Sofa with adjustable backrest angle

Abstract

The utility model discloses a sofa with an adjustable backrest angle. The sofa comprises a backrest and a seat body, the backrest comprises a backrest support and a backrest bag arranged on the outer side of the backrest support in a wrapping mode, and a first rotating connecting piece is arranged on the backrest support. The seat body comprises a seat bag and a rack arranged in the seat bag, at least part of the rack extends to the position close to the backrest support, and a second rotating connecting piece is arranged on the portion, close to the backrest support, of the rack. The second rotary connecting piece is rotatably connected with the first rotary connecting piece, so that the backrest bracket can rotate relative to the rack. According to the sofa with the angle-adjustable backrest, the angle of the backrest of the sofa can be adjusted only by arranging the first rotating component and the second rotating component which are rotationally connected, so that the simplicity of the angle adjusting component of the sofa is improved, and the manufacturing cost is further reduced.

Description

Technical Field

[0001] This application relates to the technical field of furniture products, and particularly to a sofa with an adjustable backrest angle. Background Art

[0002] Backrest sofas are favored by consumers because of their comfortable backrests. However, in daily use, everyone has different heights and body shapes, so the requirements for the backrest angle will also vary.

[0003] In related technologies, in order to adjust the backrest angle, most of them set a rotating shaft at the sofa armrest and the sofa backrest, and then set a transmission device inside the sofa armrest and externally connect a control module to control the rotation of the rotating shaft. However, the adjustment structure of this sofa backrest is complex in design, resulting in a complex overall structure of the sofa. Utility Model Content

[0004] The utility model content discloses a sofa with an adjustable backrest angle, which is beneficial to improving the simplicity of the sofa backrest angle adjustment structure and also beneficial to reducing the manufacturing cost.

[0005] To achieve the above object, the utility model content discloses a sofa with an adjustable backrest angle, including:

[0006] A backrest, the backrest includes a backrest cushion and a backrest bracket, the backrest cushion is wrapped and arranged outside the backrest bracket, and the backrest bracket is provided with a first rotating connector; and

[0007] A seat body, the seat body includes a seat cushion and a frame, the frame is arranged inside the seat cushion, at least part of the frame extends to be adjacent to the backrest bracket, a second rotating connector is arranged on the part of the frame adjacent to the backrest bracket, one of the first rotating connector and the second rotating connector is provided with a first groove portion, the other is provided with a first shaft portion, and the first shaft portion is rotatably inserted into the first groove portion so that the first rotating connector and the second rotating connector can be rotatably connected, driving the backrest bracket to rotate relative to the frame.

[0008] As an optional implementation manner, the first groove portion is a long strip-shaped groove portion extending along a first direction, and the first shaft portion is rotatably and movably connected to the first groove portion along the first direction.

[0009] As an optional implementation manner, a plurality of first positioning teeth are arranged on the surface where the first groove portion is located, a plurality of second positioning teeth are arranged on the surface where the first shaft portion is located, and the second positioning teeth are configured to be engaged with the first positioning teeth when the first shaft portion moves along the first direction in the first groove portion.

[0010] As an optional embodiment, a first reference portion is provided on the first rotating connection member, and a second reference portion is provided on the second rotating connection member, and the second reference portion is configured to be aligned with the first reference portion to indicate an alignment position of the first shaft portion relative to the first groove portion.

[0011] As an optional embodiment, the backrest bracket includes two parallel and oppositely arranged legs and a cross bar connected between the two legs, the first rotating connection member is provided with a first groove portion, and when the second rotating connection member is provided with a first shaft portion, the leg is provided with a first avoidance hole corresponding to the first groove portion, and the first avoidance hole is connected to the first groove portion, and the first rotating connection member includes a plate portion and a clamping protrusion portion provided on one side of the plate portion in the thickness direction and protruding outward from the plate portion, the plate portion is provided with the first groove portion, the first groove portion passes through the clamping protrusion portion, and the clamping protrusion portion is clamped in the first avoidance hole;

[0012] The first shaft portion is rotatably arranged in the first groove portion and the first avoidance hole, and the second rotating connecting member is in contact with the plate portion.

[0013] As an optional embodiment, the first shaft portion passes through the first groove portion and the first avoidance groove to be located on the side of the leg away from the plate portion, the first shaft portion is hollow, and the hollow portion of the first shaft portion is configured to connect a first fastener to prevent the first shaft portion from detaching from the first groove portion.

