Lower limb nerve function rehabilitation training device

Abstract

The invention provides a lower limb nerve function rehabilitation training device. The lower limb nerve function rehabilitation training device comprises a rack, a traction mechanism, a fixing assembly, a switching assembly, a driving assembly and a counterweight assembly. The traction mechanism is arranged on the supporting section of the machine frame and comprises a left connecting rod unit and a right connecting rod unit, and alternate swinging is achieved through a special-shaped sliding groove set in a sliding plate. The fixing assembly is arranged on the platform section of the rack and converts alternate swing into alternate linear reciprocating motion. The switching assembly is arranged on the sliding plate, and switching between a passive guiding mode and an active training mode is achieved through connection between the switching assembly and different installation bases. The driving assembly drives the skateboard to move in the passive mode, and the counterweight assembly provides training resistance in the active mode. The device can adapt to requirements of different stages of neural function rehabilitation, passive guiding training is provided in the stage of innervation ability weakness, active training is provided in the stage of innervation ability recovery, and seamless connection from passive guiding to active training is achieved.

Description

Technical Field

[0001] This invention relates to the field of neuromedical device technology, specifically to a lower limb nerve function rehabilitation training device. Background Technology

[0002] The core difference between neurological rehabilitation and traditional limb motor rehabilitation lies in the fact that its goal is not simply to restore muscle strength or joint range of motion, but to rebuild damaged neural pathways and central control capabilities. Functional electrical stimulation (FES) induces functional muscle movement by simulating human neural electrical signals, effectively activating neural plasticity and promoting the central nervous system's relearning of limb movements. It is suitable for motor dysfunction caused by stroke, spinal cord injury, peripheral nerve injury, etc.

[0003] The recovery of neuromuscular control is a gradual and dynamic process, clearly divided into two core stages in clinical rehabilitation practice: the early stage is characterized by weak neuromuscular control, where patients' muscles cannot contract effectively or even control limb movements voluntarily. In this stage, passive guidance is needed to maintain joint range of motion, prevent muscle atrophy and tendon contractures, and stimulate neuroplasticity to lay the foundation for neural pathway reconstruction. The later stage is characterized by the gradual recovery of neuromuscular control, where patients can produce some voluntary muscle contractions. In this stage, targeted active training is needed to strengthen neuromuscular coordination and promote further remodeling of neural pathways, ultimately leading to the recovery of voluntary motor function.

[0004] For example, Chinese invention patent CN111068255A discloses a comprehensive training device for hemiplegic lower limbs. This device can fix the patient's foot to a foot fixation plate. The tilt angle between the foot and the plate can be adjusted by a cylinder. The front and rear leg support components can fix the upper part of the patient's lower leg on the affected side. Combined with the foot tilted and fixed to the foot fixation plate, the weight-bearing capacity of the ankle on the affected side is increased by lifting the other leg. This can exercise the calf muscles above the Achilles tendon and the foot muscles to activate weak or contracted muscles and improve the patient's leg support capacity. The three lifting platforms at the front of the foot fixation components can apply different weights to the affected leg. The seat lifting mechanism can lift the patient who is sitting on the seat at an angle to assist the patient in standing up independently for training. Therefore, patients can use this training device for independent training, which is more targeted, has better training effect, and can shorten the patient's rehabilitation time.

[0005] Analysis of the inventions and existing technologies revealed that current rehabilitation equipment focuses on strength training and lacks a comprehensive device that can adapt to the dynamic recovery process and achieve a seamless transition from passive guidance to active training, thus meeting the personalized needs of different rehabilitation stages. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a lower limb neurological function rehabilitation training device. This addresses the technical problem mentioned in the background art, where existing rehabilitation equipment focuses on strength training and lacks a comprehensive device that can adapt to the dynamic recovery process and achieve a seamless transition from "passive guidance to active training," thus meeting the personalized needs of different rehabilitation stages.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lower limb nerve function rehabilitation training device, comprising: The frame includes a platform section and a support section; A traction mechanism is provided on the support section. The traction mechanism includes two linkage units, left and right. The two linkage units can be driven by the slide plate in the control assembly. The slide plate includes a sliding section, a first mounting base and a second mounting base. The two linkage units can swing alternately under the drive of the sliding section and the guidance of the irregular sliding groove group. Two fixed components are provided, both of which can be slidably arranged on the platform section and connected to the two linkage units respectively, which can convert the alternating swing of the traction mechanism into alternating linear reciprocating motion; A switching component is disposed on the slide plate, and the switching component includes a switching element; A drive assembly, mounted on the support section, is used to drive the slide plate to slide; A counterweight assembly is arranged on the frame, and one end is connected to the switching component; When the switching component is fixedly connected to the first mounting base, the drive assembly can drive the skateboard to move; When the switching element is fixedly connected to the second mounting base, the drive assembly cannot drive the skateboard to move.

