Neuromuscular electrical stimulation circuit and portable electrical stimulation therapy device

Abstract

This invention relates to a neuromuscular electrical stimulation circuit and a portable electrical stimulation therapy device. In this circuit, the first output terminal of a microcontroller 10 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to the positive terminal of a power supply battery BT1 via an inductor L1. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to the emitter of transistor Q2. The collector of transistor Q2 is connected to the first terminal of an electrode plate 20 via a capacitor C3. The second output terminal of the microcontroller 10 is connected to the emitter of transistor Q3 via a resistor R4. The base of transistor Q3 is connected to the positive terminal of the power supply battery BT1. The collector of transistor Q3 is connected to the base of transistor Q2. The neuromuscular electrical stimulation circuit of this invention has a simple structure and uses battery power, which can greatly reduce the size of the therapy device and make it easy to carry. Furthermore, this invention allows adjustment of the pulse amplitude, pulse width, and pulse frequency according to user needs, meeting the requirements of different users.

Description

Technical Field

[0001] This invention relates to the field of electrical stimulation therapy devices, and more specifically, to a neuromuscular electrical stimulation circuit and a portable electrical stimulation therapy device. Background Technology

[0002] Neuromuscular stimulation (NMS) is effective in treating motor disorders often caused by central nervous system diseases such as cerebral hemorrhage, stroke, hemiplegia, and spinal cord injury. It can effectively prevent postoperative venous thrombosis and aid in rehabilitation training. However, existing electrostimulation therapy devices are overly complex and bulky, making them inconvenient to carry and preventing patients from receiving treatment anytime, anywhere. Furthermore, AC power poses a risk of electric shock. Moreover, existing NMS devices operate according to a fixed set of pre-defined electrical stimulation patterns, with consistent output frequency and amplitude parameters. In reality, however, different users have varying needs, making a fixed pattern insufficient to meet diverse requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a neuromuscular electrical stimulation circuit and a portable electrical stimulation therapy device, in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: Constructing a neuromuscular electrical stimulation circuit, including a microcontroller, a power supply battery BT1, transistors Q1, Q2, and Q3, diodes D1 and D2, resistors R1, R2, R3, R4, R5, R6, R7, and R9, capacitors C2, C3, C4, and C5, inductor L1, light-emitting diode LED1, switch K1, and electrode plates;

[0005] The first input terminal of the microcontroller is connected to the first terminal of the switch K1, and the second terminal of the switch K1 is connected to the positive terminal of the power supply battery BT1; the power supply terminal of the microcontroller is connected to the positive terminal of the power supply battery BT1, and the ground terminal of the microcontroller is grounded.

[0006] The first output terminal of the microcontroller is connected to the base of transistor Q1. The base of transistor Q1 is connected to the emitter of transistor Q1 through resistor R1. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to the positive terminal of the power supply battery BT1 through inductor L1. The negative terminal of the power supply battery BT1 is grounded. The collector of transistor Q1 is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to the emitter of transistor Q1 through capacitor C2. The negative terminal of diode D1 is connected to... The resistor R2 is connected to the emitter of the transistor Q2; the emitter of the transistor Q2 is connected to the base of the transistor Q2 through the resistor R3; the emitter of the transistor Q2 is connected to the cathode of the diode D2; the anode of the diode D2 is connected to the base of the transistor Q2; the collector of the transistor Q2 is connected to the first terminal of the capacitor C3; the second terminal of the capacitor C3 is connected to the first terminal of the electrode plate; the first terminal of the capacitor C3 is grounded through the resistor R5; and the second terminal of the capacitor C3 is grounded through the capacitor C4.

[0007] The second output terminal of the microcontroller is connected to the emitter of the transistor Q3 through the resistor R4, the base of the transistor Q3 is connected to the positive terminal of the power supply battery BT1, and the collector of the transistor Q3 is connected to the base of the transistor Q2.

[0008] The third output terminal of the microcontroller is connected to the positive terminal of the light-emitting diode LED1 through the resistor R9, and the negative terminal of the light-emitting diode LED1 is grounded;

[0009] The second input terminal of the microcontroller is connected to the first terminal of the capacitor C5 and the first terminal of the resistor R7 respectively. The second terminal of the capacitor C5 is grounded, and the second terminal of the resistor R7 is grounded through the resistor R6. The second terminal of the resistor R7 is connected to the second electrode of the electrode plate.

[0010] The first input terminal of the microcontroller is used to receive a switch signal, and the second input terminal of the microcontroller is used to receive the acquisition signal from the electrode plate. The microcontroller controls the output signals of the first output terminal and the second output terminal according to the switch signal and the acquisition signal to adjust the pulse amplitude, pulse width and pulse frequency of the electrical stimulation signal on the electrode plate. The light-emitting diode LED1 is used to display the working status.

