Fixing structure of sofa mattress layer and sofa bed

Abstract

The utility model provides a fixing structure of a sofa mattress layer. A sofa bed comprises a left armrest, a right armrest and a bed frame fixed between the left armrest and the right armrest, and an elastic layer and a cushion layer are sequentially arranged on the bed frame; a plurality of first connecting pieces are arranged on the elastic layer at intervals in the circumferential direction, and a plurality of second connecting pieces are arranged on the lower surface of the cushion layer at intervals in the circumferential direction; and the first connecting piece and the second connecting piece pass through the middle connecting piece. The utility model further provides a sofa bed. The sofa bed comprises a structural framework, a cushion layer and an elastic layer, the cushion layer and the elastic layer adopt the fixing structure; the structural framework comprises a left armrest, a right armrest, a bed frame and a bed board; the bed frame comprises a first bed frame and a second bed frame which are sequentially arranged in the width direction of the armrests; the first bed frame is fixedly connected between the left armrest and the right armrest; the second bed frame is rotationally connected between the left armrest and the right armrest; and the bed plates are respectively connected in the first bed frame and the second bed frame.

Description

Technical Field

[0001] The utility model relates to a piece of furniture, in particular to a sofa bed. Background Art

[0002] As people's material life gradually improves, residents' demand for furniture products also shows a diversified trend. Among them, sofa beds have become a popular furniture product. Existing sofa beds have some defects, for example: the existing sofa beds are not smoothly switched between the two states, and operators with less strength usually find it difficult to complete it alone; the existing sofa beds may not be stable enough when used as sofas, and the angle between the seat and the backrest may change, affecting the comfort level; and the folding method of the existing folding beds is also relatively single, which cannot meet the various needs of users.

[0003] To put it another way, even if the above problems can be solved, the current sofa bed still has many shortcomings in details. For example, the cushion and the elastic layer are prone to relative movement during use; the base support structure of the sofa bed cannot support both the main frame of the sofa configuration and the main frame of the bed configuration; the installation method between the bed frame and the bed board of the main frame is unreasonable; the various parts of the sofa bed cannot be split and folded; if there is a spring module, the installation method of the spring module is usually not reasonable. Utility Model Content

[0004] The main technical problem to be solved by the utility model is to provide a fixing structure of a sofa mattress layer, which can fix the cushion layer and the elastic layer together to avoid relative movement between the cushion layer and the elastic layer.

[0005] In order to solve the above technical problems, the utility model provides a fixing structure of a sofa mattress layer, the sofa bed comprising a left armrest, a right armrest, and a bed frame fixed between the left armrest and the right armrest, an elastic layer and a cushion layer are sequentially arranged on the bed frame; a plurality of first connecting members are arranged at intervals along the circumferential direction on the elastic layer, and a plurality of second connecting members are arranged at intervals along the circumferential direction on the lower surface of the cushion layer; the first connecting members and the second connecting members are connected through an intermediate connecting member.

[0006] In some embodiments, the first connecting member and the second connecting member are slots respectively, and the first connecting member and the second connecting member are connected via an intermediate connecting member.

[0007] In some embodiments, the intermediate connecting member includes a connecting belt and plug blocks arranged at both ends of the connecting belt.

[0008] In some embodiments, the elastic layer includes a plurality of elastic units arranged in an array; the elastic units are respectively provided with the first connecting members on both sides of the array in the transverse and longitudinal directions; and the first connecting members of two adjacent elastic units are connected via the intermediate connecting member.

[0009] This embodiment further provides a sofa bed, comprising: a structural frame, a cushion layer and an elastic layer; the cushion layer and the elastic layer adopt the above-mentioned fixed structure.

[0010] In some embodiments, the structural frame includes a left armrest, a right armrest, a bed frame, and a bed board; the bed frame includes a first bed frame and a second bed frame arranged in sequence along the width direction of the armrest; the first bed frame is fixedly connected between the left armrest and the right armrest; the second bed frame is rotatably connected between the left armrest and the right armrest;

[0011] The bed board is connected to the first bed frame and the second bed frame respectively.

[0012] In some embodiments, the second bed frame has a first position and a second position relative to the first bed frame. When the second bed frame is in the first position, the angle between the first bed frame and the second bed frame is 180°; when the second bed frame is in the second position, the angle between the first bed frame and the second bed frame is less than 180°.

