Dual-band physiotherapy instrument

Abstract

The invention relates to the technical field of medical instruments, in particular to a dual-band physiotherapy instrument which comprises a protective net, a rear shell fixedly arranged on the protective net and a heating disc fixedly arranged on the inner side of the rear shell. The heating disc comprises a radiant panel which faces the protective net and is used for generating a first wave band and a second wave band; the heating plate is fixedly arranged on the surface of the side, away from the protective net, of the radiant panel and used for heating the radiant panel; the heat insulation cover and the radiant panel define a sealed heat insulation space, and the heating plate is located in the heat insulation space; wherein the heating plate and the radiant panel are coaxially arranged; the peripheral surface of the radiant panel is attached to the heat insulation cover to form a heat insulation space; the peripheral face of the heating plate and the heat insulation cover are arranged at intervals. The heating plate and the radiation plate are coaxially arranged, heat is concentrated in the peripheral area of the heating plate, the central area of the radiation plate is attached to the heating plate, heat is sufficient, the temperature uniformity of the heating plate is good, the whole radiation plate is heated evenly, and the treatment effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a dual-band physiotherapy device. Background Technology

[0002] Physiotherapy devices (such as TDP electromagnetic wave therapy devices, which will be described below) are now widely used. Their core components are a heater and a TDP radiation plate. The TDP radiation plate has a unique coating. This coating is typically 0.3-0.6 mm thick, and at a specific heating temperature, the TDP radiation plate can generate wavelengths ranging from 2.0-25 μm and intensities ranging from 25-35 mw / cm². 2 Specific electromagnetic waves within the body. These electromagnetic waves match the absorption spectrum of human cells, enabling organisms to absorb, transmit, transform, and utilize them, thereby producing biological effects.

[0003] In existing technologies, TDP electromagnetic wave therapy devices typically use a base center as the center, with heating tubes arranged in a "C," "U," or "W" shape and fixed to the base. This design effectively reduces the heating tube length, lowers the actual manufacturing difficulty, and increases the yield rate, thereby reducing the production cost of the heating tubes. After the heating tubes are activated, they heat the radiation plate, causing the plate to generate electromagnetic waves of a specific wavelength for therapeutic purposes. However, in this structure, heat is mainly concentrated around the periphery of the heating tubes, with heat gradually decreasing towards the center of the base. This results in insufficient heat in the central area, ultimately causing poor temperature uniformity of the heater and uneven heating of the entire radiation plate, thus affecting the therapeutic effect.

[0004] Therefore, how to overcome the shortcomings of the existing technology is the subject of this invention. Summary of the Invention

[0005] The purpose of this invention is to provide a dual-band physiotherapy device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A dual-band physiotherapy device includes a protective net, a rear shell fixedly disposed on the protective net, and a heating plate fixedly disposed on the inner side of the rear shell;

[0008] The heating plate includes:

[0009] A radiating plate, positioned facing the protective net, is used to generate a first waveband and a second waveband;

[0010] A heating plate is fixedly disposed on the surface of the radiant plate away from the protective net, and is used to heat the radiant plate;

[0011] A heat insulation cover, together with the radiant plate, forms a sealed heat insulation space, and the heating plate is located within the heat insulation space;

[0012] The heating plate and the radiant plate are coaxially arranged; the outer peripheral surface of the radiant plate is attached to the heat insulation cover to form the heat insulation space; the outer peripheral surface of the heating plate and the heat insulation cover are spaced apart.

[0013] The physiotherapy device mentioned in this application may be an electromagnetic wave therapy device.

[0014] The protective net can be assembled with the back shell by means of threaded connection or snap-on connection to form a protective space for protecting the heating plate. The method of fixing the heating plate to the protective space is not limited here.

[0015] The protective net, heating plate, and radiation plate can all be disc-shaped and coaxially arranged, with the diameter of the heating plate being smaller than that of the radiation plate.

[0016] The rear shell may have mounting holes to facilitate the installation of the electromagnetic wave therapy device on the bracket. The rear shell may also have ventilation holes.

[0017] The heat shield and the radiant panel enclose a heat-insulating space, allowing the heating plate to be considered a closed structure. The heat shield can be made of stainless steel.

[0018] When the electromagnetic wave therapy device is working, the heating plate converts electrical energy into heat energy. Since the heating plate is fixed to the inner surface of the radiation plate (the side of the radiation plate furthest from the protective mesh), the heat generated by the heating plate can be concentrated on the radiation plate. After receiving the heat from the heating plate, the radiation plate simultaneously radiates a first band (described below using near-infrared light as an example) and a second band (described below using far-infrared light as an example) towards the protective mesh. This dual-band infrared light passes through the protective mesh and directly irradiates the area of ​​the body requiring treatment. The heating plate can be electrically connected to the PCB circuit board described below.

[0019] Both the heating plate and the radiant plate are disc-shaped and coaxially arranged. With this structure, the heat is concentrated in the periphery of the heating plate, while the central area of ​​the radiant plate receives sufficient heat due to its close contact with the heating plate. This results in better temperature uniformity of the heating plate and more uniform heating of the radiant plate as a whole, ensuring the therapeutic effect.

[0020] This can be considered as the heating plate having a smaller diameter than the radiation plate. This reduces direct heat conduction from the heating plate to the outer periphery of the radiation plate, thereby reducing the amount of heat transferred from the outer periphery of the radiation plate to the heat shield in contact with it. This allows more heat to act on the center of the radiation plate and the effective radiation area through radiation and air conduction, thus meeting the design requirement of directional radiation from the radiation plate to the protective net. This allows the heat to be more concentratedly converted into directional dual-band infrared rays, thereby improving the targeting of the physiotherapy and the energy utilization efficiency.

[0021] This application uses a heating plate as the heating element. Compared with microcrystalline fiber cloth heating lamps, the heating plate has superior insulation and high-temperature resistance, which can reduce safety hazards under long-term high-temperature operation of the heating element and extend its service life. Moreover, the radiant plate and the heat insulation cover form a closed heating plate, so that the heat generated by the heating plate is mainly radiated to the human body through the radiant plate facing the protective net, reducing heat loss through the back shell (mainly the heat dissipation holes on the back shell), improving heat utilization efficiency, and the heat insulation cover can further enhance the heat insulation effect.

