Modularized combined sofa

Abstract

The utility model discloses a modularized combined sofa. The modularized combined sofa comprises a cushion assembly and a base assembly, the cushion assembly comprises at least one cushion unit, and a first connecting piece is arranged at the bottom of each cushion unit in the cushion assembly; the base assembly comprises at least one base unit, and a second connecting piece is arranged at the top of each base unit in the base assembly; wherein the total number of the first connecting pieces contained in the cushion assembly is the same as the total number of the second connecting pieces contained in the base assembly, and each first connecting piece in the cushion assembly is movably connected to the corresponding second connecting piece in the base assembly; therefore, each seat cushion unit in the seat cushion assembly can rotate relative to the corresponding base unit in the base assembly. The seat cushion unit and the base unit are movably connected through the first connecting piece and the second connecting piece, the seat cushion unit and the base unit can achieve the rotating function, assembling and disassembling are easy, and the requirement for flexible layout of space scenes can be met.

Description

Technical Field

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

[0002] Sofas provide a place for rest and relaxation and are one of the main pieces of furniture in homes and public spaces. With the development of the times and the improvement of people's living standards, sofas not only need to focus on practicality but also on personalization and style, thus more closely integrating space, function, and the user's individual needs. However, traditional sofas are usually fixed in structure, bulky, and cannot be disassembled, making them difficult and laborious to move, and increasing costs associated with shipping, warehousing, and last-mile delivery. Furthermore, they cannot quickly adjust the spatial layout to suit different usage scenarios, making them inconvenient to adapt to various spatial arrangements. Utility Model Content

[0003] This utility model provides a modular sofa, which aims to solve the problems of fixed sofa structure, difficulty in disassembly, and inconvenience in adjusting the layout of existing sofas.

[0004] This utility model proposes a modular sofa, comprising: a seat cushion assembly and a base assembly; the seat cushion assembly includes at least one seat cushion unit, and each seat cushion unit in the seat cushion assembly is provided with a first connector at its bottom; the base assembly includes at least one base unit, and each base unit in the base assembly is provided with a second connector at its top; wherein, the total number of first connectors in the seat cushion assembly is the same as the total number of second connectors in the base assembly, and each first connector in the seat cushion assembly is movably connected to a corresponding second connector in the base assembly, so that each seat cushion unit in the seat cushion assembly and the corresponding base unit in the base assembly can rotate relative to each other.

[0005] In one technical solution, the second connector is provided with an opening groove, and the first connector can be at least partially inserted into the opening groove and can rotate around the opening groove.

[0006] In one technical solution, the first connector includes a first connecting plate and a connecting rod; the first connecting plate is disposed on the upper end of the outer wall of the connecting rod, and the first connecting plate is detachably connected to the bottom of the cushion unit; the connecting rod can be inserted into the opening groove and can rotate around the opening groove.

[0007] In one technical solution, the connecting rod includes a shaft portion and a limiting portion; the first connecting plate is disposed on the upper end of the shaft portion, the limiting portion is disposed on the outer wall of the shaft portion, and the limiting portion is located below the first connecting plate; when the shaft portion is inserted into the opening groove, the limiting portion abuts against the top of the second connecting member.

[0008] In one technical solution, the second connector includes a second connecting plate and a sleeve, the opening groove is disposed on the sleeve, the second connecting plate is disposed on the upper end of the outer wall of the sleeve, and the second connecting plate is detachably connected to the top of the base unit.

[0009] In one technical solution, at least one seat cushion unit in the seat cushion assembly is provided with a first backrest assembly.

[0010] In one technical solution, the first backrest assembly includes a first back cushion and a first support member. The first back cushion is disposed on the first support member, and the first support member is detachably connected to the corresponding seat cushion unit so that the first back cushion is located at the rear end of the corresponding seat cushion unit.

[0011] In one technical solution, a fixing member is provided at the bottom of the first support member, and the fixing member is detachably connected to the corresponding base unit in the base assembly.

[0012] In one technical solution, the modular sofa further includes at least one second backrest assembly, each of the at least one second backrest assembly being detachably connected to a corresponding base unit in the base assembly, such that each second backrest assembly is located at the rear end of a corresponding cushion unit in the cushion assembly.