[0014] As an optional embodiment, the support leg is further provided with a through second groove portion, and the second groove portion and the first groove portion are spaced apart along the height direction of the support leg. The backrest bracket also includes a fixing member, which is passed through the second groove portion, and the fixing member is hollow, and the hollow portion of the fixing member is configured to connect a second fastener to prevent the fixing member from detaching from the second groove portion.

[0015] As an optional embodiment, the backrest bracket also includes a pad, which is connected to the frame and the support leg, and a second avoidance hole and a third avoidance hole are provided on the pad corresponding to the first groove portion and the second groove portion, the second avoidance hole is connected to the first groove portion, and the third avoidance hole is connected to the second groove portion, so that the first shaft portion can be rotatably passed through the first groove portion and the second avoidance hole, and the fixing member is passed through the second groove portion and the third avoidance hole.

[0016] As an alternative embodiment, the frame includes a connecting plate connected to the leg. The connecting plate is provided with a first mounting hole and a second mounting hole, such that the first fastener passes through the first mounting hole and is connected to the first shaft portion, and the second fastener passes through the second mounting hole and is connected to the fixing member.

[0017] As an alternative embodiment, the frame further includes a limiting plate. The limiting plate forms a clamping space for clamping the connecting plate, and the limiting plate is connected to the leg. The limiting plate is provided with a first limiting hole and a second limiting hole corresponding to the first mounting hole and the second mounting hole, such that the first fastener passes through the first mounting hole and is connected to the first limiting hole and the first shaft portion, and the second fastener passes through the second mounting hole and is connected to the second limiting hole and the fixing member.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows:

[0019] A sofa with an adjustable backrest angle provided by the present utility model includes a backrest and a seat body. The backrest includes a backrest cushion and a backrest bracket disposed within the backrest cushion. The backrest bracket is provided with a first rotating connector. The seat body includes a seat cushion and a frame disposed within the seat cushion. At least a part of the frame extends adjacent to the backrest bracket. A second rotating connector is disposed on the part of the frame adjacent to the backrest bracket. One of the first rotating connector and the second rotating connector is provided with a first groove portion, and the other is provided with a first shaft portion. The first shaft portion is rotatably inserted through the first groove portion, such that the first rotating connector and the second rotating connector are rotatably connected, driving the backrest bracket to rotate relative to the frame. The sofa with an adjustable backrest angle disclosed in the present application realizes the rotational connection between the backrest bracket and the frame of the seat body through the first rotating connector and the second rotating connector. While being able to adjust the backrest angle, this setting method is also simpler and does not require an additional transmission device. Compared with the method of disposing a transmission device within the armrest and externally connecting a control module, it helps to reduce the complexity of the sofa backrest angle adjustment components, thereby helping to reduce the manufacturing cost, and also helps to flexibly adjust the sofa backrest angle according to the needs of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the first perspective of the sofa (partial structure omitted) disclosed in the embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the second perspective of the sofa (partial structure omitted) disclosed in the embodiment of the present application;

[0023] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0024] Figure 4 is Figure 3 the enlarged partial view at position B in

[0025] Figure 5 is Figure 4 the exploded structural view of

[0026] Figure 6 It is a schematic structural diagram of the first groove portion (a) and the first shaft portion (b) disclosed in the embodiment of the present application.

[0027] Description of reference numerals:

[0028] 100 - sofa; 1 - backrest; 11 - backrest support; 111 - leg; 1111 - first avoidance hole; 1112 - second groove portion; 112 - cross bar; 113 - fixing member; 114 - second fastener; 115 - backing plate; 1151 - second avoidance hole; 1152 - third avoidance hole; 12 - first rotating connecting member; 121 - first plate portion; 1211 - first groove portion; 1212 - first positioning tooth; 1213 - first reference portion; 1213a - first indicating groove; 122 - first convex portion; 2 - seat body; 21 - seat cushion; 22 - frame; 221 - connecting plate; 2211 - first mounting hole; 2212 - second mounting hole; 222 - limiting plate; 2221 - first protruding portion; 2221a - first limiting hole; 2222 - second protruding portion; 2222a - second limiting hole; 2223 - limiting groove; 23 - second rotating connecting member; 231 - first shaft portion; 2311 - second plate portion; 23111 - second positioning tooth; 23112 - second reference portion; 23112a - second indicating groove; 2312 - second convex portion; 2313 - first fastener; XY - first direction. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0031] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0032] In addition, the terms "install", "set", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, terms such as "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] At present, with the continuous upgrading of consumption concepts, traditional sofas with fixed angles and single functions can no longer meet consumers' pursuit of comfortable home furnishings. Functional sofas, with the advantage of adjustable backrest angles, gradually come into the view of consumers.

