Ankle joint treatment type walking brace based on magnetic field retraction

Abstract

The invention provides an ankle joint treatment type walking brace based on magnetic field retraction. The ankle joint treatment type walking brace comprises a shank fixing part, an ankle bearing part and a magnetic retraction mechanism. The shank fixing part comprises an external supporting frame and a flexible liner; the ankle bearing part comprises an external bearing frame and a flexible liner; the magnetic retraction mechanism comprises an inner side magnetic field module and an outer side magnetic field module, and the introversion and the extroversion of the ankle joint are corrected through the magnetic force difference between the inner side and the outer side; the inner side magnetic field module and the outer side magnetic field module each comprise an upper magnetic field unit and a lower magnetic field unit, the upper magnetic field units are fixedly connected to the shank fixing part, and the lower magnetic field units are fixedly connected to the ankle bearing part; the magnetic field directions of the upper magnetic field unit and the lower magnetic field unit oppositely generate repulsive force to exert a retraction effect on the ankle joint; the walking brace not only has an ankle joint retraction function and a force line correction function, reduces ankle load to enable a patient with ankle trauma or fracture to go down the ground with early load, but also can improve joint microcirculation and relieve inflammation and pain through the action of a magnetic field.

Description

Technical Field

[0001] The present application relates to the technical field of foot and ankle rehabilitation walking braces, and specifically to an ankle joint therapeutic walking brace based on magnetic field traction, which is suitable for ankle arthritis treatment, foot and ankle trauma rehabilitation, and force line correction and function improvement during the postoperative recovery period. Background Art

[0002] Ankle osteoarthritis (AOA) refers to a type of disease caused by a variety of reasons, with clinical manifestations such as degeneration and desquamation of ankle cartilage, subchondral bone sclerosis and hyperplasia, narrowing of the joint space, and necrosis of the talus. The global incidence of ankle osteoarthritis in adults is about 1% [Barg A, Pagenstert GI, Hügle T, et al: Ankleosteoarthritis: Etiology, diagnostics, and classification. Foot Ankle Clin 2013; 18(3): 411-426]. Unlike hip and knee osteoarthritis, ankle osteoarthritis is usually caused by trauma, and the onset of symptoms may be 12-15 years earlier than in hip or knee osteoarthritis [Pagenstert G, Leumarm A, Hintermann B, et al. Sports and recreation activity of varus and valgus ankle osteoarthritis before and after realignment surgery. Foot Ankle Int, 2008, 29 (10): 985-993]. Chronic ankle instability is a common cause of ankle arthritis. About 70%-80% of patients with ankle arthritis have inversion or valgus deformity of the ankle Achilles tendon, of which more than 50% have inversion deformity. In ankle arthritis, the abnormal load-bearing line of the tibiotalar joint will lead to increased local load, which will accelerate cartilage wear and aggravate inflammation, further leading to narrowing of the joint space.

[0003] Ankle fractures are another important cause of ankle dysfunction. There are many types of ankle fractures, the most common of which include ankle fractures, Pilon fractures, talus fractures, calcaneal fractures, Lisfranc fracture-dislocations, metatarsal fractures, and navicular fractures. Among them, the incidence of ankle fractures accounts for about 3.9% of all fractures in the body, ranking first among intra-articular fractures; calcaneal fractures are the most common tarsal fractures in the ankle. After an ankle fracture, whether conservative treatment or surgical treatment is chosen, the patient usually needs to be immobilized and gradually get on the ground to bear weight after the fracture heals. This process usually takes 8-12 weeks, and the specific time depends on the location of the fracture.

[0004] Since the foot and ankle play a vital role in the body's weight bearing and stress buffering, prolonged bed rest or immobilization may lead to a series of complications, including joint adhesion, lower limb swelling, aspiration pneumonia, deep vein thrombosis, and urinary tract infection. Therefore, how to achieve early weight bearing of the foot and ankle during treatment has become a research hotspot in orthopedics, especially foot and ankle surgery.

[0005] However, the existing ankle braces generally provide mechanical support through a frame or an inflatable cavity to limit the movement of the ankle joint to reduce some of the load; but they still have the following shortcomings: 1. Lack of distraction function: Patients with ankle arthritis and ankle fractures are often accompanied by narrowing of the joint space, but the current braces are difficult to provide effective distraction function to reduce the pressure in the joint space. Continuous compression not only hinders cartilage repair, but may also aggravate inflammation and pain symptoms. 2. Lack of force line correction function: Ankle varus and valgus deformity is more common in ankle arthritis, but the existing brace design cannot correct the abnormal force line, so the problem of abnormal load stress in the joint has not been effectively solved. 3. Single function: The existing brace mainly reduces the load pressure through skin friction, but fails to combine auxiliary technologies such as magnetic therapy. 4. Insufficient comfort and adaptability: Existing walking braces usually generate friction through calf inflation to reduce the load on the ankle, but excessive inflation may cause post-traumatic soft tissue edema or swelling and pain around the wound after surgery. In addition, the foot and ankle morphology of different patients varies greatly, and existing braces are difficult to adjust accurately, affecting wearing comfort and treatment compliance.