[0013] In one technical solution, the second backrest assembly includes a second back cushion and a second support member. The second back cushion is disposed on the second support member, and the second support member is detachably connected to the corresponding base unit in the base assembly, so that the second back cushion is located at the rear end of the corresponding seat unit in the seat cushion assembly.

[0014] In one technical solution, each base unit in the base assembly is provided with a first fixing hole at its bottom, and the first fixing hole is used to install a self-locking caster wheel.

[0015] In one technical solution, each base unit in the base assembly is provided with a second fixing hole at its bottom, the second fixing hole being used to install and fix the sofa legs.

[0016] Compared with existing technologies, the modular sofa provided by this utility model includes a seat cushion assembly and a base assembly. The seat cushion assembly includes at least one seat cushion unit, and each seat cushion unit in the seat cushion assembly has a first connector at its bottom. The base assembly includes at least one base unit, and each base unit in the base assembly has a second connector at its top. The total number of first connectors in the seat cushion assembly is the same as the total number of second connectors in the base assembly. Each first connector in the seat cushion assembly is movably connected to a corresponding second connector in the base assembly, allowing each seat cushion unit in the seat cushion assembly and its corresponding base unit in the base assembly to rotate relative to each other. This utility model movably connects the seat cushion unit and the base unit through the first and second connectors, enabling the seat cushion unit and the base unit to rotate, facilitating assembly and disassembly, and allowing for flexible layout in various spatial scenarios. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a modular sofa provided in an embodiment of the present invention;

[0019] Figure 2 This is a structural schematic diagram of a modular sofa provided in another embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the first connector and the second connector provided in an embodiment of the present utility model;

[0021] Figure 4 A front view of a first connector and a second connector provided in an embodiment of the present utility model;

[0022] Figure 5 Three views of a modular sofa provided in an embodiment of this utility model;

[0023] Figure 6 This is a partial structural schematic diagram of a modular sofa provided in an embodiment of the present invention;

[0024] The labels for the attached figures are as follows:

[0025] 1. Seat cushion assembly; 11. Seat cushion unit; 2. Base assembly; 21. Base unit; 3. First connector; 31. First connecting plate; 32. Connecting rod; 321. Shaft part; 322. Limiting part; 4. Second connector; 41. Opening groove; 42. Second connecting plate; 43. Sleeve; 5. First backrest assembly; 51. First back cushion; 52. First support member; 53. Fixing member. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for explanation and understanding of this invention, and not for limiting it. Furthermore, in the accompanying drawings, structures that are similar or identical are indicated by the same reference numerals.

[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] Please see Figures 1 to 6 , Figure 1 This is a schematic diagram of the structure of a modular sofa provided in an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a modular sofa provided in another embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the first connector and the second connector provided in an embodiment of the present utility model; Figure 4 A front view of a first connector and a second connector provided in an embodiment of the present utility model; Figure 5 Three views of a modular sofa provided in an embodiment of this utility model; Figure 6 This is a partial structural schematic diagram of a modular sofa provided in one embodiment of the present invention.

[0033] This utility model provides a modular sofa, including: a seat cushion assembly 1 and a base assembly 2; the seat cushion assembly 1 includes at least one seat cushion unit 11, and each seat cushion unit 11 in the seat cushion assembly 1 is provided with a first connector 3 at its bottom; the base assembly 2 includes at least one base unit 21, and each base unit 21 in the base assembly 2 is provided with a second connector 4 at its top; wherein, the total number of first connectors 3 in the seat cushion assembly 1 is the same as the total number of second connectors 4 in the base assembly 2, and each first connector 3 in the seat cushion assembly 1 is movably connected to a corresponding second connector 4 in the base assembly 2, so that each seat cushion unit 11 in the seat cushion assembly 1 and the corresponding base unit 21 in the base assembly 2 can rotate relative to each other.

[0034] In this embodiment, see Figures 1 to 6 The modular sofa includes a seat cushion assembly 1 and a base assembly 2. The seat cushion assembly 1 includes at least one seat cushion unit 11, and the base assembly 2 includes at least one base unit 21. Each seat cushion unit 11 has a first connector 3 at its bottom and each base unit 21 has a second connector 4 at its top. The first connector 3 is movably connected to the second connector 4. When the first connector 3 at the bottom of the seat cushion unit 11 is movably connected to the second connector 4 in the corresponding base unit 21, the seat cushion unit 11 is movably mounted on the corresponding base unit 21, allowing the seat cushion unit 11 and the base unit 21 to rotate relative to each other. The first connector 3 and the second connector 4 facilitate easy assembly and disassembly of the seat cushion unit 11 and the base unit 21. The number of first connectors 3 at the bottom of each seat cushion unit 11 and the number of second connectors 4 at the top of each base unit 21 can be limited according to actual needs and are not specifically limited here.

