Low-frequency electrical stimulator

Abstract

The utility model provides a low-frequency electrical stimulator, which comprises a main control board, a touch display screen, mechanical keys, electrode wires and a lithium battery module, and is characterized in that the main control board is respectively connected with the touch display screen, the mechanical keys, the electrode wires and the lithium battery module; the main control board is used for outputting low-frequency current through the electrode wire, communicating with the touch display screen, performing battery charging management and performing load detection; the electrode wire is used for outputting low-frequency current and inputting a load detection signal to the main control board; the mechanical key is used for setting parameters; the touch display screen is used for selecting prescriptions, setting parameters and displaying the working state of the instrument. The utility model has no professional requirement on the user of the instrument, is very simple and convenient to use, has small volume and light weight, and can be carried about.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, and specifically relates to a low-frequency electrical stimulator. Background Art

[0002] Existing electrical stimulators usually include a main unit and electrode cables. When using the device, patients need professional medical workers to operate the device and set the various parameters of the device according to the patient's injury or illness symptoms. Different parameters meet different indications or effective treatments at different stages of disease development. Existing technical solutions generally include low-frequency electrical stimulation, medium-frequency electrical stimulation, or a combination of the two. This technology is widely used and commonly used in clinical practice. It is generally powered by AC power. The parameter requirements and standards meet the requirements of national and industry standards.

[0003] The disadvantages of the existing technology are mainly divided into two aspects: Disadvantage 1: The operator is generally a medical worker with clinical practice experience, who is familiar with the various parameters of the equipment, has a more accurate judgment of different indications or stages of disease development, and operates the frequency band, current intensity, treatment time, etc. of the instrument. Therefore, there are higher requirements for the user of the instrument. Disadvantage 2: At present, most of the instruments are powered by AC power, and the instrument structure is mainly desktop or vertical, with a large body, which is not convenient to carry and transport. Utility Model Content

[0004] The embodiment of the present application provides a low-frequency electrical stimulator, including: a main control board, a touch display screen, a mechanical button, an electrode line, and a lithium battery module, wherein the main control board is respectively connected to the touch display screen, the mechanical button, the electrode line, and the lithium battery module, and the main control board outputs a low-frequency current through the electrode line, and the electrode line inputs a load detection signal to the main control board; the main control board includes a main control chip, a pin 11 of the main control chip is connected to one end of a resistor R1, the other end of the resistor R1 is connected to the base of a transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of a transistor Q4, the emitter of the transistor Q4 is connected to one end of a resistor R6, the collector of the transistor Q4, one end of the resistor R6, and the drain of the transistor Q6 are all connected to an output port 2, The gate of transistor Q6 is connected to one end of resistor R7 and one end of resistor R8 respectively, and the other end of resistor R8 is grounded; pin 9 of the main control chip is connected to one end of resistor R10, the other end of resistor R10 is connected to the base of transistor Q1, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to one end of resistor R11, the other end of resistor R11 is connected to the base of transistor Q3, the emitter of transistor Q3 is connected to one end of resistor R5 and the emitter of transistor Q4, the collector of transistor Q3 is connected to the other end of resistor R5, output port 1, and the drain of transistor Q5, the gate of transistor Q5 is connected to one end of resistor R3 and one end of resistor R4, the other end of resistor R4 is grounded, the source of transistor Q5 and the source of transistor Q6 are both connected to one end of resistor R9, and the other end of resistor R9 is grounded.

[0005] Wherein, the low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sine wave.

[0006] Wherein, the low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a square wave.

[0007] The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, the modulation wave is a sawtooth wave, and the fixed pulse width is 100 μs.

[0008] The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, the modulation wave is a sawtooth wave, and the pulse width gradually changes within the range of 200 to 400 μs.

[0009] Wherein, the low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sine wave and an exponential wave.

[0010] The low-frequency electrical stimulator of the present application embodiment has the following beneficial effects:

[0011] The low-frequency electrical stimulator of the present application does not require complicated settings of instrument parameters during operation, is easy to use, and has a small size, light weight, and can be carried around. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a circuit diagram of a low-frequency electrical stimulator system according to an embodiment of the present application;

[0013] Figure 2 This is a schematic diagram of the structure of the low-frequency electrical stimulator system in the embodiment of the present application;

[0014] Figure 3 This is a structural diagram of the main control chip in the embodiment of this application;

[0015] Figure 4 This is a diagram of the output circuit structure in the embodiment of the present application;

[0016] Figure 5 This is the waveform diagram of prescription 1;

[0017] Figure 6 This is the waveform diagram of prescription 2;

[0018] Figure 7 This is the waveform diagram of prescription 3;

[0019] Figure 8 This is the waveform diagram of prescription 4;

[0020] Figure 9a It is a schematic diagram of a sine wave;

[0021] Figure 9b It is a schematic diagram of exponential wave;

[0022] Fig.10 This is a program flow chart of the low-frequency electrical stimulator according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0024] The following description provides multiple embodiments of the utility model, and different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of features A, B, C, and D, even though the embodiment may not be clearly recorded in the following text.

