CN110801575A - Portable intermediate frequency therapeutic instrument - Google Patents

Abstract

The invention discloses a portable intermediate frequency therapeutic apparatus, which belongs to the technical field of medical instruments and comprises a shell and a skin contact part connected with the shell through a lead, wherein an electrode plate is arranged on the skin contact part, a power supply and an MCU (microprogrammed control unit) chip are arranged in the shell, a control switch is arranged on the shell, one path of the output end of the power supply supplies power to the MCU chip, the other path of the output end of the power supply is connected with the electrode plate through a booster circuit and a pulse modulation circuit, the control ends of the booster circuit and the pulse modulation circuit are both connected to the MCU chip, the MCU chip is also connected with a communication chip used for communicating with external equipment, the power supply is a built-in. The portable intermediate frequency therapeutic apparatus is small, portable and low in cost.

Description

A portable medium frequency therapeutic apparatus

technical field

The invention relates to the technical field of medical devices, in particular to a portable intermediate frequency therapeutic apparatus.

Background technique

Intermediate frequency electric stimulation therapy is a physical treatment method that uses an intermediate frequency electric stimulation therapeutic apparatus to treat diseases by outputting currents with a frequency of 1kHz-100kHz. Clinical studies and applications have confirmed its wide range of curative effects, including: analgesia, improvement of local blood circulation, promotion of inflammation dissipation, softening of scars, release of adhesions, stimulation of neuromuscular tissue, etc. At present, the medium-frequency electrical stimulation treatment equipment used in clinic is mainly operated and used by professionals in medical institutions to provide treatment services for patients. Patients in need need to go to the corresponding medical institutions for treatment.

The use of traditional medium-frequency electrical stimulation therapy equipment is relatively limited. The main reasons include: 1. In order to achieve effective frequency and treatment intensity, an external power supply is required for power supply; 3. The manufacturing cost of the equipment is high, which increases the economic burden of medical institutions and patients.

With the improvement of people's living standards, the emphasis on health is getting higher and higher, but the pace of life is also getting faster and faster, and the inconvenience of traditional large-scale medium-frequency electrical stimulation treatment equipment that can only be used in medical institutions is more prominent. It cannot meet the needs of users to use it anytime and anywhere outside the hospital. Miniaturizing and wearable medium-frequency electrical stimulation treatment equipment, and reducing manufacturing costs, will effectively increase the convenience, help users to use it anytime and anywhere when they need it in daily life, relieve discomfort symptoms in time, and improve the treatment effect.

According to the "Guidelines for Technical Review of Intermediate Frequency Electrotherapy Product Registration (Revised 2017)", the safe and effective discharge output frequency range of intermediate frequency electrical stimulation therapy equipment is 1kHz-100kHz. Electrical stimulation modalities below this frequency are in the low frequency range, and their safety and efficacy are unclear. Traditional medium-frequency electrical stimulation therapy equipment generally requires an external power supply for power supply in order to achieve the above-mentioned working standards of frequency output, and cannot achieve a small and portable wearable design. The use of built-in battery power supply can realize the miniaturization of the equipment, but its discharge efficiency is much lower than that of the external power supply mode, and it is difficult to achieve a working state that meets the medium frequency treatment range and can maintain continuous output. Therefore, how to design a small, portable, low-cost medium-frequency electrical stimulation therapy device that can be powered by batteries and meet the needs of clinical applications is a technical problem that needs to be solved.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a small, portable and low-cost portable intermediate frequency therapeutic apparatus.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:

A portable intermediate frequency therapeutic apparatus, comprising a casing and a skin contact part connected with the casing through a wire, an electrode sheet is arranged on the skin contact part, a power supply and an MCU chip are arranged in the casing, and the casing is There is a control switch on it, one output end of the power supply supplies power to the MCU chip, and the other way is connected to the electrode sheet through a boost circuit and a pulse modulation circuit, and the control terminals of the boost circuit and the pulse modulation circuit are both connected To the MCU chip, the MCU chip is also connected with a communication chip for communicating with external devices, wherein the power supply is a built-in battery, and the boost circuit is an inductive boost circuit.

