Electric stabbing ankle and foot therapeutic apparatus with multi-channel electrode

Abstract

The utility model discloses an electric-stabbing ankle-foot therapeutic apparatus with multichannel electrodes, which comprises a microprocessor, a power supply module, a conductive adhesive substrate sheet for arranging a plurality of electrode sheets, and a man-machine interaction module in communication connection with the microprocessor, the signal output end of the microprocessor is electrically connected with an electrode slice on the conductive adhesive substrate slice through a signal conditioning circuit, the signal conditioning circuit comprises a D / A converter and a signal amplification circuit, and the signal output end of the microprocessor is electrically connected with the electrode slice on the conductive adhesive substrate slice through the D / A converter and the signal amplification circuit. The voltage output end of the power supply module is connected with the power supply end of the microprocessor, the power supply end of the man-machine interaction module, the voltage input end of the D / A converter and the voltage input end of the signal amplification circuit. According to the utility model, the stimulation current is sent to the electrode plate to act on each acupuncture point of the ankle and foot of a human body, and the ankle and foot of a user are stimulated in an electrical stimulation mode, so that the effects of eliminating muscle fatigue and relieving ankle and foot pain are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment technology, in particular to an electric stimulation therapeutic instrument, and specifically to an electric stimulation ankle and foot therapeutic instrument with multiple channels of electrodes. Background Art

[0002] With increasing health awareness, ankle and foot massagers have emerged in various forms. Currently, two main types of ankle and foot therapy devices are popular in China: flat-bottomed ankle and foot therapy devices and traction-type ankle and foot therapy devices. The flat-bottomed ankle and foot therapy devices resemble insoles and require lying down during treatment, which reduces pressure on the ankle and foot. The traction-type ankle and foot therapy devices, similar to traction devices used in hospitals, operate simply but offer limited functionality. They cannot readily treat and relieve ankle and foot fatigue. Like most massagers, they can only be used while the user is stationary, lacking flexibility. These ankle and foot therapy devices work by massaging and relaxing the muscles, ligaments, and other tissues surrounding the lower limbs and ankles and feet, correcting and maintaining their natural curvature. Using the body's own weight to apply arc-shaped traction, they stretch the lower limbs, relieve fatigue, and reduce pressure on the intervertebral discs. These devices offer only a palliative effect, failing to achieve therapeutic and rehabilitation goals. To this end, electrical stimulation therapeutic devices are mainly used for rehabilitation and treatment. Currently used stimulation electrodes are generally divided into two categories: surface type and implantable type. Since implantable electrodes require surgery when used, this limits the applicability of implantable electrodes to a certain extent. Surface electrodes have the advantages of being non-invasive, simple and convenient to use, and are therefore widely used. However, surface electrodes also have obvious drawbacks: they have poor stimulation accuracy and selectivity, and are prone to activating nerves around the target nerve, causing unnecessary stimulation. In actual application, it is difficult to attach the surface electrode to the optimal stimulation position. Moreover, during exercise training, as the posture of the stimulation site changes, the stimulation target and the surface electrode will move relative to each other, thus affecting the stimulation effect. Utility Model Content

[0003] The purpose of this utility model is to provide an ankle and foot electrostimulation therapeutic device with multiple channels. This device sends stimulation current into the electrodes to act on various acupuncture points on the ankle and foot of the human body, thereby stimulating the user's ankle and foot through electrical stimulation, thereby eliminating muscle fatigue and alleviating ankle and foot pain. To achieve the above purpose, the following technical solutions are adopted:

[0004] According to one aspect of the present invention, the present invention provides an electrostimulation ankle and foot therapeutic instrument with multi-channel electrodes, the electrostimulation ankle and foot therapeutic instrument comprising a microprocessor, a power module, a conductive gel substrate for setting a plurality of electrode sheets, and a human-computer interaction module communicatively connected to the microprocessor, the signal output end of the microprocessor being electrically connected to the electrode sheets on the conductive gel substrate through a signal conditioning circuit, the signal conditioning circuit comprising a D / A converter and a signal amplification circuit, the signal output end of the microprocessor being electrically connected to the electrode sheets on the conductive gel substrate through the D / A converter and the signal amplification circuit, the voltage output end of the power module being respectively connected to the power end of the microprocessor, the power end of the human-computer interaction module, the voltage input end of the D / A converter, and the voltage input end of the signal amplification circuit.

