Posture correction device for ankle joint of hemiplegic patient

Abstract

The invention discloses a posture correcting device for ankle joints of a hemiplegic patient, and relates to the technical field of medical instruments, and the posture correcting device is characterized by comprising a foot support, a foot supporting frame is arranged on the foot support, a foot bandage is arranged on the foot supporting frame, a supporting fixing frame is arranged on the foot support, a connecting frame is arranged on the supporting fixing frame, and a connecting rod is arranged on the connecting frame. A connecting frame is arranged on the foot supporting frame, a shank supporting upper face is arranged on the connecting frame, a shank bandage is arranged on the shank supporting upper face, an angle adjusting mechanism is arranged between the connecting frame and the foot supporting frame, and an air bag adjusting mechanism is arranged on the foot support. Ankle joint deformity such as foot drop, abnormal muscular tension and strephenopodia / valgus of a hemiplegic patient can be corrected in all directions through the angle adjusting mechanism and the air bag adjusting mechanism, meanwhile, the intelligent control system can automatically regulate and control the air bag pressure and broadcast the state through voice, stress balance and use safety are guaranteed, and the device is convenient to operate as a whole and high in practicability. The device is suitable for family rehabilitation and professional training and meets the rehabilitation and daily auxiliary requirements of patients.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a posture correction device for the ankle joint of a hemiplegic patient. Background Technology

[0002] Due to damage to the central nervous system, hemiplegic patients often experience abnormal muscle tone and impaired nerve control function in the muscles around the ankle joint, making them prone to typical postural deformities such as foot drop, inversion, and eversion. These deformities not only severely affect the patient's ability to walk independently and control their balance, but may also lead to complications such as gait abnormalities, joint contractures, and pressure sores, hindering the rehabilitation process. Therefore, continuous and effective correction of ankle joint posture is a key aspect of rehabilitation treatment and is of great significance for improving the patient's motor ability and quality of life.

[0003] Currently, the ankle-foot orthosis (AFO) commonly used in clinical practice has the following limitations: (1) Single function, difficult to take into account multi-dimensional correction: Most traditional orthotics either only fix foot drop by dorsiflexion or try to correct inversion / outversion through simple three-point mechanical principle, lacking an integrated device that can independently and accurately intervene in sagittal and coronal plane deformities at the same time. (2) Inconvenient adjustment and rigid fixation: Angle adjustment often uses hole-type pins or rough hinges, which have limited adjustment range and low precision, and cannot achieve dynamic fine adjustment during treatment. Correction of inversion and vara often relies on physical shaping or fixed pads, which cannot achieve active and reversible pressure adjustment; (3) Passive fixation and lack of intelligent interaction: Most existing devices are passive support structures and cannot adaptively adjust according to the patient's real-time changes in muscle tone or posture. Their corrective effect depends on the therapist's experience and manual setting, lacks closed-loop control based on biomechanical feedback, has a low degree of intelligence, and is often not comfortable to wear for a long time.

[0004] Therefore, the present invention aims to provide a posture correction device for the ankle joint of hemiplegic patients to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a posture correction device for the ankle joint of hemiplegic patients. This invention can comprehensively correct ankle joint deformities such as foot drop, abnormal muscle tone, and inversion / outversion in hemiplegic patients through an angle adjustment mechanism and an airbag adjustment mechanism. At the same time, with the addition of padding, it is stable and comfortable to wear, avoiding pressure injury. The intelligent control system, combined with a pressure sensor, automatically adjusts the airbag pressure and announces the status via voice, ensuring balanced force and safe use. The device is easy to operate and suitable for home rehabilitation and professional training, meeting the long-term dynamic rehabilitation and daily assistance needs of patients.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a posture correction device for the ankle joint of a hemiplegic patient, comprising a foot support, a foot support frame on the foot support, a foot strap on the foot support frame, a support fixing frame on the foot support, a connecting frame on the support fixing frame, a calf support surface on the connecting frame, a calf strap on the calf support surface, an angle adjustment mechanism between the connecting frame and the foot support frame, the angle adjustment mechanism being used to improve the patient's foot drop posture and abnormal muscle tone, and an airbag adjustment mechanism on the foot support, the airbag adjustment mechanism being used to improve the patient's foot inversion posture and foot eversion posture.

