Lower limb coordination training device

Abstract

The present application relates to the technical fields of lower limbs training device, and particularly relates to a lower limbs coordination training device. The lower limbs coordination training device comprises a base and a sliding module, the sliding module comprises a foot support located above the base and a friction structure arranged at the bottom of the foot support, the base is provided with a slide for the sliding module to move along a set direction during the lower limbs coordination training, the friction structure comprises a rolling part located in the slide and a supporting part supported on the opening edge of the upper side of the slide, the supporting part and the upper surface of the base satisfy a set sliding friction contact area, and the width of the slide is greater than the outer diameter of the rolling part so that the rolling part and the sidewall in the width direction of the slide form rolling friction when the sliding module moves along the slide. While ensuring the guiding cooperation between the sliding module and the slide and avoiding large friction, the direction of the lower limbs of the patient can be controlled while realizing small friction, which is beneficial to ensure the training effect.

Description

Technical Field

[0001] This invention relates to the field of training devices for the lower limbs, and more specifically to a lower limb coordination training device. Background Technology

[0002] Currently, some patients treated in the hospital's rehabilitation department suffer from limb coordination disorders due to cerebellar or brainstem hemorrhage affecting their limb coordination. This manifests as ataxia, characterized by disordered range and coordination of voluntary limb movements. Patients with lower limb ataxia often experience difficulty taking a precise step forward during rehabilitation, and some are even unable to maintain basic daily living abilities, such as standing or walking independently. This severely impacts their functional recovery and their confidence in rehabilitation.

[0003] Currently, the method for coordination training in patients with ataxia involves having the patient sit with both feet on a training table. The patient sits on a chair or bedside, while the training table is placed on the floor. The table surface is covered with a friction pad. The patient performs lower limb extension, adduction, lateral adduction, abduction, and circular movements with both feet on the table. The friction pad simulates a certain level of frictional resistance during foot movement to ensure training effectiveness. However, many patients wear shoes when using this training table. When performing lower limb adduction and abduction movements while seated, the friction between the shoes and the table surface is relatively high, making it difficult for patients to complete the movements smoothly. This is especially true for patients with lower limb muscle strength below grade 3, hindering training and affecting lower limb coordination.

[0004] There are also training devices with low friction in the prior art, such as a coordination trainer disclosed in Chinese utility model patent with authorization announcement number CN206881028U. It has multiple rotating shafts arranged in parallel on a fixed frame, and multiple balls are fitted on each rotating shaft. Each ball forms a support platform for supporting the patient's feet. The patient's feet can step on the balls. When the lower limbs move, the balls rotate with them, forming rolling friction relative to the entire sole of the patient's feet, which can reduce friction.

[0005] However, in the aforementioned lower limb coordination training device, the entire support platform is made up of ball bearings. During patient training, the rotation of each ball bearing makes it difficult for the patient's lower limbs to move in the set direction, and the movement trajectory is not easy to control, thus affecting the training effect. Summary of the Invention

[0006] The purpose of this invention is to provide a lower limb coordination training device to solve the problem that current lower limb coordination training devices that use ball bearings as the training platform are difficult to control in terms of direction during patient lower limb movements, thus affecting the training effect.

[0007] The technical solution of the lower limb coordination training device of the present invention is as follows: A lower limb coordination training device includes a base and a sliding module. The sliding module includes a footrest located above the base and a friction structure disposed at the bottom of the footrest. The base is provided with a slide for the sliding module to move along a set direction during lower limb coordination training. The friction structure includes a rolling part located in the slide and a support part supported on the upper side opening edge of the slide. The support part and the upper surface of the base satisfy a set sliding friction contact area. The rolling part can rotate relative to the footrest with the rotation axis in the up-down direction. The width of the slide is greater than the outer diameter of the rolling part so that when the sliding module moves along the slide, the rolling part forms rolling friction with one side wall in the width direction of the slide.