[0022] The heating plate and the radiant plate remain relatively fixed. For example, multiple retaining plates are distributed circumferentially on the outer side of the radiant plate, while multiple retaining slots that mate with the retaining plates are distributed circumferentially on the outer side of the heating plate. Through the engagement of the retaining plates and slots, a stable connection between the heating plate and the radiant plate is achieved, preventing relative rotation during use and ensuring that the heating plate remains stably positioned within the preset location on the inner surface of the radiant plate, thus guaranteeing the stability and uniformity of heat transfer. Furthermore, this retaining structure eliminates the need for additional complex connectors, simplifying the assembly process and improving production efficiency.

[0023] In a further technical solution, the heating plate is a mica heating plate or an epoxy resin heating plate, which can achieve uniform and stable heat output, provide a stable energy foundation for the radiation plate, and ensure that the radiation plate can continuously and stably emit electromagnetic waves.

[0024] The radiating plate comprises a galvanized sheet and near-infrared and far-infrared coatings formed on the outer surface of the galvanized sheet. These two coatings generate a first wavelength band (near-infrared) and a second wavelength band (far-infrared). Based on this, the good structural stability and thermal conductivity of the galvanized sheet can be utilized to receive heat transferred from the heating plate, and the near-infrared and far-infrared coatings on the outer surface of the galvanized sheet allow the radiating plate to simultaneously generate both near-infrared and far-infrared wavelengths. The near-infrared and far-infrared coatings can be formed by spraying coatings containing graphene materials. The distribution of the near-infrared and far-infrared coatings on the outer surface of the galvanized sheet is not limited.

[0025] Epoxy resin heating plates are made by high-temperature pressing of alloy heating strips and glass fiber reinforced epoxy resin boards, offering advantages such as rapid and uniform heating, and high thermal efficiency. Mica heating plates fully utilize the high-temperature resistance and electrical insulation properties of mica material, resulting in high thermal efficiency and energy savings. They also reduce safety hazards caused by decreased insulation performance of heating elements under long-term high-temperature operation.

[0026] The heating plate can also be a ceramic heating plate. Preferably, the heating plate is a non-metallic heating plate.

[0027] A further technical solution also includes a first heat insulation plate and a heat reflector plate, both fixedly installed within the heat insulation space and both facing the protective net;

[0028] The first heat insulation plate is fixedly disposed on the surface of the heat reflector away from the protective net;

[0029] At least one of the first heat insulation plate and the heat reflector plate is sealed and fitted to the wall of the heat insulation cover, preferably both of them are fitted to the wall of the heat insulation cover.

[0030] A heat reflector can reflect the heat emitted by the heating plate from the rear (the direction away from the radiant plate) back into the heating plate (or reflect it in the direction of the heating plate), reducing heat loss to the rear and concentrating more heat on the radiant plate, thereby improving heat utilization efficiency.

[0031] The first heat insulation plate can block the residual heat that may be transmitted to the rear after being reflected by the heat reflector plate, preventing this heat from being conducted to the external environment through the rear shell. This further improves the heat utilization efficiency and prevents the rear shell temperature from becoming too high, thus eliminating related safety hazards.

[0032] The first heat insulation board can be a mica heat insulation board, and the heat reflector can be a galvanized sheet. The excellent heat insulation performance of the mica heat insulation board combined with the good reflective properties of the galvanized sheet can ensure the heat insulation and heat recovery effect. Through synergistic cooperation, it can be regarded as a heating plate with a closed structure, which further ensures the efficient and stable operation of the electromagnetic wave therapy device in this application, especially in terms of the stable generation of the first and second wave bands by the radiation plate and the reduction of the risk of failure of the electromagnetic wave therapy device.

[0033] Preferably, the thickness of the first heat insulation plate is 1.5mm-1.7mm. This thickness ensures good heat insulation and effectively blocks residual heat that may be transmitted to the rear after being reflected by the heat reflector plate. It also avoids increasing the weight and volume of the electromagnetic wave therapy device due to excessive thickness, thus fitting the compact design of the TDP electromagnetic wave therapy device.

[0034] Preferably, the thickness of the heat reflector is 0.4mm-0.5mm. While ensuring sufficient structural strength to stabilize the heat emitted by the heating plate and reduce heat loss, it can reduce the amount of material used and weight. The thinner thickness can fit the assembly space better and form an efficient heat insulation and reflection combination with the first heat insulation plate, further enhancing the heat utilization efficiency and ensuring the heat concentration of the closed heating plate.

[0035] Preferably, the distance between the heat reflector and the heating plate is 8mm-12mm. This provides a suitable space for reflecting the heat emitted by the heating plate, allowing the heat reflector to effectively capture and reflect the heat radiated by the heating plate. It also avoids the problem of excessive heat concentration between the heat reflector and the heating plate due to a small distance, which would affect the heat dissipation stability of the heating plate. If the distance is not too large, it can avoid the problems of reduced reflection efficiency and heat waste.

[0036] A further technical solution is that a first screw extending along the thickness direction of the radiant plate is fixedly provided on the surface of the radiant plate near the heating plate, and the first screw passes through the heating plate, the heat reflector plate and the first heat insulation plate in sequence;

[0037] The heating plate and the heat reflector are provided with a first limiting part that is threadedly connected to the first screw, and the side of the first heat insulation plate away from the heating plate is provided with a second limiting part that is threadedly connected to the first screw.

[0038] The first limiting part and the second limiting part cooperate to position the first heat insulation plate and the heat reflector plate.

[0039] For example, the heating plate may have a through hole through which the first screw passes.

[0040] For example, the first limiting part is threadedly connected to the first screw. The specific structure of the first limiting part is not limited, such as it can be a nut.

[0041] The cooperation of the first and second limiting parts ensures that the heat reflector, the first heat insulation plate, and the heating plate remain relatively fixed. The threaded connection of the first and second limiting parts facilitates assembly and adjustment. The distance between the heat reflector (and the first heat insulation plate) and the heating plate can be adjusted by rotating and adjusting the positions of the first and second limiting parts on the first screw, thereby providing suitable reflection space for the heat emitted backward by the heating plate.

[0042] In a further technical solution, the first screw passes through the end of the heat insulation cover away from the protective net. On the side of this end away from the protective net, a washer and a first nut threadedly connected to the first screw are arranged in sequence. The washer is sleeved on the first screw and tightly attached to the heat insulation cover.

[0043] The gasket is pressed against the heat insulation cover by the first nut, thereby firmly connecting the radiant plate, heating plate and heat insulation cover into one unit by the first screw. It can also ensure the sealing and structural strength of the heating plate. The sealing can prevent heat from being lost from gaps (such as the gap between the heat insulation cover and the gasket), and further improve the heat utilization efficiency.

