Knee joint therapeutic apparatus with double-NTC temperature control function

Abstract

The utility model discloses a knee joint therapeutic apparatus with a double NTC temperature control function, the knee joint therapeutic apparatus comprises a power supply assembly, a control assembly and a patient connection assembly which are electrically connected, and the power supply assembly is electrically connected with the control assembly and the patient connection assembly and supplies power to the control assembly and the patient connection assembly; a single chip microcomputer control module, a heating module, a temperature control module and an overtemperature control module are arranged in the control assembly; a heating layer, a first thermosensitive temperature sensor and a second thermosensitive temperature sensor are arranged in the patient connecting assembly, and the first thermosensitive temperature sensor and the second thermosensitive temperature sensor are arranged on the heating layer. According to the scheme, uniform and stable heating, small temperature error, good user experience and overtemperature protection design of the knee joint therapeutic instrument can be realized, the problems of a traditional temperature fuse are effectively solved, lower fusing temperature, lower fusing error temperature and very small volume can be realized, the appearance of the product is hardly influenced, and the whole set of scheme is low in cost and easy to popularize. Mass production is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical care equipment, and in particular to a knee joint therapeutic device with a double NTC temperature control function. Background Art

[0002] Hot compress therapy has a long history. There were many hot compress methods in ancient times, such as medicine compress, soup compress, wine compress, salt compress, etc. The characteristic of hot compress is that it does not require medication. It is a method of treating diseases through heat stimulation on specific parts of the patient. Hot compress therapy is widely used in various clinical diseases, especially for soft tissue injury diseases. It is also widely used in various auxiliary treatments, such as far-infrared baking lamp therapy device assisted acupuncture treatment, low-temperature heating assisted medium and low frequency pulse treatment, etc.

[0003] However, cases of burns caused by hot compresses from heating products on the market are also very common. Unlike hot water burns, low-temperature burns are often more serious. Because of the long contact time with the skin, the burn wounds are deeper and the recovery is much slower. The reason for low-temperature burns is often that such products cannot accurately control the temperature or the heating is uneven, which poses a great safety hazard.

[0004] In view of this, Table 24 of the general standard for medical devices GB 9706.1-2020 clarifies the maximum allowable temperature and contact time requirements for the applied parts of ME equipment that contact the skin. For materials such as molded materials, plastics, rubber, and wood, when the heating temperature is ≤43°C, the allowable heating time is ≥10min; when the heating temperature is in the range of 43°C~48°C, the allowable heating time is 1min~10min; when the heating temperature is ≥60°C, the allowable heating time is <1min.

[0005] Most of the pulse therapy knee therapy devices on the current market do not have a heating function. Due to the strictness of the general standards for medical devices, the main technical difficulty lies in the uniformity of temperature control and the handling of over-temperature under a single fault. The traditional heating layer mainly uses heating wires for heating. This type of heating layer has the disadvantages of low energy utilization, uneven heating, and easy oxidation at high temperatures. It is difficult to achieve precise temperature control. In addition, under a single fault state, according to the description above, it is best to disconnect the heating source before the heating temperature reaches 60°C, and the heating time should be controlled within 1 minute. This requires that the temperature collection of the heating layer be as accurate as possible. An uneven heating layer can easily lead to dangerous conditions. In addition, due to GB Clause 15.4.2.1 of 9706.1-2020 requires that if a failure of the thermostat will cause the dangerous situation described in 13.1, an additional non-self-resetting thermal circuit breaker should be provided. The difficulty of this clause lies in the fact that this thermal circuit breaker needs to be non-self-resetting. The traditional non-self-resetting thermal circuit breaker is a temperature fuse. The disadvantages of this type of fuse are very obvious. First, the melting temperature is high. The melting temperature of commonly used non-self-resetting fuses is above 80°C, which cannot meet the disconnection requirements of this product within 60°C. Second, the melting error is large. It is normal for the nominal 80°C to melt and the 85°C to melt, which makes the disconnection operation uncontrollable. Third, the product is disposable. Once it melts, it can only be replaced or returned to the factory for repair. Some extreme users will even continue to use the temperature fuse after short-circuiting it directly, which increases the probability of danger. Fourth, the size is large. A temperature fuse is attached to the heating layer. Due to its size, the appearance is not very good. Even if it is covered with cloth, an obvious bulge will be formed, which greatly affects the appearance and user experience.