Further, the skin contact component includes an insulating sheet base layer, the upper surface of the insulating sheet base layer is provided with a non-woven layer, the lower surface is provided with a conductive silica gel layer, and the electrode sheet is provided on the insulating sheet base layer and the conductive silica gel layer. Between the layers, between the base layer of the insulating sheet and the conductive silica gel layer, a temperature and humidity sensor is arranged around the electrode sheet, the conductive silica gel layer is provided with a vertical through hole, and the temperature and humidity sensor is located in the vertical direction. in the through hole or corresponding to the vertical through hole; the signal output end of the temperature and humidity sensor is connected to the MCU chip.

Further, a cavity is provided in the middle of the conductive silica gel layer, and a support column is provided in the cavity.

Further, a side surface of the conductive silica gel layer is provided with a through hole communicating with the cavity.

Further, a voltage regulator circuit is arranged between the power supply and the MCU chip, and the MCU chip is also connected with a memory.

Further, the casing is arranged on the upper part of the skin contacting member, and is integrally structured with the skin contacting member, and a buckle strap is provided on both sides of the casing.

Further, the output end of the boost circuit is also connected to the MCU chip.

Further, the electrode sheets are arranged in pairs, and the pulse modulation circuit includes a first NPN type triode, a second NPN type triode, a first PNP type triode and a second PNP type triode, wherein:

The base of the first NPN transistor is connected to a signal output terminal of the MCU chip through a resistor, the emitter is grounded, the collector is connected to the output terminal of the booster circuit through a resistor, and the other is connected to the output terminal of the booster circuit through a resistor. the base of the first NPN transistor;

The base of the first PNP transistor is connected to the collector of the second NPN transistor through a resistor, the emitter is connected to the output end of the boost circuit, and the collector is connected to the collector of the first NPN transistor and supplying power to one of the electrode pads arranged in pairs;

The base of the second NPN transistor is connected to another signal output end of the MCU chip through a resistor, the emitter is grounded, the collector is connected to the output end of the boost circuit through a resistor, and the other is connected through a resistor. to the base of the second NPN transistor;

The base of the second PNP transistor is connected to the collector of the first NPN transistor through a resistor, the emitter is connected to the output end of the boost circuit, and the collector is connected to the collector of the second NPN transistor. Power is supplied to the other electrode pad of the paired electrode pads.

Further, the portable intermediate frequency therapeutic apparatus outputs a modulated intermediate frequency signal, and the modulated intermediate frequency signal is a modulated wave with a low frequency frequency range of 1-100 Hz and an intermediate frequency frequency range of 1K-3KHz; and the pulse width is 5us～200us, and the waveform The interval is 10us～100us, and every 10ms～1000ms is the gap for output.

Further, a signal output end of the MCU chip first continuously outputs two square waves with a pulse width of 75us and an interval of 75us, and then no output for 10 ms; the other signal output end of the MCU chip lags behind the A signal output terminal 75us of the MCU chip first continuously outputs three square waves with a pulse width of 75us and an interval of 75us, and then there is no output for 10 ms.

The present invention has the following beneficial effects:

The invention adopts built-in battery power supply and inductive boost circuit to realize the miniaturization of the equipment, and cooperates with the pulse modulation circuit to realize the discharge frequency in the range of 1-100KHz and the sustainable and stable output, which meets the clinical application requirements. The present invention can miniaturize the volume of the main body of the medium-frequency electrical stimulation therapy device, and the size can be controlled within 10 cm in length, 5 cm in width, and 2 cm in height or smaller. The invention can greatly improve the convenience of the device, allow the user to carry it with him, use it in time when needed, and reduce the production and purchase costs. Therefore, the portable intermediate frequency therapeutic apparatus of the present invention is small, portable and low in cost.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the portable intermediate frequency therapeutic apparatus of the present invention;

2 is a schematic diagram of the separation structure of the skin-contacting components of the portable intermediate frequency therapeutic apparatus shown in FIG. 1 , wherein (a), (b), and (c) are respectively the structure diagrams of three embodiments;

FIG. 3 is a schematic diagram of the circuit connection in the casing of the portable intermediate frequency therapeutic apparatus shown in FIG. 1;

Figure 4 is a schematic diagram of the use state of the portable intermediate frequency therapeutic apparatus shown in Figure 1, wherein (a) is a schematic diagram of the front of the user's lower limbs, (b) is a schematic diagram of the back of the user's lower limbs, and (c) is a schematic diagram of the side of the user's lower limbs;

FIG. 5 is a schematic diagram of the circuit structure of the pulse modulation circuit in FIG. 3 .