[0005] In the above solution, it is further preferred that the number of the conductive adhesive substrates is 2-5, and each conductive adhesive substrate is provided with electrode sheets arranged in an n×m matrix, wherein n and m are integers greater than or equal to 2.

[0006] The above solution is further preferred, wherein the human-computer interaction module includes a liquid crystal display and a membrane key, and the liquid crystal display and the membrane key are respectively connected to the microprocessor, wherein the liquid crystal display adopts a 128*64 dot matrix LCD display module.

[0007] The above solution is further preferred, wherein the signal amplification circuit includes a first comparison amplifier U1, a second comparison amplifier U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and an adjustable resistor R f The conversion output end of the D / A converter is connected to the negative input end of the first comparison amplifier U1 and one end of the resistor R2 through the resistor R1, and the output end of the first comparison amplifier U1 is connected to the other end of the resistor R1 and one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the resistor R3 and the adjustable resistor R f One end of the second comparison amplifier U2 is connected to the negative input end of the second comparison amplifier U2, and the output end of the second comparison amplifier U2 is connected to the adjustable resistor R f The other end of the resistor R3 is connected to the voltage output end of the power module, and the positive input end of the first comparator U1 and the positive input end of the second comparator U2 are connected to the ground respectively.

[0008] The above scheme is further preferred in that a constant current pulse control circuit and an electrode connection interface are further provided between the output end of the signal amplifying circuit and the input end of the electrode sheet, and the output end of the signal amplifying circuit is connected to the input end of the electrode sheet through the constant current pulse control circuit and the electrode connection interface.

[0009] The above scheme is further preferred, wherein the electrostimulation ankle and foot therapeutic apparatus also includes a temperature control detection circuit connected to the microprocessor, the temperature control detection circuit includes a temperature probe, a temperature signal amplification circuit, a temperature regulation circuit and a thermoelectric cooler, the sampling output end of the temperature probe is electrically connected to the temperature regulation circuit through the temperature signal amplification circuit, the output end of the temperature regulation circuit is connected to the input control end of the thermoelectric cooler through the H-bridge drive circuit, and the control end of the microprocessor is connected to the control end of the temperature regulation circuit.

[0010] The above solution is further preferred, wherein the model of the temperature regulating circuit is LTC1923 driver chip, the temperature measuring probe is a thermistor, the model of the thermistor is MF52AF, and the model of the thermoelectric cooler is TECI-12706 cooling chip.

[0011] In summary, the present invention adopts the above technical solution, and the present invention has the following technical effects: the multi-channel electrode of the present invention has certain superior performance in improving stimulation selectivity and control ability, and sends stimulation current into the electrode sheet to act on various acupuncture points of the human ankle and foot, and stimulates the user's ankle and foot through electrical stimulation. Electric shock stimulation can increase the oxygen carrying capacity of red blood cells and improve the nutritional status of tissues, thereby achieving the effect of eliminating muscle fatigue and alleviating ankle and foot pain; as different electrode contacts are activated, stimulation electric fields of different shapes can be formed on the base of the multi-channel electrode, thereby forming virtual stimulation electrodes of different shapes. By changing the activated electrode contacts, the position and size of the virtual electrode will change, realizing dynamic adjustment of the stimulation position and stimulation range. Compared with traditional ankle and foot disease therapeutic instruments, its multi-channel ankle and foot massager is small in size, easy to operate, and more convenient and efficient in treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the circuit principle of the first embodiment of a multi-channel electrode electrostimulation ankle and foot therapeutic device of the present invention;

[0013] Figure 2 This is a circuit schematic diagram of the temperature control detection circuit of the utility model;

[0014] Figure 3 This is a distribution diagram of the electrode stimulation field of a multi-channel electrode electrostimulation ankle and foot therapeutic device of the present invention;

[0015] Figure 4 This is a circuit schematic diagram of the signal amplification circuit of the utility model;

