Adjustable passive flexion and extension device for lower limb rehabilitation training of old people

Abstract

The invention provides an adjustable passive flexion and extension device for lower limb rehabilitation training of old people, and relates to the technical field of lower limb rehabilitation, the adjustable passive flexion and extension device comprises a support rack, a leg fixing mechanism, a flexion and extension driving mechanism, an angle adjusting mechanism, a resistance control mechanism and an intelligent control module; by arranging an angle adjusting mechanism, the bending and stretching angle range of the lower limbs can be flexibly adjusted according to the height, leg length and rehabilitation requirements of the patients, the rehabilitation training device is suitable for the elderly patients of different body types, and the rehabilitation training requirements of the whole stage from the initial stage to the recovery stage are met; a resistance control mechanism and an intelligent control module are integrated, various training modes of constant speed, constant tension and constant length can be achieved, the requirements for training intensity in different rehabilitation stages are met by adjusting damping resistance and movement frequency, and muscle strength and joint flexibility are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of lower limb rehabilitation technology, and in particular to an adjustable passive flexion and extension device for lower limb rehabilitation training in the elderly. Background Technology

[0002] With the increasing aging of the population, the number of elderly patients with lower limb dysfunction is increasing year by year. Lower limb rehabilitation training is an important means to help the elderly regain their walking ability and improve their quality of life. Passive flexion and extension training, as a basic training method for lower limb rehabilitation, can effectively improve joint mobility, strengthen muscle strength, and prevent muscle atrophy and joint stiffness.

[0003] Current lower limb rehabilitation training devices on the market have many shortcomings: First, most devices have a fixed structure, making it impossible to adjust the training angle and range according to the patient's height, leg length, and rehabilitation stage, resulting in poor adaptability and difficulty in meeting the personalized needs of different elderly patients; second, traditional passive training devices mostly use a single driving method with a fixed training mode, making it impossible to flexibly adjust resistance and movement frequency according to the patient's rehabilitation progress, thus limiting the training effect; third, some devices lack intelligent control functions, making it impossible to monitor training data in real time, and medical staff cannot accurately grasp the patient's rehabilitation progress or adjust the training plan in a timely manner; in addition, existing devices are not comfortable, the leg fixation structure is poorly designed, and prolonged wear can easily lead to pressure sores, affecting patient training compliance.

[0004] Given the characteristics of elderly patients with weaker physical functions and longer rehabilitation periods, there is an urgent need to develop an adjustable, intelligent, and highly comfortable lower limb passive flexion and extension training device to improve the scientific nature and effectiveness of rehabilitation training and help elderly patients recover lower limb function more quickly. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable passive flexion and extension device for lower limb rehabilitation training in the elderly, thereby solving the aforementioned problems.

[0006] To address the aforementioned problems, this invention provides a technical solution: an adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly, comprising a support frame, a leg fixation mechanism, a flexion-extension drive mechanism, an angle adjustment mechanism, a resistance control mechanism, and an intelligent control module; the leg fixation mechanism is fixedly connected to the upper left side of the support frame; the flexion-extension drive mechanism is located in the middle of the support frame; the angle adjustment mechanism is located at the right end of the support frame; the resistance control mechanism is located inside the leg fixation mechanism; the intelligent control module is fixedly connected to the rear end of the support frame; the intelligent control module is electrically connected to the flexion-extension drive mechanism, the angle adjustment mechanism, and the resistance control mechanism.

[0007] Preferably, the support frame includes a base, columns, crossbeams, handrails, foot pedals, and casters; columns are fixedly connected to the four corners of the upper end of the base; crossbeams are fixedly connected to the top of the columns; handrails are fixedly connected to both sides of the front end of the crossbeams; foot pedals are fixedly connected to the front end of the base; and casters are fixedly connected to the four corners of the lower end of the base.

[0008] Preferably, the leg fixation mechanism includes a thigh fixation sleeve, a calf fixation sleeve, straps, Velcro, a hinge seat, and a connecting shaft; the right end of the thigh fixation sleeve is movably connected to the left end of the calf fixation sleeve via the connecting shaft; both the thigh fixation sleeve and the calf fixation sleeve have straps at their upper ends; one end of each strap is fixedly connected to Velcro; and the left end of the thigh fixation sleeve is fixedly connected to a hinge seat.