[0025] During daily military training and field missions, soldiers of the military and armed police will suffer from various injuries and skin trauma. In order to solve the pain and analgesia problems caused by accidental injuries and training injuries, as well as auxiliary treatment during rehabilitation, a portable instrument is needed to meet the following requirements: Form emergency response technology: acupoint analgesia, anti-fatigue, anti-muscle spasm, refreshing, and can be applied to the prevention and treatment of military training injuries. By combining traditional Chinese medicine acupoints with electrical stimulation treatment technology, the invasiveness of acupuncture is avoided, and it is safe, easy to operate and easy to carry. Applied to the military emergency response technology: acupoint analgesia, relieve fatigue, muscle spasm, and have the function of refreshing.

[0026] Principle of electrical stimulation: A method of using low-frequency pulse current to stimulate nerves or muscles to contract in order to restore their motor function. This method is mainly used to stimulate denervated muscles, spastic muscles and smooth muscles, and can also be used to treat disuse muscle atrophy.

[0027] Definitions of Abbreviations and Key Terms:

[0028] Low-frequency electrical stimulation: The method of treating diseases by using electric current with a frequency below 1000Hz is called low-frequency electrical stimulation therapy, which can be used to treat acute and chronic pain.

[0029] Controller: The main control circuit board of the low-frequency electrical stimulator, whose functions include controlling the display content of the LCD screen, controlling the charging process of the built-in battery, controlling the size and frequency of the output current, displaying the working status of the instrument, detecting faults and issuing alarms, etc.

[0030] Prescription: Output specific low-frequency electrical stimulation waveforms for different indications.

[0031] Load detection: refers to the process in which the patient stops the current output due to accidental detachment of the electrode during the use of low-frequency electrical stimulation, to prevent the sudden change of current from causing accidental harm to the patient.

[0032] like Figure 1-2 As shown, the low-frequency electrical stimulator of the present application includes: a main control board 101, a touch screen 102, a mechanical button 103, an electrode line 104, and a lithium battery module 105. The main control board 101 is connected to the touch screen 102, the mechanical button 103, the electrode line 104, and the lithium battery module 105 respectively. The main control board 101 is used for: outputting low-frequency current through the electrode line 104, communicating with the touch screen, battery charging management and load detection. The electrode line 104 is used to output low-frequency current and input load detection signals to the main control board 101. The mechanical button 103 is used to set parameters. The touch screen 102 is, for example, a true color liquid crystal touch screen, which is used to select prescriptions, set parameters, and display the working status of the instrument.

[0033] Combined with the relevant characteristics and defects of existing electrical stimulation instruments and technologies, this application mainly solves the following problems: the operator is not required to be a medical worker with clinical practice experience, is not required to be familiar with the various parameters of the equipment, and is not required to have a more accurate judgment of different indications or stages of disease development. The frequency band, current intensity, treatment time, etc. of the operating instrument have been designed in the embedded software, and the user can directly operate and select. Therefore, there are no professional requirements for the user of the instrument. The internal prescriptions are: Prescription 1: Acute pain; Prescription 2: Chronic pain; Prescription 3: Relieve fatigue; Prescription 4: Relieve muscle spasms: Prescription 5: Refresh the mind.

[0034] The structure of the utility model instrument: handheld, including the host and electrode wire, small size, light weight, can be carried around, and has IP21 waterproof function, shockproof function, and multiple operation modes of touch and key. Power supply: built-in polymer battery, rechargeable and cyclical, continuous use for more than 6 hours after a single charge. It can standby for a long time, suitable for treatment in natural environment and field environment in peacetime and wartime.

[0035] like Figure 1-4 As shown, the main control board includes a main control chip, a pin 11 of the main control chip is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of the transistor Q4, the emitter of the transistor Q4 is connected to one end of the resistor R6, the collector of the transistor Q4, one end of the resistor R6, and the drain of the transistor Q6 are all connected to the output port 2, the gate of the transistor Q6 is respectively connected to one end of the resistor R7 and one end of the resistor R8, and the other end of the resistor R8 is grounded; the pin 9 of the main control chip is connected to one end of the resistor R10 The other end of the resistor R10 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the base of the transistor Q3, the emitter of the transistor Q3 is connected to one end of the resistor R5 and the emitter of the transistor Q4, the collector of the transistor Q3 is connected to the other end of the resistor R5, the output port 1, and the drain of the transistor Q5, the gate of the transistor Q5 is connected to one end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is grounded, the source of the transistor Q5 and the source of the transistor Q6 are both connected to one end of the resistor R9, and the other end of the resistor R9 is grounded.