[0008] Beneficial Effects: This invention innovatively provides a lower limb coordination training device suitable for patients with insufficient muscle strength, allowing them to train along a set trajectory. It utilizes a slide rail on the base to guide the movement of the sliding module. Simultaneously, the friction structure of the sliding module, which works in conjunction with the slide rail to create sliding and rolling friction, maintains a certain level of friction required during training without excessive friction. During lower limb coordination training, the patient places their foot on the footrest of the sliding module and performs corresponding training movements. The sliding module moves with the foot. Because the rolling part of the friction structure at the bottom of the sliding module is located within the slide rail, the sliding module is guided by the slide rail, allowing the patient's foot to move along... The sliding track's extended direction allows for control of lower limb movement. Simultaneously, the friction structure's support rests on the edge of the upper opening of the sliding track on the base's upper surface. As the sliding module moves, it forms sliding friction with the base's upper surface. The designed sliding friction contact area ensures appropriate friction. Meanwhile, the rolling part of the friction structure forms rolling friction with one side wall of the sliding track's width direction as the sliding module moves. This ensures a guiding fit between the sliding module and the track while avoiding excessive friction. This achieves low friction while allowing for control of the patient's lower limb movement, thus enhancing training effectiveness.

[0009] Furthermore, the friction structure includes a rotating body that can rotate relative to the footrest. The rotation axis of the rotating body extends vertically. Both the rolling part and the support part are disposed on the rotating body. The outer diameter of the support part is larger than the outer diameter of the rolling part. When the sliding module moves along the slide, both the support part and the rolling part rotate.

[0010] Furthermore, the friction structure also includes a limiting part disposed on the rotating body. The limiting part is located below the rolling part, and the outer diameter of the limiting part is larger than the outer diameter of the rolling part. The supporting part, the rolling part and the limiting part form an annular groove. The slide has a guide edge located in the annular groove. The supporting part and the limiting part form a limiting on the upper and lower sides of the guide edge, respectively.

[0011] Furthermore, the friction structure includes a fixed shaft fixed to the bottom of the footrest and a bearing mounted on the fixed shaft, the outer ring of the bearing constituting the rotating body.

[0012] Furthermore, the friction structure includes a limiting part located below the rolling part, the outer diameter of the limiting part being larger than the outer diameter of the rolling part, and the slide having a guide edge located between the support part and the limiting part, with the support part and the limiting part forming limits on the upper and lower sides of the guide edge, respectively.

[0013] Furthermore, the base has at least two parallel extending slides.

[0014] Furthermore, among the various tracks on the base, there are straight tracks and curved tracks.

[0015] Furthermore, the curved slide connects smoothly with the straight slide that extends in the front-to-back direction.

[0016] Furthermore, each of the slides on the base includes slides that extend in a straight line in the left-right direction and slides that extend in a straight line in the front-back direction, with the slides extending in a straight line in the left-right direction and the slides extending in a straight line in the front-back direction intersecting each other.

[0017] Furthermore, the base has a hollow cavity structure, a top plate and a fixing structure for fixing the top plate, a guide hole that runs vertically through the top plate, a slide rail formed at the location of the guide hole on the base, and a space located below the top plate for avoiding friction structures. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the lower limb coordination training device from an upper view according to an embodiment of the present invention; Figure 2 for Figure 1 Top view of the lower limb coordination training device in the middle; Figure 3 for Figure 1 A perspective view of the lower limb coordination training device in the image; Figure 4 for Figure 1 A structural schematic diagram of the lower limb coordination training device from a lower side view. Figure 5 for Figure 1 A schematic diagram of the sliding module in the middle; Figure 6 for Figure 5 A schematic diagram of the friction structure of the sliding module from the top view; Figure 7 for Figure 5 A schematic diagram of the friction structure of the sliding module from the bottom view.

[0019] In the diagram: 100, base; 11, transverse straight slide; 12, longitudinal straight slide; 13, curved slide; 14, top plate; 15, side plate; 16, reinforcing plate; 200, sliding module; 21, foot support; 22, fixed shaft; 23, bearing; 231, rolling part; 232, support part; 233, limiting part; 24, snap ring. Detailed Implementation

[0020] The basic concept of the lower limb coordination training device of the present invention is to guide the movement of the sliding module by using the slide rail on the base, and at the same time, to use the friction structure of the sliding module that can cooperate with the slide rail to form sliding friction and rolling friction to maintain a certain amount of friction required during training without making the friction too large, so as to ensure the training effect.