[0006] In view of this, how to solve the above problems existing in the prior art has become the subject to be studied and solved by the present utility model. Utility Model Content

[0007] The purpose of the utility model is to provide a knee joint therapeutic device with a dual NTC temperature control function, which is used to solve at least one of the following technical problems:

[0008] 1. How to achieve precise temperature control on low-frequency knee joint therapeutic instrument products;

[0009] 2. How to design a more accurate and miniaturized over-temperature circuit breaker mechanism for low-frequency knee joint therapeutic instrument products;

[0010] 3. How to comply with the heating and over-temperature requirements of GB 9706.1-2020.

[0011] To achieve the above-mentioned purpose, the utility model proposes a knee joint therapeutic device with a dual NTC temperature control function, the knee joint therapeutic device comprising an electrically connected power supply component, a control component, and a patient connection component;

[0012] The power supply component is electrically connected to the control component and the patient connection component and supplies power to the control component and the patient connection component;

[0013] The control component comprises a single chip control module, a heating module, a temperature control module and an over-temperature control module;

[0014] The patient connection component comprises a heating layer, a first thermistor temperature sensor, and a second thermistor temperature sensor, wherein the first thermistor temperature sensor and the second thermistor temperature sensor are arranged on the heating layer;

[0015] The single-chip control module, the heating module, and the heating layer are electrically connected, and the single-chip control module controls the heating module to provide energy for heating the heating layer;

[0016] The single-chip control module, the temperature control module, and the first thermistor temperature sensor are electrically connected, and the first thermistor temperature sensor provides a signal to the temperature control module and then feeds back to the single-chip control module for temperature control;

[0017] The power supply component, the over-temperature control module, and the second thermistor temperature sensor are electrically connected, and the second thermistor temperature sensor provides a signal to the over-temperature control module and then feeds back to the power supply component for over-temperature protection.

[0018] The relevant contents of this utility model are explained as follows:

[0019] 1. In the above technical scheme of the utility model, the power supply component, the control component and the patient connection component in the above knee joint therapeutic device are specially designed to meet the temperature control and over-temperature protection; for temperature control, when the user uses it, the power supply component supplies power to the control component, and when the user turns on the heating, the single-chip control module controls the heating module to work, and the heating module provides energy to the heating layer. At this time, the heating layer will continue to heat up, and the resistance value of the first thermistor temperature sensor will continue to decrease. When the temperature control module detects that the temperature of the heating layer has reached the set temperature, it will feedback to the single-chip control module, and the single-chip control module will control the heating module to disconnect. At this time, the heating layer begins to cool down. When the temperature of the heating layer is lower than the set temperature, the single-chip control module will control the heating module to work through the program, and it will continue to cycle like this. The temperature will fluctuate around the set point. At this time, the on-off time is controlled at the ms level, and the peak-to-peak value of the temperature fluctuation will be very small, which realizes constant temperature control, controls the temperature within the set temperature and controls the running time of each operation , it can well meet the requirements of the current standard for heating time; for over-temperature protection, it is considered that if there is a single fault, when the single-chip control module cannot control the heating module, the heating layer will continue to heat up, and when it reaches the over-temperature alarm point, the second thermistor temperature sensor will feed back the temperature to the over-temperature control module. This module is a pure hardware module and is not affected by the single-chip control module. Therefore, the over-temperature control module can provide a power-off signal to the power supply component very stably. The power supply component will cut off the power supply of the single-chip control module. The single-chip control module has no output and shuts down, thereby turning off the heating module. This process cannot be restored automatically and must be restored through human intervention. This effectively avoids burns to the human body caused by continuous high temperature. Due to the high-precision characteristics of the second thermistor temperature sensor, the over-temperature point can be judged very accurately. During maintenance, there is no need to replace the second thermistor temperature sensor. Only the damaged module can be checked, which reduces the maintenance cost. This over-temperature protection design scheme can accurately set the over-temperature point to meet the requirements of the current standard for over-temperature. The above solution can achieve uniform and stable heating of the knee joint therapeutic device, small temperature error, good user experience, and over-temperature protection design, which effectively solves the problems of traditional temperature fuses, can achieve lower fusing temperature, smaller fusing error temperature, and very small volume, and has almost no effect on the product appearance. In addition, the whole solution is low-cost and suitable for mass production.

