Lower limb exercise rehabilitation device based on electrical stimulation

Abstract

The invention discloses a lower limb exercise rehabilitation device based on electrical stimulation, and relates to the technical field of electrical stimulation rehabilitation. Comprising a base, a device body, a fixing block and mounting blocks, the device body comprises a lifting rod and a telescopic rod, the end of the telescopic rod is fixedly connected with the fixing block, the mounting blocks are slidably arranged on the surfaces of the two sides of the fixing block, adjusting assemblies are arranged in the mounting blocks, and transmission assemblies capable of driving the adjusting assemblies to move are arranged on the two sides of the adjusting assemblies; pedals are arranged on the surfaces of the sides, away from the fixing blocks, of the two mounting blocks, hook-and-loop fasteners are arranged on the upper surfaces of the pedals, and fixing rods penetrate through the inner walls of the fixing blocks. Current meeting the human body tolerance standard is output through the first conductive patch and the second conductive patch, blood circulation of the lower limbs of a patient is promoted, muscle tension is relieved, meanwhile, the rehabilitation effect can be improved in cooperation with mechanical training, and meanwhile the personalized requirements of different patients in all rehabilitation stages can be met conveniently through arrangement of the adjusting assembly and the transmission assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical stimulation rehabilitation, in particular to a lower limb movement rehabilitation device based on electrical stimulation. BACKGROUND

[0002] In clinical medicine, there are lower limbs that cannot be moved for a long time due to accidental injury or surgical treatment, causing muscle atrophy, decreased motor ability, or sequelae such as limb numbness and lower limb stiffness caused by cerebral infarction, and patients cannot control the lower limb muscles due to hemiplegia. The functional lower limbs of such patients are damaged. In order to restore the function of the lower limbs of the patients, a lower limb functional rehabilitation training device is needed to train the lower limbs of the patients to improve the muscle ability of the lower limbs, and then restore to a healthy state or achieve autonomous movement. Through electrical stimulation combined with muscle movement, the rehabilitation effect can be improved through multiple training methods.

[0003] In the prior art, the rehabilitation device is a core tool for realizing standardized and systematic training. The adaptability of the weight resistance adjustment function in cooperation with electrical stimulation is directly related to the training safety and rehabilitation efficiency. The lower limb rehabilitation training relying on the existing rehabilitation device has obvious functional limitations. In the training process, the patient mainly relies on active force or mechanical assistance to complete basic movements. It is not convenient to precisely and effectively stimulate the lower limb muscle group and neural pathway. Under this single training mode, the lower limb muscles are prone to atrophy due to insufficient activity for a long time, and the efficiency of nerve signal transmission is difficult to improve. Not only will the rehabilitation process be delayed, but also the patient may have slow muscle strength recovery and weak motor control ability, making it difficult to achieve the expected rehabilitation goal. Moreover, the weight adjustment mechanism of the rehabilitation device generally adopts a fixed gear design. The core parameters such as load threshold and force reaction force corresponding to each adjustment gear are fixed values preset by the factory, lacking dynamic adjustment space, and having certain limitations in use. It cannot match the above individual needs. For patients with low load tolerance, the fixed gear may exceed their physiological bearing range, easily causing muscle compensation, joint pain and other problems. For patients who need advanced training, the fixed gear cannot provide precise load gradient, resulting in insufficient training stimulation, ultimately reducing the clinical adaptability of the device, and making it difficult to meet the stage-by-stage rehabilitation needs of different patients. SUMMARY

