A knee guard and a control method thereof

Abstract

The application relates to the technical field of medical equipment, and discloses a knee protector and a control method thereof. The knee protector comprises a fabric base, a metal circuit, an elastic support and a plurality of electrodes. The fabric base has a first surface and a second surface, and a flexible base material is embedded in the fabric aperture of the first surface. The metal circuit is formed on the first surface. Two elastic supports are oppositely arranged along a first direction and extend along a second direction. A clamping position for accommodating a patella is formed between the two elastic supports. The plurality of electrodes are arranged on the fabric base and electrically connected with the metal circuit. When the knee protector is in a wearing state, the electrodes surround the clamping position. The knee protector can position the patella through the elastic supports. When a user wears the knee protector, the position of the elastic supports can be quickly adjusted, the electrodes arranged around the clamping position can be accurately aligned with preset stimulation positions around the patella, the probability of electrode deviation from the preset positions is reduced, and the electric stimulation treatment effect of the knee protector is ensured.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a knee brace and its control method. Background Technology

[0002] Transcutaneous electrical nerve stimulation (TENS) is a non-invasive electrical stimulation technique that delivers specific low-frequency pulsed currents through the skin to the body, which are then transmitted to neurotransmitters to relieve pain and provide treatment. Developed since the 1970s, TENS technology has been widely used in rehabilitation medicine. Current techniques involve placing electrodes on the knee brace to generate low-frequency pulsed currents, thus relieving knee pain.

[0003] However, since the knee brace covers the entire knee and the electrodes are set on the knee brace, the electrodes must be fixed around the patella when the knee brace is in use. However, when actually using the knee brace, patients may easily cause the electrodes to deviate from the preset position due to improper operation, which will affect the actual use effect. Summary of the Invention

[0004] This application discloses a knee brace that uses elastic supports to position the patella. When worn, the user can quickly adjust the knee brace according to the position of the elastic supports, ensuring that the electrodes positioned around the clamping area are accurately aligned with preset stimulation points around the patella. This reduces the probability of electrodes deviating from their preset positions and ensures the effectiveness of the electrical stimulation therapy. Simultaneously, the two elastic supports also provide support to both sides of the knee, enhancing the knee brace's auxiliary support and protection effect.

[0005] To achieve the above objectives, this application discloses a knee brace, comprising: a fabric substrate having a first surface and a second surface, the first surface being used to wrap the knee, and a flexible substrate being embedded in the fabric pores of the first surface; Metallic lines are formed on the first surface; Two elastic support members are disposed on the second surface of the fabric base. The two elastic support members are disposed opposite to each other along a first direction and extend along a second direction. A clamping position for accommodating the patella is formed between the two elastic support members. The second direction is configured to be parallel to the extension direction of the leg when the knee brace is in the wearing state. Multiple electrodes are disposed on the fabric substrate and electrically connected to the metal circuitry. When the knee brace is in the wearing state, the electrodes surround the clamping position and are used to generate a stimulating current.

[0006] Thus, the elastic support components can be elastic strips or plates made of silicone or rubber-like elastic materials. They possess a certain degree of support rigidity while also being able to adapt to deformation without excessively restricting leg movement. Two elastic support components extend parallel to the direction of leg extension, leaving a clamping space in the middle to accommodate the patella. When wearing the brace, the user simply aligns the patella with the gap between the two elastic support components for quick and easy placement, eliminating the need for repeated adjustments and reducing the probability of electrode misalignment when ordinary users wear it themselves. Simultaneously, the elastic support components apply appropriate support to the collateral ligaments on both sides of the knee, helping to stabilize the knee joint, reducing abnormal knee swaying during exercise, and further enhancing the protective effect of the knee brace. The knee brace may also include multiple electrodes. When the knee brace is worn, these electrodes surround the clamping position, directly encircling the patella. This allows for simultaneous electrical stimulation of multiple stimulation points, such as the quadriceps tendon, patellar ligament, upper point of the medial collateral ligament, and lower point of the medial collateral ligament, covering multiple key treatment locations around the patella. This ensures the therapeutic effect of electrical stimulation on knee joint strain recovery. Combined with the positioning structure of the elastic support, each electrode can be stably aligned with the preset treatment position, avoiding the problem of loss of therapeutic effect due to displacement of a single electrode, further ensuring the stability of electrical stimulation treatment.

[0007] As an optional implementation, the fabric substrate has a first edge and a second edge opposite to each other along the first direction, and a third edge and a fourth edge opposite to each other along the second direction; The plurality of electrodes includes a first electrode, a second electrode, a third electrode, and a fourth electrode. The first electrode and the second electrode are disposed near the first edge, the third electrode and the fourth electrode are disposed near the second edge, and the second electrode is disposed near the corner between the fourth edge and the first edge. Along the second direction, the first electrode and the second electrode are staggered, and the first electrode is closer to the second edge than the second electrode. The third electrode is disposed near the corner between the third edge and the second edge. Along the second direction, the fourth electrode and the third electrode are staggered, and the fourth electrode is closer to the first edge than the third electrode. When the knee brace is in the wearing state, the second electrode and the fourth electrode are respectively located on both sides of the clamping position along the leg extension direction, and the first electrode and the third electrode are respectively located on both sides of the clamping position along the first direction.