[0021] The technical solution of the present invention will be specifically described below with reference to the embodiments.

[0022] Embodiments of the lower limb coordination training device of the present invention: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the lower limb coordination training device includes a base 100 and a sliding module 200. The sliding module 200 includes a footrest 21 located above the base 100 and a friction structure provided at the bottom of the footrest 21. The base 100 is provided with a slide for the sliding module 200 to move along a set direction during lower limb coordination training. The friction structure includes a rolling part 231 located in the slide and a support part 232 supported on the upper side opening edge of the slide. The support part 232 and the upper surface of the base 100 satisfy a set sliding friction contact area. The rolling part 231 can rotate relative to the footrest 21 and the rotation axis is in the up and down direction. The width of the slide is greater than the outer diameter of the rolling part 231 so that when the sliding module 200 moves along the slide, the rolling part 231 forms rolling friction with one side wall in the width direction of the slide.

[0023] The sliding module 200 is guided by a slide rail on the base 100. Simultaneously, the friction structure of the sliding module 200, which works in conjunction with the slide rail to create sliding and rolling friction, maintains a certain level of friction required during training without excessive friction. During lower limb coordination training, the patient places their foot on the footrest 21 of the sliding module 200 and performs corresponding training movements. The sliding module 200 moves with the foot. Because the rolling part 231 of the friction structure at the bottom of the sliding module 200 is located within the slide rail, the sliding module 200 is guided by the slide rail, allowing the patient's foot to move along the set extension direction of the slide rail. This allows control over the direction of lower limb movements. Simultaneously, the support part 232 of the friction structure is supported on the edge of the upper opening of the slide rail on the upper surface of the base 100, and moves with the sliding module 200. Sliding friction is formed with the upper surface of the base 100. The set sliding friction contact area can achieve a suitable friction force, avoiding excessive friction. At the same time, the rolling part 231 of the friction structure abuts against one side wall in the width direction of the slide track as the sliding module 200 moves, forming rolling friction. While ensuring that the sliding module 200 and the slide track form a guiding fit, excessive friction is avoided. In this way, while achieving low friction, the direction of the patient's lower limb movement can be controlled, which is conducive to ensuring the training effect and is suitable for patients with insufficient muscle strength to train according to the set trajectory.

[0024] To accommodate different lower limb movements, the base 100 is equipped with various sliding tracks extending in different directions: a horizontal straight track 11 extending in a straight line along the left-right direction, a vertical straight track 12 extending in a straight line along the front-back direction, and a curved track 13 extending in a curved direction. The horizontal straight track 11 can accommodate the patient's left-right movements of the lower limbs, the vertical straight track 12 can accommodate the patient's front-back movements of the lower limbs, and the curved track 13 can accommodate the patient's circular movements of the lower limbs. The sliding module 200 moves along the corresponding track as the patient's lower limbs move. The footrest 21 of the sliding module 200 has an upward-facing groove into which the patient's foot can be placed. To facilitate the application of force, a strap can also be provided on the footrest 21 to fix the patient's foot to the footrest 21.

[0025] The footrest 21 is horizontally positioned with a flat bottom surface. A friction structure is located at the center of the bottom surface of the footrest 21. The friction structure includes a fixed shaft 22 fixed to the bottom of the footrest 21 and a bearing 23 mounted on the fixed shaft 22. Figure 6 , Figure 7The top of the central shaft is fixedly connected to the bottom surface of the foot support 21, which can be achieved by welding. The axis of the central shaft is vertical. The bearing 23 has an outer ring, an inner ring, and rolling elements between the inner and outer rings. The axis of the bearing 23 is vertical. The inner ring is interference-fitted onto the fixed shaft 22. A retaining ring 24 is installed at the end of the central shaft passing downward through the inner ring of the bearing 23. The retaining ring 24 can limit the inner ring of the bearing 23 without affecting the rotation of the outer ring. The outer ring of the bearing 23 is provided with a rolling part 231 and a support part 232. The outer ring can roll on the side wall of the slide, resulting in low frictional resistance.