[0006] In summary, whether for patients with ankle arthritis or ankle fractures, the existing braces have many deficiencies in force correction, distraction function, auxiliary treatment effect, and patient comfort. Therefore, it is urgent to develop a new brace with magnetic field distraction function to better meet the clinical needs of patients with ankle diseases. Summary of the invention

[0007] The present application proposes an ankle joint therapeutic walking brace based on magnetic field distraction to overcome the problems of insufficient distraction function, lack of force line correction function, poor comfort and therapeutic support effect of existing walking braces.

[0008] To achieve the above purpose, the technical solution proposed in this application is:

[0009] An ankle joint therapeutic walking brace based on magnetic field distraction, characterized in that it includes a calf fixing part, an ankle bearing part and a magnetic distraction mechanism;

[0010] The calf fixing part includes an external support frame and a flexible pad, wherein the flexible pad is arranged on the inner side of the external support frame, and the calf fixing part is fixed on the wearer's calf by a strap or a buckle device;

[0011] The ankle bearing part includes an external bearing frame and a flexible pad, wherein the external bearing frame is arranged around the ankle and the sole of the foot; the flexible pad is arranged on the inner side of the bearing frame, and the ankle bearing part is fixed to the foot and ankle of the wearer by a strap or a buckle device;

[0012] The magnetic retraction mechanism includes an inner magnetic field module and an outer magnetic field module, which are respectively arranged on the inner and outer sides of the walking brace, and correct the inversion and eversion of the ankle joint through the magnetic force difference between the inner and outer sides;

[0013] The medial magnetic field module and the lateral magnetic field module both include an upper magnetic field unit and a lower magnetic field unit, the upper magnetic field unit is fixedly connected to the calf fixing part, and the lower magnetic field unit is fixedly connected to the ankle bearing part; the magnetic field directions of the upper magnetic field unit and the lower magnetic field unit relatively generate a repulsive force to form a separation trend between the calf fixing part and the ankle bearing part, thereby exerting a distraction effect on the ankle joint.

[0014] Further, the magnetic retraction mechanism is a permanent magnetic structure, including a calf magnetic field bearing plate, an ankle magnetic field bearing plate, a magnet receiving assembly and a magnet unit;

[0015] The calf magnetic field bearing plate is fixedly connected to the calf fixing part, and the ankle magnetic field bearing plate is fixedly connected to the ankle bearing part; the calf magnetic field bearing plate and the ankle magnetic field bearing plate are kept aligned by a guide mechanism; the magnet receiving assembly is fixed on the calf magnetic field bearing plate and the ankle magnetic field bearing plate respectively;

[0016] The magnet containing assembly comprises a plurality of magnet clamping boxes arranged in parallel, a plurality of groups of magnet units are clamped in the magnet clamping box along the length direction of the magnet clamping box, and the magnetic field directions in the upper and lower adjacent magnet containing assemblies are arranged relatively.

[0017] Furthermore, the guide mechanism includes a guide column and a guide seat, the guide seat is arranged on both sides of the calf magnetic field bearing plate, and a guide hole is arranged on the guide seat; the guide column is correspondingly arranged at the upper ends of both sides of the ankle magnetic field bearing plate, one end of the guide column is connected to the ankle magnetic field bearing plate, and the other end passes through the guide hole of the guide seat, and the guide column can slide along the guide hole.

[0018] Furthermore, the guide mechanism includes a guide column, a guide seat and a rotation adjustment mechanism, the guide seat is arranged on both sides of the calf magnetic field bearing plate, and a guide hole is arranged on the guide seat; the rotation adjustment mechanism is arranged on both sides of the ankle magnetic field bearing plate, and the rotation adjustment mechanism includes an angle adjustment block and a rotation adjustment shaft, the rotation adjustment shaft is passed through the angle adjustment block and fixedly connected to the ankle magnetic field bearing plate, and the angle adjustment block rotates relative to the ankle magnetic field bearing plate through the rotation adjustment shaft; the guide column is fixedly arranged at the upper end of the angle adjustment block, and the guide column passes through the guide hole of the guide seat and slides axially in the guide hole.

[0019] Furthermore, a buffer spring is sleeved on the outside of the guide column, the lower end of the buffer spring is fixedly connected to the guide column, and the upper end is in contact with the guide seat.

[0020] Furthermore, the magnet box is a longitudinally elongated shell structure, with limit clamping plates on both sides thereof, the limit clamping plates are arranged along the length direction of the magnet box, and the limit clamping plates are flipped and extended along the inner side to form a hook-shaped structure; the top and bottom of the magnet box are respectively provided with a long limit plate and a short limit plate; a accommodating cavity is formed between the limit clamping plate, the long limit plate and the short limit plate, and the accommodating cavity matches the shape of the magnet unit.

[0021] Furthermore, five magnet clamp boxes are arranged in parallel on a single magnet containing assembly; the magnet unit is a long strip of permanent magnet, the material of the permanent magnet is neodymium iron boron, and the magnetic field strength of a single magnet unit is not less than 5000 gauss.