[0008] Furthermore, the linkage unit includes: A lifting slider is slidably mounted on the support section. A first groove is provided at the end of the lifting slider away from the sliding plate, and a guide rod is provided at the end of the lifting slider near the sliding plate. The swing arm is rotatably mounted on the support section. Both ends of the swing arm are provided with slide bars. The slide bars near the lifting slider can slide in the first slide groove.

[0009] Furthermore, the irregularly shaped groove assembly includes: The lifting slide is provided in two sets, which are inclined and opposite to each other on the slide plate, and the two guide rods can slide in the two lifting slides respectively.

[0010] Furthermore, the irregularly shaped groove assembly also includes: There are two locking slides, both horizontally opened on the slide plate. One locking slide is located between and connected to the two lifting slides, and the other locking slide is located outside and connected to the lifting slide. The guide rod can slide within the irregular slide group composed of the locking slide and the lifting slide.

[0011] Furthermore, the fixing component includes: There are two pedal components, both of which can be slidably mounted on the platform section. A second sliding groove is provided at the end of the pedal component near the connecting rod unit, and the sliding bar of the swing arm component at the end near the pedal component can slide within the second sliding groove. A backrest block is positioned at the end of the pedal component away from the second slide groove; At least one set of straps is provided and arranged between the second slide and the backrest block, which can secure the user's feet to the pedal.

[0012] Furthermore, the strap includes a hook and loop fastener A side and a hook and loop fastener B side that can be hooked together.

[0013] Furthermore, the switching component also includes: Two through holes are provided, respectively arranged on the first mounting base and the second mounting base; A first threaded hole is provided on the switching component, and the first threaded hole is coaxially aligned with the two through holes. A semi-threaded groove is formed on the switching member; and A semi-circular groove is formed on the first mounting base and can form a concentric circle with the semi-threaded groove.

[0014] Furthermore, the driving component includes: The motor is mounted on the support section; and The threaded rod is fixedly mounted on the output shaft of the motor, coaxial with the semi-circular groove, and can be screwed into the semi-threaded groove.

[0015] Furthermore, the counterweight assembly includes: A counterweight frame is installed on the frame. Multiple stacked counterweight blocks are slidably arranged inside the counterweight frame. Each counterweight block is also provided with a second threaded hole. A fixing nut is connected to the switching component via a rope; and The bolt is detachably mounted on the counterweight and can be screwed into the second threaded hole and the fixing nut.

[0016] Furthermore, the skateboard is also equipped with a manual pull ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This device, through its switchable component design, allows for rapid connection / disconnection of the drive component and the skateboard, thereby switching between passive guided training and active training modes. Without requiring equipment replacement, it adapts to the full-cycle rehabilitation needs of patients, from weak to strong neuromuscular control abilities, addressing the technical pain points of existing rehabilitation equipment that suffer from functional fragmentation and inability to adapt to changes in rehabilitation stages. In the passive guided phase, precise passive flexion and extension of the lower limbs are achieved through motor drive, avoiding the uneven force and inconsistent standards of manual operation. In the active training phase, the resistance adjustment of the counterweight component allows for precise adaptation of active training intensity, strengthening the reconstruction of neuromuscular coordinated control pathways.