[0013] In some embodiments, the left armrest and the right armrest are rotatably connected to the second bed frame via a folding hinge respectively;

[0014] The folding hinge includes a first arm and a second arm hingedly connected at one end; the other end of the first arm is fixedly connected to the left armrest or the right armrest, and the other end of the second arm is fixedly connected to the second bed frame.

[0015] In some embodiments, the left armrest and the right armrest are fixedly connected via a cross bar.

[0016] In some embodiments, when the second bed frame is located at the first position, a recessed portion is provided at a position of the cross bar corresponding to the position where the cross bar abuts against the second bed frame.

[0017] In some embodiments, both side frames of the first bed frame and the second bed frame along the length direction are respectively provided with insertion holes for fixing the bed board.

[0018] In some embodiments, the inner surface of the frame on the opposite side of the first bed frame and the second bed frame is provided with the insertion holes at intervals; the upper surface of the frame on the opposite side of the first bed frame and the second bed frame is provided with the insertion holes at intervals.

[0019] In some embodiments, the bed board includes a plurality of grid-shaped bed board units; one side of the grid-shaped bed board unit is provided with a latch extending in a horizontal direction, and the other side is provided with a latch extending in a height direction.

[0020] In some of the embodiments, a plurality of fixing members for fixing the elastic layer are arranged at intervals on the surface of the bed board.

[0021] In some embodiments, the fixing member is a straight-shaped protrusion extending along the height direction.

[0022] Compared with the prior art, the utility model has the beneficial effect that by respectively arranging the first connecting member and the second connecting member on the cushion layer and the elastic layer, the first connecting member and the second connecting member are connected by an intermediate connecting member, so that the cushion layer and the elastic layer can be fixed together to avoid relative movement between the cushion layer and the elastic layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of embodiment 1 of the utility model;

[0024] Figure 2 This is an exploded view of Example 1 of the utility model;

[0025] Figure 3-Figure 12 This is an assembly flow chart of the sofa bed in Embodiment 1 of the present utility model;

[0026] Figure 13-14 This is a schematic diagram of the backrest angle adjustment in Example 1 of the utility model;

[0027] Fig.15 It is a schematic diagram of the elastic unit in Example 1 of the utility model;

[0028] Fig.16 It is a schematic diagram of the elastic unit in Embodiment 1 of the utility model from another angle;

[0029] Figure 17-Figure 18 This is a schematic diagram of the connection of the elastic unit array in Example 1 of the utility model;

[0030] Fig.19 It is a schematic diagram of the elastic unit in Embodiment 2 of the present utility model;

[0031] Fig. 20 It is a schematic diagram of the elastic unit in Embodiment 2 of the present utility model from another angle;

[0032] Figure 21-23 This is a schematic diagram of the connection of the elastic unit array in Example 2 of the utility model;

[0033] Fig.24 It is a schematic diagram of the elastic unit in Embodiment 3 of the present utility model;

[0034] Fig.25 It is a schematic diagram of the elastic unit in Embodiment 3 of the present utility model from another angle;

[0035] Figure 26-Figure 28 This is a schematic diagram of the connection of the elastic unit array in Example 3 of the utility model;

[0036] Fig.29 It is a schematic diagram of the elastic unit in Embodiment 4 of the present utility model;

[0037] Fig.30 It is a schematic diagram of the elastic unit in Embodiment 4 of the present utility model from another angle;

[0038] Figure 31-Figure 34 This is a schematic diagram of the connection of the elastic unit array in Example 4 of the utility model;

[0039] Figure 35-Figure 36 for Fig.32 and Fig.33 A partial enlarged view of

[0040] Fig.37 It is a schematic diagram of the elastic unit in Example 5 of the utility model;

[0041] Fig.38 It is a schematic diagram of the elastic unit in Embodiment 5 of the present utility model from another angle;

[0042] Figure 39-41 This is a schematic diagram of the connection of the elastic unit array in Example 5 of the utility model;

[0043] Fig.42 It is a schematic diagram of the elastic unit in Example 6 of the utility model;

[0044] Fig.43 It is a schematic diagram of the elastic unit in Embodiment 6 of the present utility model from another angle;

[0045] Figure 44-Figure 47 This is a schematic diagram of the connection of the elastic unit array in Example 6 of the utility model;

[0046] Fig.48 This is an enlarged view of the connection of the elastic unit in Example 6 of the utility model. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships described in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "installed / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0050] Example 1

[0051] refer to Figure 1-Figure 17 This embodiment provides a foldable sofa bed, the backrest part of the sofa bed can be laid flat so that the backrest and the seat cushion can be combined to form a flat bed, and the backrest can also form an angle less than 180° with the seat cushion to realize the ordinary sofa function.