[0026] The outer ring of bearing 23 forms a rotating body that can rotate relative to footrest 21. The axis of rotation of the rotating body extends vertically. Both the rolling part 231 and the support part 232 are disposed on the rotating body. The outer diameter of the support part 232 is larger than the outer diameter of the rolling part 231. When the sliding module 200 moves along the slide rail, both the support part 232 and the rolling part 231 rotate. Making the support part 232 and the rolling part 231 an integral structure simplifies the structure and facilitates manufacturing. When the support part 232 moves relative to the base 100, it rotates and slides simultaneously, resulting in uniform wear and improved service life. Directly utilizing the outer ring of bearing 23 to form the rolling part 231 and the support part 232 reduces the radial dimension of the friction structure and simplifies the installation structure. In other embodiments, the support part and the rolling part can be separately disposed. In this case, the outer ring of the bearing serves as the rolling part, while the support part is a ring and is separately fixed to the bottom surface of the footrest. The support part does not rotate with the rolling part. In other embodiments, instead of forming the support and rolling parts directly on the outer ring of the bearing, a sleeve is provided separately, which is fixedly fitted onto the outer ring of the bearing, and support and rolling parts with different outer diameters are provided on the sleeve.

[0027] The friction structure also includes a limiting part 233 disposed on the rotating body. The limiting part 233 is located below the rolling part 231, and the outer diameter of the limiting part 233 is larger than the outer diameter of the rolling part 231. The supporting part 232, the rolling part 231, and the limiting part 233 form an annular groove. The slide has a guide edge located within the annular groove. The supporting part 232 and the limiting part 233 respectively form limits on the upper and lower sides of the guide edge, which can hold the rotating body in the slide. In other embodiments, the limiting part may be omitted, or the limiting part may be a separately disposed limiting ring, which is fixed on the fixed shaft and does not rotate with the rolling part.

[0028] In this embodiment, an annular groove is machined on the outer circumferential surface of the outer ring of the bearing 23. The annular groove surrounds the axis of the bearing 23. The portion of the outer ring of the bearing 23 located on the upper side of the annular groove constitutes a support portion 232, and the portion located on the lower side of the annular groove constitutes a limiting portion 233. The outer diameters of the support portion 232 and the limiting portion 233 are the same. The bottom of the annular groove constitutes a rolling portion 231. The vertical width of the annular groove is adapted to the vertical thickness of the guide edge of the slide. The axial dimensions of the support portion 232 and the limiting portion 233 are the same and smaller than the axial dimension of the rolling portion 231. The horizontal dimensions of the support portion 232 and the limiting portion 233 are much smaller than the horizontal dimension of the bottom surface of the footrest 21. After the bearing 23 is installed in the slide, the guide edges on both sides of the slide in the width direction are engaged in the annular groove. The support part 232 rests on the upper surface of the base 100 at the edge of the upper opening of the slide. The limiting part 233 is engaged on the lower side of the guide edge of the slide. Both the support part 232 and the limiting part 233 are annular. A small part of the support part 232 and the limiting part 233 contact the guide edge of the slide to avoid excessive friction.

[0029] Since the outer diameter of the rolling part 231 is slightly smaller than the width of the slide, when the patient performs lower limb coordination training, the sliding module 200 is subjected to force by the patient's foot, and the outer ring of the bearing 23 abuts against one side wall in the width direction of the slide, with a gap between it and the other side wall, which can ensure smooth rolling. For the bearing 23 to be installed in the slide, a through-hole can be provided at the end of the slide, the hole is connected to the slide, and the diameter of the hole is adapted to the maximum outer diameter of the bearing 23, so that the bearing 23 of the sliding module 200 is installed from top to bottom into the hole and slides horizontally into the slide, and then the hole is sealed with a sealing plate; or, the slide can be made to have a side opening that extends to the vertical side of the base 100, so that the bearing 23 of the sliding module 200 is installed from the side opening, and then a cover plate is fixedly installed to block the side opening.