[0022] Furthermore, a detachable limiting boss is provided at the top end of the guide column.

[0023] Furthermore, the calf magnetic field bearing plate is a longitudinal plate-shaped structure, the calf magnetic field bearing plate is fixedly connected to the flexible pad, a plurality of parallel rectangular through grooves are provided on the calf magnetic field bearing plate, and straps are arranged in the rectangular through grooves.

[0024] Furthermore, the magnetic retraction mechanism is an electromagnetic structure, including an electromagnetic coil assembly on a calf magnetic field bearing plate and an ankle magnetic field bearing plate;

[0025] The calf magnetic field bearing plate and the ankle magnetic field bearing plate are respectively provided with electromagnetic coil mounting seats, and the electromagnetic coil assembly is fixed on the mounting seats;

[0026] The electromagnetic coil assembly includes a plurality of independently arranged electromagnetic coil units, which are arranged along the length direction of the calf magnetic field bearing plate and the ankle magnetic field bearing plate, and the electromagnetic coil units at upper and lower positions are directly opposite;

[0027] The electromagnetic coil unit is connected to the power module through the adjustment module. The adjustment module and the power module are arranged outside the walking brace. The adjustment module adjusts the current intensity and current direction of the electromagnetic coil unit.

[0028] Compared with the prior art, the beneficial effects of this application are:

[0029] The ankle joint therapeutic walking brace based on magnetic field distraction proposed in the present application realizes the distraction effect on the ankle joint through a magnetic distraction mechanism, and utilizes the magnetic field repulsion between the upper magnetic field unit and the lower magnetic field unit to effectively relieve joint pressure, which can distract the ankle joint gap by 3.0-5.0 mm, greatly reduce the pressure concentration area of ​​the articular cartilage, thereby alleviating inflammation and pain, and promoting joint function recovery; at the same time, the medial magnetic field module and the lateral magnetic field module work together to produce an asymmetric magnetic field repulsion difference, effectively correcting the inversion and eversion force lines of the ankle joint; through the dynamic adjustment of the magnetic field module, the brace has an adjustable inversion and eversion correction angle range of 0-15 degrees; it can greatly reduce the local stress of the ankle joint, foot and ankle traumatic fractures and postoperative foot and ankle, and facilitate the patient to walk with weight at an early stage; the magnet containing component of the present application adopts a modular design, combined with the application of high-strength neodymium iron boron permanent magnets, which not only improves the stability of the magnetic field effect, but also enhances the adjustability of the traction force.

[0030] The magnet housing assembly of the present application adopts a modular design, and by arranging multiple groups of high-strength NdFeB permanent magnets in an embedded manner, the stability of the magnetic field effect is significantly improved, while the adjustability of the traction force is enhanced. Not only that, the magnetic field can also have a positive therapeutic effect on the tissues around the ankle joint; by improving local blood circulation, the magnetic field can accelerate the absorption and dissipation of inflammatory exudates, while reducing the concentration of pain-causing substances, further reducing swelling and pain, and providing significant symptom improvement for patients with ankle arthritis.

[0031] Of course, the implementation of the various technical solutions of the present application does not necessarily require achieving all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a walking brace according to Embodiment 1 of the present application;

[0033] Figure 2 It is a front end schematic diagram of the walking brace of Example 1 of the present application;

[0034] Figure 3 is a side schematic diagram of the walking brace of Example 1 of the present application;

[0035] Figure 4 It is a schematic diagram of the structure of the calf fixing part and the upper magnetic field unit of Example 1 of the present application;

[0036] Figure 5 It is a structural schematic diagram of the ankle bearing part and the lower magnetic field unit of Example 1 of the present application;

[0037] Figure 6 It is a schematic diagram of the assembly of the upper magnetic field unit and the lower magnetic field unit of Example 1 of the present application;

[0038] Figure 7 yes Figure 6 A partial enlarged schematic diagram of

[0039] Figure 8 It is a schematic diagram of the structure of the magnet cartridge of Example 1 of the present application.

[0040] In the figure,

[0041] 1-calf fixing part, 101-calf flexible pad, 102-binding strap;

[0042] 2- ankle bearing part, 201- external bearing frame, 202- ankle flexible pad;

[0043] 3-magnetic retraction mechanism, 301-inner magnetic field module, 302-outer magnetic field module, 303-upper magnetic field unit, 304-lower magnetic field unit, 305-calf magnetic field bearing plate, 306-magnet containing assembly, 307-magnet clamping box, 308-magnet unit, 309-limit clamping card plate, 310-long limit plate, 311-short limit plate, 312-ankle magnetic field bearing plate, 313-guide column, 314-guide seat, 315-angle adjustment block, 316-rotation adjustment shaft, 317-buffer spring, 318-limiting boss. DETAILED DESCRIPTION

[0044] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0045] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0046] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0047] Embodiment 1:

[0048] The present embodiment provides an ankle joint therapeutic walking brace based on magnetic field traction, which is designed with a permanent magnetic structure to traction the ankle joint to relieve joint pressure and correct abnormal ankle inversion or eversion force lines; the brace mainly includes a calf fixing part 1, an ankle bearing part 2 and a magnetic traction mechanism 3.

