Leg separating mechanism for nursing bed

Abstract

The utility model discloses a leg separating mechanism for a nursing bed. The leg separating mechanism comprises a first supporting plate and a second supporting plate which are used for lifting and separating left and right legs, the middle of the lower bottom face of the first supporting plate is hinged to the upper end of the first crank, the inner side of the lower bottom face of the first supporting plate is hinged to the upper end of the first connecting rod, the middle of the lower bottom face of the second supporting plate is hinged to the upper end of the second crank, and the inner side of the lower bottom face of the second supporting plate is hinged to the upper end of the second connecting rod. The lower end of the first crank and the lower end of the second crank are hinged to the fixing blocks below the side beams on the left side and the right side respectively. The middle of the first connecting rod is hinged to the fixing block located on the same side below the beam, and the lower end of the second connecting rod is hinged to the fixing block located on the same side below the beam. A stand column is fixed below the left side beam or the right side beam of the central bed frame, the lower portion of the stand column is hinged to one end of a telescopic device, and the other end of the telescopic device is hinged to the middle of a second crank. And the other end of the pull rod is hinged with the middle part of the second connecting rod.

Description

Technical Field

[0001] This utility model relates to the field of nursing equipment technology, and in particular to a leg-split mechanism for a nursing bed. Background Technology

[0002] CN202320584646.3 discloses a leg-split mechanism for a nursing bed, in which a column is fixedly connected to the bottom surface of the central bed frame of the lower leg frame on both the left and right sides. The lower middle part of the left column is hinged to the lower end of a second telescopic device on the left, and the upper end of the second telescopic device on the left is hinged to the bottom surface of a first support plate located on the right side of the central bed frame. The lower middle part of the right column is hinged to the lower end of a second telescopic device on the right, and the upper end of the second telescopic device on the right is hinged to the bottom surface of a first support plate located on the left side of the central bed frame. When the second telescopic device on the left extends, the first support plate on the right side of the central bed frame rises to the right and upward; when the second telescopic device on the right extends, the first support plate on the left side of the central bed frame rises to the left and upward.

[0003] During use, it was found that this design still has some shortcomings, such as:

[0004] (1) Multi-motor control leads to increased cost and complexity.

[0005] Using two independent motors to control the leg-spreading movements of the left and right pallets requires a double drive unit and a synchronization control system. This not only significantly increases hardware costs but also raises the complexity of the mechanical structure, leading to increased assembly and maintenance difficulties. Multi-motor systems are prone to synchronization errors that can cause inconsistent movements of the two pallets, affecting user experience, and may even lead to a higher failure rate over long-term use due to differences in motor performance.

[0006] (2) Insufficient energy consumption and space utilization

[0007] Dual-motor configurations require more power and occupy more internal space in the nursing bed. In space-constrained medical or home settings, redundant motor layouts limit the integration of other functional modules (such as lifting and turning mechanisms), reducing the overall compactness of the equipment. Furthermore, the combined energy consumption of multiple motors leads to energy waste, which is inconsistent with green and energy-saving trends.

[0008] (3) Limited functional scalability and reliability

[0009] Dual-motor systems require independent design of control circuits and mechanical transmission components. When expanding new functions (such as anti-slip and angle adjustment), additional sensors and actuators are needed, further increasing costs.

[0010] Therefore, how to design a leg-split mechanism with a simpler structure, lower cost, and applicability to nursing beds has become one of the technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0011] The purpose of this invention is to provide a leg-split mechanism for a nursing bed.

[0012] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0013] A leg-spreading mechanism for a nursing bed includes a first support plate and a second support plate for lifting and separating the left and right legs;

[0014] The middle part of the lower bottom surface of the first support plate is hinged to the upper end of the first crank, the inner side of the lower bottom surface of the first support plate is hinged to the upper end of the first connecting rod, the middle part of the lower bottom surface of the second support plate is hinged to the upper end of the second crank, and the inner side of the lower bottom surface of the second support plate is hinged to the upper end of the second connecting rod.

[0015] Fixing blocks are fixed under the side beams on both sides of the central bed frame. The lower ends of the first crank and the second crank are respectively hinged to the fixing blocks under the side beams on the left and right sides.

