Nursing bed

Abstract

The application discloses a nursing bed and relates to the field of medical devices. The nursing bed comprises a support bed frame and a lower limb rehabilitation mechanism. The lower limb rehabilitation mechanism has an adjusting assembly which moves relative to the support bed frame along a first direction. The adjusting assembly comprises a fixed base which moves relative to the support bed frame along the first direction, a support piece for fixing a lower limb, and a first connecting piece and a second connecting piece for connecting the fixed base and the support piece. The first connecting piece and the second connecting piece are respectively telescopic structures along the extension direction thereof, so as to adjust the angle of the support piece relative to the support bed frame and the distance between the fixed base and the support piece. The application can enable a user to perform lower limb training on the nursing bed, thereby effectively stimulating muscles, improving the range of joint movement, and reducing secondary functional degradation problems such as muscle strength decline, joint adhesion and blood circulation disorder.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more particularly to a nursing bed. Background Technology

[0002] In the fields of clinical nursing and rehabilitation medicine, long-term bedridden patients, especially those in the postoperative recovery period, those with neurological diseases, or the elderly and frail, often face the risk of complications such as muscle atrophy, joint stiffness, and deep vein thrombosis. To prevent these problems, early and regular lower limb functional exercises are crucial. Currently, most nursing beds on the market primarily focus on basic positional adjustment functions to meet patients' comfort or basic care needs. Their structural design typically only supports a wide range of positional adjustments, leaving the patient's lower limbs in a fixed or semi-fixed state for extended periods. This leads to a lack of effective muscle contraction stimulation, limited joint range of motion, and a high risk of secondary functional degeneration problems such as muscle weakness, joint adhesions, and circulatory disorders. Utility Model Content

[0003] The purpose of this application is to provide a nursing bed that allows users to perform lower limb training on the nursing bed, thereby effectively stimulating muscles, improving joint range of motion, and reducing secondary functional degeneration problems such as muscle weakness, joint adhesions, and blood circulation disorders.

[0004] To address the aforementioned technical problems, this application provides the following technical solutions:

[0005] The first aspect of this application provides a nursing bed, comprising:

[0006] Support bed frame;

[0007] The lower limb rehabilitation institution has an adjustment component that moves relative to the supporting bed frame along a first direction;

[0008] The adjustment components include:

[0009] A fixed base that moves relative to the supporting bed frame along a first direction;

[0010] Supports used to stabilize the lower limbs;

[0011] A first connector and a second connector are used to connect a fixed base and a support member. The first connector and the second connector are telescopic structures along their extension directions, respectively, to adjust the angle of the support member relative to the support bed frame and to adjust the distance between the fixed base and the support member.

[0012] In some modified embodiments of the first aspect of this application, the two ends of the support member are rotatably connected to the first connector and the second connector, respectively, and the two ends of the fixed base are rotatably connected to the first connector and the second connector, respectively. The first connector and the second connector rotate relative to the fixed base and the support member as the support member moves.

[0013] In some modified embodiments of the first aspect of this application, the lower limb rehabilitation mechanism further includes a drive component connected to an adjustment component for driving the adjustment component to move along a first direction.

[0014] In some modified embodiments of the first aspect of this application, the support bed frame is provided with a receiving groove, and the adjustment component is disposed in the receiving groove, which is capable of accommodating the lower limbs.

[0015] In some modified embodiments of the first aspect of this application, the driving component includes:

[0016] The first motor is installed inside the receiving slot;

[0017] The first rotating threaded rod is rotatably connected to the inner wall of the receiving groove via a rotating bearing. One end of the first rotating threaded rod is connected to the output end of the first motor. The first rotating threaded rod is rotatably connected to the fixed base, and the fixed base is slidably connected in the receiving groove.

[0018] In some modified embodiments of the first aspect of this application, the regulating component further includes:

[0019] The first mounting component is connected to the first connecting component via a first rotating shaft;

[0020] The second mounting component is connected to the second connecting component via a second rotating shaft;

[0021] The first and second mounting components are symmetrically arranged on both sides of the fixed base.

[0022] In some modified embodiments of the first aspect of this application, the first connector and the second connector are symmetrically arranged on both sides of the fixed base.

[0023] In some modified embodiments of the first aspect of this application, the regulating component further includes:

[0024] A soft pad is placed on the side of the support away from the fixed base;

[0025] Velcro, which is attached to the padding or support;

[0026] The strap has one end fixedly connected to the support, and the other end is fitted with Velcro to secure the lower limbs.

[0027] Some modified embodiments of the first aspect of this application also include:

[0028] The back adjustment mechanism has a first connector located on the side of the second connector near the back adjustment mechanism.

[0029] The back adjustment mechanism includes:

[0030] The second motor is installed inside the support bed frame;

[0031] The second rotating threaded rod is connected to the output end of the second motor.

[0032] The movable meniscus is threadedly connected to the second rotating threaded rod.

[0033] The lifting support column is rotatably connected to the movable meniscus.

[0034] The backrest is rotatably connected to the lifting support column on one side via a connector, and the backrest is rotatably connected to the support bed frame.