[0009] Preferably, the flexion-extension drive mechanism includes a drive motor, a reducer, a crank, a connecting rod, and a slider; the drive motor is fixedly connected inside the support frame; the reducer is fixedly connected to the output end of the drive motor; the crank is fixedly connected to the output end of the reducer; the connecting rod is movably connected to the other end of the crank via a pin; the slider is movably connected to the slider via a pin; and the slider is slidably connected to the lower end of the lower leg fixing sleeve.

[0010] Preferably, the angle adjustment mechanism includes an adjusting screw, an adjusting handle, a movable seat, and a supporting connecting rod; the right end of the support frame is threadedly connected to the adjusting screw; the right end of the adjusting screw is fixedly connected to the adjusting handle; the left end of the adjusting screw is movably connected to the movable seat via a bearing; the upper end of the movable seat is movably connected to one end of the supporting connecting rod via a pin; the other end of the supporting connecting rod is movably connected to the lower end of the lower leg fixing sleeve via a pin.

[0011] Preferably, the resistance control mechanism includes a hydraulic damper, an adjustment knob, a piston, and a piston rod; the hydraulic damper is fixedly connected inside the thigh fixation sleeve; the right end of the hydraulic damper is provided with an adjustment knob; the hydraulic damper is provided inside the hydraulic damper; the right end of the piston is fixedly connected with a piston rod; the right end of the piston rod is fixedly connected to the left end of the calf fixation sleeve.

[0012] Preferably, the intelligent control module includes a control box, a microcontroller, a button panel, a display screen, a motor drive unit, and a power module; the control box is fixedly connected to the rear end of the support frame; the microcontroller is fixedly connected inside the control box; the button panel and display screen are provided at the front end of the control box; the output terminal of the microcontroller is electrically connected to the motor drive unit; and the power module is fixedly connected inside the control box.

[0013] Preferably, the microcontroller has a built-in rehabilitation training program that can preset parameters such as flexion and extension angle, exercise frequency, and training duration; the display screen can display training angle, number of exercises, and remaining time data in real time.

[0014] Preferably, both the thigh fixation sleeve and the calf fixation sleeve have a sponge pad layer on their inner walls.

[0015] The beneficial effects of the present invention are: (1) Strong adaptability: By setting an angle adjustment mechanism, the range of lower limb flexion and extension angles can be flexibly adjusted according to the patient's height, leg length and rehabilitation needs, adapting to elderly patients of different body types and meeting the full-stage rehabilitation training needs from the initial stage to the recovery stage.

[0016] (2) Diverse training modes: It integrates resistance control mechanism and intelligent control module, which can realize multiple training modes such as isokinetic, isotonic and isometric. By adjusting the damping resistance and movement frequency, it can meet the training intensity requirements of different rehabilitation stages and effectively improve muscle strength and joint flexibility.

[0017] (3) Intelligent monitoring and management: The intelligent control module can collect and display data such as training angle, number of exercises, and training duration in real time. The built-in rehabilitation program can preset training parameters to realize personalized training plans, while facilitating remote monitoring and adjustment of training plans by medical staff.

[0018] (4) High comfort: The leg fixation mechanism adopts a flexible strap and sponge pad design to fit the curve of the leg and avoid compressing the skin. At the same time, it adopts an articulated structure to simulate the natural flexion and extension angle of the human lower limb, improving the comfort and safety of training.

[0019] (5) Easy to move: The bottom of the support frame is equipped with casters, which makes it easy to move the device between rehabilitation rooms, wards and other places, improving the flexibility of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the support frame of the present invention.

[0022] Figure 3 This is a schematic diagram of the leg fixation mechanism of the present invention.

[0023] Figure 4 This is a schematic diagram of the overall bending and stretching drive mechanism of the present invention.

[0024] Figure 5 This is a schematic diagram of the overall angle adjustment mechanism of the present invention.

[0025] Figure 6 This is a schematic diagram of the overall resistance control mechanism of the present invention.

[0026] Figure 7 This is a schematic diagram of the overall intelligent control module of the present invention.

[0027] Figure 8 This is an exploded view of the intelligent control module of the present invention.