[0036] The controller scheme for implementing the utility model mainly includes: 1. Hardware circuit part; 2. Embedded software. The functions of the hardware circuit part mainly include:

[0037] 1. Control the display content of the LCD screen. Establish serial port communication with the touch screen through the main control CPU to switch and display the LCD display content.

[0038] 2. Control the charging process of the built-in battery. The built-in battery capacity is 5000mAH. The device cannot be used during charging. And when it is fully charged, the green indicator light will be on.

[0039] 3. Output specific low-frequency electrical stimulation waveforms for different indications. Each prescription outputs a specific band of electrical stimulation current according to different indications and uses.

[0040] Output waveform: Figure 5 As shown in the figure, prescription 1: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sine wave. Figure 6 As shown in the figure, prescription 2: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a square wave. Figure 7 As shown in the figure, prescription 3: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sawtooth wave. The fixed pulse width is 100μs. Figure 8 As shown in the figure, prescription 4: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sawtooth wave. The pulse width changes gradually within the range of 200 to 400 μs. Figure 9a-9b As shown, Prescription 5: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sine wave and an exponential wave.

[0041] like Fig.10 As shown, the embedded software functions mainly include:

[0042] 1. The software operation UI is simple in design and flexible in operation. It can be used in conjunction with the mechanical buttons at the bottom of the instrument.

[0043] 2. Display the working status of the instrument, detect faults and give alarms, etc.

[0044] 3. Load detection: refers to the process in which the patient uses low-frequency electrical stimulation and stops the current output due to the accidental detachment of the electrode sheet to prevent the patient from being accidentally injured by the sudden change of current.

[0045] The technical innovation of this utility model includes the portability of the controller prescription part and the instrument structure. The instrument controller has multiple prescription modes built in, that is, the operation does not require cumbersome setting of instrument parameters. According to the different prescriptions set, the current of different frequency bands is output. There are many types of output waveforms, including sawtooth wave, sine wave, exponential wave, etc.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-frequency electrical stimulator, characterized in that: include: A main control board, a touch display screen, a mechanical button, an electrode line, and a lithium battery module. The main control board is respectively connected to the touch display screen, the mechanical button, the electrode line, and the lithium battery module. The main control board outputs a low-frequency current through the electrode line, and the electrode line inputs a load detection signal to the main control board; the main control board includes a main control chip, a pin 11 of the main control chip is connected to one end of a resistor R1, the other end of the resistor R1 is connected to the base of a transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the base of a transistor Q4, the emitter of the transistor Q4 is connected to one end of a resistor R6, the collector of the transistor Q4, one end of the resistor R6, and the drain of the transistor Q6 are all connected to the output port 2, and the gate of the transistor Q6 is respectively connected to One end of the resistor R7 and one end of the resistor R8 are connected, and the other end of the resistor R8 is grounded; pin 9 of the main control chip is connected to one end of the resistor R10, the other end of the resistor R10 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to the base of the transistor Q3, the emitter of the transistor Q3 is connected to one end of the resistor R5 and the emitter of the transistor Q4, the collector of the transistor Q3 is connected to the other end of the resistor R5, the output port 1, and the drain of the transistor Q5, the gate of the transistor Q5 is connected to one end of the resistor R3 and one end of the resistor R4, the other end of the resistor R4 is grounded, the source of the transistor Q5 and the source of the transistor Q6 are both connected to one end of the resistor R9, and the other end of the resistor R9 is grounded.

2. The low-frequency electrical stimulator according to claim 1, characterized in that: The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sine wave.

3. The low-frequency electrical stimulator according to claim 1 or 2, characterized in that: The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a square wave.

4. The low-frequency electrical stimulator according to claim 1 or 2, characterized in that: The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, the modulation wave is a sawtooth wave, and the fixed pulse width is 100μs.

5. The low-frequency electrical stimulator according to claim 1 or 2, characterized in that: The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, the modulation wave is a sawtooth wave, and the pulse width changes gradually within the range of 200 to 400 μs.

6. The low-frequency electrical stimulator according to claim 1 or 2, characterized in that: The low-frequency current output by the main control board through the electrode line includes: the pulse waveform is a bidirectional symmetrical square wave, and the modulation wave is a sine wave and an exponential wave.

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