[0007] By employing the aforementioned technical solutions, the footrest, foot support frame, and foot straps provide stable support and fixation for the patient's foot, preventing foot displacement during correction. Simultaneously, the support frame, connecting frame, lower leg support surface, and lower leg straps stabilize the lower leg, ensuring relative stability between the lower limb and foot. The angle adjustment mechanism precisely adjusts the angle between the foot and lower leg, specifically addressing the common foot drop posture in hemiplegic patients. Furthermore, through reasonable angle limiting and adjustment, it alleviates ankle stiffness and limited mobility caused by abnormal muscle tone. The airbag adjustment mechanism facilitates the application of differentiated flexible support to the foot. By adjusting the airbag pressure in different areas, it effectively corrects abnormal postures such as inversion and eversion of the foot. The entire device achieves synergistic correction of various ankle posture problems, including foot drop, abnormal muscle tone, and inversion / everversion. Its compact structure and convenient wearing make it suitable for the daily rehabilitation training and assisted walking needs of hemiplegic patients.

[0008] The present invention is further configured such that: the angle adjustment mechanism includes an adjustment knob, a rotating rod, a gear, an arc-shaped connecting rod, and an arc-shaped rack; the arc-shaped rack is mounted on the arc-shaped connecting rod, the arc-shaped connecting rod is connected to the foot support frame, the two ends of the rotating rod are respectively connected to the adjustment knob and the connecting frame, the gear is sleeved on the rotating rod, and the gear meshes with the arc-shaped rack.

[0009] By adopting the above technical solution, and utilizing the meshing transmission structure of the adjustment knob, rotating rod, gear, arc-shaped connecting rod, and arc-shaped rack, the system offers advantages such as high adjustment precision and convenient operation. Users can drive the gear to rotate by rotating the adjustment knob, which in turn drives the arc-shaped rack and arc-shaped connecting rod to move, achieving a smooth adjustment of the angle between the foot support frame and the lower leg support surface. The meshing transmission method of the gear and arc-shaped rack has a self-locking characteristic, ensuring that the adjusted angle is stably maintained and will not shift due to patient limb movement or external force. This allows for long-term maintenance of the corrected posture. At the same time, the mechanical transmission structure is highly reliable, has a long service life, and low maintenance costs, making it suitable for home rehabilitation scenarios and meeting the patient's need for independent and flexible adjustment of the corrected angle.

[0010] The present invention is further configured such that the adjustment knob is provided with anti-slip stripes.

[0011] By adopting the above technical solution and setting anti-slip stripes on the adjustment knob, the friction between the knob surface and the hand can be increased, effectively preventing slippage due to sweaty hands or uneven force during operation. Patients or medical staff can rotate the knob more easily and stably to adjust the angle, improving the convenience and safety of operation. Especially for hemiplegic patients with limited fine motor skills, the anti-slip stripe design reduces the difficulty of adjustment, allowing patients to complete the angle adjustment independently, enhancing the ease of use and adaptability of the device for self-rehabilitation.

[0012] The present invention is further configured such that: the airbag adjustment mechanism includes multiple independent airbags, an electric air pump, an inflation / deflation pipeline and a pipeline valve; the multiple independent airbags are installed on the footrest, the inflation / deflation pipeline is connected to the electric air pump and the independent airbags respectively, and the pipeline valve is installed on the inflation / deflation pipeline.

[0013] By adopting the above technical solution, the airbag adjustment mechanism consists of multiple independent airbags, an electric air pump, inflation and deflation pipelines, and pipeline valves. Among them, the flexible airbags, as force-applying components, have good conformity to the patient's foot and apply gentle and uniform force, avoiding pressure and friction damage to the skin of the foot caused by rigid orthotics. Multiple independent airbags can achieve independent inflation and deflation in different areas, enabling precise pressure correction to specific areas according to different degrees of foot inversion or eversion deformities. The electric air pump replaces manual inflation, reducing the labor intensity of inflation operations. The configuration of inflation and deflation pipelines and valves enables flexible control of the pressure of each airbag, ensuring the adjustability of the correction force and adapting to individual differences among different patients.

[0014] The present invention is further configured such that: the pipeline valve is an electromagnetic valve, and pressure sensors are provided in the multiple independent airbags.

