Double-circle-shaped sofa armrest framework and double-circle-shaped sofa armrest

Abstract

The utility model relates to the field of sofa furniture design and manufacture, especially a double circle modeling sofa armrest framework and double circle modeling sofa armrest, a double circle modeling sofa armrest framework, including lower armrest frame and the upper armrest frame of setting on it, the upper armrest frame and lower armrest frame jointly define the double cylinder external contour of superposition, the overall height of upper armrest frame is less than its corresponding upper cylinder contour height, and its top and outside are the open area of no framework support, to allow the flexible core body to fill in the area and bulge upwards and outward, form the soft arc contact surface, the scheme has the advantage of significantly improving user comfort.

Description

Technical Field

[0001] This utility model relates to the field of sofa furniture design and manufacturing, and in particular to a double-circle sofa armrest frame and a double-circle sofa armrest. Background Technology

[0002] In the design and manufacturing of sofa furniture, armrests, as an important component, not only provide structural support but also greatly influence the overall aesthetics and comfort of the product. Currently, most sofa armrests on the market are simple square or cylindrical shapes, which appear visually monotonous and lack a sense of layering and design.

[0003] To achieve richer visual effects, some designs propose double-layered or composite handrail structures. However, these designs often focus on the form itself, neglecting the impact of the internal skeletal structure on the final comfort. For example, if a fully enclosed ring-shaped frame is used for the upper handrail in pursuit of a complete double-layered cylindrical shape, the top and outer sides will feel hard due to the presence of the internal wooden frame, causing discomfort to the user's arms during prolonged use and failing to meet the modern home's pursuit of a soft touch and ultimate comfort.

[0004] On the other hand, existing armrest frame structures often suffer from complex structures and low production and assembly efficiency when realizing complex shapes. Complex connection methods not only increase manufacturing costs but may also affect the overall structural stability. Therefore, the market urgently needs a sofa armrest solution that can combine a unique double-circle design with superior comfort, while also considering structural rationality and ease of production. Summary of the Invention

[0005] In order to solve the above problems, the purpose of this utility model is to provide a double-circle sofa armrest frame and a double-circle sofa armrest, which has the advantage of significantly improving user comfort.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A double-cylinder sofa armrest frame includes a lower armrest frame and an upper armrest frame disposed thereon. The upper armrest frame and the lower armrest frame together define the outer contour of the stacked double cylinders. The overall height of the upper armrest frame is less than the height of its corresponding upper cylinder contour, and its top and outer sides are open areas without frame support, so as to allow a flexible core to fill the area and bulge upward and outward to form a soft arc-shaped contact surface.

[0008] Further, the present application further provides that the upper armrest frame comprises an upper front plate assembly, an upper rear plate assembly, a plurality of upper cross beams connecting the foregoing two components, and an upper supporting plate disposed at the bottom of the frame; the upper front plate assembly is a lower semicircular member, the upper rear plate assembly is an inner semicircular member, and the arc side of the upper rear plate assembly faces the inner side of the sofa seat, thereby jointly defining an open area without骨架 support at the top and outer side of the upper armrest frame.

[0009] Further, the present application further provides that the lower armrest frame comprises a lower front plate assembly, a lower rear plate assembly, a plurality of lower cross beams connecting the foregoing two components, and a lower supporting plate disposed at the top of the frame. Both the lower front plate assembly and the lower rear plate assembly are configured as circular members.

[0010] Further, the present application further provides that the sofa further comprises a bottom load-bearing frame, which comprises: a Japanese-shaped base plate; two end plates arranged front and back, connected above the front and rear beams of the base plate through mortise and tenon structures, each end plate comprises an integrally formed arc connecting portion and a side plate connecting portion, the arc connecting portion is semicircular and the arc side thereof faces the inner side of the sofa seat; a side plate, the lower end of which is connected to the side edge of the base plate through a mortise and tenon structure, and the front end and the rear end of which are respectively connected to the side plate connecting portions of the front and rear end plates through mortise and tenon structures.