[0020] 2. In the technical solution of the first aspect above, the heating layer includes a carbon nanotube layer and / or a graphene layer. The heating layer adopts planar heating and is heated evenly. Carbon nanotubes or graphene are used as heating materials, and the heat conversion efficiency is very high, which saves energy. The temperature is measured using a thermistor. The thermistor itself has a relatively high temperature measurement accuracy. Combined with the planar heating carbon nanotubes or graphene, it can avoid temperature misjudgment caused by uneven heating, and solve the problem of large error between actual temperature and set temperature from the root. Since the carbon nanotubes or graphene heat up quickly when running at full power, when the single-chip control module cannot control the heating module, the heating layer will quickly heat up to the over-temperature condition, thereby quickly triggering a power outage, thereby ensuring that the time from the set temperature to the over-temperature does not exceed the existing standard requirements.

[0021] 3. In the technical solution of the first aspect above, the power supply component includes a network power supply part and a power conversion part, the network power supply part includes a network power conversion module, the power conversion part includes a charging module, a battery module, and a power step-down module, the network power conversion module, the charging module, the battery module, and the power step-down module are electrically connected, and the power step-down module is electrically connected to the single-chip control module and the over-temperature control module respectively. The network power conversion module converts 220V AC mains power into DC power, and charges the battery module through the charging module. When the user uses it, the battery module will continuously output DC power, which is stepped down through the power control module and powered to the single-chip control module, thereby getting rid of the limitation of the power cord, so that the user can be free from the restrictions of the use environment and can perform medical and health care anytime and anywhere.

[0022] 4. In the technical solution of the first aspect mentioned above, the single-chip microcomputer control module includes a single-chip microcomputer chip, the lead pins of the single-chip microcomputer chip are connected to the power supply step-down module, and the lead pins of the single-chip microcomputer chip are connected to the heating module and the temperature control module, so as to realize orderly and reliable implementation of related controls.

[0023] 5. In the technical solution of the first aspect above, the single-chip control chip is also connected to a display module to display relevant data, temperature, over-temperature conditions, etc. in the display module, so that the user can know the usage of the therapeutic device.

[0024] 6. In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] 7. In the present utility model, the terms "center", "upper", "lower", "bottom", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional assembly relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; if the manual pressure relief valve is turned upside down or placed horizontally, the corresponding orientation should also be adjusted accordingly.

[0026] 8. In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] 9. In addition, the term "and / or" in this application means three parallel solutions. Taking "A and / or B" as an example, it includes Solution A, Solution B, or a solution in which both A and B are satisfied.

[0028] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0029] 1. The utility model can control the temperature within the set temperature and control the running time of each operation, which can well meet the requirements of the current standard on heating time. The peak-to-peak value of temperature fluctuation will be very small, realizing constant temperature control.

[0030] 2. The utility model can effectively avoid burns to the human body caused by continuous high temperature. Due to the high-precision characteristics of the second thermistor, the over-temperature point can be judged very accurately. During maintenance, there is no need to replace the second thermistor, and only the damaged module can be checked, which reduces the maintenance cost. This over-temperature protection design can accurately set the over-temperature point to meet the current standard requirements for over-temperature.

[0031] 3. In summary, the utility model can achieve uniform and stable heating of the knee joint therapeutic device, small temperature error, good user experience, and over-temperature protection design, which effectively solves the problems existing in traditional temperature fuses, can achieve lower fusing temperature, smaller fusing error temperature, and very small volume, and has almost no effect on the appearance of the product. Moreover, the whole solution is low-cost and suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Attached Figure 1 This is a schematic block diagram of the structure of an embodiment of the utility model;

[0033] Attached Figure 2 A specific schematic block diagram of an embodiment of the utility model;

[0034] Attached Figure 3 This is the circuit diagram of the single-chip microcomputer control module;

[0035] Attached Figure 4 is a circuit diagram of a power control module;

[0036] Attached Figure 5 This is the circuit diagram of the heating module;

[0037] Attached Figure 6 This is the circuit diagram of the NTC module.