[0028] 1-Support frame; 2-Leg fixation mechanism; 3-Flexion and extension drive mechanism; 4-Angle adjustment mechanism; 5-Resistance control mechanism; 6-Intelligent control module; 7-Base; 8-Column; 9-Crossbeam; 10-Handrail frame; 11-Foot pedal; 12-Universal caster; 13-Thigh fixation sleeve; 14-Lower leg fixation sleeve; 15-Strap; 16-Hook and loop fastener; 17-Hinge seat; 18-Connecting shaft; 19-Drive motor; 20-Reducer; 21-Crank; 22-Connecting rod; 23-Slider; 24-Adjusting screw; 25-Adjusting handle; 26-Moving seat; 27-Supporting connecting rod; 28-Hydraulic damper; 29-Adjusting knob; 30-Piston; 31-Piston rod; 32-Control box; 33-Microcontroller; 34-Button panel; 35-Display screen; 36-Motor drive unit; 37-Power module; 38-Sponge pad. Detailed Implementation

[0029] like Figures 1 to 8 As shown, this specific embodiment adopts the following technical solution: an adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly, including a support frame 1, a leg fixation mechanism 2, a flexion-extension drive mechanism 3, an angle adjustment mechanism 4, a resistance control mechanism 5, and an intelligent control module 6. The leg fixation mechanism 2 is fixedly connected to the upper left side of the support frame 1; the flexion-extension drive mechanism 3 is located in the middle of the support frame 1; the angle adjustment mechanism 4 is located below the leg fixation mechanism 2; the resistance control mechanism 5 is located inside the leg fixation mechanism 2; the intelligent control module 6 is fixedly connected to the rear end of the support frame 1; the intelligent control module 6 is electrically connected to the flexion-extension drive mechanism 3, the angle adjustment mechanism 4, and the resistance control mechanism 5.

[0030] like Figures 1 to 8 As shown, the support frame 1 includes a base 7, columns 8, crossbeams 9, handrails 10, foot pedals 11, and casters 12. Columns 8 are fixedly connected to the four corners of the upper end of the base 7. Crossbeams 9 are fixedly connected to the top of the columns 8. Handrails 10 are fixedly connected to both sides of the front end of the crossbeams 9. Foot pedals 11 are fixedly connected to the front end of the base 7. Casters 12 are fixedly connected to the four corners of the lower end of the base 7. The base 7 is welded from Q235 steel plate, providing a stable support foundation. Columns 8 are made of aluminum alloy square tubing, combining strength and lightweight characteristics. Casters 12 have a braking function for easy device fixation.

[0031] like Figures 1 to 8As shown, the leg fixation mechanism 2 includes a thigh fixation sleeve 13, a calf fixation sleeve 14, a strap 15, Velcro 16, a hinge seat 17, and a connecting shaft 18. The right end of the thigh fixation sleeve 13 is movably connected to the left end of the calf fixation sleeve 14 via the connecting shaft 18. Both the thigh fixation sleeve 13 and the calf fixation sleeve 14 are provided with straps 15 at their upper ends. One end of each strap 15 is fixedly connected to a Velcro 16. The left end of the thigh fixation sleeve 13 is fixedly connected to a hinge seat 17. The thigh fixation sleeve 13 and the calf fixation sleeve 14 are made of ABS plastic injection molding, which is lightweight and has good toughness. The strap 15 is made of nylon and is 5cm wide, ensuring fixation strength while improving comfort.

[0032] like Figures 1 to 8 As shown, the bending and extending drive mechanism 3 includes a drive motor 19, a reducer 20, a crank 21, a connecting rod 22, and a slider 23. The drive motor 19 is fixedly connected inside the support frame 1; the reducer 20 is fixedly connected to the output end of the drive motor 19; the crank 21 is fixedly connected to the output end of the reducer 20; the connecting rod 22 is movably connected to the other end of the crank 21 via a pin; the slider 23 is movably connected to the slider 23 via a pin; the slider 23 is slidably connected to the lower end of the lower leg fixing sleeve 14; the drive motor 19 is a 24V DC servo motor with a rated torque of 10 N·m; the reducer 20 is a planetary gear reducer with a reduction ratio of 1:20 to ensure stable output torque; the crank and connecting rod mechanism is made of 45 steel and the surface is hardened to improve wear resistance.

