Detachable sofa and bolt locking fastener

Abstract

The utility model discloses a detachable sofa and a bolt locking fastener, the detachable sofa comprises a bottom frame, a seat soft body module, an armrest soft body module, a backpack soft body module, sofa legs, the bolt locking fastener and a sitting feeling assembly, the seat soft body module, the armrest soft body module and the sofa legs are detachably connected with the bottom frame through the plug pin lock catch pieces respectively, the backpack soft body module is detachably connected with the seat soft body module through the plug pin lock catch pieces, and the sitting feeling assembly is arranged in the seat soft body module. By the adoption of a full disassembly and assembly structure and modular size design, the full-assembly and full-disassembly type electric bicycle has the advantages of being small in transportation size, low in maintenance cost, convenient and rapid to assemble and disassemble, durable, good in sitting feeling experience, low in after-sale cost, low in stocking cost, small in storage space pressure and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture field, concretely relates to a detachable sofa and bolt lock fastener. BACKGROUND

[0002] The sofa is important component part of sitting room furniture, has irreplaceable position. However, because its volume is bigger, is vulnerable to damage in the transportation process, needs professional personnel to carry out after -sales maintenance, leads to after -sales cost to be higher. For export industry of foreign trade enterprise, the volume utilization rate is lower when sofa transportation, transportation cost is expensive. For the agency of warehousing type sales, different size and color of the same sofa are respectively warehoused, and the cost is high, and the storage space is occupied. Optimizing the packing volume of the sofa, reducing the product after -sales maintenance cost, become the long -term problem faced by sofa production enterprise. For consumers, after a period of time because of the change of use scene, there is the demand of replacing fabric, changing size, renovating, and only new sofa can be purchased, and there is no other low -cost solution.

[0003] The existing technical solution is to split the sofa into two parts of hardware feet and soft body, so as to reduce the packing volume, and the consumer connects through screws, hardware hook accessories after receiving the goods. However, this installation process needs to use screwdriver, hex spoon and other professional tools, and the installation time is long, and the transportation volume of the sofa is not obviously optimized and the use experience of the consumer is improved. In the aspect of after -sales, if the sofa is damaged, only the manufacturer can maintain or repair in the factory, which not only has high transportation cost and long time, but also makes the consumer lack the sofa in the living room. The embarrassment stage cannot obtain the alternative scheme. For the consumer who needs to renovate the sofa, replace the fabric or change the size, needs to wait for a long customizing period or replace the whole sofa, which greatly increases the cost of the consumer. The service life of the sofa made of traditional board wood material is short, is easy to damage and the size cannot be expanded on the basis of the original scene demand after use. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a detachable sofa and bolt lock fastener to solve one or more of the above problems.

[0005] In order to realize the above -mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model discloses a bolt lock fastener in the first aspect, including lock fastener A and lock fastener B;

[0007] The lock catch A comprises a lock catch body A and a spring clip, one end of the lock catch body A is provided with an insertion hole extending to the other end, the periphery of the lock catch body A is provided with a mounting groove, and a part of the mounting groove is communicated with the insertion hole, the spring clip is elastically clamped in the mounting groove, and a part of the spring clip protrudes into the insertion hole at the communication part of the mounting groove and the insertion hole;

[0008] The lock catch B comprises a column body, and the periphery of the column body is provided with a clamping groove matched with the part of the spring clip protruding into the insertion hole.

[0009] Further, the lock catch A further comprises a lock catch end panel integrally arranged at the end of the lock catch body A, the periphery of the lock catch body A is provided with an external thread, the external thread is located between the lock catch end panel and the mounting groove, and one end of the insertion hole close to the lock catch end panel is provided with a polygonal spoon hole.

[0010] Further, the lock catch B further comprises a lock catch mounting plate integrally fixed to the fixed end of the column body, and the lock catch mounting plate is provided with a bolt hole.

[0011] Further, the insertion end of the column body is provided with a guide surface, the diameter of the guide surface gradually increases in the direction away from the insertion end, the groove bottom of the clamping groove is provided with a clamping withdrawal inclined surface, and the clamping withdrawal inclined surface gradually increases in the direction close to the insertion end.