[0015] By adopting the above technical solution and using solenoid valves for the pipeline valves, the inflation and deflation of the airbags can be automatically controlled. Compared with manual valves, the control accuracy is higher and the response speed is faster. The airbag pressure can be adjusted in real time according to the correction needs. Pressure sensors are set in multiple independent airbags to monitor the pressure value of each airbag in real time, avoiding the problem of excessive pressure on the feet due to over-inflation or poor correction effect due to under-inflation. It achieves precise control of the correction force. The cooperation between the pressure sensors and solenoid valves ensures the safety and effectiveness of the correction process.

[0016] The present invention is further configured such that: the plurality of independent airbags include a heel area airbag, a toe arch area airbag, a lateral area airbag and an anterior plantar area airbag; the heel area airbag, toe arch area airbag, lateral area airbag and anterior plantar area airbag are installed on the footrest, respectively corresponding to the heel area, toe arch area, lateral area and anterior plantar area of ​​the patient's foot.

[0017] By adopting the above technical solution, multiple independent airbags are clearly divided into heel area airbags, toe arch area airbags, lateral area airbags, and forefoot area airbags, corresponding to specific locations on the patient's foot. This ensures that the force application area of ​​the airbags is precisely matched with the key correction areas of foot deformities. For patients with inversion, the pressure of the lateral area airbag can be increased to support the lateral side of the foot and correct the inversion posture. For patients with eversion, the pressure of the corresponding medial area airbag can be adjusted to achieve correction. The heel area, toe arch area, and forefoot area airbags can work together to adjust the force distribution on the sole of the foot, improve the problem of uneven force distribution on the sole of the foot caused by abnormal muscle tone, and further improve the accuracy and targeting of posture correction.

[0018] The invention is further configured such that a calf pad is provided on the calf support surface.

[0019] By adopting the above technical solution, a calf pad is placed on the calf support surface, which can effectively increase the buffer layer between the calf and the support surface, reduce the pressure intensity of the support surface on the calf skin, and avoid skin abrasion, pressure sores and other problems caused by long-term wear. The pad is soft and breathable, which can improve the patient's wearing comfort and reduce discomfort caused by stuffiness and pressure. At the same time, the pad can increase the friction between the calf and the calf, improve the stability of the calf fixation, prevent the calf from sliding relative to the support surface during the correction process, and ensure the correction effect.

[0020] The present invention is further configured such that: an inner foot liner is provided inside the foot support frame.

[0021] By adopting the above technical solution, an inner foot liner is placed inside the foot support frame. On the one hand, it can fill the gap between the foot and the support frame, making the fit between the foot and the support frame tighter, improving the stability of foot fixation, and preventing foot wobbling during the correction process. On the other hand, the inner foot liner can provide flexible support for the sole and sides of the foot, dispersing the force of the foot support frame, reducing the pressure of the rigid frame on the protruding parts of the foot bones, and protecting the skin and bones of the foot. In addition, the breathable and soft inner foot liner can improve wearing comfort, extend the wearing time for patients, and is more conducive to long-term rehabilitation and correction.

[0022] The present invention is further configured such that: a PLC controller is provided on the footrest, the PLC controller is communicatively connected to a pressure sensor, an electric air pump and a solenoid valve, and the PLC controller integrates an intelligent control system.

[0023] By adopting the above technical solution, a PLC controller is installed on the foot brace and communicated with the pressure sensor, electric air pump, and solenoid valve to integrate an intelligent control system, realizing the automation and intelligence of ankle joint posture correction. The PLC controller can receive real-time pressure data from the pressure sensor and automatically control the working status of the electric air pump and solenoid valve according to the preset correction parameters. The inflation and deflation of the airbag and pressure adjustment can be completed without manual intervention, reducing the workload of medical staff. The intelligent control system can preset personalized correction plans for different patients' deformities, improving the accuracy and personalization of correction. At the same time, the integration of the PLC controller enables the various components of the device to work together, ensuring the stability and reliability of the correction process.

[0024] The present invention is further configured such that: the intelligent control system includes a data acquisition module, a data processing module, an intelligent analysis module, an automatic control module, and a voice broadcasting module; The data acquisition module receives electrical signals transmitted from the pressure sensor, converts them into digital signals, and transmits them to the data processing module. The data processing module receives the digital signals transmitted from the data acquisition module, performs signal filtering and format conversion to obtain accurate digital pressure signals, and transmits them to the intelligent analysis module. The intelligent analysis module receives the digital pressure signals transmitted from the data processing module, analyzes them, generates control signals, and transmits them to both the automatic control module and the voice broadcast module. The automatic control module receives the control signals transmitted from the intelligent analysis module, converts them into control commands, and automatically controls the electric air pump to inflate and deflate multiple independent airbags, ensuring balanced pressure on the patient's soles. The voice broadcast module receives the control signals transmitted from the intelligent analysis module, combines them with timestamps to generate real-time status information of the posture correction device, and then broadcasts the information.

