A sofa bed structure that saves effort by pushing and pulling.

Abstract

This utility model discloses a push-pull effort-saving sofa bed structure, relating to the field of sofa beds. It addresses the problem of time-consuming and laborious operation due to the fixed push-pull stroke in existing technologies and the relatively heavy weight of the sofa bed frame. The fixed base includes a first limiting plate, with a first rotating gear rotatably connected to its lower end via a shaft. A second rotating gear is coaxially connected to the lower end of the first rotating gear. The front movable bed frame includes a second limiting plate, with multiple lower fixing blocks fixed in an array at its lower end. A first rack is integrally connected to the front end of each lower fixing block, and the first rack corresponds to and meshes with the first rotating gear in a left-right position. The push-pull assembly includes a lower sliding plate, with multiple front fixing blocks fixed in an array at its rear end. A second rack is integrally connected to the rear end of each front fixing block, and the second rack corresponds to and meshes with the second rotating gear in a left-right position.

Description

Technical Field

[0001] This utility model relates to the field of sofa beds, specifically a sofa bed structure that is easy to push and pull. Background Technology

[0002] Sofa beds, as a type of furniture that combines sitting and reclining functions, are widely used in family living rooms, guest rooms, office rest areas, and other settings. Their core design goal is to achieve efficient space utilization through structural innovation, while simultaneously meeting users' dual needs for comfort and functionality.

[0003] The structural evolution of traditional sofa beds has shifted from fixed to deformable designs. In the field of pull-out sofa beds, existing technology has formed a typical structure centered on a sliding rail mechanism. This type of structure typically includes a fixed frame, a movable bed body, and guide components. The guide components often employ metal slide rails, rollers, or bearings, achieving linear displacement of the movable bed body through sliding engagement. For example, Chinese authorized patent CN 218978441 U (A Push-Pull Effort-Saving Sofa Bed Structure) includes: a sofa bed body, on which multiple first bed boards are fixedly installed; multiple second bed boards are slidably disposed on the sofa bed body; a side panel is fixedly disposed on one side of each of the multiple second bed boards; a locking block is fixedly disposed on each of the second bed boards; and locking grooves are provided on both sides of each of the first bed boards. This utility model has a reasonable structural design, which can reduce friction during the pushing and pulling process, making it more convenient and effortless to push and pull. It also facilitates the positioning of the second bed boards, preventing them from sliding and shifting during use and affecting normal use.

[0004] Although the aforementioned existing technology can reduce friction during the pushing and pulling process, making it more effortless, the pushing and pulling stroke remains unchanged. Given the relatively heavy weight of the sofa and bed frame, it still requires considerable effort and a long time to complete the pushing and pulling. Utility Model Content

[0005] The purpose of this utility model is to provide a sofa bed structure that is easy to push and pull, in order to solve the problem mentioned in the background art that the push and pull stroke remains unchanged, and that it takes a lot of effort and time to push and pull the sofa bed frame which is relatively heavy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a push-pull effortless sofa bed structure, comprising a sofa bed body, the sofa bed body being composed of a fixed base, a front movable bed frame, and a push-pull assembly; the fixed base includes a first limiting plate, the lower end of the first limiting plate being rotatably connected to a first rotating gear via a shaft, the first rotating gear array having multiple first rotating gears, the lower end of the first rotating gear being coaxially connected to a second rotating gear; the front movable bed frame includes a second limiting plate, the lower end of the second limiting plate being fixedly arrayed with multiple lower fixing blocks, the front end of the lower fixing blocks being integrally connected to a first rack, the first rack being corresponding to and meshing with the first rotating gear in left and right positions; the push-pull assembly includes a lower sliding plate, the rear end of the lower sliding plate being fixedly arrayed with multiple front fixing blocks, the rear end of the front fixing blocks being integrally connected to a second rack, the second rack being corresponding to and meshing with the second rotating gear in left and right positions.