[0049] The calf fixing part 1 is composed of an external support frame and a calf flexible pad 101. The calf flexible pad 101 is arranged on the inner side of the external support frame and fits closely with the surface of the patient's calf. In order to ensure the effective transmission of the traction force, the calf flexible pad 101 needs to fully consider the friction with the calf surface, otherwise when the magnetic traction mechanism applies the traction effect, the calf fixing part may slide with the traction force, affecting the traction effect. For this reason, the calf flexible pad 101 preferably adopts a material with both high friction and air permeability. For example, in this embodiment, a high-density woven fabric and a polyurethane (PU) material with good air permeability are used. These materials not only have sufficient friction, but also maintain good ventilation of the wearing part to avoid the feeling of stuffiness caused by long-term wearing. In addition, micro textures or anti-slip particles are added to the inner surface of the calf flexible pad 101 to enhance the friction when in contact with the skin. In this embodiment, the calf flexible pad 101 is optimized and designed according to the calf anatomical morphology to ensure that it fits perfectly with the calf surface and avoids sliding due to local gaps; in this embodiment, the calf fixing part 1 is fixed to the patient's calf by two straps 102, and the width of a single strap 102 is preferably 50-80 mm to ensure uniform pressure distribution and avoid the influence of local compression on blood circulation, while providing sufficient fixing force to ensure the stability of the brace; the strap 102 adopts a Velcro structure, which is easy to adjust the tightness and quickly fix. Of course, in other embodiments, other designs can be selected for the fixing method of the strap, such as using a buckle device or an elastic fixing belt: the buckle device can provide a stronger fixing force, which is suitable for patients who need higher stability; the elastic fixing belt can dynamically adjust the pressure distribution according to the patient's movement state, and better fit the shape of the leg.

[0050] The ankle bearing part 2 includes an external bearing frame 201 and a flexible ankle pad 202. The external bearing frame 201 surrounds the sole and ankle to provide necessary support for the foot and ankle, thereby enhancing the overall stability of the brace. The material of the external bearing frame 201 is preferably a high-strength lightweight material, such as a carbon fiber composite material or a high-performance engineering plastic. The flexible ankle pad 202 is arranged on the inner side of the external bearing frame 201. Its main function is to improve the fit of the foot and ensure that the brace remains stable during the patient's exercise, while avoiding discomfort caused by long-term wearing. Similarly, in this embodiment, the material of the flexible ankle pad 202 is a high-density woven material. The flexible pad 202 of the ankle is made of cloth and polyurethane (PU) material with good air permeability, and the thickness of the flexible pad 202 is 3-5 mm, which can provide appropriate cushioning protection without excessively increasing the volume and weight of the brace; in addition, to further improve the comfort, the surface of the flexible pad 202 of the ankle can be designed as a structure with air holes to improve air permeability and reduce the stuffiness when worn for a long time; for areas prone to friction, such as the heel and ankle joints, fine particles can be added to the surface of the flexible pad to enhance the friction with the skin or socks, thereby preventing the brace from sliding during exercise; similar to the calf fixing part 1, the ankle bearing part 2 is fixed to the foot by two straps 102.

[0051] The magnetic traction mechanism 3 includes an inner magnetic field module 301 and an outer magnetic field module 302, which are arranged on the inner and outer sides of the brace respectively, and the inversion or eversion force line of the ankle joint is corrected by the magnetic force difference between the inner magnetic field module 301 and the outer magnetic field module 302; the inner magnetic field module 301 and the outer magnetic field module 302 both include an upper magnetic field unit 303 and a lower magnetic field unit 304; wherein, the upper magnetic field unit 303 is fixedly connected to the calf fixing part 1, and the lower magnetic field unit 304 is fixedly connected to the ankle bearing part 2; the magnetic field directions of the upper magnetic field unit 303 and the lower magnetic field unit 304 are relatively arranged, and the repulsive force between the magnetic fields is used to form a separation trend, thereby generating a traction effect between the calf fixing part and the ankle bearing part, effectively reducing the pressure on the ankle joint.

[0052] The upper magnetic field unit 303 includes a calf magnetic field bearing plate 305, a magnet receiving assembly 306 and a magnet unit 307; the calf magnetic field bearing plate 305 is fixedly connected to the external support frame of the calf fixing part, and the calf magnetic field bearing plate 305 is a longitudinal plate structure, made of high-strength lightweight materials, such as carbon fiber composite materials or aviation-grade aluminum alloys, which ensures its structural strength while reducing the overall weight of the brace; the calf magnetic field bearing plate 305 is fixedly connected to the calf flexible pad 101 through the external support frame, and a plurality of parallel rectangular through grooves are provided on the calf magnetic field bearing plate 305, through which the straps 102 are passed; the magnet receiving assembly 306 is arranged It is installed on the calf magnetic field bearing plate 305 to stabilize and fix the magnet containing assembly 306; the magnet containing assembly 306 is a modular structure, each magnet containing assembly 306 includes five magnet clamp boxes 307 arranged in parallel, each magnet clamp box 307 is 100-150 mm long and 20-30 mm wide, the magnet clamp box 307 is made of high-strength engineering plastic, and a magnet unit 308 is installed in the magnet clamp box 307. The magnet unit 308 is made of neodymium iron boron permanent magnet material, and the magnetic field strength of a single magnet unit 308 is not less than 5000 gauss (0.5 Tesla), which can provide a stable and strong magnetic field to meet the traction requirements brought by the repulsive force of the upper and lower parts.

