Itching relieving circuit and itching relieving instrument

Abstract

The utility model provides an antipruritic circuit and an antipruritic instrument, and relates to the field of medical instruments, the antipruritic circuit comprises a power supply module, a mode selection module, a starting module, a microprocessor, an indicating lamp module, a temperature acquisition module, a heating module, a ceramic chip and a buzzer module; after the itching relieving circuit is started through the starting module, the adult working mode or the child working mode of the itching relieving instrument is selected according to the mode selection module, the heating gear of the ceramic chip is selected through the starting module, and the preset temperature of the ceramic chip is determined. By means of the mode, different users can rapidly determine the heating treatment temperature suitable for themselves when using the itching relieving instrument, and therefore the itching relieving requirements of different crowds are met; meanwhile, the itching relieving circuit is simple in structure, low in cost and low in power consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an antipruritic circuit and an antipruritic instrument. Background Art

[0002] Mosquito bites can make sleep difficult and spread disease. However, completely eliminating mosquitoes is difficult; mosquito bites are inevitable. When a female mosquito bites, its saliva secretes an organic acid that acts like an anticoagulant, preventing blood from clotting and allowing the mosquito to feed smoothly. This organic acid, with its chemical composition of HCOOH, can cause allergic reactions on the skin, such as redness, swelling, itching, and pain.

[0003] Currently, using heating temperature to relieve skin itching is a common treatment method. However, the skin tolerance temperature of adults and children is different. Most existing anti-itch devices use a high temperature treatment temperature and control different heating time to relieve skin itching. However, when using it, users cannot adapt to this temperature, which leads to burning pain. There are also a few anti-itch devices that can set multiple heating treatment temperatures, but users cannot determine which treatment temperature range is suitable for them, which brings inconvenience to users. At the same time, the internal control circuit structure of existing anti-itch devices is complex, the cost is high, and the power consumption is fast. Utility Model Content

[0004] The utility model provides an antipruritic circuit and an antipruritic device, which are used to solve the problems that the existing antipruritic devices cannot distinguish between suitable heating temperatures for children and adults, have complex internal circuit structures, high costs, and fast power consumption.

[0005] The utility model provides an anti-itch circuit, comprising: a power supply module, a mode selection module, a start module, a microprocessor, an indicator light module, a temperature acquisition module, a heating module, a ceramic piece, and a buzzer module;

[0006] The power supply module includes a data line interface, a charging protection module, and a power supply, wherein one side of the data line interface is connected to one side of the charging protection module, and the other side of the charging protection module is connected to the power supply, and the power supply supplies power to the mode selection module, the startup module, the indicator light module, the heating module, the ceramic sheet, the temperature acquisition module, the buzzer module, and the microprocessor;

[0007] The mode selection module, the start module, the indicator light module, the heating module, the temperature acquisition module, and the buzzer module are respectively connected to the microprocessor;

[0008] The heating module is connected to the ceramic sheet and is used to heat the ceramic sheet;

[0009] The mode selection module includes a mode selection key for switching between an adult working mode and a child working mode; the start module includes a start button for starting the anti-itch circuit and selecting the heating gear of the ceramic sheet.

[0010] According to an anti-itch circuit provided by the utility model, the charging protection module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a first TVS diode, an inductor L1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, and a charging protection chip, wherein one end of the first TVS diode and one end of the inductor L1 are respectively connected to the power output end of the data line interface, the other end of the first TVS diode is grounded, and the other end of the inductor L1 is respectively connected to one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R1, and the power input end of the charging protection chip. The detection end of the charging protection chip is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the power supply. The voltage output end of the charging protection chip is connected to one end of the capacitor C4 and the charging input end of the power supply, respectively. The other end of the capacitor C4 is grounded. The feedback end of the charging protection chip is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded.

[0011] According to an anti-itching circuit provided by the utility model, the heating module includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, and a MOS tube Q1, wherein one end of the resistor R5 is connected to the microprocessor, and the other end of the resistor R5 is respectively connected to one end of the resistor R6, one end of the resistor R7, and the gate of the MOS tube Q1, the other end of the resistor R6 and the other end of the resistor R7 are respectively grounded, the source of the MOS tube Q1 is grounded, the drain of the MOS tube Q1 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to the negative electrode of the ceramic piece, and the positive electrode of the ceramic piece is connected to the power supply.