[0052] To this end, the sofa bed comprises a structural frame, a cushion layer 1 and an elastic layer 2; the structural frame is used to support the elastic layer 2 and the cushion layer 1.

[0053] Specifically, the structural skeleton includes a left armrest 3, a right armrest 4, a bed frame, and a bed board; the bed frame includes a first bed frame 5 and a second bed frame 6 arranged in sequence along the width direction of the armrest; the first bed frame 5 is fixedly connected between the left armrest 3 and the right armrest 4; the second bed frame 6 is rotatably connected between the left armrest 3 and the right armrest 4; the bed board is respectively connected in the first bed frame 5 and the second bed frame 6.

[0054] After the above settings, the first bed frame 5 is fixed with the left armrest 3 and the right armrest 4, corresponding to the support frame of the cushion part. The second bed frame 6 can rotate relative to the left armrest 3 and the right armrest 4, thereby changing the angle between the first bed frame 5 and the second bed frame 6, corresponding to the support frame of the backrest part.

[0055] By limiting the rotational travel of the second bed frame 6, the second bed frame 6 can have a first position and a second position relative to the first bed frame 5. When the second bed frame 6 is in the first position, the angle between the first bed frame 5 and the second bed frame 6 is 180°; when the second bed frame 6 is in the second position, the angle between the first bed frame 5 and the second bed frame 6 is less than 180°.

[0056] In this embodiment, a rotational connection between the second bed frame 6 and the left armrest 3 and the right armrest 4 is achieved. The left armrest 3 and the right armrest are rotationally connected to the second bed frame 6 via a folding hinge 7 respectively; the folding hinge 7 includes a first arm 71 and a second arm 72 hingedly connected at one end; the other end of the first arm 71 is fixedly connected to the left armrest 3 or the right armrest 4, and the other end of the second arm 72 is fixedly connected to the second bed frame 6.

[0057] In this embodiment, the second bed frame 6 needs to be fixed in the second position to achieve the normal sofa function, and for this purpose, a locking mechanism is also included, which is used to fix the relative positions of the first bed frame 5 and the second bed frame 6. Specifically, the locking mechanism includes a ratchet 73 provided on one of the first arm 71 and the second arm 72, and a pawl 74 provided on the other of the first arm 71 and the second arm 72; the ratchet 73 is provided with ratchet teeth along the circumference, and the pawl 74 is engaged with the ratchet teeth to fix the second bed frame 6 at the current position.

[0058] If you want to achieve multi-level adjustment of the backrest angle, you can increase the number of ratchets, so that when the pawl 74 is engaged with different ratchets, the position of the second bed frame 6 can be changed, thereby achieving multi-level adjustment of the backrest angle.

[0059] In order to increase the stability of the entire skeleton structure, the left armrest 3 and the right armrest 4 are fixedly connected by a cross bar 8. The cross bar 8 is arranged on one side of the left armrest 3 and the right armrest 4 close to the backrest portion. A support leg 81 extends downward from the middle of the cross bar 8 along the height direction, and the support leg 81 abuts against the ground to provide a new support point.

[0060] Since the second bed frame 6 and the first bed frame 5 are in a flush state when the second bed frame 6 is in the first position, it is necessary to avoid the cross bar 8 interfering with the rotation of the second bed frame 6. Therefore, a recessed portion 82 is provided on the cross bar 8, and when the second bed frame 6 is in the first position, the portion of the second bed frame 6 that abuts against the cross bar 8 is placed in the recessed portion 82, thereby avoiding interference between the cross bar 8 and the second bed frame 6.

[0061] In this embodiment, the second bed frame 6 and the first bed frame 5 are formed by connecting two rectangular frames along the length direction. Therefore, the second bed frame 6 includes a longitudinal beam 61 in the middle in addition to the rectangular frames on all sides. Therefore, the number of the recessed portions 82 is also three, corresponding to the two sides of the rectangular frame and the position of the longitudinal beam 61.

[0062] Since the first bed frame 5 and the second bed frame 6 are only a frame and cannot support the elastic layer 2 and the cushion layer 1, a bed board needs to be installed in the first bed frame 5 and the second bed frame 6. In order to install the bed board, the first bed frame 5 and the second bed frame 6 are respectively provided with plug holes 51 and 62 for fixing the bed board along the two side frames in the length direction.

