Sofa bed with a large unfolding area

Abstract

This utility model belongs to the field of sofa bed technology, specifically relating to a sofa bed with a large unfolded area. Addressing the shortcomings of existing pull-out sofa beds, which have a relatively small surface area when used as a bed, this utility model adopts the following technical solution: A sofa bed with a large unfolded area includes: a fixed assembly, comprising a fixed frame and a backrest assembly, the backrest assembly being movably connected to the fixed frame; and a pull-out assembly, movably connected to the fixed assembly, comprising a pull-out base frame, a first swing frame, and a second swing frame; when folded up for use as a sofa, the backrest assembly is vertical, and the first mattress support of the first swing frame is located above the second mattress support of the second swing frame; when unfolded for use as a bed, the pull-out base frame and the fixed frame are completely offset along the pull-out direction, the first mattress support of the first swing frame and the second mattress support of the second swing frame are horizontal, and the backrest assembly is horizontal. The beneficial effect of this utility model is that by fully extending the pull-out assembly (i.e., with three movable parts), a larger bed surface area is provided.

Description

Technical Field

[0001] This utility model belongs to the field of sofa bed technology, specifically relating to sofa beds with a large unfolded area. Background Technology

[0002] A sofa bed combines the functions of a sofa and a bed, allowing it to be converted into a bed when needed. One existing type of pull-out sofa bed includes a fixed assembly and a pull-out assembly, with the function being converted by pulling out the pull-out assembly (and potentially performing other flipping operations).

[0003] Existing sofa beds with pull-out assemblies do not have assemblies that can be fully pulled out of the fixed assembly, resulting in a small usable area when unfolded as a bed. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing pull-out sofa beds, which have a small area when used as a bed. It provides a sofa bed with a large unfolded area by fully pulling out the pull-out assembly, which includes a first swing frame and a second swing frame, and by folding down the backrest, etc.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a sofa bed with a large unfolded area, the sofa bed with a large unfolded area comprising:

[0006] The fixed assembly includes a fixed frame and a backrest assembly, the backrest assembly being movably connected to the fixed frame;

[0007] A pull-out assembly is movably connected to a fixed assembly and includes a pull-out base frame, a first swing frame and a second swing frame. The first swing frame is movably connected to the pull-out base frame and includes a first mattress support part. The second swing frame is movably connected to the first swing frame and includes a second mattress support part.

[0008] When folded up and used as a sofa, the backrest assembly is vertical, and the first mattress support of the first swing frame is located above the second mattress support of the second swing frame; when unfolded and used as a bed, the pull-out base frame and the fixed frame are completely offset along the pull-out front and back direction, the first mattress support of the first swing frame and the second mattress support of the second swing frame are horizontal, and the backrest assembly is horizontal.

[0009] The sofa bed of this utility model with a large unfolded area has a fixed assembly including a backrest assembly movably connected to a fixed frame, and a pull-out assembly including a pull-out base frame, a first swing frame and a second swing frame. The first swing frame and the pull-out base frame are movably connected and include a first mattress support part, and the second swing frame and the first swing frame are movably connected and include a second mattress support part. When unfolded and used as a bed, the pull-out assembly can be fully pulled out, and the backrest assembly, the first mattress on the first swing frame and the second mattress on the second swing frame together form a bed support surface, thereby providing a larger bed surface area.

[0010] As an improvement, the outer end of the first swing frame is rotatably connected to the pull-out base frame, and the rear end of the second swing frame is rotatably connected to the first swing frame.

[0011] As an improvement, the fixed frame is provided with support plates at both ends in the left and right length directions. When stored and used as a sofa, the support plates are located between the first mattress support part of the first swing frame and the second mattress support part of the second swing frame. When unfolded and used as a bed, the second mattress support part of the second swing frame is supported by the support plates.

[0012] As an improvement, the rear end of the second swing frame is provided with an L-shaped support member. When the frame is folded up and used as a sofa, the horizontal part of the support member is on top and at the back. When the frame is unfolded and used as a bed, the first mattress support part of the first swing frame is supported by the horizontal part of the support member.

[0013] As an improvement, the outer end of the pull-out base frame and the outer end of the first swing frame are rotatably connected by a first hinge; the first swing frame also includes a front baffle mounting part.