[0035] Some modified embodiments of the first aspect of this application also include:

[0036] Protective equipment, including:

[0037] Fixed guardrails are fixedly connected to one side of the bed frame support;

[0038] Rotate the guardrail, which is connected to the other side of the bed frame.

[0039] Compared to existing technologies, the nursing bed provided in the first aspect of this application, by setting two retractable first and second connecting members, allows the first and second connecting members to extend and retract as the lower limbs flex and extend along the first direction during the movement of the adjustment component. This enables the supporting member to adapt to the physiological curvature and rehabilitation needs of different patients' lower limbs, allowing patients to maintain a comfortable posture that meets rehabilitation goals during rehabilitation training. This enables multi-dimensional training in lifting, abduction, and adduction, allowing users to effectively train their lower limbs on the nursing bed, thereby stimulating muscles, improving joint range of motion, and reducing secondary functional degeneration problems such as muscle weakness, joint adhesions, and circulatory disorders. Attached Figure Description

[0040] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0041] Figure 1 A schematic diagram of the three-dimensional structure of a nursing bed is shown.

[0042] Figure 2 A schematic diagram of the structure of an adjustment assembly for a nursing bed is shown.

[0043] Figure 3 The illustration schematically shows the middle of a nursing bed. Figure 2 Enlarged view of point A;

[0044] Figure 4 A schematic diagram of a partial structure of a nursing bed is shown.

[0045] Figure 5 A schematic diagram of the structure of a nursing bed is shown.

[0046] Figure 6 This utility model proposes a translational nursing bed with a lower limb rehabilitation mechanism. Figure 5 Enlarged diagram of point B.

[0047] Explanation of icon numbers:

[0048] 1. Supporting bed frame; 11. Receiving slot; 2. Lower limb rehabilitation mechanism; 22. Drive assembly; 221. First motor; 222. First rotating threaded rod; 223. Rotating bearing; 23. Adjustment assembly; 231. First connector; 232. Straps; 233. Fixed base; 234. First mounting piece; 235. Second rotating shaft; 236. Third rotating shaft; 237. Support plate; 238. Soft pad; 239. Velcro; 240. Second mounting piece; 241. First rotating shaft; 242. Second connector; 3. Backrest adjustment mechanism; 31. Second motor; 32. Second rotating threaded rod; 33. Movable meniscus; 34. Lifting support column; 35. Fourth rotating shaft; 36. Backrest; 37. Connecting rotating column; 38. Fixed frame; 4. Protective mechanism; 41. Fixed guardrail; 42. Rotating guardrail; 5. Casters. Detailed Implementation

[0049] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0050] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure pertains.

[0051] In the fields of clinical nursing and rehabilitation medicine, long-term bedridden patients, especially those in the postoperative recovery period, those with neurological diseases, or the elderly and frail, often face the risk of complications such as muscle atrophy, joint stiffness, and deep vein thrombosis. To prevent these problems, early and regular lower limb functional exercises are crucial. Currently, most nursing beds on the market primarily focus on basic positional adjustment functions to meet patients' comfort or basic care needs. Their structural design typically only supports a wide range of positional adjustments, leaving the patient's lower limbs in a fixed or semi-fixed state for extended periods. This leads to a lack of effective muscle contraction stimulation, limited joint range of motion, and a high risk of secondary functional degeneration problems such as muscle weakness, joint adhesions, and circulatory disorders.

[0052] To address the aforementioned technical problems, this application provides a nursing bed that allows users to perform lower limb exercises, thereby effectively stimulating muscles, improving joint range of motion, and reducing secondary functional degeneration problems such as muscle weakness, joint adhesions, and impaired blood circulation.

[0053] Example 1

[0054] like Figure 1 and Figure 2 As shown, a nursing bed includes a supporting bed frame 1 and a lower limb rehabilitation mechanism 2. The lower limb rehabilitation mechanism 2 has an adjustment component 23, which moves relative to the supporting bed frame 1 along a first direction. The adjustment component 23 includes a fixed base 233 that moves relative to the supporting bed frame 1 along the first direction, a support member for fixing the lower limb, and a first connector 231 and a second connector 242 for connecting the fixed base 233 and the support member. The first connector 231 and the second connector 242 are telescopic structures along their extension directions, respectively, to adjust the angle of the support member relative to the supporting bed frame 1 and to adjust the distance between the fixed base 233 and the support member.