[0016] A fixing block is also fixed below the crossbeam located in the middle of the central bed frame; the middle part of the first connecting rod is hinged to the fixing block located on the same side below the crossbeam, and the lower end of the second connecting rod is hinged to the fixing block located on the same side below the crossbeam.

[0017] A column is fixed below the side beam on the left or right side of the central bed frame. The lower part of the column is hinged to one end of the telescopic device, and the other end of the telescopic device is hinged to the middle of the second crank.

[0018] The lower end of the first connecting rod is hinged to one end of the pull rod, and the other end of the pull rod is hinged to the middle of the second connecting rod.

[0019] Furthermore, the lower end of the upright is fixedly connected to the middle of the crossbar, and the left and right ends of the crossbar are fixedly connected to the crossbeam of the central bed frame through a fixing frame.

[0020] Furthermore, when the telescopic device retracts, the first and second support plates fall down and are positioned at the same horizontal level as the central bed frame. When the telescopic device extends, the first and second support plates rise diagonally upwards.

[0021] Furthermore, there are two crossbeams in the middle of the central bed frame, with the first and second support plates positioned between them when lowered.

[0022] Furthermore, there are two of each of the first and second links.

[0023] Furthermore, the telescopic device is a cylinder, a hydraulic cylinder, or an electric push rod.

[0024] Compared with the prior art, the outstanding advantages of this utility model are:

[0025] (1) Single motor drive achieves efficient synchronous control

[0026] This utility model's leg-spreading mechanism for a nursing bed transmits power from a single telescopic device to the two side supports via a linkage mechanism, requiring only one motor to complete the leg-spreading action. Compared to a dual-motor solution, this significantly reduces hardware costs and control complexity, while avoiding synchronization errors. The linkage design ensures consistent movement trajectories on both side supports, improving the smoothness and reliability of the movements, making it particularly suitable for nursing scenarios requiring frequent operations.

[0027] (2) Structural simplification and space optimization

[0028] By ingeniously utilizing the lever principle through an innovative crank-connecting rod combination, the linear motion of the telescopic device is transformed into the lifting and extension of the support plate. This design significantly reduces the number of mechanical components, making the overall structure more compact. More space is reserved under the central bed frame to facilitate the integration of other care functions (such as bedpan lifting and mattress flipping), and the bed's own weight lowers the barriers to transportation and installation.

[0029] The leg-split mechanism for the nursing bed described in this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0030] Figure 1 Front view of the leg-split mechanism for a nursing bed (with the first and second supports raised).

[0031] Figures 2-4 A schematic diagram of the leg-split mechanism for a nursing bed at different angles.

[0032] Figure 5 A schematic diagram illustrating the use of a leg-split mechanism in a nursing bed.

[0033] Among them, 1-first support plate, 2-second support plate, 3-first crank, 4-second crank, 5-first connecting rod, 6-second connecting rod, 7-telescopic device, 8-pull rod, 9-central bed frame, 10-fixed frame, 11-upright column, 12-crossbar. Detailed Implementation

[0034] like Figure 1-4As shown, a leg-spreading mechanism for a nursing bed includes a first support plate 1 and a second support plate 2 for lifting and separating the left and right legs; the middle of the lower bottom surface of the first support plate 1 is hinged to the upper end of a first crank 3, and the inner side of the lower bottom surface of the first support plate 1 is hinged to the upper end of a first connecting rod 5; the middle of the lower bottom surface of the second support plate 2 is hinged to the upper end of a second crank 4, and the inner side of the lower bottom surface of the second support plate 2 is hinged to the upper end of a second connecting rod 6; fixing blocks are fixed below the side beams on both sides of the central bed frame 9, and the lower ends of the first crank 3 and the second crank 4 are respectively fixed to the side beams on the left and right sides. The fixed blocks below the beam are hinged together; a fixed block is also fixed below the crossbeam located in the middle of the central bed frame 9; the middle part of the first connecting rod 5 is hinged to the fixed block located on the same side below the crossbeam, and the lower end of the second connecting rod 6 is hinged to the fixed block located on the same side below the crossbeam; a column 11 is fixed below the side beam on the left side of the central bed frame 9, the lower part of the column 11 is hinged to one end of the telescopic device 7, and the other end of the telescopic device 7 is hinged to the middle part of the second crank 4; the lower end of the first connecting rod 5 is hinged to one end of the pull rod 8, and the other end of the pull rod 8 is hinged to the middle part of the second connecting rod 6.

