Foldable sofa bed

Abstract

The utility model discloses a foldable sofa bed, belongs to the field of sofa beds, and provides the following technical scheme for achieving the purpose: the foldable sofa bed comprises a pillow leaning part, two guardrail parts which are fixedly mounted on the pillow leaning part and are symmetrically distributed, and a foldable support frame mechanism arranged between the two guardrail parts, the folding supporting frame mechanism comprises a supporting cross rod fixedly installed between the two guardrail parts, two symmetrically-arranged supporting pieces are fixedly installed at the two ends of the supporting cross rod, and a first sofa bed plate is rotationally installed at the ends, away from the supporting cross rod, of the two supporting pieces. According to the sofa bed, the hydraulic rods support and buffer the first sofa bed plate, and when the first sofa bed plate is impacted downwards by inertia of the second sofa bed plate and the third sofa bed plate, hydraulic resistance is provided, so that the first sofa bed plate is prevented from directly impacting the supporting cross rods at the bottom of the first sofa bed plate and the guardrail parts on the side edges of the first sofa bed plate, and the harm that noise disturbs residents is reduced; the impact on the structure is reduced, and the service life of the sofa bed is prolonged.

Description

Technical Field

[0001] This application relates to the field of sofa bed technology, specifically foldable sofa beds. Background Technology

[0002] A sofa bed is a piece of furniture that can be used as both a sofa and a bed. Modern home decor emphasizes simplicity, and multifunctional furniture is increasingly becoming a popular choice, with sofa beds being one example. In small apartments, a sofa bed is essential to accommodate occasional guests.

[0003] Chinese utility model patent CN216675268U3 discloses a foldable sofa bed suitable for home use. Through optimized structural design, the foldable sofa bed offers multiple functions, easily switching between a bed and a sofa, with a simple switching process and a stable and safe structure. However, in actual use, the first support plate, as the main supporting connection end, lacks any cushioning protection. When lowering the first support plate, the inertia of the second and third support plates causes it to quickly pull down, resulting in the first support plate impacting the support frame, generating significant noise and impact force. This not only disturbs neighbors but also easily accelerates the loosening of the device's connecting parts, making it inconvenient to use.

[0004] Therefore, this application provides a foldable sofa bed to solve the above problems. Utility Model Content

[0005] This application provides a foldable sofa bed, which aims to solve the problems mentioned in the background art, such as the lack of cushioning function and the inconvenience of use of existing sofa beds.

[0006] To achieve the above objectives, this application provides the following technical solution: a foldable sofa bed, including a headrest, two symmetrically distributed guardrails fixedly installed on the headrest, and a folding support frame mechanism disposed between the two guardrails.

[0007] The folding support frame mechanism includes a support crossbar fixedly installed between two guardrail sections. Two symmetrically arranged support plates are fixedly installed at both ends of the support crossbar. A first sofa bed board is rotatably mounted on one end of each support plate away from the support crossbar. A second sofa bed board is hinged to one end of the first sofa bed board away from the support crossbar. A third sofa bed board is hinged to one end of the second sofa bed board away from the first sofa bed board. A connecting block is fixedly installed on one end of the first sofa bed board near the support plate. Hydraulic rods are rotatably installed on the connecting block and the corresponding support plate. A support part is fixedly installed on one end of the third sofa bed board away from the first sofa bed board. Thus, in use, pulling the third sofa bed board away from the headrest area unfolds the first and second sofa bed boards, flattening them into a bed shape.

[0008] Push the third sofa bed board towards the side closest to the backrest. First, lift the tail end of the third sofa bed board, causing the first and second sofa bed boards to tilt. Then, fold and retract the first and second sofa bed boards. During this process, the first, second, and third sofa bed boards will gradually fold and retract from a Z-shape to an L-shape until the walls of the first and second sofa bed boards are pressed together, and the walls of the second and third sofa bed boards are perpendicular to each other, forming a sofa shape.