[0035] The total number of first connectors 3 in the cushion assembly 1 (i.e., the total number of first connectors 3 provided at the bottom of all cushion units 11 in the cushion assembly 1) is equal to the total number of second connectors 4 in the base assembly 2. Each first connector 3 in the cushion assembly 1 is movably connected to the corresponding second connector 4 in the base assembly 2, thereby movably setting each cushion unit 11 on the corresponding base unit 21, and each cushion unit 11 and the corresponding base unit 21 can rotate relative to each other. Specifically, when the cushion assembly 1 includes one cushion unit 11 and the base assembly 2 includes one base unit 21, the first connector 3 at the bottom of the cushion unit 11 is movably connected to the corresponding second connector 4 on the base unit 21, so that the cushion unit 11 is movably set on the base unit 21, thereby assembling a single-size sofa, and the cushion unit 11 can rotate 360 ​​degrees relative to the base unit 21. When the cushion assembly 1 includes at least two cushion units 11 and the base assembly 2 includes at least two base units 21, the cushion units 11 in the cushion assembly 1 and the base units 21 in the base assembly 2 can be arranged arbitrarily. Each cushion unit 11 is movably connected to its corresponding base unit 21 via a first connector 3, allowing the cushion units 11 in the cushion assembly 1 to be arbitrarily arranged on their corresponding base units 21, thus forming sofas of various sizes. Furthermore, if any adjacent base unit 21 in the base assembly 2 is connected to the corresponding cushion unit 11 in the cushion assembly 1, then all cushion units 11 in the cushion assembly 1 and all base units 21 in the base assembly 2 are interconnected. In this case, the cushion units 11 can rotate at multiple angles relative to their corresponding base units 21 to form different sofa shapes, for example, such as... Figure 1 The sofa design shown is a straight line, such as Figure 2 The irregular sofa shape shown makes the modular sofa design diverse and not limited to a specific sofa shape. It can be adapted to different spatial scenarios and allows users to quickly adjust the sofa space layout in different usage scenarios, thus meeting the needs of flexible spatial layout.

[0036] The modular sofa provided in this embodiment connects the seat cushion unit 11 and the base unit 21 via the first connector 3 and the second connector 4, making it easy to assemble and disassemble without effort, thus reducing costs associated with sea freight, warehousing, and last-mile delivery. Furthermore, the seat cushion unit 11 and the base unit 21 are rotatable, allowing them to be used without being limited by a specific sofa design, and the number of seat cushion units 11 and base units 21 can be set according to requirements, providing greater possibilities for personalized customization.

[0037] In a more specific embodiment, the second connector 4 is provided with an opening groove 41, and the first connector 3 can be at least partially inserted into the opening groove 41 and can rotate around the opening groove 41.

[0038] In this embodiment, see Figure 3 and Figure 4 The second connector 4 has an opening slot 41, into which the first connector 3 can be at least partially inserted and rotated. This allows the first connector 3 to be quickly connected to or disconnected from the second connector 4. Furthermore, the relative rotation of the first connector 3 and the second connector 4 causes the corresponding seat cushion unit 11 and base unit 21 to rotate relative to each other, enabling the rotation of the seat cushion unit 11 and base unit 21 to be completed with a single hand. The seat cushion unit 11 can be installed with the corresponding base unit 21 simply by inserting the first connector 3 into the opening slot 41 on the second connector 4. Installation is simple, quick, and easy, with minimal effort required for disassembly.

[0039] In a more specific embodiment, the first connector 3 includes a first connecting plate 31 and a connecting rod 32; the first connecting plate 31 is disposed on the upper end of the outer wall of the connecting rod 32, and the first connecting plate 31 is detachably connected to the bottom of the cushion unit 11; the connecting rod 32 can be inserted into the opening slot 41 and can rotate around the opening slot 41.