[0044] The gasket can be seen as increasing the effective area of ​​the first nut on the heat insulation cover, preventing the first nut from directly pressing the heat insulation cover and causing excessive local pressure on the heat insulation cover, thus protecting the heat insulation cover.

[0045] Further technical solutions also include a second heat insulation plate, a PCB circuit board, and indicator lights, all disposed on the inner side of the rear shell;

[0046] The second heat insulation plate is fixedly installed at the bottom end of the heat insulation cover (i.e., the end away from the protective net) on the side away from the radiation plate;

[0047] The PCB circuit board is fixedly mounted on the side of the second heat insulation plate away from the radiation plate;

[0048] The indicator light is fixedly mounted on and electrically connected to the PCB circuit board.

[0049] The second heat insulation plate can block a small amount of heat transmitted to the rear by the heat insulation cover, preventing this heat from affecting the electronic components on the PCB circuit board and ensuring the stable operation and service life of the circuit system.

[0050] Indicator lights visually display the working status of the electromagnetic wave therapy device, allowing users to easily understand whether the device is operating and improving its ease of use. For example, a blue light indicates normal operation, while a red light indicates a malfunction. The integration of the indicator lights with the PCB circuit board is standard and will not be elaborated upon here.

[0051] Preferably, the PCB circuit board is equipped with a thermal fuse. In the event of a malfunction in the electromagnetic wave therapy device causing an abnormal temperature rise, the thermal fuse can melt in time to cut off the circuit, preventing safety hazards caused by continuous high temperatures in components such as the heating plate.

[0052] In a further technical solution, the second heat insulation plate is spaced apart from the PCB circuit board, thereby providing space for the indicator light;

[0053] The indicator light is fixedly mounted on the surface of the PCB circuit board near the second heat insulation plate;

[0054] The second heat insulation plate has a light-transmitting hole corresponding to the indicator light; the orthographic projection of the indicator light on the PCB circuit board is covered by the orthographic projection of the light-transmitting hole on the PCB circuit board.

[0055] The light-transmitting holes allow the indicator lights to shine towards the protective mesh, enabling users to observe the status of the indicator lights from outside the device and understand the operation of the electromagnetic wave therapy instrument. The size of the light-transmitting holes can be adjusted according to actual needs.

[0056] The second heat insulation board can be a transparent epoxy resin heat insulation board, which can effectively block the heat generated by the heating plate from being transferred to the PCB circuit board due to its good heat insulation performance. Its transparency can also conduct the light of the indicator light more smoothly, ensuring that users can clearly observe the status of the indicator light to understand the working status of the electromagnetic wave therapy device.

[0057] Preferably, a wire tube is fixed to the side of the heating plate facing the heat reflector. Part of the wire tube is located on the side of the heat insulation cover closest to the light-transmitting hole. A wire electrically connected to the heating plate passes through the wire tube and through the light-transmitting hole. The PCB circuit board and the heating plate are electrically connected via the wire. Furthermore, the wire tube provides stable protection and restraint for the wire passing through it and electrically connected to the heating plate, preventing displacement, wear, or unnecessary contact with other components due to vibration, heat, or other factors within the device. This ensures the structural integrity of the wire and the stability of the electrical connection, while also reducing safety hazards during the use of the electromagnetic wave therapy device.

[0058] In a further technical solution, the bottom end of the heat insulation cover, on the side away from the radiant plate, is provided with at least a portion of a second screw, a sleeve, and a third screw;

[0059] The second screw is fixedly mounted on the heat insulation cover;

[0060] The insert is threadedly connected to the second screw and the third screw respectively, and the insert abuts against the surface of the second heat insulation plate away from the PCB circuit board;

[0061] The third screw passes through the second heat insulation plate and the PCB circuit board, and a portion of the third screw abuts against the surface of the PCB circuit board away from the second heat insulation plate;

[0062] A support cylinder is sleeved on the third screw, and the support cylinder is located between the second heat insulation plate and the PCB circuit board and is in close contact with both.

[0063] The head of the second screw can be pressed against the bottom of the heat shield near the radiant plate by a gasket.

[0064] The second screw is connected to the heat insulation cover, the insert is connected to the second screw, the third screw is connected to the insert, and the support cylinder is connected to the third screw. The support cylinder is positioned between the second heat insulation plate and the PCB circuit board and is in close contact with both. A portion of the third screw presses against the surface of the PCB circuit board away from the second heat insulation plate. Based on these arrangements, the heat insulation cover, the second heat insulation plate, and the PCB circuit board form a single unit, thus securing the second heat insulation plate and the PCB circuit board.

[0065] The support cylinder is located between the second heat insulation plate and the PCB circuit board. The length of the support cylinder determines the distance between the second heat insulation plate and the PCB circuit board, which can provide space for the indicator light.

[0066] The third screw presses against the surface of the PCB circuit board away from the second heat insulation plate, which can be referred to as the description of the second screw pressing against the bottom of the heat insulation cover near the radiation plate.

[0067] There can be multiple second screws, inserts, third screws, and support cylinders, and the number of each can be the same. The corresponding gaskets can also be the same.

[0068] A further technical solution includes a fourth screw threaded to the rear housing, the fourth screw being fixed relative to the PCB circuit board by a second nut.

[0069] The rear housing may have screw holes corresponding to the fourth screw.

[0070] The shank of the fourth screw can be threaded into the second nut. At this point, the head of the fourth screw can engage with the second nut to clamp the PCB circuit board, fixing it to the inside of the rear housing. Since the heat shield, the second heat shield, and the PCB circuit board form a single unit, these structures can be installed using only the fourth screw and the second nut, eliminating the need for individual connections between each component and the rear housing, thus simplifying disassembly and installation. When the radiant plate, heating plate, and heat shield are securely connected as a single unit, the radiant plate and heating plate are also installed simultaneously.

[0071] In a further technical solution, the heat insulation cover has a conical structure;

[0072] The heat insulation cover includes a first cover plate parallel to the protective net and a second cover plate arranged around the first cover plate;

[0073] The first cover plate is connected to the second cover plate;

[0074] The first cover plate, the second cover plate, and the radiating plate together form the heat insulation space.

[0075] The heat shield is conical, comprising a first cover plate parallel to the protective net and a second cover plate surrounding the first cover plate. When the indicator light is operational, its emitted light can be transmitted along the inclined surface of the second cover plate towards the protective net. The inclined surface guides the light, allowing it to be more concentrated and diffused towards the protective net, reducing scattering and loss of light inside the device. This allows the user to more clearly observe the indicator light's status from the protective net side, providing a direct understanding of the electromagnetic wave therapy device's operation. It is understood that the outer periphery of the radiation plate is attached to the second cover plate. The above description of the corresponding heat shield can be found in the attached... Figure 1One corresponds to either the first cover plate or the second cover plate.

