A sofa with molded parts

Abstract

This utility model relates to a sofa with a molded part. Existing sofas suffer from poor connection reliability between the backrest and base. This utility model includes a base and a backrest, the backrest being detachably connected to the base via a molded part. The backrest and base are separate yet tightly fitted to the molded part, eliminating noise caused by friction between the backrest and base. Replacing the original multi-layer board with a molded part offers advantages such as easy processing, high structural strength, and a smooth surface. This effectively improves the connection reliability between the backrest and base, preventing loosening, and also reduces friction between the molded part and the backrest, and between the molded part and the base, thereby reducing noise and improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of furniture, specifically to a sofa. Background Technology

[0002] The existing sofa includes a base and a backrest. The base contains a functional iron frame and a surrounding panel. The functional iron frame is connected to the backrest and is used to adjust the backrest's tilt angle, providing comfortable support for the user. The surrounding panel conceals the functional iron frame, serving a decorative purpose and enhancing the sofa's aesthetics. The backrest includes side panels on both sides. During installation, the functional iron frame is fixed to the inner wall of the side panel via a connector located at the top rear edge. To ensure aesthetics, the side panels and the surrounding panel are vertically aligned in corresponding sections. This results in gaps between the functional iron frame within the surrounding panel and the side panels. These gaps need to be filled with multi-layered plywood to ensure the connector is fixed and operates in conjunction with the side panel. Because the multi-layered plywood needs to withstand the weight of the backrest and the driving force from the functional iron frame, it may twist and deform due to multi-directional forces. This can cause loosening between the connector and the side panel, and also generate noise when adjusting the backrest angle or leaning against the backrest, affecting the user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a sofa with molded parts. By replacing the original multi-layer boards with molded parts, the structural strength is effectively improved, preventing loosening between the base and backrest, while also effectively reducing noise and enhancing the user experience.

[0004] This utility model achieves its purpose through the following method: A sofa with a molded component, comprising a base and a backrest, wherein the backrest is detachably connected to the base via the molded component. The backrest and base are separately configured but both are tightly fitted to the molded component to eliminate abnormal noise caused by friction between the backrest and the base. Replacing the original multi-layer board with a molded component offers advantages such as easy processing, high structural strength, and a smooth surface. This effectively improves the reliability of the connection between the backrest and the base, preventing loosening between them, and also effectively reduces friction between the molded component and the backrest, and between the molded component and the base. This reduces noise generated by the molded component under stress, thus improving the user experience.

[0005] Preferably, the molded part includes a first contact surface that conforms to the base and a second contact surface that conforms to the backrest. The backrest and the base clamp the molded part together to restrict relative movement between the base and the backrest. The molded part is tightly fitted to the base through the first contact surface and to the backrest through the second contact surface, which effectively improves the connection reliability and ensures that the relative positions of the base and the backrest are fixed, preventing loosening.

[0006] Preferably, the molded part is in the form of a block, with its two opposite surfaces forming the first and second contact surfaces, respectively, so that the base and the backrest are separated. The block-shaped molded part can be clamped between the backrest and the base to prevent the molded part from shifting under force, and it also effectively fills the gap between the base and the backrest, thus playing a role in separating and positioning the two.

[0007] Preferably, the base includes a functional iron frame and a surrounding panel. The top rear edge of the functional iron frame has a connecting piece, which is tightly fitted to the first contact surface and secured with fasteners. The surrounding panel conceals the functional iron frame, serving a decorative purpose. The functional iron frame allows for adjustment of the backrest angle, providing comfortable support for the user. The connecting piece is fitted onto the top rear edge of the functional iron frame, and its insertion and removal from the frame allows for separation of the backrest from the base, facilitating packaging, storage, and transportation.