[0063] In order to ensure the stability of the bed board, the directions of the holes 51 and 62 are different, so that the bed board can be limited in both the height direction and the horizontal direction, thereby ensuring the stability of the bed board. Specifically, the inner surface of the frame on the opposite side of the first bed frame 5 and the second bed frame 6 is provided with the holes 51 and 62 at intervals; the upper surface of the frame on the opposite side of the first bed frame 5 and the second bed frame 6 is provided with the holes 51 and 62 at intervals.

[0064] Correspondingly, the bed board includes a plurality of grid-shaped bed board units 9; a latch 91 extending in the horizontal direction is provided on one side of the grid-shaped bed board unit 9, and a latch 91 extending in the height direction is provided on the other side. By inserting the latches 91 extending in different directions into the sockets 51 and 62 extending in different directions, the bed board can be stably fixed in the first bed frame 5 and the second bed frame 6.

[0065] The function of the bed board is to support the elastic layer 2. To this end, a plurality of fixing members 92 for fixing the elastic layer 2 are arranged at intervals on the surface of the grid-like bed board unit 9. The elastic layer 2 includes a plurality of elastic units 21 arranged in an array, and a fixing fitting member 210 that matches the fixing member 92 is correspondingly arranged at the bottom of each elastic unit 21. In this embodiment, the fixing member 92 is a straight protrusion extending in the height direction. The fixing fitting member 210 is a straight slot. By plugging the two together, the elastic unit 21 and the grid-like bed board unit 9 can be fixed.

[0066] In order to connect multiple elastic units 21 to form the elastic layer 2, the elastic units 21 can be quickly disassembled and assembled, and users can conveniently replace the elastic units 21. The elastic unit 21 is provided with four first connecting members 211 which are rotationally symmetrical around its own axis, and the first connecting members 211 of two adjacent elastic units are connected by an intermediate connecting member 213, and the intermediate connecting member 213 connects the first connecting members 211 of adjacent elastic units 21 together.

[0067] In this embodiment, the intermediate connection member 213 is plug-connected to the first connection member 211. The first connection member 211 is a slot, and the intermediate connection member 213 includes a connection belt and plug blocks disposed at both ends of the connection belt.

[0068] The advantage of setting up such an intermediate connecting piece 213 is that the cushion layer 1 and the elastic layer 2 can be connected together through the intermediate connecting piece 213 to avoid relative movement between the cushion layer 1 and the elastic layer 2. Therefore, a plurality of second slots 11 are arranged at circumferential intervals on the lower surface of the cushion layer 1, and the second slots 11 and the slots on the elastic unit 21 outside the elastic layer 2 can be fixedly connected together through the intermediate connecting piece 213.

[0069] Example 2

[0070] refer to Figure 19-Figure 23 In order to connect multiple elastic units 21 to form an elastic layer 2, the elastic unit 21 in this embodiment is symmetrically provided with two first connecting members 211 and two second connecting members 212 around its own axial direction; the first connecting members 211 and the second connecting members 212 are alternately arranged; in this way, two adjacent elastic units 21 are connected through the first connecting members 211 and the second connecting members 212.

[0071] In this embodiment, the first connecting member 211 and the second connecting member 212 are plug-in connections.

[0072] In order to realize the above-mentioned plug-in connection, the first connecting member 211 is an insert block, and the second connecting member 212 is a slot that cooperates with the first connecting member 211. In order to facilitate the release of the plug-in connection between multiple elastic units 21, an elastic arm 2111 is provided on the surface of the insert block, and a protrusion 2112 is provided on the surface of the elastic arm 2111; the side wall of the slot is provided with an opening 2121 that cooperates with the protrusion 2112; when the elastic arm 2111 is in the initial position, the protrusion 2112 is placed in the opening 2121 and cooperates with the opening 2121 in a direction opposite to the plug-in direction. To release the plug-in connection, just press the protrusion 2112 to release the limiting cooperation of the protrusion 2112 and the opening 2121, and the connection between the insert block and the slot can be released.

[0073] Example 3

[0074] refer to Figure 24-28The main difference between this embodiment and embodiment 2 is that the structures of the first connecting member 211 and the second connecting member 212 are different. In this embodiment, the first connecting member 211 and the second connecting member 212 are also connected by plugging, but the difference is that: an elastic arm 2111 is provided on both sides of the plug block, and the side of the elastic arm 2111 away from the plug block has a protrusion 2112; the two side walls of the slot along the length direction are respectively provided with openings 2121 that are limitedly matched with the protrusion 2112; when the elastic arm 2111 is in the initial position, the protrusion 2112 is placed in the opening 2121 and limitedly matched with the opening 2121 against the plugging direction.

