Four-connecting-rod type backrest separating mechanism

Abstract

The utility model discloses a four-connecting-rod type backrest separating mechanism which comprises a bed board assembly, a bottom frame, a head motor assembly, a back motor assembly and a waist motor assembly. The bed board assembly comprises a head bed board, a back bed board and a waist bed board which are arranged in sequence; the head bed board is rotationally connected with the back bed board through a head motor assembly, the lower surface of the back bed board is fixedly connected with a back upper frame, and the back upper frame is movably connected with the bottom frame through a back motor assembly; the waist bed board is rotationally connected with the back bed board through a waist motor assembly. Through cooperative driving of the head motor assembly, the back motor assembly and the waist motor assembly, the independent angle adjusting function of the head bed plate, the back bed plate and the waist bed plate is achieved, meanwhile, the head bed plate, the back bed plate and the waist bed plate can be in linkage for angle adjustment, and therefore high-individuation comfortable experience is provided for a user, and the user experience is improved. And different requirements of the electric bed in various scenes are greatly enriched.

Description

Technical Field

[0001] This utility model relates to the field of electric bed technology, specifically to a four-bar linkage backrest release mechanism. Background Technology

[0002] With the ever-accelerating pace of modern life, people are increasingly aware that good sleep and rest are key factors in restoring energy and maintaining physical and mental health amidst their busy work and lives. Sleep quality not only directly affects people's daily mental state and work efficiency, but also, in the long run, is closely related to their physical health. Electric beds, which can actively adjust posture, have gradually entered the public eye, allowing people to adjust the bed's position according to their own needs while resting, thereby obtaining a better sleep and relaxation experience.

[0003] Traditional electric beds typically offer only limited and simple adjustments to the headboard, failing to meet users' needs for precise support for different body parts and diverse posture adjustments. They also suffer from low adjustment freedom, unsmooth posture transitions, and stress concentration, making them prone to damage. Furthermore, when placed against a wall, adjustments to the bed structure, such as raising the backrest, can easily cause the bed to bump against the wall, potentially damaging both the wall and the bed, affecting the user experience, and posing certain safety hazards.

[0004] Based on the above, this utility model proposes a four-bar linkage backrest release mechanism, which can effectively solve the above problems. Utility Model Content

[0005] This utility model addresses the shortcomings of the existing technology by providing a four-bar linkage backrest release mechanism.

[0006] This utility model is achieved through the following technical solution:

[0007] A four-bar linkage backrest release mechanism includes a bed board assembly, a base frame, a head motor assembly, a back motor assembly, and a lumbar motor assembly. The base frame is installed below the bed board assembly. The bed board assembly includes a headboard, a backboard, and a lumbar board arranged sequentially. The headboard, backboard, and lumbar board are rotatably connected by hinges. The headboard is rotatably connected to the backboard via the head motor assembly. A back upper frame is fixedly connected to the lower surface of the backboard, and the back upper frame is movably connected to the base frame via the back motor assembly. The lumbar board is rotatably connected to the backboard via the lumbar motor assembly.

[0008] According to the above technical solution, as a further preferred technical solution, the head motor assembly includes a first drive motor rotatably connected to the backrest bed board, and a head hinge rotatably connected to the output end of the first drive motor, wherein the head hinge is installed between the headrest bed board and the backrest bed board.

[0009] According to the above technical solution, as a further preferred technical solution, the back motor assembly includes a second drive motor rotatably connected to the bottom frame, a fixed bracket rotatably connected to the output end of the second drive motor, a bracket connecting rod fixedly connected to the fixed bracket, and roller brackets fixedly connected to both ends of the bracket connecting rod respectively; the lower end of the roller bracket is rotatably connected to the bottom frame, and a roller is installed on the upper end of the roller bracket. The roller is installed in a slide rail, and the slide rail is fixedly connected to the upper back frame; a first connecting plate is fixedly connected to both sides of the upper back frame respectively. One end of the first connecting plate is fixedly connected to one end of the second connecting plate through a first connecting rod, and the other end of the first connecting plate is fixedly connected to the other end of the second connecting plate through a second connecting rod. The second connecting plate is fixedly connected to the bottom frame.

[0010] According to the above technical solution, as a further preferred technical solution, the lumbar motor assembly includes a third drive motor rotatably connected to the backrest bed board, and a lumbar hinge rotatably connected to the output end of the third drive motor, wherein the lumbar hinge is installed between the lumbar bed board and the backrest bed board.