[0009] During the entire adjustment process, when the first sofa bed board rotates, the hydraulic rod supports and buffers it. When the first sofa bed board is subjected to the downward impact of the inertia of the second and third sofa bed boards, it provides hydraulic resistance, thereby preventing the first sofa bed board from directly hitting its bottom support crossbar and side guardrail, reducing the harm of noise pollution, reducing the impact on the structure, and improving the service life of the sofa bed.

[0010] Preferably, to improve comfort, a mattress is laid on the first sofa bed board, the second sofa bed board, and the third sofa bed board. The mattress consists of three continuously arranged pads that are adapted to the first sofa bed board, the second sofa bed board, and the third sofa bed board. The ends of the three pads are fixedly connected in sequence to provide a better user experience.

[0011] Preferably, in order to support the movement of the third sofa bed board, the support part includes two symmetrically arranged first support rods fixedly installed at the bottom of the third sofa bed board, and two symmetrically arranged second support rods fixedly installed on one side of the two first support rods on the third sofa bed board. Each of the first and second support rods is rotatably mounted with a pulley to reduce frictional resistance and make adjustment more convenient.

[0012] Preferably, to improve aesthetics, a cover plate is fixedly installed on one side of the two first support rods on the third sofa bed board. The two ends of the cover plate are flush with the edges of the two first support rods, which can not only improve aesthetics but also protect the first and second support rods.

[0013] Preferably, in order to secure the third sofa bed board, two symmetrically arranged support protrusions are fixedly installed on the side of the guardrail away from the backrest. An S-shaped hook is fixedly installed between the first and second support protrusions on the same side of the support protrusions. The hook has a relief groove that matches the support protrusions. The hook overlaps the support protrusions, thereby preventing the third sofa bed board from sliding out when the device is in the sofa position, ensuring safety.

[0014] During the entire adjustment process, the first sofa bed board is supported and buffered by hydraulic rods when it rotates. When the first sofa bed board is subjected to the downward impact of the inertia of the second and third sofa bed boards, hydraulic resistance is provided, thereby preventing the first sofa bed board from directly hitting its bottom support crossbar and side guardrails, reducing noise pollution, reducing the impact on the structure, and improving the service life of the sofa bed.

[0015] This sofa bed, when the third sofa bed board is pulled away from the backrest, causes the first and second sofa bed boards to unfold and flatten, forming a bed shape. At this time, the support rod supports the second sofa bed board from the bottom, thereby improving the overall flatness and stability of the device. When the third sofa bed board is pushed closer to the backrest, the tail end of the third sofa bed board is first lifted, and then the first and second sofa bed boards are folded and retracted until the hooks move to the guardrail position. The third sofa bed board is then lowered, so that the clearance groove of the hooks is engaged with the support rod, completing the locking of the third sofa bed board, thereby preventing the third sofa bed board from sliding out when the device is in sofa mode, ensuring safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the foldable sofa bed in its bed configuration.

[0017] Figure 2 This is a schematic diagram of the foldable sofa bed in its sofa configuration.

[0018] Figure 3 This is a schematic diagram of the frame structure of a foldable sofa bed.

[0019] Figure 4 This is a schematic diagram of the bottom structure of a foldable sofa bed;

[0020] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a cross-sectional structural diagram of a foldable sofa bed in its bed configuration.

[0022] Figure 7 This is a cross-sectional structural diagram of a foldable sofa bed in its sofa configuration.

[0023] In the picture:

[0024] 1. Backrest; 2. Guardrail; 3. Folding support frame mechanism; 31. Support crossbar; 32. Support plate; 33. First sofa bed board; 34. Second sofa bed board; 35. Third sofa bed board; 36. Connecting block; 37. Hydraulic rod; 38. Support part; 381. First support rod; 382. Second support rod; 383. Pulley; 39. Cover plate; 310. Support protrusion rod; 311. Hook; 312. Leaving groove; 4. Mattress; 41. Cushion block. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Example 1

[0027] This embodiment provides a foldable sofa bed, such as Figure 1-7 As shown, the sofa bed includes a headrest 1, two symmetrically distributed guardrail sections 2 fixedly installed on the headrest 1, and a folding support frame mechanism 3 disposed between the two guardrail sections 2.

