A sofa bed with a guide component

Abstract

This utility model relates to a sofa bed with a guiding component. Existing sofa beds have complex backrest structures. This utility model includes a backrest and armrests on both sides of the backrest. The backrest is movably mounted between the rear edges of the armrests via a guiding component. The guiding component includes a sliding part, a swinging part, and a linkage plate fixed to the side wall of the backrest. The two ends of the linkage plate are connected to the armrests via the sliding part and the swinging part, respectively, allowing the two ends of the linkage plate to move along a preset path and drive the backrest to switch between a vertical sitting position and a horizontal reclining position. Guided by the sliding part and the swinging part, the linkage plate drives the backrest to move, thereby enabling the backrest to switch between sitting and reclining positions. This simplifies the structure, facilitates switching, reduces costs, facilitates disassembly and maintenance, allows for wall-mounted installation, reduces floor space, and improves the user experience.

Description

Technical Field

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

[0002] Existing sofa beds include a base, armrests, and a backrest. The armrests are located on both sides of the base, and the backrest is located at the rear edge of the base. A movable platform is provided within the base. The movable platform and the backrest cooperate to allow the sofa bed to switch between a sitting and reclining position. When the sofa bed is in the sitting position, the backrest is upright, and the backrest and movable platform work together to provide support for the user. When the sofa bed is in the reclining position, the backrest tilts down and cooperates with the movable platform to provide a comfortable reclining experience. The existing backrest assembly structure needs to balance positioning stability and ease of movement, resulting in a complex structure. This increases assembly and maintenance difficulty, hinders switching, increases production costs, and negatively impacts the user experience.

[0003] In addition, when the existing backrest switches from a seated to a reclining position, space needs to be reserved behind the sofa bed for it to swing, which makes it impossible for the sofa bed to be placed flush against the wall. This can easily cause the backrest to rub against the wall, resulting in wear and tear. In addition, the space required between the sofa bed and the wall increases the area occupied by the sofa bed and affects the user experience. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sofa bed with a guide component. The backrest is mounted on the corresponding armrests on both sides via the guide component. The linkage plate drives the backrest to move under the guidance of the sliding part and the swinging part, thereby enabling the backrest to switch between a sitting position and a lying position. This simplifies the structure, facilitates switching between positions, reduces costs, facilitates disassembly and maintenance, and allows for wall-mounted installation, reducing floor space and improving the user experience.

[0005] This utility model is achieved through the following method: a sofa bed with a guiding component, a backrest, and armrests on both sides of the backrest. The backrest is movably mounted between the rear edges of the armrests via the guiding component. The guiding component includes a sliding part, a swinging part, and a linkage plate fixed to the side wall of the backrest. The two ends of the linkage plate are respectively connected to the armrests via the sliding part and the swinging part, so that the two ends of the linkage plate can move along a preset path and drive the backrest to switch between a vertical sitting position and a horizontal reclining position. The two sides of the backrest are mounted on the corresponding armrests via the guiding component. The linkage plate drives the backrest to move under the guidance of the sliding part and the swinging part, thereby enabling the backrest to switch between sitting and reclining positions. This effectively simplifies the structure, facilitates user switching of the backrest, reduces costs, facilitates disassembly and maintenance, and can be installed flush against the wall without reserving space for the backrest, effectively reducing the floor space and improving the user experience.

[0006] Preferably, the sliding part includes a slide rail fixed to the armrest and a sliding member disposed at the end of the linkage plate. The sliding member moves linearly back and forth along the slide rail. The corresponding end of the linkage plate slides along the slide rail via the sliding member, so that the bottom end of the backrest can move along the laying path of the slide rail and ensure that the backrest is switched.

[0007] Preferably, the swinging part includes a swing rod, the movable end and the fixed end of which are rotatably connected to the linkage plate and the armrest, respectively. The swing rod guides the movable end to reciprocate along an arc with its fixed end as the center. The corresponding end of the linkage plate swings with the fixed end of the swing rod as the center, so that the top part of the backrest can swing along an arc path and ensure that the backrest can complete the switching.

[0008] Preferably, the fixed end of the swing arm is located on the side wall of the armrest in the area behind the slide rail. The swing arm and the slide rail are staggered, which ensures that the swing arm has swing space and also ensures that the top part of the backrest is accurately displaced and that the backrest can be accurately switched between a sitting position and a lying position.