[0011] Further, the present application further provides that a plurality of mortise eyes are provided on the arc edge of the arc connecting portion, and a plurality of strip-shaped through grooves are formed on the straight edge of the arc connecting portion; the lower cross beams comprise inserting cross beams and penetrating cross beams; two ends of the inserting cross beam are provided with tenons, and the tenons are inserted into the mortise eyes on the arc connecting portion; the penetrating cross beam penetrates the strip-shaped through grooves on the straight edge of the arc connecting portion; the lower armrest frame is connected to the end plate through the inserting cross beam and the penetrating cross beam; the semicircular profile of the arc connecting portion enables the lower armrest frame to form an open area without骨架 support on the outer side away from the vertical edge.

[0012] Further, the present application further provides that an intermediate vertical plate is further included, which is erected on the intermediate beam of the base plate through a mortise and tenon structure, and a strip-shaped through groove is formed on the vertical edge of the intermediate vertical plate; the middle part of the inserting cross beam is supported on the intermediate vertical plate, and the penetrating cross beam simultaneously penetrates the strip-shaped through groove on the intermediate vertical plate.

[0013] Further, the present application further provides that two ends of the lower supporting plate are connected with the lower front plate assembly and the lower rear plate assembly through mortise and tenon structures, and the middle part of the lower supporting plate is erected on the upper end of the intermediate vertical plate.

[0014] Further, the present application further provides a double-circular shaped sofa armrest, which comprises the above double-circular shaped sofa armrest framework, and further comprises a flexible core filled outside the framework to form the outer profile of double cylinders and a fabric covering the outer surface; the flexible core comprises a semi-cylindrical core adapted to the upper armrest frame, and the semi-cylindrical core is directly buckled and covers the open area without骨架 support of the upper armrest frame to form a full arc-shaped contact surface.

[0015] Furthermore, this application also proposes that the upper front panel assembly is composed of two symmetrically arranged quarter-circle plates forming a forward-opening upper groove between them; and / or, the lower front panel assembly is provided with a forward-opening lower groove.

[0016] Furthermore, this application also proposes that decorative strips be embedded in the upper and / or lower grooves; or that the lower groove extends downward and a downwardly extending support rod is fixedly connected therein.

[0017] As can be seen from the above, the double-circle sofa armrest frame and double-circle sofa armrest provided in this application are designed with the top and outer sides of the upper armrest frame as open areas without frame support, so that the flexible core can be naturally filled and bulge upward and outward to form a soft arc-shaped contact surface, which effectively avoids the oppressive feeling caused by rigid frame support and has the advantage of significantly improving user comfort. Attached Figure Description

[0018] Figure 1 A three-dimensional schematic diagram of a double-circle sofa armrest frame provided in this application. Figure 1 .

[0019] Figure 2 A three-dimensional schematic diagram of a double-circle sofa armrest frame provided in this application. Figure 2 .

[0020] Figure 3 The diagram provided for this application is of the upper armrest frame.

[0021] Figure 4 The diagram provided for this application is of the lower handrail frame.

[0022] Figure 5 This application provides a schematic diagram of the bottom load-bearing frame. Figure 1 .

[0023] Figure 6 This application provides a schematic diagram of the bottom load-bearing frame. Figure 2 .

[0024] Figure 7 A schematic diagram of a double-circle sofa armrest with decorative elements.

[0025] Figure 8 A schematic diagram of a double-circle sofa armrest designed to provide support legs. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] Example 1:

[0032] like Figure 1-6 As shown in the illustration, this application proposes a double-cylinder sofa armrest frame, including a lower armrest frame 1 and an upper armrest frame 2 disposed thereon. The upper armrest frame 2 and the lower armrest frame 1 together define the outer contour of the stacked double cylinders. The overall height of the upper armrest frame 2 is less than the height of its corresponding upper cylinder contour, and its top and outer sides are open areas 100 without frame support, allowing the flexible core 20 to fill the area and bulge upwards and outwards, forming a soft, curved contact surface. The outer contour of the double cylinders can be understood as an external form composed of two stacked cylinder shapes, which can be achieved in various ways. This contour design is mainly used to ensure visual hierarchy and structural harmony. Furthermore, the feature that the overall height of the upper armrest frame 2 is less than the height of its corresponding upper cylinder contour can be achieved by adjusting the longitudinal dimension of the upper armrest frame 2. For example, during the manufacturing process, the height of the upper armrest frame 2 is set to 50%-90% of the height of the upper cylinder contour, thereby naturally forming a gap in the space at the top and outer sides. This design primarily aims to reserve an open area 100 without frame support in a specific region. In practical applications, the open area 100 without frame support refers to the area on the top and outer side of the upper handrail frame 2 where no rigid support structure is provided. This area can be formed by reducing or removing transverse or longitudinal support members in a traditional frame, with the aim of providing sufficient space for the filling of the flexible core 20.