[0007] Preferably, the fixed base further includes a rear fixed frame, and a plurality of front sliding plates are equidistantly connected to the front end of the rear fixed frame. A first limiting plate is fixed to the front end of the lower end of the plurality of front sliding plates, and a front slot is formed between the plurality of front sliding plates.

[0008] Preferably, the front movable bed frame further includes a front fixed frame, and a plurality of rear sliding plates are equidistantly connected to the rear end of the front fixed frame. A second limiting plate is fixed to the rear end of the lower end of the plurality of rear sliding plates. The front sliding plates and the rear sliding plates are staggered, and a rear slot is formed between the plurality of rear sliding plates. The front slot matches the shape of the rear sliding plate, and the rear slot matches the shape of the front sliding plate.

[0009] Preferably, the fixed base is connected to the side of the front movable bed frame via a side ball bearing slide rail.

[0010] Preferably, the rear ends of the lower ends of the plurality of front sliding plates are jointly fixed with a rear limiting plate, and the front end of the rear limiting plate is fixed with a plurality of rear limiting rods. A limiting hole groove is formed in the second rack, and the second rack moves along the rear limiting rods for limiting.

[0011] Preferably, a rectangular sliding slot is provided on the lower end face of the front fixed frame, and multiple limiting sliding rods are fixed in an array in the rectangular sliding slot. An upper sliding plate is slidably connected to the outside of the limiting sliding rods in the rectangular sliding slot, and the upper sliding plate is integrally connected to the upper end of the lower sliding plate.

[0012] Preferably, a fixed horizontal plate is fixed to the lower end of the rear end of the lower sliding plate, and multiple movable rollers are arrayed at the lower end of the fixed horizontal plate.

[0013] Preferably, the sofa bed body is provided with an external armrest and backrest frame, a backrest pillow is provided at the rear end between the sofa bed body and the external armrest and backrest frame, and two seat cushions are provided at the upper end of the sofa bed body.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) In this utility model, the gear and rack transmission design uses gears of different sizes to achieve accelerated transmission, so that when the sliding plate is pulled or pushed, the front moving bed frame can move at a faster speed, reducing the user's operating effort. Whether it is a person with less strength or an elderly user, they can easily complete the operation of stretching and closing the sofa bed, improving the user experience; and the use of gears of different sizes to achieve accelerated transmission reduces the time required for stretching and closing the sofa bed.

[0016] (2) In this utility model, the fixed base is connected to the side of the front movable bed frame through a side ball bearing slide rail, which enables the bed frame to slide smoothly along the slide rail during movement, effectively reducing jamming and shaking, improving the service life and safety of the sofa bed, and providing users with a more stable and reliable usage environment.

[0017] (3) In this utility model, the front slot and front sliding plate on the fixed base are staggered with the rear slot and rear sliding plate on the front movable bed frame. The front slot and the rear sliding plate are in the same shape, and the rear slot and the front sliding plate are in the same shape, so that the bed frame can fit tightly during the stretching and shrinking process, which further enhances the overall stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a push-pull effort-saving sofa bed according to the present invention from a frontal perspective;

[0019] Figure 2 This is a schematic diagram of the overall structure of a push-pull effort-saving sofa bed according to the present invention, viewed from an upward angle.

[0020] Figure 3 This is a schematic diagram of the main body of a sofa bed structure that allows for easy pushing and pulling, according to this utility model.

[0021] Figure 4 This is a schematic diagram of the fixed base of a push-pull sofa bed structure according to the present invention;

[0022] Figure 5 This is a schematic diagram of the front movable bed frame of a push-pull effort-saving sofa bed structure according to this utility model;

[0023] Figure 6 This is a schematic diagram of the push-pull component of a push-pull sofa bed structure that saves effort.