[0012] The second aspect of the utility model provides a detachable sofa, including the chassis, seat soft module, armrest soft module, back soft module, sofa foot and the plug pin lock catch part that the first aspect of the utility model provides, the seat soft module, armrest soft module, sofa foot are respectively through the plug pin lock catch part with detachable connection of the chassis, the back soft module is through the plug pin lock catch part with detachable connection of the seat soft module.

[0013] Further, the detachable sofa further comprises a sitting feeling assembly, the sitting feeling assembly comprises an arc-shaped bottom support, a fixed part, a serpentine spring, and a conical spring, two ends of the arc-shaped bottom support are respectively fixed with one of the fixed parts, two ends of the serpentine spring are respectively fixed to the two fixed parts, a small end of the conical spring is fixed to the arc-shaped bottom support, and an upper end of the conical spring is fixed to a middle part of the serpentine spring, wherein the serpentine spring is provided with two, the two serpentine springs are arranged in parallel and are spaced apart, and the conical spring and the two serpentine springs are fixed through a roll type connecting piece; the seat soft module comprises a seat frame, and the fixed part and front and rear cross beams of the seat frame are detachably connected.

[0014] Further, the seat soft module comprises a seat frame, a lock piece A is arranged at the bottom of the front and rear ends of the seat frame, a lock piece B is arranged at the position corresponding to the lock piece A of the seat frame of the bottom frame; the armrest soft module comprises an armrest frame, a lock piece A is arranged at the bottom of the armrest frame, a lock piece B is arranged at the position corresponding to the lock piece A of the seat frame of the bottom frame; a lock piece B is arranged at the top of the sofa leg, a lock piece A is arranged at the position corresponding to the lock piece B of the sofa leg of the bottom frame; a lock piece A is arranged at the top of the rear end of the seat frame, the back soft module comprises a back frame, a lock piece B is arranged at the position corresponding to the lock piece A of the seat frame of the back frame.

[0015] Further, the bottom frame, the seat frame, the armrest frame and the back frame are all steel inner frames, the outer sides of the steel inner frames are covered with sofa fabric, and the sofa fabric and the steel inner frames and the space of the steel inner frames are filled with soft filling.

[0016] Further, the bottom frame is divided into a unit sofa bottom frame and a multi-position sofa bottom frame.

[0017] The utility model has the advantages of the following:

[0018] The full disassembly structure and the modular size design are adopted, the transportation volume is small, the "repair by replacement" mode of "replace the broken one" is adopted, the maintenance efficiency is improved, and the maintenance cost is reduced; the bolt lock piece is adopted instead of the traditional screw or hardware hook, the user does not need any tool in the installation process, and also does not need professional training, and installation can be quickly completed; the all-steel structure frame is adopted instead of the traditional wooden structure frame, so that the sofa has the characteristics of high production precision and long service life; the self-developed steel seat feeling system accessory (seat feeling assembly) is adopted, and the cooperation of the double springs can provide better seat feeling experience; the modular full disassembly design provides flexible size module combination and replaceable fabric function, so that the after-sales cost, the inventory cost and the space pressure are reduced.

[0019] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating any creative labor.

[0021] The structures, proportions, sizes, etc. shown in the specification are merely used to cooperate with the disclosed content, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the utility model, and therefore do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope covered by the disclosed technical content.

[0022] Figure 1 A side view structural schematic diagram of a detachable sofa is provided for an embodiment of the utility model;

[0023] Figure 2 A structural schematic diagram of a unit chassis of a detachable sofa is provided for an embodiment of the utility model;

[0024] Figure 3 A structural schematic diagram of a double-position chassis of a detachable sofa is provided for an embodiment of the utility model;

[0025] Figure 4 A structural schematic diagram of a three-position chassis of a detachable sofa is provided for an embodiment of the utility model;

[0026] Figure 5 A structural schematic diagram of a seat soft module of a detachable sofa is provided for an embodiment of the utility model;