[0033] The flexible core 20 can be filled with various materials, such as high-density sponge, memory foam, or latex, which are elastic and stretchable. Once filled into the open area 100, these materials naturally extend upwards and outwards, ultimately forming an ergonomically curved contact surface. The main purpose of this design is to prevent the rigid frame from directly contacting the arm, thereby improving the leaning experience.

[0034] The innovation of this application lies in adjusting the structural design of the upper armrest frame 2, thereby eliminating the constraints of the rigid frame at the top and outer sides of the upper armrest while preserving the aesthetic effect of the double-circle design. This improvement solves the problem of rigidity caused by the frame support in the upper armrest of traditional double-circle sofas, thus enhancing the user's leaning comfort. Furthermore, this design achieves a complex shape while also considering structural rationality and ease of production, providing a new solution for sofa armrest design.

[0035] Specifically, the lower armrest frame 1 and the upper armrest frame 2, mounted on top of it, together form the basic skeleton, providing the necessary structural support for the double-circle shape. The upper armrest frame 2 works in concert with the lower armrest frame 1 to define the outer contour of the stacked double cylinders, ensuring a visually distinct double-circle effect and enhancing the product's design appeal. Furthermore, the overall height of the upper armrest frame 2 is designed to be less than the height of its corresponding upper cylinder contour. This feature prevents the frame from completely covering the top and outer side of the upper cylinder, naturally creating a spatial gap. Therefore, the top and outer areas of the upper armrest frame 2 are designated as open areas 100 without skeleton support, directly eliminating the rigid skeleton constraints in this area and creating the necessary conditions for the filling of the flexible core 20. Specifically, the flexible core 20 can fill this open area 100 and freely extend upwards and outwards without skeleton constraints, ultimately forming an ergonomically designed, soft, curved contact surface. For example, in practical use, the raised portion of the flexible core 20 can conform to the natural posture of the user's arm, avoiding direct contact between the rigid frame and the arm, thereby significantly improving the comfort of leaning. As a preferred implementation method, the various technical features work closely together. The height difference design is a prerequisite for the formation of the open area 100, which provides physical space for the core filling. The raised core provides a soft touch. The three work together to completely solve the comfort defects caused by the hardness of the upper armrest while retaining the aesthetic appeal of the double-circle shape.

[0036] like Figure 3 As shown, the upper armrest frame 2 includes an upper front panel assembly 3, an upper rear panel assembly 4, multiple upper crossbeams 5 connecting the two, and an upper support plate 6 located at the bottom of the frame. The upper front panel assembly 3 is a lower semi-circular component, and the upper rear panel assembly 4 is an inner semi-circular component, with its arc side facing the inside of the sofa seat, thus jointly defining the frameless open area 100 at the top and outer sides of the upper armrest frame 2. Specifically, the upper front panel assembly 3 refers to a structural component that only covers the lower half of the front part of the frame. It can be made by stamping metal sheets or cutting wood materials. The purpose is to avoid the full circular component covering the top, allowing the top area to be naturally open and creating the necessary space for the flexible core 20 to bulge upwards. The upper rear panel assembly 4 can be understood as an arc-shaped component with a specific orientation. It can be manufactured by injection molding or wood bending processes. Its purpose is to create a straight edge on the outer side by having the arc side facing the inside of the seat, thereby allowing the flexible core 20 to expand outwards to form a full arc surface. The upper crossbeam 5 refers to the supporting component used to connect the upper front panel assembly 3 and the upper rear panel assembly 4. It can be made of metal tubing or wooden strips and mainly serves to enhance the overall structural stability.

[0037] In detail, this technical solution achieves the overall structure of the upper armrest frame 2 through modular component division. The upper front panel component 3, as the lower semi-circular component, cooperates with the inner semi-circular component of the upper rear panel component 4. The two are stably connected by multiple upper crossbeams 5, forming a stable U-shaped cross-section structure. This specific shape and relative positional relationship ensures that the open area 100 without frame support at the top and outside can be precisely formed. At the same time, the upper support plate 6 set at the bottom of the frame not only provides the necessary support function, but also forms a complete frame system together with other components. Through this structural design, the problem of hard touch caused by frame coverage is effectively solved, significantly improving the comfort performance of the armrest, while also simplifying the assembly process and improving production efficiency. This design is particularly suitable for sofa armrest frames with double cylindrical outer contours that require filling with flexible core 20.