[0028] The folding support frame mechanism 3 includes a support crossbar 31 fixedly installed between two guardrail sections 2. Two symmetrically arranged support plates 32 are fixedly installed at both ends of the support crossbar 31. A first sofa bed board 33 is rotatably installed on the end of the two support plates 32 away from the support crossbar 31. A second sofa bed board 34 is hinged to the end of the first sofa bed board 33 away from the support crossbar 31. A third sofa bed board 35 is hinged to the end of the second sofa bed board 34 away from the first sofa bed board 33. A connecting block 36 is fixedly installed on the end of the first sofa bed board 33 near the support plate 32. A hydraulic rod 37 is rotatably installed on the connecting block 36 and the corresponding support plate 32. A support part 38 is fixedly installed on the end of the third sofa bed board 35 away from the first sofa bed board 33.

[0029] When in use, pull the third sofa bed board 35 to the side away from the pillow back 1, which will cause the first sofa bed board 33 and the second sofa bed board 34 to unfold and flatten, forming a bed shape.

[0030] Push the third sofa bed board 35 towards the side closer to the pillow back 1, first lift the tail end of the third sofa bed board 35, so that the first sofa bed board 33 and the second sofa bed board 34 are tilted, and then drive the first sofa bed board 33 and the second sofa bed board 34 to fold and retract. During the process, the first sofa bed board 33, the second sofa bed board 34 and the third sofa bed board 35 will gradually fold and retract from the Z shape to the L shape, until the walls of the first sofa bed board 33 and the second sofa bed board 34 are pressed together, and the walls of the second sofa bed board 34 and the third sofa bed board 35 are perpendicular to each other, forming a sofa shape;

[0031] During the entire adjustment process, when the first sofa bed board 33 rotates, the hydraulic rod 37 supports and buffers the first sofa bed board 33. When the first sofa bed board 33 is subjected to the downward impact of the inertia of the second sofa bed board 34 and the third sofa bed board 35, it provides hydraulic resistance, thereby preventing the first sofa bed board 33 from directly hitting its bottom support crossbar 31 and the side guardrail 2, reducing the harm of noise pollution, reducing the impact on the structure, and improving the service life of the sofa bed.

[0032] Specifically, a mattress 4 is laid on the first sofa bed board 33, the second sofa bed board 34, and the third sofa bed board 35. The mattress 4 consists of three consecutive pads 41 that are adapted to the first sofa bed board 33, the second sofa bed board 34, and the third sofa bed board 35. The ends of the three pads 41 are fixedly connected in sequence.

[0033] In use, the mattress 4 is laid on the first sofa bed board 33, the second sofa bed board 34, and the third sofa bed board 35, so that the three pads 41 are aligned with the first sofa bed board 33, the second sofa bed board 34, and the third sofa bed board 35 one by one, and the joints of the three pads 41 are aligned with the hinges of the first sofa bed board 33, the second sofa bed board 34, and the third sofa bed board 35, which makes it more convenient to rotate and provides a better user experience.

[0034] More specifically, the support part 38 includes two symmetrically arranged first support rods 381 fixedly installed at the bottom of the third sofa bed board 35, and two symmetrically arranged second support rods 382 fixedly installed on one side of the two first support rods 381 on the third sofa bed board 35. Each of the first support rods 381 and the second support rods 382 is rotatably mounted with a pulley 383.

[0035] When in use, the first support rod 381 and the second support rod 382 support the third sofa bed board 35 when adjusting the sofa bed position, and the pulley 383 helps the third sofa bed board 35 to move quickly, reducing frictional resistance and making adjustment more convenient.