[0055] The supporting bed frame 1 is the basic structural framework of the nursing bed, used to support the weight of the entire bed, including the patient's weight, the mattress, and other additional functional components (such as guardrails, IV stands, lower limb rehabilitation mechanisms 2, etc.). It not only provides stable support but also serves as the installation foundation and mechanical load-bearing platform for other functional modules (such as electric lifting, body position adjustment, rehabilitation training devices, etc.). In the nursing bed with lower limb rehabilitation function described in this application, the supporting bed frame 1 can also possess sufficient structural strength and stability to ensure that it will not shake or deform during lower limb exercise training, guaranteeing safe use. The supporting bed frame 1 can be a metal bed frame, made of high-strength steel or aluminum alloy, with good load-bearing capacity, durability, and stability, suitable for various electric or manual nursing beds; the supporting bed frame 1 can also be a composite material bed frame, made of carbon fiber or engineering plastic composite materials, lightweight and corrosion-resistant. The supporting bed frame 1 can be a fixed bed frame, with a simple structure and no adjustment, mostly used in general hospital beds or short-term care scenarios. The supporting bed frame 1 can also be an adjustable bed frame, allowing for changes in bed height or angle via a hand-crank mechanism, suitable for environments without power. It can also be equipped with an electric push rod and control system, enabling various position adjustments such as bed surface lifting, backrest or legboard raising, and side turning, and is widely used in modern intelligent nursing beds. The support bed frame 1 can be a single welded or assembled structure with high stability, suitable for heavy-duty nursing beds; the support bed frame 1 can also be composed of multiple relatively movable parts (such as head section, middle section, and leg section), which, together with hinges and drive devices, can achieve multi-position adjustments, commonly found in multi-functional electric nursing beds. The support bed frame 1 can support the quick installation and disassembly of functional modules (such as the lower limb rehabilitation mechanism 2 in this application), facilitating maintenance and functional expansion. Universal casters 5 can be installed at the bottom of the support bed frame 1 for easy movement.

[0056] The lower limb rehabilitation mechanism 2 refers to a mechanical and control system integrated into or attached to a nursing bed, rehabilitation equipment, or medical device, specifically designed to assist or promote lower limb function recovery training for patients. Its core function is to guide the patient's lower limbs to complete regular movements through active or passive means, in order to maintain or improve joint range of motion, stimulate muscle contraction, and promote blood circulation, thereby preventing complications such as muscle atrophy, joint stiffness, and deep vein thrombosis caused by prolonged bed rest. In the nursing bed described in this application, the lower limb rehabilitation mechanism 2 achieves fixation and movement control of the patient's lower limbs through the adjustment component 23, enabling lower limb angle adjustment and reciprocating movement training without changing the patient's overall lying posture. It belongs to a bed-mounted passive or assisted active rehabilitation system.

[0057] The lower limb rehabilitation device 2 can be driven by a motor or other power source to induce cyclical movements in the patient's lower limbs without voluntary participation. This is suitable for patients in the early postoperative period, those with neurological dysfunction, or those with impaired consciousness. For example, angle and position adjustments can be achieved through retractable first and second connectors 242, enabling passive movement. The lower limb rehabilitation device 2 can also be equipped with force sensors and a feedback control system to provide assistance after detecting weak muscle force signals from the patient, encouraging active participation in training. The lower limb rehabilitation device 2 can also provide adjustable resistance for strengthening muscle training. Furthermore, the lower limb rehabilitation device 2 can utilize cylinders or hydraulic cylinders to provide gentle driving force, suitable for patients sensitive to force.

[0058] Adjustment component 23 is the core execution and control unit in the lower limb rehabilitation mechanism 2, used to achieve adjustability of the patient's lower limb position, angle, and movement trajectory in space. Its main function is to drive the support fixed to the lower limb to perform controllable reciprocating or static adjustments through the relative movement of the mechanical structure, thereby completing flexion and extension training of joints such as hip, knee, and ankle, and promoting muscle activation and blood circulation. Adjustment component 23 can adjust angle and position simultaneously to achieve compound movements. Through the combination of telescopic connectors and movable base, at least two degrees of freedom are achieved: the connectors extend and retract, the support angle changes (simulating flexion and extension movements), the base moves along the bed frame, and the support position is adjusted forward and backward (avoiding compression and extending the stroke). It is a typical planar two- or three-degree-of-freedom mechanism, suitable for complex rehabilitation needs. Adjustment component 23 can use rigid rods hinged together to form a kinematic chain, and change the overall configuration by driving the length or angle of the rods. For example, the first connector 231 and the second connector 242 in this application are double telescopic linkage structures. The fixed base 233 is mounted on the bed frame's guide rails and can move linearly via a motor, hydraulic cylinder, or manually. Alternatively, a pneumatic or hydraulic cylinder can be used as a telescopic connector to directly provide push-pull force; the force is gentle and suitable for sensitive patients.

[0059] The fixed base 233 is the basic platform in the lower limb rehabilitation mechanism 2 used to connect the supporting bed frame 1 with the upper moving parts (such as support members and connectors). Its core function is to serve as an intermediate carrier for force transmission and a reference point for movement adjustment. In the nursing bed described in this application, the fixed base 233 is not absolutely "fixed," but rather refers to its relatively stable installation base during movement, used to bear and transmit forces and movements from the retractable connectors. The fixed base 233 is the proximal hinge point or mounting fulcrum of the first connector 231 and the second connector 242. The fixed base 233 can move relative to the supporting bed frame 1 (such as sliding or translating) along a first direction (which can be the extension direction of the nursing bed). The fixed base 233 can also serve as the mechanical anchor point of the entire adjustment assembly 23, bearing the reaction force generated during lower limb movement. Its position can be adjusted through guide rails, sliders, or drive mechanisms, thereby expanding the range of motion for lower limb training. The fixed base 233 can be installed on the guide rail or slide groove of the supporting bed frame 1, and can slide linearly along the length direction of the bed (first direction). It can be equipped with sliders, rollers, or linear bearings to reduce frictional resistance. The fixed base 233 can also be a lifting structure, which can adjust the height in the vertical direction, suitable for patients of different body types or special rehabilitation positions. The fixed base 233 can be a flat plate or frame structure, with multiple mounting holes for connecting the first and second connecting parts 242. It can be made of common metal plates (such as steel plates and aluminum alloys), which are high in strength and easy to process. The fixed base 233 can also be a closed or semi-closed structure with a certain volume, which can be used to build a motor, reducer, or control system. The fixed base 233 can be a three-dimensional frame welded or assembled from multiple rods, which is lightweight and has good rigidity. The first connecting part 231 and the second connecting part 242 can be connected to the base through pins or spherical bearings, allowing for angle changes. The first connecting part 231 and the second connecting part 242 can also be fixed to the base as a whole, without relative rotation, for static support scenarios.