[0038] like Figure 4 As shown, the lower handrail frame 1 includes a lower front panel assembly 7, a lower rear panel assembly 8, multiple lower crossbeams connecting the two, and a lower support plate 10 located at the top of the frame. Both the lower front panel assembly 7 and the lower rear panel assembly 8 are constructed as circular components. In practical applications, the lower front panel assembly 7 refers to the structural component forming the front boundary of the lower handrail frame 1, aiming to provide precise front support for the lower cylindrical profile. The lower rear panel assembly 8 refers to the structural component forming the rear boundary of the lower handrail frame 1, aiming to ensure the stable establishment of the overlapping relationship of the two circular profiles. Specifically, the lower crossbeams are the transverse support members connecting the lower front panel assembly 7 and the lower rear panel assembly 8, which can be implemented using metal tubing or wooden strips, aiming to evenly distribute the upper load and improve the overall resistance to deformation. Furthermore, the lower support plate 10 is a support component located at the top of the lower handrail frame 1, which can be a flat structure fixed by mortise and tenon joints, aiming to provide a stable support foundation for the upper handrail frame 2.

[0039] Specifically, this design uses the lower front panel assembly 7 and the lower rear panel assembly 8 as boundary members of the frame. Both the lower front panel assembly 7 and the lower rear panel assembly 8 are constructed as circular components, jointly defining the lower cylindrical profile. In particular, their shape design precisely matches the upper front panel assembly 3 and the upper rear panel assembly 4, thereby ensuring the stable establishment of the overlapping relationship of the double circular profiles. Multiple lower crossbeams form a rigid connection between the front and rear components. Based on their distribution density and position, they can effectively disperse the load from the upper part and reduce local stress concentration. The lower support plate 10, located at the top of the frame, directly supports the bottom of the upper armrest frame 2. Its position design allows the upper armrest frame 2 to be stably erected, providing a reliable support foundation for the upward and outward bulge of the flexible core 20. Through the above structural design, not only are the assembly steps simplified, but the overall stability of the frame is also improved, ultimately ensuring the formation of a soft arc-shaped contact surface and significantly improving the user's comfort experience when leaning against it.

[0040] like Figure 5 and 6 as shown, the present application further provides a bottom load-bearing frame 11, which comprises: a日-shaped base plate 12; two end plates 13 arranged front and back, connected above the front and rear beams of the base plate 12 through a mortise and tenon structure, the end plate 13 comprises an integrally formed arc-shaped connecting part 14 and a side plate connecting part 15, the arc-shaped connecting part 14 is semicircular and its arc side faces the inner side of the sofa seat; a side plate 16, the lower end of which is connected to the side edge of the base plate 12 through a mortise and tenon structure, and the front end and the rear end of which are respectively connected to the side plate connecting parts 15 of the two front and rear end plates 13 through mortise and tenon structures.

[0041] In practical application, the日-shaped base plate 12 refers to a basic carrier with a symmetrical beam structure, which can be made of high-strength wood, and is intended to uniformly disperse the load of the upper frame and avoid distortion of the base plate 12 caused by stress concentration. Wherein, the integrally formed arc-shaped connecting part 14 and the side plate connecting part 15 of the end plate 13 can be an integral member, which is intended to simplify the production process and enhance the lateral impact resistance. Specifically, the design that the side plate 16 is connected with the base plate 12 and the end plate 13 through the mortise and tenon structure can be understood as a standardized interface solution, which can realize rapid assembly through preset tenons and mortises, and is intended to improve production efficiency and ensure structural strength. Specifically, the bottom load-bearing frame 11 uses the日-shaped base plate 12 as a basic carrier, and utilizes its symmetrical beam structure to maintain the overall geometric stability when supporting dynamic leaning forces. The end plates 13 are connected above the front and rear beams of the base plate 12 through the mortise and tenon structure, which not only realizes rapid and accurate positioning, but also saves the debugging time of additional fasteners. The semicircular contour of the arc-shaped connecting part 14 naturally fits the curved transition of the inner side of the sofa seat, eliminates modeling faults, and enhances the lateral impact resistance through the continuous force distribution of the arc edge. The lower end of the side plate 16 is connected to the side edge of the base plate 12, and the front end and the rear end of the side plate 16 are respectively connected to the side plate connecting parts 15 of the end plates 13, forming a closed-loop frame structure, which rigidly integrates the base plate 12, the end plates 13 and the side plate 16 into a whole, thereby effectively resisting external deformation. In addition, the design of the above-mentioned bottom load-bearing frame 11 is combined with the upper armrest frame 2 and the lower armrest frame 1, and the standardized interface connected by mortise and tenon allows the components to be pre-assembled on the assembly line, greatly shortening the on-site installation cycle, and at the same time ensuring that the framework maintains consistent structural strength in mass production.