[0076] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0077] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0078] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0079] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0080] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0081] The working principle and advantages of this invention are as follows:

[0082] When the electromagnetic wave therapy device is working, the heating plate converts electrical energy into heat energy. Since the heating plate is fixed to the inner surface of the radiation plate (the side of the radiation plate away from the protective net), the heat generated by the heating plate can be concentrated on the radiation plate. After receiving the heat transferred by the heating plate, the radiation plate simultaneously radiates near-infrared and far-infrared wavelengths towards the protective net. These dual-band infrared rays pass through the protective net and then directly irradiate the part of the human body that needs physiotherapy.

[0083] The heating plate and the radiant plate are both disc-shaped and coaxially arranged. In this structure, the heat is concentrated in the periphery of the heating plate, while the central area of ​​the radiant plate receives sufficient heat because it is in close contact with the heating plate. This results in better temperature uniformity of the heating plate and more uniform heating of the radiant plate as a whole, thus ensuring the therapeutic effect.

[0084] To illustrate, the diameter of the heating plate is smaller than that of the radiation plate. This reduces direct heat conduction from the heating plate to the outer periphery of the radiation plate, thereby reducing the amount of heat transferred from the outer periphery of the radiation plate to the heat shield in contact with it. This allows more heat to act on the center of the radiation plate and the effective radiation area through radiation and air conduction. This meets the design requirement of directional radiation from the radiation plate towards the protective net, allowing the heat to be more concentratedly converted into directional dual-band infrared rays, thus improving the targeting and energy utilization efficiency of the physiotherapy.

[0085] This application uses a heating plate as the heating element. Compared with microcrystalline fiber cloth heating lamps, the heating plate has superior insulation and high-temperature resistance, which can reduce safety hazards under long-term high-temperature operation and extend the service life of the heating element. In addition, the radiant plate and the heat insulation cover form a closed heating plate, so that the heat generated by the heating plate is mainly radiated to the human body through the radiant plate facing the protective net, reducing heat loss through the back shell (mainly the heat dissipation holes on the back shell), improving heat utilization efficiency, and the heat insulation cover can further enhance the heat insulation effect. Attached Figure Description

[0086] Appendix Figure 1 This is a schematic diagram of the overall structure of the dual-band physiotherapy device from one perspective in an embodiment of the present invention;

[0087] Appendix Figure 2 This is a schematic diagram of the overall structure of the dual-band physiotherapy device from another perspective in an embodiment of the present invention;

[0088] Appendix Figure 3 This is one of the partial cross-sectional views of the dual-band physiotherapy device in an embodiment of the present invention;

[0089] Appendix Figure 4 For the appendix Figure 3 Enlarged view of point A in the middle;

[0090] Appendix Figure 5 This is a second partial cross-sectional view of the dual-band physiotherapy device in an embodiment of the present invention;

[0091] Appendix Figure 6 This is one of the partial structural schematic diagrams of the dual-band physiotherapy device in an embodiment of the present invention;

[0092] Appendix Figure 7 For the appendix Figure 6 A sectional view;

[0093] Appendix Figure 8 For the appendix Figure 7 Enlarged view at point B in the middle;

[0094] Appendix Figure 9 This is a second partial structural schematic diagram of the dual-band physiotherapy device in an embodiment of the present invention;

[0095] Appendix Figure 10 For the appendix Figure 9 Enlarged view of point C in the middle.

[0096] In the attached diagrams above:

[0097] 1. Protective netting; 2. Back cover;

[0098] 3. Heating plate; 301. Heat insulation cover; 301a. First cover plate; 301b. Second cover plate; 302. Heating plate; 303. Radiant plate;

[0099] 304. First screw; 305. First nut; 306. Washer; 307. First limiting part; 308. Second limiting part;

[0100] 4. First heat insulation plate; 5. Heat reflector plate; 6. Second heat insulation plate; 601. Light-transmitting hole; 7. PCB circuit board; 8. Indicator light; 9. Second screw; 10. Insert sleeve; 11. Third screw; 12. Support sleeve; 13. Fourth screw. Detailed Implementation

[0101] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0102] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0103] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0104] See appendix Figure 1 - Appendix Figure 10 A dual-band physiotherapy device includes a protective net 1, a rear shell 2 fixedly disposed on the protective net 1, and a heating plate 3 fixedly disposed on the inner side of the rear shell 2. The heating plate 3 includes: Radiation plate 303 is positioned facing the protective net 1 and is used to generate a first band and a second band; A heating plate 302 is fixedly disposed on the surface of the radiation plate 303 away from the protective net 1, and is used to heat the radiation plate 303; The heat insulation cover 301, together with the radiation plate 303, forms a sealed heat insulation space, and the heating plate 302 is located within the heat insulation space; The heating plate 302 and the radiant plate 303 are coaxially arranged; the outer peripheral surface of the radiant plate 303 is attached to the heat insulation cover 301 to form the heat insulation space; the outer peripheral surface of the heating plate 302 is spaced apart from the heat insulation cover 301.

[0105] In the thickness direction of the radiant plate 303, the orthographic projection of the central region of the heating plate 302 coincides with that of the central region of the radiant plate 303. The heating plate 302 and the radiant plate 303 are understood as cylindrical structures, and this shape is preferred. This embodiment will be described accordingly.

[0106] The protective net 1 can be assembled with the rear shell 2 by means of threaded connection or snap-on connection to form a protective space for protecting the heating plate 3. The method of fixing the heating plate 3 to the protective space is not limited here.

[0107] The protective net 1, heating plate 302 and radiation plate 303 can all be disc-shaped and the three are coaxially arranged. The diameter of heating plate 302 is smaller than the diameter of radiation plate 303.

[0108] The rear shell 2 may have mounting holes 203 to facilitate the installation of the electromagnetic wave therapy device on the bracket. The rear shell 2 may also have heat dissipation holes 201.

[0109] The heat insulation cover 301 and the radiant plate 303 enclose a heat insulation space, making the heating plate 3 a closed structure. The heat insulation cover 301 can be a stainless steel heat insulation cover.