[0008] In this way, the four electrodes correspond to four different treatment points around the patella. The first and third electrodes correspond to the key stimulation points of the medial and lateral collateral ligaments of the knee joint, respectively. The second and fourth electrodes correspond to the quadriceps tendon and patellar ligament, respectively. They are distributed around the clamping position that accommodates the patella, which can cover the core stimulation area required for knee joint injury recovery and ensure the coverage of electrical stimulation treatment. At the same time, the staggered arrangement can avoid the patella position, avoid the electrodes directly compressing the patella and causing discomfort, and also allow each electrode to be stably attached to the corresponding muscle and ligament position, ensuring the transmission effect of electrical stimulation.

[0009] As an optional implementation, the second surface of the fabric substrate is provided with a hook and loop side, the corner between the first edge and the third edge is provided with a first hook and loop side, and the corner between the second edge and the fourth edge is provided with a second hook and loop side.

[0010] In this way, after wrapping the fabric base around the knee area when wearing it, the first and second hook sides can be glued to the hook side of the second surface. By adjusting the glued position, the tightness of the knee brace can be flexibly adjusted to fit different leg sizes. At the same time, the hook and loop fastener connection method is easy to install and remove, and users can quickly complete the wearing and removal, making the operation more convenient.

[0011] As an optional implementation, both the first edge and the second edge have recesses, and the second surface of the fabric substrate is provided with two protective pads, which are respectively located at the edges of the two recesses.

[0012] In this way, the recessed part can avoid the popliteal fossa area, so it will not put pressure on the back of the popliteal fossa after wearing, and will avoid squeezing the blood vessels and nerves in the popliteal fossa after wearing for a long time, thus improving the wearing comfort. The protective pad set at the edge of the recessed part can reinforce the edge of the fabric, preventing the edge from curling, wearing and fraying after long-term use, thus extending the service life of the fabric base. At the same time, the protective pad can also increase the softness of the edge, preventing the hard edge from rubbing against the skin and causing discomfort.

[0013] As an optional implementation, the electrode is a flexible electrode, the electrode is circular, and the diameter d satisfies: 50mm≤d≤70mm.

[0014] In this way, the circular flexible electrodes can fit evenly against the skin without sharp edges, so as not to cause discomfort or pressure on the skin. By controlling the diameter between 50mm and 70mm, sufficient conductive contact area can be ensured to reduce the contact resistance of the stimulation current and ensure the transmission efficiency of electrical stimulation. At the same time, the electrode area will not take up too much space due to excessive size, avoiding mutual interference between adjacent electrodes. It can also avoid the patella position and adapt to the knee joint size of most adults, ensuring that all four electrodes can be accurately aligned with the corresponding stimulation points.

[0015] As an optional implementation, the second surface of the fabric substrate is provided with a support mounting portion, and the elastic support is detachably inserted into the support mounting portion.

[0016] In this way, the elastic support can be directly bonded to the fabric base, or it can be detachably connected through the support mounting part. Users can install and remove elastic support with different elasticity at any time according to their own needs, adapting to different sports scenarios and different support requirements. When the elastic support loses elasticity or is damaged after long-term use, the elastic support can be replaced individually without replacing the entire knee brace, which can reduce usage costs and extend the overall lifespan of the knee brace.

[0017] As an optional implementation, the knee brace further includes: gauze disposed on the first surface, the gauze wrapping the metal circuit, and the length a along the first direction not greater than the maximum distance b between the first electrode and the third electrode.

[0018] In this way, the gauze can cover and isolate the metal wires between the fabric base and the skin, preventing the metal wires from directly contacting the skin and causing discomfort. It also prevents sweat from directly penetrating the metal wires, further improving conductivity. At the same time, the gauze can prevent the waterproof coating on the surface of the metal wires from being exposed and worn away during long-term use, thus preventing the knee brace from losing its waterproof and sweatproof effect. The length of the gauze is controlled to be no greater than the maximum spacing between the first and third electrodes, which can completely cover the metal wires in the middle area without obstructing all four electrodes, avoiding affecting the direct contact between the electrodes and the skin, ensuring the conduction effect of electrical stimulation. At the same time, the gauze has good moisture absorption, which can absorb sweat on the skin surface, improving the dryness and comfort of wearing it.

[0019] As an optional implementation, the knee brace further includes a control module electrically connected to the electrodes, the electrodes being capable of acquiring muscle movement signals, the control module being detachably mounted on the second surface of the fabric substrate, and the control module having a rechargeable power source.

