves 6 increase the contact area between the strips of the mounting bracket 2, making the connection more stable and facilitating the subsequent support of the serpentine spring.

[0023] Combined with appendix Figure 1 , 3 The main frame 1 has diagonal braces 3 at all four corners, and the two ends of the diagonal braces 3 are fixed to the main frame 1 by a row of nails; the diagonal braces 3 and the inner corners of the main frame 1 form a triangle, which improves the stability of the main frame 1.

[0024] Combined with appendix Figure 1 , 2 4, and also includes a serpentine spring 7; several of them are provided and evenly arranged and installed in the mounting bracket 2;

[0025] Combined with appendix Figure 1 , 2 3, 4, also include a connecting structure located between the two ends of the serpentine spring 7 and the mounting bracket 2; specifically, the connecting structure includes limiting blocks 8 fixed to both ends of the serpentine spring 7, and limiting grooves 9 on opposite sides inside the mounting bracket 2 that can accommodate the limiting blocks 8. Both the limiting blocks 8 and the limiting grooves 9 are T-shaped. The T-shape makes the limiting blocks 8 and the limiting grooves 9 naturally form a limit, making it difficult for them to move in the horizontal direction, thus restricting the serpentine spring 7 in the horizontal direction;

[0026] Based on the above, the limiting groove 9 is provided with a through hole that passes through the mounting bracket 2, and a pre-embedded nut 10 is provided in the through hole; the limiting block 8 is provided with a threaded hole corresponding to the pre-embedded nut 10, and a locking bolt 11 is threadedly connected in the threaded hole. The lower end of the locking bolt 11 extends into the pre-embedded nut 10, and the locking bolt 11 is an internal hex bolt; during installation, the locking bolt 11 is screwed into the corresponding threaded hole and the pre-embedded nut 10 with a hex screwdriver to complete the fixing of the limiting block 8 and the serpentine spring 7.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sofa main frame assembly and connection structure, comprising a main frame (1); characterized in that: The main frame (1) is detachably provided with a mounting bracket (2). Both the main frame (1) and the mounting bracket (2) are provided with corresponding assembly holes (4) along the circumference. The opposite assembly holes (4) are fixed together by bolts. Both the main frame (1) and the mounting bracket (2) are assembled. It also includes: A serpentine spring (7); several of them are provided and evenly arranged and installed in the mounting bracket (2); Connection structure; located between the two ends of the serpentine spring (7) and the mounting bracket (2); the connection structure includes a limiting block (8) fixed to both ends of the serpentine spring (7), and a limiting groove (9) that can accommodate the limiting block (8) is provided on the opposite side of the mounting bracket (2). The limiting groove (9) is provided with a through hole that penetrates the mounting bracket (2), and a pre-embedded nut (10) is provided in the through hole. The limiting block (8) is provided with a threaded hole corresponding to the pre-embedded nut (10), and a locking bolt (11) is threadedly connected in the threaded hole. The lower end of the locking bolt (11) extends into the pre-embedded nut (10).

2. The sofa main frame assembly and connection structure according to claim 1, characterized in that: The main frame (1) is formed by two long sides and two short sides intersecting and being fixed at the joint by a row of nails; the mounting bracket (2) is formed by two long sides and two short sides intersecting and being provided with connecting blocks (5) at both ends of the short sides, and connecting grooves (6) that can accommodate the connecting blocks (5) are provided near both ends of the long sides, and the connecting grooves (6) and the connecting blocks (5) are connected by bolts.

3. The sofa main frame assembly and connection structure according to claim 2, characterized in that: The main frame (1) is provided with diagonal braces (3) at all four corners. The two ends of the diagonal braces (3) are fixed to the main frame (1) by a row of nails. The diagonal braces (3) and the inner corners of the main frame (1) form a triangle.

4. The sofa main frame assembly and connection structure according to claim 1, characterized in that: Both the limiting block (8) and the limiting groove (9) are T-shaped.

5. The sofa main frame assembly and connection structure according to claim 1, characterized in that: The locking bolt (11) is an internal hex bolt.

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