[0075] When unlocking, the connection between the plug block and the slot can be released by pressing the protrusions 2112 on both sides to release the limiting cooperation between the protrusions 2112 and the openings 2121.

[0076] Example 4

[0077] refer to Figure 29-Figure 36 In this embodiment, the difference between this embodiment and embodiment 2 is that, unlike the plug connection in embodiment 1, in this embodiment, the first connector 211 and the second connector 212 are rotatably plugged. That is, in addition to being inserted into the second connector 212, the first connector 211 also needs to be rotated relative to the second connector 212 by a certain angle before the first connector 211 and the second connector 212 can form a fixed connection.

[0078] To this end, the first connecting member 211 is a rotating block extending along the height direction, and the second connecting member 212 is a limiting groove cooperating with the rotating block; the rotating block has a first position and a second position relative to the limiting groove, and when the rotating block is in the first position, the rotating block and the limiting groove are released from the limiting cooperation in the direction opposite to the direction in which the rotating block is inserted into the limiting groove; when the rotating block is in the second position, the rotating block and the limiting groove are limitedly cooperated in the direction opposite to the direction in which the rotating block is inserted into the limiting groove.

[0079] Specifically, the limiting groove is a strip groove; the length of the rotating block is less than the length of the limiting groove and greater than the width of the limiting groove. The surface of the first connecting member 211 is also provided with an operating part for driving the rotating block to rotate.

[0080] During installation, first insert the rotating block into the limiting groove from top to bottom in the height direction. At this time, the rotating block is located in the first position. Since the length of the rotating block is less than the length of the limiting groove, there is no limiting fit relationship between the rotating block and the limiting groove, and no fixed connection is formed between the first connecting member 211 and the second connecting member 212. Then, the rotating block is rotated to the second position through the operating part. At this time, the rotating block is rotated 90°. The length direction of the rotating block corresponds to the width direction of the limiting groove. Since the length of the rotating block is greater than the width of the limiting groove, the rotating block and the limiting groove are limitedly matched in the direction opposite to the insertion direction of the rotating block into the limiting groove. At this time, the first connecting member 211 and the second connecting member 212 form a fixed connection. To unlock, just rotate the rotating block to the first position again through the operating part.

[0081] Example 5

[0082] refer to Figure 37-Figure 41 The main difference between this embodiment and embodiment 1 is that, unlike the plug-in connection between the intermediate connector 213 and the first connector 211 in embodiment 4, the intermediate connector 213 and the first connector 211 in this embodiment are connected by a rotational plug-in connection.

[0083] That is to say, the intermediate connecting member 213 needs to be inserted into the first connecting member 211 first, and then rotated at a certain angle to achieve the fixed connection between the intermediate connecting member 213 and the first connecting member 211. To this end, the first connecting member 211 is an arc-shaped slot extending along the rotation direction, and the intermediate connecting member 213 includes a first part placed in the arc-shaped slot and a second part 2131 passing through the arc-shaped slot; the diameter of one end of the arc-shaped slot is larger than the second part 2131, and the diameter of the other end is smaller than the second part 2131; when the second part 2131 rotates to one end of the corresponding arc-shaped slot, the connection between the connecting member and the connecting fitting is released; when the second part 2131 rotates to the other end of the corresponding arc-shaped slot, the connecting member and the connecting fitting are limitedly matched against the direction in which the connecting member is inserted into the connecting fitting.

[0084] The advantage of this connection method is that one intermediate connection member 213 can be connected to four elastic units 21 , as long as four first parts and second parts 2131 inserted into different arc-shaped slots are provided.

[0085] Similarly, in order to facilitate the rotation operation, the intermediate connecting member 213 also includes an operating portion on the surface thereof for driving the intermediate connecting member 213 to rotate.

[0086] Example 6

[0087] refer to Figure 42-Figure 48The difference between this embodiment and embodiment 4 is that although the elastic unit 21 in this embodiment is only provided with a first connecting member 211, there is no need to provide an intermediate connecting member, and the fixed connection is achieved directly by docking the first connecting members 211 of the two elastic units 21.

[0088] To this end, the first connecting member 211 includes an inserting portion and an inserted portion extending along the circumference of the elastic unit 21; the inserting portions and the inserted portions of two adjacent elastic units 21 form a pair of insertions.