[0020] In this way, the control module can output stimulation currents with corresponding parameters to each electrode according to different treatment needs, realizing different modes of electrical stimulation therapy to meet the rehabilitation needs of different users and different stages of injury. Simultaneously, the electrodes can also collect the motion electrical signals of the muscles around the patella, transmitting them to the control module for analysis and processing. This allows users and doctors to understand the muscle activity status and recovery progress, facilitating adjustments to the rehabilitation plan. The detachable design allows for easy removal of the control module when cleaning the knee brace, preventing damage during the cleaning process and facilitating charging. The integrated rechargeable power supply eliminates the need for frequent battery replacements, making it more convenient and environmentally friendly. A mounting base can be installed on the fabric base, and the control module can be detachably connected to the mounting base via magnetic attraction. After the control module is installed on the mounting base, it can achieve electrical connection with the metal wiring.

[0021] This application also discloses a control method for a knee brace, the knee brace including electrodes, the control method comprising: Collect muscle movement signals to determine whether the knee is in motion; If the knee is in motion, a stimulating current is emitted through the electrodes to stimulate the knee; if the knee is not in motion, the stimulating current is stopped.

[0022] In this way, by judging the knee's movement status through muscle movement signals, the system can automatically adjust the electrical stimulation output status according to the user's activities. Electrical stimulation therapy is automatically activated during exercise to help stabilize the knee joint and relieve pressure on the knee during activity, while stimulation is automatically stopped during rest. This reduces unnecessary power consumption, extends the duration of each use, and avoids unnecessary electrical stimulation during rest, thus improving the user experience. Furthermore, the control logic that automatically recognizes the movement status eliminates the need for manual switching of working modes, making operation more intelligent and convenient, and more user-friendly for users in the rehabilitation phase with limited mobility.

[0023] As an optional implementation, the control electrode generates a low-frequency pulsed current, including: The corresponding gait interval is obtained based on the user's walking speed. When the user's leg wearing the knee brace is in the preset gait interval, the control electrode generates a low-frequency pulse current.

[0024] Thus, the corresponding gait interval can be obtained based on the user's walking speed within a preset gait frequency threshold range. First, the user's current walking speed is calculated using collected muscle movement signals, and then a corresponding gait interval is matched. During walking, the force on the knee joint and the muscle exertion state differ at different gait intervals. Stimulating current is output only in preset key gait intervals, precisely providing electrical stimulation assistance during muscle contraction phases to strengthen muscle contraction power and help share the pressure on the knee joint. Stimulation output is stopped in other gait phases, allowing muscles to relax naturally. This not only improves the targeted effect of electrical stimulation-assisted exercise rehabilitation but also further reduces ineffective power consumption and extends the single-use duration of the control module's power supply.

[0025] Compared with the prior art, the beneficial effects of this application are: The knee brace provided in this application uses a clamping position formed between elastic support members to position the patella. This allows the user to quickly align the brace, ensuring that multiple electrodes positioned around the clamping position accurately correspond to pre-set treatment points around the patella. This reduces the probability of electrode displacement and ensures the stability and effectiveness of the electrical stimulation therapy. Simultaneously, the two elastic support members provide auxiliary support to both sides of the knee joint, reducing abnormal swaying during knee joint movement and further enhancing the brace's protective effect. The structure of a flexible substrate embedded in a fabric base to carry the metal wiring ensures the overall flexibility and fit of the knee brace while improving the stability of the metal wiring layout and extending the lifespan of the knee brace. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the exploded structure of the knee brace disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the knee brace disclosed in the embodiments of this application; Figure 3 This is another structural schematic diagram of the knee brace disclosed in the embodiments of this application; Figure 4 This is a schematic diagram of the knee brace from another angle, as disclosed in the embodiments of this application; Figure 5 This is a structural schematic diagram of the knee brace disclosed in an embodiment of this application from another angle; Figure 6 This is a flowchart illustrating the knee brace control method disclosed in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures: 100 - Fabric substrate; 11 - First surface; 12 - Second surface; 13 - Flexible substrate; 14 - First edge; 15 - Second edge; 16 - Third edge; 17 - Fourth edge; 200 - Metal line; 300 - Elastic support; 400 - Electrode; 41 - First electrode; 42 - Second electrode; 43 - Third electrode; 44 - Fourth electrode; 500 - Cross-fixing strap; 600 - Hook and loop fastener; 700 - Hook and loop fastener; 800 - Protective pad; 900 - Gauze; 1000 - Support mounting part; x - First direction; y - Second direction. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. The described embodiments are only a part of this application, and not all of them. Other embodiments that can be obtained by those skilled in the art without creative effort based on the content of this application are all within the protection scope of this application.