[0027] Figure 6 A position schematic diagram of a lock piece A of a seat frame of a seat soft module of a detachable sofa is provided for an embodiment of the utility model;

[0028] Figure 7 A position schematic diagram of a lock piece A of a seat frame of a seat soft module of a detachable sofa is provided for an embodiment of the utility model;

[0029] Figure 8 A position schematic diagram of a seat feeling assembly of a seat frame of a seat soft module of a detachable sofa is provided for an embodiment of the utility model;

[0030] Figure 9 A structural schematic diagram of an armrest soft module of a detachable sofa is provided for an embodiment of the utility model;

[0031] Figure 10 A position schematic diagram of a lock piece A of an armrest frame of an armrest soft module of a detachable sofa is provided for an embodiment of the utility model;

[0032] Figure 11 A structural schematic diagram of a back soft module of a detachable sofa is provided for an embodiment of the utility model;

[0033] Figure 12 Positional schematic view of the lock catch B of the backpack frame of the backpack soft module of the detachable sofa provided by the embodiment of the present utility model;

[0034] Figure 13 Structural schematic view of the sofa leg of the detachable sofa provided by the embodiment of the present utility model;

[0035] Figure 14 Structural schematic view of the lock catch A of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model;

[0036] Figure 15 Structural schematic view of the lock catch B of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model; Figure 14 Cross-sectional view of A-A in the figure;

[0037] Figure 16 Structural schematic view of the lock catch B of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model; Figure 14 Cross-sectional view of B-B in the figure;

[0038] Figure 17 Structural schematic view of the lock catch B of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model; Figure 16 Structural schematic view of the lock catch B of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model;

[0039] Figure 18 Structural schematic view of the spring clamp of the lock catch A of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model;

[0040] Figure 19 Structural schematic view of the lock catch B of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model;

[0041] Figure 20 Structural schematic view of the lock catch B of the bolt lock catch of the detachable sofa provided by the embodiment of the present utility model; Figure 19 Local enlarged view of the figure;

[0042] Figure 21 Structural schematic view of the sitting feeling assembly of the detachable sofa provided by the embodiment of the present utility model;

[0043] Figure 22 Local enlarged view of the figure; Figure 21 Local enlarged view of the figure;

[0044] Figure 23 Schematic view of the first step assembly step of the detachable sofa provided by the embodiment of the present utility model;

[0045] Figure 24 Local schematic view in the assembly step shown in the figure; Figure 23 Local schematic view in the assembly step shown in the figure;

[0046] Figure 25 Schematic view of the second step assembly step of the detachable sofa provided by the embodiment of the present utility model;

[0047] Figure 26for Figure 25 A partial schematic diagram of the assembly steps shown;

[0048] Figure 27 A schematic diagram illustrating the third assembly step of a detachable sofa according to an embodiment of this utility model;

[0049] Figure 28 for Figure 27 A partial schematic diagram of the assembly steps shown;

[0050] Figure 29 A schematic diagram illustrating the fourth assembly step of a detachable sofa provided in an embodiment of this utility model;

[0051] Figure 30 for Figure 29 A partial schematic diagram of the assembly steps shown.

[0052] In the diagram: 1. Base frame; 2. Seat software module; 21. Seat frame; 3. Armrest software module; 31. Armrest frame; 4. Backpack software module; 41. Backpack frame; 5. Sofa leg; 61. Locking fastener A; 611. Locking fastener body A; 6111. Insertion hole; 6112. Mounting slot; 6113. External thread; 6114. Polygonal keyhole; 612. Spring clip; 613. Locking fastener end panel; 62. Locking fastener B; 621. Column; 6211. Slot; 6212. Guide surface; 6213. Unmounting slope; 622. Locking fastener mounting plate; 7. Seating assembly; 71. Arched base support; 72. Fixing part; 73. Snake spring; 74. Conical spring; 75. Coil connector. Detailed Implementation

[0053] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0054] This embodiment provides a detachable sofa (also known as a modular sofa or modular combination sofa), and also provides a latching fastener and a seating component.