[0008] Preferably, the insert kit has a through hole, the molded part has a through hole, and the backrest side has a mounting hole that matches the explosion nut. Fasteners pass through the through hole and the through hole in sequence, are inserted into the mounting hole, and are screwed into the explosion nut for locking. The insert kit is mounted on the side plate via the molded part. Fasteners pass through the insert kit, the molded part, and the side plate in sequence before being screwed into the explosion nut for locking. This ensures a secure connection between the three components and also ensures that the insert kit can be matched and connected to the functional frame, improving ease of assembly and disassembly.

[0009] Preferably, the periphery of the port facing the through hole is raised outward to form a positioning protrusion, and the periphery of the port facing the through hole is recessed to form a positioning groove. The positioning protrusion is embedded in the positioning groove to limit the misalignment between the insert and the molded part. The positioning protrusion is inserted into the positioning groove along the insertion direction of the fastener, which plays a positioning role for the insert and the molded part, ensuring that the through hole and the through hole are matched and aligned, and facilitating the passage of the fastener.

[0010] Preferably, there are at least two through holes, which are placed on the first contact surface. This increases the number of fasteners by increasing the number of through holes, thereby improving the connection strength between the insert and the molded part and limiting the deflection of the insert and the molded part, ensuring that the functional iron frame can drive the backrest to swing through the insert.

[0011] Preferably, the explosion nut includes a threaded tube, a limiting ring formed by folding outward from the periphery of the tube's port, and a positioning claw disposed on the outer edge of the limiting ring. The threaded tube is inserted into a mounting hole, and the positioning claw is inserted into the area on the backrest side located at the periphery of the mounting hole port to restrict the explosion nut from rotating with the fastener. The explosion nut is inserted into the port of the mounting hole and embedded in the side plate by the positioning claw, ensuring that there is no relative rotation between the explosion nut and the side plate. During installation, the screw is inserted into the mounting hole and locked to the threaded tube by rotation, effectively improving assembly efficiency.

[0012] Preferably, the backrest includes a back panel and a side panel perpendicularly disposed on the side edge of the back panel. The side panel has at least two insertion holes, and a corresponding insertion rod is provided on the second contact surface. The insertion rod is inserted into the corresponding insertion hole, so that the molded part fits tightly against the side panel through the second contact surface. The insertion of the molded part into the corresponding insertion hole ensures that the relative position between the molded part and the side panel is fixed, effectively preventing the molded part from deflecting relative to the side panel, effectively withstanding the swinging force from the insertion assembly, and ensuring that the functional frame can drive the backrest to swing through the insertion assembly.

[0013] Preferably, the insertion rods are four in number and are placed on the second contact surface. This not only increases the connection reliability by increasing the number of insertion rods, but also effectively simplifies the structure and facilitates production.

[0014] Preferably, the molded part is provided with reinforcing ribs to limit its deformation under stress. The hollow structure of the molded part with reinforcing ribs not only improves its structural strength and ensures a firm connection between the insert and the side plate, but also effectively reduces material usage and lowers costs.

[0015] Preferably, the molded part is integrally formed by injection molding, which not only facilitates integrated processing and improves processing efficiency, but also effectively reduces processing costs.

[0016] The beneficial effects of this utility model are as follows: by replacing the original multi-layer board with a molded part, the molded part has the characteristics of easy processing, good structural strength and smooth surface, which can effectively improve the connection reliability between the backrest and the base, prevent the base and the backrest from becoming loose, and also effectively reduce the friction between the molded part and the backrest, and between the molded part and the base, thereby reducing noise and improving the user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of the sofa;

[0018] Figure 2 This is a disassembly diagram of the assembly structure of the molded part;

[0019] Figure 3 This is a schematic diagram of the structure of the molded part;

[0020] Figure 4 This is a schematic diagram of the molded part from another perspective;

[0021] Figure 5 This is a schematic diagram of the structure of the explosive nut;

[0022] Figure 6 This is a schematic diagram of the structure of the plug-in kit;

