A sofa function piece, a sofa backrest function piece and a sofa armrest function piece

Abstract

The utility model relates to sofa accessory technology field discloses a sofa function spare, sofa backrest function spare and sofa armrest function spare, include: bottom plate, top plate, perforation, first swing arm and second swing arm, the both sides outer wall of bottom plate and top plate all are equipped with the perforation of through -going, the bottom plate and top plate are connected through first swing arm and second swing arm, first swing arm and second swing arm are all arc structure, both ends of first swing arm and second swing arm are fixed with sleeve, and sleeve is worn in the inside of perforation, the junction of sleeve and perforation is equipped with the wear -resisting slide sleeve of setting, and the one end of sleeve is inserted and is equipped with the pin rod of end head with screw thread. This sofa function spare is provided with the first swing arm and second swing arm of both end fixed sleeve, and the snap -on design of cooperation connecting plate and top plate makes this sofa function spare keep compact structure, simplifies the part and production technology, reduces the cost, and simultaneously, the sofa function spare realizes quick dismounting simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of sofa accessories technology, specifically a sofa functional component, a sofa backrest functional component, and a sofa armrest functional component. Background Technology

[0002] Sofa accessories are the structural components of a sofa used for support, decoration, or functional enhancement; they primarily refer to the sofa's hardware. These accessories connect, secure, and support the sofa, ensuring its stability and functionality. Some hardware accessories are used to adjust the backrest's position, allowing users to customize the sofa's space and increase comfort.

[0003] The hardware components for sofas on the market are structurally complex, have high design and production costs, and are cumbersome to install, requiring multiple assembly steps inside the sofa frame, which increases the difficulty and time consumption of installation. To address this, we propose a sofa functional component, a sofa backrest functional component, and a sofa armrest functional component. Utility Model Content

[0004] The purpose of this utility model is to provide a sofa functional component, a sofa backrest functional component, and a sofa armrest functional component to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sofa functional component, a sofa backrest functional component, and a sofa armrest functional component, comprising: Base plate, top plate, perforation, first swing arm and second swing arm; Both sides of the outer walls of the bottom plate and the top plate are provided with through holes. The bottom plate and the top plate are connected by a first rotating arm and a second rotating arm. Both the first rotating arm and the second rotating arm are of an arc shape. Both ends of the first rotating arm and the second rotating arm are fixed with sleeves, and the sleeves pass through the inner side of the through holes. A wear-resistant sliding sleeve is fitted at the connection between the sleeve and the through hole. A threaded pin is inserted into one end of the sleeve. A dustproof screw cap is installed on the threaded end of the sleeve near the pin.

[0006] Furthermore, the base plate has a fixing hole for connecting with the sofa frame. The dustproof screw cap and the pin are connected by a thread, and the dustproof screw cap forms a sealing structure with the sleeve through the pin and the wear-resistant sliding sleeve.

[0007] Furthermore, the arc centers of the first and second rotating arms are in opposite directions, and the first and second rotating arms are respectively connected to the bottom plate and the top plate through sleeves, pins and dust caps.

[0008] Furthermore, a first corner block is fixed to one side of the outer wall of the top plate, a clamping block is vertically fixed to the other side of the outer wall of the top plate, a connecting plate is installed on the upper outer wall of the top plate, a second corner block is fixed to the outer wall of the connecting plate near the first corner block, a connecting bolt is passed through the middle of the first corner block and the second corner block, a buckle plate is vertically fixed to the outer wall of the connecting plate near the clamping block, and a gap is opened at the connection between the buckle plate and the connecting block to facilitate the clamping block to pass through.

[0009] Furthermore, the outer wall of the first corner block and the inner wall of the second corner block are tightly fitted together, and the top plate is threadedly connected to the connecting plate through the first corner block, the second corner block and the connecting bolt.