[0004] In order to solve the technical problem of single training mode of the device, the present application designs a lower limb movement rehabilitation device based on electrical stimulation, so as to output current through the first conductive patch and the second conductive patch, and simultaneously cooperate with mechanical training to achieve the technical effect of accelerating the rehabilitation process of the patient.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a lower limb movement rehabilitation device based on electric stimulation, comprising a base, a device main body, a fixing block and a mounting block, the device main body comprises a lifting rod and a telescopic rod, the end of the telescopic rod is fixedly connected with the fixing block, and the two side surfaces of the fixing block are slidably provided with the mounting block; The inside of the mounting block is provided with an adjusting assembly, and the two sides of the adjusting assembly are provided with a transmission assembly capable of driving the movement thereof; The side surfaces of the two groups of mounting blocks away from the fixing block are provided with pedals, and the upper surfaces of the pedals are provided with magic tapes; The inner wall of the fixing block penetrates a fixed rod, the two ends of the fixed rod are fixedly connected with shaft rods extending into the inside of the mounting block, and the other end of the shaft rod is rotatably connected with the inner wall of the mounting block; The upper side of the pedal is connected with a fixed ring, the inner wall of the fixed ring is provided with a first conductive patch, the inside of the bottom end of the pedal is provided with a second conductive patch, one end of the pedal is fixedly provided with a battery, and the battery is connected with the first conductive patch and the second conductive patch through a connecting line.

[0006] Preferably, the adjusting assembly comprises two groups of friction blocks located on the two sides of the outer wall of the shaft rod, one side surface of the two groups of friction blocks is fixedly connected with a screw rod, one end of the screw rod away from the friction block extends to the outside of the mounting block, and a knob is fixedly connected with the screw rod, and the outer wall of the knob is provided with anti-skid lines.

[0007] Preferably, the transmission assembly comprises two groups of threaded rods rotatably connected with the inner wall of the mounting block, the left side of the threaded rod is provided with a sliding rod, the sliding rod is fixedly connected with the inner wall of the mounting block, the outer wall of the threaded rod and the sliding rod is sleeved with two groups of movable plates, and one side surface of the movable plate close to the shaft rod is fixedly connected with a connecting plate.

[0008] Preferably, one side surface of the friction block close to the shaft rod is V-shaped, and the inner wall is provided with friction lines, the friction block is in contact with the outer wall of the shaft rod after movement, the connecting plate is in threaded connection with the screw rod, the movable plate is in sliding connection with the screw rod, and the connecting plate is in contact with the surface of the friction block after movement.

[0009] Preferably, the outer wall of the two ends of the threaded rod is fixedly connected with a second gear, the one side surface of the second gear is engaged with a second rack, the tail end of the second rack is fixedly connected with a connecting rod, the end of the inner wall of the mounting block is fixedly connected with two groups of fixed sleeves, the connecting rod is slidably connected with the inner wall of the fixed sleeve, and the inner wall of the fixed sleeve is provided with concave-convex textures.

[0010] Preferably, one end of the two groups of second racks away from the connecting rod is fixedly connected with a transmission plate, the other side surface of the transmission plate is fixedly connected with a connecting block at the center position, the right side surface of the connecting block is fixedly connected with a transmission rod, and the transmission rod is rotatably connected with the pedal.

[0011] Preferably, a first gear is sleeved at the center position of the fixed rod, a first rack fixedly connected to the inner wall of a fixed block is engaged below the first gear, limit grooves with the same inclination as the first rack are arranged on the surfaces of the two sides of the fixed block, the fixed rod is sleeved in the inner wall of the limit groove, and a slotted groove matched with the transmission rod is arranged on the surface of the mounting block away from the fixed block.

[0012] Preferably, through grooves are arranged at the two ends of the transmission plate, and limit rods matched with the through grooves are fixedly connected to the surfaces of the two sides of the inner wall of the mounting block.

[0013] To sum up, the present application mainly has the following advantages: 1. The current output by the first conductive patch and the second conductive patch in compliance with the human tolerance standard is output to the lower limbs of the patient through the battery and the connecting line, which can promote local blood circulation, effectively improve the oxygen supply and nutrient transport efficiency of muscle tissue, help to discharge metabolic waste, relieve muscle stiffness and tension caused by poor blood circulation, simulate nerve signals to trigger passive muscle fiber contraction, maintain muscle activity, delay disuse atrophy, make up for the short board that pure mechanical training only focuses on action assistance and is difficult to deeply activate muscles and regulate metabolism, and improve the comfort of the patient's lower limbs, reduce muscle fatigue accumulation caused by long-term mechanical training, and cooperate with training to speed up the patient's rehabilitation process.