[0023] In the diagram: 1. Base, 2. Backrest, 3. Molded part, 4. First contact surface, 5. Second contact surface, 6. Insert kit, 7. Fastener, 8. Through hole, 9. Through hole, 10. Positioning protrusion ring, 11. Positioning groove, 12. Side plate, 13. Insertion hole, 14. Insert rod, 15. Functional iron frame, 16. Enclosure plate, 17. Mounting hole, 18. Explosion nut, 19. Screw tube, 20. Limiting ring, 21. Positioning claw, 22. Reinforcing rib. Detailed Implementation

[0024] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 and 2 The sofa shown includes a base 1 and a backrest 2. The backrest 2 is detachably connected to the base 1 via a molded part 3. The backrest 2 and the base 1 are separate but both are tightly fitted to the molded part 3 to eliminate noise caused by friction between the backrest 2 and the base 1. Replacing the original multi-layer board with the molded part 3, the molded part 3 is easy to process, has good structural strength, and a smooth surface. This effectively improves the reliability of the connection between the backrest 2 and the base 1, preventing loosening between them. It also effectively reduces friction between the molded part 3 and the backrest 2, and between the molded part 3 and the base 1, thereby reducing noise generated by the molded part 3 under stress and improving the user experience.

[0026] In actual operation, the insert kit 6 is installed on the inner wall of the side plate 12 facing each other through the molded part 3. This effectively fills the gap between the side plate 12 and the insert kit 6, ensuring that the installation position of the insert kit 6 can be plugged and unplugged into the top of the rear edge of the functional iron frame 15. The backrest 2 and the base 1 can be quickly disassembled and assembled, which is convenient for packaging, storage and transportation. It can also effectively transmit the swinging force from the functional iron frame 15 between the insert kit 6 and the side plate 12, ensuring that the backrest 2 moves flexibly under the drive of the functional iron frame 15. This effectively prevents shaking and noise caused by loose connections between the side plate 12, the molded part 3 and the insert kit 6, and effectively improves the reliability of use.

[0027] In actual operation, the molded part 3 includes a first contact surface 4 that fits against the base 1 and a second contact surface 5 that fits against the backrest 2. The backrest 2 and the base 1 clamp the molded part 3 towards each other to restrict relative movement between the base 1 and the backrest 2. The molded part 3 is block-shaped, and its two opposite surfaces form the first contact surface 4 and the second contact surface 5, respectively. This ensures that the molded part 3 can be clamped and fixed by the side plate 12 and the insert 6, improving connection reliability, preventing relative deflection among the three, and effectively transmitting the swinging force from the functional iron frame 15.

[0028] During installation, firstly, the explosion nut 18 is inserted into the outer port of the mounting hole 17 facing away from the molded part 3, ensuring that the explosion nut 18 cannot rotate relative to the mounting hole 17; then, the insert kit 6 is stacked and assembled on the first contact surface 4 of the molded part 3, and the positioning protrusion ring 10 and the positioning groove 11 are matched and inserted to ensure that the through hole 9 and the through hole 8 are aligned; next, the second contact surface 5 of the molded part 3 is attached to the inner wall of the side plate 12, and the insert rod 14 is inserted into the corresponding insert hole 13 to align the through hole 9, the through hole 8, and the mounting hole 17; finally, the fastener 7 passes through the through hole 8, the through hole 9, and the mounting hole 17 from the inside out and is screwed and locked to the explosion nut 18 by rotating.

[0029] After installation, the fastener 7 is locked with the explosion nut 18 so that the side plate 12 and the insert kit 6 move towards each other and clamp the molded part 3. This ensures that the positioning protrusion 10 is tightly inserted into the positioning groove 11 and that the insert rod 14 is tightly inserted into the insertion hole 13. This ensures that the gap width between the insert kit 6 and the side plate 12 remains constant, ensuring that the insert kit 6 can be accurately assembled with the functional iron frame 15. It also effectively prevents relative deflection between the side plate 12 and the molded part 3, and between the molded part 3 and the insert kit 6, thereby ensuring that the swinging force generated by the functional iron frame 15 can be smoothly transmitted to the backrest 2.