[0014] As an improvement, the pull-out assembly also includes an upright member fixed to the rear end of the pull-out base frame, the upper end of the upright member being rotatably connected to the second swing frame via a second hinge.

[0015] As an improvement, the frame includes a back panel, and the backrest assembly includes a separable pad and a backrest pad. When unfolded for use as a bed, the pad supports the backrest pad, and the backrest pad, the first mattress, and the second mattress are flush.

[0016] As an improvement, the lower end of the pad is rotatably connected to the back plate.

[0017] As an improvement, the pad and the back plate are rotatably connected by a third hinge. The third hinge includes a fixed connector on the back plate and an L-shaped mounting member rotatably connected to the fixed connector. The mounting member and the back plate form a mounting groove, and the support plate is located in the mounting groove.

[0018] And / or, when stored as a sofa, the backrest cushion is supported by the first mattress on the first swing frame; and / or,

[0019] The backrest cushion has an L-shaped notch on the back side, with the horizontal section of the notch at the top.

[0020] As an improvement, the pull-out assembly also includes a mattress placement plate fixed to the pull-out base frame, on which a second mattress is provided. When stored for use as a sofa, the second mattress is located below the second swing frame.

[0021] The advantages of this invention's sofa bed with a large unfolded area are as follows: the fixed assembly includes a backrest assembly movably connected to the fixed frame, and the pull-out assembly includes a pull-out base frame, a first swing frame, and a second swing frame. The first swing frame and the pull-out base frame are movably connected and include a first mattress support part, and the second swing frame and the first swing frame are movably connected and include a second mattress support part. When unfolded for use as a bed, the pull-out assembly can be fully pulled out, and the backrest assembly, the first mattress on the first swing frame, and the second mattress on the second swing frame together form a bed support surface, thereby providing a larger bed surface area. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of the sofa bed according to Embodiment 1 of this utility model (sofa state).

[0023] Figure 2 This is a structural schematic diagram (bed state) of the sofa bed according to Embodiment 1 of this utility model.

[0024] Figure 3 This is a schematic diagram of the sofa bed after the right armrest is hidden in Embodiment 1 of this utility model (sofa state).

[0025] Figure 4 This is a schematic diagram of the sofa bed after the right armrest is hidden in Embodiment 1 of this utility model (bed state).

[0026] Figure 5 This is a schematic diagram of the frame structure of the sofa bed according to Embodiment 1 of this utility model (sofa state).

[0027] Figure 6 This is a schematic diagram of the frame structure of the sofa bed according to Embodiment 1 of this utility model (bed state).

[0028] Figure 7 This is a schematic diagram of the fixing frame of the sofa bed according to Embodiment 1 of this utility model.

[0029] Figure 8 This is a schematic diagram of the frame structure of the pull-out assembly of the sofa bed according to Embodiment 1 of this utility model (sofa state).

[0030] Figure 9 This is a structural schematic diagram of the limiting assembly of the sofa bed according to Embodiment 1 of this utility model (sofa state).

[0031] Figure 10 This is a schematic diagram of the limiting assembly of the sofa bed according to Embodiment 1 of this utility model (bed state).

[0032] In the diagram, 01 is the fixed assembly; 02 is the pull-out assembly; and 03 is the limit assembly.

[0033] 1. Fixing frame; 11. Guide component; 12. Anti-detachment component; 13. Support plate; 14. Back plate;

[0034] 2. Pull-out base frame; 21. Mattress placement board; 22. Vertical support;

[0035] 3. First swing frame; 31. First mattress support; 32. Front panel mounting part; 33. Mattress placement board;

[0036] 4. Second swing frame; 41. Second mattress support; 42. Support component;

[0037] 5. Straight travel assembly; 51. Straight travel piece; 511. Angle limiting part; 52. Roller;

[0038] 6. Folding assembly; 61. First limiting member; 62. Second limiting member; 63. Third limiting member;

[0039] 7. Backrest assembly; 71. Pad; 72. Backrest cushion;

[0040] 81. First hinge; 82. Second hinge; 83. Third hinge;

[0041] 91. First mattress; 92. Second mattress. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be explained and described below. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0043] See Figures 1 to 10 The sofa bed with a large unfolded area according to this utility model embodiment includes:

[0044] The fixed assembly includes a fixed frame and a backrest assembly, the backrest assembly being movably connected to the fixed frame;

[0045] A pull-out assembly is movably connected to a fixed assembly and includes a pull-out base frame, a first swing frame and a second swing frame. The first swing frame is movably connected to the pull-out base frame and includes a first mattress support part. The second swing frame is movably connected to the first swing frame and includes a second mattress support part.