[0014] 2. The installation block, shaft rod and fixed rod are moved along the preset track of the limit groove by using the pedal to apply pressure, in the moving process, the second rack is moved by the connecting block cooperating with the transmission plate, the second rack drives the threaded rod to rotate by cooperating with the second gear, the friction block is moved by the connecting plate, the resistance of the shaft rod is applied, the movement of the second rack is applied by the connecting rod and the fixed sleeve, the friction block gradually approaches the shaft rod slowly with the movement of the pedal, when the contact area of the friction block and the shaft rod gradually increases, the resistance of the shaft rod is gradually increased, the training resistance can be naturally changed according to the force state of the patient, the moving distance of the pedal is proportional to the friction force of the friction block, when the moving distance of the pedal is longer, the resistance of the shaft rod is larger, when the moving distance of the pedal is shorter, the resistance of the shaft rod is smaller, the physiological over-limit problem caused by the fixed gear to the patients with low load tolerance is avoided, the application range is wider, and the flexibility is higher.

[0015] 3、 The present application can adjust the initial distance between the two groups of friction blocks and the shaft by rotating the knob manually, that is, the screw rod, calibrate the initial resistance according to the weight and injury condition of the patient, further expand the adaptation range, meet the individual needs of different patients in each stage of rehabilitation, and the V-shaped friction block can form a wrapping type fit on the outer surface of the shaft, which can significantly increase the effective contact area of the friction block and the shaft. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic view of the overall structure of the present application; Figure 2 It is a three-dimensional schematic view of the structure of the present application; Figure 3 It is a three-dimensional schematic view of the partial structure of the present application; Figure 4 It is a three-dimensional schematic view of the internal structure of the mounting block of the present application; Figure 5 It is a three-dimensional schematic view of the overall structure of the adjusting assembly of the present application; Figure 6 It is a three-dimensional schematic view of the overall structure of the transmission assembly of the present application; Figure 7 It is a three-dimensional schematic view of the internal structure of the fixing block of the present application.

[0017] In the figure: 1, base; 2, device main body; 3, fixing block; 31, limiting groove; 32, first rack; 33, first gear; 34, fixed rod; 4, mounting block; 41, slot; 5, pedal; 61, friction block; 62, screw rod; 63, knob; 64, connecting plate; 65, movable plate; 71, transmission plate; 72, connecting block; 73, second rack; 74, connecting rod; 75, fixed sleeve; 76, second gear; 77, threaded rod; 78, sliding rod; 8, shaft. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0019] The embodiments of the present application will be described below according to the overall structure of the present application.

[0020] A lower limb movement rehabilitation device based on electrical stimulation, as shown in Figure 1 - Figure 7 The device main body 2 includes a lifting rod and a telescopic rod, and the position of the two groups of pedals 5 is adjusted through the cooperation of the lifting rod and the telescopic rod, so as to be convenient for adapting to patients of different heights. Exemplarily, the two groups of mounting blocks 4 are provided with footboards 5 away from the side surface of the fixing block 3, and the upper surface of the footboard 5 is provided with a magic tape, by which the patient's feet can be fixed on the footboard 5; The footboard 5 is connected with a fixing ring above, and the inner wall of the fixing ring is provided with a first conductive patch; the bottom end of the footboard 5 is internally provided with a second conductive patch; and the footboard 5 is fixedly provided with a battery at one end, which is connected with the first and second conductive patches through connecting wires. The battery can cooperate with the first and second conductive patches to output the current conforming to the human tolerance standard, so as to promote the blood circulation of the lower limbs of the patient and relieve muscle tension.