[0012] According to an anti-itching circuit provided by the utility model, the temperature acquisition module includes a thermistor R9, a resistor R10, and an inductor L2, wherein one end of the inductor L2 is connected to the microprocessor, and the other end of the inductor L2 is respectively connected to one end of the resistor R10, one end of the thermistor R9, and one end of the second TVS diode, the other end of the resistor R10 is connected to the power supply, and the other end of the thermistor R9 is grounded.

[0013] According to an anti-itch circuit provided by the utility model, the buzzer module includes a capacitor C5, a resistor R11, a resistor R12, a resistor R13, a transistor Q2, and a buzzer, wherein one end of the resistor R11 is respectively connected to the capacitor C5 and the power supply, the other end of the resistor R11 is connected to one end of the buzzer, the other end of the buzzer is connected to the collector of the transistor Q2, the base of the transistor Q2 is respectively connected to one end of the resistor R12 and one end of the resistor R13, the other end of the resistor R12 is connected to the microprocessor, and the resistor R13 and the emitter of the transistor Q2 are respectively grounded.

[0014] According to an anti-itching circuit provided by the present invention, the start module includes a start button S1 and a resistor R14, wherein one end of the resistor R14 is connected to the microprocessor and one end of the start button S1 respectively, the other end of the resistor R14 is connected to the power supply, and the other end of the start button S1 is grounded;

[0015] The mode selection module includes a mode selection key S2 and a resistor R15, wherein one end of the resistor R15 is connected to the power supply, and the other end of the resistor R15 is respectively connected to one end of the mode selection key S2 and the microprocessor, and the other end of the mode selection key S2 is grounded.

[0016] According to an anti-itching circuit provided by the utility model, the indicator light module includes multiple indicator lights and current limiting resistors corresponding to the indicator lights, wherein one end of the indicator light is connected to the microprocessor, the other end of the indicator light is connected to one end of the current limiting resistor, and the other end of the current limiting resistor is connected to the power supply.

[0017] According to an anti-itch circuit provided by the present invention, the buzzer module also includes a diode D1, wherein the cathode of the diode D1 is respectively connected to one end of the buzzer and the other end of the resistor R11, and the anode of the diode is respectively connected to the other end of the buzzer and the collector of the transistor Q2.

[0018] The present utility model also provides an anti-itch instrument, which includes an upper shell, a lower shell and the anti-itch circuit as described above, wherein the upper shell and the lower shell constitute the anti-itch instrument shell, the anti-itch circuit is located in the anti-itch instrument shell, and the ceramic piece of the anti-itch circuit is located at one end of the anti-itch instrument shell, and the data line interface of the anti-itch circuit is located at the other end of the anti-itch instrument shell.

[0019] The present utility model also provides an anti-itching device, wherein the upper shell is provided with a first through hole and a second through hole, wherein the first through hole is adjacent to the ceramic sheet and is used to pass the start button S1 of the anti-itching circuit through the first through hole, and the second through hole is adjacent to the data line interface and is used to pass the mode selection button S2 of the anti-itching circuit through the second through hole.

[0020] The anti-itch circuit provided by the utility model is provided with a start button and a mode selection button. After the anti-itch device is started by the start button, the adult working mode or the child working mode of the anti-itch device is selected according to the mode selection button. The start button is used to select the heating gear of the ceramic plate to determine the preset temperature of the ceramic plate. The temperature acquisition module collects the resistance value of the temperature change of the thermistor adjacent to the ceramic plate to determine whether the temperature of the ceramic plate reaches the preset temperature. If the preset temperature is reached, the buzzer module sounds a prompt, thereby achieving the effect of using the heating temperature of the ceramic plate to relieve itching. The anti-itch circuit is suitable for users of different age groups, such as adults and children, and has a simple circuit structure, low cost, and low power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a principle block diagram of the anti-itching circuit of the utility model;