[0055] like Figures 1-30 As shown, the detachable sofa includes a base frame 1, seat upholstery module 2, armrest upholstery module 3, backpack upholstery module 4, and sofa legs 5. The base frame 1 is divided into single sofa base frame 1 and multi-seat sofa base frame 1. The multi-seat sofa base frame 1 is further divided into double micro sofa base frame 1, three-seat sofa base frame 1, four-seat sofa base frame 1, etc. The seat upholstery module 2, armrest upholstery module 3, backpack upholstery module 4, and sofa legs 5 all adopt a universal design to ensure interchangeability.

[0056] The seat soft module 2 comprises a seat frame 21, the armrest soft module 3 comprises an armrest frame 31, and the back soft module 4 comprises a back frame 41. The base frame 1, the seat frame 21, the armrest frame 31 and the back frame 41 are all steel inner frames, the outer sides of which are covered with sofa fabric, and the space between the sofa fabric and the steel inner frame and the space in the steel inner frame itself are filled with soft filling.

[0057] The latch assembly includes a latch assembly A61 and a latch assembly B62. The latch assembly A61 and the latch assembly B62 are exemplarily zinc alloy castings. The latch assembly A61 includes a latch assembly body A611 and a spring clip 612. One end of the latch assembly body A611 is provided with an insertion hole 6111 extending to the other end, which is exemplarily a through hole. The peripheral side of the latch assembly body A611 is provided with a mounting groove 6112, and a portion of the mounting groove 6112 communicates with the insertion hole 6111. The spring clip 612 is elastically clamped in the mounting groove 6112, and a portion of the spring clip protrudes into the insertion hole 6111 at the communication position of the mounting groove 6112 and the insertion hole 6111. The end of the latch assembly body A611 is integrally provided with a latch assembly end face plate 613. The peripheral side of the latch assembly body A611 is provided with an external thread 6113 between the latch assembly end face plate 613 and the mounting groove 6112. The end of the insertion hole close to the latch assembly end face plate 613 is provided with a polygonal key hole 6114 (such as an internal hexagonal hole). In this way, the latch assembly body A611 can be installed at a corresponding position of a sofa assembly (referring to a base frame 1, a seat soft module 2, an armrest soft module 3, a back soft module 4, and a sofa leg 5) through threaded connection. Exemplarily, the corresponding position of the sofa assembly is a pipe opening of a steel pipe, and a wood block or a high-strength plastic block is installed in the pipe opening. The wood block is provided with a positioning hole and is fixed by screwing the external thread 6113 of the latch assembly body A611. The high-strength plastic block is provided with an internal thread and is fixed by screwing the external thread 6113 of the latch assembly body A611. The latch assembly B62 includes a column body 621, and the peripheral side of the column body 621 is provided with a clamping groove 6211 matched with the portion of the spring clip protruding into the insertion hole 6111. When the column body 621 is inserted into the insertion hole 6111, the portion of the spring clip protruding into the insertion hole 6111 is clamped into the clamping groove 6211, so that the latch assembly A61 and the latch assembly B62 are relatively fixed, and the connection is completed. The fixed end of the column body 621 is integrally provided with a latch assembly mounting plate 622, and the latch assembly mounting plate 622 is provided with a bolt hole. The latch assembly B62 can be fixed at a corresponding position of the sofa assembly through the bolt hole. The insertion end of the column body 621 is provided with a guide surface 6212, and the diameter of the guide surface 6212 gradually increases in the direction away from the insertion end. On the one hand, it is easier to insert into the insertion hole 6111, and on the other hand, it can force the portion of the spring clip protruding into the insertion hole 6111 to move outward, so that the insertion end of the column body 621 smoothly passes through the area. The groove bottom of the clamping groove 6211 is provided with a clamping release inclined surface 6213, which gradually increases in the direction close to the insertion end. In this way, when disassembling, the portion of the spring clip protruding into the insertion hole 6111 can be moved outward by using a larger pulling force, so that the spring clip is pulled out of the clamping groove 6211.