[0025] By adopting the above technical solution and utilizing the collaborative work of the data acquisition module, data processing module, intelligent analysis module, automatic control module, and voice broadcasting module, intelligent management and control of the entire correction process is achieved. The data acquisition and processing modules can accurately collect and filter the signals from the pressure sensor to ensure the accuracy of the pressure data. The intelligent analysis module can determine the patient's foot posture and force balance based on the pressure data and automatically generate the optimal control strategy. The automatic control module can precisely adjust the airbag pressure according to the control strategy and adjust the correction force in real time to ensure balanced force on the sole of the foot and improve the correction effect. The voice broadcasting module can broadcast the working status of the device in real time, so that patients or medical staff can keep abreast of the correction progress and the operation of the device, enhancing the human-computer interaction and safety of the device.

[0026] In summary, the present invention has the following beneficial effects: This invention integrates an angle adjustment mechanism and an airbag adjustment mechanism. It precisely improves foot drop and abnormal muscle tone through a gear-rack transmission angle adjustment structure, and specifically corrects inversion / outversion of the foot through zoned independent airbags. This forms a comprehensive correction of the main deformities of the ankle joint in hemiplegic patients, solving the problem of the functional limitations of a single correction device and improving the comprehensiveness and effectiveness of rehabilitation correction. This invention utilizes a dual-fixation structure of foot support and calf support surface, combined with anti-slip stripes and self-locking transmission design, to ensure that the device is not easily displaced after being worn and can be stably maintained after angle adjustment. The operation mode that combines mechanical adjustment and intelligent control not only satisfies the flexibility of patients to manually adjust themselves, but also supports automated inflation and deflation control, adapting to patients with different operating abilities and taking into account both home rehabilitation and professional training scenarios. This invention avoids pressure damage to the skin and bones of the foot caused by rigid contact through the cushioning setting of independent airbags and pads, reducing the risk of pressure sores. The linkage between the pressure sensor and the PLC intelligent control system enables real-time monitoring and automatic adjustment of airbag pressure to ensure balanced pressure on the sole of the foot. At the same time, the voice broadcast function provides real-time feedback on the status of the device, improving safety and transparency in use. This invention extends the lifespan of the device and reduces maintenance costs through the high reliability of mechanical structures such as gears and racks and the stable operation of solenoid valves and electric air pumps. At the same time, personalized correction parameter settings can be adapted to the limb characteristics of different patients, allowing it to be dynamically adjusted along with the patient's rehabilitation process, meeting the continuous needs of long-term rehabilitation training and daily assisted walking. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the appearance of a posture correction device for the ankle joint of a hemiplegic patient according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the angle adjustment of a posture correction device for the ankle joint of a hemiplegic patient in an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the working principle of the angle adjustment mechanism in an embodiment of the present invention; Figure 4 This is a schematic diagram of the independent airbag installation of the airbag adjustment mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the working principle of the PLC controller in an embodiment of the present invention; Figure 6 This is a schematic diagram of the module structure of the intelligent control system in an embodiment of the present invention.

[0028] In the diagram: 1. Foot support; 2. Foot support frame; 3. Foot strap; 4. Support fixing frame; 5. Connecting frame; 6. Lower leg support surface; 7. Lower leg strap; 8. Adjustment knob; 9. Rotating rod; 10. Gear; 11. Arc-shaped connecting rod; 12. Arc-shaped rack; 13. Anti-slip stripes; 14. Electric air pump; 15. Movable buckle; 16. Solenoid valve; 17. Pressure sensor; 18. Heel area airbag; 19. Toe arch area airbag; 20. Lateral area airbag; 21. Forefoot area airbag; 22. Lower leg pad; 23. Inner foot pad; 24. PLC controller; 25. Data acquisition module; 26. Data processing module; 27. Intelligent analysis module; 28. Automatic control module; 29. ​​Voice broadcast module. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-6 The present invention will be described in further detail below.