[0010] Furthermore, the connecting plate is connected to the top plate by a snap-fit ​​plate and a clamping block to prevent the connecting plate from shifting during adjustment.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The sofa functional component is equipped with a first rotating arm and a second rotating arm with fixed sleeves at both ends. With the interlocking design of the connecting plate and the top plate, the sofa functional component maintains a compact structure while simplifying parts and production processes, reducing costs, and facilitating quick assembly and disassembly of the sofa functional component. The sofa backrest and armrest components, through the movement of the third and fourth swivel arms, transform the fixed support of the base plate into a stable and controllable tilting motion of the upper support plate and backrest. Together with the sofa backrest fixing block and sofa armrest fixing block, they securely connect to the sofa structure, making them suitable for sofas of different sizes. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of the sofa functional components in working state according to this utility model; Figure 2 This is a schematic diagram of the sofa functional component of this utility model in the form of a non-connecting plate. Figure 3 This is an enlarged structural diagram of the disassembled connecting plate of the sofa functional component of this utility model; Figure 4 This is a perspective plan view of the rotating state of the sofa functional component of this utility model.

[0013] Figure 5 This is a schematic diagram of the main structure of the sofa backrest functional component of this utility model.

[0014] Figure 6 This is a schematic diagram of the structure of the sofa armrest functional component of this utility model.

[0015] In the diagram: 1. Base plate; 2. Fixing hole; 3. Through hole; 4. Sleeve; 5. First rotating arm; 6. Second rotating arm; 7. Wear-resistant sliding sleeve; 8. Pin; 9. Dustproof screw cap; 10. Top plate; 11. First corner block; 12. Clamping block; 13. Connecting plate; 14. Second corner block; 15. Connecting bolt; 16. Buckle plate; 17. Third rotating arm; 18. Fourth rotating arm; 19. Short sleeve; 20. Upper support plate; 21. Fixing clamping plate; 22. Damping bearing; 23. Sofa backrest fixing block; 24. Rotating plate; 25. Sofa armrest fixing block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1

[0018] This utility model provides an improved sofa functional component, please refer to [link / reference]. Figures 1-2 and Figure 4 The system includes: a base plate 1, with fixing holes 2 for bolt connection to the sofa frame; through holes 3 on both outer walls of the base plate 1; and through holes 3 on both outer walls of the top plate 10. The base plate 1 and the top plate 10 are connected by a first rotating arm 5 and a second rotating arm 6, both of which are bow-shaped. Sleeves 4 are fixed to both ends of the first rotating arm 5 and the second rotating arm 6, passing through the inside of the through holes 3. A wear-resistant sliding sleeve 7 is fitted at the connection between the sleeve 4 and the through hole 3 to reduce friction and wear during rotation and improve the service life of the components. One end of the sleeve 4 is fitted with an end cap. The threaded pin 8 and sleeve 4 are fitted with a dustproof cap 9 at the threaded end of the pin 8. The dustproof cap 9 and the pin 8 form a threaded connection, and the dustproof cap 9 forms a sealing structure with the sleeve 4 through the pin 8 and the wear-resistant sliding sleeve 7, effectively preventing dust and impurities from entering the rotating parts and ensuring smooth and stable rotation. The arc centers of the first rotating arm 5 and the second rotating arm 6 are opposite, and the first rotating arm 5 and the second rotating arm 6 are respectively connected to the bottom plate 1 and the top plate 10 through the sleeve 4, the pin 8 and the dustproof cap 9, so that the top plate 10 always remains horizontal during the swinging process, avoiding tilting or deviation, and improving the adjustment stability and comfort of the sofa.