[0018] 2. The traction mechanism adopts a composite transmission structure of "slide plate with irregularly shaped groove assembly + lifting slider + swing arm component". Through the horizontal sliding of the slide plate, the vertical movement of the lifting slider and the swing angle of the swing arm component are precisely controlled, thereby achieving the horizontal reciprocating linear motion of the pedal component. This results in high transmission precision and stable movement, allowing for precise control of the flexion and extension amplitude and speed of lower limb training, meeting the requirements of precise training parameters in neurorehabilitation. Simultaneously, the lifting and locking grooves of the irregularly shaped groove assembly cooperate to ensure smooth sliding of the guide rod, preventing movement jamming and improving training safety. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a three-dimensional structural diagram of a lower limb nerve function rehabilitation training device provided by the present invention; Figure 2 A three-dimensional view of a skateboard in a lower limb nerve function rehabilitation training device provided by the present invention; Figure 3 A perspective view of a switching component in a lower limb nerve function rehabilitation training device provided by the present invention; Figure 4 A perspective view of a lifting slider in a lower limb nerve function rehabilitation training device provided by the present invention; Figure 5 A perspective view of the swing arm component in a lower limb nerve function rehabilitation training device provided by the present invention; Figure 6 A perspective view of the pedal component in a lower limb nerve function rehabilitation training device provided by the present invention; Figure 7 This is an enlarged schematic diagram of the counterweight component in a lower limb nerve function rehabilitation training device provided by the present invention; Figure 8This is a three-dimensional view of a counterweight in a lower limb nerve function rehabilitation training device provided by the present invention.

[0021] Figure label: 101. Frame; 102. Platform section; 103. Support section; 104. Slide plate; 105. Sliding section; 106. First mounting base; 107. Second mounting base; 108. Irregularly shaped slide rail assembly; 109. Lifting slide rail; 110. Locking slide rail; 201. Switching component; 202. Lifting slider; 203. First slide groove; 204. Guide bar; 205. Swing arm component; 206. Slide bar; 207. Pedal component; 208. Second slide groove; 209. Backrest block; 210. Strap; 211. Velcro A side; 212. Velcro B side; 301. Through hole; 302. First threaded hole; 303. Semi-threaded groove; 304. Semi-circular groove; 305. Motor; 306. Threaded rod; 401. Counterweight frame; 402. Counterweight block; 403. Second threaded hole; 404. Fixing nut; 405. Rope; 406. Bolt; 407. Manual pull ring. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0023] Example: like Figure 1 As shown, the present invention provides a lower limb nerve function rehabilitation training device, comprising seven main parts: a frame 101, a traction mechanism, a control component, a fixing component, a switching component, a drive component, and a counterweight component. The frame 101 is an integral support structure, including a platform section 102 and a support section 103, both of which are integrally formed steel structures with sufficient structural strength and stability. The platform section 102 is a horizontally arranged rectangular flat plate structure with two parallel linear slide rails on its upper surface for sliding connection of the fixing component. The support section 103 is a frame structure vertically fixed to one end of the platform section 102, used to mount the traction mechanism, drive component, and switching component. The support section 103 is provided with a vertical slide rail for sliding connection with the traction mechanism.

[0024] like Figure 1 , 2As shown, the control component includes a slide plate 104 and a set of irregularly shaped slide grooves 108. The slide plate 104 is a rectangular plate structure, consisting of a sliding section 105, a first mounting base 106, and a second mounting base 107. It is slidably mounted on a horizontal slide rail of the support section 103. The slide plate 104 is provided with the set of irregularly shaped slide grooves 108, which includes two sets of lifting slide grooves 109 and two locking slide grooves 110. The lifting slide grooves 109 are long, inclined through grooves. The two sets of lifting slide grooves 109 are inclined and opposite to each other on the left and right sides of the slide plate 104, and two guide rods 204 are slidably inserted into the two lifting slide grooves 109 respectively, forming a sliding connection with the slide plate 104. The locking slide grooves 110 are horizontal, long through grooves. One locking slide groove 110 is located between and communicates with the two lifting slide grooves 109, and the other locking slide groove is... The groove 110 is located outside and connected to the lifting slide 109. The guide rod 204 can slide within the irregularly shaped slide group 108 formed by the lifting slide 109 and the locking slide 110. In this way, when the slide 104 starts to move, the left lifting slide 109 applies an upward force to the guide rod 204, and the right lifting slide 109 applies a downward force to the guide rod 204, thereby realizing the alternating swing of the drive traction mechanism. In addition, a manual pull ring 407 is fixed on the slide 104, which makes it convenient for medical staff to manually push the slide 104. When both guide rods 204 are located in the locking slide 110, the force from the traction mechanism will not be able to drive the slide 104 (because at this time the force acts vertically on the locking slide 110 structure and jams, of course the drive component is not affected by this), which facilitates equipment transportation or daily cleaning.