[0053] A single magnet box 307 is a structure similar to a spring chain buckle, with an overall longitudinally long strip shell structure made of high-strength engineering plastic; limited clamping plates 309 are arranged on both sides of the magnet box 307, and the clamping plates 309 are arranged along the length direction of the magnet box, and the ends thereof are turned inward and extended to form a hook-shaped structure; the hook-shaped structure provides a clamping force for the magnet unit 308 through an elastic design, thereby preventing the magnet unit 308 from sliding or falling off in the magnet box 307, and facilitating the rapid assembly and disassembly of the magnet unit 308.

[0054] For the upper magnetic field unit 303, a long limit plate 310 and a short limit plate 311 are respectively provided at the top and bottom of the magnet clamping box 307; the long limit plate 310 is arranged at the top of the magnet unit 308, and works together with the limit clamping card plate 309 to prevent the magnet unit 308 from detaching from the top due to the magnetic field repulsion, thereby ensuring that the magnet unit 308 remains stable under the action of a high-intensity magnetic field; the short limit plate 311 is arranged at the bottom of the magnet unit 308, so as to facilitate the magnet unit 308 to smoothly enter the magnet clamping box 307 during installation or replacement, and provide appropriate supporting force.

[0055] Corresponding to the upper magnetic field unit 303, the lower magnetic field unit 304 includes a foot and ankle magnetic field bearing plate 312, a magnet receiving assembly 306 and a magnet unit 308; the foot and ankle magnetic field bearing plate 312 is fixedly connected to the foot and ankle bearing part 2, and the magnet receiving assembly 306 is installed on the foot and ankle magnetic field bearing plate 312. Its structure, modular design and the number of magnet clip boxes 307 included are the same as those of the upper magnetic field unit 303, and will not be repeated. The magnet clip box 307 is installed inside the magnet unit 308, and the retraction effect is achieved through the magnetic field repulsion between the upper and lower magnetic field units.

[0056] For the lower magnetic field unit 304, a short limit plate 311 and a long limit plate 310 are respectively provided at the top and bottom of the magnet clamping box 307, which is opposite to the arrangement of the upper magnetic field unit 303 and is used to prevent the magnet unit 308 from detaching from the bottom due to the magnetic field repulsion. The short limit plate 311 is arranged at the top to facilitate the installation of the magnet unit 308.

[0057] In order to solve the problem of centering the upper magnetic field unit 303 and the lower magnetic field unit 304 and correct the abnormal force line of ankle inversion or eversion, a guide mechanism is provided between the upper magnetic field unit 303 and the lower magnetic field unit 304 in this embodiment; the guide mechanism includes a guide column 313, a guide seat 314 and a rotation adjustment mechanism. The guide seat 314 is arranged on both sides of the lower end of the calf magnetic field bearing plate 305, and a guide hole is provided on the guide seat 314 to limit the movement trajectory of the guide column. The guide column 313 passes through the guide hole of the guide seat 314 and can slide freely in the axial direction in the guide hole, thereby ensuring that the upper and lower magnetic field units remain accurately aligned during the distraction process.

[0058] In order to correct the abnormal force line of ankle inversion or eversion, the guide mechanism also includes a rotation adjustment mechanism, which is arranged on both sides of the ankle magnetic field bearing plate 312; the rotation adjustment mechanism includes an angle adjustment block 315 and a rotation adjustment shaft 316, and the rotation adjustment shaft 316 is passed through the angle adjustment block 315 and fixedly connected to the ankle magnetic field bearing plate 312; through the rotation adjustment shaft 316, the angle adjustment block 315 can rotate relative to the ankle magnetic field bearing plate 312, thereby adjusting the angle of the guide column 313.

[0059] For the correction of ankle valgus and valgus abnormality, this embodiment makes differential adjustments through the configuration of the magnet units 308 of the medial magnetic field module 301 and the lateral magnetic field module 302 to meet the correction needs; taking the common correction of valgus abnormality as an example, the characteristic of valgus abnormality is that the ankle joint tilts inward, causing the medial side of the joint to bear too much pressure. To this end, the number of magnet units 308 is appropriately increased in the medial magnetic field module 301, for example, 5 pairs of magnet units 308 are set to increase the magnetic field repulsion on the inside, and at the same time, 3 pairs of magnet units 308 are set in the lateral magnetic field module 302 to reduce the magnetic field repulsion on the outside, combined with the angle adjustment function of the rotation adjustment mechanism, to dynamically optimize the action position and correction direction of the internal and external magnetic field modules, thereby correcting the valgus of the ankle joint.