[0011] Furthermore, the neuromuscular electrical stimulation circuit of the present invention also includes a capacitor C1, and the positive terminal of the power supply battery BT1 is grounded through the capacitor C1.

[0012] Furthermore, the neuromuscular electrical stimulation circuit of the present invention also includes a capacitor C6 and a resistor R8, the first terminal of the switch K1 is grounded through the resistor R8, and the first terminal of the switch K1 is grounded through the capacitor C6.

[0013] Furthermore, in the neuromuscular electrical stimulation circuit described in this invention, the microcontroller is a PIC12F615 microcontroller.

[0014] Furthermore, in the neuromuscular electrical stimulation circuit described in this invention, the diode D2 is a Zener diode.

[0015] Furthermore, in the neuromuscular electrical stimulation circuit described in this invention, the electrode sheet is a conductive silicone electrode sheet.

[0016] Furthermore, in the neuromuscular electrical stimulation circuit described in this invention, the power supply voltage of the power supply battery BT1 is 3V;

[0017] The switch K1 is a push-button switch.

[0018] In addition, the present invention also provides a portable electrical stimulation therapy device, including the neuromuscular electrical stimulation circuit as described above.

[0019] Furthermore, in the portable electrical stimulation therapy device described in this invention, the portable electrical stimulation therapy device is a wristband.

[0020] Furthermore, in the portable electrical stimulation therapy device of the present invention, the wristband has a silicone strap.

[0021] The neuromuscular electrical stimulation circuit and portable electrical stimulation therapy device of the present invention have the following beneficial effects: The neuromuscular electrical stimulation circuit of the present invention has a simple structure and is powered by a battery, which can greatly reduce the size of the therapy device and make it easy to carry. At the same time, it is safe and reliable and there is no risk of electric shock. Furthermore, the present invention can adjust the pulse amplitude, pulse width and pulse frequency according to the user's needs to meet the needs of different users. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0023] Figure 1 This is a circuit diagram of a neuromuscular electrical stimulation circuit provided in Example 1. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] Example 1

[0026] refer to Figure 1 The neuromuscular electrical stimulation circuit of this embodiment includes a microcontroller 10, a power supply battery BT1, transistors Q1, Q2, and Q3, diodes D1 and D2, resistors R1, R2, R3, R4, R5, R6, R7, and R9, capacitors C2, C3, C4, and C5, an inductor L1, a light-emitting diode LED1, a switch K1, and electrode plates 20. The microcontroller 10 includes a first input terminal, a second input terminal, a first output terminal, a second output terminal, and a third output terminal, which will be described separately below.

[0027] The first input terminal of the microcontroller 10 is connected to the first terminal of switch K1, and the second terminal of switch K1 is connected to the positive terminal of the power supply battery BT1. The power supply terminal of the microcontroller 10 is connected to the positive terminal of the power supply battery BT1, and the ground terminal of the microcontroller 10 is grounded. Users can use switch K1 to turn the neuromuscular electrical stimulation circuit on and off. They can also adjust the number of times switch K1 is turned on and off to generate electrical stimulation signals with different pulse amplitudes, pulse widths, and pulse frequencies. Each time switch K1 is turned on and off, the electrical stimulation signal is changed, including changes to one or more parameters such as pulse amplitude, pulse width, and pulse frequency. To ensure that users can continue using the previously adjusted electrical stimulation signal, the microcontroller 10 saves the current operating parameters when powered off and automatically reads the saved parameters upon power-on, directly outputting the previously used electrical stimulation signal, thus improving the user experience. Optionally, switch K1 is a push-button switch.

[0028] The first output terminal of the microcontroller 10 is connected to the base of transistor Q1. The base of transistor Q1 is connected to the emitter of transistor Q1 through resistor R1. The emitter of transistor Q1 is grounded. The collector of transistor Q1 is connected to the positive terminal of the power supply battery BT1 through inductor L1. The negative terminal of the power supply battery BT1 is grounded. The collector of transistor Q1 is connected to the positive terminal of diode D1. The negative terminal of diode D1 is connected to the emitter of transistor Q1 through capacitor C2. The negative terminal of diode D1 is connected to the emitter of transistor Q2 through resistor R2. The emitter of transistor Q2 is connected to the base of transistor Q2 through resistor R3. The emitter of transistor Q2 is connected to the negative terminal of diode D2. The positive terminal of diode D2 is connected to the base of transistor Q2. The collector of transistor Q2 is connected to the first terminal of capacitor C3. The second terminal of capacitor C3 is connected to the first terminal of electrode plate 20. The first terminal of capacitor C3 is grounded through resistor R5. The second terminal of capacitor C3 is grounded through capacitor C4. The first output terminal of the microcontroller 10 outputs an adjustment signal, which controls the on / off state of transistor Q1 to achieve boost regulation of the output voltage of inductor L1. It can also simultaneously adjust the amplitude of the output pulse wave at the negative terminal of diode D1. A combination circuit of resistors R5 and R6, and capacitors C3 and C4 is used to couple the output pulse voltage of diode Q2, and after filtering, output it to electrode 20. Electrode 20 contacts the user's skin, thus acting on the user's body.