[0060] The support component is a key part of the lower limb rehabilitation device 2 that directly contacts the patient's lower limb and provides fixation, support, and motion transmission. Its core function is to stably fix the patient's lower limb (such as the calf, foot, or thigh) and convert the mechanical motion generated by the adjustment component 23 (through connectors and base) into flexion and extension movements of the lower limb joints, thereby completing passive or assisted active rehabilitation training. The support component provides a reliable limb fixation interface to prevent slippage or misalignment during training; it can also transmit the pushing and pulling forces from the first and second connectors 242, driving lower limb movement, maintaining biomechanical alignment of the lower limb during movement, avoiding injury caused by abnormal stress, balancing comfort and safety, reducing local pressure, and preventing pressure sores or nerve damage. The support component can support the posterior side of the calf and is fixed by straps 232 or a sheath, suitable for knee flexion and extension training. The support component can be a bracket-type structure, with an arc-shaped support plate made of rigid metal or engineering plastic that conforms to the limb contour. It can be equipped with soft pads 238 (such as sponges or gel pads) to enhance comfort, is easy to clean and disinfect, and is suitable for clinical use. The support can also be a strap 232 structure, using adjustable fabric straps 232 (such as Velcro or elastic bands) to secure the limb to the connecting rod. The support can also be a sleeve or clamp-like structure, similar to a brace design, wrapping around the entire lower leg or foot to provide all-around fixation, and can integrate an airbag pressurization system to enhance fit and stability. The angle between the support and the first connecting member 231 and the second connecting member 242 can be adjusted via slots, bolts, or an electric mechanism to accommodate different heights or rehabilitation stages.

[0061] The first connecting member 231 and the second connecting member 242 are the core transmission components of the adjusting assembly 23, used to connect the fixed base 233 and the support member, forming a linkage mechanism with a variable geometry. Their core function is to change the spatial position and angle of the support member relative to the support bed frame 1 through active or controllable extension and retraction of their own length, thereby driving the patient's lower limbs to complete flexion and extension rehabilitation movements. The first connecting member 231 and the second connecting member 242 can be passively telescopic structures, such as telescopic sleeves or telescopic rods, passively extending and retracting with the flexion and extension of the lower limbs to adapt to the tilt angle of the lower limbs; for example, during the adduction of the lower limbs, the first connecting member 231 can relatively extend while the second connecting member 242 can relatively compress, thereby adapting to the tilt angle of the lower limbs. The first connecting member 231 and the second connecting member 242 can also be active telescopic structures, such as electric push rods, driven by a motor to extend or retract a lead screw or ball screw, offering advantages such as high precision, programmability, and strong self-locking. They can achieve constant speed, variable speed, fixed stroke, and timed control modes, making them particularly suitable for scenarios requiring programmed rehabilitation training. Alternatively, the first connecting member 231 and the second connecting member 242 can be hydraulic cylinders, using liquid pressure to drive the piston rod's extension and retraction, providing high output force and smooth movement, suitable for heavy loads. They can also be pneumatic cylinders, driven by compressed air, offering gentle movements, fast response, low cost, and simple maintenance, suitable for early rehabilitation training sensitive to force. The first connecting member 231 and the second connecting member 242 can be installed in parallel, allowing for translation of the support component during synchronous extension and retraction, and angle adjustment during differential extension, resulting in a symmetrical structure and balanced force distribution.

[0062] The first connecting member 231 and the second connecting member 242 can also be magnetically connected to the support member, ensuring that the first connecting member 231 and the second connecting member 242 remain in contact with the support member during lifting and lowering, and reducing stress and interference on the support member. The first connecting member 231 and the second connecting member 242 can also be movably connected to the support member, allowing the connecting member to drive the support member to complete angular changes during extension and retraction. For example, the first connecting member 231 and the second connecting member 242 can be hinged with a pin, with an ear plate or hinge seat provided on the support member. The ends of the first and second connecting members 242 are rotatably connected by inserting a cylindrical pin into the ear plate hole. This structure is simple, low-cost, and allows for flexible rotation, enabling single-degree-of-freedom rotation (around the pin center). Self-lubricating bearings (such as oil-impregnated copper bushings or needle roller bearings) can be used to reduce wear, and cotter pins or retaining rings can be added to prevent the pin from sliding out axially. Alternatively, the first connecting member 231 and the second connecting member 242 can be connected to the support member by a ball joint hinge, with the end of the connecting member being a ball head that inserts into a ball socket on the support member, allowing for multi-directional oscillation within a certain range. It provides multi-degree-of-freedom spatial motion, adapts to complex trajectories, and can absorb minor assembly errors. The first connecting piece 231 and the second connecting piece 242 are connected to the universal joint of the support member, and the angle transmission between the two shafts is realized through the cross shaft structure, which is suitable for transmitting torque or large-angle deflection.

