A sofa bed that can be turned over and unfolded

Abstract

The utility model discloses a sofa bed of overturning and unfolding relates to sofa bed relevant field, to solve the frame folding state of sofa bed in prior art is all located cushion position lower extreme, need to set backrest portion additionally, and Z -shaped folding mode makes sofa bed length of unfolding and the problem of sofa's sitting depth association big. The sofa bed frame is constituted by first bed frame, second bed frame and third bed frame, and second bed frame and third bed frame are located rear end and set up in vertical direction under the contraction state, first bed frame includes horizontal support frame, the both sides fixed with rear extension portion in the rear end of horizontal support frame, the inside left and right of rear extension portion is fixed with intermediate action lever, and the front end of second bed frame is fixed with front extension portion along the inside of rear extension portion, and front extension portion is located intermediate action lever outside and is rotatably connected with intermediate action lever, third bed frame includes upper support frame and lower support frame, and upper support frame is rotatably connected through hinge with second bed frame.

Description

Technical Field

[0001] This utility model relates to the field of sofa beds, specifically a sofa bed that can be flipped and unfolded. Background Technology

[0002] As a type of furniture that combines sitting and reclining functions, sofa beds are increasingly valued due to the rapid pace of urbanization and the growing compactness of living spaces, leading to higher demands for the multifunctionality and space utilization of furniture.

[0003] Traditional sofa beds with fixed frames are difficult to adapt to the needs of different apartment layouts, especially in small apartments where users want furniture that can quickly transform within limited space while maintaining ease of use. For example, Chinese patent CN 213487953 U (A Flip-Up Sofa Bed) describes a design that includes a movable base and armrest components. Along the stretching direction, a first frame, a second frame, and a third frame are provided between the movable base and the armrest components. The first frame is located at the top of the movable base. One end of the second frame is hinged to the movable base, and the other end of the second frame, away from the movable base, is hinged to the third frame. Both sides of the third frame are hinged to the armrest components. In the folded state, the second frame flips and folds under the third frame, with the second and third frames stacked on top of the first frame. In the unfolded state, the second and third frames are flipped upwards while the movable base is pulled out until the second and third frames are laid flat at the same height as the first frame. This flip-up and folding design of the second and third frames allows the sofa bed to be easily unfolded without the need for strenuous pulling, making it lighter, easier to use, and providing a better unfolding effect.

[0004] While the aforementioned existing technologies have the function of flipping and unfolding sofa beds, the frame of the sofa bed is located at the bottom of the seat when folded, requiring a separate backrest. Furthermore, the Z-shaped folding method makes the unfolded length of the sofa bed highly dependent on the seat depth of the sofa. A smaller seat depth results in a shorter sofa bed, while a longer sofa bed results in a greater seat depth. Utility Model Content

[0005] The purpose of this utility model is to provide a flip-up and unfoldable sofa bed to solve the problems mentioned in the background art, where the frame of the sofa bed is located at the lower end of the seat cushion when folded, requiring a separate backrest, and the Z-shaped folding method makes the unfolded length of the sofa bed highly correlated with the seat depth of the sofa.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flip-up and unfoldable sofa bed, comprising a sofa bed frame, the sofa bed frame being composed of a first bed frame, a second bed frame, and a third bed frame, the first bed frame, the second bed frame, and the third bed frame being arranged from front to back, the second bed frame and the third bed frame being located at the rear end and vertically arranged in the retracted state, the first bed frame including a horizontal support frame, the horizontal support frame being horizontally arranged; the rear ends of the horizontal support frame having rear extensions fixed on both sides, the rear extensions having a central actuating rod fixedly arranged through them on the left and right sides, the front end of the second bed frame having a front extension fixed along the inner side of the rear extensions, the front extensions being located outside the central actuating rod and rotatably connected to the central actuating rod; the third bed frame including an upper support frame and a lower support frame, the upper support frame and the lower support frame being fixedly connected, the upper support frame being rotatably connected to the second bed frame via a hinge.

[0007] Preferably, the sofa bed frame is provided with side fixing frames on both sides, and the inner side of the side fixing frame is provided with an outer limiting groove along the sliding path of the middle moving rod. The outer side of the side fixing frame is provided with an armrest seat, and the side fixing frame is embedded in the inner side of the armrest seat.

[0008] Preferably, an inner limiting groove is provided on the outer side of the outer limiting groove along the inner edge of the side fixing frame. The inner limiting groove is connected to the outer limiting groove. Both ends of the intermediate actuating rod pass through the outer limiting groove and extend into the inner limiting groove, where a limiting plate is fixed.