[0038] 1. Power supply components;

[0039] 11. Mains power supply part; 111. Mains power supply conversion module;

[0040] 12. Power conversion part; 121. Charging module; 122. Battery module; 123. Power step-down module;

[0041] 2. Control components;

[0042] 21. Single chip microcomputer control module; 22. Heating module; 23. Temperature control module; 24. Over temperature control module; 25. Display module;

[0043] 3. Patient connection components;

[0044] 31. Heating layer; 32. First thermistor temperature sensor; 33. Second thermistor temperature sensor. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] like Figure 1 , Figure 2As shown, the embodiment of the utility model proposes a knee joint therapeutic instrument with dual NTC temperature control function, the knee joint therapeutic instrument includes an electrically connected power supply component 1, a control component 2, and a patient connection component 3; the power supply component 1 is electrically connected to the control component 2 and the patient connection component 3 and supplies power to the control component 2 and the patient connection component 3; the control component 2 has a single-chip control module 21, a heating module 22, a temperature control module 23, and an over-temperature control module 24; the patient connection component 3 has a heating layer 31, a first thermistor temperature sensor 32, and a second thermistor temperature sensor 33, the first thermistor temperature sensor 32 and the second thermistor temperature sensor 33 are arranged at the heating layer layer 31; the single-chip control module 21, the heating module 22, and the heating layer 31 are electrically connected, and the single-chip control module 21 controls the heating module 22 to provide energy for the heating of the heating layer 31; the single-chip control module 21, the temperature control module 23, and the first thermistor temperature sensor 32 are electrically connected, and the first thermistor temperature sensor 32 provides a signal to the temperature control module 23 and then feeds back to the single-chip control module 21 for temperature control; the power supply component 1, the over-temperature control module 24, and the second thermistor temperature sensor 33 are electrically connected, and the second thermistor temperature sensor 33 provides a signal to the over-temperature control module 24 and then feeds back to the power supply component 1 for over-temperature protection.

[0047] After adopting the above-mentioned embodiment of the utility model, its working process can be referred to as follows.

[0048] Temperature control process:

[0049] For temperature control, when the user uses it, the power supply component 1 supplies power to the control component 2. When the user turns on the heating, the single-chip control module 21 controls the heating module 22 to work, and the heating module 22 provides energy for the heating layer 31. At this time, the heating layer 31 will continue to heat up, and the resistance value of the first thermistor temperature sensor 32 will continue to decrease. When the temperature control module 23 detects that the temperature of the heating layer 31 has reached the set temperature, it will feedback to the single-chip control module 21. The single-chip control module 21 controls the heating module 22 to disconnect. At this time, the heating layer 31 begins to cool down. When the temperature of the heating layer 31 is lower than the set temperature, the single-chip control module 21 will control the heating module 22 to work through the program. The cycle will continue like this, and the temperature will fluctuate around the set point. At this time, the on-off time will be controlled at the ms level, and the peak-to-peak value of the temperature fluctuation will be very small, which realizes constant temperature control. Controlling this temperature within the set temperature and controlling the running time of each operation can well meet the current standard requirements for heating time.

[0050] Over-temperature protection process:

[0051] As for over-temperature protection, it is considered that if there is a single fault, when the single-chip control module 21 cannot control the heating module 22, the heating layer 31 will continue to heat up, and when it reaches the over-temperature alarm point, the second thermistor 33 will feed back the temperature to the over-temperature control module 24. This module is a pure hardware module and is not affected by the single-chip control module 21. Therefore, the over-temperature control module 24 can provide a power-off signal to the power supply component 1 very stably. The power supply component 1 will cut off the power supply of the single-chip control module 21. The single-chip control module 21 has no output and shuts down, thereby turning off the heating module 22. This process cannot be restored automatically and must be restored through human intervention. This effectively avoids burns to the human body caused by continuous high temperature. Due to the high-precision characteristics of the second thermistor 33, the over-temperature point can be judged very accurately. During maintenance, there is no need to replace the second thermistor 33. Only the damaged module can be checked, which reduces the maintenance cost. This over-temperature protection design scheme can accurately set the over-temperature point to meet the current standard requirements for over-temperature.

[0052] In one embodiment of the utility model, the heating layer 31 includes a carbon nanotube layer and / or a graphene layer. The heating layer 31 adopts planar heating and is heated evenly. The thermal conversion efficiency of the carbon nanotubes or graphene is very high, which saves energy. The temperature is measured using a thermistor. The thermistor itself has a relatively high temperature measurement accuracy. Combined with the planar heating carbon nanotubes or graphene, it can avoid temperature misjudgment caused by uneven heating, and solve the problem of large error between the actual temperature and the set temperature from the root. Since the carbon nanotubes or graphene heat up quickly when running at full power, when the single-chip control module 21 cannot control the heating module 22, the heating layer 31 will quickly heat up to an over-temperature condition, thereby quickly triggering a power outage, thereby ensuring that the time from the set temperature to the over-temperature does not exceed the existing standard requirements.