[0030] The directional or positional terms used in this application, such as "upper," "lower," "inner," and "outer," are based on the directions shown in the accompanying drawings and are used only for descriptive purposes, not to limit the actual location or structure. Some terms may have other meanings in different contexts, and those skilled in the art should understand them according to the specific context.

[0031] The terms "installation," "setup," and "connection" should be interpreted broadly, including but not limited to fixed or detachable, mechanical or electrical, direct or indirect connection methods. The terms "first," "second," etc., are used only to distinguish objects and do not indicate importance or order.

[0032] The knee brace covers the entire knee and the electrodes are set on the knee brace. When the knee brace is in use, the electrodes must be fixed around the patella. However, when actually using the knee brace, patients may easily cause the electrodes to deviate from the preset position due to improper operation, which will affect the actual use effect.

[0033] Based on this, this application discloses a knee brace that can position the patella using elastic supports. When worn, the user can quickly adjust the knee brace according to the position of the elastic supports, ensuring that the electrodes positioned around the clamping area are accurately aligned with preset stimulation positions around the patella. This reduces the probability of the electrodes deviating from their preset positions and guarantees the effectiveness of the electrical stimulation therapy. Simultaneously, the two elastic supports also provide support to both sides of the knee, enhancing the knee brace's auxiliary support and protection effect.

[0034] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0035] Please see Figure 1 , Figure 1 This is an exploded structural diagram of the knee brace disclosed in an embodiment of this application. This application discloses a knee brace comprising: a fabric substrate 100, a metal circuit 200, two elastic support members 300, and multiple electrodes 400. The fabric substrate has a first surface 11 and a second surface 12. The first surface 11 is used to wrap the knee, and a flexible substrate is embedded in the fabric pores of the first surface 11. The metal circuit 200 is formed on the first surface 11. The two elastic support members 300 are disposed on the second surface 12 of the fabric substrate 100. The two elastic support members 300 are arranged opposite each other along a first direction x and extend along a second direction y. A clamping position for accommodating the patella is formed between the two elastic support members 300. The second direction y is configured to be parallel to the leg extension direction when the knee brace is worn. The multiple electrodes 400 are disposed on the fabric substrate 100 and electrically connected to the metal circuit 200. When the knee brace is worn, the electrodes 400 surround the clamping position and are used to generate a stimulating current.

[0036] Combination Figure 1 In some embodiments, the knee brace may include a fabric base 100 and metal circuitry 200. The fabric base 100 is made of fabric, which has good softness and deformability. It can bend and stretch synchronously with the deformation of muscles, unlike rigid circuit boards which limit the overall deformation capability of the sensor. At the same time, a flexible substrate is embedded in the fabric pores of the first surface 11 of the fabric base 100. The flexible substrate can fill the pores to provide a stable support for the metal circuitry 200, ensuring the stability of the metal circuitry 200 layout, without significantly sacrificing the overall softness. Moreover, the combination of the fabric and the flexible substrate can also ensure the strength of the overall structure, avoiding the problem of the metal circuitry 200 breaking or falling off after long-term deformation, improving the stability of the washable flexible fabric circuit board, and extending its service life.

[0037] In some embodiments, the metal lines 200 are directly formed on the first surface 11 embedded with the flexible substrate, and can be directly used as conductive lines, eliminating the need for an additional rigid circuit board structure and further ensuring the overall flexibility of the sensor. The metal lines 200 are directly formed on the first surface 11 embedded with the flexible substrate, replacing the rigid wiring structure of the traditional rigid circuit board, and further improving the flexibility of the overall structure.

[0038] In some embodiments, the flexible substrate may be a silicone substrate or a plastic film substrate. Specifically, the silicone substrate may be TPU (Thermoplastic Polyurethane).

[0039] In some embodiments, the metal circuit 200 can be made of silver paste. The circuit after silver paste printing has low resistance and good conductivity. At the same time, it also has a certain degree of flexibility and can deform together with the fabric substrate 100. It is not easy to have embrittlement and breakage problems, and its service life is also longer.

[0040] In some embodiments, the stimulation current can be a low-frequency pulsed current. The low-frequency pulsed current can penetrate deep muscle tissue and provide a gentle stimulation to the target muscle group. It can relax tense and spasmodic muscles, promote local blood circulation, relieve inflammation and pain in the knee joint, and also train and activate atrophied muscles, helping the muscles around the patella to regain strength and better maintain knee joint stability. It is suitable for long-term rehabilitation training.

[0041] In some embodiments, the metal circuit 200 can be transferred to the fabric substrate 100 by printing silver paste onto a flexible substrate and then embedding the flexible substrate with the metal circuit 200 onto the fabric substrate 100 through a hot pressing process. This preparation method is simple and efficient, eliminating the need for direct printing on the soft fabric surface, reducing processing difficulty, improving the molding accuracy and yield of the metal circuit 200, ensuring the bonding stability between the metal circuit 200 and the fabric substrate 100, and reducing production costs.