[0035] Generally speaking, sofas with higher backrests are suitable for situations such as reading and working that require maintaining a straight back, while sofas with lower backrests are suitable for leisure occasions such as relaxing and watching TV. By adjusting the different angles of the sofa backrest, different usage needs of users can be met.

[0036] In the related art, by setting a rotating shaft at the connection between the sofa armrest and the sofa backrest, the backrest can be adjusted to different angles relative to the seat body. However, this setting method also requires a transmission device connected to the rotating shaft to be arranged inside the sofa armrest, and at the same time, the transmission device is externally connected to a control module to be able to control the rotation of the rotating shaft. The overall angle adjustment device is relatively complex, and at the same time increases the overall manufacturing cost of the sofa.

[0037] In view of this, the embodiments of the present application disclose a sofa with an adjustable backrest angle. By providing a first rotating connector on the backrest support of the backrest, and at the same time providing a second rotating connector on the part of the frame of the seat body adjacent to the backrest support, the second rotating connector is rotatably connected to the first rotating connector, so that the backrest support can rotate relative to the frame, which helps to improve the simplicity of the rotating assembly of the sofa. In addition, one of the first rotating connector and the second rotating connector is provided with a first groove portion, the other is provided with a first shaft portion, and a plurality of first positioning teeth are provided on the first groove portion, and a plurality of second positioning teeth are provided on the first shaft portion. The second positioning teeth mesh with the first positioning teeth when the first shaft portion moves in the first groove portion in the first direction. This setting method helps the backrest to stay at the angle desired by the user when adjusting the backrest angle, thereby improving the convenience of backrest angle adjustment.

[0038] The technical solutions of the present application will be further described below in conjunction with the embodiments and the drawings.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. is a schematic structural diagram of the first perspective of the sofa (partial structure omitted) disclosed in the embodiments of the present application, Figure 2 FIG. is a schematic structural diagram of the second perspective of the sofa (partial structure omitted) disclosed in the embodiments of the present application. The sofa with an adjustable backrest angle disclosed in the present application includes a backrest 1 and a seat body 2. The backrest 1 includes a backrest cushion (not shown in the figure) and a backrest support 11. The backrest cushion is covered on the outside of the backrest support 11, and a first rotating connector 12 is provided on the backrest support 11. The seat body 2 includes a seat cushion 21 and a frame 22. The frame 22 is provided inside the seat cushion 21. The frame 22 extends at least partially to a position adjacent to the backrest support 11, and a second rotating connector 23 is provided on the part of the frame 22 adjacent to the backrest support 11. The second rotating connector 23 is rotatably connected to the first rotating connector 12, so that the backrest support 11 can rotate relative to the frame 22, and further the backrest 1 can rotate relative to the seat body 2 to adjust the angle of the backrest 1.

[0040] By respectively providing a first rotating connector 12 and a second rotating connector 23 on the backrest support 11 and the frame 22, and the two are rotatably connected, the angle adjustment of the backrest support 11 can be realized. This setting method is compared with the method of setting a rotating shaft at the connection between the backrest support 11 and the armrest, and then setting a transmission device inside the sofa armrest, and at the same time an external control module is required to control the rotation of the rotating shaft, which helps to improve the simplicity of the backrest rotation control device of the sofa, and further helps to reduce the manufacturing cost of the sofa.

[0041] It can be understood that the materials of the above-mentioned backrest bracket 11 and the frame 22 can be natural wood, artificial board or metal. Natural wood has a relatively high hardness and good stability. Using natural wood for the backrest bracket 11 and the frame 22 helps to improve the hardness and stability of the sofa 100, and thus helps to increase the service life of the sofa 100. Artificial board has a lower price and excellent waterproof, wear-resistant, insect-proof and anti-corrosion characteristics. Using artificial board for the backrest bracket 11 and the frame 22 helps to improve the waterproof and wear-resistant properties of the sofa 100, and thus helps to increase its service life. Metal materials have high strength, good elasticity and strong toughness. Using metal for the backrest bracket 11 and the frame 22 helps to improve the load-bearing capacity of the sofa 100, and the sofa 100 is not easily deformed after long-term use.