[0053] In another embodiment of the utility model, the power supply assembly 1 includes a network power supply part 11 and a power conversion part 12, the network power supply part 11 includes a network power conversion module 111, the power conversion part 12 includes a charging module 121, a battery module 122, and a power step-down module 123, the network power conversion module 111, the charging module 121, the battery module 122, and the power step-down module 123 are electrically connected, and the power step-down module 123 is electrically connected to the single-chip control module 21 and the over-temperature control module 24 respectively. The network power conversion module 111 converts 220V AC mains into DC power, and charges the battery module 122 through the charging module 121. When the user uses it, the battery module 122 will continuously output DC power, which is stepped down through the power control module and powered to the single-chip control module 21, thereby getting rid of the limitation of the power cord, so that the user can be free from the limitation of the use environment and can perform medical treatment and health care anytime and anywhere.

[0054] In another embodiment of the utility model, the single-chip control module 21 includes a single-chip chip, the single-chip chip lead pins are connected to the power buck module 123, and the single-chip chip lead pins are connected to the heating module 22 and the temperature control module 23, so as to achieve orderly and reliable control of the relevant control. Furthermore, the single-chip control chip is also connected to a display module 25, so as to display the relevant data, temperature, over-temperature conditions, etc. in the display module 25, so that the user can know the use of the therapeutic device.

[0055] In addition, one specific detailed embodiment is described.

[0056] This detailed embodiment proposes a knee joint therapeutic device with a dual NTC temperature control function, which includes an electrically connected power supply component 1, a control component 2, and a patient connection component 3.

[0057] In this detailed embodiment, the power supply component 1 is electrically connected to the control component 2 and the patient connection component 3 and supplies power to the control component 2 and the patient connection component 3. The power supply component 1 includes a network power supply part 11 and a power conversion part 12. The network power supply part 11 includes a network power conversion module 111. The power conversion part 12 includes a charging module 121, a battery module 122, and a power step-down module 123. The network power conversion module 111, the charging module 121, the battery module 122, and the power step-down module 123 are electrically connected. The power step-down module 123 is electrically connected to the single-chip control module 21 and the over-temperature control module 24, respectively.

[0058] In this detailed embodiment, the control component 2 includes a single-chip control module 21, a heating module 22, a temperature control module 23, and an over-temperature control module 24. The single-chip control module 21 includes a single-chip chip, the single-chip chip lead pins are connected to the power supply step-down module 123, and the single-chip chip lead pins are connected to the heating module 22 and the temperature control module 23.

[0059] In this detailed embodiment, the patient connection component 3 has a heating layer 31, a first thermistor temperature sensor 32, and a second thermistor temperature sensor 33. The heating layer 31 includes a carbon nanotube layer and / or a graphene layer, and the first thermistor temperature sensor 32 and the second thermistor temperature sensor 33 are arranged on the heating layer 31.

[0060] In this detailed embodiment, the single-chip control module 21, the heating module 22, and the heating layer 31 are electrically connected, and the single-chip control module 21 controls the heating module 22 to provide energy for the heating of the heating layer 31. The single-chip control module 21, the temperature control module 23, and the first thermistor temperature sensor 32 are electrically connected, and the first thermistor temperature sensor 32 provides a signal to the temperature control module 23 and then feeds it back to the single-chip control module 21 for temperature control. The power supply component 1, the over-temperature control module 24, and the second thermistor temperature sensor 33 are electrically connected, and the second thermistor temperature sensor 33 provides a signal to the over-temperature control module 24 and then feeds it back to the power supply component 1 for over-temperature protection.

[0061] The specific circuit principle of this detailed embodiment is described below in conjunction with the circuit diagrams of each module. Figure 3 This is the circuit diagram of the single-chip microcomputer control module. Figure 4 This is the circuit diagram of the power control module. Figure 5 This is the circuit diagram of the heating module. Figure 6 This is the circuit diagram of the NTC module.

[0062] NTC temperature measurement instructions:

[0063] When the user turns on the heating, the MCU controls Q15 to turn on by giving a high level HOT_N signal to the 13th pin, thereby heating the heating layer. At this time, the external NTC resistor values ​​of pins 3 and 4 of J4 begin to decrease as the temperature rises. Due to the voltage division with R46, the voltage at the NTC1 point on the 4th pin of J4 will decrease as the temperature rises. When it drops to the set value, the MCU controls the MOS tube Q15 to turn off by giving a low level HOT_N signal to the 13th pin. At this time, the temperature of the heating layer begins to drop, and the resistance of the NTC resistor begins to increase as the temperature decreases. The voltage division at the NTC1 point on the 4th pin of J4 begins to increase. When it is higher than the set value, the MCU controls Q15 to turn on by giving a high level HOT_N signal to the 13th pin, thereby heating the heating layer. This cycle can control the heating layer at the set temperature.