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

An embodiment of the present invention provides a portable intermediate frequency therapeutic apparatus, as shown in Figures 1-3, comprising a casing 1 and a skin contact part 2 connected to the casing 1 through a wire 3, and the skin contact part 2 is provided with an electrode sheet 24, in:

A power supply 11 and an MCU (Micro Control Unit, microcontroller unit) chip 12 are arranged in the housing 1, and a control switch (not shown) is arranged on the housing 1. The output end of the power supply 11 supplies power to the MCU chip 12, and another One way is connected to the electrode sheet 24 via the boost circuit 13 and the pulse modulation circuit 14, the control terminals of the boost circuit 13 and the pulse modulation circuit 14 are both connected to the MCU chip 12, and the MCU chip 12 is also connected with an external device (such as a mobile phone). , remote control, etc.) communication chip 15;

The power supply 11 is a built-in battery (lithium battery can be used), which avoids the inconvenience caused by external AC power (room power), and is safer and more reliable;

The booster circuit 13 is used to boost the lower voltage provided by the built-in battery to a higher voltage (for example, above 75V) as required. It is an inductive booster circuit, which effectively avoids the use of transformer booster for similar intermediate frequency instruments in the current market. The problems of large size and heavy weight brought about by the portable device achieve the purpose of portability and greatly reduce the cost; the inductive boost circuit is a common knowledge in the field, for example, please refer to the link: Inductive DC Boost Circuit, http://m .elecfans.com/article/949468.html, so it will not be described in detail in this application;

The pulse modulation circuit 14 is used to modulate the high-voltage signal boosted by the booster circuit 13 into a desired pulse waveform according to the input control signal, which can be designed by referring to common knowledge in the art, or can also adopt the specific circuit form described later. ;

The housing 1 may be connected with a plurality of skin-contacting components 2 to simultaneously perform electrical stimulation on the patient's skin at multiple locations.

When the portable intermediate frequency therapeutic apparatus of the embodiment of the present invention is used, the skin contact component is attached to the skin surface of the middle segment of the target exercised muscle (for example, it can be located on the front and back sides of the calf as shown in Figure 4(a)-(c), or it can be located on the calf. side up and down), turn on the switch, according to the preset electrical stimulation program (voltage, pulse period, amplitude, duty cycle and other parameters are preset or flexibly adjusted as needed), use pulse voltage to transdermally stimulate muscles or nerves. Electric stimulation, promotes passive muscle contraction, and achieves the purpose of electric stimulation to treat diseases. For example, it can promote the secretion of endorphins in the body to achieve analgesic effect. This product is also very suitable for postoperative patients to wear for prevention or rehabilitation training, which can greatly shorten the rehabilitation period. It can improve the effect of postoperative rehabilitation training, help patients get rid of pain more quickly, and reduce the risk of postoperative complications.

The inventor's research has found that through reasonable settings of electrical stimulation intensity and frequency, it can produce rhythmic excitation on muscle motor neurons and stimulate the active contraction of limb muscles. For example, the portable intermediate frequency therapeutic apparatus of the present invention can be applied to thromboprophylaxis of patients after orthopaedic surgery. For such patients, muscle electrical stimulation is used to achieve overall active contraction of local muscles (such as the gastrocnemius muscle at the distal end of the lower limb) to increase venous blood flow. It can improve the stasis state of venous blood flow, thereby reducing the risk of venous thrombosis in postoperative patients. Compared with traditional mechanical preventive measures (plantar venous pump, step-by-step compression stockings, etc.), electrical stimulation prevention can be adjusted according to different parts or the patient's constitution, according to the coagulation state obtained by the doctor's experience and clinical examination, by adjusting the electrical stimulation parameters. It is more flexible to set a personalized preventive treatment plan, and it is also more convenient for the long-term prevention of patients after discharge. Its efficacy, safety and economy are better than conventional preventive treatment, and it is more suitable for elderly patients.