[0042] In some embodiments, please refer to Figures 2 to 5 , Figure 3 which Figure 2 is a cross-sectional view taken along line A-A in Figure 4 and Figure 3 is a partial enlarged view at position B in Figure 5 and Figure 4 is an exploded view of the structure of . There can be various embodiments for the above-mentioned first rotating connector 12 and the second rotating connector 23. In one example, the first rotating connector 12 is provided with a first groove portion 1211, and correspondingly, the second rotating connector 23 is provided with a first shaft portion 231. The first shaft portion 231 can rotatably pass through the first groove portion 1211 so that the first rotating connector 12 and the second rotating connector 23 can be rotatably connected. In another example, conversely, the first rotating connector 12 can be provided with a first shaft portion 231, and correspondingly, the second rotating connector 23 is provided with a first groove portion 1211. The method of using the connection between the shaft portion and the groove portion to achieve rotation has a simple structure and can adjust the rotation amplitude according to actual rotation needs. The structure is simple and the rotation is easy to achieve, which is beneficial to improving the convenience of backrest angle adjustment.

[0043] In this embodiment, the first rotating connector 12 is provided with a first groove portion 1211 and the second rotating connector 23 is provided with a first shaft portion 231 as an example.

[0044] In some embodiments, please refer to Figures 2 to 5 , the backrest bracket 11 includes two legs 111 arranged in parallel and facing each other, and a cross bar 112 connected between the two legs 111. A first avoidance hole 1111 corresponding to the first groove portion 1211 is provided on the leg 111, and the first avoidance hole 1111 communicates with the first groove portion 1211. The first avoidance hole 1111 avoids the first groove portion 1211 so that the first groove portion 1211 can be penetrated through the leg 111, which helps to increase the connection stability between the first groove portion 1211 and the leg 111.

[0045] It can be understood that there are various embodiments for the above-mentioned first rotating connecting member 12 to be fixed to the leg 111. In one example, the first rotating connecting member 12 can be fixed to the leg 111 by stamping. The stamping process has high production efficiency, low cost, and strong adaptability, which helps to improve the efficiency and economy of fixing the first rotating connecting member 12 and the leg 111. In another example, the first rotating connecting member 12 can be fixed to the leg 111 by welding. The welding process has good connection performance, large structural stiffness, and is easy to automate, which helps to improve the stiffness of fixing the first rotating connecting member 12 and the leg 111 and enables mass production.

[0046] Optionally, Figure 4 and Figure 5 , the first rotating connecting member 12 includes a first plate portion 121 and a first convex portion 122 disposed on one side in the thickness direction of the first plate portion and protruding outward from the plate portion. The first groove portion 1211 is provided on the first plate portion 121, and the first groove portion 1211 penetrates through the first convex portion 122. At the same time, the first convex portion 122 is engaged in the first avoidance hole 1111. The first rotating connecting member adopts a structure including the first plate portion 121 and the first convex portion 122, which helps to improve the connection stability between the first rotating connecting member 12 and the leg 111.

[0047] In addition, the first convex portion 122 of the first rotating connecting member 12 passes through the first avoidance hole 1111, and at the same time, the first plate portion 121 of the first rotating connecting member 12 abuts against the leg 111. This setting method enables the first avoidance hole 1111 to provide certain support for the first rotating connecting member 12, and thus helps to improve the connection stability between the first rotating connecting member 12 and the leg 111.

[0048] Optionally, please refer to Figure Figure 4 and Figure 5 , the first groove portion 1211 is a long strip-shaped groove portion extending in the first direction, and the first shaft portion 231 is rotatably and movably connected to the first groove portion 1211 along the first direction. The first groove portion 1211 is provided as a long strip shape, which helps to increase the movement range of the first shaft portion 231 along the first direction, and thus helps to increase the angle adjustment range of the backrest bracket 11 relative to the frame 22. The first shaft portion 231 is rotatably and movably inserted through the first groove portion 1211 and the first avoidance hole 1111 along the first direction, and at the same time, the first shaft portion 231 abuts against the first plate portion 121. This setting method enables the first groove portion 1211 to provide certain support for the first shaft portion 231, helps to improve the connection stability between the first shaft portion 231 and the first groove portion 1211, and thus helps to improve the connection stability between the first shaft portion 231 and the plate portion.