[0110] When the electromagnetic wave therapy device is working, the heating plate 302 converts electrical energy into heat energy. Since the heating plate 302 is fixed to the inner surface of the radiation plate 303 (the surface of the radiation plate 303 away from the protective net 1), the heat generated by the heating plate 302 can be concentrated on the radiation plate 303. After receiving the heat transferred from the heating plate 302, the radiation plate 303 simultaneously radiates a first band (described below as near-infrared) and a second band (described below as far-infrared or mid-far-infrared) towards the protective net 1. This dual-band infrared light passes through the protective net 1 and then directly irradiates the part of the human body that needs physiotherapy. The heating plate 302 can be electrically connected to the PCB circuit board 7 described below.

[0111] The heating plate 302 and the radiation plate 303 are both disc-shaped and coaxially arranged. In this structure, the heat is concentrated in the periphery of the heating plate 302, and the central area of ​​the radiation plate 303 is sufficiently heated because it is in close contact with the heating plate 302. This results in better temperature uniformity of the heating plate 302, which in turn makes the radiation plate 303 heat up more evenly, thus ensuring the therapeutic effect.

[0112] The diameter of the heating plate 302 can be considered to be smaller than that of the radiation plate 303. This reduces the direct heat conduction from the heating plate 302 to the outer periphery of the radiation plate 303, thereby reducing the heat transfer from the outer periphery of the radiation plate 303 to the heat insulation cover 301 in contact with it. This allows more heat to act on the middle part of the radiation plate 303 and the effective radiation area through radiation and air conduction, thus meeting the design requirements of directional radiation of the radiation plate 303 towards the protective net 1. This allows the heat to be more concentratedly converted into directional dual-band infrared rays, thereby improving the targeting and energy utilization efficiency of the physiotherapy.

[0113] In this embodiment, a heating plate 302 is used as the heating element. Compared with microcrystalline fiber cloth heating lamps, the heating plate 302 has better insulation and high temperature resistance, which can reduce the safety hazards of long-term high-temperature operation of the heating element and extend the service life of the heating element. Moreover, the radiant plate 303 and the heat insulation cover 301 form a closed heating plate 3, so that the heat generated by the heating plate 302 is mainly radiated to the human body through the radiant plate 303 facing the protective net 1, which reduces the heat loss through the rear shell 2 (mainly the heat dissipation holes 201 on the rear shell 2), improves the heat utilization efficiency, and the heat insulation cover 301 can further enhance the heat insulation effect.

[0114] The heating plate 302 and the radiant plate 303 remain relatively fixed. For example, multiple retaining plates 14 are distributed circumferentially on the outer side of the radiant plate 303, while multiple retaining slots 3021 that mate with the retaining plates 14 are distributed circumferentially on the outer side of the heating plate 302. Through the engagement of each retaining plate 14 with each retaining slot 3021, a stable connection between the heating plate 302 and the radiant plate 303 can be achieved, preventing relative rotation between the two during use and ensuring that the heating plate 302 is always stably positioned in a preset position on the inner surface of the radiant plate 303, thus guaranteeing the stability and uniformity of heat transfer. At the same time, this retaining structure eliminates the need for additional complex connecting parts, simplifying the assembly process and improving production efficiency.

[0115] It should be noted that the radiating plate 303 can generate only the near-infrared band or the far-infrared band, which is a conventional conversion scheme.

[0116] In this embodiment, the heating plate 302 is a mica heating plate or an epoxy resin heating plate, which can achieve uniform and stable heat output, provide a stable energy base for the radiation plate 303, and ensure that the radiation plate 303 can continuously and stably emit electromagnetic waves. The radiating plate 303 comprises a galvanized sheet and near-infrared and mid-to-far-infrared coatings formed on the outer surface of the galvanized sheet, generating a first and a second wavelength band through these two coatings. Based on this, the good structural stability and thermal conductivity of the galvanized sheet can be utilized to receive heat transferred from the heating plate 302, and the near-infrared and far-infrared coatings on the outer surface of the galvanized sheet allow the radiating plate 303 to simultaneously generate near-infrared and mid-to-far-infrared wavelength bands. The near-infrared and mid-to-far-infrared coatings can be coatings formed by spraying with a graphene-containing material. The distribution of the near-infrared and mid-to-far-infrared coatings on the outer surface of the galvanized sheet is not limited. In this application, the material of the radiating plate 303 is not limited to galvanized sheet; other materials that can be coated and then emit infrared radiation can also be used; the coating material is not limited to graphene.

[0117] It should be noted that the wavelength of TDP electromagnetic wave therapy devices is usually distributed between 2.0-25.0μm. Combining multiple standards for analysis (there is currently no clear standard for wave band division), and referring to the consensus and practice of the medical industry, the infrared wave band is first divided into: near-infrared wave band (0.75-3.0μm), mid-infrared wave band (3.0-8.0μm), and far-infrared wave band (8.0-15μm). Currently, among TDP electromagnetic wave therapy devices, only the far-infrared band (8.0-15μm) has a large concentration of radiation intensity, accounting for approximately 60%-70% of the total. The near-infrared (0.75-3.0μm) and mid-infrared (3.0-8.0μm) bands have significantly lower concentrations, with the near-infrared band (0.75-3.0μm) accounting for only about 5%-10% and the mid-infrared band (3.0-8.0μm) only about 25%-30%. This difference in concentration results in a relatively low near-infrared radiation intensity, leading to shallow penetration of the electromagnetic waves into human tissues. This prevents the waves from effectively reaching subcutaneous tissues and even muscle layers, thus weakening their impact on deep tissue repair and cell metabolism. Recent studies have found that narrow-spectrum near-infrared radiation of specific wavelengths (such as 0.81μm and 0.98μm) exhibits outstanding performance in nerve repair and anti-inflammation, and clinical standards are under development and unification. In practical clinical applications, it is often necessary to combine near-infrared (0.75-3.0μm), mid-infrared (3.0-8.0μm), and far-infrared (8.0-25μm) bands. In particular, it is crucial to increase the proportion of radiation intensity in the near-infrared band (0.75-3.0μm) to achieve deeper penetration into human tissues (50-80mm), resulting in better clinical therapeutic effects and enabling precise, layered treatment of human diseases.