[0025] like Figures 1 to 3 As shown, the switching assembly includes a switching element 201, a first mounting base 106, and a second mounting base 107. The switching element 201 is a rectangular block structure that can slide back and forth between the first mounting base 106 and the second mounting base 107. Both the first mounting base 106 and the second mounting base 107 are fixedly mounted on the slide plate 104. The side wall of the switching element 201 has a semi-threaded groove 303 (a semi-cylindrical groove with threads on the inner wall). Two through holes 301 are provided, one in the first mounting base of the slide plate 104 and the other in the second mounting base 107. On the first mounting base 106 and the second mounting base 107, two through holes 301 are coaxially aligned and their diameters are adapted to the outer diameter of the switching component 201. The first threaded hole 302 is opened at the center of the switching component 201 and its diameter is adapted to the outer diameter of the threaded rod 306 of the drive assembly. The semi-circular groove 304 is opened at the center of the first mounting base 106 and is coaxially aligned with the semi-threaded groove 303. The semi-circular groove 304 and the semi-threaded groove 303 are combined to form a complete cylindrical threaded groove, and its diameter is adapted to the outer diameter of the threaded rod 306.

[0026] like Figure 1 , 4As shown in Figure 5, the traction mechanism is located on the upper part of the support section 103 and is used to convert the power of the drive component into the reciprocating motion required for lower limb training. It includes two symmetrically arranged linkage units on the left and right sides. Each linkage unit consists of a lifting slider 202 and a swing arm 205. The lifting slider 202 is a rectangular block structure. The lifting slider 202 is slidably connected to the vertical slide rail of the support section 103 to achieve vertical sliding. A first groove 203 (a long strip-shaped through groove extending vertically along the lifting slider 202) is provided on the side of the lifting slider 202 away from the slide plate 104. A guide rod 204 (cylindrical metal rod with a smooth, burr-free surface) is vertically fixed on the side of the lifting slider 202 near the slide plate 104. The swing arm 205 is rotatably mounted on the upper middle part of the support section 103 via a pivot. Slide rods 206 (cylindrical structure, made of the same material as the guide rod 204) are vertically fixed at both ends of the swing arm 205. The slide rod 206 near the lifting slider 202 is slidably inserted into the first slide groove 203, forming a rotatable connection with the lifting slider 202, so as to realize the relative sliding between the swing arm 205 and the lifting slider 202 when the swing arm 205 swings.

[0027] like Figure 1 , 6 Two fixing components are provided, corresponding to the left and right lower limbs of the human body respectively. Both are slidably arranged on the linear slide rail of the platform section 102, and each fixing component is connected to a corresponding linkage unit. They are used to fix the patient's lower limbs and transmit the movement of the traction mechanism. The components include a pedal 207, a backrest block 209, and a strap 210. The lower surface of the pedal 207 is slidably connected to the linear slide rail of the platform section 102 to achieve horizontal reciprocating sliding. A second slide groove 208 (a long strip-shaped through groove extending vertically along the pedal 207) is provided on the side of the pedal 207 near the linkage unit. The slide bar 206 of the swing arm 205 near the end of the pedal 207 is slidably inserted into the second slide groove 208. Inside the 8, a rotatable connection is formed with the pedal component 207. The backrest block 209 is an arc-shaped block structure, fixed to the end of the pedal component 207 away from the second slide groove 208, and integrally formed with the pedal component 207. It is used to support the patient's heel. There are two sets of straps 210, corresponding to the left and right lower limbs respectively. Each set of straps 210 consists of a Velcro A side 211 and a Velcro B side 212. The Velcro A side 211 is sewn to the upper surface of the pedal component 207, and the Velcro B side 212 is sewn to the body of the strap 210. The patient's foot is detachably fixed to the pedal component 207 through the Velcro hook. The straps 210 are made of elastic material to adapt to patients with different foot shapes and improve wearing comfort.