[0049] In some embodiments, please refer toFigures 4 to 6 , Figure 6 is a schematic structural view of the first groove portion and the first shaft portion disclosed in the embodiments of the present application. Optionally, the second rotating connector 23 can be a screw. The second rotating connector 23 includes a second plate portion 2311 and a second convex portion 2312 that is disposed on one side in the thickness direction of the second plate portion 2311 and protrudes outward from the second plate portion 2311. The first plate portion 121 and the second plate portion 2311 are in contact with each other, and the second convex portion 2312 passes through the first convex portion 122. Adopting this method helps to improve the connection stability between the second rotating connector and the first rotating connector.

[0050] Optionally, a plurality of first positioning teeth 1212 are disposed on the surface of the first plate portion 121 facing the second plate portion 2311. At the same time, a plurality of second positioning teeth 23111 are disposed on the surface of the second plate portion 2311 facing the first plate portion 121. The second positioning teeth 23111 can be engaged with the first positioning teeth 1212 when the first shaft portion 231 moves in the first groove portion 1211 in the first direction. By providing the first positioning teeth 1212 and the second positioning teeth 23111, it is helpful to increase the rotational damping when the backrest 1 adjusts the angle relative to the seat body 2. In addition, the first positioning teeth 1212 and the second positioning teeth 23111 also help to maintain the current rotational angle after the user rotates to a suitable position, playing a positioning role.

[0051] It can be understood that the first positioning teeth 1212 and the second positioning teeth 23111 are arranged to extend perpendicular to the first direction, so that the first shaft portion 231 generates different gears in the first direction when moving in the first groove portion 1211. Each time the first positioning teeth 1212 and the second positioning teeth 23111 rotate, the clamping angle of the backrest relative to the seat body changes approximately one degree, which helps the user to conveniently understand the specific adjustment position of the backrest relative to the seat body.

[0052] Optionally, please refer to Figures 4 to 6On the above-mentioned first plate portion 121, a first reference portion 1213 is provided. The first reference portion 1213 includes two first indicating grooves 1213a symmetrically arranged along the first direction. At the same time, on the above-mentioned second plate portion 2311, a second reference portion 23112 is provided. The second reference portion 23112 also includes two second indicating grooves 23112a symmetrically arranged along the first direction corresponding to the first reference portion. The second reference portion 23112 is configured to be aligned with the first reference portion 1213. When the first indicating groove 1213a and the second indicating groove 23112a are engaged, the user can feel an obvious damping change to indicate the alignment position of the first shaft portion 231 relative to the first groove portion 1211. By providing the corresponding first reference portion 1213 and second reference portion 23112, it helps to indicate the angular situation between the current first shaft portion 231 and the first groove portion 1211 to the user, facilitating the user to judge and make corresponding adjustments.

[0053] It can be understood that, please refer to Figures 4 to 6 , the above-mentioned first indicating groove 1213a is at the central position of the first plate portion 121 along the first direction, and the above-mentioned second indicating groove 23112a is provided at the central position of the second plate portion 2311 along the first direction. By setting the indicating groove at the central position and combining with the first groove portion 1211 being a long strip-shaped groove extending along the first direction, the first shaft portion 231 can move forward or backward along the first direction relative to the first groove portion 1211, which helps to improve the movement flexibility between the first shaft portion 231 and the first groove portion 1211, and further helps to improve the flexibility of the backrest angle adjustment to meet the different usage requirements of users.

[0054] It can be understood that the above-mentioned first reference portion 1213 and second reference portion 23112 are default to be aligned. If multiple sofas 100 mentioned in the above-mentioned embodiments are placed side by side for use, when the backrest angles of the sofas 100 are inclined after a long time of use, resulting in misalignment of multiple backrests 1, or due to human reasons during the transportation or installation of the sofas 100, causing misalignment of the angles of multiple backrests 1, the positions between the first reference portion 1213 and the second reference portion 23112 can be checked. If it is found that the first reference portion 1213 and the second reference portion 23112 are misaligned, then adjust the positions between the first positioning teeth 1212 and the second positioning teeth 23111 to align the first reference portion 1213 and the second reference portion 23112, and then the backrests 1 of multiple sofas 100 can be aligned.