[0118] Optionally, near-infrared and mid-to-far-infrared coatings are superimposed or partially overlapped on the outer surface of the galvanized sheet. When the radiant plate 303 is heated to a certain degree, it can simultaneously generate near-infrared and mid-to-far-infrared wavelengths, or alternately radiate near-infrared and mid-to-far-infrared rays with temperature changes, or emit only near-infrared or mid-to-far-infrared rays through temperature selection. By combining non-metallic or metallic substrates with coating technology, the radiant plate 303 can generate two dual-peak wavelengths: a near-infrared wavelength (0.75-3.0 μm) and a mid-to-far-infrared wavelength (3.0-25 μm), with the near-infrared wavelength accounting for 50%-60% of the radiation intensity and the mid-to-far-infrared wavelength accounting for 40%-50%. In actual clinical applications, combining these two concentrated wavelengths can achieve better clinical therapeutic effects and enable precise stratified treatment.

[0119] Epoxy resin heating plates are made by high-temperature pressing of alloy heating strips and glass fiber reinforced epoxy resin boards, offering advantages such as rapid and uniform heating, and high thermal efficiency. Mica heating plates fully utilize the high-temperature resistance and electrical insulation properties of mica material, resulting in high thermal efficiency and energy savings. They also reduce safety hazards caused by decreased insulation performance of heating elements under long-term high-temperature operation.

[0120] The heating plate 302 can also be a ceramic heating plate. Preferably, the heating plate 302 is a non-metallic heating plate.

[0121] In this embodiment, it also includes a first heat insulation plate 4 and a heat reflector plate 5, both of which are fixedly disposed in the heat insulation space and both face the protective net 1; The first heat insulation plate 4 is fixedly disposed on the surface of the heat reflector plate 5 away from the protective net 1; At least one of the first heat insulation plate 4 and the heat reflector plate 5 is sealed and fitted to the wall of the heat insulation cover 301, preferably both are fitted to the wall of the heat insulation cover 301.

[0122] The heat reflector 5 can reflect the heat emitted by the heating plate 302 in the rear (the direction away from the radiation plate 303) back into the heating plate 3 (it can be reflected in the direction of the heating plate 302), reducing the heat loss to the rear and concentrating more heat on the radiation plate 303, thereby improving the heat utilization efficiency.

[0123] The first heat insulation plate 4 can block the residual heat that may be transmitted to the rear after being reflected by the heat reflector plate 5, and prevent this part of the heat from being conducted to the external environment through the rear shell 2. This further improves the heat utilization efficiency and prevents the rear shell 2 from getting too hot, thus eliminating related safety hazards.

[0124] The first heat insulation board can be a mica heat insulation board, and the heat reflector plate 5 can be a galvanized sheet. The excellent heat insulation performance of the mica heat insulation board combined with the good reflective properties of the galvanized sheet can ensure the heat insulation and heat recovery effect. Through the synergistic cooperation, the heating plate 3, which can be regarded as a closed structure, further ensures the efficient and stable operation of the electromagnetic wave therapy device in this embodiment, especially in terms of the stable generation of the first and second wave bands by the radiation plate 303 and the reduction of the risk of failure of the electromagnetic wave therapy device.

[0125] Preferably, the thickness of the first heat insulation plate 4 is 1.5mm-1.7mm. This thickness ensures good heat insulation and effectively blocks residual heat that may be transmitted to the rear after being reflected by the heat reflector plate 5. It also avoids increasing the weight and volume of the electromagnetic wave therapy device due to excessive thickness, thus fitting the compact design of the TDP electromagnetic wave therapy device.

[0126] Preferably, the thickness of the heat reflector 5 is 0.4mm-0.5mm. While ensuring sufficient structural strength to stabilize the heat emitted by the heating plate 302 and reduce heat loss, it can reduce the amount of material used and weight. The thinner thickness can fit the assembly space better and form an efficient heat insulation and reflection combination with the first heat insulation plate 4, further enhancing the heat utilization efficiency and ensuring the heat concentration of the closed heating plate 3.

[0127] Preferably, the distance between the heat reflector 5 and the heating plate 302 is 8mm-12mm. This provides a suitable space for reflecting the heat emitted by the heating plate 302, allowing the heat reflector 5 to effectively capture and reflect the heat radiated by the heating plate 302. It also avoids the problem of excessive heat concentration between the heat reflector 5 and the heating plate 302 due to an excessively small distance, which would affect the heat dissipation stability of the heating plate 302. This distance is not too large, which can avoid the problems of reduced reflection efficiency and heat waste.

[0128] In this embodiment, a first screw 304 extending along the thickness direction of the radiant plate 303 is fixedly provided on the side surface of the radiant plate 303 near the heating plate 302. The first screw 304 passes through the heating plate 302, the heat reflector plate 5 and the first heat insulation plate 4 in sequence. The heating plate 302 and the heat reflector 5 are provided with a first limiting part 307 that is threadedly connected to the first screw 304, and the first heat insulation plate 4 is provided with a second limiting part 308 that is threadedly connected to the first screw 304 on the side away from the heating plate 302. The first limiting part 307 and the second limiting part 308 cooperate to position the first heat insulation plate 4 and the heat reflector plate 5.

[0129] For example, the heating plate 302 may be provided with a through hole through which the first screw 304 passes.

[0130] For example, the first limiting part 307 is threadedly connected to the first screw 304. The specific structure of the first limiting part 307 is not limited, such as it can be a nut.

[0131] The cooperation of the first limiting part 307 and the second limiting part 308 ensures that the heat reflector 5, the first heat insulation plate 4, and the heating plate 302 remain relatively fixed. The threaded connection of the first limiting part 307 and the second limiting part 308 facilitates assembly and adjustment. The distance between the heat reflector 5 (and the first heat insulation plate 4) and the heating plate 302 can be adjusted by rotating and adjusting the positions of the first limiting part 307 and the second limiting part 308 on the first screw 304, thereby providing a suitable reflection space for the heat emitted backward by the heating plate 302.

[0132] In this embodiment, the first screw 304 passes through the end of the heat insulation cover 301 away from the protective net 1. On the side of this end away from the protective net 1, a gasket 306 and a first nut 305 threadedly connected to the first screw 304 are sequentially provided. The gasket 306 is sleeved on the first screw 304 and tightly attached to the heat insulation cover 301.

[0133] The gasket 306 is pressed against the heat insulation cover 301 by the first nut 305, thereby firmly connecting the radiation plate 303, the heating plate 302 and the heat insulation cover 301 into one unit by the first screw 304. This also ensures the sealing and structural strength of the heating plate 3. The sealing can prevent heat from being lost from gaps (such as the gap between the heat insulation cover 301 and the gasket 306), further improving the heat utilization efficiency.

[0134] The gasket 306 can be seen as increasing the effective area of ​​the first nut 305 on the heat insulation cover 301, preventing the first nut 305 from directly pressing the heat insulation cover 301 and causing excessive local pressure on the heat insulation cover 301, thus protecting the heat insulation cover 301.