[0016] Figure 5 This is a schematic diagram of the circuit principle of the second embodiment of a multi-channel electrode electrostimulation ankle and foot therapeutic device of the present invention; DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many of the details listed in this specification are merely provided to help readers gain a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0018] Combine Figure 1 According to the utility model, a multi-channel electrode electrostimulation ankle and foot therapeutic instrument comprises a microprocessor 1, a power supply module, a conductive gel substrate 2 for arranging a plurality of electrode sheets 3, and a human-computer interaction module 3 communicatively connected to the microprocessor 1. The signal output end of the microprocessor 1 is electrically connected to the electrode sheets 3 on the conductive gel substrate 2 through a signal conditioning circuit. The signal conditioning circuit comprises a D / A converter and a signal amplification circuit. The signal output end of the microprocessor 1 is electrically connected to the electrode sheets 3 on the conductive gel substrate 2 through a D / A converter and a signal amplification circuit. The voltage output end of the power supply module is respectively connected to the power supply end of the microprocessor, the power supply end of the human-computer interaction module 3, the voltage input end of the D / A converter, and the voltage input end of the signal amplification circuit. The human-computer interaction module 3 comprises a liquid crystal display and a membrane key. The liquid crystal display and the membrane key are respectively connected to the microprocessor 1. The model of the microprocessor 1 adopts the single-chip microcomputer C8051F020 chip produced by Silabs. To ensure stable operation of the microcontroller, microprocessor 1 also includes a reset circuit, crystal oscillator circuit, and JTAG interface circuit. The power supply module provides multiple stable operating voltages: 3.3V, 5V, and 35V. The LCD uses a 128*64 dot matrix LCD display module, which comes with a built-in first- and second-level Chinese character library in two font sizes and an ASCII code library in two font sizes. The D / A converter uses the AD7305 chip, which has a four-channel 8-bit sampling DAC conversion output. The DAC output of each channel serves as the stimulation current output channel for the two electrodes. Three to five AD7305 chips can be used as analog signal output channels. Each analog signal output from the AD7305 chip is converted by the signal amplification circuit and then provides the stimulation signal for electrode 3.

[0019] In this utility model, if Figure 2As shown, the electroacupuncture ankle and foot therapeutic device also includes a temperature control detection circuit connected to the microprocessor 1, and the temperature control detection circuit includes a temperature probe 4, a temperature signal amplification circuit, a temperature regulation circuit and a thermoelectric cooler 5. The sampling output end of the temperature probe 4 is electrically connected to the temperature regulation circuit through the temperature signal amplification circuit. The signal amplification circuit is a signal discharge circuit composed of a TC2053 operational amplifier. The output end of the temperature regulation circuit is connected to the input control end of the thermoelectric cooler 5 through an H-bridge drive circuit, and the control end of the microprocessor 1 is connected to the control end of the temperature regulation circuit; the electrode sheet 3 on the conductive rubber base sheet 2 changes with the ambient temperature, and the electrode sheet 3 needs to be temperature-regulated, so that the blood circulation of the user's ankle and foot can be promoted in different seasons to relieve fatigue. And the effect of relieving stress, the temperature probe 4 collects the current temperature change of the conductive rubber substrate. The conductive rubber substrate 2 is made of flexible material conductive rubber. The model of the temperature regulation circuit is LTC1923 driver chip, and the temperature probe 4 is a thermistor. The model of the thermistor is MF52AF. The resistance of the thermistor is 10K at room temperature and has an accuracy of 1%. The model of the thermoelectric cooler 5 is TECI-12706 cooling plate, and the TECI-12706 cooling plate drives the TEC through an external H-bridge drive circuit. The H-bridge drive circuit uses NMOS power tube, silicon carbide power MOSFET tube or IGBT power tube, and the temperature measurement parameter range (value) of the LTC1923 driver chip is set by the microprocessor 1. The thermistor differentially amplifies the voltage corresponding to the detected conductive adhesive substrate temperature and the voltage corresponding to the set temperature. Under the control of the PI parameters within the LTC1923 driver chip, the magnitude and direction of the current in the TECI-12706 cooling plate are controlled, thereby realizing the heating or cooling process of the TECI-12706 cooling plate.