[0023] Figure 2 This is a functional block diagram of the charging protection module of the present utility model;

[0024] Figure 3 This is a principle block diagram of the heating module of the present utility model;

[0025] Figure 4 This is a principle block diagram of the temperature acquisition unit module of the present utility model;

[0026] Figure 5 This is a functional block diagram of the buzzer module of the present utility model;

[0027] Figure 6 This is a functional block diagram of the startup module of the present utility model;

[0028] Figure 7 This is a principle block diagram of the mode selection module of the present utility model;

[0029] Figure 8 This is a functional block diagram of the microprocessor of the present utility model;

[0030] Figure 9 It is a structural schematic diagram of the antipruritic device of the present utility model. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] The utility model provides an anti-itch circuit, please refer to Figure 1 , Figure 1 This is a block diagram of the principle of the anti-itch circuit of the present invention. In this embodiment, the anti-itch circuit may include a power supply module 10, a mode selection module 30, a start module 20, a microprocessor 40, an indicator light module 80, a temperature acquisition module 70, a heating module 60, a ceramic plate 90, and a buzzer module 50;

[0033] The power supply module 10 includes a data line interface 11, a charging protection module 12, and a power supply 13, wherein one side of the data line interface 11 is connected to one side of the charging protection module 12, and the other side of the charging protection module 12 is connected to the power supply 13. The power supply 13 supplies power to the mode selection module 30, the starting module 20, the indicator light module 80, the heating module 60, the ceramic plate 90, the temperature acquisition module 70, the buzzer module 50, and the microprocessor 40.

[0034] The mode selection module 30, the start module 20, the indicator light module 80, the heating module 60, the temperature acquisition module 70, and the buzzer module 50 are respectively connected to the microprocessor 40;

[0035] The heating module 60 is connected to the ceramic sheet 90 and is used to heat the ceramic sheet 90;

[0036] The mode selection module 30 includes a mode selection key for switching between an adult working mode and a child working mode; the start module 20 includes a start button for starting the anti-itch circuit and selecting a heating level of the ceramic sheet 90 .

[0037] In this embodiment, the power supply 13 is a rechargeable battery, which is connected to a 5V power supply through the data line interface 11 and is charged by the charging protection module 12. When the charging protection module 12 detects that the power of the power supply 13 has reached a preset value, the charging protection module 12 stops supplying power to the power supply 13.

[0038] In this embodiment, the user uses the start button to start the anti-itch circuit, and the user selects the working mode of the anti-itch instrument through the mode selection module 30. After the anti-itch instrument is started, the user uses the start button to press the number of times to select low-temperature heating, medium-temperature heating and high-temperature heating corresponding to different working modes, so as to determine the preset temperature of the ceramic piece 90. The anti-itch instrument heats the ceramic piece 90 through the heating module 60, and the temperature acquisition module 70 acquires the heating temperature of the ceramic piece 90. If the temperature of the ceramic piece 90 reaches the preset temperature, the buzzer module 50 sounds to remind the user that the preset temperature has been reached. At the same time, in order to improve the treatment effect, when the ceramic piece 90 reaches the preset temperature, the ceramic piece 90 can maintain constant temperature heating for a certain period of time to improve the treatment effect of heating to relieve itching. After the ceramic piece 90 is heated at a constant temperature, the heating module 60 stops heating the ceramic piece.

[0039] In this embodiment, the heating gear includes three gears: low temperature, medium temperature, and high temperature. Since the temperature that adults and children's skin can tolerate is different, the user can select the heating temperature range of the anti-itch instrument through the mode selection key of the mode selection module 30. Among them, in the adult working mode, the low temperature, medium temperature, and high temperature that the ceramic piece can be heated to are 45°C, 47°C, and 50°C, while in the child working mode, the low temperature, medium temperature, and high temperature that the ceramic piece can be heated to are 40°C, 42°C, and 44°C. By using the mode selection button to select the anti-itch instrument working mode and using the starting module 20 to select the specific heating gear of the ceramic piece, the user can accurately find the treatment temperature that suits him when using the anti-itch instrument, avoid poor anti-itching effect or the adverse effects of skin burns, and facilitate user use.