[0030] The base 100 has a square structure with a hollow interior. It includes a top plate 14 and a fixing structure for securing it. The fixing structure comprises side plates 15 and reinforcing plates 16. There are four side plates 15, forming the four vertical side walls of the base 100 (front, back, left, and right). Multiple reinforcing plates 16 are arranged in a crisscross pattern, with one horizontal reinforcing plate and multiple vertical reinforcing plates 16. Each reinforcing plate 16 is fixed at both ends to two corresponding side plates 15, and its upper end is fixedly connected to the top plate 14. The upper surface of the top plate 14 forms the upper surface of the base 100. The top plate 14 has a through-hole, forming a slide rail at the location of the through-hole. The hollow structure provides space below the top plate 14 for avoiding friction structures. The edge of the through-hole on the top plate 14 forms a guide edge. Using the opening in the top plate 14 to form the slide rail simplifies the structure and reduces the weight of the base 100. In other embodiments, a slide can be formed by opening a groove in a solid base. The groove is an inverted T-shaped groove with a small opening and a large belly, and the constricted part at the opening of the groove forms a guide edge.

[0031] The base 100 has two parallel horizontal straight slides 11. On the left side of the base 100, there are two parallel vertical straight slides 12 and two parallel curved slides 13. On the right side of the base 100, there are two parallel vertical straight slides 12 and two parallel curved slides 13. The curved slides 13 extend along an arc, and the arcs of the two parallel curved slides 13 are concentric. Two sliding modules 200 are installed on the base 100, allowing for simultaneous training of both feet. The left sliding module 200 can utilize the two vertical straight slides 12 and two curved slides 13 on the left side for training, and the right sliding module 200 can utilize the two vertical straight slides 12 and two curved slides 13 on the right side for training. Both sliding modules 200 can also utilize the two horizontal straight slides 11 for lower limb coordination training. The parallel slides on both sides allow for a wider range of lower limb coordination training movements. In other embodiments, a longitudinal straight slide and a curved slide can be provided on the left and right sides respectively, or more than three parallel slides can be provided as needed.

[0032] The horizontal straight slide 11 and the vertical straight slide 12 are straight tracks, while the curved slide 13 is an arc-shaped track. The two curved slides 13 on the left and right are symmetrical. The straight and curved slides 13 can accommodate different lower limb coordination training movements. In other embodiments, only straight slides may be provided.

[0033] The longitudinal straight slide 12 extends in a straight line along the front-to-back direction. The curved slide 13 corresponds one-to-one with the longitudinal straight slide 12 and connects smoothly. The front end of the curved slide 13 connects to the front end of the longitudinal straight slide 12. The corresponding sliding module 200 can switch between different slides to adapt to different training movements. In other embodiments, the slides can be set separately and not connected, so that each slide is equipped with a sliding module to meet the training movements.

[0034] The transverse straight slide 11 extends in a straight line along the left-right direction, and the longitudinal straight slide 12 extends in a straight line along the front-back direction. All slides on the base 100 are interconnected. The transverse straight slide 11 and the longitudinal straight slide 12 are arranged intersectingly. The sliding module 200 can switch between different slides to facilitate corresponding training movements on different slides. In other embodiments, the transverse and longitudinal straight slides can be set separately and not connected, thus allowing corresponding sliding modules to be configured on the transverse and longitudinal straight slides respectively to meet the training movements.

[0035] Since the slide rails are machined directly on the top plate 14, cutting can be used to separate the portion of the top plate 14 located between two adjacent longitudinal straight slide rails 12 and two transverse straight slide rails 11 from the rest. At this point, the reinforcing plate 16 on the lower side of the top plate 14 can be used to fix the portion enclosed between the two longitudinal straight slide rails 12 and the two transverse straight slide rails 11. The reinforcing plate 16 has clearance notches corresponding to the slide rails to create space for the friction structure to avoid interference with the bearing 23. When the friction structure of the sliding module 200 moves to the transverse straight slide rails 11 and longitudinal straight slide rails 12, it will not detach from the slide rails due to the large outer diameters of the support portion 232 and the limiting portion 233. To improve smoothness during passage, rounded corners can be provided at the edges of the slide rails, support portion 232, and limiting portion 233 to prevent jamming.