The advantages of the embodiments of the present invention are:

1. The present invention adopts built-in battery power supply and inductive boost circuit to realize the miniaturization of the equipment, and cooperates with the pulse modulation circuit to realize the discharge frequency in the range of 1-100KHz (that is, it can reach the range of medium frequency treatment) and is sustainable and stable The output meets the needs of clinical applications.

2. The present invention can miniaturize the volume of the main body of the medium-frequency electrical stimulation therapy device, and the size can be controlled within 10 cm in length, 5 cm in width, and 2 cm in height or smaller. The invention can greatly improve the convenience of the device, allow the user to carry it with him, use it in time when needed, and reduce the production and purchase costs.

3. The MCU chip can use ultra-low power consumption chips to reduce power consumption. The built-in battery can work for a long time by using a commonly used rechargeable lithium battery, so that the overall equipment can continue to work for 6 hours, and the power consumption is almost similar to that of low-frequency instruments. It solves the main problem that the industry has been using AC power supply and cannot be portable.

4. The MCU chip can communicate with external devices such as handheld devices, so as to collect data and facilitate the remote collection of training effects. Combined with diagnostic equipment, the effect of rehabilitation training can be evaluated.

To sum up, the portable intermediate frequency therapeutic apparatus of the embodiment of the present invention is small, portable and low in cost.

As shown in FIG. 2, preferably, the skin contact member 2 may include an insulating sheet base layer 22, the upper surface of the insulating sheet base layer 22 is provided with a non-woven layer 21, the lower surface is provided with a conductive silica gel layer 23, and the electrode sheet 24 is provided on the insulating sheet. Between the base layer 22 and the conductive silica gel layer 23, and between the base layer 22 of the insulating sheet and the conductive silica gel layer 23, a temperature and humidity sensor 25 is arranged around the electrode sheet 24, and the conductive silica gel layer 23 is provided with a vertical through hole 231. The temperature and humidity sensor 25 is located in the vertical through hole 231 or corresponds to the vertical through hole 231; the signal output end of the temperature and humidity sensor 25 is connected to the MCU chip 12, and the temperature and humidity sensor 25 can be a temperature sensor and a humidity sensor set separately, or both One-piece sensor. The advantages of the skin contact part 2 being set up in this way are: on the one hand, a temperature and humidity sensor is provided, which can collect the temperature and humidity of the skin surface and inform the MCU chip, and then adjust the boost circuit and the pulse modulation circuit to perform voltage compensation, so that the muscles The sensed voltage is relatively consistent, and the temperature and humidity data can also be used as a basis for evaluating the training effect; on the other hand, in order to improve the accuracy of temperature and humidity collection, the conductive silicone layer is provided with vertical through holes, due to the existence of vertical through holes , which can accurately detect the temperature and humidity data on the skin surface without affecting the training effect.

As shown in FIG. 2( a ), for the convenience of fixing, the electrode sheet 24 and the temperature and humidity sensor 25 can be embedded in the base layer 22 of the insulating sheet, or they can be separately set as shown in FIG. replace. As shown in FIG. 2( c ), a cavity 232 may be provided in the middle of the conductive silicone layer 23 , and a plurality of support columns 233 are provided in the cavity 232 . The accuracy of the data can be improved by comparing and correcting the data collected by the multiple temperature and humidity sensors 25; moreover, the side surface of the conductive silicone layer 23 can be provided with a through hole 234 that communicates with the cavity 232, and the through hole 234 can The cavity 232 is communicated with the external environment, so that the hot air/moisture on the surface of the skin at the training site diffuses outward, and further improves the accuracy of the data collected by the temperature and humidity sensor 25 .

As shown in FIG. 3 , a voltage stabilizing circuit 16 may be provided between the power supply 11 and the MCU chip 12 to improve the stability of the MCU chip 12. The design of the voltage stabilizing circuit 16 can refer to common knowledge in the art, and will not be repeated here. ; and the MCU chip 12 can also be connected with a memory 17 to conveniently store a preset electrical stimulation scheme, and can also download a scheme in an external device and control it according to the scheme.

In order to further improve portability, the housing 1 can be arranged on the upper part of the skin contact member 2 and is integrally structured with the skin contact member 2 . At this time, the two sides of the housing 1 may also be provided with a buckle strap, so as to facilitate fixing the entire device on the skin to be electrically stimulated.