[0060] This differentiated configuration enables the medial and lateral magnetic field modules to form an asymmetric magnetic field repulsion when correcting the ankle joint force line. Through the combination of the distraction effect of the magnetic field repulsion and the force line adjustment, it can effectively relieve excessive pressure on the medial side of the joint and provide targeted correction support force line on the lateral side.

[0061] In addition, in order to improve the comfort of patients during wearing, a buffer spring 317 is provided on the outer sleeve of the guide column 313 in this embodiment; the buffer spring 317 has a stiffness of 10-15N / mm, the lower end is fixedly connected to the guide column 313, and the upper end is in contact with the guide seat 314; the buffer spring 317 can effectively absorb and buffer the impact force when the patient walks or exercises, thereby reducing the load on the ankle joint and other parts of the brace, and significantly improving the wearing experience.

[0062] A removable limiting boss 318 is provided at the top of the guide column 313; the limiting boss 318 limits the excessive sliding and disengagement of the guide column in the guide hole; when putting on and taking off the brace or replacing parts in daily life, the user only needs to remove the limiting boss 318 at the upper end of the guide column 313 to separate the calf fixing part 1 from the ankle bearing part 2.

[0063] In this embodiment, the separation tendency generated by the magnetic field repulsion effectively achieves the expansion of the ankle joint gap. Preliminary tests show that this design can increase the ankle joint gap by 3.0-5.0 mm under traction; this expansion effect significantly reduces the pressure concentration area of ​​the articular cartilage, thereby alleviating excessive wear of the cartilage and effectively slowing down the process of joint degeneration; the moderate expansion of the ankle joint gap also improves the microcirculation in the joint cavity, promotes the absorption of inflammatory exudates, reduces the swelling and pain symptoms caused by abnormal joint pressure, and provides patients with a more significant symptom improvement effect.

[0064] Based on the magnetic field strength of each magnet unit being 5000 Gauss (0.5 Tesla), the repulsion of a single pair of magnet units is calculated using the magnetic field repulsion formula. The specific process is as follows: the initial distance between the upper and lower magnet units is set to 10 mm (0.01 m), and the effective area of ​​a single magnet is 1 cm2 (1×10 -4 square meters), when the magnet units are arranged along the length direction and face each other, the repulsive force F generated by the magnetic field can be calculated by the following formula:

[0065]

[0066] in:

[0067] B is the magnetic field strength of a single pair of magnet units (unit: Tesla);

[0068] A is the effective cross-sectional area of ​​the magnet (unit: square meters);

[0069] μ0 is the vacuum magnetic permeability, which is 4π×10 -7 H / m.

[0070] Substituting into the formula, we get F≈9.95N, that is, the repulsive force of a single pair of magnet units is about 9.95 Newtons; then, the total repulsive force of the five pairs of magnet units is F total =49.75N, 49.75N is approximately equal to 5KG of gravity. This force is very significant in distracting the ankle joint gap and can effectively achieve 3.0-5.0mm of joint gap distraction.

[0071] In addition, by setting the difference between the internal and external magnetic forces, the adjustable inward and outward angle range of the rotation adjustment mechanism is 0-15 degrees, thereby meeting more complex ankle joint force correction needs.

[0072] Through the above design, this embodiment not only achieves the gap distraction and force line correction of the ankle joint, but also significantly improves the wearing comfort and targeted treatment, providing an effective solution for patients with ankle arthritis with incorrect hindfoot force line.

[0073] It should be noted that in other embodiments, in order to simplify the design or reduce the cost, the rotation adjustment mechanism may not be provided. In this case, the brace can still achieve basic ankle traction and meet the treatment needs of some patients.

[0074] In recent years, magnetic medical technology has developed rapidly, including magnetic anastomosis, magnetic anchoring, magnetic navigation, magnetic levitation, magnetic tracing and magnetic drive. Among them, magnetic levitation technology uses magnetic field repulsion to reduce joint pressure and shows significant application potential in the field of orthopedics. Studies have shown that the magnetic field can be used to support the joint gap, which can not only reduce the burden on articular cartilage, but also improve the microenvironment in the joint and have a positive effect on the pathological process of osteoarthritis [Zhang Lining, Guo Yanmei, Wang Xinglin. Observation on the efficacy of low-frequency combined pulse magnetic therapy in the treatment of knee osteoarthritis [J]. Journal of Shanxi Medical University, 2010, 41(6): 539-542].

[0075] Based on the above theory, the magnetic field-based ankle joint therapeutic walking brace in this embodiment adopts a magnetic force retraction mechanism, including a medial magnetic field module and a lateral magnetic field module, and uses the magnetic field repulsion of the upper and lower magnetic field units to exert a retraction effect on the ankle joint, relieve joint pressure and correct the inversion or eversion force line of the ankle joint. The magnetic field strength is provided by a neodymium iron boron permanent magnet, and the magnetic field strength of each magnet unit is not less than 5000 gauss. Preliminary tests show that this design can effectively open the ankle joint gap by 0.5-1.0 mm and reduce the compression area of ​​the articular cartilage.