[0040] In one embodiment, if Figure 2 As shown, the charging protection module 12 includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a first TVS diode, an inductor L1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, and a charging protection chip, wherein one end of the first TVS diode and one end of the inductor L1 are respectively connected to the power output end of the data line interface, the other end of the first TVS diode is grounded, the other end of the inductor L1 is respectively connected to one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R1, and the power input end of the charging protection chip, and the capacitor C1 is connected to the power input end of the charging protection chip. One end of the charging protection chip and the other end of the capacitor C2 are respectively grounded, the other end of the resistor R1 is respectively connected to one end of the resistor R2 and one end of the capacitor C3, the other end of the resistor R2 and the other end of the capacitor C3 are respectively grounded, the detection end of the charging protection chip is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the power supply, the voltage output end of the charging protection chip is respectively connected to one end of the capacitor C4 and the charging input end of the power supply 13, the other end of the capacitor C4 is grounded, the feedback end of the charging protection chip is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded.

[0041] In this embodiment, the 5V voltage connected through the data line interface 11 is connected to the TVS tube and the inductor L1 respectively. The TVS tube is used to prevent the voltage of the data line interface from being too high to damage other circuit components and protect the circuit. The data line interface voltage is filtered by the inductor L1, the capacitor C1, and the capacitor C2, and then the power supply 13 is powered by a charging protection chip to prevent the power supply 13 from being overcharged. The charging protection chip model is HB4054AT5.

[0042] The voltage output terminal of the charging protection chip, i.e., the VBAT terminal output voltage is connected to the positive electrode of the power supply 13 after being filtered by the capacitor C4. At the same time, the positive electrode of the power supply 13 is also connected to the resettable fuse, which supplies power to each circuit module of the anti-itch instrument after passing through the resettable fuse.

[0043] In this embodiment, in order to detect the effectiveness of charging the power supply, the R2 resistor voltage can be collected by the microprocessor 40, that is, the divided voltage of the resistor R1 and the resistor R2 after the data line interface voltage 11 is filtered, to detect whether the data line interface is effectively connected to the 5V voltage.

[0044] The charging protection module 12 of this embodiment can prevent the voltage of the data line interface 11 from overcharging the power supply 13, improve the power supply quality of the voltage of the data line interface 11 through filtering, and use the TVS tube to prevent the instantaneous voltage of the data line interface from being too large to damage the circuit, thereby protecting the charging of the power supply 13 and improving the charging reliability of the power supply 13.

[0045] In one embodiment, if Figure 3 As shown, the heating module 60 includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, and a MOS tube Q1, wherein one end of the resistor R5 is connected to the microprocessor 40, and the other end of the resistor R5 is respectively connected to one end of the resistor R6, one end of the resistor R7, and the gate of the MOS tube Q1, the other end of the resistor R6 and the other end of the resistor R7 are respectively grounded, the source of the MOS tube Q1 is grounded, the drain of the MOS tube Q1 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to the negative electrode of the ceramic plate, and the positive electrode of the ceramic plate is connected to the power supply 13.

[0046] In this embodiment, the microprocessor 40 provides a PWM signal to the heating module 60, which controls the conduction state of the MOS transistor Q1. If the MOS transistor Q1 is on, the negative electrode of the ceramic plate 90 is grounded via the resistor R8, and the ceramic plate 90 is heated. If the MOS transistor Q1 is off, the ceramic plate 90 stops heating. The heating module 60 has a simple circuit structure, low cost, low power consumption, good heating control effect, and high heating reliability.

[0047] In one embodiment, if Figure 4 As shown, the temperature acquisition module 70 includes a thermistor R9, a resistor R10, and an inductor L2, wherein one end of the inductor L2 is connected to the microprocessor 40, and the other end of the inductor L2 is respectively connected to one end of the resistor R10, one end of the thermistor R9, and one end of the second TVS diode. The other end of the resistor R10 is connected to the power supply 13, and the other end of the thermistor R9 is grounded.