[0063] The nursing bed provided in this application is equipped with two retractable first connecting members 231 and second connecting members 242. When the adjustment component 23 moves along the first direction, the first connecting members 231 and second connecting members 242 extend and retract with the flexion and extension of the lower limbs as the support moves. This allows the support to adapt to the physiological curvature and rehabilitation needs of different patients' lower limbs, enabling patients to maintain a comfortable posture that meets rehabilitation goals during rehabilitation training. It achieves multi-dimensional training of lifting, abduction, and adduction, allowing users to effectively train their lower limbs on the nursing bed. This stimulates muscles, increases the range of motion of joints, effectively improves the mobility of patients' lower limb joints, promotes muscle strength recovery, avoids damage caused by overtraining, and reduces secondary functional degeneration problems such as muscle weakness, joint adhesion, and blood circulation disorders.

[0064] like Figure 2 and Figure 3 As shown, in some modified embodiments of this application, the two ends of the support member are rotatably connected to the first connector 231 and the second connector 242, respectively, and the two ends of the fixed base 233 are rotatably connected to the first connector 231 and the second connector 242, respectively. The first connector 231 and the second connector 242 rotate relative to the fixed base 233 and the support member as the support member moves.

[0065] The two ends of the fixed base 233 are rotatably connected to the first connecting member 231 and the second connecting member 242 in the same way as the two ends of the support member. For example, they can be connected via a third pivot 236 (pin), ball joint, or universal joint. The sequentially rotatably connected support member, first connecting member 231, fixed base 233, and second connecting member 242 can form a planar four-bar linkage, similar to a flexible parallelogram mechanism. When the first and second connecting members 242 extend and retract synchronously, the support member achieves translation or small-angle tilting. When the two connecting members extend and retract differentially (one extends and the other retracts), the support member rotates, simulating the flexion and extension of the knee joint. The movement trajectory is close to the natural movement arc of the human lower limb, reducing shear force and abnormal stress. All connections are rotatable, allowing each component to automatically adjust its relative angle during movement, avoiding mechanism jamming or local stress concentration caused by rigid connections. This is particularly suitable for rehabilitation training scenarios involving long-term reciprocating movements. The first and second connectors 242 are not only force transmitters but also motion drivers. When the support is subjected to external forces (such as slight active force exerted by the patient), the connectors can provide cushioning or feedback assistance through extension and contraction, supporting assisted active training modes. Smooth and continuous flexion and extension movements can more effectively stimulate muscle contraction, promote venous return, and significantly reduce the risk of deep vein thrombosis (DVT) and muscle atrophy. The rotating connection allows for minor misalignment compensation, avoiding the application of torsional torque to the knee and ankle joints, and protecting joint stability in postoperative or nerve-damaged patients. By adjusting the extension and contraction stroke and initial angle of the connectors, it can accommodate patients with different leg lengths and weights, improving the versatility of the device.

[0066] like Figure 1 and Figure 2 As shown, in some modified embodiments of this application, the lower limb rehabilitation mechanism 2 further includes a drive component 22, which is connected to the adjustment component 23 and is used to drive the adjustment component 23 to move along a first direction.

[0067] The drive assembly 22 is the key actuator for realizing the overall displacement of the adjustment assembly 23, allowing the fixed base 233 to slide along the length direction (first direction) of the bed, thereby changing the initial position and range of motion of the support. The drive assembly 22 can be a lead screw-nut assembly, where a motor drives the lead screw to rotate, causing the nut (connected to the fixed base 233) to move linearly. This provides high precision, good self-locking, and low noise; suitable for slow, smooth movement in high-end intelligent nursing beds. The drive assembly 22 can also be a synchronous belt-pulley transmission structure, where a motor drives the synchronous belt, with the belt clamp fixed to the fixed base 233. This provides high speed, long stroke, and simple maintenance. The drive assembly 22 can also be a linear motor drive structure, directly generating linear thrust without intermediate conversion mechanisms, offering fast response, extremely high precision, and a compact structure. The drive assembly 22 can also be a hydraulic or pneumatic cylinder drive structure, utilizing fluid pressure to push the piston rod, resulting in high output force and smooth movement.

[0068] like Figure 1 As shown, in some modified embodiments of this application, the support bed frame 1 is provided with a receiving groove 11, and the adjustment component 23 is disposed in the receiving groove 11, which can accommodate the lower limbs.