[0028] like Figure 1As shown, the drive assembly is installed on the upper part of the support section 103 to provide power for passive guided training. It includes a motor 305 and a threaded rod 306. The motor 305 is a stepper motor 305, which is fixed to the support section 103 by bolts 406. The threaded rod 306 is a cylindrical metal threaded rod, one end of which is fixedly connected to the output shaft of the motor 305. The threaded rod 306 is adapted to the circular groove formed by the combination of the semi-circular groove 304 and the semi-threaded groove 303. When the switching component 201 is fixed to the first mounting base 106, the threaded rod 306 is screwed to the switching component 201, which can drive the slide plate 104 to slide along the horizontal slide rail of the support section 103.

[0029] like Figure 1 , 7 As shown, the counterweight assembly is arranged on one side of the support section 103 of the frame 101 to adapt to the training needs of patients at different rehabilitation stages. It includes a counterweight frame 401, counterweight blocks 402, fixing nuts 404, and bolts 406. The counterweight frame 401 is a rectangular frame structure fixed to the support section 103. Its interior is a hollow cavity for holding the counterweight blocks 402. Multiple counterweight blocks 402 are rectangular metal blocks that can be stacked within the counterweight frame 401. The fixing nuts 404 are metal nuts. The traction rope is fixedly connected to the side wall of the switching component 201 (the position can be adjusted appropriately with rollers in the middle). The rope 405 is made of high-strength nylon rope with good toughness. The bolt 406 is a hexagonal bolt 406, which can be detachably inserted into the second threaded hole 403 of the counterweight 402. One end of the bolt 406 can be screwed to the fixing nut 404 to realize the connection between the counterweight 402 and the switching component 201. By increasing or decreasing the number of counterweights 402, the training resistance can be adjusted to meet the needs of the active training phase.

[0030] Specific usage and beneficial effects of the present invention: The patient sits in a chair facing the rack 101, with surface electrode patches of the neuromuscular electrical stimulator (Haobro-HB-SJ3, desktop host + surface electrodes) attached to their lower limbs. The left and right lower limbs are placed on the two pedal components 207 respectively, and the feet are fixed to the pedal components 207 by the straps 210. The backrest block 209 is adjusted to support the back of the heels to ensure that the limbs are in a comfortable and secure position. By switching the component, the patient can select the passive guided training mode (weak period of neural control) or the active training mode (mid-stage of neural control recovery). Through the design of the switching component, the connection / disconnection of the drive component and the slide 104 can be quickly realized, thereby switching between the passive guided training mode and the active training mode. Without changing the equipment, it can adapt to the patient's full-cycle rehabilitation needs from weak to strong neuromuscular control ability, solving the technical pain points of existing rehabilitation equipment that are functionally fragmented and unable to adapt to changes in rehabilitation stages. In the passive guidance phase, the lower limbs are precisely passively flexed and extended by the 305 motor, avoiding the problems of uneven force and inconsistent standards in manual operation. In the active training phase, the resistance adjustment of the counterweight components enables precise adaptation of the active training intensity and strengthens the reconstruction of the neuromuscular coordinated control pathway.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above. Modifications or improvements can be made to the present invention, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A lower limb nerve function rehabilitation training device, characterized in that, Including: The frame (101) includes a platform section (102) and a support section (103). A traction mechanism is provided on the support section (103). The traction mechanism includes two linkage units, left and right. The two linkage units can be driven by the slide plate (104) in the control assembly. The slide plate (104) includes a sliding section (105), a first mounting base (106), and a second mounting base (107). The two linkage units can swing alternately under the drive of the sliding section (105) and the guidance of the irregular groove group (108). Two fixed components are provided, both of which can be slidably arranged on the platform section (102) and connected to the two linkage units respectively, which can convert the alternating swing of the traction mechanism into alternating linear reciprocating motion; A switching component is disposed on the slide plate (104), and the switching component includes a switching element (201). A drive assembly, mounted on the support section (103), is used to drive the slide plate (104) to slide; A counterweight assembly is arranged on the frame (101), and one end is connected to the switching component (201); When the switching element (201) is fixedly connected to the first mounting base (106), the driving component can drive the sliding plate (104) to move; When the switching component (201) is fixedly connected to the second mounting base (107), the drive assembly cannot drive the slide plate (104) to move.