[0011] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0012] This utility model provides a four-bar linkage backrest release mechanism. Through the coordinated drive of the headrest motor assembly, backrest motor assembly, and lumbar motor assembly, it realizes the independent angle adjustment function of the headrest, backrest, and lumbar bed boards. At the same time, it can also link the headrest, backrest, and lumbar bed boards for angle adjustment, thereby providing users with a highly personalized comfort experience and greatly enriching the different needs of electric beds in various scenarios. Meanwhile, the backrest motor assembly adopts a guide system with rollers and slide rails, forming a linkage mechanism with the first and second connecting plates, creating a four-bar linkage connection structure. This ensures the stability of the connection between the backrest bed board and the bottom frame, withstands greater forces during adjustment, and ensures safety and reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model from the left view.

[0015] Figure 3This is a schematic diagram of the overall structure of this utility model from another angle;

[0016] Figure 4-5 This is a schematic diagram illustrating the application of this utility model when placed against a wall. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0018] A four-bar linkage backrest release mechanism includes a bed board assembly 1, a base frame 2, a head motor assembly 3, a back motor assembly 4, and a lumbar motor assembly 5. The base frame 2 is installed below the bed board assembly 1. The bed board assembly 1 includes a headboard 11, a backboard 12, and a lumbar board 13 arranged sequentially. The headboard 11, backboard 12, and lumbar board 13 are rotatably connected by hinges. The headboard 11 is rotatably connected to the backboard 12 via the head motor assembly 3. A backrest upper frame 6 is fixedly connected to the lower surface of the backboard 12, and the backrest upper frame 6 is movably connected to the base frame 2 via the back motor assembly 4. The lumbar board 13 is rotatably connected to the backboard 12 via the lumbar motor assembly 5.

[0019] This invention utilizes the coordinated drive of three independent motor assemblies—head motor assembly 3, back motor assembly 4, and lumbar motor assembly 5—to achieve independent angle adjustment of the headboard 11, backboard 12, and lumbar board 13. Simultaneously, these assemblies can be linked for angle adjustment, providing users with a highly personalized comfort experience and greatly enriching the various needs of electric beds in different scenarios. Furthermore, when the bed is placed against a wall and the upper backrest frame 6 is raised and adjusted, the rear bed (not shown in the figure) remains stationary. The lumbar board 13 moves from the side closest to the rear bed towards the side diagonally downwards away from the rear bed. Simultaneously, the headboard, backboard, and lumbar board, with their sides against the wall, move upwards towards the rear bed, allowing the front bed (i.e., headboard 11, backboard 12, and lumbar board 13) to detach from the rear bed, ensuring reliable wall placement without the risk of collision with the wall.

[0020] Furthermore, in another embodiment, the head motor assembly 3 includes a first drive motor 31 rotatably connected to the backrest bed 12, and a head hinge 32 rotatably connected to the output end of the first drive motor 31, the head hinge 32 being installed between the headrest bed 11 and the backrest bed 12.

[0021] When the headrest 11 needs to be adjusted, the first drive motor 31 in the head motor assembly 3 is activated. The first drive motor 31 outputs power, which drives the head hinge 32, which is rotatably connected to the output end. Since the head hinge 32 is installed between the headrest 11 and the backrest 12, the headrest 11 rotates relative to the backrest 12, thereby adjusting the head support angle to meet the user's needs for reading, watching TV, etc.

[0022] Furthermore, in another embodiment, the back motor assembly 4 includes a second drive motor 41 rotatably connected to the bottom frame 2, a fixed bracket 42 rotatably connected to the output end of the second drive motor 41, a bracket connecting rod 43 fixedly connected to the fixed bracket 42, and roller brackets 44 fixedly connected to both ends of the bracket connecting rod 43 respectively; the lower end of the roller bracket 44 is rotatably connected to the bottom frame 2, and a roller 45 is installed on the upper end of the roller bracket 44. The roller 45 is installed in a slide rail 46, and the slide rail 46 is fixedly connected to the upper back frame 6; a first connecting plate 47 is fixedly connected to both sides of the upper back frame 6 respectively. One end of the first connecting plate 47 is fixedly connected to one end of a second connecting plate 49 through a first connecting rod 48, and the other end of the first connecting plate 47 is fixedly connected to the other end of the second connecting plate 49 through a second connecting rod 410. The second connecting plate 49 is fixedly connected to the bottom frame 2.