[0042] In a further embodiment, the arc-shaped connecting part 14 has multiple mortise holes 141 on its arc-shaped edge and multiple strip slots 142 on its straight edge; the lower crossbeam includes a plug-in crossbeam 18 and a through crossbeam 19; the plug-in crossbeam 18 has tenons 181 at both ends, which are inserted into the mortise holes 141 of the arc-shaped connecting part 14; the through crossbeam 19 passes through the strip slots 142 on the straight edge of the arc-shaped connecting part 14; the lower handrail frame 1 is connected to the end plate 13 through the plug-in crossbeam 18 and the through crossbeam 19; the semi-circular outline of the arc-shaped connecting part 14 makes the lower handrail frame 1 form an open area 100 without frame support on the outside away from the vertical edge.

[0043] The arc-shaped connecting part 14 is a structural component with a specific geometric shape. Multiple tenon eyes 141 on the arc-shaped edge are positioned according to the curvature to precisely insert the tenons 181 of the connecting beam 18, ensuring accurate positioning of the connection point and providing stable mechanical locking. The strip-shaped through-holes 142 on the straight edge are guide structures designed based on linear features. They can be implemented in the form of oblong holes or rectangular slots, allowing the connecting beam 19 to be adjusted during assembly, simplifying the operation steps. Specifically, this technical solution effectively solves the contradiction between assembly efficiency and structural stability by optimizing the connection structure between the end plate 13 and the lower handrail frame 1. The arc-shaped connecting part 14 has multiple tenon eyes 141 on its arc-shaped edge, allowing the tenons 181 of the connecting beam 18 to be precisely inserted along the curved surface, avoiding connection misalignment caused by angular deviations. The straight edge has multiple strip-shaped through-holes 142, allowing the connecting beam 19 to be quickly aligned during assembly without additional tools. The lower crossbeams are divided into two types: insert crossbeams 18 and through crossbeams 19. Based on the different stress requirements of the connection points, insert crossbeams 18 are suitable for areas requiring high-strength torsional resistance, while through crossbeams 19 are used for areas requiring flexible passage. This classification design makes the connection method more consistent with actual mechanical distribution, enhancing overall adaptability. Through the above structural design, while achieving a stable connection, the open area 100 without external frame support is retained, providing sufficient margin for subsequent flexible filling, thus satisfying both aesthetic requirements and comfort.

[0044] Furthermore, it also includes an intermediate upright plate 17, which is mounted on the intermediate beam of the base plate 12 via a mortise and tenon structure, and has a strip-shaped through-slot 142 on its vertical edge. The middle part of the inserted crossbeam 18 is supported on the intermediate upright plate 17, and the crossbeam 19 passes through it while also passing through the strip-shaped through-slot 142 on the intermediate upright plate 17. The intermediate upright plate 17 is a plate-shaped component set in the middle of the frame to provide support and connection functions. It can be made of wood, metal, or composite materials, and the specific material can be uniformly selected according to the overall frame material. The intermediate upright plate 17 is connected to the intermediate beam of the base plate 12 via a mortise and tenon structure. This connection method can ensure assembly accuracy and improve structural stability, and can achieve rapid positioning without additional fasteners. The strip-shaped through-slot 142 on the vertical edge provides axial adjustment space for the crossbeam 19 to pass through, in order to accommodate manufacturing tolerances and ensure smooth assembly, avoiding connection loosening problems caused by dimensional deviations. Specifically, this solution solves the problem of the lack of effective support in the middle of the crossbeam by introducing the intermediate upright plate 17. The intermediate upright plate 17 is precisely positioned on the central beam of the base plate 12, directly acting on the weak stress areas of the interlocking crossbeam 18 and the through-beam 19, evenly distributing the load to the base plate 12, thereby significantly reducing the risk of crossbeam bending deformation. The middle part of the interlocking crossbeam 18 is supported by the intermediate upright plate 17. This design not only strengthens the crossbeam's resistance to deformation but also maintains the geometric consistency of the handrail contour. The through-beam 19, after passing through the strip groove 142, achieves continuous constraint in the length direction, preventing lateral displacement while simplifying the assembly process and improving production efficiency. In addition, the connection between the intermediate upright plate 17, the base plate 12, and the crossbeams together constitutes a stable overall frame, providing a reliable support foundation for the flexible core 20, thereby ensuring user comfort when leaning against it and long-term durability.