[0055] In some embodiments, please refer to Figures 4 to 6, the above-mentioned first shaft portion 231 is disposed through the first groove portion 1211 and the first avoidance hole 1111, so that the first shaft portion 231 is located on the side of the leg 111 away from the first plate portion 121. The second convex portion 2312 of the first shaft portion 231 is hollowly disposed along the thickness direction of the leg 111, and the hollow portion is configured to connect the first fastener 2313 to prevent the first shaft portion 231 from detaching from the first groove portion 1211, which helps to improve the stability of the first shaft portion 231 in the first groove portion 1211.

[0056] Optionally, please refer to Figures 4 to 6 , if the above-mentioned first shaft portion 231 is a movable nut, then the inner wall surface of the hollow of the second convex portion 2312 is provided with threads, and the corresponding first fastener 2313 is a bolt. The first fastener 2313 is threadedly connected to the second convex portion 2312, which helps to improve the connection stability between the first fastener 2313 and the first shaft portion 231, and further helps to prevent the first shaft portion 231 from detaching from the first groove portion 1211.

[0057] In some embodiments, please refer to Figures 4 to 6 , a through second groove portion 1112 is further provided on the leg 111, and the second groove portion 1112 and the above-mentioned first groove portion 1211 are spaced apart along the height direction of the leg 111. The backrest bracket 11 further includes a fixing member 113, and the fixing member 113 is disposed through the second groove portion 1112, and the fixing member 113 is hollowly disposed and extends along the thickness direction of the leg 111. By providing the fixing member, it helps to improve the connection stability between the backrest bracket and the frame. The hollow portion is configured to connect the second fastener 114 to prevent the fixing member 113 from detaching from the second groove portion 1112, which helps to improve the stability of the fixing member 113 in the second groove portion 1112.

[0058] Optionally, please refer to Figures 4 to 6 , the above-mentioned fixing member 113 is preferably a four-claw nut. The inner wall surface of the hollow of the four-claw nut is provided with threads, and the corresponding second fastener 114 is a bolt. The second fastener 114 is threadedly connected to the fixing member 113, which helps to improve the connection stability between the second fastener 114 and the fixing member 113, and further helps to prevent the second fastener 114 from detaching from the second groove portion 1112. At the same time, compared with using an ordinary nut, the four-claw nut has better fixing property on the leg 111, which helps to improve the connection stability between the four-claw nut and the leg 111, and further helps to avoid the second fastener 114 from detaching from the second groove portion 1112.

[0059] It can be understood that the preferred way to fix the above-mentioned fixing member 113 to the leg 111 is stamping fixation. Compared with other fixing methods, the stamping method helps to better fix the claws of the four-claw nut in the second groove portion 1112, thereby helping to improve the stability of the four-claw nut, and further improving the stability of the second fastener 114, so as to improve the overall stability of the sofa.

[0060] It can be understood that the materials of the above-mentioned first fastener 2313, second fastener 114, first shaft portion 231 and fixing portion can be selected from carbon steel, stainless steel, copper, etc. Carbon steel has low cost and good mechanical properties, and is suitable for application scenarios with high requirements for strength and hardness; stainless steel has good corrosion resistance and acid resistance, and is suitable for special application scenarios that require corrosion resistance and acid resistance; copper has good electrical conductivity and corrosion resistance, and is suitable for application scenarios with high requirements for electrical conductivity and corrosion resistance. This embodiment does not make specific limitations in this regard.

[0061] In some embodiments, please refer to Figures 4 to 6 , the backrest bracket 11 further includes a backing plate 115, which is connected to the frame 22 and the leg 111. The backing plate 115 is provided with a second avoidance hole 1151 and a third avoidance hole 1152 corresponding to the first groove portion 1211 and the second groove portion 1112. The second avoidance hole 1151 communicates with the first groove portion 1211 to avoid the first shaft portion 231, so that the first shaft portion 231 can rotatably pass through the first groove portion 1211 and the second avoidance hole 1151. The third avoidance hole 1152 communicates with the second groove portion 1112 to avoid the fixing member 113, so that the fixing member 113 passes through the second groove portion 1112 and the third avoidance hole 1152. By providing the backing plate 115 and connecting it between the frame 22 and the leg 111, it helps to protect the leg 111 from frictional damage during installation and backrest adjustment, and further helps to improve the service life of the sofa. On the other hand, adding the backing plate 115 also helps to disperse the forces received by the first groove portion 1211 and the second groove portion 1112, thereby reducing their deformation, and further helping to prevent the first fastener 2313 and the second fastener 114 from loosening, and helping to maintain the stability of the sofa.