[0042] In some embodiments, a waterproof coating can be applied to the surface of the fabric substrate 100 and the metal circuit 200 to isolate body fluids such as sweat generated on the skin surface, preventing sweat from seeping into the metal circuit 200 and causing problems such as circuit corrosion and short circuits. This further ensures the conductivity stability of the metal circuit 200 and extends the service life of the washable flexible fabric circuit board. At the same time, the waterproof coating also has a certain degree of flexibility and will not affect the overall structure's ability to fit and deform.

[0043] Combination Figure 2 , Figure 2This is a schematic diagram of the knee brace disclosed in an embodiment of this application. In some embodiments, the knee brace may further include two elastic support members 300. The elastic support members 300 may be elastic strips or elastic plates made of silicone or rubber-like elastic materials, possessing a certain degree of support rigidity while also being able to adapt to deformation without excessively restricting leg movement. The two elastic support members 300 extend in a direction parallel to the leg's extension direction, leaving a clamping position in the middle to accommodate the patella. When wearing the brace, the user only needs to align the patella with the gap between the two elastic support members 300 to quickly complete the wearing and positioning without repeatedly adjusting the knee brace position, reducing the probability of electrode 400 misalignment when ordinary users wear it themselves. At the same time, the elastic support members 300 can apply appropriate support force to the collateral ligaments on both sides of the knee, which can help stabilize the knee joint, reduce abnormal knee swaying during exercise, and further improve the protective effect of the knee brace.

[0044] Combination Figure 2 In some embodiments, the knee brace may also include multiple electrodes 400. When the knee brace is worn, the electrodes 400 surround the clamping position and can directly surround the patella, simultaneously stimulating multiple stimulation points such as the quadriceps tendon, patellar ligament, upper point of the medial collateral ligament of the knee joint, and lower point of the medial collateral ligament of the knee joint. This covers multiple key treatment positions around the patella, ensuring the therapeutic effect of electrical stimulation on the recovery of knee joint strain. In conjunction with the positioning structure of the elastic support 300, each electrode 400 can be stably aligned with the preset treatment position, avoiding the problem of losing the therapeutic effect after a single electrode 400 shifts, further ensuring the therapeutic stability of electrical stimulation.

[0045] Combination Figure 2 In some embodiments, a cross-fixing strap 500 may also be provided on the fabric base 100. The cross-fixing strap 500 may be provided on two edges of the fabric base 100 along the first direction x. A hook and loop fastener 600 may be provided on the cross-fixing strap 500, and a corresponding hook and loop fastener 700 may be provided on the second surface 12 of the fabric base 100. The cross-fixing strap 500 is fixed by hook and loop fastener, which can further improve the stability of the knee brace when worn and prevent the knee brace from shifting.

[0046] According to an embodiment of the present invention, the knee brace positions the patella through a clamping position formed between the elastic support members 300. This allows the user to quickly align the brace, ensuring that the multiple electrodes 400 arranged around the clamping position accurately correspond to preset treatment points around the patella. This reduces the probability of electrode displacement and ensures the stability and effectiveness of the electrical stimulation therapy. Simultaneously, the two elastic support members 300 provide auxiliary support to both sides of the knee joint, reducing abnormal swaying during knee joint movement and further enhancing the protective effect of the knee brace. The structure of the flexible substrate embedded in the fabric base 100 to support the metal circuitry 200 ensures the overall flexibility and fit of the knee brace while improving the stability of the metal circuitry 200's layout and extending the lifespan of the knee brace.

[0047] Combination Figure 3 , Figure 3 This is another structural schematic diagram of the knee brace disclosed in the embodiments of this application ( Figure 3 and Figure 2 (The structures are the same, only the reference numerals differ). In some embodiments, the fabric substrate 100 has a first edge 14 and a second edge 15 opposite each other along a first direction x, and a third edge 16 and a fourth edge 17 opposite each other along a second direction y; the plurality of electrodes 400 includes: a first electrode 41, a second electrode 42, a third electrode 43 and a fourth electrode 44, the first electrode 41 and the second electrode 42 being disposed near the first edge 14, the third electrode 43 and the fourth electrode 44 being disposed near the second edge 15, the second electrode 42 being disposed near the corner between the fourth edge 17 and the first edge 14, and the first electrode 44 being disposed near the corner between the fourth edge 17 and the first edge 14 along the second direction y. The first electrode 41 is offset from the second electrode 42, and the first electrode 41 is closer to the second edge 15 than the second electrode 42. The third electrode 43 is positioned near the corner between the third edge 16 and the second edge 15. Along the second direction y, the fourth electrode 44 is offset from the third electrode 43, and the fourth electrode 44 is closer to the first edge 14 than the third electrode 43. So that when the knee brace is in the wearing state, the second electrode 42 and the fourth electrode 44 are respectively located on both sides of the clamping position along the leg extension direction, and the first electrode 41 and the third electrode 43 are respectively located on both sides of the clamping position along the first direction x.