[0030] Example: A posture correction device for the ankle joint of a hemiplegic patient includes a footrest 1, a foot support frame 2 around the footrest 1, two foot straps 3 mounted on the foot support frame 2, and movable buckles 15 on the foot straps 3 to easily adjust the tightness of the foot straps 3. The footrest 1, foot support frame 2, and foot straps 3 provide stable support and fixation for the patient's foot, preventing foot displacement during correction. Support frames 4 are fixedly mounted on both sides of the footrest 1, and connecting frames 5 are hinged to the support frames 4. Lower leg support surfaces 6 are mounted on the connecting frames 5. The lower leg support surfaces 6 can be made of breathable flexible leather or fabric. Two lower leg straps 7 are mounted on the lower leg support surfaces 6, and movable buckles are mounted on the lower leg straps 7. 15. The tightness of the calf strap 7 can be easily adjusted. The support frame 4, connecting frame 5, calf support surface 6 and calf strap 7 are used to fix the calf and ensure the relative position stability of the lower limb and foot. An angle adjustment mechanism is installed between the connecting frame 5 and the foot support frame 2. The angle adjustment mechanism is used to precisely adjust the angle between the foot and the calf, specifically improve the common foot drop posture of hemiplegic patients, and relieve ankle stiffness and limited movement caused by abnormal muscle tone through reasonable angle limit and adjustment. The foot support 1 is equipped with an airbag adjustment mechanism, which facilitates the application of differentiated flexible support force to the foot. By adjusting the airbag pressure in different areas, abnormal postures of foot inversion and foot eversion can be effectively corrected.

[0031] In this preferred embodiment, the angle adjustment mechanism includes an adjustment knob 8, a rotating rod 9, a gear 10, an arc-shaped connecting rod 11, and an arc-shaped rack 12. The arc-shaped rack 12 is mounted on the arc-shaped connecting rod 11, which is connected to the foot support frame 2. The rotating rod 9 is fixedly connected to the adjustment knob 8. The adjustment knob 8 is provided with anti-slip stripes 13 to increase the friction between the knob surface and the hand. The rotating rod 9 is connected to the connecting frame 5 with damping rotation. The gear 10 is sleeved on the rotating rod 9 and meshes with the arc-shaped rack 12. The user can drive the gear 10 to rotate by rotating the adjustment knob 8, which in turn drives the arc-shaped rack 12 and the arc-shaped connecting rod 11 to move, thereby achieving a smooth adjustment of the angle between the foot support frame 2 and the lower leg support surface 6. The meshing transmission method of the gear 10 and the arc-shaped rack 12 has a self-locking characteristic, and the adjusted angle can be stably maintained without shifting due to the patient's limb movement or external force, which is used to maintain the corrected posture for a long time.

[0032] In this preferred embodiment, the airbag adjustment mechanism includes multiple independent airbags, an electric air pump 14, inflation / deflation lines, and line valves. Multiple independent airbags are mounted on the footrest 1. The inflation / deflation lines are connected to the electric air pump 14 and the independent airbags, respectively. The line valves are installed on the inflation / deflation lines. The flexible airbags, acting as force-applying components, conform well to the patient's foot, applying gentle and even force, avoiding pressure and friction damage to the foot skin caused by rigid orthotics. The multiple independent airbags can be independently inflated and deflated in zones, allowing for precise pressure correction of specific areas based on the degree of foot inversion or eversion deformity. The electric air pump 14 replaces manual inflation, reducing the labor intensity of inflation operations. The configuration of the inflation / deflation lines and valves enables flexible control of the pressure of each airbag, ensuring adjustable correction force and adapting to individual differences among patients.

[0033] In this preferred embodiment, the pipeline valve is a solenoid valve 16, which can realize the automatic control of airbag inflation and deflation. Compared with manual valve, it has higher control accuracy and faster response speed. It can adjust the airbag pressure in real time according to the correction needs. Multiple independent airbags are equipped with pressure sensors 17, which can monitor the pressure value of each airbag in real time, avoiding the problem of excessive pressure on the foot due to over-inflation or poor correction effect due to under-inflation, thus realizing precise control of the correction force.