[0069] The receiving groove 11 is a recessed space structure on the supporting bed frame 1, which can be located in the foot area or the corresponding section of the lower limbs of the bed. Its shape is adapted to the contour of the human lower limbs, and it is a long strip, arc, or U-shaped groove. The groove of the receiving groove 11 can run through both sides of the bed frame or only be set on one side, depending on the specific layout. The adjustment component 23 (including the fixed base 233, the first connector 231, the second connector 242, the support component, etc.) is fully or partially embedded in the groove. The drive component 2222 (such as the lead screw, guide rail, motor, etc.) can also be arranged at the bottom or side wall of the groove. The support component can move up and down or back and forth in the groove to drive the lower limbs to complete flexion and extension training. A removable cover or flexible protective cover can be provided on the top of the receiving groove 11 for dust prevention and pinch prevention.

[0070] The receiving slot 11 can conceal the originally exposed adjustment components 23 within the bed frame, achieving "mechanical embedding" and avoiding the risk of bumps and knocks from exposed parts. It also saves space, improves neatness, eliminates the obtrusiveness of external attachments, and makes the nursing bed more streamlined, facilitating ward layout and daily cleaning. The receiving slot 11 enhances safety, preventing patients or caregivers from accidentally touching moving parts and reducing safety hazards such as pinching and tripping; it is especially suitable for unconscious or agitated patients. The contour of the receiving slot 11 conforms to the natural posture of the lower limbs, reducing the feeling of limbs being suspended and improving bed comfort. Temperature control, ventilation, or pressure monitoring systems can also be installed within the receiving slot 11 to further enhance the rehabilitation experience.

[0071] like Figure 2 As shown, in some modified embodiments of this application, the drive assembly 22 includes a first motor 221 and a first rotating threaded rod 222. The first motor 221 is disposed in the receiving groove 11. The first rotating threaded rod 222 is rotatably connected to the inner wall of the receiving groove 11 through a rotating bearing 223. One end of the first rotating threaded rod 222 is connected to the output end of the first motor 221. The first rotating threaded rod 222 is rotatably connected to the fixed base 233, and the fixed base 233 is slidably connected in the receiving groove 11.

[0072] The first motor 221 provides the power source, converting electrical energy into rotational motion. It is typically a DC servo motor or stepper motor, capable of precisely controlling speed and position. The first rotating threaded rod 222, or lead screw, has threads machined on its surface; its rotational motion is converted into linear motion through its engagement with the fixed base 233. Rotary bearings 223 are installed at both ends of the inner wall of the receiving groove 11 to support the threaded rod and allow it to rotate freely, reducing friction and vibration. During the start-up phase, the control system issues a command, the first motor 221 starts, and the output shaft begins to rotate, driving the first rotating threaded rod 222 to rotate synchronously via a coupling. During the transmission phase, the rotating threaded rod generates axial force through the nut inside the fixed base 233 that meshes with it.

[0073] Because the fixed base 233 is restricted to sliding only in the first direction by the guide rail, it moves linearly (forward or backward) along the axis of the threaded rod under the action of the thread. The forward or reverse movement of the base can be achieved by controlling the direction of the motor, the movement speed can be adjusted by controlling the motor speed, and the movement distance can be precisely controlled by controlling the number of rotations of the motor (achieving positioning function). The threaded drive has good repeatability and is suitable for rehabilitation training requiring precise stroke control (such as CPM angle adjustment). Ordinary trapezoidal screws or ball screws can maintain their position after power failure, preventing base slippage due to gravity or external forces and improving safety.

[0074] like Figure 2 and Figure 3 As shown, in some modified embodiments of this application, the adjustment component 23 further includes a first mounting member 234 and a second mounting member 240. The first mounting member 234 is connected to the first connecting member 231 via a first rotating shaft 241, and the second mounting member 240 is connected to the second connecting member 242 via a second rotating shaft 235. The first mounting member 234 and the second mounting member 240 are symmetrically arranged on both sides of the fixed base 233.

[0075] The first mounting component 234 and the second mounting component 240 are independent structural components fixed to both sides of the fixed base 233, used to support and connect the first connecting component 231 and the second connecting component 242, and can be regarded as a connection interface module or a hinge support. For example, the first mounting component 234 and the second mounting component 240 can be a set of mounting plates or ear plates, including two plate-like structures symmetrically distributed on the other two sides of the fixed base 233, that is, four mounting plates symmetrically distributed around the fixed base 233. The first mounting component 234 and the second mounting component 240 can be an L-shaped structure, with the vertical part fixed to the side of the fixed base 233 and the horizontal part having through holes for mounting the rotating shaft, which is simple in structure and has good rigidity. The first mounting component 234 and the second mounting component 240 can be U-shaped ear plates, with coaxial holes on both sides for inserting the rotating shaft, which can overlap with the ear plates of the connecting component to improve the connection strength. The symmetrical arrangement balances the forces on both sides of the connecting parts, avoiding the twisting of the fixed base 233 or the jamming of the guide rail caused by unilateral load. The mounting parts are relatively independent components and can be processed, replaced or upgraded individually (such as replacing the support with a different hole spacing), which facilitates maintenance and mass production. The mounting parts can be designed as outward-extending arm-like structures to keep the connecting parts away from the center line of the bed and avoid collisions between the left and right connecting parts during movement.

[0076] In some modified embodiments of this application, the first connector 231 and the second connector 242 are symmetrically arranged on both sides of the fixed base 233.