[0046] When folded up and used as a sofa, the backrest assembly is vertical, and the first mattress support of the first swing frame is located above the second mattress support of the second swing frame; when unfolded and used as a bed, the pull-out base frame and the fixed frame are completely offset along the pull-out front and back direction, the first mattress support of the first swing frame and the second mattress support of the second swing frame are horizontal, and the backrest assembly is horizontal.

[0047] The sofa bed of this utility model with a large unfolded area has a fixed assembly including a backrest assembly movably connected to a fixed frame, and a pull-out assembly including a pull-out base frame, a first swing frame and a second swing frame. The first swing frame and the pull-out base frame are movably connected and include a first mattress support part, and the second swing frame and the first swing frame are movably connected and include a second mattress support part. When unfolded and used as a bed, the pull-out assembly can be fully pulled out, and the backrest assembly, the first mattress on the first swing frame and the second mattress on the second swing frame together form a bed support surface, thereby providing a larger bed surface area.

[0048] Example 1

[0049] See Figures 1 to 10 The sofa bed with a large unfolded area according to Embodiment 1 of this utility model includes:

[0050] The fixed assembly 01 includes a fixed frame 1 and a backrest assembly 7, the backrest assembly 7 being movably connected to the fixed frame 1;

[0051] The pull-out assembly 02 is movably connected to the fixed assembly 01 and includes a pull-out base frame 2, a first swing frame 3 and a second swing frame 4. The first swing frame 3 is movably connected to the pull-out base frame 2 and includes a first mattress support part 31. The second swing frame 4 is movably connected to the first swing frame 3 and includes a second mattress support part 41.

[0052] When folded up and used as a sofa, the backrest assembly 7 is vertical, and the first mattress support 31 of the first swing frame 3 is located above the second mattress support 41 of the second swing frame 4. When unfolded and used as a bed, the pull-out base frame 2 and the fixed frame 1 are completely offset along the pull-out front and back direction, the first mattress support 31 of the first swing frame 3 and the second mattress support 41 of the second swing frame 4 are horizontal, and the backrest assembly 7 is horizontal.

[0053] In this embodiment, the outer end of the first swing frame 3 is rotatably connected to the pull-out base frame 2, and the rear end of the second swing frame 4 is rotatably connected to the first swing frame 3.

[0054] In this embodiment, the fixed frame 1 has support plates 13 at both ends in the left and right length directions. When it is stored and used as a sofa, the support plates 13 are located between the first mattress support part 31 of the first swing frame 3 and the second mattress support part 41 of the second swing frame 4. When it is unfolded and used as a bed, the second mattress support part 41 of the second swing frame 4 is supported by the support plates 13.

[0055] In this embodiment, the rear end of the second swing frame 4 is provided with an L-shaped support member 42. When it is folded up and used as a sofa, the horizontal part of the support member 42 is on top and at the back. When it is unfolded and used as a bed, the first mattress support part 31 of the first swing frame 3 is supported by the horizontal part of the support member 42.

[0056] In this embodiment, the outer end of the pull-out base frame 2 and the outer end of the first swing frame 3 are rotatably connected by the first hinge 81; the first swing frame 3 also includes a front baffle mounting part 32.

[0057] In this embodiment, the pull-out assembly 02 also includes an upright member 22 fixed to the rear end of the pull-out base frame 2, and the upper end of the upright member 22 and the second swing frame 4 are rotatably connected by the second hinge 82.

[0058] In this embodiment, the fixing frame 1 includes a back plate 14, and the backrest assembly 7 includes a separable pad 71 and a backrest pad 72. When unfolded for use as a bed, the pad 71 supports the backrest pad 72, and the backrest pad 72, the first mattress 91 and the second mattress 92 are flush.

[0059] In this embodiment, the lower end of the pad 71 is rotatably connected to the back plate 14.