[0019] Please see Figures 1-3A sofa functional component includes: a first corner block 11 fixed to one outer wall of a top plate 10; a clamping block 12 vertically fixed to the other outer wall of the top plate 10; a connecting plate 13 disposed on the upper outer wall of the top plate 10; a second corner block 14 fixed to the outer wall of the connecting plate 13 near the first corner block 11; the outer wall of the first corner block 11 and the inner wall of the second corner block 14 are tightly fitted together; and a connecting bolt 15 passes through the middle of the first corner block 11 and the second corner block 14. The top plate 10 is connected by the first corner block 11 and the second corner block 14. The two corner blocks 14 and the connecting bolts 15 form a threaded connection with the connecting plate 13, so as to achieve a stable installation of the connecting plate 13 and the top plate 10. A buckle plate 16 is vertically fixed on the outer wall of the connecting plate 13 near the clamping block 12, and a gap is opened at the connection between the buckle plate 16 and the connecting plate 13 to facilitate the clamping block 12 to pass through. The connecting plate 13 forms a snap-fit ​​connection with the top plate 10 through the buckle plate 16 and the clamping block 12, which prevents the connecting plate 13 from shifting during the adjustment process, and further improves the installation stability and adjustment reliability.

[0020] Example 2

[0021] For sofa backrest functional components, please refer to [link / reference]. Figure 5 The system includes: a base plate 1, a fixing hole 2, a through hole 3, a sleeve 4, a wear-resistant sliding sleeve 7, a pin 8, a dustproof screw cap 9, and a third rotating arm 17 and a fourth rotating arm 18 fixed to the outer wall of the upper end of the sleeve 4. The third rotating arm 17 and the fourth rotating arm 18 are rotatably connected to the base plate 1 through a short sleeve 19. The top ends of the third rotating arm 17 and the fourth rotating arm 18 are each fixed with a short sleeve 19, and the third rotating arm 17 and the fourth rotating arm 18 are rotatably connected to the upper support plate 20 through the short sleeve 19. Both ends of the short sleeve 19 are connected to the upper support plate 20 through matching wear-resistant sliding sleeves 7, pins 8, and dustproof screw caps 9. The upper support plate 20... A fixing plate 21 is symmetrically installed on one side of the upper surface via bolts. A damping bearing 22 is connected to the top of the fixing plate 21. A sofa backrest fixing block 23 is fixed to the rotating part of the damping bearing 22, and the sofa backrest fixing block 23 is rotatably connected to the fixing plate 21 via the damping bearing 22. In this embodiment, the basic connecting and rotating components such as the base plate 1, fixing hole 2, through hole 3, sleeve 4, wear-resistant sliding sleeve 7, pin 8, and dustproof screw cap 9 are the same as in Embodiment 1 to ensure the same installation interface and load-bearing reliability. The sofa backrest fixing block 23 can rotate with the inner ring of the damping bearing 22, realizing the angle adjustment of the backrest. The damping bearing 22 provides appropriate rotational resistance, allowing the backrest to be suspended at any angle, improving comfort and safety. The entire functional component, through the third rotating arm 17, the fourth rotating arm 18, and the rotating pairs at their upper and lower ends, transforms the fixed support of the base plate 1 into a smooth and controllable tilting movement of the upper support plate 20 and the backrest.

[0022] Example 3

[0023] For sofa armrest functional components, please refer to [link / reference]. Figure 6 The system includes: a base plate 1 with the same structure as the sofa backrest, fixing holes 2, through holes 3, sleeves 4, wear-resistant sliding sleeves 7, pins 8, dustproof screw caps 9, and a third rotating arm 17 and a fourth rotating arm 18 fixed to the upper outer wall of the sleeve 4. Short sleeves 19 are fixed to the top of both the third rotating arm 17 and the fourth rotating arm 18. Both ends of the short sleeves 19 are connected to an upper support plate 20 via matching wear-resistant sliding sleeves 7, pins 8, and dustproof screw caps 9. A fixing clamp 21 is symmetrically installed on one side of the upper surface of the upper support plate 20 via bolts. A damping bearing 22 is connected to the top of the fixing clamp 21. A rotating plate 24 is fixed to the rotating part of the damping bearing 22. The outer surface of the rotating plate 24 is secured with bolts. The sofa armrest fixing block 25 is equipped with a detachable structure between itself and the rotating plate 24. The sofa armrest fixing block 25 is rotatably connected to the rotating plate 24, the damping bearing 22, and the fixing plate 21. This functional component is highly interchangeable with the main mechanical structure of Embodiment 2, including the same base plate 1, fixing hole 2, through hole 3, sleeve 4, wear-resistant sliding sleeve 7, pin 8, dustproof screw cap 9, third rotating arm 17, fourth rotating arm 18, short sleeve 19, upper support plate 20, fixing plate 21, and damping bearing 22. The sofa armrest fixing block 25 is connected to the rotating plate 24 by bolts, which enables quick assembly and disassembly, making it easy to combine and assemble with sofa armrests of different specifications, and improving its applicability.