[0036] In use, the patient sits with the device placed on the ground. The patient places both feet on the device, which is fixed to the footrests 21 of the two sliding modules 200. During adduction and abduction exercises, the rolling bearings 23 eliminate friction, allowing patients with insufficient muscle strength and coordination disorders to complete the training smoothly. Patients can also slide their feet back and forth or make circles on the flat surface with their feet, without needing to complete the entire circle. This lower limb coordination training device enables patients with low lower limb muscle strength to effectively complete lower limb coordination training.

[0037] Furthermore, a sensor can be installed at the friction structure to detect the number of rotations of the bearing's outer ring, and a display connected to the sensor can be installed on the footrest. The displacement is obtained by counting the rotations and displayed, which can help determine the training intensity. A music player can also be installed on the base to play music needed during training.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lower limb coordination training device, characterized in that, The device includes a base and a sliding module. The sliding module includes a footrest located above the base and a friction structure at the bottom of the footrest. The base has a slide for the sliding module to move in a set direction during lower limb coordination training. The friction structure includes a rolling part located in the slide and a support part supported on the upper side opening edge of the slide. The support part and the upper surface of the base satisfy a set sliding friction contact area. The rolling part can rotate relative to the footrest with the rotation axis in the up-down direction. The width of the slide is greater than the outer diameter of the rolling part so that when the sliding module moves along the slide, the rolling part forms rolling friction with one side wall in the width direction of the slide.

2. The lower limb coordination training device according to claim 1, characterized in that, The friction structure includes a rotating body that can rotate relative to the footrest. The rotation axis of the rotating body extends vertically. Both the rolling part and the support part are disposed on the rotating body. The outer diameter of the support part is larger than the outer diameter of the rolling part. When the sliding module moves along the slide, both the support part and the rolling part rotate.

3. The lower limb coordination training device according to claim 2, characterized in that, The friction structure also includes a limiting part disposed on the rotating body. The limiting part is located below the rolling part, and the outer diameter of the limiting part is larger than the outer diameter of the rolling part. The supporting part, the rolling part and the limiting part form an annular groove. The slide has a guide edge located in the annular groove. The supporting part and the limiting part form a limit on the upper and lower sides of the guide edge, respectively.

4. The lower limb coordination training device according to claim 2 or 3, characterized in that, The friction structure includes a fixed shaft fixed to the bottom of the footrest and a bearing mounted on the fixed shaft, with the outer ring of the bearing forming the rotating body.

5. The lower limb coordination training device according to claim 1 or 2, characterized in that, The friction structure includes a limiting part located below the rolling part. The outer diameter of the limiting part is larger than the outer diameter of the rolling part. The slide has a guide edge located between the support part and the limiting part. The support part and the limiting part form limits on the upper and lower sides of the guide edge, respectively.

6. The lower limb coordination training device according to claim 1, 2, or 3, characterized in that, The base has at least two parallel tracks.

7. The lower limb coordination training device according to claim 1, 2, or 3, characterized in that, The various tracks on the base include straight tracks and curved tracks.

8. The lower limb coordination training device according to claim 7, characterized in that, The curved slide connects smoothly with the straight slide that extends in the front-to-back direction.

9. The lower limb coordination training device according to claim 1, 2, or 3, characterized in that, The base has slides that extend in a straight line in the left-right direction and slides that extend in a straight line in the front-back direction. The slides that extend in a straight line in the left-right direction and the slides that extend in a straight line in the front-back direction are arranged to intersect.

10. The lower limb coordination training device according to claim 1, 2, or 3, characterized in that, The base has a hollow cavity structure, a top plate and a fixing structure for fixing the top plate. The top plate has a guide hole that runs vertically through it. The part of the base with the guide hole forms a slide. The hollow cavity structure has space located below the top plate to avoid friction structures.

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