[0077] The first connector 231 and the second connector 242 are respectively installed on the left and right sides of the fixed base 233, in a mirror image arrangement. The installation height, angle, spacing, and direction of movement of the two connectors are consistent or corresponding, forming a symmetrical dual-side drive system, symmetrically arranged around the centerline of the fixed base 233. Both sides are subjected to force synchronously, avoiding unilateral load-bearing that could cause twisting of the fixed base 233, guide rail jamming, or bed frame deformation; this is especially suitable for heavy patients or high-frequency reciprocating motion scenarios. The smooth movement reduces vibration and shaking. The symmetrical layout counteracts lateral imbalance forces, ensuring that the support components run smoothly along a predetermined trajectory during flexion and extension, improving patient comfort. It enhances the physiological adaptability of rehabilitation training, simulating the natural state of symmetrical force exertion by bilateral muscle groups, making the force on the lower limbs closer to the physiological pattern, and avoiding abnormal joint stress caused by unilateral traction.

[0078] like Figure 2 and Figure 3 As shown, in some modified embodiments of this application, the adjustment component 23 further includes a soft pad 238, a Velcro 239, and a strap 232. The soft pad 238 is disposed on the side of the support away from the fixed base 233. The Velcro 239 is disposed on the soft pad 238 or the support. One end of the strap 232 is fixedly connected to the support, and the other end of the strap 232 partially cooperates with the Velcro 239 to fix the lower limb.

[0079] A soft pad 238 is positioned on the side of the support member away from the fixing base 233 (i.e., the side facing the patient's lower limb), providing cushioning and comfortable support, reducing local pressure, and preventing skin abrasion, pressure sores, or nerve compression; it can be made of high-density sponge, gel, memory foam, or breathable fabric. A hook and loop fastener 239 is positioned on the surface of the soft pad 238 or on the support member itself as a reusable fastening interface, used to cooperate with the strap 232 for quick fixation and release. The hook and loop fastener 239 consists of a hook side and a loop side. The hook side can be provided on the surface of the soft pad 238 or on the support member itself to cooperate with the strap 232, or the loop side can be provided, with the hook side positioned on the strap 232. One end of the strap 232 is fixedly connected to the support member, and the other end is a free end with a hook and loop fastener 239 (loop or hook side) for wrapping around the patient's lower limb (such as the calf or ankle). Tightness adjustment and reliable fixation are achieved by adhering to the hook and loop fastener 239. The combination of strap 232 and Velcro 239 provides adjustable restraint, ensuring that the lower limbs will not shift or fall off during passive movement, thus guaranteeing training safety. Velcro 239 can be operated with one hand without knotting, making it convenient for caregivers to put on and take off the straps for patients; it can also be quickly untied in an emergency.

[0080] like Figure 4 , Figure 5 and Figure 6 As shown, in some modified embodiments of this application, a back adjustment mechanism 3 is also included. A first connecting member 231 is disposed on the side of the second connecting member 242 near the back adjustment mechanism 3. The back adjustment mechanism 3 includes a second motor 31, a second rotating threaded rod 32, a movable meniscus 33, a lifting support column 34, and a backrest 36. The second motor 31 is disposed inside the support bed frame 1. The second rotating threaded rod 32 is connected to the output end of the second motor 31. The movable meniscus 33 is threadedly connected to the second rotating threaded rod 32. The lifting support column 34 is rotatably connected to the movable meniscus 33. One side of the backrest 36 is rotatably connected to the lifting support column 34 through a connecting member, and the backrest 36 is rotatably connected to the support bed frame 1.

[0081] The second motor 31 is installed inside the supporting bed frame 1 and serves as the power source for backrest adjustment. It can be a DC servo or stepper motor, possessing precise control capabilities. The second rotating threaded rod 32 is connected to the output end of the second motor 31, converting rotational motion into linear displacement; it drives the linear motion of the movable meniscus 33 via a thread. The movable meniscus 33 is an arc-shaped or semi-circular slider that is threadedly engaged with the second rotating threaded rod 32 and moves axially when the threaded rod rotates; it serves as the driving base for the lifting support column 34. One end of the lifting support column 34 is rotatably connected to the movable meniscus 33 (e.g., via a pin), and the other end can be rotatably connected to the backrest 36 via a fourth rotating shaft 35. When the movable meniscus 33 rises or falls, it pushes the backrest to rotate around the hinge point, thereby raising or lowering the backrest. The backrest 36 supports the patient's upper body. One side of it is hinged to the lifting support column 34 via a connector, and the other side is rotatably connected to the supporting bed frame 1 (e.g., via a hinge), forming a "four-bar linkage backrest adjustment mechanism". A fixed frame 38 can be installed on the supporting bed frame 1, and the backrest 36 can be rotatably connected to the mounting frame via a connecting rotating column 37.