[0021] Referring to Figure 1 Figure 6 It can be known that the end of the telescopic rod is fixedly connected with the fixing block 3, and the two side surfaces of the fixing block 3 are slidingly provided with the mounting blocks 4, and the inside of the mounting block 4 is provided with an adjusting assembly and a transmission assembly. The adjusting assembly comprises two groups of friction blocks 61 located on the two sides of the outer wall of the shaft rod 8, and the friction blocks 61 can increase the resistance when the shaft rod 8 rotates. Exemplarily, the two groups of friction blocks 61 are fixedly connected with screw rods 62 at one side surface, and the end of the screw rod 62 away from the friction block 61 extends to the outside of the mounting block 4 and is fixedly connected with a knob 63, and the outer wall of the knob 63 is provided with anti-slip lines. By rotating the knob 63, the initial position between the friction block 61 and the shaft rod 8 can be adjusted through the screw rod 62. ​The cam 76 is fixed to the cam 76 on one side of the shaft 8 and the second rack 73 is engaged with the second rack 73 on the other side of the shaft 8. The cam 76 is fixed to the cam 76 on the other side of the shaft 8 and the second rack 73 is engaged with the second rack 73 on the other side of the shaft 8. The cam 76 is fixed to the cam 76 on the other side of the shaft 8 and the second rack 73 is engaged with the second rack 73 on the other side of the shaft 8. The cam 76 is fixed to the cam 76 on the other side of the shaft 8 and the second rack 73 is engaged with the second rack 73 on the other side of the shaft 8. There is a connecting block 72, and a transmission rod is fixedly connected to the right surface of the connecting block 72, and the transmission rod is rotatably connected to the pedal 5. After the friction block 61 moves, it contacts the outer wall of the shaft rod 8, and the connecting plate 64 is threadedly connected to the screw 62. The movable plate 65 is slidably connected to the screw 62. After the connecting plate 64 moves, it contacts the surface of the friction block 61. When the patient applies pressure to the pedal 5, the connecting block 72 pushes the transmission plate 71 to move, and the transmission plate 71 drives the second rack 73 to move. The cooperation between the connecting rod 74 and the fixed sleeve 75 can apply resistance to the movement of the second rack 73. When the second rack 73 drives the second gear 76 to rotate, the second gear 76 drives the threaded rod 77 to rotate, and the friction block 61 can be driven to move toward the shaft rod 8 through the movable plate 65 in cooperation with the connecting plate 64 and the screw 62. When the friction block 61 contacts the shaft rod 8, the resistance to the rotation of the shaft rod 8 can be increased.

[0022] See Figure 4 and Figure 5 It can be seen that a fixing rod 34 passes through the inner wall of the fixing block 3, and both ends of the fixing rod 34 are fixedly connected to a shaft rod 8 extending to the inside of the mounting block 4. The other end of the shaft rod 8 is rotatably connected to the inner wall of the mounting block 4. The surface of the friction block 61 close to the shaft rod 8 is V-shaped, and the inner wall is provided with friction grooves. The V-shaped friction block 61 can form a wrapping fit on the outer peripheral surface of the shaft rod 8, which significantly increases the effective contact area between the friction block 61 and the shaft rod 8.

[0023] See Figure 3 and Figure 7 It can be seen that a first gear 33 is fixedly sleeved at the center of the fixing rod 34, and a first rack 32 fixedly connected to the inner wall of the fixing block 3 is meshed below the first gear 33. The surfaces of both sides of the fixing block 3 are provided with limiting grooves 31 with the same inclination as the first rack 32. The two ends of the fixing rod 34 are sleeved on the inner walls of the limiting grooves 31. The setting of the limiting grooves 31 can position the movement direction of the shaft rod 8 and the fixing rod 34; Exemplary, the mounting block 4 is provided with a slot 41 matched with the transmission rod on the side surface away from the fixed block 3, and the movement direction of the transmission rod can be limited through the slot 41.