In addition, an LED indicator light may be provided on the housing 1 to indicate the current working state. The housing 1 may also be provided with an audible and visual alarm device to give an alarm prompt at a necessary time point such as completion of electrical stimulation. In order to improve the human-computer interaction experience, a display screen may be provided on the casing 1 . The communication chip 15 can adopt WIFI or Bluetooth communication methods commonly used in the field. When in use, the user can adjust the working mode and working intensity through the buttons on the device or an external wireless control device. Program control: open wireless (such as Bluetooth), open WeChat login applet, connect to the device through Bluetooth, there is a set exercise program on the mobile phone, you can use it directly, or you can set your own suitable rehabilitation according to your own situation through the doctor's suggestion programs for better recovery. The mobile phone can obtain the predetermined pulse voltage scheme through the database in the cloud.

In the embodiment of the present invention, the output end of the booster circuit 13 may also be connected to the MCU chip 12, and as a voltage feedback signal, the MCU chip 12 can compare the voltage feedback signal with a preset voltage after collecting the voltage feedback signal, and adjust the output as required The size of the voltage to ensure the stability of the voltage, avoid electric shocks, and ensure safe and comfortable use.

In the embodiment of the present invention, the pulse modulation circuit 14 is used to modulate the high voltage signal boosted by the booster circuit 13 into a desired pulse waveform according to the input control signal, preferably the following circuit form is used:

As shown in FIG. 5 , the electrode sheets 24 are arranged in pairs, including an electrode sheet A and an electrode sheet B. Specifically, each skin contact member 2 may be provided with only one electrode sheet, that is, the skin contact member 2 and the electrode sheet 24 may be One-to-one correspondence, at this time, the skin contact parts 2 are also arranged in pairs;

The pulse modulation circuit 14 includes a first NPN transistor Q2, a second NPN transistor Q3, a first PNP transistor Q4 and a second PNP transistor Q5, wherein:

The base of the first NPN transistor Q2 is connected to a signal output terminal IO1 of the MCU chip 12 through the resistor R12, the emitter is grounded, and the collector is connected to the output terminal VH of the booster circuit 13 through the resistor R11 (here is the booster circuit). The high-voltage signal after the circuit 13 is boosted), and the other is connected to the base of the first NPN transistor Q2 after passing through the resistor R22;

The base of the first PNP transistor Q4 is connected to the collector of the second NPN transistor Q3 through the resistor R15, the emitter is connected to the output terminal VH of the booster circuit 13, and the collector is connected to the collector of the first NPN transistor Q2 and is formed. Power supply to one of the set electrode sheets (that is, to supply power to electrode sheet A as VH1);

The base of the second NPN transistor Q3 is connected to the other signal output terminal IO2 of the MCU chip 12 through the resistor R13, the emitter is grounded, the collector is connected to the output terminal VH of the boost circuit 13 through the resistor R14, and the other is connected to the output terminal VH of the booster circuit 13 through the resistor R23. and then connected to the base of the second NPN transistor Q3;

The base of the second PNP transistor Q5 is connected to the collector of the first NPN transistor Q2 through the resistor R16, the emitter is connected to the output terminal VH of the booster circuit 13, and the collector is connected to the collector of the second NPN transistor Q3 and is a Power is supplied to the other electrode sheet among the set electrode sheets (ie, to supply power to electrode sheet B as VH2).

In this circuit, the high-voltage part is independently generated and controlled by the booster circuit 13, and the MCU chip 12 generates control signals IO1 and IO2 (specifically, square wave signals) to control the pulse modulation circuit 14, so as to boost the voltage of the booster circuit 13. The high-voltage signal is modulated to form an intermediate-frequency electrical pulse signal with therapeutic effects.