[0033] like Figures 1 to 8 As shown, the angle adjustment mechanism 4 includes an adjusting screw 24, an adjusting handle 25, a movable seat 26, and a supporting connecting rod 27. The right end of the support frame 1 is threadedly connected to the adjusting screw 24; the right end of the adjusting screw 24 is fixedly connected to the adjusting handle 25; the left end of the adjusting screw 24 is movably connected to the movable seat 26 via a bearing; the upper end of the movable seat 26 is movably connected to one end of the supporting connecting rod 27 via a pin; the other end of the supporting connecting rod 27 is movably connected to the lower end of the lower leg fixing sleeve 14 via a pin; the adjusting screw 24 adopts a T-type thread with a lead of 8mm, providing high adjustment accuracy; the supporting connecting rod 27 is a stainless steel round rod with a diameter of 20mm to ensure structural strength.

[0034] like Figures 1 to 8As shown, the resistance control mechanism 5 includes a hydraulic damper 28, an adjustment knob 29, a piston 30, and a piston rod 31. The hydraulic damper 28 is fixedly connected inside the thigh fixing sleeve 13. The right end of the hydraulic damper 28 is provided with an adjustment knob 29. The piston 30 is provided inside the hydraulic damper 28. The right end of the piston 30 is fixedly connected with a piston rod 31. The right end of the piston rod 31 is fixedly connected to the left end of the calf fixing sleeve 14. The hydraulic damper 28 is filled with silicone oil medium, and the damping force adjustment range is 5-50N. The adjustment knob 29 has scale markings for convenient and precise adjustment of the resistance.

[0035] like Figures 1 to 8 As shown, the intelligent control module 6 includes a control box 32, a microcontroller 33, a button panel 34, a display screen 35, a motor drive unit 36, and a power module 37. The control box 32 is fixedly connected to the rear end of the support frame 1. The microcontroller 33 is fixedly connected inside the control box 32. The button panel 34 and the display screen 35 are located at the front end of the control box 32. The output terminal of the microcontroller 33 is electrically connected to the motor drive unit 36. The power module 37 is fixedly connected inside the control box 32. The microcontroller 33 is an STM32F103 series microcontroller with a built-in 12-bit ADC acquisition module. The display screen 35 is a 3.5-inch TFT LCD screen with a resolution of 320×240. The power module 37 is a 220V to 24V switching power supply with an output power of 100W.

[0036] The usage state of this invention is as follows: During use, the patient sits in front of the device with both feet placed on the foot pedal 11, placing their thighs and calves into the thigh fixation sleeve 13 and calf fixation sleeve 14 respectively, and securing the legs with straps 15 and Velcro 16; medical personnel set training parameters, including flexion-extension angle, movement frequency, and training duration, through the button panel 34 of the intelligent control module 6; after starting the device, the drive motor 19 of the flexion-extension drive mechanism 3 drives the crank 21 to rotate through the reducer 20, and the crank 21 pushes the slider 23 to reciprocate through the connecting rod 22. The lower leg fixing sleeve 14 is driven to achieve passive flexion and extension movements; the angle adjustment mechanism 4 can rotate the adjustment handle 25 to drive the adjustment screw 24 to rotate, causing the moving seat 26 to move left and right, and the initial angle of the lower leg fixing sleeve 14 can be changed through the support link 27 to achieve adjustment of the flexion and extension range; the resistance control mechanism 5 can change the damping force of the hydraulic damper 28 by rotating the adjustment knob 29 to achieve adjustment of training intensity; during training, the intelligent control module 6 collects training data in real time and displays it on the display screen 35, and automatically generates a training report after training.

[0037] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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, they should not be construed as limiting this invention.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

[0040] The control method of this invention is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this invention is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

Claims

1. An adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly, characterized in that: It includes a support frame (1), a leg fixing mechanism (2), a flexion and extension drive mechanism (3), an angle adjustment mechanism (4), a resistance control mechanism (5), and an intelligent control module (6). The upper left side of the support frame (1) is fixedly connected to a leg fixing mechanism (2); The support frame (1) is provided with a bending and stretching drive mechanism (3) in the middle. An angle adjustment mechanism (4) is provided below the leg fixing mechanism (2); The leg fixing mechanism (2) is equipped with a resistance control mechanism (5). The rear end of the support frame (1) is fixedly connected to an intelligent control module (6). The intelligent control module (6) is electrically connected to the flexion-extension drive mechanism (3), the angle adjustment mechanism (4), and the resistance control mechanism (5).

2. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 1, characterized in that: The support frame (1) includes a base (7), a column (8), a crossbeam (9), a handrail (10), a foot pedal (11), and casters (12). The base (7) has four columns (8) fixedly connected to its upper end. A crossbeam (9) is fixedly connected to the top of the column (8); Handrails (10) are fixedly connected to both sides of the front end of the crossbeam (9). A foot pedal (11) is fixedly connected to the front end of the base (7); The base (7) is fixedly connected to four corners at the bottom with casters (12).

3. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 1, characterized in that: The leg fixing mechanism (2) includes a thigh fixing sleeve (13), a calf fixing sleeve (14), a strap (15), a Velcro strap (16), a hinge seat (17), and a connecting shaft (18). The right end of the thigh fixation sleeve (13) is movably connected to the left end of the calf fixation sleeve (14) via a connecting shaft (18); Both the thigh fixing sleeve (13) and the calf fixing sleeve (14) are provided with straps (15) at their upper ends. One end of the strap (15) is fixedly connected to a Velcro strap (16). The left end of the thigh fixation sleeve (13) is fixedly connected to a hinge seat (17).

4. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 1, characterized in that: The bending and stretching drive mechanism (3) includes a drive motor (19), a reducer (20), a crank (21), a connecting rod (22), and a slider (23). The support frame (1) is internally fixedly connected to a drive motor (19). The output end of the drive motor (19) is fixedly connected to a reducer (20). The output end of the reducer (20) is fixedly connected to a crank (21); The other end of the crank (21) is movably connected to the connecting rod (22) via a pin. The other end of the connecting rod (22) is movably connected to the slider (23) via a pin; The slider (23) is slidably connected to the lower end of the calf fixing sleeve (14).

5. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 1, characterized in that: The angle adjustment mechanism (4) includes an adjustment screw (24), an adjustment handle (25), a moving base (26), and a support link (27). The right end of the support frame (1) is threaded with an adjusting screw (24). An adjustment handle (25) is fixedly connected to the right end of the adjusting screw (24); The left end of the adjusting screw (24) is movably connected to the movable seat (26) via a bearing; The upper end of the movable seat (26) is movably connected to one end of the support rod (27) via a pin; The other end of the support rod (27) is movably connected to the lower end of the lower leg fixing sleeve (14) via a pin.

6. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 1, characterized in that: The resistance control mechanism (5) includes a hydraulic damper (28), an adjustment knob (29), a piston (30), and a piston rod (31). A hydraulic damper (28) is fixedly connected inside the thigh fixation sleeve (13). The hydraulic damper (28) is provided with an adjustment knob (29) at the right end; The hydraulic damper (28) is equipped with a piston (30). The piston (30) is fixedly connected to the right end of the piston rod (31). The right end of the piston rod (31) is fixedly connected to the left end of the lower leg fixing sleeve (14).

7. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 1, characterized in that: The intelligent control module (6) includes a control box (32), a microcontroller (33), a button panel (34), a display screen (35), a motor drive unit (36), and a power supply module (37). The control box (32) is fixedly connected to the rear end of the support frame (1); A microcontroller (33) is fixedly connected inside the control box (32); The control box (32) is equipped with a button panel (34) and a display screen (35) at the front end; The output terminal of the microcontroller (33) is electrically connected to a motor drive unit (36). The power module (37) is fixedly connected inside the control box (32).

8. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 7, characterized in that: The microcontroller (33) has a built-in rehabilitation training program that can preset parameters such as flexion and extension angle, movement frequency and training duration. The display screen (35) can display training angle, number of movements and remaining time data in real time.

9. The adjustable passive flexion-extension device for lower limb rehabilitation training in the elderly according to claim 3, characterized in that: Both the inner walls of the thigh fixation sleeve (13) and the calf fixation sleeve (14) are provided with a sponge pad layer (38).

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