[0024] Working Principle: For this type of sofa functional components, including sofa backrest and armrest components, the core working principle of this series of functional components is based on a four-bar linkage composed of bow-shaped rotating arms to achieve smooth linear or arc-shaped motion transmission. For basic sofa functional components, the adjustment force applied by the user is transmitted to the top plate 10 through the connecting plate 13, causing the first rotating arm 5 and the second rotating arm 6 connected to it to rotate in tandem. Due to the bow-shaped structure design of the two rotating arms and the opposite direction of their arc centers, they can cancel out the lateral component force in the horizontal direction when they rotate around the axes of the sleeves 4 at both ends, thereby ensuring that the top plate 10 and its connected backrest or seat cushion support maintain a horizontal posture during lifting or tilting, avoiding swaying and offset during adjustment, and improving the comfort and structural stability of use. The wear-resistant sliding sleeve 7 in the rotating joint effectively reduces frictional resistance and wear, and the dustproof screw cover 9... The sealed structure ensures the long-term smoothness and cleanliness of the rotating parts. For the sofa backrest and armrest functional components, the motion transmission principle is the same as that of the basic functional components. They are all achieved through the linkage of the third rotating arm 17 and the fourth rotating arm 18. The difference lies in the end actuator of the motion chain: the backrest functional component is connected to the sofa backrest fixing block 23 through the damping bearing 22. The damping provides adjustable rotational resistance, allowing the backrest to be safely suspended at any angle. The armrest functional component is connected to the detachable sofa armrest fixing block 25 through the rotating plate 24, realizing the adjustment of the armrest angle and height. All three share the same base plate 1, sleeve 4, and rotating arm core module. This modular design not only simplifies the production and assembly process, but also enhances the adaptability of the product series to different sofa structures, ultimately achieving the technical effect of compact structure, smooth adjustment, convenient installation, and controllable cost.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sofa functional component, characterized in that, include: Bottom plate (1), top plate (10), perforation (3), first rotating arm (5) and second rotating arm (6); Both sides of the bottom plate (1) and the top plate (10) are provided with through holes (3). The bottom plate (1) and the top plate (10) are connected by a first rotating arm (5) and a second rotating arm (6). The first rotating arm (5) and the second rotating arm (6) are both bow-shaped structures. Both ends of the first rotating arm (5) and the second rotating arm (6) are fixed with sleeves (4), and the sleeves (4) are inserted through the inside of the through holes (3). A wear-resistant sliding sleeve (7) is fitted at the connection between the sleeve (4) and the through holes (3). A pin (8) with a threaded end is inserted into one end of the sleeve (4). A dustproof screw cap (9) is installed on the threaded end of the sleeve (4) near the pin (8).

2. A sofa functional component according to claim 1, characterized in that: The base plate (1) has a fixing hole (2) for connecting with the sofa frame. The dustproof screw cap (9) and the pin (8) form a threaded connection, and the dustproof screw cap (9) forms a sealing structure with the sleeve (4) through the pin (8) and the wear-resistant sliding sleeve (7).