[0040] In this embodiment, see Figure 3 and Figure 4 The first connecting member 3 consists of a first connecting plate 31 and a connecting rod 32. The first connecting plate 31 is disposed on the upper end of the outer wall of the connecting rod 32. The first connecting plate 31 is used for detachable connection with the bottom of the cushion unit 11. Preferably, the first connecting plate 31 is provided with several through holes for detachable connection with the bottom of the cushion unit 11. Fasteners (such as screws) pass through the through holes on the first connecting plate 31 to connect with the bottom of the cushion unit 11, making the connection convenient and firm, and facilitating the assembly and disassembly of the first connecting plate 31 and the cushion unit 11. The connecting rod 32 is adapted to the opening slot 41. The connecting rod 32 can be inserted into the opening slot 41 and can rotate around the opening slot 41 to drive the cushion unit 11 and the base unit 21 to rotate relative to each other. Preferably, the first connecting plate 31 and the connecting rod 32 are integrally formed to improve the structural strength of the first connecting member 3.

[0041] In a more specific embodiment, the connecting rod 32 includes a shaft portion 321 and a limiting portion 322; the first connecting plate 31 is disposed on the upper end of the shaft portion 321, the limiting portion 322 is disposed on the outer wall of the shaft portion 321, and the limiting portion 322 is located below the first connecting plate 31; when the shaft portion 321 is inserted into the opening slot 41, the limiting portion 322 abuts against the top of the second connecting member 4.

[0042] In this embodiment, see Figure 3 and Figure 4 The connecting rod 32 includes a shaft portion 321 and a limiting portion 322, which are integrally formed. A first connecting plate 31 is disposed on the upper end of the shaft portion 321, and the limiting portion 322 is disposed on the outer wall of the shaft portion 321 below the first connecting plate 31. The shaft portion 321 is adapted to the opening groove 41 and can be inserted into the opening groove 41. The shaft portion 321 can rotate around the opening groove 41. When the shaft portion 321 is inserted into the second connecting member 4, the limiting portion 322 abuts against the top of the second connecting member 4, thereby separating the first connecting plate 31 from the second connecting member 4. This allows the shaft portion 321 to drive the first connecting plate 31 to rotate above the second connecting member 4, thereby driving the seat cushion unit 11 to rotate.

[0043] In a more specific embodiment, the second connector 4 includes a second connecting plate 42 and a sleeve 43. The opening groove 41 is disposed on the sleeve 43, and the second connecting plate 42 is disposed on the upper end of the outer wall of the sleeve 43. The second connecting plate 42 is detachably connected to the top of the base unit 21.

[0044] In this embodiment, see Figure 3 and Figure 4 The second connecting member 4 consists of a second connecting plate 42 and a sleeve 43. The sleeve 43 has an opening slot 41. The second connecting plate 42 is located on the upper end of the outer wall of the sleeve 43 and is used for detachable connection to the top of the base unit 21. Preferably, the second connecting plate 42 has several through holes for detachable connection to the bottom of the base unit 21. Fasteners (e.g., screws) pass through these through holes to connect to the bottom of the base unit 21, making the connection convenient and secure, and facilitating the assembly and disassembly of the second connecting plate 42 and the base unit 21. Preferably, the second connecting plate 42 and the sleeve 43 are integrally formed to improve the structural strength of the second connecting member 4.

[0045] In a more specific embodiment, at least one cushion unit 11 in the cushion assembly 1 is provided with a first backrest assembly 5.

[0046] In this embodiment, see Figure 1 , Figure 2 , Figure 5 and Figure 6 At least one seat cushion unit 11 in the seat cushion assembly 1 is provided with a first backrest assembly 5 to provide comfortable back support.

[0047] In a more specific embodiment, the first backrest assembly 5 includes a first back cushion 51 and a first support member 52. The first back cushion 51 is disposed on the first support member 52, and the first support member 52 is detachably connected to the corresponding seat cushion unit 11 so that the first back cushion 51 is located at the rear end of the corresponding seat cushion unit 11.