[0034] In this preferred embodiment, the multiple independent airbags include a heel area airbag 18, a toe arch area airbag 19, a lateral area airbag 20, and a foreplantar area airbag 21. The heel area airbag 18, toe arch area airbag 19, lateral area airbag 20, and foreplantar area airbag 21 are mounted on the footrest 1, corresponding to the heel area, toe arch area, lateral area, and foreplantar area of ​​the patient's foot, respectively. This is achieved by clearly dividing the multiple independent airbags into the heel area airbag 18, toe arch area airbag 19, lateral area airbag 20, and foreplantar area airbag 21, and corresponding to the patient's... The specific location of the foot allows the force application area of ​​the airbag to be precisely matched with the key correction areas of the foot deformity. For patients with inversion, the pressure of the lateral airbag 20 can be increased to support the lateral side of the foot to correct the inversion posture. For patients with eversion, the pressure of the corresponding medial airbag can be adjusted to achieve correction. The heel, toe arch, and forefoot airbags 21 can work together to adjust the force distribution on the sole of the foot, improve the problem of uneven force distribution on the sole of the foot caused by abnormal muscle tone, and further improve the accuracy and targeting of posture correction.

[0035] In this preferred embodiment, the calf support surface 6 is provided with a calf pad 22, which can effectively increase the buffer layer between the calf and the support surface, reduce the pressure intensity of the support surface on the calf skin, and avoid skin abrasion, pressure sores and other problems caused by long-term wear. The pad has soft and breathable properties, which can improve the patient's wearing comfort and reduce discomfort caused by stuffiness and pressure. At the same time, the pad can increase the friction with the calf, improve the stability of calf fixation, prevent the calf from sliding relative to the support surface during the correction process, and ensure the correction effect.

[0036] In this preferred embodiment, the foot support frame 2 is provided with an inner foot pad 23. On the one hand, it can fill the gap between the foot and the support frame, making the fit between the foot and the support frame tighter, improving the stability of foot fixation, and preventing foot shaking during the correction process. On the other hand, the inner foot pad 23 can provide flexible support for the sole and sides of the foot, disperse the force of the foot support frame 2, reduce the pressure of the rigid frame on the protruding parts of the foot bones, and protect the skin and bones of the foot. In addition, the breathable and soft inner foot pad 23 can improve wearing comfort, prolong the wearing time of the patient, and is more conducive to long-term rehabilitation and correction.

[0037] In this preferred embodiment, the footrest 1 is equipped with a PLC controller 24. The PLC controller 24 is communicatively connected to the pressure sensor 17, the electric air pump 14, and the solenoid valve 16. The PLC controller 24 integrates an intelligent control system, realizing the automation and intelligence of ankle joint posture correction. The PLC controller 24 can receive real-time pressure data from the pressure sensor 17 and automatically control the working state of the electric air pump 14 and the solenoid valve 16 according to the preset correction parameters. The inflation and deflation of the airbag and the pressure adjustment can be completed without manual intervention, reducing the workload of medical staff. The intelligent control system can preset personalized correction plans for different patients' deformities, improving the accuracy and personalization of correction. At the same time, the integration of the PLC controller 24 enables the various components of the device to work together, ensuring the stability and reliability of the correction process.

[0038] In this preferred embodiment, the intelligent control system includes a data acquisition module 25, a data processing module 26, an intelligent analysis module 27, an automatic control module 28, and a voice broadcast module 29. The data acquisition module 25 receives the electrical signal transmitted by the pressure sensor 17, converts the electrical signal into a digital signal, and transmits it to the data processing module 26. The data processing module 26 receives the digital signal transmitted by the data acquisition module 25, performs signal filtering and format conversion to obtain an accurate digital pressure signal, and transmits it to the intelligent analysis module 27. The intelligent analysis module 27 receives the digital pressure signal transmitted by the data processing module 26, analyzes it, generates a control signal, and transmits it to both the automatic control module 28 and the voice broadcast module 29. The automatic control module 28 receives the control signal transmitted by the intelligent analysis module 27, converts it into a control command, and automatically controls the electric air pump 14 to inflate and deflate multiple independent airbags, ensuring balanced pressure on the patient's soles. The voice broadcast module 29 receives the control signal transmitted by the intelligent analysis module 27, generates real-time status information of the posture correction device based on a timestamp, and then broadcasts it.

[0039] In this embodiment, the data acquisition module 25 is integrated inside the PLC controller 24. The sampling frequency of the pressure sensor 17 is configured to be 10Hz through programming. The module receives the analog electrical signals (0~5V) transmitted by the four pressure sensors 17 in real time and converts them into 16-bit digital signals through the built-in A / D conversion module of the PLC. The signals are then synchronously stored in the PLC's data register to ensure continuous acquisition and lossless transmission of pressure data.