[0076] In addition, the magnetic field also has a significant improvement effect on the soft tissue and inflammatory exudates around the ankle joint. Studies have shown that the magnetic field can significantly promote local blood circulation, accelerate the absorption and dissipation of inflammatory exudates, and reduce the concentration of pain-causing substances such as potassium ions, histamine, bradykinin, etc., thereby reducing swelling and pain [Xiang Wei, Yang Jiao, Yan Xuhong, et al. Research Progress in Physical Therapy for Knee Osteoarthritis [J]. Hunan Journal of Traditional Chinese Medicine, 2018, 34 (12): 170-172]. Through this mechanism, the magnetic traction mechanism of this embodiment not only achieves force line correction, but also has an auxiliary therapeutic effect on the pathological symptoms of ankle arthritis.

[0077] The ankle joint therapeutic walking brace based on magnetic field traction of this embodiment introduces a magnetic traction mechanism to combine magnetic field repulsion and force line correction, thereby providing a new solution for the treatment of ankle arthritis. Preliminary clinical trial results show that the walking brace of this embodiment significantly improves the patient's walking stability and pain relief, and no obvious discomfort occurs.

[0078] Embodiment 2:

[0079] The present embodiment provides an ankle joint therapeutic walking brace based on magnetic field traction. Similar to the first embodiment, the brace mainly comprises a calf fixing portion, an ankle bearing portion and a magnetic traction mechanism. The structures of the calf fixing portion and the ankle bearing portion are the same as those in the first embodiment and will not be described in detail herein.

[0080] Different from Example 1, the magnetic retraction mechanism of this embodiment is an electromagnetic structure, including an electromagnetic coil assembly arranged on the calf magnetic field bearing plate and the ankle magnetic field bearing plate; the calf magnetic field bearing plate and the ankle magnetic field bearing plate are respectively provided with an electromagnetic coil mounting seat, and the electromagnetic coil mounting seat is used to fix the electromagnetic coil assembly to ensure the position stability and direction alignment of the electromagnetic coil units of the calf fixing part and the ankle bearing part; the electromagnetic coil assembly is composed of a plurality of independently arranged electromagnetic coil units, which are arranged along the length direction of the calf magnetic field bearing plate and the ankle magnetic field bearing plate, and the electromagnetic coil units in the upper and lower positions are arranged opposite each other.

[0081] To achieve dynamic correction and traction functions, the electromagnetic coil unit is connected to the power module through the adjustment module; the adjustment module and the power module are arranged on the outside of the walking brace to facilitate the patient to operate and adjust; the adjustment module can control the power intensity and current direction of the electromagnetic coil unit to change the size and direction of the magnetic field, thereby achieving precise adjustment of the magnetic field repulsion force to meet the needs of correction of different degrees of ankle inversion or eversion abnormalities.

[0082] In specific applications, the electromagnetic coil unit forms a separation trend between the calf magnetic field bearing plate and the ankle magnetic field bearing plate through electromagnetic repulsion, which can achieve a gap traction effect while correcting the ankle joint force line; the adjustment module can dynamically adjust the magnetic force difference between the internal and external magnetic fields of the ankle according to the patient's condition needs, thereby more effectively correcting the abnormal force line of the ankle joint.

[0083] Since the electromagnetic structure can provide a stronger magnetic retraction effect, this embodiment is particularly suitable for continuous retraction treatment at night; through the precise control of the adjustment module, the brace can provide stable and strong traction when the patient is at rest at night, which can not only stably retract the ankle joint gap and reduce the pressure on the tibiotalar joint surface cartilage, but also effectively improve the microcirculation environment in the joint and promote the absorption and dissipation of inflammatory exudates. At the same time, the continuous effect of the magnetic field can also reduce inflammatory factors, thereby reducing common pain and discomfort at night, providing patients with a more comfortable treatment experience.

[0084] Compared with Example 1, the beneficial effect of this embodiment is that a controllable magnetic field repulsion is provided through the electromagnetic coil assembly. Compared with the permanent magnet structure in Example 1, this embodiment can flexibly adjust the magnetic field strength, provide greater repulsion, and flexibly adjust the magnetic force difference to meet the patients' needs for stepped correction of ankle arthritis with different degrees of severity.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. An ankle joint therapeutic walking brace based on magnetic field distraction, characterized in that: It includes a calf fixing part, an ankle bearing part and a magnetic retraction mechanism; The calf fixing part includes an external support frame and a flexible pad, wherein the flexible pad is arranged on the inner side of the external support frame, and the calf fixing part is fixed on the wearer's calf by a strap or a buckle device; The ankle bearing part includes an external bearing frame and a flexible pad, wherein the external bearing frame is arranged around the ankle and the sole of the foot; the flexible pad is arranged on the inner side of the bearing frame, and the ankle bearing part is fixed to the foot and ankle of the wearer by a strap or a buckle device; The magnetic retraction mechanism includes an inner magnetic field module and an outer magnetic field module, which are respectively arranged on the inner and outer sides of the walking brace, and correct the inversion and eversion of the ankle joint through the magnetic force difference between the inner and outer sides; The medial magnetic field module and the lateral magnetic field module both include an upper magnetic field unit and a lower magnetic field unit, the upper magnetic field unit is fixedly connected to the calf fixing part, and the lower magnetic field unit is fixedly connected to the ankle bearing part; the magnetic field directions of the upper magnetic field unit and the lower magnetic field unit relatively generate a repulsive force to form a separation trend between the calf fixing part and the ankle bearing part, thereby exerting a distraction effect on the ankle joint.

2. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 1, characterized in that: The magnetic retraction mechanism is a permanent magnetic structure, including a calf magnetic field bearing plate, an ankle magnetic field bearing plate, a magnet receiving assembly and a magnet unit; The calf magnetic field bearing plate is fixedly connected to the calf fixing part, and the ankle magnetic field bearing plate is fixedly connected to the ankle bearing part; the calf magnetic field bearing plate and the ankle magnetic field bearing plate are kept aligned by a guide mechanism; the magnet receiving assembly is fixed on the calf magnetic field bearing plate and the ankle magnetic field bearing plate respectively; The magnet containing assembly comprises a plurality of magnet clamping boxes arranged in parallel, a plurality of groups of magnet units are clamped in the magnet clamping box along the length direction of the magnet clamping box, and the magnetic field directions in the upper and lower adjacent magnet containing assemblies are arranged relatively.

3. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 2, characterized in that: The guide mechanism includes a guide column and a guide seat, wherein the guide seat is arranged on both sides of the calf magnetic field bearing plate, and a guide hole is arranged on the guide seat; the guide column is correspondingly arranged at the upper ends of both sides of the ankle magnetic field bearing plate, one end of the guide column is connected to the ankle magnetic field bearing plate, and the other end passes through the guide hole of the guide seat, and the guide column can slide along the guide hole.

4. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 2, characterized in that: The guide mechanism includes a guide column, a guide seat and a rotation adjustment mechanism. The guide seat is arranged on both sides of the calf magnetic field bearing plate, and a guide hole is arranged on the guide seat; the rotation adjustment mechanism is arranged on both sides of the ankle magnetic field bearing plate, and the rotation adjustment mechanism includes an angle adjustment block and a rotation adjustment shaft. The rotation adjustment shaft is passed through the angle adjustment block and fixedly connected to the ankle magnetic field bearing plate, and the angle adjustment block rotates relative to the ankle magnetic field bearing plate through the rotation adjustment shaft; the guide column is fixedly arranged at the upper end of the angle adjustment block, and the guide column passes through the guide hole of the guide seat and slides axially in the guide hole.

5. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 3 or 4, characterized in that: A buffer spring is sleeved on the outside of the guide column, the lower end of the buffer spring is fixedly connected to the guide column, and the upper end of the buffer spring is in contact with the guide seat.

6. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 2, characterized in that: The magnet clamp box is in the form of a longitudinally long strip shell structure, with limit clamping plates on both sides thereof, the limit clamping plates are arranged along the length direction of the magnet clamp box, and the limit clamping plates are flipped and extended along the inner side to form a hook-shaped structure; a long limit plate and a short limit plate are respectively provided on the top and bottom of the magnet clamp box; a receiving cavity is formed between the limit clamping plates, the long limit plate and the short limit plate, and the receiving cavity matches the shape of the magnet unit.

7. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 2, characterized in that: Five magnet clamp boxes are arranged in parallel on a single magnet containing assembly; the magnet unit is a long strip permanent magnet, the material of the permanent magnet is neodymium iron boron, and the magnetic field strength of a single magnet unit is not less than 5000 gauss.

8. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 4, characterized in that: The top end of the guide column is provided with a detachable limiting boss.

9. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 4, characterized in that: The calf magnetic field bearing plate is a longitudinal plate-shaped structure, the calf magnetic field bearing plate is fixedly connected to the flexible pad, a plurality of parallel rectangular through slots are provided on the calf magnetic field bearing plate, and straps are arranged in the rectangular through slots.

10. The ankle joint therapeutic walking brace based on magnetic field distraction according to claim 1, characterized in that: The magnetic retraction mechanism is an electromagnetic structure, including an electromagnetic coil assembly on a calf magnetic field bearing plate and an ankle magnetic field bearing plate; The calf magnetic field bearing plate and the ankle magnetic field bearing plate are respectively provided with electromagnetic coil mounting seats, and the electromagnetic coil assembly is fixed on the mounting seats; The electromagnetic coil assembly includes a plurality of independently arranged electromagnetic coil units, which are arranged along the length direction of the calf magnetic field bearing plate and the ankle magnetic field bearing plate, and the electromagnetic coil units at upper and lower positions are directly opposite; The electromagnetic coil unit is connected to the power module through the adjustment module. The adjustment module and the power module are arranged outside the walking brace. The adjustment module adjusts the current intensity and current direction of the electromagnetic coil unit.

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