[0045] Furthermore, the lower support plate 10 is located at the top of the lower handrail frame 1, and the upper support plate 6 of the upper handrail frame 2 is stacked and fixed to the lower support plate 10. The two ends of the lower support plate 10 are connected to the lower front plate assembly 7 and the lower rear plate assembly 8 via mortise and tenon joints, and the middle section is mounted on the upper end of the intermediate upright plate 17. The lower support plate 10 is a key component used to support the flexible core 20 and maintain the overall stability of the handrail frame; it can be made of wood. The mortise and tenon joint is a traditional and stable connection method, achieving a tight fit between components through interlocking mortise and tenon joints. Its purpose is to avoid the loosening or stress concentration problems that may occur with traditional screw connections, while simplifying the assembly process. In addition, the intermediate upright plate 17, as part of the load-bearing structure, is designed at its upper end to support the lower support plate 10, thus forming a three-point support structure to evenly distribute the load. Specifically, this technical solution effectively solves the structural deformation problem caused by insufficient central support by optimizing the connection method of the lower support plate 10. The two ends of the lower support plate 10 are connected to the lower front plate assembly 7 and the lower rear plate assembly 8 via mortise and tenon joints. This connection method not only improves the strength of the connection but also reduces the risk of loosening due to long-term use. Simultaneously, the middle of the lower support plate 10 is mounted on the upper end of the intermediate upright plate 17, fully utilizing the load-bearing capacity of the intermediate upright plate 17 to form a stable three-point support structure. This allows the load to be evenly distributed to the front and rear plate assemblies and the intermediate upright plate 17, preventing the central area from sagging due to lack of support. This design not only ensures the contour stability of the double-circle shape but also provides a uniform support foundation for the upper flexible core 20, thereby guaranteeing the comfort and structural durability of the handrail during long-term use. Furthermore, this solution complements the design of the lower handrail frame 1 and the intermediate upright plate 17, jointly improving the overall rigidity and ease of production of the handrail skeleton.

[0046] Example 2:

[0047] like Figure 7 and 8As shown in the illustration, this application also discloses a double-circle sofa armrest, including the aforementioned double-circle sofa armrest frame, a flexible core 20 filling the outside of the frame to form the outer contour of the double cylinder, and a fabric 21 covering the outer surface. The flexible core 20 includes a semi-cylindrical core adapted to the upper armrest frame 2, which directly fastens and covers the frameless open area 100 of the upper armrest frame 2, forming a full arc-shaped contact surface. The core of this embodiment is that by combining the frameless open area 100 of the upper armrest frame 2 with the flexible core 20 in a specific way, the problem of the hardness and discomfort caused by the frame in the upper armrest of the double-circle sofa is effectively solved. Specifically, this design achieves a soft and comfortable leaning experience by reserving an open area 100 at the top and outside of the upper armrest frame 2 and utilizing the filling and raised characteristics of the flexible core 20, while retaining the aesthetic effect of the double-circle shape. In addition, this solution balances structural rationality and production convenience, providing a new solution for sofa armrest design.

[0048] In practical applications, the frameless open area 100 refers to the area on the top and outer sides of the upper armrest frame 2 where no rigid support structure is provided. This area can be formed by reducing or removing transverse or longitudinal supports in a traditional frame, for example, retaining only necessary connecting parts while removing the remaining support structure. The purpose is to provide ample space for the filling of the flexible core 20. The flexible core 20 can be filled with various materials, such as high-density sponge, memory foam, or latex, which are elastic and stretchable. Once filled into the open area 100, these materials naturally extend upwards and outwards, ultimately forming an ergonomically curved contact surface. The main function of this design is to prevent the rigid frame from directly contacting the arm, thereby improving the leaning experience. Through the above technical solution, not only is the rigidity of the upper armrest of a traditional double-circle sofa due to frame support solved, but the user's leaning comfort is also significantly improved. At the same time, this design achieves a complex shape while taking into account structural rationality and ease of production, providing a new solution for sofa armrest design.