[0062] Optionally, please refer to Figures 4 to 6, the frame 22 includes a connecting plate 221 which is connected to the side of the backing plate 115 away from the leg 111. First mounting holes 2211 and second mounting holes 2212 are spaced along the height direction of the connecting plate 221. The first mounting hole 2211 is for the first fastener 2313 to pass through and connect with the first shaft portion 231, and the second mounting hole 2212 is for the second fastener 114 to pass through and connect with the fixing member 113, so as to connect the leg 111 and the frame 22. By providing the first mounting hole 2211 and the second mounting hole 2212, it helps to position the installation positions of the first fastener 2313 and the second fastener 114, ensuring that the first fastener 2313 can pass through the connecting plate 221 and connect with the first shaft portion 231, and ensuring that the second fastener 114 can pass through the connecting plate 221 and connect with the fixing member 113. In addition, the first mounting hole 2211 and the second mounting hole 2212 are also used to fix the first fastener 2313 and the second fastener 114, firmly fixing the connecting plate 221 on the first groove portion 1211 and the leg 111, which helps to increase the stability of the sofa structure.

[0063] Optionally, please refer to Figures 4 to 6 , the frame 22 further includes a limiting plate 222 which is connected between the connecting plate 221 and the backing plate 115. A first protruding portion 2221 and a second protruding portion 2222 protruding towards the backing plate 115 along the thickness direction are provided on the limiting plate 222. The first protruding portion 2221 and the second protruding portion 2222 are spaced along the length direction of the limiting plate 222. The first protruding portion 2221 is engaged in the first avoiding hole 1111, and the second protruding portion 2222 is engaged in the second groove portion 1112. This setting method of the first protruding portion 2221 and the second protruding portion 2222 helps to connect the limiting plate 222 with the backing plate 115 more accurately, and thus helps to improve the stability of the sofa.

[0064] Optionally, please refer to Figures 4 to 6, a first limiting hole 2221a is provided on the first convex portion 2221 corresponding to the first mounting hole 2211, and a second limiting hole 2222a is provided on the second convex portion corresponding to the second mounting hole 2212. A limiting groove 2223 is provided along the outer periphery of the limiting plate 222. The limiting groove 2223 is used to clamp the limiting plate 222, so that the first mounting hole 2211 and the first limiting hole 2221a are communicated, so that the first fastener 2313 passes through the first mounting hole 2211 and the first limiting hole 2221a to be connected to the first shaft portion 231, so that the second mounting hole 2212 and the second limiting hole 2222a are communicated, so that the second fastener 114 passes through the second mounting hole 2212 and the second limiting hole 2222a to be connected to the fixing member 113. The arrangement of the limiting groove 2223 helps to position the installation position of the connecting plate 221, so that the connecting plate 221, the limiting plate 222, the backing plate 115 and the leg 111 can be accurately connected. Furthermore, the first fastener 2313 can be accurately connected to the first shaft portion 231, and the second fastener 114 can be accurately connected to the fixing member 113, which helps to improve the structural stability of the sofa.

[0065] In one example, please refer to Figures 1 to 6 , when both the first fastener 2313 and the second fastener 114 are M6 bolts, the first shaft portion 231 and the fixing member 113 correspondingly are nuts with M6 internal threads. The distance between the multiple first positioning teeth 1212 is 1 millimeter. The ratio of the distance from the fixing member 113 to the top of the leg 111 to the distance from the fixing member 113 to the bottom of the leg 111 is 5.8:1. At this time, when the first shaft portion 231 moves a distance of one positioning tooth relative to the first groove portion 1211, the top edge of the backrest correspondingly offsets 5.8 millimeters in the first direction.

[0066] The following briefly describes the process of adjusting the angle of the backrest:

[0067] By pushing the top end of the backrest 1 in the first direction, the user can make the first rotating connecting member 12 on the backrest bracket 11 rotate relative to the second rotating connecting member 23, so as to drive the first positioning teeth 1212 to move in the first direction in the first groove portion 1211 and engage with different second positioning teeth 23111. The user can judge the gear position of the angle adjustment of the backrest 1 through the damping feeling. When the angle feels appropriate at this time, stop pushing the top end of the backrest 1, and the backrest 1 can be fixed at the current angle.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sofa with an adjustable backrest angle, characterized in that: The sofa with adjustable backrest angle comprises: A backrest, the backrest comprising a backrest bag and a backrest bracket, the backrest bag is arranged to cover the outer side of the backrest bracket, and the backrest bracket is provided with a first rotating connecting member; and A seat body, the seat body includes a seat bag and a frame, the frame is arranged in the seat bag, the frame at least partially extends to be arranged adjacent to the backrest bracket, the portion of the frame adjacent to the backrest bracket is provided with a second rotating connection member, one of the first rotating connection member and the second rotating connection member is provided with a first groove portion, and the other is provided with a first shaft portion, the first shaft portion can be rotatably passed through the first groove portion, so that the first rotating connection member and the second rotating connection member can be rotatably connected, driving the backrest bracket to rotate relative to the frame.