[0009] Preferably, the upper support frame and the lower support frame are connected by a rotating shaft that passes through them on both sides. The rear end of the inner side of the side fixing frame is provided with a round hole along the rear end of the outer limiting groove. The other end of the rotating shaft extends into the round hole on the inner side of the side fixing frame and is rotatably connected to the side fixing frame.

[0010] Preferably, a rear limiting support plate is fixed at the lower end of the two side fixing frames along the rear end of the outer limiting slide groove. The third bed frame is in contact with the upper surface of the rear limiting support plate when it is unfolded. A lower support plate is fixed at the lower end of the rear limiting support plate.

[0011] Preferably, a C-shaped fixing seat is fixed at the lower end inside the lower support plate, and a driving hydraulic rod is rotatably connected to the C-shaped fixing seat via a shaft. A fixing sleeve is fixed at the output rod end of the driving hydraulic rod. The fixing sleeve is fitted onto the outside of the intermediate actuating rod at the position between the two front extensions, and the fixing sleeve is rotatably connected to the intermediate actuating rod.

[0012] Preferably, a vertical baffle is integrally connected to the front end of the horizontal support frame, and a horizontal fixing plate is integrally connected to the lower end of the rear end of the vertical baffle. Multiple movable rollers are installed in a left-right array at the lower end of the horizontal fixing plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, the first bed frame, the second bed frame and the third bed frame are arranged from front to back. The second bed frame and the third bed frame are located at the rear end and arranged vertically in the retracted state, so that the second bed frame and the third bed frame serve as the backrest structure and the first bed frame serves as the sitting support structure. There is no need to set the backrest, which simplifies the composition structure of the sofa bed and reduces the weight of the sofa bed.

[0015] (2) In this utility model, the lower support frame is vertically set at the lower end of the entire structure when the sofa is in the form of a sofa. It does not occupy the length of the side fixing frame occupied by the horizontal unfolding, so the length of the side fixing frame is small and will not increase the area occupied by the sofa too much. However, after the sofa bed is unfolded, the horizontal support frame, the second bed frame, the upper support frame and the lower support frame together form the reclining part of the sofa bed. So, when the horizontal support frame is the standard size of the main structure that affects the seat depth of the sofa, the length of the sofa bed can be large and is not affected by the seat depth. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a flip-up and unfoldable sofa bed according to the present invention.

[0017] Figure 2 This is a top view of a flip-up and unfoldable sofa bed according to the present invention;

[0018] Figure 3 This is a cross-sectional view at point AA of a sofa bed that can be flipped and unfolded according to this utility model;

[0019] Figure 4 This is a schematic diagram of the upward-facing structure of a flip-up sofa bed of this utility model after removing the armrests;

[0020] Figure 5 This is a schematic diagram of the structure of a sofa bed frame for a flip-up and unfoldable sofa bed according to the present invention.

[0021] In the diagram: 1. Armrest seat; 2. Side fixing frame; 3. Inner limiting slide groove; 4. Outer limiting slide groove; 5. Rear limiting support plate; 6. Lower support plate; 7. Sofa bed frame; 8. First bed frame; 9. Horizontal support frame; 10. Vertical baffle; 11. Horizontal fixing plate; 12. Moving roller; 13. Rear extension; 14. Middle action rod; 15. Limiting plate; 16. Second bed frame; 17. Front extension; 18. Third bed frame; 19. Upper support frame; 20. Lower support frame; 21. Flipping pivot; 22. C-shaped fixing seat; 23. Drive hydraulic rod; 24. Fixing sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1-5 One embodiment of this utility model is a flip-up sofa bed, which includes an armrest seat 1, a side fixing frame 2 embedded in the inner side of the armrest seat 1, and a sofa bed frame 7 arranged between the two side fixing frames 2.

[0024] The sofa bed frame 7 consists of a first bed frame 8, a second bed frame 16, and a third bed frame 18, arranged sequentially from front to back. In the retracted state, the second bed frame 16 and the third bed frame 18 are located at the rear end and are vertically oriented. The first bed frame 8 has a horizontal support frame 9, which is horizontally positioned and provides a stable support base for the reclining portion of the sofa bed when unfolded. Rear extensions 13 are fixed to both sides of the rear end of the horizontal support frame 9, and a central actuating rod 14 is fixedly fixed through the rear extensions 13 from left to right. The front end of the second bed frame 16 is fixed to a front extension 17 along the inner side of the rear extension 13. The front extension 17 is located outside the central actuating rod 14 and is rotatably connected to it. This rotatable connection allows the second bed frame 16 to rotate flexibly relative to the first bed frame 8 during the unfolding and folding of the sofa bed. The third bed frame 18 includes an upper support frame 19 and a lower support frame 20, which are fixedly connected. The upper support frame 19 is also hinged to the second bed frame 16. This hinged connection allows the third bed frame 18 to rotate in sync with the movement of the second bed frame 16, enabling the sofa bed to unfold and fold as a whole. A vertical baffle 10 is integrally connected to the front end of the horizontal support frame 9, and a horizontal fixing plate 11 is integrally connected to the lower rear end of the vertical baffle 10. Multiple casters 12 are arranged in a left-right array at the lower end of the horizontal fixing plate 11. These casters 12 allow the sofa bed to slide easily when needed, reducing resistance during movement.