[0030] In actual operation, the base 1 includes a functional iron frame 15 and a surrounding plate 16. The rear edge of the functional iron frame 15 is provided with a plug 6, which is tightly attached to the first contact surface 4 and fixed by fasteners 7. The surrounding plate 16 surrounds the functional iron frame 15, which not only serves to cover the functional iron frame 15, but also closely connects with the bottom edge of the backrest 2, improving aesthetics. It also effectively avoids the bottom edge of the backrest 2, providing the backrest 2 with the space required for swinging and preventing the bottom of the backrest 2 from being unable to swing due to contact with the top of the surrounding plate 16.

[0031] In actual operation, the insert kit 6 has a through hole 8, the molded part 3 has a through hole 9, and the side plate 12 has a mounting hole 17 for an explosion nut 18. The fastener 7 passes through the through hole 8 and the through hole 9 in sequence, is inserted into the mounting hole 17, and is screwed and locked with the explosion nut 18. There are at least two through holes 9, which are placed on the first contact surface 4, so that there are also two through holes 8 and two mounting holes 17. The relative positions of the through holes 8 on the insert kit 6, the relative positions of the through holes 9 on the molded part 3, and the relative positions of the mounting holes 17 on the side plate 12 are all the same, ensuring that the corresponding through holes 8, through holes 9, and mounting holes 17 can be aligned at the same time and fixed by the fastener 7, ensuring that there is no relative deflection between the insert kit 6, the molded part 3, and the side plate 12.

[0032] In actual operation, the periphery of the port of the perforation 8 facing the through hole 9 forms a positioning protrusion 10 by protruding outward (e.g.Figure 6 As shown), the periphery of the port of the through hole 9 facing the through hole 8 is recessed to form a positioning groove 11 (as shown). Figure 3 As shown, the positioning protrusion 10 is embedded in the positioning groove 11 to limit the offset between the insert 6 and the molded part 3. The groove wall contour of the positioning groove 11 matches the surface contour of the positioning protrusion 10, so that the two can be matched and inserted. This not only improves the positioning accuracy by increasing the contact area and ensures that the through hole 8 and the through hole 9 are aligned, making it convenient for the fastener 7 to be inserted, but also prevents relative offset and deflection between the insert 6 and the molded part 3.

[0033] In actual operation, the explosion nut 18 includes a threaded tube 19, a limiting ring 20 formed by folding outward from the periphery of the end of the threaded tube 19, and a positioning claw 21 (e.g., a positioning claw 21) disposed on the outer edge of the limiting ring 20. Figure 5 As shown, the threaded tube 19 is inserted into the mounting hole 17, and the positioning claw 21 is inserted into the area of ​​the side plate 12 located at the periphery of the port of the mounting hole 17 to restrict the rotation of the explosion nut 18 with the fastener 7. The positioning claw 21 of the explosion nut 18 is inserted into the side plate 12 along the axial direction of the threaded tube 19. The positioning of the side plate 12 and the positioning claw 21 is used to limit the rotation of the threaded tube 19. During installation, it is only necessary to drive the fastener 7 to rotate to complete the screw connection with the explosion nut 18. There is no need to manually fix the explosion nut 18, which facilitates disassembly and assembly.

[0034] In actual operation, the backrest 2 includes a back panel and a side panel 12 vertically disposed on the side edge of the back panel. The side panel 12 is provided with at least two insertion holes 13. The second contact surface 5 is provided with insertion rods 14 corresponding to the insertion holes 13 one by one. The insertion rods 14 are inserted into the corresponding insertion holes 13 so that the molded part 3 is tightly fitted to the side panel 12 through the second contact surface 5. The insertion of the insertion rods 14 into the corresponding insertion holes 13 ensures that the molded part 3 can be accurately positioned on the side panel 12, thereby ensuring that the mounting hole 17 is aligned with the through hole 9, facilitating the installation of the fastener 7. There are four insertion rods 14, which are distributed on the second contact surface 5. The side panel 12 is provided with four insertion holes 13 corresponding to the insertion rods 14 one by one. The insertion rods 14 are simultaneously inserted into the corresponding insertion holes 13, effectively limiting the relative deflection between the side panel 12 and the molded part 3.