[0020] In this utility model, if Figure 1 、 Figure 2 and Figure 3 As shown, there are a large number of acupuncture points on the ankle and foot of the human body. Stimulating each acupuncture point can increase the oxygen carrying capacity of red blood cells and improve the nutritional status of tissues, thereby achieving the effect of eliminating muscle fatigue and alleviating ankle and foot pain. The conductive adhesive substrate 2 of the present invention is 2-5 pieces, and each conductive adhesive substrate 2 is provided with electrode sheets 3 arranged in an n×m matrix, wherein n and m are integers greater than or equal to 2. In the present invention, n×m is 4×5, 4×6, 5×5 or 4×4, that is, 16-25 contacts. Preferably, it is composed of 5 conductive adhesive substrates 2 and 24 metal contacts (electrode sheets 3) on each conductive adhesive substrate 2; as shown Figure 3 As shown, Figure 3The serial numbers 1-24 are 24 metal contacts, which are the contact positions between the electrode piece 3 and the stimulation site. The 24 metal contacts are evenly distributed on the entire conductive adhesive base sheet 2. Each metal contact is connected to a corresponding stimulation channel. Each channel can be controlled on and off by a membrane button. In actual use, even if the multi-channel electrode piece 3 (metal contact) is attached to the approximate position of the stimulation site, there is a high probability that one or several contacts will be in the optimal stimulation position. For this reason, the movement of the patient's limbs and the relative movement of the skin and muscle position will cause the most ideal stimulation target to change. The previously ideal stimulation target may no longer be ideal. After repeated experiments, this multi-channel electrode can adapt to the change of the stimulation target and find the ideal stimulation target again. When stimulating different acupuncture points, the size and shape of the required stimulation electric field are different. This device can set each channel through the membrane button, such as Figure 3 As shown in 401, the three stimulation channels 5, 6 and 7 are activated, and the stimulation signals are output to the multi-channel electrode pieces 3 (metal contacts) No. 5, 6 and 7, thereby forming an irregular stimulation electric field 401 on the substrate. The same method can also form a variety of different stimulation electric fields on the substrate to meet the needs of stimulating different parts. When the ankle-foot therapeutic device electrically stimulates the user, it is necessary to stimulate two or more different stimulation targets at the same time, while avoiding stimulation of the parts between the target targets. It can well meet this demand, such as Figure 3 In 402 and 403, the stimulation channels 10, 11, 22, and 23 are set to the activated state, and the stimulation signals are output to the corresponding contacts, then two stimulation electric fields 402 and 403 are formed on the base, while the part between 402 and 403 has no stimulation signal and will not stimulate parts outside the target, thereby greatly improving the accuracy of the stimulation.

[0021] like Figure 4 As shown, the signal amplification circuit includes a first comparison amplifier U1, a second comparison amplifier U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and an adjustable resistor R f The conversion output end of the D / A converter is connected to the negative input end of the first comparison amplifier U1 and one end of the resistor R2 through the resistor R1, and the output end of the first comparison amplifier U1 is connected to the other end of the resistor R1 and one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the resistor R3 and the adjustable resistor R f One end of the second comparison amplifier U2 is connected to the negative input end of the second comparison amplifier U2, and the output end of the second comparison amplifier U2 is connected to the adjustable resistor R fThe other end of the resistor R3 is connected to the input end of the electrode sheet 3, the other end of the resistor R3 is connected to the voltage output end of the power module, the positive input end of the first comparison amplifier U1 and the positive input end of the second comparison amplifier U2 are respectively connected to the ground, and the analog signal output by the D / A converter is amplified by the first comparison amplifier U1 and the second comparison amplifier U2 performs differential comparison to output a stable waveform signal. The output signal is used to electrically stimulate the electrode sheet 4.