[0024] Referring to Figure 4 It can be seen that the transmission plate 71 is provided with a through slot at both ends, and the inner wall of the mounting block 4 is fixedly connected with a limiting rod matched with the through slot on both side surfaces, and the transmission plate 71 can be positioned through the cooperation of the through slot and the limiting rod.

[0025] The working principle of the present application is as follows: when the rehabilitation device is used, the patient sits on the seat, adjusts the position of the pedal 5 through the cooperation of the lifting rod and the telescopic rod on the device main body, ensures that the lower limbs of the patient are in a natural and comfortable training posture, places the two feet of the patient on the pedal 5 after the position adjustment is completed, sets the fixing ring on the leg of the patient, fixes the fixing ring, and then fixes the feet by using the magic tape preset on the pedal 5, and after the fixing is completed, the training resistance gear of the device main body 2 is preliminarily set according to the injury condition of the patient; During the training process, the patient applies pressure to the pedal 5, which drives the pedal 5 to move along the preset track, in the process, the pedal 5 drives the first gear 33 to do linear meshing movement along the first rack 32 through the interaction of the shaft rod 8 and the fixed rod 34, at the same time, the transmission rod cooperates with the connecting block 72 to synchronously drive the transmission plate 71 to move during the movement process of the pedal 5, the transmission plate 71 in turn drives the second rack 73 to do linear movement, the second rack 73 meshes with the second gear 76 to drive the threaded rod 77 to rotate synchronously, the threaded rod 77 rotates in the rotating process, drives the movable plate 65 to move towards each other through the cooperation of the sliding rod 78, the movable plate 65 cooperates with the connecting plate 64 and the screw rod 62 to drive the two groups of friction blocks 61 to move towards the shaft rod 8, with the gradual increase of the contact area of the friction blocks 61 and the shaft rod 8, the friction damping torque of the shaft rod 8 is synchronously improved when the shaft rod 8 rotates, realizing the dynamic incremental adjustment of the training resistance, so as to adapt to the differentiated needs of different injury degree patients for training intensity; During the training process, the battery cooperates with the connecting line to provide current, so that the first conductive patch and the second conductive patch output current conforming to the human body bearing standard to electrically stimulate the lower limbs of the patient, accelerate blood flow and relax muscles, and improve the effect of rehabilitation training; When it is necessary to cope with a higher initial friction resistance scene, or it is necessary to calibrate the initial resistance according to the individual differences of the patient, the adjustment can be realized by manually rotating the knob 63, by rotating the knob 63, the screw rod 62 is driven to rotate around its own axis, that is, the friction blocks 61 can be moved by the screw rod 62, the initial distance of the friction blocks 61 relative to the shaft rod 8 is adjusted, so as to further improve the adaptability of the device to patients with different weights and different injury conditions, and the contents not described in detail in the description belong to the prior art known to those skilled in the art.

[0026] Although the embodiments of the present application have been shown and described, the specific embodiments are merely exemplary and are not to be construed as limiting the present application, and the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations to the embodiments without creative contribution after reading the specification, and as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. An electric stimulation-based lower limb exercise rehabilitation device, comprising a base (1), a device body (2), a fixed block (3) and a mounting block (4), characterized in that: the device body (2) comprises a lifting rod and a telescopic rod, the end of the telescopic rod is fixedly connected with the fixed block (3), and the surfaces on both sides of the fixed block (3) are slidably provided with the mounting block (4); the inside of the mounting block (4) is provided with an adjusting assembly, and the adjusting assembly is provided with a transmission assembly on both sides which can drive the movement thereof; the surfaces on one side of the two groups of mounting blocks (4) away from the fixed block (3) are provided with pedals (5), and the upper surfaces of the pedals (5) are provided with magic tapes; the inside wall of the fixed block (3) penetrates a fixed rod (34), both ends of the fixed rod (34) are fixedly connected with shaft rods (8) extending into the inside of the mounting block (4), and the other end of the shaft rod (8) is rotatably connected with the inside wall of the mounting block (4); a fixed ring is connected above the pedal (5), a first conductive patch is mounted on the inner wall of the fixed ring, a second conductive patch is mounted in the inside of the bottom end of the pedal (5), a battery is fixedly mounted on one end of the pedal (5), and the battery is connected with the first conductive patch and the second conductive patch through connecting lines.