Because the bipolarity of the intermediate frequency wave has a strong stimulating and therapeutic effect, the ordinary treatment is realized by controlling the transformer, which not only causes the waveform to be unstable but also easily increases the power consumption. In the prior art, an external power supply is required for power supply. This embodiment innovatively solves this problem. The NPN and PNP transistors are controlled by the level of the IO (IO1, IO2) of the MCU chip to realize the reverse of the high voltage (the polarity of the electrodes is reversed), that is, if there is AB in the design Two electrode pads can realize that when the output of electrode pad A is high voltage, electrode pad B is ground (it should be noted that the ground is not grounded on the circuit board, but is relatively ground), when electrode pad B is high voltage , the electrode pad A is the ground, which solves the problem of unstable signal and high power consumption caused by the use of the transformer; the electrode polarity of the electrode pad is reversed, which not only saves the cost, but also ensures that the stimulation intensity of the two electrodes is the same, and the electrode polarity is reversed. The non-traditional transformer circuit can greatly reduce the power loss caused by the polarity reversal compared to the prior art method of connecting one of the electrode pads to the ground terminal of the circuit board.

In the embodiment of the present invention, preferably, the portable intermediate frequency therapeutic apparatus outputs a modulated intermediate frequency signal, and the modulated intermediate frequency signal is a modulated wave with a low frequency frequency range of 1-100 Hz and an intermediate frequency frequency range of 1K-3KHz; and the pulse width is 5us ~200us, the waveform interval is 10us ~ 100us, and output is performed every 10ms ~ 1000ms as a gap. During the research, the inventor found that the low-frequency signal has the effects of relieving pain, promoting blood circulation, muscle contraction, etc., and the intermediate-frequency signal has the effects of large stimulation depth and weak surface pain, which is better than the low-frequency treatment effect and intensity; The newly designed modulated intermediate frequency signal/intermediate frequency wave has both low frequency part and intermediate frequency part. It has the advantages of low frequency treatment and deep treatment depth of intermediate frequency. It has better stimulation effect and better treatment than similar products on the market. It is effective; and the problem of power consumption of the common intermediate frequency therapeutic apparatus is solved, and the power consumption is greatly reduced.

Specifically, taking an intermediate frequency wave with analgesic effect as an example, combined with the circuit shown in FIG. 5, the following steps can be used to modulate the intermediate frequency wave:

a) Let IO1 continuously output 2 square waves with a pulse width of 75us and an interval of 75us; IO2 is 75us behind IO1 and output 3 square waves with a pulse width of 75us and an interval of 75us. At this time, the terminal output waveforms of the electrode pads are IO1 and The waveform after the addition of IO2 is composed of 5 square waves with a pulse width of 75us. At this time, the formula f _{intermediate frequency} = 1-100KHz, f _{intermediate frequency} = 1/T _{intermediate frequency} can be obtained as 6.667KHz, which is the intermediate frequency mode;

b) After completion, IO1 has no output for 10 ms, and IO2 is 75us behind IO1 without output for 10 ms. At this time, the terminal output waveform of the electrode pad is the waveform after the addition of IO1 and IO2, that is, the intermediate frequency and the It is composed of waveforms with no output for 10ms, forming a low frequency mode with intermittent output of intermediate frequency. According to the formula f _{low frequency} = 0.1-100Hz, f _{low frequency} = 1/T _{low frequency} can be obtained as 93 Hz, which is a low frequency mode.

It can be seen from Figure 5 that the inversion of the electrode sheet voltage and electrode is controlled by IO1 and IO2. Specifically, if IO1 is at a high level and IO2 is at a low level, then Q2 turns on and Q3 turns off. It is turned on and Q3 is turned off, so that Q5 is also turned off. At this time, electrode A is in a high voltage state, and electrode pad B is in a low voltage state; if IO1 is low and IO2 is high, then Q2 is turned off and Q3 is turned on, because Q2 is turned off. Turn off Q4, turn on Q3, and turn on Q5. At this time, the electrode sheet A is in a low voltage state, and the electrode sheet B is in a high voltage state; thus, the voltage reversal of the electrode sheet is completed, so that the electrode sheet can output bipolar signals ; When not in use, IO1 and IO2 are set to low level, so that the voltage output can be turned off. It can be understood that those skilled in the art can also design other modulated intermediate frequency signals having both a low frequency part and an intermediate frequency part according to the needs and in combination with the working principle of the circuit shown in FIG. 5 .