[0048] Specifically, the four electrodes 400 correspond to four different treatment points around the patella. The first electrode 41 and the third electrode 43 correspond to key stimulation points of the medial and lateral collateral ligaments of the knee joint, respectively. The second electrode 42 and the fourth electrode 44 correspond to the quadriceps tendon and the patellar ligament, respectively. They are distributed around the clamping position that accommodates the patella, which can cover the core stimulation area required for knee joint injury recovery and ensure the coverage of electrical stimulation treatment. At the same time, the staggered arrangement can avoid the patella position and prevent the electrodes 400 from directly compressing the patella and causing discomfort. It can also ensure that each electrode 400 can be stably attached to the corresponding muscle and ligament position to ensure the transmission effect of electrical stimulation. It is worth noting that when the patient wears the knee brace, the second electrode 42 can be aligned below the patella first, and then the elastic support 300 can be clamped on both sides of the patella to achieve positioning between the knee brace and the knee. After the knee brace is worn, the second electrode 42 can be located below the patella, the fourth electrode 44 can be located above the patella, the first electrode 41 can be located on the left side of the patella, and the third electrode 43 can be located on the right side of the patella, achieving a circumferential setting around the patella, covering the nerves around the patella, which is beneficial to improving the nerve stimulation effect of the knee brace and ensuring the stability and therapeutic effect of electrical stimulation therapy.

[0049] Combination Figure 4 , Figure 4 This is a schematic diagram of the knee brace from another angle, as disclosed in an embodiment of this application. In some embodiments, the second surface 12 of the fabric base 100 is provided with a hook and loop surface 700, the corner between the first edge 14 and the third edge 16 is provided with a first hook and loop surface 600, and the corner between the second edge 15 and the fourth edge 17 is provided with a second hook and loop surface 600.

[0050] Specifically, when wearing the knee brace, after wrapping the fabric base 100 around the knee area, the first and second hook-and-loop fasteners 600 can be attached to the hook-and-loop fastener 700 on the second surface 12. The tightness of the knee brace can be flexibly adjusted by adjusting the attachment position to fit different leg sizes. At the same time, the hook-and-loop fastener connection method is easy to install and remove, allowing users to quickly put on and take off the brace, making the operation more convenient.

[0051] Combination Figure 4 In some embodiments, both the first edge 14 and the second edge 15 have recesses, and the second surface 12 of the fabric substrate 100 is provided with two protective pads 800, which are located at the edges of the two recesses respectively.

[0052] Specifically, the first edge 14 and the second edge 15 can be straight for easy processing, or they can be recessed. The recessed part can avoid the popliteal fossa area, so it will not put pressure on the back of the popliteal fossa after wearing, and avoid compressing the blood vessels and nerves in the popliteal fossa after wearing for a long time, thus improving wearing comfort. The protective pad 800 set at the edge of the recessed part can reinforce the edge of the fabric, preventing the edge from curling, wearing and fraying after long-term use, extending the service life of the fabric base 100. At the same time, the protective pad 800 can also improve the softness of the edge, preventing the hard edge from rubbing against the skin and causing discomfort.

[0053] Combination Figure 4 In some embodiments, electrode 400 is a flexible electrode 400, which is circular and has a diameter d that satisfies: 50mm≤d≤70mm.

[0054] Specifically, the electrode 400 can be in various shapes such as polygonal, elliptical, and circular. The electrode 400 is sheet-like, and the circular flexible electrode 400 can conform evenly to the skin without sharp edges, so as not to cause pressure or discomfort to the skin. By controlling the diameter between 50mm and 70mm, sufficient conductive contact area can be ensured to reduce the contact resistance of the stimulation current and ensure the transmission efficiency of electrical stimulation. At the same time, the electrode 400 area will not take up too much space due to excessive size, avoiding mutual interference between adjacent electrodes 400. It can also avoid the patella position and adapt to the knee joint size of most adults, ensuring that all four electrodes 400 can be accurately aligned with the corresponding stimulation points.

[0055] Combination Figure 5 , Figure 5 This is a schematic diagram of the knee brace structure from another angle, as disclosed in an embodiment of this application. In some embodiments, the second surface 12 of the fabric base 100 is provided with a support mounting portion 1000, and the elastic support 300 is detachably inserted into the support mounting portion 1000.

[0056] Specifically, the elastic support component 300 can be directly bonded to the fabric base 100, or it can be detachably connected via the support component mounting part 1000. Users can easily install and remove elastic support components 300 with different elasticities to suit different sports scenarios and support needs. When the elastic support component 300 experiences elasticity loss or damage after long-term use, it can be replaced individually without replacing the entire knee brace, thus reducing usage costs and extending the overall lifespan of the knee brace.