[0024] In the diagram: 1. Sofa bed body; 2. Outer armrest and backrest frame; 3. Backrest pillow; 4. Seat cushion; 5. Fixed base; 6. Rear fixed frame; 7. Front slot; 8. Front sliding plate; 9. First limiting plate; 10. First rotating gear; 11. Second rotating gear; 12. Side ball bearing slide rail; 13. Rear limiting upright plate; 14. Rear limiting rod; 15. Front movable bed frame; 16. Front fixed frame; 17. Rear slot; 18. Rear sliding plate; 19. Second limiting plate; 20. Lower fixed block; 21. First rack; 22. Rectangular sliding slot; 23. Limiting sliding rod; 24. Push-pull assembly; 25. Upper sliding plate; 26. Lower sliding plate; 27. Fixed cross plate; 28. Moving roller; 29. ​​Front fixed block; 30. Second rack; 31. Limiting hole slot. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-6 This utility model provides an embodiment of a push-pull effortless sofa bed structure, mainly composed of a sofa bed body 1, an outer armrest and backrest frame 2, a backrest pillow 3, and a seat cushion 4. The sofa bed body 1 is equipped with an outer armrest and backrest frame 2, providing comfortable support for the user. A backrest pillow 3 is located at the rear end between the sofa bed body 1 and the outer armrest and backrest frame 2, increasing comfort. Two seat cushions 4 are located at the upper end of the sofa bed body 1. When the sofa bed is pulled out, the seat cushions 4 can be removed and placed on the upper end of the forward movable bed frame 15 to form a complete bed frame structure, meeting different usage needs.

[0027] The sofa bed body 1 is the core part, consisting of a fixed base 5, a front movable bed frame 15 and a push-pull assembly 24; the fixed base 5 and the side of the front movable bed frame 15 are connected by a side ball bearing slide rail 12.

[0028] Fixed base 5: The fixed base 5 is equipped with a rear fixed frame 6. Multiple front sliding plates 8 are equidistantly connected to the front end of the rear fixed frame 6, forming a front slot 7 between the multiple front sliding plates 8. A first limiting plate 9 is fixed to the front end of the lower end of the multiple front sliding plates 8. Multiple first rotating gears 10 are rotatably connected to the lower end of the first limiting plate 9 via a shaft. A second rotating gear 11 is coaxially connected to the lower end of each first rotating gear 10. A rear limiting upright plate 13 is jointly fixed to the rear end of the lower end of the multiple front sliding plates 8. Multiple rear limiting rods 14 are arrayed and fixed to the front end of the rear limiting upright plate 13. This structural design provides a stable support foundation for the entire sofa bed. The front slot 7, in conjunction with the structure on the front movable bed frame 15, ensures the stability of the bed frame during extension and retraction. The rear limiting upright plate 13 and the rear limiting rods 14 provide a limit for the subsequent movement of the second rack 30, ensuring the accuracy of the transmission process and greatly improving the stability of the sofa bed during use.

[0029] Front movable bed frame 15: The front movable bed frame 15 includes a front fixed frame 16, with multiple rear sliding plates 18 equidistantly connected to the rear end of the front fixed frame 16. A second limiting plate 19 is fixed to the rear end of the lower end of the multiple rear sliding plates 18, and a rear slot 17 is formed between the multiple rear sliding plates 18. The front slot 7 matches the shape of the rear sliding plate 18, and the rear slot 17 matches the shape of the front sliding plate 8, with the front sliding plate 8 and the rear sliding plate 18 being staggered. This staggered arrangement and shape matching design allows the front movable bed frame 15 to fit tightly with the fixed base 5 during movement.

[0030] The lower end of the second limiting plate 19 is fixed with multiple lower fixing blocks 20. The front end of the lower fixing block 20 is integrally connected with a first rack 21. The first rack 21 corresponds to and meshes with the first rotating gear 10 in the left and right positions.

[0031] A rectangular sliding slot 22 is provided on the lower end face of the front fixed frame 16. Multiple limiting sliding rods 23 are fixed in an array within the rectangular sliding slot 22. An upper sliding plate 25 is slidably connected to the outside of the limiting sliding rods 23 within the rectangular sliding slot 22. The upper sliding plate 25 slides along the limiting sliding rods 23 within the rectangular sliding slot 22, ensuring the straightness and stability of the movement of the front moving bed frame 15 and effectively preventing the bed frame from shaking or jamming during movement.