[0029] The second output terminal of the microcontroller 10 is connected to the emitter of transistor Q3 via resistor R4. The base of transistor Q3 is connected to the positive terminal of the power supply battery BT1, and the collector of transistor Q3 is connected to the base of transistor Q2. The second output terminal of the microcontroller 10 outputs an adjustment signal, which controls the on / off state of transistor Q3, thereby controlling the on / off state of transistor Q2, thus achieving adjustment of the pulse width and pulse frequency of the pulse signal.

[0030] The third output terminal of the microcontroller 10 is connected to the positive terminal of LED1 through resistor R9, and the negative terminal of LED1 is grounded. LED1 is used to display the working status, such as power-on status, power-off status, and switching status of different electrical stimulation signals; alternatively, multiple LEDs can be set.

[0031] The second input terminal of the microcontroller 10 is connected to the first terminal of capacitor C5 and the first terminal of resistor R7, respectively. The second terminal of capacitor C5 is grounded, and the second terminal of resistor R7 is grounded through resistor R6. The second terminal of resistor R7 is connected to the second electrode of electrode 20. By monitoring the acquired signal at the second electrode of electrode 20, the second input terminal of the microcontroller 10 can determine the current working state of electrode 20 and whether any abnormal state has occurred, such as whether there is an open circuit or short circuit.

[0032] The first input terminal of the microcontroller 10 is used to receive the switch signal, and the second input terminal of the microcontroller 10 is used to receive the acquisition signal of the electrode 20. The microcontroller 10 controls the output signals of the first output terminal and the second output terminal according to the switch signal and the acquisition signal to adjust the pulse amplitude, pulse width and pulse frequency of the electrical stimulation signal on the electrode 20.

[0033] In some embodiments, the neuromuscular electrical stimulation circuit of this embodiment also includes a capacitor C1. The positive terminal of the power supply battery BT1 is grounded through the capacitor C1. The capacitor C1 acts as a filter to filter out noise from the power supply.

[0034] In some embodiments, the neuromuscular electrical stimulation circuit of this embodiment further includes a capacitor C6 and a resistor R8. The first terminal of switch K1 is grounded through resistor R8 and the first terminal of switch K1 is grounded through capacitor C6. Capacitor C6 and resistor R8 can be used to prevent accidental touches and bounce of switch K1, ensuring accurate button presses.

[0035] In some embodiments, in the neuromuscular electrical stimulation circuit of this embodiment, the microcontroller 10 is a PIC12F615 microcontroller. The pin distribution of the PIC12F615 microcontroller can refer to the prior art, and will not be described again in this embodiment.

[0036] In some embodiments, in the neuromuscular electrical stimulation circuit of this embodiment, diode D2 is a Zener diode.

[0037] In some embodiments, the electrode pad 20 in the neuromuscular electrical stimulation circuit of this embodiment is a conductive silicone electrode pad.

[0038] In some embodiments, the power supply voltage of the power supply battery BT1 in the neuromuscular electrical stimulation circuit of this embodiment is 3V. Alternatively, the power supply battery BT1 can be a standard dry cell battery or a rechargeable battery. If the power supply battery BT1 is a rechargeable battery, the neuromuscular electrical stimulation circuit further includes a battery charging circuit, which can refer to the prior art.

[0039] The neuromuscular electrical stimulation circuit of this embodiment has a simple structure and is powered by a battery, which can greatly reduce the size of the therapeutic device, making it easy to carry. At the same time, it is safe and reliable with no risk of electric shock. Furthermore, this embodiment can adjust the pulse amplitude, pulse width, and pulse frequency according to user needs to meet different user requirements.

[0040] Example 2

[0041] A portable electrical stimulation therapy device according to this embodiment includes a neuromuscular electrical stimulation circuit as described in the above embodiment.

[0042] Alternatively, in this embodiment, the portable electrical stimulation therapy device is a wristband.

[0043] Alternatively, in the portable electrical stimulation therapy device of this embodiment, the wristband has a silicone strap.