[0023] When the angle of the backrest bed board 12 needs to be adjusted, the second drive motor 41 in the backrest motor assembly 4 is activated. The second drive motor 41 drives the first fixed bracket 42 to rotate. The first fixed bracket 42 drives the first bracket connecting rod 43 fixedly connected to it. The roller brackets 44 at both ends of the first bracket connecting rod 43 move accordingly. The lower end of the roller bracket 44 is rotatably connected to the bottom frame 2, and the upper end of the first roller 45 rolls in the first slide rail 46 fixedly connected to the upper backrest frame 6, thereby pushing the upper backrest frame 6 and the backrest bed board 12 fixed on it to rotate relative to the bottom frame 2, realizing the adjustment of the angle of the backrest bed board 12. At the same time, the backrest motor assembly 4 uses a guide system with rollers 45 and slide rail 46 to form a double connecting plate linkage mechanism with the first connecting plate 47 and the second connecting plate 49, forming a four-bar linkage connection structure, which ensures the stability of the connection between the backrest bed board 12 and the bottom frame 2, and can withstand greater force during the adjustment process, ensuring safety and reliability.

[0024] Furthermore, in another embodiment, the lumbar motor assembly 5 includes a third drive motor 51 rotatably connected to the backrest bed 12, and a lumbar hinge 52 rotatably connected to the output end of the third drive motor 51, the lumbar hinge 52 being installed between the lumbar bed 13 and the backrest bed 12.

[0025] When the angle of the lumbar support bed board 13 needs to be adjusted, the third drive motor 51 in the lumbar motor assembly 5 is activated. The third drive motor 51 drives the lumbar hinge 52, which is rotatably connected to the output end. Since the lumbar hinge 52 is installed between the lumbar support bed board 13 and the backrest bed board 12, it causes the lumbar support bed board 13 to rotate relative to the backrest bed board 12, so that the angle of the lumbar support bed board 13 can be adjusted independently, better conforming to the curve of the human waist and relieving lumbar pressure.

[0026] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use a four-bar linkage backrest release mechanism of this utility model, and can produce the positive effects described in this utility model.

[0027] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0028] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A four-bar linkage backrest release mechanism, characterized in that: The device includes a bed board assembly (1), a bottom frame (2), a head motor assembly (3), a back motor assembly (4), and a lumbar motor assembly (5); the bottom frame (2) is installed below the bed board assembly (1); the bed board assembly (1) includes a head bed board (11), a back bed board (12), and a lumbar bed board (13) arranged sequentially; the head bed board (11), the back bed board (12), and the lumbar bed board (13) are rotatably connected by hinges; the head bed board (11) is rotatably connected to the back bed board (12) through the head motor assembly (3), and a back upper frame (6) is fixedly connected to the lower surface of the back bed board (12), and the back upper frame (6) is movably connected to the bottom frame (2) through the back motor assembly (4); the lumbar bed board (13) is rotatably connected to the back bed board (12) through the lumbar motor assembly (5).

2. The four-bar linkage backrest release mechanism according to claim 1, characterized in that: The head motor assembly (3) includes a first drive motor (31) rotatably connected to the backrest bed board (12), and a head hinge (32) rotatably connected to the output end of the first drive motor (31). The head hinge (32) is installed between the headrest bed board (11) and the backrest bed board (12).

3. The four-bar linkage backrest release mechanism according to claim 1, characterized in that: The back motor assembly (4) includes a second drive motor (41) rotatably connected to the bottom frame (2), a fixed bracket (42) rotatably connected to the output end of the second drive motor (41), a bracket connecting rod (43) fixedly connected to the fixed bracket (42), and roller brackets (44) fixedly connected to both ends of the bracket connecting rod (43); the lower end of the roller bracket (44) is rotatably connected to the bottom frame (2), and a roller (45) is mounted on the upper end of the roller bracket (44). Installed in a slide rail (46), the slide rail (46) is fixedly connected to the upper back frame (6); a first connecting plate (47) is fixedly connected to both sides of the upper back frame (6), one end of the first connecting plate (47) is fixedly connected to one end of the second connecting plate (49) through a first connecting rod (48), the other end of the first connecting plate (47) is fixedly connected to the other end of the second connecting plate (49) through a second connecting rod (410), and the second connecting plate (49) is fixedly connected to the bottom frame (2).

4. The four-bar linkage backrest release mechanism according to claim 1, characterized in that: The lumbar motor assembly (5) includes a third drive motor (51) rotatably connected to the backrest bed board (12), and a lumbar hinge (52) rotatably connected to the output end of the third drive motor (51). The lumbar hinge (52) is installed between the lumbar bed board (13) and the backrest bed board (12).

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