[0032] Push-pull assembly 24: The push-pull assembly 24 includes a lower sliding plate 26, which is integrally connected to the lower end of the upper sliding plate 25. The front end of the lower sliding plate 26 is provided with a pull groove for easy pulling by the user.

[0033] Multiple front fixing blocks 29 are fixed to the rear end of the lower sliding plate 26. The rear end of the front fixing block 29 is integrally connected to the second rack 30. The second rack 30 corresponds to and meshes with the second rotating gear 11 in the left and right positions. A limit hole groove 31 is opened in the second rack 30. The second rack 30 moves along the rear limit rod 14 for limitation.

[0034] A fixed horizontal plate 27 is fixed to the lower rear end of the sliding plate 26. Multiple movable rollers 28 are arranged in an array at the lower end of the fixed horizontal plate 27. The arrangement of the movable rollers 28 makes the sliding plate 26 move more smoothly and further reduces the operating resistance.

[0035] Pulling the lower sliding plate 26 via the groove causes the front end of the push-pull assembly 24 to move, which in turn drives the second rotating gear 11 to rotate as the second rack 30 moves forward. Since the second rotating gear 11 and the first rotating gear 10 are coaxially connected, and the first rotating gear 10 is meshed with the first rack 21, and the first rotating gear 10 is smaller than the second rotating gear 11, according to the gear transmission principle, when the smaller gear drives the larger gear, the linear velocity of the larger gear will be faster. Therefore, the first rack 21 accelerates forward, driving the entire front moving bed frame 15 forward. This gear and rack transmission design utilizes the transmission ratio of different gear sizes to achieve accelerated transmission, allowing the front moving bed frame 15 to move quickly when the user pulls the lower sliding plate 26.

[0036] The dimensions of the sofa bed body 1 shown in the figure can be adjusted according to actual needs. It can be made longer to accommodate the seating needs of large families. When the sofa is pulled out, it can be made wider so that two people can lie down on the sofa bed. At the same time, the depth of the sofa can be increased so that the sitting posture can be more varied.

[0037] The process of extending and closing the sofa bed:

[0038] Stretching Process: When the sofa bed needs to be pulled out, the lower sliding plate 26 is pulled by the groove at the front end of the lower sliding plate 26, causing the front end of the push-pull assembly 24 to move. During its forward movement, the second rack 30, due to its meshing with the second rotating gear 11, drives the second rotating gear 11 to rotate. Since the second rotating gear 11 and the first rotating gear 10 are coaxially connected, the first rotating gear 10 rotates accordingly. Because the first rotating gear 10 and the first rack 21 are meshed, and the first rotating gear 10 is smaller than the second rotating gear 11, the first rack 21 accelerates forward, thereby driving the entire front moving bed frame 15 forward. During this process, the front slot 7 and the front sliding plate 8 on the fixed base 5 are staggered with the rear slot 17 and the rear sliding plate 18 on the front moving bed frame 15, maintaining flush movement at their upper surfaces, ensuring smooth movement. The stretching operation is completed when the first limiting plate 9 and the second limiting plate 19 contact, stretching to the target position. At this point, the bed frame is fixed by its own weight, which is simple and reliable and can effectively prevent the bed frame from shifting during use.

[0039] After unfolding, remove the seat cushion 4 and place it on the upper end of the front movable bed frame 15 to form a complete bed frame structure for resting. At this time, the upper sliding plate 25 is located at the rear end of the rectangular sliding slot 22.

[0040] Closing Process: When the bed frame structure needs to be closed, push the lower sliding plate 26 backward. Through the transmission of the first rotating gear 10, the second rotating gear 11, the first rack 21, and the second rack 30, the front moving bed frame 15 moves backward. The second rack 30 moves along the rear limit rod 14, ensuring the accuracy of the transmission. The closing process stops when the second limit plate 19 contacts the rear limit plate 13. At this point, the front sliding plate 8 is fully embedded in the rear slot 17, and the rear sliding plate 18 is fully embedded in the front slot 7, completing the closing operation of the sofa bed. This closing process also utilizes the gear and rack transmission principle, making operation effortless.