[0044] The portable electrical stimulation therapy device of this embodiment has a simple neuromuscular electrical stimulation circuit structure and is powered by a battery, which can greatly reduce the size of the therapy device, making it easy to carry. At the same time, it is safe and reliable with no risk of electric shock. Furthermore, this embodiment can adjust the pulse amplitude, pulse width, and pulse frequency according to user needs to meet different user requirements.

[0045] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Those skilled in the art will further recognize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described above in terms of functionality. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0046] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They do not limit the scope of protection of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A neuromuscular electrical stimulation circuit, characterized in that, Includes a microcontroller (10), a power supply battery BT1, transistors Q1, Q2, and Q3, diodes D1 and D2, resistors R1, R2, R3, R4, R5, R6, R7, and R9, capacitors C2, C3, C4, and C5, inductor L1, light-emitting diode LED1, switch K1, and electrode plates (20); The first input terminal of the microcontroller (10) is connected to the first terminal of the switch K1, and the second terminal of the switch K1 is connected to the positive terminal of the power supply battery BT1; the power supply terminal of the microcontroller (10) is connected to the positive terminal of the power supply battery BT1, and the ground terminal of the microcontroller (10) is grounded. The first output terminal of the microcontroller (10) is connected to the base of the transistor Q1. The base of the transistor Q1 is connected to the emitter of the transistor Q1 through the resistor R1. The emitter of the transistor Q1 is grounded. The collector of the transistor Q1 is connected to the positive terminal of the power supply battery BT1 through the inductor L1. The negative terminal of the power supply battery BT1 is grounded. The collector of the transistor Q1 is connected to the positive terminal of the diode D1. The negative terminal of the diode D1 is connected to the emitter of the transistor Q1 through the capacitor C2. The negative terminal of the diode D1 is connected to the emitter of the transistor Q1 through the capacitor C2. The resistor R2 is connected to the emitter of the transistor Q2; the emitter of the transistor Q2 is connected to the base of the transistor Q2 through the resistor R3; the emitter of the transistor Q2 is connected to the negative terminal of the diode D2; the positive terminal of the diode D2 is connected to the base of the transistor Q2; the collector of the transistor Q2 is connected to the first terminal of the capacitor C3; the second terminal of the capacitor C3 is connected to the first terminal of the electrode plate (20); the first terminal of the capacitor C3 is grounded through the resistor R5; and the second terminal of the capacitor C3 is grounded through the capacitor C4. The second output terminal of the microcontroller (10) is connected to the emitter of the transistor Q3 through the resistor R4, the base of the transistor Q3 is connected to the positive terminal of the power supply battery BT1, and the collector of the transistor Q3 is connected to the base of the transistor Q2. The third output terminal of the microcontroller (10) is connected to the positive terminal of the light-emitting diode LED1 through the resistor R9, and the negative terminal of the light-emitting diode LED1 is grounded; The second input terminal of the microcontroller (10) is connected to the first terminal of the capacitor C5 and the first terminal of the resistor R7 respectively. The second terminal of the capacitor C5 is grounded, and the second terminal of the resistor R7 is grounded through the resistor R6. The second terminal of the resistor R7 is connected to the second pole of the electrode plate (20). The first input terminal of the microcontroller (10) is used to receive a switch signal, and the second input terminal of the microcontroller (10) is used to receive the acquisition signal from the electrode plate (20); the microcontroller (10) controls the output signals of the first output terminal and the second output terminal according to the switch signal and the acquisition signal to adjust the pulse amplitude, pulse width and pulse frequency of the electrical stimulation signal on the electrode plate (20); the light-emitting diode LED1 is used to display the working status; It also includes capacitors C1 and C6 and resistor R8. The positive terminal of the power supply battery BT1 is grounded through capacitor C1, the first terminal of switch K1 is grounded through resistor R8, and the first terminal of switch K1 is grounded through capacitor C6.

2. The neuromuscular electrical stimulation circuit according to claim 1, characterized in that, The microcontroller (10) is a PIC12F615 microcontroller.

3. The neuromuscular electrical stimulation circuit according to claim 2, characterized in that, The diode D2 is a Zener diode.

4. The neuromuscular electrical stimulation circuit according to claim 1, characterized in that, The electrode sheet (20) is a conductive silicone electrode sheet.

5. The neuromuscular electrical stimulation circuit according to claim 1, characterized in that, The power supply voltage of the battery BT1 is 3V; The switch K1 is a push-button switch.

6. A portable electrical stimulation therapy device, characterized in that, Includes the neuromuscular electrical stimulation circuit as described in any one of claims 1 to 5.

7. The portable electrical stimulation therapy device according to claim 6, characterized in that, The portable electrical stimulation therapy device is a wristband.

8. The portable electrical stimulation therapy device according to claim 7, characterized in that, The wristband has a silicone strap.

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