[0048] In this embodiment, see Figure 6 The first backrest assembly 5 includes a first back cushion 51 and a first support member 52. The first back cushion 51 is disposed on the first support member 52. The number of first support members 52 is not specifically limited and can be set according to actual needs. The first support member 52 can be detachably connected to the seat cushion unit 11. The first back cushion 51 is located at the rear end of the corresponding seat cushion unit 11 through the connection between the first support member 52 and the seat cushion unit 11. Preferably, the first support member 52 is provided with a through hole for detachable connection with the seat cushion unit 11. The seat cushion unit 11 is connected by fasteners (such as screws) passing through the through hole in the first support member 52. The connection is convenient and firm, facilitating the assembly and disassembly of the first support member 52 and the seat cushion unit 11.

[0049] In a more specific embodiment, the bottom of the first support member 52 is provided with a fixing member 53, and the fixing member 53 is detachably connected to the corresponding base unit 21 in the base assembly 2.

[0050] In this embodiment, see Figure 6 The bottom of the first support member 52 is provided with a fixing member 53 for detachable connection with the base unit 21. This allows the first support member 52 to be connected to the corresponding base unit 21 via the fixing member 53, in addition to the seat cushion unit 11, making the installation of the first backrest assembly 5 more stable. Preferably, the first support member 52 and the fixing member 53 are integrally formed to improve structural strength and facilitate installation and use.

[0051] In a more specific embodiment, the modular sofa provided by this utility model further includes at least one second backrest assembly (not shown), each of the at least one second backrest assembly being detachably connected to the corresponding base unit 21 in the base assembly 2, such that each second backrest assembly is located at the rear end of the corresponding seat cushion unit 11 in the seat cushion assembly 1.

[0052] In this embodiment, the modular sofa also includes at least one second backrest assembly. Each second backrest assembly is mounted on a corresponding base unit 21 and located at the rear end of the corresponding seat cushion unit 11 in the seat cushion assembly 1 to provide comfortable back support. In one embodiment, the structure of the second backrest assembly is similar to... Figure 6 The first backrest assembly 5 shown has the same structure.

[0053] In a more specific embodiment, the second backrest assembly includes a second back cushion (not shown) and a second support member (not shown). The second back cushion is disposed on the second support member, and the second support member is detachably connected to the corresponding base unit 21 in the base assembly 2, so that the second back cushion is located at the rear end of the corresponding seat unit 11 in the seat cushion assembly 1.

[0054] In this embodiment, the second backrest assembly includes a second back cushion and a second support member. The second back cushion is disposed on the second support member. The number of second support members is not specifically limited and can be set according to actual needs. The bottom of the second support member can be detachably connected to the corresponding base unit 21 in the base assembly 2. By connecting the second support member to the corresponding base unit 21, the second back cushion is located at the rear end of the corresponding seat cushion unit 11. Preferably, the second support member is provided with a through hole for detachable connection with the base unit 21. Fasteners (e.g., screws) pass through the through hole on the second support member to connect with the base unit 21, making the connection convenient and firm, and facilitating the assembly and disassembly of the second support member and the base unit 21. In one embodiment, the structures of the second back cushion and the second support member are respectively... Figure 6 The first back pad 51 and the first support member 52 shown have the same structure.

[0055] In a more specific embodiment, each base unit 21 in the base assembly 2 is provided with a first fixing hole (not shown) at its bottom, the first fixing hole being used to install a self-locking caster wheel (not shown).

[0056] In this embodiment, each base unit 21 in the base assembly 2 has a first fixing hole at its bottom for mounting self-locking casters. The number of these first fixing holes is not specifically limited and can be set according to actual needs. Mounting the self-locking casters at the bottom of the base unit 21 through the first fixing holes facilitates moving the sofa. The sofa's rotation and movement functions can be completed with just one hand, making it easier to quickly adjust the sofa's spatial layout. Preferably, the self-locking casters used are gravity-locked when the sofa's weight is greater than or equal to 46 catties.

[0057] In a more specific embodiment, each base unit 21 in the base assembly 2 is provided with a second fixing hole (not shown) at its bottom, the second fixing hole being used to install and fix sofa legs (not shown).

[0058] In this embodiment, each base unit 21 in the base assembly 2 is provided with a second fixing hole at its bottom for mounting and fixing the sofa legs. The number of the second fixing holes is not specifically limited and can be set according to actual needs. When each base unit 21 in the base assembly 2 is provided with both the first fixing hole and the second fixing hole at its bottom, the modular sofa can have two types of sofa legs available, satisfying the requirement for stability.