[0041] 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 pull and push effort saving sofa bed structure comprising a sofa bed body (1), characterized by: The sofa bed body (1) consists of a fixed base (5), a front movable bed frame (15), and a push-pull assembly (24). The fixed base (5) includes a first limiting plate (9), the lower end of which is rotatably connected to a first rotating gear (10) via a shaft. Multiple first rotating gears (10) are arranged in an array, and the lower end of each first rotating gear (10) is coaxially connected to a second rotating gear (11). The front movable bed frame (15) includes a second limiting plate (19), the lower end of which is rotatably connected to a fixed base (5), a front movable bed frame (15), and a push-pull assembly (24). The assembly includes multiple lower fixing blocks (20), with a first rack (21) integrally connected to the front end of each lower fixing block (20). The first rack (21) is in the left-right position and meshes with the first rotating gear (10). The push-pull assembly (24) includes a lower sliding plate (26), with multiple front fixing blocks (29) fixed in an array at the rear end of the lower sliding plate (26). The rear end of each front fixing block (29) is integrally connected to a second rack (30), with the second rack (30) in the left-right position and meshing with the second rotating gear (11).

2. A push-pull labor-saving sofa bed structure according to claim 1, characterized in that: The fixed base (5) also includes a rear fixed frame (6), and a plurality of front sliding plates (8) are equidistantly connected to the front end of the rear fixed frame (6). A first limiting plate (9) is fixed to the front end of the lower end of the plurality of front sliding plates (8), and a front slot (7) is formed between the plurality of front sliding plates (8).

3. A push-pull effort conserving sofa bed structure as defined in claim 2 wherein: The front movable bed frame (15) also includes a front fixed frame (16), and a plurality of rear sliding plates (18) are equidistantly connected to the rear end of the front fixed frame (16). A second limiting plate (19) is fixed to the rear end of the lower end of the plurality of rear sliding plates (18). The front sliding plates (8) and the rear sliding plates (18) are staggered, and a rear slot (17) is formed between the plurality of rear sliding plates (18). The front slot (7) matches the shape of the rear sliding plate (18), and the rear slot (17) matches the shape of the front sliding plate (8).

4. The push-pull effort-saving sofa bed structure according to claim 1, characterized in that: The fixed base (5) is connected to the side of the front movable bed frame (15) via a side ball bearing slide rail (12).

5. The push-pull effort-saving sofa bed structure according to claim 2, characterized in that: The rear ends of the lower ends of the multiple front sliding plates (8) are jointly fixed with a rear limiting plate (13), and the front end of the rear limiting plate (13) is fixed with multiple rear limiting rods (14). A limiting hole groove (31) is opened in the second rack (30), and the second rack (30) moves along the rear limiting rod (14) for limitation.

6. The push-pull effort-saving sofa bed structure according to claim 3, characterized in that: The lower end face of the front fixed frame (16) is provided with a rectangular sliding slot (22). Multiple limiting sliding rods (23) are fixed in an array in the rectangular sliding slot (22). An upper sliding plate (25) is slidably connected to the outside of the limiting sliding rods (23) in the rectangular sliding slot (22). The upper sliding plate (25) is integrally connected to the upper end of the lower sliding plate (26).

7. The push-pull effort-saving sofa bed structure according to claim 1, characterized in that: The lower end of the lower sliding plate (26) is fixed with a fixed horizontal plate (27), and a plurality of movable rollers (28) are arranged in an array at the lower end of the fixed horizontal plate (27).

8. The push-pull effort-saving sofa bed structure according to claim 1, characterized in that: The sofa bed body (1) is provided with an outer armrest backrest frame (2), and a pillow (3) is provided at the rear end between the sofa bed body (1) and the outer armrest backrest frame (2). Two cushions (4) are provided at the upper end of the sofa bed body (1).

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