[0048] In this embodiment, the power supply 13 supplies power to thermistor R9 via resistor R10. Thermistor R9 is located adjacent to the ceramic sheet, on the side of the ceramic sheet 90 that faces away from the user's skin. The resistance of thermistor R9 changes with the temperature of the ceramic sheet. The microprocessor 40 determines whether the heating temperature of the ceramic sheet has reached a preset temperature by collecting the resistance of thermistor R9. If not, the ceramic sheet continues heating. If it has reached the preset temperature, the ceramic sheet uses the preset temperature to heat the red and swollen areas of the user's skin. To improve the treatment effect, the ceramic sheet 90 can maintain heating at the preset temperature for a certain period of time. The temperature acquisition module 70 has a simple circuit structure and can collect the heating temperature of the ceramic sheet 90 in real time, thereby ensuring more accurate heating temperature and higher heating reliability.

[0049] In one embodiment, if Figure 5 As shown, the buzzer module 50 includes a capacitor C5, a resistor R11, a resistor R12, a resistor R13, a transistor Q2, and a buzzer, wherein one end of the resistor R11 is connected to the capacitor C5 and the power supply 13 respectively, the other end of the resistor R11 is connected to one end of the buzzer, the other end of the buzzer is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R12 and one end of the resistor R13 respectively, the other end of the resistor R12 is connected to the microprocessor 40, and the emitters of the resistor R13 and the transistor Q2 are grounded respectively;

[0050] In this embodiment, the conduction state of the transistor Q2 is controlled by the microprocessor 40. If the transistor Q2 is turned on, the power supply 13 supplies power to the buzzer, and the buzzer provides a sound prompt. If the transistor Q2 is not turned on, the power supply 13 stops supplying power to the buzzer.

[0051] In this embodiment, when the heating temperature of the ceramic sheet 90 reaches the preset temperature, the microprocessor provides a conduction voltage to the transistor Q2, and the buzzer sounds a prompt.

[0052] In another embodiment, the buzzer module 50 further includes a diode D1 , wherein the cathode of the diode D1 is respectively connected to one end of the buzzer and the other end of the resistor R11 , and the anode of the diode is respectively connected to the other end of the buzzer and the collector of the transistor Q2 .

[0053] In this embodiment, diodes D1 are added across the buzzer to quickly dissipate the electromotive force released by the buzzer's internal coil when the power is removed, thereby preventing the buzzer from continuing to sound even when the power is removed. The buzzer module 50 has a simple circuit structure, low cost, low power consumption, and good control performance.

[0054] In one embodiment, if Figure 6 、 Figure 7 As shown, the starting module 20 includes a starting button S1 and a resistor R14, wherein one end of the resistor R14 is respectively connected to the microprocessor 40 and one end of the starting button S1, the other end of the resistor R14 is connected to the power supply 13, and the other end of the starting button S1 is grounded; the mode selection module 30 includes a mode selection key S2 and a resistor R15, wherein one end of the resistor R15 is connected to the power supply 13, the other end of the resistor R15 is respectively connected to one end of the mode selection key S2 and the microprocessor 40, and the other end of the mode selection key S2 is grounded.

[0055] In this embodiment, the anti-itching device is activated by the start button S1. When the start button S1 is activated, the microprocessor 40 controls the anti-itching device to start working. The working mode of the anti-itching device is selected by the mode selection button S2. The mode selection button S2 has two gears, the first gear is the adult working mode, and the second gear is the child working mode.

[0056] Furthermore, the anti-itching device can change the preset temperature of the ceramic plate 90 according to the number of times the start button S1 is pressed;

[0057] In this embodiment, the user can determine the preset temperature of the ceramic plate 90 by selecting the gear position of the mode selection key S2 and the gear position of the start button S1 after the anti-itch device is started; it is convenient for different users to choose the heating temperature treatment that suits them and is easy to use.