[0060] In this embodiment, the pad 71 and the back plate 14 are rotatably connected by a third hinge 83. The third hinge 83 includes a fixed connector on the back plate 14 and an L-shaped mounting member rotatably connected to the fixed connector. The mounting member and the back plate 14 form a mounting groove, and the support plate 13 is located in the mounting groove.

[0061] In this embodiment, when stored as a sofa, the backrest cushion 72 is supported by the first mattress 91 on the first swing frame 3.

[0062] In this embodiment, the backrest cushion 72 has an L-shaped notch on the rear side, with the horizontal section of the notch facing upwards.

[0063] In this embodiment, the pull-out assembly 02 also includes a mattress placement plate 3321 fixed on the pull-out base frame 2. The mattress placement plate 3321 is provided with a second mattress 92. When stored and used as a sofa, the second mattress 92 is located below the second swing frame 4.

[0064] In this embodiment, the sofa bed also includes a limiting assembly 03, which includes a straight-moving component 5 and a folding component 6. The folding component 6 includes a first limiting member 61 and a second limiting member 62 that are movably connected. One end of the first limiting member 61 is movably connected to the straight-moving component 5, and the second limiting member 62 is movably connected to the pull-out base frame 2. A blocking and anti-detachment member 12 that blocks the straight-moving component 5 is formed on the fixed frame 1.

[0065] In this embodiment, the two ends of the first limiting member 61 are rotatably connected to the straight-moving component 5 and the second limiting member 62, respectively. The folding component 6 also includes a third limiting member 63, one end of which is fixedly connected to the pull-out base frame 2, and the other end is rotatably connected to the second limiting member 62.

[0066] In this embodiment, in the storage state, the first limiting member 61 is vertically arranged and its lower end is rotatably connected to the fixed frame 1, and the third limiting member 63 is horizontally arranged and its front part is fixedly connected to the pull-out base frame 2.

[0067] In this embodiment, the first limiting member 61 and the second limiting member 62 are inverted V-shaped when unfolded, with the ends of the first limiting member 61 and the middle of the second limiting member 62 being lower than the ends.

[0068] In this embodiment, an angle limiting part 511 is formed on the straight component 5, and the first limiting member 61 abuts against the angle limiting part 511 in the unfolded state.

[0069] In this embodiment, a guide groove is formed at the bottom of the fixing frame 1, and the blocking anti-detachment member 12 is provided at the outer end of the guide groove. The straight component 5 includes a straight component 51 in the guide groove and a roller 52 supporting the straight component 51. The straight component 51 is rotatably connected to the first limiting member 61. An angle limiting part 511 is formed on the straight component 51 to limit the angle between the first limiting member 61 and the second limiting member 62 in the unfolded state of the folding component 6.

[0070] In this embodiment, the limiting assembly 03 includes two sets of straight-moving components 5 and two sets of limiting assemblies 03. The two sets of straight-moving components 5 are connected by connecting rods in the left and right length directions.

[0071] In this embodiment, the straight-line component 5 includes four rollers 52.

[0072] In this embodiment, the first connector includes a first flat plate portion and first connecting portions at both ends, the second connector includes a second flat plate portion and a second connecting portion at the rear end, and the third connector includes a third flat plate portion and third connecting portions at both ends. The straight-line component 5 is rotatably connected to the first connecting portion, the first connecting portion and the second connecting portion, the second connecting portion and the third connecting portion via pins.

[0073] In this embodiment, the height of the first limiting member 61 is lower than the height of the fixing frame 1.

[0074] In this embodiment, the pull-out assembly 02 also includes a roller assembly disposed on the pull-out base frame 2, and the roller assembly includes a plurality of directional rollers 52.

[0075] In this embodiment, the fixing frame 1 includes four rectangular frames: a bottom frame, a rear frame, and left and right frames. Two guide members 11 are provided at both ends of the bottom rectangular frame along its left and right length directions, forming guide grooves. The straight-running component 5 is located in the guide groove, and a blocking anti-detachment component 12 is provided at the outer end of the guide groove. Two support plates 13 are provided above the left and right rectangular frames of the fixing frame 1, and the rear outer ends of the support plates 13 form guide surfaces. A back plate 14 is provided on the rear side of the rear rectangular frame of the fixing frame 1. Handrail mounting components are provided on the outer sides of the left and right rectangular frames, and the left and right handrails are mounted on the handrail mounting components. Each rectangular frame of the fixing frame 1 is made of square tubing.