[0025] An outer limiting groove 4 is formed on the inner side of the side fixing frame 2 along the sliding path of the intermediate actuating rod 14. The outer limiting groove 4 provides a path for the sliding of the intermediate actuating rod 14, ensuring the stability of the intermediate actuating rod 14 during the sliding process and avoiding deviation or wobbling, thereby ensuring the accuracy of the sofa bed's unfolding and folding actions. An inner limiting groove 3 is formed on the outer side of the outer limiting groove 4 of the side fixing frame 2. The inner limiting groove 3 communicates with the outer limiting groove 4. Both ends of the intermediate actuating rod 14 pass through the outer limiting groove 4 and extend into the inner limiting groove 3, where they are fixed with limiting plates 15. The cooperation of the inner limiting groove 3, the outer limiting groove 4, and the limiting plates 15 further restricts the sliding range of the intermediate actuating rod 14, preventing it from deviating from the predetermined track during the sliding process, and enhancing the stability and reliability of the entire sofa bed structure.

[0026] A rotating pivot 21 is fixedly fixed through the upper support frame 19 and the lower support frame 20 on both sides. A round hole is opened at the rear end of the inner side of the side fixing frame 2 along the rear end of the outer limiting slide groove 4. The other end of the rotating pivot 21 extends into the round hole on the inner side of the side fixing frame 2 and is rotatably connected to the side fixing frame 2. The rotating pivot 21 allows the third bed frame 18 to rotate flexibly with it as the pivot. When the sofa bed is unfolded, the third bed frame 18 can be smoothly flattened to form a comfortable lying surface; when folded, the third bed frame 18 can be accurately returned to the backrest position.

[0027] A rear limiting support plate 5 is fixed to the lower end of the two side fixing brackets 2 along the rear end of the outer limiting slide groove 4. When the third bed frame 18 is unfolded, it fits against the upper surface of the rear limiting support plate 5. The rear limiting support plate 5 provides strong support for the third bed frame 18 when unfolded, ensuring its stability and preventing it from sinking or wobbling when bearing the weight of a person. A lower support plate 6 is fixed to the lower end of the rear limiting support plate 5. The lower support plate 6 further enhances the stability of the entire sofa bed frame 7, enabling it to withstand greater pressure.

[0028] A C-shaped fixing seat 22 is fixed to the lower end inside the lower support plate 6. A drive hydraulic rod 23 is rotatably connected to the C-shaped fixing seat 22 via a shaft. A fixing sleeve 24 is fixed to the output rod end of the drive hydraulic rod 23. The fixing sleeve 24 is fitted onto the outside of the intermediate actuating rod 14 between the two front extensions 17, and the fixing sleeve 24 is rotatably connected to the intermediate actuating rod 14. The drive hydraulic rod 23 serves as the power source for the unfolding and folding of the sofa bed. Through the extension and retraction of its output rod end, it can control the movement of the intermediate actuating rod 14, thereby realizing the automated unfolding and folding of the sofa bed.

[0029] The controller that controls the operation of the hydraulic rod 23 can be wired and installed inside the handrail seat 1; the oil circuit, oil tank and other structures that cooperate with the hydraulic rod 23 are integrated and installed at the lower end of the rear limit support plate 5.

[0030] The flip-up sofa bed converts into a bed by controlling the operation of the hydraulic control rod 23. When the output end of the hydraulic control rod 23 extends, it pushes the intermediate actuating rod 14 to move. Since the intermediate actuating rod 14 and the limiting plate 15 are confined within the side fixing frame 2, they can only slide along the inner limiting slide groove 3 and the outer limiting slide groove 4. Therefore, the intermediate actuating rod 14 slides forward between the two side fixing frames 2, driving the first bed frame 8 to move forward.