[0058] In one embodiment, the indicator light module 80 includes a plurality of indicator lights and current limiting resistors corresponding to the indicator lights, wherein one end of the indicator light is connected to the microprocessor 40, the other end of the indicator light is connected to one end of the current limiting resistor, and the other end of the current limiting resistor is connected to the power supply 13;

[0059] In this embodiment, the indicator light includes the ceramic piece preset temperature indicator light, and the number of the indicator lights is consistent with the corresponding number of the current limiting resistors. The number of the ceramic piece preset temperature indicator lights is 6, and 6 indicator lights of different colors can be selected to facilitate the user to identify the selected ceramic piece preset temperature.

[0060] In this embodiment, in order to facilitate the user to confirm whether the power supply 13 is fully charged, a power status indicator light can be added, which is located on the side of the ceramic plate facing away from the user's skin, adjacent to the thermistor R9; the number of the power status indicator light is one.

[0061] In this embodiment, the power charging status indicator light reflects whether the power supply is fully charged. If the power supply is fully charged, the charging status indicator light is green, otherwise it is red; the ceramic plate preset temperature indicator light reflects the ceramic plate preset temperature selected by the start button S1 in different working modes of the anti-itch instrument.

[0062] In one embodiment, if Figure 8 As shown, the microprocessor 40 is the control center of the anti-itch circuit, which controls the coordinated work of the mode selection module 30, the start module 20, the indicator light module 80, the heating module 60, the ceramic piece 90, the temperature acquisition module 70, and the buzzer module 50. Its model is MM32G0001A1NV.

[0063] In one embodiment, if Figure 9 As shown, an anti-itch instrument includes an upper shell 1, a lower shell 2 and the anti-itch circuit as described above, wherein the upper shell 1 and the lower shell 2 constitute the anti-itch instrument shell, the anti-itch circuit is located in the anti-itch instrument shell, and the ceramic piece 90 of the anti-itch circuit is located at one end of the anti-itch instrument shell, and the data line interface 11 of the anti-itch circuit is located at the other end of the anti-itch instrument shell.

[0064] In this embodiment, the upper shell is provided with a first through hole 3 and a second through hole 4, wherein the first through hole 3 is adjacent to the ceramic sheet 90, and is used to pass the start button S1 of the anti-itching circuit through the first through hole 3, and the second through hole 4 is adjacent to the data line interface 11, and is used to pass the mode selection button S2 of the anti-itching circuit through the second through hole 4.

[0065] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Those skilled in the art can understand and implement the present invention without inventive effort.

[0066] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An anti-itch circuit, characterized in that: include: Power supply module, mode selection module, start module, microprocessor, indicator light module, temperature acquisition module, heating module, ceramic chip, buzzer module; The power supply module includes a data line interface, a charging protection module, and a power supply, wherein one side of the data line interface is connected to one side of the charging protection module, and the other side of the charging protection module is connected to the power supply, and the power supply supplies power to the mode selection module, the startup module, the indicator light module, the heating module, the ceramic sheet, the temperature acquisition module, the buzzer module, and the microprocessor; The mode selection module, the start module, the indicator light module, the heating module, the temperature acquisition module, and the buzzer module are respectively connected to the microprocessor; The heating module is connected to the ceramic sheet and is used to heat the ceramic sheet; The mode selection module includes a mode selection key for switching between an adult working mode and a child working mode; the start module includes a start button for starting the anti-itch circuit and selecting the heating gear of the ceramic sheet.

2. The anti-itch circuit according to claim 1, characterized in that: The charging protection module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a first TVS diode, an inductor L1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, and a charging protection chip, wherein one end of the first TVS diode and one end of the inductor L1 are respectively connected to the power output end of the data line interface, the other end of the first TVS diode is grounded, the other end of the inductor L1 is respectively connected to one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R1, and the power input end of the charging protection chip, the other end of the capacitor C1 and the other end of the capacitor C2 are respectively grounded, the other end of the resistor R1 is respectively connected to one end of the resistor R2 and one end of the capacitor C3, the other end of the resistor R2 and the other end of the capacitor C3 are respectively grounded, the detection end of the charging protection chip is connected to one end of the resistor R3, and the other end of the resistor R3 is connected to the power supply, the voltage output end of the charging protection chip is respectively connected to one end of the capacitor C4 and the charging input end of the power supply, the other end of the capacitor C4 is grounded, the feedback end of the charging protection chip is connected to one end of the resistor R4, and the other end of the resistor R4 is grounded.