[0022] In this utility model, if Figure 5 As shown, a constant current pulse control circuit and an electrode connection interface are further provided between the output end of the signal amplifying circuit and the input end of the electrode sheet 3, and the output end of the signal amplifying circuit is connected to the input end of the electrode sheet 3 through the constant current pulse control circuit and the electrode connection interface; the constant current pulse control circuit is composed of a single bridge drive circuit or a double bridge (H-bridge) circuit, and the single bridge drive circuit or the double bridge (H-bridge) circuit is composed of an optocoupler chip, or a VMOS constant current switch is used to form a single bridge drive circuit or a double bridge (H-bridge) circuit, and a constant current pulse is output through the single bridge drive circuit or the double bridge (H-bridge) circuit. The current is transmitted to the electrode sheet 3 to stimulate the ankle and foot acupoints, thereby eliminating muscle fatigue and alleviating ankle and foot pain. The PWM signal generated by the pulse output end of the microprocessor 1 is converted into digital-to-analog by a D / A converter, which can generate stimulation signal waveforms of different frequencies and types. The output stimulation signal frequency is set to 35Hz, the wave width is 300μs, and the amplitude is 30V. In order to meet the collaborative work of multiple stimulation channels, the phase difference between the stimulation signals of different channels is adjusted between 0-180°, which can realize a variety of different stimulation functions and effectively improve the applicability of the therapeutic device.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A multi-channel electrode electrostimulation ankle and foot therapeutic device, characterized by: The electrostimulation ankle and foot therapeutic instrument includes a microprocessor, a power module, a conductive rubber base sheet for arranging multiple electrode sheets, and a human-computer interaction module communicatively connected to the microprocessor. The signal output end of the microprocessor is electrically connected to the electrode sheets on the conductive rubber base sheet through a signal conditioning circuit. The signal conditioning circuit includes a D / A converter and a signal amplification circuit. The signal output end of the microprocessor is electrically connected to the electrode sheets on the conductive rubber base sheet through the D / A converter and the signal amplification circuit. The voltage output end of the power module is respectively connected to the power supply end of the microprocessor, the power supply end of the human-computer interaction module, the voltage input end of the D / A converter, and the voltage input end of the signal amplification circuit.

2. The multi-channel electrode electrostimulation ankle and foot therapeutic device according to claim 1, characterized in that: There are 2 to 5 conductive adhesive substrates, and each conductive adhesive substrate is provided with electrode sheets arranged in an n×m matrix, wherein n and m are integers greater than or equal to 2.

3. The multi-channel electrode electrostimulation ankle and foot therapeutic device according to claim 1, characterized in that: The human-computer interaction module includes a liquid crystal display and a membrane key, and the liquid crystal display and the membrane key are respectively connected to the microprocessor, wherein the liquid crystal display adopts a 128*64 dot matrix LCD display module.

4. The multi-channel electrode electrostimulation ankle and foot therapeutic device according to claim 1, characterized in that: The signal amplification circuit includes a first comparison amplifier U1, a second comparison amplifier U2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and an adjustable resistor R f The conversion output end of the D / A converter is connected to the negative input end of the first comparison amplifier U1 and one end of the resistor R2 through the resistor R1, and the output end of the first comparison amplifier U1 is connected to the other end of the resistor R1 and one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the resistor R3 and the adjustable resistor R f One end of the second comparison amplifier U2 is connected to the negative input end of the second comparison amplifier U2, and the output end of the second comparison amplifier U2 is connected to the adjustable resistor R f The other end of the resistor R3 is connected to the voltage output end of the power module, and the positive input end of the first comparator U1 and the positive input end of the second comparator U2 are connected to the ground respectively.

5. The multi-channel electrode electrostimulation ankle and foot therapeutic device according to claim 1 or 4, characterized in that: A constant current pulse control circuit and an electrode connection interface are also provided between the output end of the signal amplifying circuit and the input end of the electrode sheet. The output end of the signal amplifying circuit is connected to the input end of the electrode sheet through the constant current pulse control circuit and the electrode connection interface.

6. The multi-channel electrode electrostimulation ankle and foot therapeutic apparatus according to claim 1, 2, 3 or 4, characterized in that: The electrostimulation ankle and foot therapeutic instrument also includes a temperature control detection circuit connected to the microprocessor, and the temperature control detection circuit includes a temperature probe, a temperature signal amplification circuit, a temperature regulation circuit and a thermoelectric cooler. The sampling output end of the temperature probe is electrically connected to the temperature regulation circuit through the temperature signal amplification circuit, the output end of the temperature regulation circuit is connected to the input control end of the thermoelectric cooler through an H-bridge drive circuit, and the control end of the microprocessor is connected to the control end of the temperature regulation circuit.

7. The multi-channel electrode electrostimulation ankle and foot therapeutic device according to claim 6, characterized in that: The model of the temperature regulating circuit is LTC1923 driver chip, the temperature measuring probe is a thermistor, the model of the thermistor is MF52AF, and the model of the thermoelectric cooler is TECI-12706 cooling chip.

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