[0049] In a further embodiment, the upper front panel assembly 3 is composed of two symmetrically arranged quarter-circle plates, forming an upper groove 31 with a forward opening between them; and / or, the lower front panel assembly 7 is provided with a lower groove 71 with a forward opening. A decorative strip 22 is embedded in the upper groove 31 and / or the lower groove 71; or, the lower groove 71 extends downward and a downwardly extending support rod 23 is fixedly connected therein.

[0050] Specifically, the upper front panel assembly 3 refers to a structure composed of two symmetrically arranged quarter-circular plates. It can be achieved by stamping metal sheets or cutting and splicing wood materials, aiming to simplify the manufacturing process and naturally form the forward-opening upper groove 31. The forward-opening lower groove 71 of the lower front panel assembly 7 can be understood as a hollow structure with a specific geometric shape, which can be formed through integral molding or post-processing, aiming to provide space for decorative elements while ensuring structural strength. Alternatively, the forward-opening lower groove 71 of the lower front panel assembly 7 can also be achieved through a groove formed between two semi-circular plates.

[0051] In detail, the upper groove 31 refers to a forward-opening groove structure on the upper front panel assembly 3, which can be formed by the gap between two symmetrically arranged quarter-circle plates to enhance the layering of the armrest design. The lower groove 71 refers to a forward-opening groove structure on the lower front panel assembly 7, which can be directly formed through processing technology to enhance the overall design. The decorative strip 22 can be a strip-shaped component with a decorative appearance, and its material can be metal, wood, or plastic, etc., to fill the visual emptiness caused by the groove opening and enhance the artistic expression of the product. In another embodiment, the support rod 23 refers to a rod-shaped structure that extends downward from the lower groove 71 and is fixedly connected, which can be made of metal tubing or wood, to transform the groove space into a functional support point, thereby strengthening the overall stability of the armrest.

[0052] Specifically, the above technical solutions optimize the use of the recessed space through two complementary methods. For the design of embedding decorative strips 22 in the upper recess 31 and / or lower recess 71, based on the open characteristics of the recesses, embedding the decorative strips 22 not only eliminates the visual emptiness but also avoids interference with the overall integrity of the frame due to additional processing, thus enhancing the product's refinement and aesthetics. In the second solution, the design of extending downwards through the lower recess 71 to fix the support rod 23 fully utilizes the extended space of the recess, transforming it into a structural support point, thereby enhancing the stability of the handrail. Furthermore, this design simplifies the integration process of the support rod 23 with the frame, allowing the design and functional requirements to blend naturally, avoiding the abruptness caused by exposed traditional support structures. Through these designs, not only are aesthetic issues that may arise from the open state of the recesses resolved, but the functionality and practicality of the handrail are also effectively improved, showcasing unique design ingenuity and technological advantages.

[0053] In summary, the double-circle sofa armrest frame and double-circle sofa armrest provided in this application, by designing the top and outer sides of the upper armrest frame 2 as open areas 100 without frame support, allows the flexible core 20 to be naturally filled and bulge upward and outward to form a soft arc-shaped contact surface, effectively avoiding the oppressive feeling caused by rigid frame support, and has the advantage of significantly improving user comfort.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A sofa armrest framework with a dual-circular shape, comprising a lower armrest frame (1) and an upper armrest frame (2) arranged thereon, characterized in that: said upper armrest frame (2) and said lower armrest frame (1) together define an overlapping dual-cylinder external contour; the overall height of said upper armrest frame (2) is less than the corresponding height of the upper cylinder contour, and the top and outer side of said upper armrest frame are open areas (100) without framework support, so as to allow a flexible core (20) to be filled in said area and bulge upward and outward to form a soft arc-shaped contact surface.