[0057] Combination Figure 4 In some embodiments, the knee brace further includes: gauze 900 disposed on the first surface 11, the gauze 900 wrapping the metal wire 200, and the length a along the first direction x is not greater than the maximum distance b between the first electrode 41 and the third electrode 43.

[0058] Specifically, the gauze 900 can cover and isolate the metal wire 200 between the fabric base 100 and the skin, preventing the metal wire 200 from directly contacting the skin and causing discomfort. It can also prevent skin sweat from directly penetrating the metal wire 200, further improving conductivity stability. At the same time, the gauze 900 can also prevent the waterproof coating on the surface of the metal wire 200 from being exposed and worn away during long-term use, causing the knee brace to lose its waterproof and sweatproof effect. The length of the gauze 900 is controlled to be no greater than the maximum spacing between the first electrode 41 and the third electrode 43. This allows it to completely cover the metal wire 200 in the middle area without obstructing the four electrodes 400, avoiding direct contact between the electrodes 400 and the skin, ensuring the conduction effect of electrical stimulation. In addition, the gauze 900 has good moisture absorption, which can absorb sweat on the skin surface, improving the dryness and comfort of wearing it.

[0059] In some embodiments, the knee brace further includes a control module electrically connected to an electrode 400, the electrode 400 being capable of acquiring muscle movement signals, the control module being detachably disposed on a second surface 12 of a fabric substrate 100, and the control module having a rechargeable power source.

[0060] Specifically, the control module can output stimulation currents with corresponding parameters to each electrode 400 according to different treatment needs, realizing different modes of electrical stimulation therapy to meet the rehabilitation needs of different users and different stages of injury. Simultaneously, the electrodes 400 can also collect the motion electrical signals of the muscles around the patella and transmit them to the control module for analysis and processing, allowing users and doctors to understand the muscle activity status and recovery progress, facilitating adjustments to the rehabilitation plan. The detachable design allows for easy removal of the control module when cleaning the knee brace, preventing damage during the cleaning process and facilitating charging. The integrated rechargeable power supply eliminates the need for frequent battery replacements, making it more convenient and environmentally friendly. A mounting base can be installed on the fabric base 100, and the control module can be detachably connected to the mounting base via magnetic attraction. After the control module is installed on the mounting base, it can achieve electrical connection with the metal circuit 200.

[0061] In practical use, the user first aligns the patella with the clamping position between the two elastic supports 300 to determine the wearing position of the knee brace. Then, the fabric base 100 is wrapped around the knee area, and the first and second Velcro hook surfaces 600 are respectively attached and fixed to the Velcro loop surface 700 to complete the wearing process. After wearing, multiple electrodes 400 are accurately aligned with the preset stimulation points around the patella. The control module can use the electrodes 400 to collect muscle movement signals to determine the knee's movement status. When the knee is in motion, the control module automatically controls the electrodes 400 to output low-frequency pulse stimulation current with corresponding parameters to provide electrical stimulation therapy to the muscles and ligaments around the knee, helping to relieve discomfort caused by knee joint strain, strengthen the muscles around the knee, and assist in the recovery of knee joint injuries. When the knee is detected to be in a static state, the stimulation current is automatically stopped to reduce unnecessary energy consumption and extend the single use time of the knee brace. Users can also remove the elastic supports 300 or the control module according to their own needs to wash and clean the fabric base 100 to ensure the hygiene of the knee brace.

[0062] Combination Figure 6 , Figure 6 This is a flowchart illustrating the control method for a knee brace disclosed in an embodiment of this application. The embodiment of this application also discloses a control method for a knee brace, the knee brace including an electrode 400. The control method includes: acquiring muscle movement signals to determine whether the knee is in motion; if the knee is in motion, emitting a stimulating current through the electrode 400 to stimulate the knee; if the knee is not in motion, stopping the generation of the stimulating current.

[0063] Specifically, by judging the knee's movement status through muscle movement signals, the system can automatically adjust the electrical stimulation output status according to the user's activities. Electrical stimulation therapy is automatically activated during exercise to help stabilize the knee joint and relieve pressure on the knee during activity, while stimulation is automatically stopped during rest. This reduces unnecessary power consumption, extends the duration of each use, and avoids unnecessary electrical stimulation during rest, thus improving the user experience. Furthermore, the automatic recognition of movement status control logic eliminates the need for manual switching of working modes, making operation more intelligent and convenient, and more user-friendly for users in the rehabilitation phase with limited mobility.

[0064] Combination Figure 6 In some embodiments, the control electrode 400 generates a low-frequency pulse current, including: obtaining a corresponding gait interval based on the user's walking speed, and generating a low-frequency pulse current when the user's knee brace leg is in a preset gait interval.