2. The sofa with adjustable backrest angle according to claim 1, characterized in that: The first groove portion is a long strip-shaped groove portion extending along a first direction, and the first shaft portion is rotatably and movably connected to the first groove portion along the first direction.

3. The sofa with adjustable backrest angle according to claim 2, characterized in that: A plurality of first positioning teeth are disposed on the surface where the first groove portion is located, and a plurality of second positioning teeth are disposed on the surface where the first shaft portion is located. The second positioning teeth are configured to mesh with the first positioning teeth when the first shaft portion moves in the first groove portion along the first direction.

4. The sofa with adjustable backrest angle according to claim 1, characterized in that: A first reference portion is disposed on the first groove portion, and a second reference portion is disposed on the first shaft portion. The second reference portion is configured to be aligned with the first reference portion to indicate an aligned position of the first shaft portion relative to the first groove portion.

5. The sofa with adjustable backrest angle according to any one of claims 1 to 4, characterized in that: The backrest bracket includes two parallel and oppositely arranged legs and a crossbar connected between the two legs, the first rotating connection member is provided with a first groove portion, and when the second rotating connection member is provided with a first shaft portion, the legs are provided with a first avoidance hole corresponding to the first groove portion, and the first avoidance hole is connected with the first groove portion, and the first rotating connection member includes a plate portion and a clamping protrusion portion provided on one side in the thickness direction of the plate portion and protruding outward from the plate portion, the plate portion is provided with the first groove portion, the first groove portion passes through the clamping protrusion portion, and the clamping protrusion portion is clamped in the first avoidance hole; The first shaft portion is rotatably inserted into the first groove portion and the first avoidance hole, and the first shaft portion abuts against the plate portion.

6. The sofa with adjustable backrest angle according to claim 5, characterized in that: The first shaft portion passes through the first groove portion and the first avoidance hole to be located on the side of the leg away from the plate portion. The first shaft portion is hollow, and the hollow portion of the first shaft portion is configured to connect a first fastener to prevent the first shaft portion from detaching from the first groove portion.

7. The sofa with adjustable backrest angle according to claim 6, characterized in that: The support leg is also provided with a through second groove portion, and the second groove portion and the first groove portion are spaced apart along the height direction of the support leg. The backrest bracket also includes a fixing piece, which is passed through the second groove portion and is hollow. The hollow portion of the fixing piece is configured to connect a second fastener to prevent the fixing piece from being separated from the second groove portion.

8. The sofa with adjustable backrest angle according to claim 7, characterized in that: The backrest bracket also includes a pad, which is connected to the frame and the support leg. The pad is provided with a second avoidance hole and a third avoidance hole corresponding to the first groove portion and the second groove portion. The second avoidance hole is communicated with the first groove portion so that the first shaft portion can be rotatably passed through the first groove portion and the second avoidance hole. The third avoidance hole is communicated with the second groove portion, and the fixing piece is passed through the second groove portion and the third avoidance hole.

9. The sofa with adjustable backrest angle according to claim 7, characterized in that: The frame includes a connecting plate, which is connected to the supporting leg. A first mounting hole and a second mounting hole are provided on the connecting plate, so that the first fastener is passed through the first mounting hole to be connected to the first shaft portion, and the second fastener is passed through the second mounting hole to be connected to the fixing member.

10. The sofa with adjustable backrest angle according to claim 9, characterized in that: The frame also includes a limit plate, which is formed with a clamping space to clamp the connecting plate, and the limit plate is connected to the support leg. The limit plate is provided with a first limit hole and a second limit hole corresponding to the first mounting hole and the second mounting hole, so that the first fastener is passed through the first mounting hole and connected with the first limit hole and the first shaft portion, and the second fastener is passed through the second mounting hole and connected with the second limit hole and the fixing member.

Images