[0009] Preferably, the slide rail is fixed to the armrest in a forward-lower-backward-high configuration. When the backrest is in a seated position, the sliding member is located at the front of the bottom edge of the linkage plate, and the movable end of the swing arm is connected to the rear of the top edge of the linkage plate. The sliding part and the swinging part cooperate to guide the two ends of the linkage plate to move along different paths, so that the top and bottom ends of the backrest can move to specific positions when switching between a seated and a reclining position, ensuring precise backrest movement.

[0010] Preferably, the bottom of the backrest moves from back to front along the slide rail, and the top of the backrest swings from top to bottom around the fixed end, allowing the backrest to switch from a vertically positioned sitting position to a horizontally positioned lying position. By guiding the top and bottom ends of the backrest respectively, the posture of the backrest can be adjusted, thereby enabling free switching between a sitting and lying position.

[0011] Preferably, a base is provided between the armrests, and the top surface of the base forms a limiting platform. When the backrest is switched to a reclining position, it rests on the limiting platform from top to bottom to limit the backrest from collapsing under pressure. The limiting platform supports the backrest, ensuring that the backrest is stably positioned in the bed position, effectively bearing the user's weight, preventing the backrest from shifting downwards and collapsing due to pressure, and ensuring reliable support.

[0012] Preferably, the backrest has a limiting protrusion on its side wall and a limiting stop on its armrest. When the backrest is switched to a seated position, it is stopped by the limiting protrusion and the limiting stop, thus limiting the backrest from shifting backward under force. The limiting stop is located on the movement path of the limiting protrusion, so that the limiting protrusion moves synchronously with the backrest and contacts the limiting stop when switched to a seated position. The limiting stop acts as a locking and positioning device for the limiting protrusion, preventing the backrest from moving excessively backward and ensuring that the backrest remains in an upright seated position.

[0013] Preferably, a vertical backplate is provided between the rear edges of the armrest. When the backrest is switched to a seated position, it abuts against the backplate from front to back to limit the backrest from shifting backward under force. The backplate is located behind the backrest. When the backrest is switched to a seated position, it abuts against the backplate through the rear wall. The backplate not only acts as abutment and limiter for the backrest, preventing excessive backward movement and ensuring that the backrest remains in a vertical seated position, but also serves to isolate the backrest from the wall.

[0014] Preferably, the front wall of the backrest is provided with a backrest cushion. When the backrest is switched to a reclining position, the backrest cushion moves with the backrest and faces upwards. The backrest cushion is flush with the top surface of the worktable and is used to form a support surface for the user to lie down, providing comfortable support for the user.

[0015] Preferably, the guide components are in two sets and symmetrically arranged on both sides of the backrest, so that both sides of the backrest are subjected to force and move together, which not only ensures that both sides of the backrest can be effectively guided, but also ensures that both sides of the backrest have good connection strength, preventing the backrest from tilting laterally due to force on one side.

[0016] Preferably, the base includes a retractable platform that can extend and retract forward and backward. Below the platform is a retractable support section that can also extend and retract forward and backward. The support section can switch between a flush support state with the top surface of the platform and a concealed state hidden beneath the platform. When the backrest is in a seated position, the support section can be switched to a concealed state and stored under the platform, allowing the sofa bed to function as a sofa. When the backrest is in a reclining position, it can move forward and raise to the support state, ensuring that the top surfaces of the backrest, platform, and support section are all at the same height and fit together to form a flat support surface, effectively improving user comfort.

[0017] The beneficial effects of this utility model are as follows: The backrest is installed on the corresponding armrests on both sides through the guide components. The linkage plate drives the backrest to move under the guidance of the sliding part and the swinging part, thereby enabling the backrest to switch between sitting and reclining positions. This effectively simplifies the structure, making it convenient for users to switch backrests, reducing costs, facilitating disassembly and maintenance, and allowing it to be installed flush against the wall without needing to reserve space for the backrest, effectively reducing the floor space occupied and improving the user experience. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure when the backrest is in a seated position.

[0019] Figure 2 This is a schematic diagram of the assembly structure when the backrest is in a reclining position.

[0020] Figure 3 This is a schematic diagram of the disassembled structure of the sofa bed;

[0021] Figure 4 This is a partial disassembly diagram of the sofa bed;

[0022] Figure 5 This is a structural diagram of the sofa bed in a reclining position.

[0023] Figure 6 This is a structural diagram of the sofa bed in a seated position.