[0064] NTC over-temperature protection description:

[0065] When the above NTC fails or the 13th pin of the microcontroller is out of control and continuously outputs a high level, the heating layer will continue to heat up. The resistance value of the second NTC connected to the 1st and 2nd pins of J4 decreases as the temperature rises. Due to the voltage division with R42, the voltage at the NTC2 point of the 2nd pin of J4 (connected to the 3rd pin of U9) will increase as the temperature rises. The voltage division of R23 and R44 sets a clear reverse voltage for the 4th pin of U9. This voltage is the over-temperature threshold point we set. When the temperature of the heating layer is low, the NTC2 voltage is lower than the reverse voltage. When voltage is applied, pin 1 of U9 outputs a low level, pin 1 of Q1 is a low level, and Q1 does not work. When the temperature of the heating layer exceeds the threshold point, the voltage of NTC2 is higher than the reverse voltage, pin 1 of U9 outputs a high level, pin 1 of Q1 is a high level, Q1 is turned on, and pin 3 of Q1, Hot_High, becomes pulled down to ground. The B pole of Q11 is connected to Hot_High and is also pulled down to ground, so that Q11 does not conduct. The potential of the C pole of Q11 becomes Vbat, causing Q3 to shut down, thereby shutting down 3V, cutting off the power supply of the microcontroller, and causing the product to shut down.

[0066] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A knee joint therapeutic device with dual NTC temperature control function, characterized in that: The knee joint therapeutic device comprises a power supply component (1), a control component (2), and a patient connection component (3) which are electrically connected; The power supply component (1) is electrically connected to the control component (2) and the patient connection component (3) and supplies power to the control component (2) and the patient connection component (3); The control component (2) comprises a single-chip control module (21), a heating module (22), a temperature control module (23), and an over-temperature control module (24); The patient connection component (3) comprises a heating layer (31), a first thermosensitive temperature sensor (32), and a second thermosensitive temperature sensor (33), wherein the first thermosensitive temperature sensor (32) and the second thermosensitive temperature sensor (33) are arranged on the heating layer (31); The single-chip control module (21), the heating module (22), and the heating layer (31) are electrically connected, and the single-chip control module (21) controls the heating module (22) to provide energy for the heating of the heating layer (31); The single-chip control module (21), the temperature control module (23), and the first thermistor temperature sensor (32) are electrically connected, and the first thermistor temperature sensor (32) provides a signal to the temperature control module (23) and then feeds it back to the single-chip control module (21) to perform temperature control; The power supply component (1), the over-temperature control module (24), and the second thermistor temperature sensor (33) are electrically connected, and the second thermistor temperature sensor (33) provides a signal to the over-temperature control module (24) and then feeds back to the power supply component (1) for over-temperature protection.

2. The knee joint therapeutic device with dual NTC temperature control function according to claim 1, characterized in that: The heating layer (31) comprises a carbon nanotube layer and / or a graphene layer.

3. The knee joint therapeutic device with dual NTC temperature control function according to claim 1, characterized in that: The power supply assembly (1) comprises a mains power supply part (11) and a power conversion part (12); the mains power supply part (11) comprises a mains power conversion module (111); the power conversion part (12) comprises a charging module (121), a battery module (122), and a power voltage reduction module (123); the mains power conversion module (111), the charging module (121), the battery module (122), and the power voltage reduction module (123) are electrically connected; and the power voltage reduction module (123) is electrically connected to the single-chip control module (21) and the over-temperature control module (24), respectively.

4. The knee joint therapeutic device with dual NTC temperature control function according to claim 3 is characterized in that: The single-chip microcomputer control module (21) comprises a single-chip microcomputer chip, the single-chip microcomputer chip lead pins are connected to the power supply voltage reduction module (123), and the single-chip microcomputer chip lead pins are connected to the heating module (22) and the temperature control module (23).

5. The knee joint therapeutic device with dual NTC temperature control function according to claim 4, characterized in that: The single-chip microcomputer chip is also connected to a display module (25).

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