[0082] The second motor 31 starts, driving the second rotating threaded rod 32 to rotate. Since the movable meniscus 33 is restricted to sliding back and forth along the guide rail and cannot rotate with the screw, it moves forward or backward along the length of the bed under the action of the thread. When the movable meniscus 33 slides forward (towards the head of the bed), it pushes or pulls the lifting support column 34 hinged to it. The tilt angle of the support column changes, and its top moves upward, lifting the lower part of the backrest 36. The backrest rotates forward around its fixed hinge point at the top, achieving back elevation. When the movable meniscus 33 slides backward (towards the foot of the bed), the support column pulls back or releases pressure, and the backrest 36 slowly falls back to a horizontal position under the action of gravity or a damping device. The lifting support column 34 can be a telescopic structure to reduce geometric constraints, increase the maximum elevation angle, and meet the different lying and sitting needs of patients. The second threaded rod is horizontally arranged within the bed frame interlayer, without occupying space below or above the bed, making it suitable for low-bed designs and improving structural stability. The horizontal transmission system has a low center of gravity, runs smoothly, and has strong resistance to lateral forces. The first connector 231 is located on the side of the second connector 242 near the backrest adjustment mechanism 3, so that the first connector 231 and the second connector 242 are arranged along the length of the bed or the direction in which the user lies, facilitating the coordination between the support components and the lower limbs.

[0083] like Figure 1As shown, in some modified embodiments of this application, a protective mechanism 4 is also included. The protective mechanism 4 includes a fixed guardrail 41, which is fixedly connected to one side of the supporting bed frame 1; and a rotating guardrail 42, which is rotatably connected to the other side of the supporting bed frame 1. The rotating guardrail 42 can be opened and closed according to the patient's needs for getting in and out of bed, and is closed when the patient is using the bed. In conjunction with the fixed guardrail 41, it ensures the patient's safety from both sides, prevents accidental falls, and ensures the patient's safety and comfort throughout the rehabilitation process.

[0084] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A nursing bed, characterized in that, include: Support bed frame (1); A lower limb rehabilitation device (2) having an adjustment component (23) that moves relative to the support bed frame (1) along a first direction; The adjustment component (23) includes: A fixed base (233) that moves relative to the supporting bed frame (1) along the first direction; Supports used to stabilize the lower limbs; A first connector (231) and a second connector (242) for connecting the fixed base (233) and the support member, the first connector (231) and the second connector (242) being retractable structures along their extension directions to adjust the angle of the support member relative to the support bed frame (1) and to adjust the distance between the fixed base (233) and the support member.

2. The nursing bed according to claim 1, characterized in that, The two ends of the support member are rotatably connected to the first connector (231) and the second connector (242) respectively. The two ends of the fixed base (233) are rotatably connected to the first connector (231) and the second connector (242) respectively. The first connector (231) and the second connector (242) rotate relative to the fixed base (233) and the support member as the support member moves.

3. The nursing bed according to claim 1, characterized in that, The lower limb rehabilitation mechanism (2) further includes a drive component (22), which is connected to the adjustment component (23) and is used to drive the adjustment component (23) to move along a first direction.

4. The nursing bed according to claim 3, characterized in that, The support bed frame (1) is provided with a receiving groove (11), and the adjustment component (23) is disposed in the receiving groove (11), which can accommodate the lower limbs.

5. The nursing bed according to claim 4, characterized in that, The driving component (22) includes: The first motor (221) is disposed in the receiving groove (11); The first rotating threaded rod (222) is rotatably connected to the inner wall of the receiving groove (11) via a rotating bearing (223). One end of the first rotating threaded rod (222) is connected to the output end of the first motor (221). The first rotating threaded rod (222) is rotatably connected to the fixed base (233), and the fixed base (233) is slidably connected in the receiving groove (11).

6. The nursing bed according to claim 5, characterized in that, The adjustment component (23) also includes: A first mounting component (234) is connected to the first connector (231) via a first pivot (241); The second mounting member (240) is connected to the second connector (242) via the second pivot (235); The first mounting component (234) and the second mounting component (240) are symmetrically arranged on both sides of the fixed base (233).

7. The nursing bed according to claim 1, characterized in that, The first connector (231) and the second connector (242) are symmetrically arranged on both sides of the fixed base (233).

8. The nursing bed according to claim 1, characterized in that, The adjustment component (23) also includes: A soft pad (238) is disposed on the side of the support member away from the fixed base (233); Velcro (239) is provided on the cushion (238) or the support member; A strap (232) is provided, one end of which is fixedly connected to the support member, and the other end of which is engaged with the Velcro (239) to fix the lower limb.

9. The nursing bed according to claim 1, characterized in that, Also includes: The back adjustment mechanism (3) has the first connector (231) disposed on the side of the second connector (242) near the back adjustment mechanism (3); The back adjustment mechanism (3) includes: The second motor (31) is disposed inside the support bed frame (1); The second rotating threaded rod (32) is connected to the output end of the second motor (31); A movable meniscus (33) is threadedly connected to the second rotating threaded rod (32); A lifting support column (34) is rotatably connected to the movable meniscus (33); The backrest (36) is rotatably connected to the lifting support column (34) on one side via a connector, and the backrest (36) is rotatably connected to the support bed frame (1).

10. The nursing bed according to claim 1, characterized in that, Also includes: Protective mechanism (4), the protective mechanism (4) comprising: Fixed guardrail (41), the fixed guardrail (41) is fixedly connected to one side of the supporting bed frame (1); Rotate guardrail (42), which is rotatably connected to the other side of the support bed frame (1).

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