[0135] In this embodiment, a second heat insulation plate 6, a PCB circuit board 7, and an indicator light 8 are also disposed on the inner side of the rear shell 2. The second heat insulation plate 6 is fixedly disposed at the bottom end of the heat insulation cover 301 (i.e. the end away from the protective net 1) on the side away from the radiation plate 303; The PCB circuit board 7 is fixedly disposed on the side of the second heat insulation plate 6 away from the radiation plate 303; The indicator light 8 is fixedly mounted and electrically connected to the PCB circuit board 7.

[0136] The second heat insulation plate 6 can block the small amount of heat transmitted to the rear by the heat insulation cover 301, so as to prevent this heat from affecting the electronic components on the PCB circuit board 7 and ensure the stable operation and service life of the circuit system.

[0137] Indicator light 8 visually displays the working status of the electromagnetic wave therapy device, allowing users to easily understand whether the device is operating and improving its ease of use. For example, a blue light indicates normal operation, while a red light indicates a malfunction. The interaction between indicator light 8 and PCB circuit board 7 is existing and will not be described in detail here.

[0138] Preferably, the PCB circuit board 7 is equipped with a thermal fuse. When the electromagnetic wave therapy device malfunctions and causes an abnormal temperature rise, the thermal fuse can melt in time to cut off the circuit and prevent the heating plate 302 and other components from causing safety hazards due to continuous high temperature.

[0139] In this embodiment, the second heat insulation plate 6 is spaced apart from the PCB circuit board 7, thereby providing a space for the indicator light 8; The indicator light 8 is fixedly mounted on the surface of the PCB circuit board 7 near the second heat insulation plate 6; The second heat insulation plate 6 has a light-transmitting hole 601 corresponding to the indicator light 8; the orthographic projection of the indicator light 8 on the PCB circuit board 7 is covered by the orthographic projection of the light-transmitting hole 601 on the PCB circuit board 7.

[0140] With the help of the light-transmitting hole 601, the light from the indicator light 8 can be transmitted in the direction of the protective net 1, making it easy for the user to observe the status of the indicator light 8 from outside the device to understand the working status of the electromagnetic wave therapy device. The size of the light-transmitting hole 601 can be adjusted according to actual needs.

[0141] The second heat insulation plate 6 can be a transparent epoxy resin heat insulation plate, which can effectively block the heat generated by the heating plate 3 from being transferred to the PCB circuit board 7 due to its good heat insulation performance. In addition, due to its transparency, it can conduct the light of the indicator light 8 more smoothly, ensuring that the user can clearly observe the status of the indicator light 8 to understand the working status of the electromagnetic wave therapy device.

[0142] Preferably, a wire tube 15 is fixed to the side of the heating plate 302 facing the heat reflector plate 5. Part of the wire tube 15 is located on the side of the heat insulation cover 301 near the light-transmitting hole 601. A wire electrically connected to the heating plate 302 is threaded through the wire tube 15, and the wire passes through the light-transmitting hole 601. The PCB circuit board 7 and the heating plate 302 are electrically connected by the wire. In addition, the wire tube 15 can provide stable protection and restraint for the wire threaded therein and electrically connected to the heating plate 302, preventing the wire from shifting, wearing, or making unnecessary contact with other components due to vibration, heat, or other factors inside the device. This ensures the structural integrity of the wire and the stability of the electrical connection, while reducing safety hazards during the use of the electromagnetic wave therapy device.

[0143] In this embodiment, the bottom end of the heat insulation cover 301, away from the radiation plate 303, is provided with at least a portion of the second screw 9, the insert 10, and the third screw 11; The second screw 9 is fixedly mounted on the heat insulation cover 301; The insert 10 is threadedly connected to the second screw 9 and the third screw 11 respectively, and the insert 10 abuts against the surface of the second heat insulation plate 6 away from the PCB circuit board 7; The third screw 11 passes through the second heat insulation plate 6 and the PCB circuit board 7, and a portion of the third screw 11 presses against the surface of the PCB circuit board 7 away from the second heat insulation plate 6; A support cylinder 12 is sleeved on the third screw 11. The support cylinder 12 is located between the second heat insulation plate 6 and the PCB circuit board 7 and is in close contact with both.

[0144] The head of the second screw 9 can be pressed against the bottom end of the heat insulation cover 301 near the side surface of the radiation plate 303 by a gasket.

[0145] The second screw 9 is connected to the heat insulation cover 301, the insert 10 is connected to the second screw 9, the third screw 11 is connected to the insert 10, and the support cylinder 12 is connected to the third screw 11. The support cylinder 12 is located between the second heat insulation plate 6 and the PCB circuit board 7 and is in close contact with both. A portion of the third screw 11 presses against the surface of the PCB circuit board 7 away from the second heat insulation plate 6. Based on these arrangements, the heat insulation cover 301, the second heat insulation plate 6, and the PCB circuit board 7 form a whole, thereby fixing the second heat insulation plate 6 and the PCB circuit board 7.

[0146] The support cylinder 12 is located between the second heat insulation plate 6 and the PCB circuit board 7. The length of the support cylinder 12 determines the distance between the second heat insulation plate 6 and the PCB circuit board 7, which can provide a space for the indicator light 8.

[0147] Part of the third screw 11 presses against the surface of the PCB circuit board 7 away from the second heat insulation plate 6, which can be referred to as the description that the head of the second screw 9 presses against the bottom end of the heat insulation cover 301 near the surface of the radiation plate 303.

[0148] The second screw 9, the insert 10, the third screw 11, and the support cylinder 12 can be multiple and in the same quantity, and the corresponding gaskets can also be the same.

[0149] In this embodiment, a fourth screw 13 is also threaded to the rear housing 2, and the fourth screw 13 is fixed relative to the PCB circuit board 7 by a second nut.

[0150] The rear housing 2 may be provided with screw holes 202 corresponding to the fourth screw 13.

[0151] The shank of the fourth screw 13 can be threaded into the second nut. At this time, the head of the fourth screw 13 can engage with the second nut to clamp the PCB circuit board 7, thus fixing the PCB circuit board 7 to the inside of the rear shell 2. Since the heat insulation cover 301, the second heat insulation plate 6, and the PCB circuit board 7 form a single unit, these structures can be installed using only the fourth screw 13 and the second nut, eliminating the need for individual connections between these structures and the rear shell 2, simplifying the disassembly and installation process. When the radiant plate 303, the heating plate 302, and the heat insulation cover 301 are securely connected as a single unit, the installation of the radiant plate 303 and the heating plate 302 is also achieved simultaneously.