[0035] In actual operation, the molded part 3 is integrally formed by injection molding, and the molded part 3 is provided with reinforcing ribs 22 (e.g., Figure 4 As shown), this is to limit the deformation of the molded part 3 under stress. The molded part 3 has a hollow structure and is equipped with reinforcing ribs 22, which not only improves the structural strength of the molded part 3 and ensures a firm connection between the insert 6 and the side plate 12, but also effectively reduces the amount of raw materials used and lowers costs.

Claims

1. A sofa with molded parts, comprising a base (1) and a backrest (2), characterized in that, The backrest (2) is detachably connected to the base (1) via a molded part (3). The backrest (2) and the base (1) are separated and both are tightly fitted with the molded part (3) to eliminate abnormal noise caused by friction between the backrest (2) and the base (1).

2. A sofa with a molded part according to claim 1, characterized in that, The molded part (3) includes a first contact surface (4) that fits against the base (1) and a second contact surface (5) that fits against the backrest (2). The backrest (2) and the base (1) clamp the molded part (3) towards each other to restrict the relative movement between the base (1) and the backrest (2).

3. A sofa with a molded part according to claim 2, characterized in that, The molded part (3) is in the shape of a block, and the two opposite surfaces of the molded part (3) respectively form the first contact surface (4) and the second contact surface (5) so that the base (1) and the backrest (2) are set separately.

4. A sofa with a molded part according to claim 2, characterized in that, The base (1) includes a functional iron frame (15) and a surrounding plate (16) arranged around the functional iron frame (15). The top of the rear edge of the functional iron frame (15) is provided with a plug fitting (6). The plug fitting (6) is closely attached to the first contact surface (4) and fixed by fasteners (7).

5. A sofa with a molded part according to claim 4, characterized in that, The insert (6) has a through hole (8), the molded part (3) has a through hole (9), and the backrest (2) has a mounting hole (17) on its side that matches the explosion nut (18). The fastener (7) passes through the through hole (8) and the through hole (9) in sequence, is inserted into the mounting hole (17), and is screwed and locked with the explosion nut (18).

6. A sofa with a molded part according to claim 5, characterized in that, The periphery of the port of the perforation (8) facing the through hole (9) forms a positioning protrusion (10) by protruding outward, and the periphery of the port of the through hole (9) facing the perforation (8) forms a positioning groove (11) by being recessed. The positioning protrusion (10) is embedded in the positioning groove (11) to limit the offset between the insert (6) and the molded part (3); or, there are at least two through holes (9) and they are placed on the first contact surface (4); or, the explosion nut (18) includes a threaded tube (19), a limiting ring (20) formed by folding outward from the periphery of the port of the threaded tube (19), and a positioning claw (21) provided on the outer edge of the limiting ring (20). The threaded tube (19) is inserted into the mounting hole (17), and the positioning claw (21) is inserted into the area on the side of the backrest (2) located at the periphery of the port of the mounting hole (17) to limit the explosion nut (18) from rotating with the fastener.

7. A sofa with a molded part according to claim 2, characterized in that, The backrest (2) includes a back panel and a side panel (12) vertically disposed on the side edge of the back panel. The side panel (12) is provided with at least two insertion holes (13). The second contact surface (5) is provided with insertion rods (14) corresponding to the insertion holes (13). The insertion rods (14) are inserted into the corresponding insertion holes (13) so that the molded part (3) fits tightly against the side panel (12) through the second contact surface (5).

8. A sofa with a molded part according to claim 7, characterized in that, The insertion rods (14) are four in number and are placed on the second contact surface (5).

9. A sofa with a molded part according to any one of claims 1-8, characterized in that, The molded part (3) is provided with reinforcing ribs (22) to limit the deformation of the molded part (3) under stress.

10. A sofa with a molded part according to any one of claims 1-8, characterized in that, The molded part (3) is integrally formed by injection molding.

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