[0040] In this embodiment, the data processing module 26 uses the Kalman filter algorithm to filter the digital signal, eliminating interference signals caused by slight movements of the patient's limbs and environmental vibrations; the filtered digital signal is converted into a standard digital pressure signal (unit: MPa) according to a preset conversion standard, and the format is uniformly "area identifier-pressure value-collection timestamp", and then transmitted to the intelligent analysis module 27.

[0041] In this embodiment, the intelligent analysis module 27 presets the foot's balanced pressure range to be 0.1~0.3MPa. After receiving the processed pressure signal, the intelligent analysis module 27 performs three core analyses: comparing the pressure values ​​of each region with the preset range to determine whether there is excessive pressure (>0.3MPa), excessive pressure (<0.1MPa), or excessive regional difference (>0.15MPa); combining the pressure distribution characteristics to determine the deformity type: for example, if the pressure in the lateral region is continuously too low, it is determined to be a tendency of foot inversion; if the pressure in the corresponding region on the medial side (medial side of the toe arch) is too low, it is determined to be a tendency of foot eversion; generating control signals: including airbag inflation / deflation commands (including target pressure value and execution area) and status broadcast commands (including abnormality type and current pressure value), which are synchronously transmitted to the automatic control module 28 and the voice broadcast module 29.

[0042] In this embodiment, the automatic control module 28 uses a PID control algorithm to convert the control signal into specific control commands: Inflation command: Control the electric air pump 14 to start, and at the same time open the solenoid valve 16 corresponding to the target airbag until the pressure sensor 17 reports that the target pressure value has been reached, then close the air pump and the solenoid valve 16. Deflator command: Turn off the electric air pump 14, open the solenoid valve 16 corresponding to the target airbag to release pressure until the pressure drops to the target value, then close the solenoid valve 16; Dynamic adjustment: Pressure data is collected every 5 seconds, and fine-tuning is performed in real time based on feedback to ensure that the pressure in each area is always maintained within a balanced range, avoiding fluctuations in force that could lead to a decrease in the corrective effect.

[0043] After receiving the control signal, the voice broadcast module 29 generates real-time status information by combining it with the timestamp, and broadcasts it once every 10 seconds, as shown in the example below: Normal state: "Current posture is normal, the pressure on the sole of the foot is balanced, the pressure in the lateral zone is 0.22MPa, and the pressure in the heel zone is 0.25MPa"; Correction status: "Foot inversion tendency detected, inflating lateral zone airbag 20, current pressure 0.18MPa, target pressure 0.28MPa"; Error message: "Warning! Pressure in the forefoot area is too high (0.35MPa). It has been automatically deflated. Please adjust the wearing position."

[0044] In this embodiment, the collaborative operation of the data acquisition module 25, data processing module 26, intelligent analysis module 27, automatic control module 28, and voice broadcast module 29 achieves intelligent control of the entire correction process. The data acquisition module 25 and the processing module can accurately collect and filter the signals from the pressure sensor 17 to ensure the accuracy of the pressure data. The intelligent analysis module 27 can judge the patient's foot posture and force balance based on the pressure data and automatically generate the optimal control strategy. The automatic control module 28 can accurately adjust the airbag pressure according to the control strategy and adjust the correction force in real time to ensure balanced force on the sole of the foot and improve the correction effect. The voice broadcast module 29 can broadcast the working status of the device in real time, so that patients or medical staff can keep abreast of the correction progress and the operation of the device, enhancing the human-computer interaction and safety of the device.

[0045] Working principle: When using this posture correction device, the patient's foot and lower leg are first fixed by the foot strap 3 and the lower leg strap 7 to ensure the stability of the correction. Then, by rotating the adjustment knob 8 with anti-slip stripes 13, the angle between the foot and lower leg is adjusted through the meshing of the gear 10 and the arc rack 12. The angle is self-locking to improve foot drop and abnormal muscle tone. At the same time, the pressure sensor 17 collects the pressure data of the foot zone airbags in real time and transmits it to the PLC controller 24. After analysis and processing by the intelligent control system, the electric air pump 14 and the solenoid valve 16 are automatically controlled to inflate and deflate the independent airbag zones to correct foot inversion / outversion and balance the force on the foot. The voice broadcast module 29 provides synchronous feedback on the real-time status of the device, realizing accurate, intelligent and safe posture correction.