The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. a portable intermediate frequency therapeutic instrument, comprising a casing and a skin contact part connected by a wire with the casing, an electrode sheet is provided on the skin contact part, and it is characterized in that, a power supply and an MCU are provided in the casing A control switch is arranged on the casing, and one output end of the power supply supplies power to the MCU chip, and the other is connected to the electrode sheet through a boost circuit and a pulse modulation circuit. The boost circuit and pulse modulation The control ends of the circuits are all connected to the MCU chip, and the MCU chip is also connected to a communication chip for communicating with external devices, wherein the power supply is a built-in battery, and the boost circuit is an inductive boost circuit. 2 . The portable intermediate frequency therapeutic apparatus according to claim 1 , wherein the skin contact component comprises an insulating sheet base layer, the upper surface of the insulating sheet base layer is provided with a non-woven fabric layer, and the lower surface is provided with a conductive silica gel layer. 3 . , the electrode sheet is arranged between the base layer of the insulating sheet and the conductive silica gel layer, a temperature and humidity sensor is arranged around the electrode sheet between the base layer of the insulating sheet and the conductive silica gel layer, and the conductive silica gel layer is provided with a temperature and humidity sensor. A vertical through hole, the temperature and humidity sensor is located in the vertical through hole or corresponds to the vertical through hole; the signal output end of the temperature and humidity sensor is connected to the MCU chip. 3 . The portable intermediate frequency therapeutic apparatus according to claim 2 , wherein a cavity is provided in the middle of the conductive silica gel layer, and a support column is provided in the cavity. 4 . 4 . The portable intermediate frequency therapeutic apparatus according to claim 3 , wherein a side surface of the conductive silicone layer is provided with a through hole communicating with the cavity. 5 . 5 . The portable intermediate frequency therapeutic apparatus according to claim 1 , wherein a voltage stabilizing circuit is arranged between the power supply and the MCU chip, and the MCU chip is further connected with a memory. 6 . 6 . The portable intermediate frequency therapeutic apparatus according to claim 1 , wherein the casing is arranged on the upper part of the skin contact member, and is integrally formed with the skin contact member, and both sides of the casing are arranged Has buckle straps. 7 . The portable intermediate frequency therapeutic apparatus according to claim 1 , wherein the output end of the booster circuit is further connected to the MCU chip. 8 . 8. The portable intermediate frequency therapeutic apparatus according to any one of claims 1-7, wherein the electrode pads are arranged in pairs, and the pulse modulation circuit comprises a first NPN type triode, a second NPN type triode, a third A PNP-type triode and a second PNP-type triode, wherein: The base of the first NPN transistor is connected to a signal output terminal of the MCU chip through a resistor, the emitter is grounded, the collector is connected to the output terminal of the booster circuit through a resistor, and the other is connected to the output terminal of the booster circuit through a resistor. the base of the first NPN transistor; The base of the first PNP transistor is connected to the collector of the second NPN transistor through a resistor, the emitter is connected to the output end of the boost circuit, and the collector is connected to the collector of the first NPN transistor and supplying power to one of the electrode pads arranged in pairs; The base of the second NPN transistor is connected to another signal output end of the MCU chip through a resistor, the emitter is grounded, the collector is connected to the output end of the boost circuit through a resistor, and the other is connected through a resistor. to the base of the second NPN transistor; The base of the second PNP transistor is connected to the collector of the first NPN transistor through a resistor, the emitter is connected to the output end of the boost circuit, and the collector is connected to the collector of the second NPN transistor. Power is supplied to the other electrode pad of the paired electrode pads. 9. The portable intermediate frequency therapeutic apparatus according to claim 8, wherein the portable intermediate frequency therapeutic apparatus outputs a modulated intermediate frequency signal, and the modulated intermediate frequency signal is a low frequency frequency range of 1-100Hz, and an intermediate frequency frequency range of 1K-3KHz and the pulse width is 5us～200us, the waveform interval is 10us～100us, and output is performed every 10ms～1000ms as a gap. 10. The portable intermediate frequency therapeutic apparatus according to claim 8, wherein a signal output end of the MCU chip first continuously outputs 2 square waves with a pulse width of 75us and an interval of 75us, and then there is no output of 10 square waves. ms; the other signal output terminal of the MCU chip is 75us behind the one signal output terminal of the MCU chip, firstly outputs three square waves with a pulse width of 75us and an interval of 75us, and then no output for 10 ms.

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