[0065] Specifically, the corresponding gait interval can be obtained based on the user's walking speed, which can be a preset gait frequency threshold range. First, the user's current walking speed is calculated by collecting muscle movement signals, and then a corresponding gait interval is matched. During walking, the force on the knee joint and the muscle exertion state differ at different gait intervals. Stimulating current is output only in preset key gait intervals, which can precisely provide electrical stimulation assistance during the muscle contraction phase, strengthen the muscle contraction force, and help share the pressure on the knee joint. Stimulation is stopped in other gait phases to allow the muscles to relax naturally. This not only improves the targeted effect of electrical stimulation-assisted exercise rehabilitation but also further reduces ineffective power consumption and extends the single-use time of the control module's power supply.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and do not constitute a limitation. The embodiments can be freely combined without conflict. Although each embodiment has been described in detail, those skilled in the art should understand that modifications can still be made to the technical solutions or equivalent substitutions can be made to the technical features, and all such modifications or substitutions should be covered within the scope of the technical solutions of this application.

Claims

1. A knee brace, characterized in that, include: A fabric substrate (100) having a first surface (11) and a second surface (12), the first surface (11) being used to wrap the knee, and a flexible substrate being embedded in the fabric pores of the first surface (11); Metal lines (200) are formed on the first surface (11); Two elastic support members (300) are disposed on the second surface (12) of the fabric base (100). The two elastic support members (300) are disposed opposite each other along a first direction (x) and extend along a second direction (y). A clamping position for accommodating the patella is formed between the two elastic support members (300). The second direction (y) is configured to be parallel to the extension direction of the leg when the knee brace is in the wearing state. Multiple electrodes (400) are disposed on the fabric substrate (100) and electrically connected to the metal circuit (200). When the knee brace is worn, the electrodes (400) surround the clamping position and are used to generate a stimulating current.

2. The knee brace according to claim 1, characterized in that, The fabric substrate (100) has a first edge (14) and a second edge (15) opposite each other along the first direction (x), and a third edge (16) and a fourth edge (17) opposite each other along the second direction (y). The plurality of electrodes (400) includes: a first electrode (41), a second electrode (42), a third electrode (43), and a fourth electrode (44). The first electrode (41) and the second electrode (42) are disposed near the first edge (14), the third electrode (43) and the fourth electrode (44) are disposed near the second edge (15), and the second electrode (42) is disposed near the corner between the fourth edge (17) and the first edge (14). Along the second direction (y), the first electrode (41) and the second electrode (42) are staggered, and the first electrode (41) is closer to the second electrode (42) than the second electrode (42). The second edge (15) and the third electrode (43) are located near the corner between the third edge (16) and the second edge (15). Along the second direction (y), the fourth electrode (44) is offset from the third electrode (43) and the fourth electrode (44) is closer to the first edge (14) than the third electrode (43). When the knee brace is in the wearing state, the second electrode (42) and the fourth electrode (44) are located on both sides of the clamping position along the extension direction of the leg, and the first electrode (41) and the third electrode (43) are located on both sides of the clamping position along the first direction (x).

3. The knee brace according to claim 2, characterized in that, The second surface (12) of the fabric base (100) is provided with a hook and loop side (700), the corner between the first edge (14) and the third edge (16) is provided with a first hook and loop side (600), and the corner between the second edge (15) and the fourth edge (17) is provided with a second hook and loop side (600).

4. The knee brace according to claim 2, characterized in that, Both the first edge (14) and the second edge (15) have recesses, and the second surface (12) of the fabric substrate (100) is provided with two protective pads (800), which are located at the edges of the two recesses respectively.

5. The knee brace according to claim 1, characterized in that, The electrode (400) is a flexible electrode (400), and the electrode (400) is circular with a diameter d satisfying: 50mm≤d≤70mm.

6. The knee brace according to claim 1, characterized in that, The second surface (12) of the fabric substrate (100) is provided with a support mounting portion (1000), and the elastic support (300) is detachably inserted into the support mounting portion (1000).

7. The knee brace according to claim 1, characterized in that, The knee brace further includes: gauze (900) disposed on the first surface (11), the gauze (900) wrapping the metal circuit (200), and the length a along the first direction (x) is not greater than the maximum distance b between the first electrode (41) and the third electrode (43).

8. The knee brace according to claim 1, characterized in that, The knee brace also includes a control module electrically connected to the electrode (400), the electrode (400) being capable of collecting muscle movement signals, the control module being detachably mounted on the second surface (12) of the fabric base (100), and the control module having a rechargeable power source.

9. A method for controlling a knee brace, characterized in that, The knee brace includes electrodes (400), and the control method includes: Collect muscle movement signals to determine whether the knee is in motion; If the knee is in motion, a stimulating current is emitted through the electrode (400) to stimulate the knee; if the knee is not in motion, the stimulating current is stopped.

10. The control method according to claim 9, characterized in that, The control electrode (400) generates a low-frequency pulse current, including: The corresponding gait interval is obtained based on the user's walking speed. When the user's leg wearing the knee brace is in the preset gait interval, the control electrode (400) generates a low-frequency pulse current.

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