3. The anti-itch circuit according to claim 2, characterized in that: The heating module includes a resistor R5, a resistor R6, a resistor R7, a resistor R8, and a MOS transistor Q1, wherein one end of the resistor R5 is connected to the microprocessor, the other end of the resistor R5 is respectively connected to one end of the resistor R6, one end of the resistor R7, and the gate of the MOS transistor Q1, the other end of the resistor R6 and the other end of the resistor R7 are respectively grounded, the source of the MOS transistor Q1 is grounded, the drain of the MOS transistor Q1 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to the negative electrode of the ceramic sheet, and the positive electrode of the ceramic sheet is connected to the power supply.

4. The anti-itch circuit according to claim 3, characterized in that: The temperature acquisition module includes a thermistor R9, a resistor R10, and an inductor L2, wherein one end of the inductor L2 is connected to the microprocessor, and the other end of the inductor L2 is respectively connected to one end of the resistor R10, one end of the thermistor R9, and one end of the second TVS diode. The other end of the resistor R10 is connected to the power supply, and the other end of the thermistor R9 is grounded.

5. The anti-itch circuit according to claim 4, characterized in that: The buzzer module includes a capacitor C5, a resistor R11, a resistor R12, a resistor R13, a transistor Q2, and a buzzer, wherein one end of the resistor R11 is connected to the capacitor C5 and the power supply respectively, the other end of the resistor R11 is connected to one end of the buzzer, the other end of the buzzer is connected to the collector of the transistor Q2, the base of the transistor Q2 is connected to one end of the resistor R12 and one end of the resistor R13 respectively, the other end of the resistor R12 is connected to the microprocessor, and the emitters of the resistor R13 and the transistor Q2 are grounded respectively.

6. The anti-itch circuit according to claim 5, characterized in that: The startup module includes a startup button S1 and a resistor R14, wherein one end of the resistor R14 is connected to the microprocessor and one end of the startup button S1 respectively, the other end of the resistor R14 is connected to the power supply, and the other end of the startup button S1 is grounded; The mode selection module includes a mode selection key S2 and a resistor R15, wherein one end of the resistor R15 is connected to the power supply, and the other end of the resistor R15 is respectively connected to one end of the mode selection key S2 and the microprocessor, and the other end of the mode selection key S2 is grounded.

7. The anti-itch circuit according to claim 5, characterized in that: The indicator light module includes multiple indicator lights and current limiting resistors corresponding to the indicator lights, wherein one end of the indicator light is connected to the microprocessor, the other end of the indicator light is connected to one end of the current limiting resistor, and the other end of the current limiting resistor is connected to the power supply.

8. The anti-itch circuit according to claim 5, characterized in that: The buzzer module further includes a diode D1 , wherein the cathode of the diode D1 is respectively connected to one end of the buzzer and the other end of the resistor R11 , and the anode of the diode is respectively connected to the other end of the buzzer and the collector of the transistor Q2 .

9. An antipruritic device, characterized in that: The anti-itch instrument includes an upper shell, a lower shell and the anti-itch circuit according to any one of claims 1 to 8, wherein the upper shell and the lower shell constitute the anti-itch instrument shell, the anti-itch circuit is located inside the anti-itch instrument shell, and the ceramic piece of the anti-itch circuit is located at one end of the anti-itch instrument shell, and the data line interface of the anti-itch circuit is located at the other end of the anti-itch instrument shell.

10. The antipruritic device according to claim 9, characterized in that: The upper shell is provided with a first through hole and a second through hole, wherein the first through hole is adjacent to the ceramic sheet and is used to pass the start button S1 of the anti-itching circuit through the first through hole, and the second through hole is adjacent to the data line interface and is used to pass the mode selection button S2 of the anti-itching circuit through the second through hole.

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