[0076] In this embodiment, the pull-out base frame 2 includes two rectangular frames: a bottom frame and a front frame. The bottom rectangular frame has multiple reinforcing tubes running in the front-to-back direction, and the rear end of the bottom rectangular frame has two vertical members 22. Both rectangular frames of the pull-out base frame 2 are made of square tubing.

[0077] In this embodiment, the first swing frame 3 includes two rectangular frames, an upper one and a front one. The front rectangular frame and the bottom rectangular frame of the pull-out base frame 2 are rotatably connected by a first hinge 81. The front rectangular frame of the first swing frame 3 is provided with a reinforcing tube in the height direction. Both rectangular frames of the first swing frame 3 are made of square tubing.

[0078] In this embodiment, the second swing frame 4 includes a rectangular frame, and the rear end of the rectangular frame and the upright member 22 on the pull-out base frame 2 are rotatably connected by a second hinge 82. Two support members 42 are provided on the rear side of the rectangular frame of the second swing frame 4.

[0079] In this embodiment, when in sofa mode, the rear end of the first swing frame 3 is supported by the support plate 13 on the fixed frame 1, the second swing frame 4 is not under force, the second mattress 92 is placed on the mattress placement plate 3321 of the pull-out base frame 2, the first mattress 91 prevents the pad 71 from falling down, and the first mattress 91 supports the backrest cushion 72. The second swing frame 4 is higher on the outside and lower on the inside.

[0080] In this embodiment, during the unfolding process, the pull strap on the pull base frame 2 of the pull assembly 02 is held (the pull strap can be stored). During the process of pulling out the pull assembly 02, since the front end tube of the bottom rectangular frame of the fixing frame 1 forms a clearance groove to avoid the bottom roller 52 below the pull base frame 2, and the pull base frame 2 is provided with an upper roller 52, and the support plate 13 on the fixing frame 1 forms a guide surface, the pull assembly 02 is pulled out relatively easily. Meanwhile, due to the setting of the limit assembly 03, the pull-out assembly 02 will not be able to be pulled further after it is fully pulled out of the fixed frame 1 and the displacement is in place. At this time, the first swing frame 3 is flipped forward and the second swing frame 4 is flipped backward. The second swing frame 4 is placed on the support plate 13 of the fixed frame 1. Then, the second mattress 92 is taken out and placed on the second swing frame 4. The first swing frame 3 is flipped backward and placed on the support member 42 of the first swing frame 3 (usually the first mattress 91 needs to be taken out and put in). Finally, the backrest cushion 72 is removed, the pad 71 is flipped down, and the backrest cushion 72 is placed on the pad 71, thus completing the unfolding.

[0081] The beneficial effects of the sofa bed with a large unfolded area in Embodiment 1 of this utility model are as follows: The fixed assembly 01 includes a backrest assembly 7 movably connected to the fixed frame 1, and the pull-out assembly 02 includes a pull-out base frame 2, a first swing frame 3, and a second swing frame 4. The first swing frame 3 and the pull-out base frame 2 are movably connected and include a first mattress support 31. The second swing frame 4 and the first swing frame 3 are movably connected and include a second mattress support 41. When unfolded for use as a bed, the pull-out assembly 02 can be fully pulled out. The backrest assembly 7, the first mattress 91 on the first swing frame 3, and the second mattress 92 on the second swing frame 4 together form a bed support surface, thereby providing a larger bed surface area. The second mattress 92 can be placed on the mattress placement plate 3321 of the pull-out base frame 2, eliminating the need for... The second mattress 92 is stored in another location; it includes a limiting assembly 03, which includes a straight component 5 and a folding component 6. The folding component 6 includes a first limiting member 61 and a second limiting member 62 that are movably connected. A blocking and anti-detachment member 12 is formed on the fixing frame 1 to block the straight component 5. During the process of pulling out the pull-out assembly 02, when the straight component 5 is blocked by the blocking and anti-detachment member 12 of the fixing frame 1 of the fixing assembly 01, the first limiting member 61 and the second limiting member 62 of the folding component 6 can continue to unfold, thereby supporting a larger displacement of the pull-out assembly 02. An angle limiting part 511 is formed on the straight component 51 of the straight component 5. In the maximum unfolded state, the first limiting member 61 and the second limiting member 62 are inverted V-shaped, thereby ensuring that the pull-out assembly 02 can be reset smoothly.