2. The device for rehabilitation of lower limb movement based on electric stimulation according to claim 1, characterized in that: the adjusting assembly comprises two groups of friction blocks (61) located on both sides of the outer wall of the shaft rod (8), one side surface of the two groups of friction blocks (61) is fixedly connected with a screw rod (62), one end of the screw rod (62) away from the friction block (61) extends to the outside of the mounting block (4) and is fixedly connected with a knob (63), and the outer wall of the knob (63) is provided with anti-slip lines.

3. An electrical stimulation based lower limb motor rehabilitation device according to claim 2, characterized in that: the transmission assembly comprises two groups of screw rods (77) rotatably connected to the inner wall of the mounting block (4), the left side of the screw rod (77) is provided with a sliding rod (78) fixedly connected to the inner wall of the mounting block (4), and the outer walls of the screw rod (77) and the sliding rod (78) are sleeved with two groups of movable plates (65), and one side surface of the movable plate (65) close to the shaft rod (8) is fixedly connected with a connecting plate (64).

4. The device for rehabilitation of lower limb motion based on electrical stimulation according to claim 3, characterized in that: one side surface of the friction block (61) close to the shaft rod (8) is V-shaped, and the inner wall is provided with friction lines, the friction block (61) is in contact with the outer wall of the shaft rod (8) after movement, the connecting plate (64) is in threaded connection with the screw rod (62), the movable plate (65) is in sliding connection with the screw rod (62), and the connecting plate (64) is in contact with the surface of the friction block (61) after movement.

5. An electrical stimulation based lower limb motor rehabilitation device according to claim 4, characterized in that: the outer walls of both ends of the screw rod (77) are fixedly connected with second gears (76), one side surfaces of the second gears (76) are engaged with second racks (73), the tail end of the second rack (73) is fixedly connected with a connecting rod (74), the inner wall of the mounting block (4) is fixedly connected with two groups of fixed sleeves (75), the connecting rod (74) is slidably connected to the inner wall of the fixed sleeve (75), and the inner wall of the fixed sleeve (75) is provided with concave-convex textures.

6. An electrical stimulation based lower limb motor rehabilitation device according to claim 5, characterized in that: Two groups of the second rack (73) is fixedly connected with a transmission plate (71) away from one end of the connecting rod (74), the other side surface center position of the transmission plate (71) is fixedly connected with a connecting block (72), the right side surface of the connecting block (72) is fixedly connected with a transmission rod, and the transmission rod is rotatably connected with the pedal (5).

7. The device for rehabilitation of lower limb motion based on electrical stimulation according to claim 1, characterized in that: The center position of the fixed rod (34) is fixedly sleeved with a first gear (33), the lower side of the first gear (33) is engaged with a first rack (32) fixedly connected to the inner wall of the fixed block (3), the two side surfaces of the fixed block (3) are both provided with a limiting groove (31) with the same inclination as the first rack (32), the two ends of the fixed rod (34) are sleeved in the inner wall of the limiting groove (31), and the side surface of the mounting block (4) away from the fixed block (3) is provided with a slotted groove (41) matched with the transmission rod.

8. The device for rehabilitation of lower limb motion based on electrical stimulation according to claim 6, characterized in that: The two ends of the transmission plate (71) are both provided with a through groove, and the two side surfaces of the inner wall of the mounting block (4) are both fixedly connected with a limiting rod matched with the through groove.

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