[0031] Because the front extension 17 and the intermediate actuating rod 14 are rotatably connected, and the rear extension 13 and the front extension 17 are connected via the intermediate actuating rod 14, when the first bed frame 8 moves forward, it will cause one end of the second bed frame 16 to move forward, thereby causing the second bed frame 16 to rotate and unfold. Since the second bed frame 16 and the third bed frame 18 are hinged, one end of the third bed frame 18 will move forward and downward. The third bed frame 18 is rotatably connected to the side fixing frame 2 via a flip pivot 21, allowing the third bed frame 18 to rotate and flatten around the flip pivot 21. At this time, the upper support frame 19 rotates and rests on the upper end of the rear limiting support plate 5, and the lower support frame 20 rotates to a horizontal position. After flipping and unfolding, the horizontal support frame 9, the second bed frame 16, the upper support frame 19, and the lower support frame 20 together form the reclining area of ​​the sofa bed, providing a comfortable resting space for the user.

[0032] When not in use, the output end of the drive hydraulic rod 23 retracts, pulling the intermediate actuating rod 14 backward. The horizontal support frame 9 forms the seat cushion of the sofa, the second bed frame 16 and the third bed frame 18 are folded to form the backrest of the sofa, and the lower support frame 20 extends downward, restoring the sofa to its regular shape. This flip-up and unfoldable design greatly improves the flexibility of the sofa bed and meets the needs of use in different scenarios.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flip-up and unfoldable sofa bed, comprising a sofa bed frame (7), characterized in that: The sofa bed frame (7) is composed of a first bed frame (8), a second bed frame (16), and a third bed frame (18). The first bed frame (8), the second bed frame (16), and the third bed frame (18) are arranged from front to back. The second bed frame (16) and the third bed frame (18) are located at the rear end and are arranged vertically in the retracted state. The first bed frame (8) includes a horizontal support frame (9), which is arranged horizontally. The rear extensions (13) are fixed on both sides of the rear end of the horizontal support frame (9). 3) A middle action rod (14) is fixedly fixed through the left and right sides of the second bed frame (16). A front extension (17) is fixed to the front end of the second bed frame (16) along the inner side of the rear extension (13). The front extension (17) is located outside the middle action rod (14) and is rotatably connected to the middle action rod (14). The third bed frame (18) includes an upper support frame (19) and a lower support frame (20). The upper support frame (19) and the lower support frame (20) are fixedly connected. The upper support frame (19) is rotatably connected to the second bed frame (16) through a hinge.

2. The flip-up and unfoldable sofa bed according to claim 1, characterized in that: The sofa bed frame (7) is provided with side fixing brackets (2) on both sides. The inner side of the side fixing bracket (2) is provided with an outer limiting groove (4) along the sliding path of the middle action rod (14). The outer side of the side fixing bracket (2) is provided with an armrest seat (1). The side fixing bracket (2) is embedded in the inner side of the armrest seat (1).

3. A flip-up and unfoldable sofa bed according to claim 2, characterized in that: The side fixing bracket (2) has an inner limiting groove (3) on the outside of the outer limiting groove (4) along its inner edge. The inner limiting groove (3) is connected to the outer limiting groove (4). The two ends of the intermediate action rod (14) pass through the outer limiting groove (4) and extend into the inner limiting groove (3) and are fixed with a limiting plate (15).

4. A flip-up and unfoldable sofa bed according to claim 2, characterized in that: The upper support frame (19) and the lower support frame (20) are connected by a rotating shaft (21) that passes through them on the left and right. The rear end of the inner side of the side fixing frame (2) is provided with a round hole along the rear end of the outer limiting groove (4). The other end of the rotating shaft (21) extends into the round hole on the inner side of the side fixing frame (2) and is rotatably connected to the side fixing frame (2).

5. A flip-up sofa bed according to claim 2, characterized in that: The lower end of the two side fixing brackets (2) is fixed with a rear limiting support plate (5) along the rear end of the outer limiting slide groove (4). The third bed frame (18) is in the unfolded state and is in contact with the upper surface of the rear limiting support plate (5). The lower end of the rear limiting support plate (5) is fixed with a lower support plate (6).

6. A flip-up and unfoldable sofa bed according to claim 5, characterized in that: The lower end of the lower support plate (6) is fixed with a C-shaped fixing seat (22). The C-shaped fixing seat (22) is rotatably connected to a driving hydraulic rod (23) via a shaft. The output rod end of the driving hydraulic rod (23) is fixed with a fixing sleeve (24). The fixing sleeve (24) is fitted onto the outside of the intermediate action rod (14) between the two front extensions (17). The fixing sleeve (24) is rotatably connected to the intermediate action rod (14).

7. A flip-up and unfoldable sofa bed according to claim 1, characterized in that: The front end of the horizontal support frame (9) is integrally connected to a vertical baffle (10), and the lower end of the rear end of the vertical baffle (10) is integrally connected to a horizontal fixing plate (11). Multiple movable rollers (12) are installed in a left-right array at the lower end of the horizontal fixing plate (11).

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