[0024] In the diagram: 1. Backrest, 2. Armrest, 3. Linkage plate, 4. Slide rail, 5. Sliding component, 6. Swing rod, 7. Support, 8. Movable platform, 9. Base, 10. Limiting platform, 11. Limiting protrusion, 12. Back panel, 13. Limiting baffle. Detailed Implementation

[0025] The essential features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 and 2 A sofa bed with a guiding assembly is shown, including a backrest 1 and armrests 2 on both sides of the backrest 1. The backrest 1 is movably mounted between the rear edges of the armrests 2 via the guiding assembly. The guiding assembly includes a sliding part, a swinging part, and a linkage plate 3 fixed to the side wall of the backrest 1. The two ends of the linkage plate 3 are connected to the armrests 2 via the sliding part and the swinging part, respectively, so that the two ends of the linkage plate 3 can move along a preset path and drive the backrest 1 to switch between a vertical sitting position and a horizontal reclining position. The backrest 1 is mounted on the corresponding armrests 2 on both sides via the guiding assembly. The linkage plate 3 drives the backrest 1 to move under the guidance of the sliding part and the swinging part, thereby enabling the backrest 1 to switch between sitting and reclining positions. This effectively simplifies the structure, facilitates user switching of the backrest 1, reduces costs, facilitates disassembly and maintenance, and can be mounted flush against the wall via the rear wall, eliminating the need to reserve space for the backrest 1 to move, effectively reducing the floor space and improving the user experience.

[0027] In actual operation, the two ends of the linkage plate 3 can move along a preset path via the sliding part and the swinging part, respectively, driving the backrest 1 to switch between a vertical sitting position and a horizontal reclining position. The linkage plate 3 is fixed to the wall of the backrest 1 by fasteners so that the two can move synchronously. The sliding part includes a slide rail 4 fixed to the armrest 2 and a sliding member 5 set at the end of the linkage plate 3. The slide rail 4 is inclined at the front and lower at the back, and the sliding member 5 moves linearly back and forth along the slide rail 4. The swinging part includes a swing rod 6. The movable end and the fixed end of the swing rod 6 are rotatably connected to the linkage plate 3 and the armrest 2, respectively. The swing rod 6 guides the movable end to move back and forth along an arc with its fixed end as the center.

[0028] When the backrest 1 is in a vertical sitting position, the linkage plate 3 is also vertically set, and the backrest forms a forward-facing exposed support surface. At this time, the bottom end of the linkage plate 3 is connected to the rear end of the slide rail 4 through the sliding member 5, and the movable end of the swing rod 6 is rotatably connected to the top end of the linkage plate 3.

[0029] When the backrest 1 switches from a sitting position to a reclining position, the linkage plate 3 changes from a vertical position to a horizontal position. During this process, the bottom end of the linkage plate 3 slides forward along the slide rail 4 via the slider 5, allowing the top end of the linkage plate 3 to have space to drop downwards and swing downwards around the fixed end of the swing rod 6. The height difference between the top and bottom ends of the linkage plate 3 gradually decreases and disappears. The bottom of the backrest 1 moves from back to front along the slide rail 4, and the top of the backrest 1 swings downwards around the fixed end, thus switching the backrest 1 from a vertical sitting position to a horizontal reclining position. The top of the backrest 1 can drop vertically downwards, eliminating the need to reserve space behind the sofa bed and ensuring that the sofa bed can be installed flush against the wall. After the switch is complete, the bottom end of the linkage plate 3 becomes the front end, and the top end becomes the rear end, thus switching the posture of the backrest 1 from a vertical sitting position to a horizontal reclining position. When the backrest 1 switches from a reclining position to a sitting position, the sliding member 5 slides obliquely backward along the slide rail 4, and the movable end of the swing arm 6 swings upward, thereby completing the posture switch of the backrest 1.

[0030] When the backrest 1 is in a horizontally positioned reclining position, the linkage plate 3 is also horizontally positioned, and the backrest forms an upward-facing exposed support surface. At this time, the front end of the linkage plate 3 is connected to the front end of the slide rail 4 via rollers, and the rear end of the linkage plate 3 is connected to the armrest 2 via a swing rod 6, ensuring that the backrest 1, which is fixed to the linkage plate 3, is reliably positioned in the reclining position.

[0031] In actual operation, the fixed end of the swing arm 6 is located on the side wall of the armrest 2 in the area behind the slide rail 4, ensuring that the swing arm 6 and the slide rail 4 can guide the corresponding end of the linkage plate 3 to move along the preset path, thereby ensuring that the backrest 1 can accurately switch between the reclining position and the sitting position, and preventing interference between the two due to the close proximity of the two.