[0046] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A posture correction device for the ankle joint of a hemiplegic patient, characterized in that: The device includes a foot support (1), a foot support frame (2) on the foot support (1), a foot strap (3) on the foot support frame (2), a support fixing frame (4) on the foot support (1), a connecting frame (5) on the support fixing frame (4), a calf support surface (6) on the connecting frame (5), a calf strap (7) on the calf support surface (6), an angle adjustment mechanism between the connecting frame (5) and the foot support frame (2), the angle adjustment mechanism being used to improve the patient's foot drop posture and abnormal muscle tone, and an airbag adjustment mechanism on the foot support (1), the airbag adjustment mechanism being used to improve the patient's foot inversion posture and foot eversion posture.

2. The posture correction device for the ankle joint of a hemiplegic patient according to claim 1, characterized in that: The angle adjustment mechanism includes an adjustment knob (8), a rotating rod (9), a gear (10), an arc-shaped connecting rod (11), and an arc-shaped rack (12); the arc-shaped rack (12) is mounted on the arc-shaped connecting rod (11), the arc-shaped connecting rod (11) is connected to the foot support frame (2), the two ends of the rotating rod (9) are respectively connected to the adjustment knob (8) and the connecting frame (5), the gear (10) is sleeved on the rotating rod (9), and the gear (10) meshes with the arc-shaped rack (12).

3. A posture correction device for the ankle joint of a hemiplegic patient according to claim 2, characterized in that: The adjustment knob (8) is provided with anti-slip stripes (13).

4. A posture correction device for the ankle joint of a hemiplegic patient according to claim 1, characterized in that: The airbag adjustment mechanism includes multiple independent airbags, an electric air pump (14), an inflation / deflation pipeline, and pipeline valves; the multiple independent airbags are installed on the footrest (1), the inflation / deflation pipelines are respectively connected to the electric air pump (14) and the independent airbags, and the pipeline valves are installed on the inflation / deflation pipelines.

5. A posture correction device for the ankle joint of a hemiplegic patient according to claim 4, characterized in that: The pipeline valves are solenoid valves (16), and pressure sensors (17) are installed in the multiple independent airbags.

6. A posture correction device for the ankle joint of a hemiplegic patient according to claim 5, characterized in that: The multiple independent airbags include a heel area airbag (18), a toe arch area airbag (19), a lateral area airbag (20), and a foreplantar area airbag (21); the heel area airbag (18), toe arch area airbag (19), lateral area airbag (20), and foreplantar area airbag (21) are installed on the footrest (1) and correspond to the heel area, toe arch area, lateral area, and foreplantar area of ​​the patient's foot, respectively.

7. A posture correction device for the ankle joint of a hemiplegic patient according to claim 1, characterized in that: The lower leg support surface (6) is provided with a lower leg pad (22).

8. A posture correction device for the ankle joint of a hemiplegic patient according to claim 1, characterized in that: The foot support frame (2) is provided with an inner foot pad (23).

9. A posture correction device for the ankle joint of a hemiplegic patient according to claim 6, characterized in that: The footrest (1) is equipped with a PLC controller (24), which is communicatively connected to a pressure sensor (17), an electric air pump (14) and a solenoid valve (16). The PLC controller (24) integrates an intelligent control system.

10. A posture correction device for the ankle joint of a hemiplegic patient according to claim 9, characterized in that: The intelligent control system includes a data acquisition module (25), a data processing module (26), an intelligent analysis module (27), an automatic control module (28), and a voice broadcasting module (29); The data acquisition module (25) is used to receive the electrical signal transmitted by the pressure sensor (17), convert the electrical signal into a digital signal and transmit it to the data processing module (26); the data processing module (26) is used to receive the digital signal transmitted by the data acquisition module (25), perform signal filtering and format conversion to obtain an accurate digital pressure signal and transmit it to the intelligent analysis module (27); the intelligent analysis module (27) is used to receive the digital pressure signal transmitted by the data processing module (26) and perform analysis, generate a control signal and transmit it to the automatic control module (28) and the voice broadcast module (29); the automatic control module (28) is used to receive the control signal transmitted by the intelligent analysis module (27) and convert it into a control command to automatically control the electric air pump (14), thereby performing inflation and deflation operations on multiple independent airbags to ensure balanced pressure on the patient's soles; the voice broadcast module (29) is used to receive the control signal transmitted by the intelligent analysis module (27), generate real-time status information of the posture correction device in combination with the timestamp and then broadcast it.

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