[0036] Furthermore, a cover plate 39 is fixedly installed on one side of the two first support rods 381 on the third sofa bed panel 35. The two ends of the cover plate 39 are flush with the edges of the two first support rods 381. In use, the cover plate 39 surrounds the ends of the third sofa bed panel 35, which not only improves the aesthetics but also protects the first support rods 381 and the second support rods 382.

[0037] Example 2

[0038] Unlike Embodiment 1, the third sofa bed board 35 may experience instability and slippage. To address this, two symmetrically arranged support protrusions 310 are fixedly installed on the side of the guardrail 2 away from the headrest 1. An S-shaped hook 311 is fixedly installed between the first support rod 381 and the second support rod 382 on the same side of the support protrusions 310. The hook 311 has a relief groove 312 that matches the support protrusions 310, and the hook 311 overlaps the support protrusions 310.

[0039] In use, pull the third sofa bed board 35 away from the backrest 1, causing the first sofa bed board 33 and the second sofa bed board 34 to unfold and flatten, forming a bed shape. At this time, the support rod 310 supports the second sofa bed board 34 from the bottom, thereby improving the overall flatness and stability of the equipment. When pushing the third sofa bed board 35 closer to the backrest 1, first lift the tail end of the third sofa bed board 35, and then drive the first sofa bed board 33 and the second sofa bed board 34 to fold and retract until the hook 311 moves to the position of the guardrail 2. Then lower the third sofa bed board 35 so that the clearance groove 312 of the hook 311 is engaged with the support rod 310, thus locking the third sofa bed board 35 and preventing the third sofa bed board 35 from sliding out when the equipment is in the sofa position, ensuring safety.

[0040] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A foldable sofa bed, comprising a headrest (1), two symmetrically distributed guardrails (2) fixedly installed on the headrest (1), and a folding support frame mechanism (3) disposed between the two guardrails (2), characterized in that: The folding support frame mechanism (3) includes a support crossbar (31) fixedly installed between two guardrail sections (2). Two symmetrically arranged support plates (32) are fixedly installed at both ends of the support crossbar (31). A first sofa bed board (33) is rotatably installed on one end of the two support plates (32) away from the support crossbar (31). A second sofa bed board (34) is hinged to one end of the first sofa bed board (33) away from the support crossbar (31). A third sofa bed board (35) is hinged to one end of the second sofa bed board (34) away from the first sofa bed board (33). A connecting block (36) is fixedly installed on one end of the first sofa bed board (33) near the support plate (32). A hydraulic rod (37) is rotatably installed on the connecting block (36) and the corresponding support plate (32). A support part (38) is fixedly installed on one end of the third sofa bed board (35) away from the first sofa bed board (33).

2. The foldable sofa bed according to claim 1, characterized in that: A mattress (4) is laid on the first sofa bed board (33), the second sofa bed board (34) and the third sofa bed board (35). The mattress (4) consists of three consecutive pads (41) that are adapted to the first sofa bed board (33), the second sofa bed board (34) and the third sofa bed board (35). The ends of the three pads (41) are fixedly connected in sequence.

3. The foldable sofa bed according to claim 1, characterized in that: The support part (38) includes two symmetrically arranged first support rods (381) fixedly installed at the bottom of the third sofa bed board (35). Two symmetrically arranged second support rods (382) are also fixedly installed on one side of the two first support rods (381) on the third sofa bed board (35). Each of the first support rods (381) and the second support rods (382) is rotatably mounted with a pulley (383).

4. The foldable sofa bed according to claim 3, characterized in that: A cover plate (39) is fixedly installed on one side of the two first support rods (381) on the third sofa bed board (35), and the two ends of the cover plate (39) are flush with the edges of the two first support rods (381).

5. The foldable sofa bed according to claim 3, characterized in that: Two symmetrically arranged support protrusions (310) are fixedly installed on the side of the guardrail (2) away from the pillow back (1). An S-shaped hook (311) is fixedly installed between the first support rod (381) and the second support rod (382) on the same side of the support protrusion (310). The hook (311) has a relief groove (312) that is adapted to the support protrusion (310). The hook (311) overlaps the support protrusion (310).

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