[0032] In actual operation, the slide rail 4 is fixed to the armrest 2 with a lower front and higher rear posture. When the backrest 1 is in a sitting position, the sliding member 5 is located at the front of the bottom edge of the linkage plate 3, and the movable end of the swing rod 6 is connected to the rear of the top edge of the linkage plate 3. The sliding member 5 and the movable end of the swing rod 6 are respectively set at opposite corners of the linkage plate 3. By increasing the distance between the sliding member 5 and the movable end of the swing rod 6, the posture adjustment accuracy of the linkage plate 3 is improved, thereby ensuring that the backrest 1 is accurately switched.

[0033] In actual operation, the front wall of the backrest 1 is equipped with a backrest cushion. When the backrest 1 is switched to a reclining position, the backrest cushion moves in tandem with the backrest 1 and faces upwards. The backrest cushion moves synchronously with the backrest 1 and performs different functions. When the backrest 1 is in a sitting position, the backrest cushion faces forward and forms a support surface, allowing the user to sit on the movable platform 8 and lean against the support surface. When the backrest 1 is in a reclining position, the backrest 1 faces upwards and forms a support surface with the top surface of the movable platform 8, allowing the user to lie down.

[0034] In actual operation, the guide components are in two sets and symmetrically arranged on both sides of the backrest 1, so that both sides of the backrest 1 are subjected to force and move together synchronously. The two sets of guide components are symmetrically arranged, and symmetrical linkage plates 3 are fixed to both side walls of the backrest 1. Each linkage plate 3 is fixed to the backrest 1 and realizes the posture switching of the backrest 1 under the guidance of the corresponding sliding part and swinging part, preventing the backrest 1 from twisting and jamming due to asynchronous movement of the linkage part, and ensuring that the backrest 1 can be smoothly switched between sitting and lying positions.

[0035] In actual operation, the base 9 is equipped with a retractable platform 8, and below the platform 8 is a retractable support 7. The support 7 can switch between a support state flush with the top surface of the platform 8 and a hidden state concealed below the platform 8 (e.g., ...). Figure 3 (As shown). When the sofa bed needs to be switched to a sitting position, the backrest 1 is switched to the sitting position, and the front side wall of the backrest 1 forms a backrest surface. The support part 7 is switched to a hidden state and hidden under the movable table 8 (as shown). Figure 6(As shown), so that the top surface of the movable platform 8 forms a shorter support surface for the user, using the backrest and support surface to improve sitting comfort. When the sofa bed needs to be switched to a reclining position, the backrest 1 is switched to the reclining position, and the support part 7 moves forward out of the movable platform 8 and switches to the support position, so that the top surfaces of the backrest 1, the movable platform 8, and the support part 7 are flush and connected to form a support surface for the user to lie on (as shown). Figure 5 (As shown), to improve lying comfort.

[0036] In actual operation, a base 9 is provided between the armrests 2, and a limiting platform 10 is formed on the top surface of the base. When the backrest 1 is switched to a reclining position, it rests on the limiting platform 10 from top to bottom to limit the backrest 1 from collapsing under force. The limiting platform 10 is used to support the backrest 1, ensuring that the backrest 1 is stably positioned in the bed position, effectively bearing the user's weight, preventing the backrest 1 from shifting downward and collapsing due to force, and ensuring reliable support.

[0037] In actual operation, the side wall of the backrest 1 is provided with a limiting protrusion 11, and the armrest 2 is provided with a limiting baffle 13 (e.g., Figure 4 As shown, when the backrest 1 is switched to a seated position, it is limited by the limiting protrusion 11 and the limiting baffle 13 to restrict the backrest 1 from shifting backward under force. The limiting baffle 13 is located on the movement path of the limiting protrusion 11, so that the limiting protrusion 11 moves synchronously with the backrest 1 and abuts against the limiting baffle 13 when switched to a seated position. The limiting baffle 13 acts to lock and position the limiting protrusion 11, preventing the backrest 1 from moving excessively backward and ensuring that the backrest 1 remains in an upright seated position. The armrest 2 and the corresponding side wall of the backrest 1 are both provided with limiting baffles 13 and limiting protrusions 11 to ensure that both sides of the backrest 1 can be effectively limited.