[0058] The seat soft module 2, the armrest soft module 3 and the sofa foot 5 are detachably connected with the base frame 1 through the latch fastener, and the backpack soft module 4 is detachably connected with the seat soft module 2 through the latch fastener. Exemplarily, the bottom of the front and rear ends of the seat frame 21 is provided with a latch fastener A61, and the position corresponding to the latch fastener A61 of the seat frame 21 of the base frame 1 is provided with a latch fastener B62; the bottom of the armrest frame 31 is provided with a latch fastener A61, and the position corresponding to the latch fastener A61 of the armrest frame 31 of the base frame 1 is provided with a latch fastener B62; the top of the sofa foot 5 is provided with a latch fastener B62, and the position corresponding to the latch fastener B62 of the sofa foot 5 of the base frame 1 is provided with a latch fastener A61; the top of the rear end of the seat frame 21 is provided with a latch fastener A61, and the position corresponding to the latch fastener A61 of the seat frame 21 of the backpack frame 41 is provided with a latch fastener B62.

[0059] The sitting feeling assembly 7 comprises an arc-shaped bottom support 71, a fixed part 72, a snake-shaped spring 73 and a conical spring 74, one fixed part 72 is fixed to each end of the arc-shaped bottom support 71, the two ends of the snake-shaped spring 73 are fixed to the two fixed parts 72, the small end of the conical spring 74 is fixed to the arc-shaped bottom support 71, and the upper end of the conical spring 74 is fixed to the middle part of the snake-shaped spring 73, wherein two snake-shaped springs 73 are arranged in parallel and are spaced apart, and the conical spring 74 is fixed with the two snake-shaped springs 73 through a roll type connecting piece 75; the seat soft module 2 comprises a seat frame 21, and the fixed part 72 is detachably connected with the front and rear cross beams of the seat frame 21.

[0060] The detachable sofa provided by the embodiment has the following advantages or design points.

[0061] 1. The all-steel inner frame is used to replace the traditional board-wood structure sofa inner frame. The all-steel inner frame has the characteristics of high production precision and more solid material, reduces the damage risk of the sofa in the transportation process, and prolongs the service life of the product. In addition, the all-steel inner frame structure has production precision, which provides a basis for the production of modular components.

[0062] 2. The self-developed steel sofa seat frame system (sitting feeling assembly) is used to replace the traditional spring and rubber band structure, which solves the problem of short service life of the traditional seat frame using rubber band material and provides a more solid sitting feeling, so that the sofa can be used for a long time without being easily damaged.

[0063] 3. The self-developed latch fastener is used for each sofa component, so that the installation process of the sofa is very simple, without using any installation tool or professional training. Only by reading the instruction manual, the assembly of the sofa can be completed in a short time.

[0064] 4. Modular design is adopted, sofas of the same style and different sizes can replace corresponding components to assemble into sofas of different sizes. During the use of consumers, if the sofa is damaged, only the corresponding damaged parts need to be replaced by the consumer, thereby reducing the cost and period of after-sales maintenance. Consumers can extend the size of the sofa according to the requirements of the site, and only need to purchase the corresponding module components to extend the size of the sofa. For finished product warehouse type sales institutions, only the required combination accessories need to be reserved, and different sizes and colors of sofas need not be prepared; for example, a single sofa can be converted into a double sofa by replacing the hardware bottom frame and purchasing a new seat. If the user needs to replace the sofa fabric, only the favorite sofa cover needs to be purchased for self-replacement. The cost of replacing the new sofa is reduced, and the inventory pressure and high cost of spare parts of the finished product warehouse type sales are solved.

[0065] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A bolt lock fastener, characterized in that, The lock catch A (61) and the lock catch B (62); The lock catch A (61) comprises a lock catch body A (611) and a spring clip (612), one end of the lock catch body A (611) is provided with an insertion hole (6111) extending to the other end, the peripheral side of the lock catch body A (611) is provided with a mounting groove (6112), and a part of the mounting groove (6112) is communicated with the insertion hole (6111), the spring clip (612) is elastically clamped in the mounting groove (6112), and a part of the spring clip protrudes into the insertion hole (6111) at the communication part of the mounting groove (6112) and the insertion hole (6111); The lock catch B (62) comprises a column body (621), and the peripheral side of the column body (621) is provided with a clamping groove (6211) used in cooperation with the part of the spring clip protruding into the insertion hole (6111).