2. The lower limb nerve function rehabilitation training device according to claim 1, characterized in that, The linkage unit includes: A lifting slider (202) is slidably mounted on the support section (103). A first groove (203) is provided at the end of the lifting slider (202) away from the slide plate (104), and a guide rod (204) is provided at the end of the lifting slider (202) near the slide plate (104). The swing arm (205) is rotatably mounted on the support section (103). Both ends of the swing arm (205) are provided with slide bars (206). The slide bars (206) near the lifting slider (202) can slide in the first slide groove (203).

3. The lower limb nerve function rehabilitation training device according to claim 2, characterized in that, The irregularly shaped slide rail assembly (108) includes: Two sets of lifting slides (109) are provided, which are inclined to each other on the slide plate (104), and the two guide rods (204) can slide in the two lifting slides (109) respectively.

4. The lower limb nerve function rehabilitation training device according to claim 3, characterized in that, The irregularly shaped chute assembly (108) also includes: There are two locking grooves (110), both of which are horizontally opened on the slide plate (104). One of the locking grooves (110) is located between the two lifting grooves (109) and connects them. The other locking groove (110) is located outside the lifting groove (109) and connects with it. The guide rod (204) can slide in the irregular groove group (108) composed of the locking groove (110) and the lifting groove (109).

5. The lower limb nerve function rehabilitation training device according to claim 2, characterized in that, The fixing component includes: There are two pedal components (207), both of which can be slidably mounted on the platform section (102). The pedal component (207) has a second slide groove (208) at the end near the connecting rod unit. The slide bar (206) of the swing arm component (205) at the end near the pedal component (207) can slide in the second slide groove (208). A backrest block (209) is disposed at the end of the pedal component (207) away from the second slide groove (208); and At least one set of straps (210) are provided and arranged between the second slide (208) and the backrest block (209) to secure the user's feet to the pedal (207).

6. The lower limb nerve function rehabilitation training device according to claim 5, characterized in that: The strap (210) includes a hook and loop A side (211) and a hook and loop B side (212) that can be hooked together.

7. The lower limb nerve function rehabilitation training device according to claim 1, characterized in that, The switching component also includes: Two through holes (301) are provided, respectively arranged on the first mounting base (106) and the second mounting base (107); A first threaded hole (302) is provided on the switching member (201), and the first threaded hole (302) is coaxially aligned with the two through holes (301); A semi-threaded groove (303) is formed on the switching member (201); and A semicircular groove (304) is formed on the first mounting base (106) and can form a concentric circle with the semi-threaded groove (303).

8. The lower limb nerve function rehabilitation training device according to claim 7, characterized in that, The driving component includes: The motor (305) is mounted on the support section (103); and The threaded rod (306) is fixedly mounted on the output shaft of the motor (305), coaxial with the semicircular groove (304), and can be screwed into the semi-threaded groove (303).

9. The lower limb nerve function rehabilitation training device according to claim 1, characterized in that, The counterweight assembly includes: A counterweight frame (401) is installed on the frame (101). Multiple stacked counterweight blocks (402) are slidably arranged inside the counterweight frame (401). A second threaded hole (403) is also provided on the counterweight block (402). A fixing nut (404) is connected to the switching element (201) via a rope (405); and Bolt (406) is detachably mounted on the counterweight (402) and can be screwed into the second threaded hole (403) and the fixing nut (404).

10. A lower limb nerve function rehabilitation training device according to claim 1, characterized in that: The skateboard (104) is also equipped with a manual pull ring (407).

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