[0059] The modular sofa provided by this utility model includes a seat cushion assembly 1 and a base assembly 2. The seat cushion assembly 1 includes at least one seat cushion unit 11, and each seat cushion unit 11 in the seat cushion assembly 1 is provided with a first connector 3 at its bottom. The base assembly 2 includes at least one base unit 21, and each base unit 21 in the base assembly 2 is provided with a second connector 4 at its top. The total number of first connectors 3 in the seat cushion assembly 1 is the same as the total number of second connectors 4 in the base assembly 2. Each first connector 3 in the seat cushion assembly 1 is movably connected to a corresponding second connector 4 in the base assembly 2, so that each seat cushion unit 11 in the seat cushion assembly 1 and its corresponding base unit 21 in the base assembly 2 can rotate relative to each other. This utility model movably connects the seat cushion unit 11 and the base unit 21 through the first connectors 3 and the second connectors 4, enabling the seat cushion unit 11 and the base unit 21 to rotate, facilitating assembly and disassembly, and allowing for flexible layout in various spatial scenarios.

[0060] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A modular sofa, characterized in that, include: A seat cushion assembly and a base assembly; the seat cushion assembly includes at least one seat cushion unit, and each seat cushion unit in the seat cushion assembly has a first connector at its bottom; The base assembly includes at least one base unit, and each base unit in the base assembly is provided with a second connector on its top. The total number of first connectors in the cushion assembly is the same as the total number of second connectors in the base assembly. Each first connector in the cushion assembly is movably connected to a corresponding second connector in the base assembly, so that each cushion unit in the cushion assembly and its corresponding base unit in the base assembly can rotate relative to each other.

2. The modular sofa according to claim 1, characterized in that, The second connector has an opening groove, and the first connector can be at least partially inserted into the opening groove and can rotate around the opening groove.

3. The modular sofa according to claim 2, characterized in that, The first connector includes a first connecting plate and a connecting rod; the first connecting plate is disposed on the upper end of the outer wall of the connecting rod, and the first connecting plate is detachably connected to the bottom of the cushion unit; the connecting rod can be inserted into the opening groove and can rotate around the opening groove.

4. The modular sofa according to claim 3, characterized in that, The connecting rod includes a shaft portion and a limiting portion; the first connecting plate is disposed on the upper end of the shaft portion, the limiting portion is disposed on the outer wall of the shaft portion, and the limiting portion is located below the first connecting plate; when the shaft portion is inserted into the opening groove, the limiting portion abuts against the top of the second connecting member.

5. The modular sofa according to any one of claims 2 to 4, characterized in that, The second connector includes a second connecting plate and a sleeve. The opening slot is provided on the sleeve, and the second connecting plate is provided on the upper end of the outer wall of the sleeve. The second connecting plate is detachably connected to the top of the base unit.

6. The modular sofa according to claim 1, characterized in that, At least one seat cushion unit in the seat cushion assembly is provided with a first backrest assembly.

7. The modular sofa according to claim 6, characterized in that, The first backrest assembly includes a first back cushion and a first support member. The first back cushion is disposed on the first support member, and the first support member is detachably connected to the corresponding seat cushion unit so that the first back cushion is located at the rear end of the corresponding seat cushion unit.

8. The modular sofa according to claim 7, characterized in that, The first support member has a fixing member at its bottom, and the fixing member is detachably connected to the corresponding base unit in the base assembly.

9. The modular sofa according to claim 1, characterized in that, It also includes at least one second backrest assembly, each of the at least one second backrest assembly being detachably connected to a corresponding base unit in the base assembly, such that each second backrest assembly is located at the rear end of a corresponding cushion unit in the cushion assembly.

10. The modular sofa according to claim 9, characterized in that, The second backrest assembly includes a second back cushion and a second support member. The second back cushion is disposed on the second support member, and the second support member is detachably connected to the corresponding base unit in the base assembly, so that the second back cushion is located at the rear end of the corresponding seat unit in the seat cushion assembly.

11. The modular sofa according to claim 1, characterized in that, Each base unit in the base assembly has a first fixing hole at its bottom, which is used to install a self-locking caster wheel.

12. The modular sofa according to claim 1 or 11, characterized in that, Each base unit in the base assembly has a second fixing hole at its bottom, which is used to install and fix the sofa legs.

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