3. A sofa functional component according to claim 1, characterized in that: The first rotating arm (5) and the second rotating arm (6) have opposite arc center directions, and the first rotating arm (5) and the second rotating arm (6) are respectively connected to the bottom plate (1) and the top plate (10) through the sleeve (4), the pin (8) and the dust cover (9).

4. A sofa functional component according to claim 1, characterized in that: A first corner block (11) is fixed to one side of the outer wall of the top plate (10), and a clamping block (12) is vertically fixed to the other side of the outer wall of the top plate (10). A connecting plate (13) is placed on the upper outer wall of the top plate (10). A second corner block (14) is fixed to the outer wall of the connecting plate (13) near the first corner block (11). A connecting bolt (15) is passed through the middle of the first corner block (11) and the second corner block (14). A buckle plate (16) is vertically fixed to the outer wall of the connecting plate (13) near the clamping block (12), and a gap is opened at the connection between the buckle plate (16) and the connecting plate (13) to facilitate the passage of the clamping block (12).

5. A sofa functional component according to claim 4, characterized in that: The outer wall of the first corner block (11) and the inner wall of the second corner block (14) are closely fitted together, and the top plate (10) is threadedly connected to the connecting plate (13) through the first corner block (11), the second corner block (14) and the connecting bolt (15).

6. A sofa functional component according to claim 4, characterized in that: The connecting plate (13) is connected to the top plate (10) by a snap-fit ​​plate (16) and a clamping block (12) to prevent the connecting plate (13) from shifting during adjustment.

7. A sofa backrest functional component, characterized in that, include: The base plate (1), fixing hole (2), through hole (3), sleeve (4), wear-resistant sliding sleeve (7), pin (8), dustproof screw cap (9) and third rotating arm (17) and fourth rotating arm (18) fixed on the upper outer wall of the sleeve (4). The top ends of the third rotating arm (17) and the fourth rotating arm (18) are both fixed with short sleeves (19). The two ends of the short sleeves (19) are connected to the upper support plate (20) through matching wear-resistant sliding sleeves (7), pins (8) and dustproof screw caps (9). The upper surface of one side of the upper support plate (20) is symmetrically installed with fixing plates (21) by bolts. The top end of the fixing plates (21) is connected with a damping bearing (22). The rotating part of the damping bearing (22) is fixed with a sofa back fixing block (23).

8. The sofa backrest functional component according to claim 7, characterized in that: The third rotating arm (17) and the fourth rotating arm (18) are rotatably connected to the base plate (1) through the sleeve (4), and the third rotating arm (17) and the fourth rotating arm (18) are rotatably connected to the upper support plate (20) through the short sleeve (19), and the sofa back fixing block (23) is rotatably connected to the fixing clamp (21) through the damping bearing (22).

9. A sofa armrest functional component, characterized in that, include: The base plate (1), fixing hole (2), through hole (3), sleeve (4), wear-resistant sliding sleeve (7), pin (8), dustproof screw cap (9) and third rotating arm (17) and fourth rotating arm (18) fixed on the upper outer wall of the sleeve (4). The top ends of the third rotating arm (17) and the fourth rotating arm (18) are both fixed with short sleeves (19). The two ends of the short sleeves (19) are connected to the upper support plate (20) through matching wear-resistant sliding sleeves (7), pins (8) and dustproof screw caps (9). The upper surface of one side of the upper support plate (20) is symmetrically installed with fixing clamps (21) by bolts. The top end of the fixing clamps (21) is connected with a damping bearing (22). The rotating part of the damping bearing (22) is fixed with a rotating plate (24). The outer surface of the rotating plate (24) is installed with a sofa armrest fixing block (25) by bolts.

10. The sofa armrest functional component according to claim 9, characterized in that: The sofa armrest fixing block (25) and the rotating plate (24) form a detachable structure, and the sofa armrest fixing block (25) is rotatably connected to the fixing plate (21) through the rotating plate (24), the damping bearing (22).

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