[0082] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A sofa bed with a large unfolded area, characterized by: Large sofa beds include: The fixed assembly (01) includes a fixed frame (1) and a backrest assembly (7), the backrest assembly (7) being movably connected to the fixed frame (1); The pull-out assembly (02) is movably connected to the fixed assembly (01) and includes a pull-out base frame (2), a first swing frame (3) and a second swing frame (4). The first swing frame (3) and the pull-out base frame (2) are movably connected and include a first mattress support (31). The second swing frame (4) and the first swing frame (3) are movably connected and include a second mattress support (41). When folded up and used as a sofa, the backrest assembly (7) is vertical, and the first mattress support (31) of the first swing frame (3) is located above the second mattress support (41) of the second swing frame (4). When unfolded and used as a bed, the pull-out base frame (2) and the fixed frame (1) are completely offset along the pull-out front and back direction, the first mattress support (31) of the first swing frame (3) and the second mattress support (41) of the second swing frame (4) are horizontal, and the backrest assembly (7) is horizontal.

2. The sofa bed with a large unfolded area according to claim 1, characterized in that: The outer end of the first swing frame (3) is rotatably connected to the pull-out base frame (2), and the rear end of the second swing frame (4) is rotatably connected to the first swing frame (3).

3. The sofa bed with a large unfolded area according to claim 2, characterized in that: The fixed frame (1) has support plates (13) at both ends in the left and right length direction. When it is stored and used as a sofa, the support plates (13) are located between the first mattress support part (31) of the first swing frame (3) and the second mattress support part (41) of the second swing frame (4). When it is unfolded and used as a bed, the second mattress support part (41) of the second swing frame (4) is supported by the support plates (13).

4. The sofa bed with a large unfolded area according to claim 3, characterized in that: The rear end of the second swing frame (4) is provided with an L-shaped support member (42). When the support member (42) is folded up and used as a sofa, the horizontal part of the support member (42) is on top and at the back. When the first swing frame (3) is unfolded and used as a bed, the first mattress support part (31) of the first swing frame (3) is supported by the horizontal part of the support member (42).

5. The sofa bed with a large unfolded area according to claim 2, characterized in that: The outer end of the pull-out base frame (2) and the outer end of the first swing frame (3) are rotatably connected by the first hinge (81); the first swing frame (3) also includes a front baffle mounting part (32).

6. The sofa bed with a large unfolded area according to claim 2, characterized in that: The pull-out assembly (02) also includes an upright member (22) fixed to the rear end of the pull-out base frame (2), and the upper end of the upright member (22) and the second swing frame (4) are rotatably connected by a second hinge (82).

7. The sofa bed with a large unfolded area according to claim 1, characterized in that: The frame (1) includes a back panel (14), and the backrest assembly (7) includes a separable pad (71) and a backrest cushion (72). When unfolded for use as a bed, the pad (71) supports the backrest cushion (72), and the backrest cushion (72), the first mattress (91), and the second mattress (92) are flush.

8. The sofa bed with a large unfolded area according to claim 7, characterized in that: The lower end of the pad (71) is rotatably connected to the back plate (14).

9. The sofa bed with a large unfolded area according to claim 8, characterized in that: The pad (71) and the back plate (14) are rotatably connected by a third hinge (83). The third hinge (83) includes a fixed connector on the back plate (14) and an L-shaped mounting member rotatably connected to the fixed connector. The mounting member and the back plate (14) form a mounting groove, and the support plate (13) is located in the mounting groove. And / or, when stored as a sofa, the backrest cushion (72) is supported by the first mattress (91) on the first swing frame (3); and / or, The backrest cushion (72) has an L-shaped notch on the back side, with the horizontal section of the notch at the top.

10. The sofa bed with a large unfolded area according to claim 1, characterized in that: The pull-out assembly (02) also includes a mattress placement plate (33)(21) fixed on the pull-out base frame (2). A second mattress (92) is provided on the mattress placement plate (33)(21). When stored for use as a sofa, the second mattress (92) is located below the second swing frame (4).

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