2. The double-circle sofa armrest frame according to claim 1, characterized in that, said upper armrest frame (2) comprises a front upper plate assembly (3), a rear upper plate assembly (4), a plurality of upper cross beams (5) connecting the front upper plate assembly and the rear upper plate assembly, and an upper supporting plate (6) arranged at the bottom of the frame; said front upper plate assembly (3) is a lower semicircular member, said rear upper plate assembly (4) is an inner semicircular member, and the arc side of said rear upper plate assembly faces the inner side of the sofa seat, so as to jointly define the open area (100) without framework support at the top and outer side of said upper armrest frame (2).

3. The double-circle sofa armrest frame according to claim 2, characterized in that, said lower armrest frame (1) comprises a front lower plate assembly (7), a rear lower plate assembly (8), a plurality of lower cross beams connecting the front lower plate assembly and the rear lower plate assembly, and a lower supporting plate (10) arranged at the top of the frame; both said front lower plate assembly (7) and said rear lower plate assembly (8) are configured as circular members.

4. The double-circle sofa armrest frame according to claim 3, characterized in that, The present invention further comprises a bottom load-bearing framework (11), which comprises: a substrate (12) in a shape of a Chinese character 'ri'; two end plates (13) arranged front and back, connected above front and rear beams of the substrate (12) through mortise and tenon structures, wherein said end plate (13) comprises an integrally formed arc-shaped connecting part (14) and a side plate connecting part (15), and said arc-shaped connecting part (14) is semicircular and the arc side thereof faces the inner side of the sofa seat; a side plate (16), the lower end of which is connected to a side edge of said substrate (12) through a mortise and tenon structure, and a front end portion and a rear end portion of which are respectively connected to the side plate connecting parts (15) of two front and rear end plates (13) through mortise and tenon structures.

5. The double-circle sofa armrest frame according to claim 4, characterized in that, a plurality of mortise holes (141) are arranged on the arc edge of said arc-shaped connecting part (14), and a plurality of strip-shaped through grooves (142) are arranged on the straight edge of said arc-shaped connecting part; said lower cross beams comprise an inserting cross beam (18) and a penetrating cross beam (19); two ends of said inserting cross beam (18) are provided with tenons (181), and said tenons (181) are inserted into the mortise holes (141) of said arc-shaped connecting part (14); said penetrating cross beam (19) penetrates the strip-shaped through grooves (142) on the straight edge of said arc-shaped connecting part (14); said lower armrest frame (1) is connected to said end plate (13) through said inserting cross beam (18) and said penetrating cross beam (19); the semicircular contour of said arc-shaped connecting part (14) enables the lower armrest frame (1) to form an open area (100) without framework support on the outer side away from the vertical edge.

6. The double-circle sofa armrest frame according to claim 5, characterized in that, The present invention further comprises an intermediate vertical plate (17), which is erected on an intermediate beam of said substrate (12) through a mortise and tenon structure, and a strip-shaped through groove (142) is formed on the vertical edge of said intermediate vertical plate; the middle part of said inserting cross beam (18) is supported on said intermediate vertical plate (17), and said penetrating cross beam (19) simultaneously penetrates the strip-shaped through groove (142) on said intermediate vertical plate (17).

7. The double-circle sofa armrest frame according to claim 6, characterized in that, The two ends of the lower support plate (10) are connected to the lower front plate assembly (7) and the lower rear plate assembly (8) through mortise and tenon structure, and the middle part is mounted on the upper end of the middle upright plate (17).

8. A double-circle sofa armrest, characterized in that, The sofa armrest frame, which includes any one of claims 1-7, further includes a flexible core (20) filled on the outside of the frame to form the outer contour of the double cylinder and a fabric (21) covering the outer surface. The flexible core (20) includes a semi-cylindrical core that is adapted to the upper armrest frame (2). The semi-cylindrical core directly snaps onto and covers the open area (100) of the upper armrest frame (2) without frame support, forming a full arc-shaped contact surface.

9. The double-circle sofa armrest according to claim 8, characterized in that, The upper front panel assembly (3) is composed of two symmetrically arranged quarter-circle plates, with an upper groove (31) that opens forward between them; and / or, the lower front panel assembly (7) is provided with a lower groove (71) that opens forward.

10. The double-circle sofa armrest according to claim 9, characterized in that, A decorative strip (22) is embedded in the upper groove (31) and / or the lower groove (71); or, the lower groove (71) extends downward and a downwardly extending support rod (23) is fixedly connected therein.

Images