[0038] Furthermore, the backrest 1 can also be positioned in a seated work position via the back panel 12, which should also be considered a specific embodiment of this utility model. Specifically, a vertically placed back panel 12 is provided between the rear edges of the armrest 2. When the backrest 1 is switched to a seated work position, it abuts against the back panel 12 from front to back to limit the backrest 1 from shifting backward under force. The back panel 12 is located behind the backrest 1. When the backrest 1 is switched to a seated work position, it abuts against the back panel 12 through the rear wall. The back panel 12 not only acts as abutment and limit for the backrest 1, preventing excessive backward movement and ensuring that the backrest 1 remains in a vertical seated work position, but also serves to isolate the backrest 1 from the wall.

[0039] In actual operation, the armrest 2 and the base 9 are independent components that can be connected by fasteners, with the armrest 2 fixedly attached to both sides of the base 9. Furthermore, the base 9 can also be a component of the armrest 2, meaning that the function of the base 9 is achieved by an equivalent structure located at a corresponding position on the armrest 2; all of these should be considered specific embodiments of this utility model.

Claims

1. A sofa bed with a guide assembly, comprising a backrest (1) and armrests (2) arranged on both sides of the backrest (1), characterized in that, The backrest (1) is movably mounted between the rear edges of the armrest (2) via a guide assembly. The guide assembly includes a sliding part, a swinging part, and a linkage plate (3) fixed to the side wall of the backrest (1). The two ends of the linkage plate (3) are connected to the armrest (2) via the sliding part and the swinging part, respectively, so that the two ends of the linkage plate (3) can move along a preset path and drive the backrest (1) to switch between a vertical sitting position and a horizontal lying position.

2. The sofa bed with a guide assembly according to claim 1, characterized in that, The sliding part includes a slide rail (4) fixed to the handrail (2) and a sliding member (5) provided at the end of the linkage plate (3). The sliding member (5) moves linearly back and forth along the slide rail (4).

3. The sofa bed with a guide assembly according to claim 2, characterized in that, The swinging part includes a swing rod (6), the movable end and the fixed end of the swing rod (6) are rotatably connected to the linkage plate (3) and the handrail (2) respectively, and the swing rod (6) guides the movable end to reciprocate along the arc with its fixed end as the center.

4. The sofa bed with a guide assembly according to claim 3, characterized in that, The fixed end of the swing arm (6) is located on the side wall of the handrail (2) in the area behind the slide rail (4).

5. The sofa bed with a guide assembly according to claim 3, characterized in that, The slide rail (4) is fixed to the armrest (2) in a low-to-high posture. When the backrest (1) is in a sitting position, the sliding member (5) is located at the front of the bottom edge of the linkage plate (3), and the movable end of the swing rod (6) is connected to the rear of the top edge of the linkage plate (3).

6. The sofa bed with a guide assembly according to claim 2, characterized in that, The bottom of the backrest (1) moves from back to front along the slide rail (4), and the top of the backrest (1) swings from top to bottom with the fixed end as the center, so that the backrest (1) switches from a vertical sitting position to a horizontal lying position.

7. A sofa bed with a guide assembly according to claim 6, characterized in that, The backrest (1) has a cushion on its front wall. When the backrest (1) is switched to a reclining position, the cushion moves with the backrest (1) and is exposed upwards.

8. The sofa bed with a guide assembly according to claim 1, characterized in that, The backrest (1) has a limiting protrusion (11) on its side wall and a limiting baffle (13) on its upper armrest (2). When the backrest (1) is switched to a sitting position, it is stopped by the limiting protrusion (11) and the limiting baffle (13) to limit the force on the backrest (1) to shift backward. Alternatively, a vertical back plate (12) is provided between the rear edges of the armrest (2). When the backrest (1) is switched to a sitting position, it abuts against the back plate (12) from front to back to limit the force on the backrest (1) to shift backward. Alternatively, the guide assembly consists of two sets and is symmetrically arranged on both sides of the backrest (1) so that both sides of the backrest (1) are simultaneously subjected to force and move together.

9. A sofa bed with a guide assembly according to any one of claims 1-8, characterized in that, A base (9) is provided between the armrests (2), and a limiting platform (10) is formed on the top surface of the base (9). When the backrest (1) is switched to the reclining position, it rests on the limiting platform (10) from top to bottom to limit the backrest (1) from collapsing under force.

10. The sofa bed with a guide assembly according to claim 9, characterized in that, The base (9) is provided with a movable platform (8) that can extend and retract in the front and back. Below the movable platform (8) is a support part (7) that can extend and retract in the front and back. The support part (7) can switch between a support state that is flush with the top surface of the movable platform (8) and a hidden state that is hidden under the movable platform (8).

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