[0152] In this embodiment, the heat insulation cover 301 has a conical structure; The heat insulation cover 301 includes a first cover plate 301a parallel to the protective net 1 and a second cover plate 301b surrounding the first cover plate 301a; The first cover plate 301a is connected to the second cover plate 301b; The first cover plate 301a, the second cover plate 301b and the radiating plate 303 enclose the heat insulation space.

[0153] The heat shield 301 is a conical heat shield, comprising a first cover plate 301a parallel to the protective net 1 and a second cover plate 301b surrounding the first cover plate 301a. When the indicator light 8 is working, the light emitted can be transmitted along the inclined surface of the second cover plate 301b towards the protective net 1. The inclined surface guides the light to be more concentrated and diffused towards the protective net 1, reducing scattering and loss of light inside the device. This allows the user to more clearly observe the status of the indicator light 8 from the side of the protective net 1, providing a direct understanding of the electromagnetic wave therapy device's operation. It is understood that the outer peripheral surface of the radiation plate 303 is attached to the second cover plate 301b. The above description of the corresponding heat shield 301 can be found in the appendix. Figure 1One corresponds to the first cover plate 301a or the second cover plate 301b.

[0154] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dual-band physiotherapy device, characterized in that: It includes a protective net (1), a rear shell (2) fixedly disposed on the protective net (1), and a heating plate (3) fixedly disposed on the inner side of the rear shell (2). The heating plate (3) includes: A radiating plate (303) is positioned facing the protective net (1) and is used to generate a first band and a second band; A heating plate (302) is fixedly disposed on the side surface of the radiant plate (303) away from the protective net (1) for heating the radiant plate (303). A heat insulation cover (301) and the radiant plate (303) enclose a sealed heat insulation space, and the heating plate (302) is located within the heat insulation space; The heating plate (302) and the radiant plate (303) are coaxially arranged; the outer peripheral surface of the radiant plate (303) is attached to the heat insulation cover (301) to form the heat insulation space; the outer peripheral surface of the heating plate (302) and the heat insulation cover (301) are spaced apart.

2. The dual-band physiotherapy device according to claim 1, characterized in that: The heating plate (302) is a non-metallic heating plate; The radiant plate (303) includes a galvanized plate and a near-infrared coating and a far-infrared coating formed on the outer surface of the galvanized plate.

3. The dual-band physiotherapy device according to claim 1, characterized in that: It also includes a first heat insulation plate (4) and a heat reflector plate (5) that are both fixedly installed in the heat insulation space and face the protective net (1). The first heat insulation plate (4) is fixedly disposed on the side surface of the heat reflector plate (5) away from the protective net (1); At least one of the first heat insulation plate (4) and the heat reflector plate (5) is sealed and fitted to the wall of the heat insulation cover (301).

4. A dual-band physiotherapy device according to claim 3, characterized in that: A first screw (304) extending along the thickness direction of the radiant plate (303) is fixedly provided on the side surface of the radiant plate (303) near the heating plate (302). The first screw (304) passes through the heating plate (302), the heat reflector plate (5) and the first heat insulation plate (4) in sequence. The heating plate (302) and the heat reflector plate (5) are provided with a first limiting part (307) threadedly connected to the first screw (304), and the first heat insulation plate (4) is provided with a second limiting part (308) threadedly connected to the first screw (304) on the side away from the heating plate (302). The first limiting part (307) and the second limiting part (308) cooperate to position the first heat insulation plate (4) and the heat reflector plate (5).

5. A dual-band physiotherapy device according to claim 4, characterized in that: The first screw (304) passes through the end of the heat insulation cover (301) away from the protective net (1). On the side of the end away from the protective net (1), a gasket (306) and a first nut (305) threaded to the first screw (304) are sequentially provided. The gasket (306) is sleeved on the first screw (304) and closely attached to the heat insulation cover (301).

6. A dual-band physiotherapy device according to any one of claims 1-5, characterized in that: It also includes a second heat insulation plate (6), a PCB circuit board (7) and an indicator light (8) all disposed on the inner side of the rear shell (2); The second heat insulation plate (6) is fixedly disposed at the bottom end of the heat insulation cover (301) on the side away from the radiation plate (303); The PCB circuit board (7) is fixedly disposed on the side of the second heat insulation plate (6) away from the radiation plate (303); The indicator light (8) is fixedly mounted on and electrically connected to the PCB circuit board (7).

7. A dual-band physiotherapy device according to claim 6, characterized in that: The second heat insulation plate (6) is spaced apart from the PCB circuit board (7); The indicator light (8) is fixedly mounted on the side surface of the PCB circuit board (7) near the second heat insulation plate (6); The second heat insulation plate (6) has a light-transmitting hole (601) corresponding to the indicator light (8); the orthographic projection of the indicator light (8) on the PCB circuit board (7) is covered by the orthographic projection of the light-transmitting hole (601) on the PCB circuit board (7).

8. A dual-band physiotherapy device according to claim 7, characterized in that: The bottom end of the heat shield (301) away from the radiant plate (303) is provided with at least a portion of the second screw (9), a plug (10) and a third screw (11). The second screw (9) is fixedly mounted on the heat insulation cover (301); The insert (10) is threadedly connected to the second screw (9) and the third screw (11) respectively, and the insert (10) abuts against the side surface of the second heat insulation plate (6) away from the PCB circuit board (7); The third screw (11) penetrates the second heat insulation plate (6) and the PCB circuit board (7), and a portion of the third screw (11) presses against the side surface of the PCB circuit board (7) away from the second heat insulation plate (6); A support cylinder (12) is sleeved on the third screw (11), and the support cylinder (12) is located between the second heat insulation plate (6) and the PCB circuit board (7) and is in close contact with both.

9. A dual-band physiotherapy device according to claim 8, characterized in that: It also includes a fourth screw (13) threaded to the rear housing (2), the fourth screw (13) being fixed relative to the PCB circuit board (7) by a second nut.

10. A dual-band physiotherapy device according to claim 7, characterized in that: The heat insulation cover (301) has a conical structure; The heat insulation cover (301) includes a first cover plate (301a) parallel to the protective net (1) and a second cover plate (301b) surrounding the first cover plate (301a). The first cover plate (301a) is connected to the second cover plate (301b); The first cover plate (301a), the second cover plate (301b), and the radiating plate (303) enclose the heat insulation space.

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