2. The latch assembly of claim 1, wherein The lock catch A (61) further comprises a lock catch end panel (613) integrally arranged at the end of the lock catch body A (611), the peripheral side of the lock catch body A (611) is provided with an external thread (6113) located between the lock catch end panel (613) and the mounting groove (6112), and the end of the insertion hole close to the lock catch end panel (613) is provided with a polygonal keyhole (6114).

3. The latch assembly of claim 1, wherein The lock catch B (62) further comprises a lock catch mounting plate (622) integrally fixed to the fixed end of the column body (621), and the lock catch mounting plate (622) is provided with a bolt hole.

4. The latch assembly of claim 3, wherein The insertion end of the column body (621) is provided with a guide surface (6212) gradually increasing in diameter in the direction away from the insertion end, and the groove bottom of the clamping groove (6211) is provided with a clamping withdrawal inclined surface (6213) gradually increasing in the direction close to the insertion end.

5. A knock-down sofa characterized by The sofa comprises a base frame (1), a seat soft module (2), an armrest soft module (3), a back soft module (4), a sofa leg (5) and the latch of any one of claims 1-4, the seat soft module (2), the armrest soft module (3) and the sofa leg (5) are detachably connected with the base frame (1) through the latch, and the back soft module (4) is detachably connected with the seat soft module (2) through the latch.

6. The sectional sofa according to claim 5, wherein, The detachable sofa further comprises a sitting feeling assembly (7), the sitting feeling assembly (7) comprises an arc-shaped bottom support (71), a fixing part (72), a serpentine spring (73) and a conical spring (74), one fixing part (72) is fixed at each end of the arc-shaped bottom support (71), the two ends of the serpentine spring (73) are fixed to the two fixing parts (72), and the small end of the conical spring (74) is fixed to the arc-shaped bottom support (71), and the upper end of the conical spring (74) is fixed to the middle part of the serpentine spring (73), wherein the serpentine spring (73) is provided with two, the two serpentine springs (73) are arranged in parallel and are spaced, and the conical spring (74) and the two serpentine springs (73) are fixed through a roll type connecting piece (75); the seat soft module (2) comprises a seat frame (21), and the fixing part (72) is detachably connected with front and rear cross beams of the seat frame (21).

7. The sectional sofa according to claim 5, wherein, The seat soft module (2) comprises a seat frame (21), and the bottom of the front and rear ends of the seat frame (21) is provided with a lock piece A (61), and the bottom frame (1) is provided with a lock piece B (62) at a position corresponding to the lock piece A (61) of the seat frame (21); the armrest soft module (3) comprises an armrest frame (31), and the bottom of the armrest frame (31) is provided with a lock piece A (61), and the bottom frame (1) is provided with a lock piece B (62) at a position corresponding to the lock piece A (61) of the armrest frame (31); the top of the sofa leg (5) is provided with a lock piece B (62), and the bottom frame (1) is provided with a lock piece A (61) at a position corresponding to the lock piece B (62) of the sofa leg (5); the top of the rear end of the seat frame (21) is provided with a lock piece A (61), and the back soft module (4) comprises a back frame (41), and the back frame (41) is provided with a lock piece B (62) at a position corresponding to the lock piece A (61) of the seat frame (21).

8. The sectional sofa according to claim 7, wherein, The bottom frame (1), the seat frame (21), the armrest frame (31) and the back frame (41) are all steel inner frames, the outer side of the steel inner frame is covered with sofa fabric, and the space between the sofa fabric and the steel inner frame and the space of the steel inner frame itself is filled with soft filling.

9. The sectional sofa according to claim 5, wherein, The bottom frame (1) is divided into a unit sofa bottom frame and a multi-position sofa bottom frame.

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