[0089] Specifically, the inserting part includes an elastic arm 2113 and a positioning card point 2114 provided on the elastic arm 2113; the inserted part is provided with a positioning groove 2115 that cooperates with the positioning card point 2114. The inserted part is provided with a clearance opening 2116 for the elastic arm 2111 to swing; the elastic arm 2111 swings along the direction of the clearance opening 2116 under the action of external force, so that the positioning card point 2114 is separated from the positioning groove 2115. Therefore, when unlocking, the user only needs to press the elastic arm 2113 to drive the positioning card point 2114 and the positioning groove 2115 to separate.

[0090] The above is only a preferred specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the utility model within the technical scope disclosed by the utility model shall be deemed to infringe the protection scope of the utility model.

Claims

1. A fixing structure of a sofa mattress layer, characterized in that The sofa bed comprises a left armrest, a right armrest, and a bed frame fixed between the left armrest and the right armrest, an elastic layer and a cushion layer are sequentially arranged on the bed frame, a plurality of first connecting members are arranged at intervals along the circumference of the elastic layer, and a plurality of second connecting members are arranged at intervals along the circumference of the lower surface of the cushion layer; the first connecting members and the second connecting members are connected by an intermediate connecting member.

2. The fixing structure of a sofa mattress layer according to claim 1, characterized in that: The first connecting member and the second connecting member are respectively slots, and the first connecting member and the second connecting member are butted against each other via an intermediate connecting member.

3. The fixing structure of a sofa mattress layer according to claim 2, characterized in that: The intermediate connecting member comprises a connecting belt and inserting blocks arranged at both ends of the connecting belt.

4. The fixing structure of a sofa mattress layer according to claim 1, characterized in that: The elastic layer comprises a plurality of elastic units arranged in an array; the elastic units are respectively provided with the first connecting members on both sides of the array in the transverse direction and the longitudinal direction; the first connecting members of two adjacent elastic units are connected via the intermediate connecting member.

5. A sofa bed, characterized in that include: A structural skeleton, a cushion layer and an elastic layer; the cushion layer and the elastic layer adopt the fixed structure described in any one of claims 1-4.

6. The sofa bed according to claim 5, characterized in that: The structural frame comprises a left armrest, a right armrest, a bed frame, and a bed board; the bed frame comprises a first bed frame and a second bed frame arranged in sequence along the width direction of the armrest; the first bed frame is fixedly connected between the left armrest and the right armrest; the second bed frame is rotatably connected between the left armrest and the right armrest; The bed board is connected to the first bed frame and the second bed frame respectively.

7. The sofa bed according to claim 6, characterized in that: The second bed frame has a first position and a second position relative to the first bed frame. When the second bed frame is at the first position, the angle between the first bed frame and the second bed frame is 180°; when the second bed frame is at the second position, the angle between the first bed frame and the second bed frame is less than 180°.

8. The sofa bed according to claim 6, characterized in that: The left armrest and the right armrest are rotatably connected to the second bed frame via a folding hinge respectively; The folding hinge includes a first arm and a second arm hingedly connected at one end; the other end of the first arm is fixedly connected to the left armrest or the right armrest, and the other end of the second arm is fixedly connected to the second bed frame.

9. The sofa bed according to claim 6, characterized in that: The left armrest and the right armrest are fixedly connected via a cross bar.

10. The sofa bed according to claim 9, characterized in that: When the second bed frame is located at the first position, a recessed portion is provided at a position of the cross bar corresponding to the position abutting against the second bed frame.

11. The sofa bed according to claim 6, characterized in that: The first bed frame and the second bed frame are respectively provided with plug holes for fixing the bed board on both side frames along the length direction.

12. The sofa bed according to claim 11, characterized in that: The inner surface of the frame on the opposite side of the first bed frame and the second bed frame is provided with the insertion holes at intervals; the upper surface of the frame on the opposite side of the first bed frame and the second bed frame is provided with the insertion holes at intervals.

13. The sofa bed according to claim 12, characterized in that: The bed board comprises a plurality of grid-shaped bed board units; a latch extending in a horizontal direction is arranged on one side of the grid-shaped bed board unit, and a latch extending in a height direction is arranged on the other side thereof.

14. The sofa bed according to claim 6, characterized in that: A plurality of fixing members for fixing the elastic layer are arranged at intervals on the surface of the bed board.

15. The sofa bed according to claim 14, characterized in that: The fixing piece is a straight-line protrusion extending along the height direction.

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