[0035] The lower end of the upright 11 is fixedly connected to the middle of the crossbar 12, and the left and right ends of the crossbar 12 are fixedly connected to the crossbeam in the middle of the central bed frame 9 through the fixing bracket 10. In other embodiments, an upright can also be set below the side beam on the right side of the central bed frame 9, and the installation positions of the other components can be reversed accordingly.

[0036] When the telescopic device 7 retracts, it pulls the second crank 4 to rotate inward and downward, thereby causing the second support plate 2 to fall. At the same time, the second connecting rod 6 is subjected to force and rotates inward, which in turn drives the first connecting rod 5 to rotate inward through the connecting rod 8. The first support plate 1 is subjected to force and falls. After the first support plate 1 and the second support plate 2 fall, they are on the same horizontal plane as the central bed frame 9.

[0037] When the telescopic device 7 extends, it pushes the second crank 4 to rotate outward and upward, thereby lifting the second support plate 2. At the same time, the second connecting rod 6 is forced to rotate outward, which in turn drives the first connecting rod 5 to rotate outward through the connecting rod 8, and the first support plate 1 is forced to lift obliquely upward.

[0038] There are two crossbeams in the middle of the central bed frame 9. When the first support plate 1 and the second support plate 2 are lowered, they are located between the two crossbeams. There are two fixing frames 10, which are fixedly connected to the bottom of the two crossbeams respectively.

[0039] There are two first connecting rods 5, arranged along the length of the central bed frame, both hinged to the inner lower surface of the first support plate 1. There are two second connecting rods 6, arranged along the length of the central bed frame, both hinged to the inner lower surface of the second support plate 2. The telescopic device 7 can be a cylinder, a hydraulic cylinder, or an electric push rod.

[0040] The use of the leg-split mechanism in a nursing bed is as follows: Figure 5 As shown.

[0041] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. They should not be construed as limitations on the present utility model. Any modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A leg diverter mechanism for a care bed, characterised in that: Includes a first support plate (1) and a second support plate (2) for lifting and separating the left and right legs; The middle part of the lower bottom surface of the first support plate (1) is hinged to the upper end of the first crank (3), the inner side of the lower bottom surface of the first support plate (1) is hinged to the upper end of the first connecting rod (5), the middle part of the lower bottom surface of the second support plate (2) is hinged to the upper end of the second crank (4), and the inner side of the lower bottom surface of the second support plate (2) is hinged to the upper end of the second connecting rod (6). Fixed blocks are fixed under the side beams on the left and right sides of the central bed frame (9). The lower ends of the first crank (3) and the second crank (4) are respectively hinged to the fixed blocks under the side beams on the left and right sides. A fixing block is also fixed below the crossbeam in the middle of the central bed frame (9); the middle part of the first connecting rod (5) is hinged to the fixing block located on the same side below the crossbeam, and the lower end of the second connecting rod (6) is hinged to the fixing block located on the same side below the crossbeam. A column (11) is fixed below the side beam on the left or right side of the central bed frame (9). The lower part of the column (11) is hinged to one end of the telescopic device (7), and the other end of the telescopic device (7) is hinged to the middle of the second crank (4). The lower end of the first connecting rod (5) is hinged to one end of the pull rod (8), and the other end of the pull rod (8) is hinged to the middle of the second connecting rod (6).

2. The leg rest mechanism for a care bed according to claim 1, characterized in that: When the telescopic device (7) retracts, the first support plate (1) and the second support plate (2) fall down and are on the same plane as the central bed frame (9).

3. The leg rest mechanism for a care bed according to claim 1, characterized by: When the telescopic device (7) extends, the first support plate (1) and the second support plate (2) are raised diagonally upward.

4. The leg rest mechanism for a care bed according to claim 1, characterized by: The central bed frame (9) has two crossbeams in the middle. When the first support plate (1) and the second support plate (2) are lowered, they are located between the two crossbeams.

5. The leg care bed according to claim 1, characterized in that: The telescopic device (7) is a cylinder, a hydraulic cylinder, or an electric push rod.

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