A reduced voltage electrocautery treatment circuit

Abstract

The utility model discloses a kind of hypotensive electrocautery treatment circuits, it is characterized in that, including a switching power supply circuit 10, an adjustable voltage reduction circuit 30, a voltage reduction output control circuit 40, a high-frequency oscillation generation and ion production circuit 50, an MCU master control circuit 20, the MCU master control circuit 20 and each module circuit are connected.There is no direct connection between the high-frequency oscillation generation and ion production circuit of the utility model and other circuit module ground, not a common power supply ground, the high-frequency high-voltage interference signal output by the surgical electrode connected with the high-frequency oscillation generation and ion production circuit when treating is very small to other module circuit by power supply ground, the complexity of anti-interference circuit design of other module circuit will be reduced, circuit cost is reduced, the stability of each circuit module increases, surgical electrode treatment output will also be more stable, reach better surgical effect.

Description

Technical Field

[0001] This utility model relates to the circuit of an electrocautery therapy device, specifically to a voltage-reducing electrocautery therapy circuit. Background Technology

[0002] Electrocautery is a commonly used surgical instrument for superficial surgeries in dermatology, otolaryngology, gynecology, and proctology. It works by delivering high-frequency, high-voltage electrical signals through surgical electrodes to the surgical site. However, this high-frequency, high-voltage signal can cause significant interference to surrounding circuits. Most current electrocautery devices share a common ground for the power supply, voltage boost / buck control, and output circuits. Since the surgical electrodes output high-frequency, high-voltage signals ranging from several hundred volts to over one thousand volts, this shared ground interferes with other circuits, causing instability in the entire device. Furthermore, to eliminate interference, numerous interference-stabilizing circuits are added to the power supply, voltage boost / buck control, and other circuits, making the electrocautery device complex and costly. Summary of the Invention

[0003] In view of this, it is necessary to provide an electrocautery treatment circuit in which the output ground and other module circuits are not grounded, thereby simplifying the entire electrocautery treatment circuit and making the electrocautery treatment circuit more stable.

[0004] The technical solution adopted by this utility model is: a voltage-reducing electrocautery treatment circuit, including a switching power supply circuit, an adjustable voltage-reducing circuit, a voltage-reducing output control circuit, a high-frequency oscillation generation and electroionization generation circuit, and an MCU main control circuit. The switching power supply circuit is connected to the voltage-reducing output circuit and the MCU main control circuit. The step-down output control circuit is connected to the adjustable step-down circuit, the MCU main control circuit, and the high-frequency oscillation generator and electro-ion generation circuit. The MCU main control circuit is connected to each of the module circuits, including the high-frequency oscillation generator and ion generator circuit, the switching power supply circuit, the step-down output control circuit, and the adjustable step-down circuit. The beneficial effects of this invention are as follows: The high-frequency oscillation generation and ion generation circuit described in this invention are not directly connected to the ground of the switching power supply circuit, the ground of the adjustable step-down circuit, the ground of the step-down output control circuit, and the ground of the MCU main control circuit, and do not share a common power ground. The high-frequency high-voltage interference signal output by the surgical electrode connected to the high-frequency oscillation generation and ion generation circuit during treatment does not directly pass through the power ground, thus having little impact on the other module circuits. The complexity of the anti-interference circuit design of the adjustable step-down circuit, the step-down output control circuit, and the MCU main control circuit is reduced, the stability of each circuit module is increased, and the treatment output of the surgical electrode is more stable, achieving better surgical results. Attached Figure Description

[0005] Figure 1 The diagram shown is a block diagram of the circuit principle for the voltage-reducing electrocautery treatment of this utility model.

[0006] Figure 2 The diagram shown is the main circuit structure of the voltage-reducing electrocautery treatment circuit of this utility model. Detailed Implementation

[0007] The present invention will be further described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0008] like Figure 1 and Figure 2 The diagram shown is a circuit principle block diagram and main circuit structure diagram of a voltage-reducing electrocautery treatment circuit according to this utility model. It includes a switching power supply circuit 10, an MCU main control circuit 20, an adjustable voltage-reducing circuit 30, a voltage-reducing output control circuit 40, and a high-frequency oscillation generation and ion generation circuit 50. The MCU main control circuit 20 is connected to the switching power supply circuit 10, the adjustable voltage-reducing circuit 30, the voltage-reducing output control circuit 40, and the high-frequency oscillation generation and ion generation circuit 50. The switching power supply circuit 10 is connected to the adjustable voltage-reducing circuit 30, the adjustable voltage-reducing circuit 30 is connected to the voltage-reducing output control circuit 40, and the adjustable voltage-reducing circuit 30 is connected to the high-frequency oscillation generation and ion generation circuit 50.

[0009] Specifically, the adjustable step-down circuit 30 includes resistors R5, R6, R4, R4, R23, and R38, diode D1, switching MOSFET Q7, current sampling module circuit U2, step-down control module U1, adjustable resistor VR2, optocoupler PC3, main coil of magnetic ring inductor L2, capacitor C4, and electrolytic capacitor C6. The adjustable step-down circuit 30 includes inductor L2, diode D1, resistor R5, capacitor C4, and electrolytic capacitor C6. Inductor L2 is connected to the positive terminal of the voltage output from the switching power supply circuit 10. Diode D1 is connected to the positive terminal of the output voltage 10 of the switching power supply and inductor L2. The step-down control module U1 outputs a PWM signal to the switching MOSFET Q7. The switching MOSFET Q7 switches in the same cycle... Different switching times cause different voltage drops in the current flowing through the magnetic ring inductor L2, the electrolytic capacitor C6, the resistor R6, the diode D1, the resistor R5, and the capacitor C4, thereby reducing the output voltage of the switching power supply 10. The diode D1, resistor R5, and capacitor C4 form a step-down freewheeling circuit. When the switching MOSFET Q7 is turned off, the current continues to supply power to the external load through the step-down freewheeling circuit. The output voltage sampling circuit, composed of resistor R4, resistor RR4, optocoupler PC3, resistor R38, resistor R23, and adjustable resistor VR2, provides the sampled voltage to the step-down control module U1 to control the output voltage. The electrolytic capacitor C6 and the resistor R6 form an output voltage regulator circuit. Specifically, the step-down output control circuit 40 includes a secondary coil of a magnetic ring inductor L2, an output control module U2, an optocoupler PC2, a capacitor CC6, a switching MOSFET Q8, and a diode D5. The induced voltage generated by the secondary coil of the magnetic ring inductor L2 is rectified and regulated by the output control module U2 to provide a driving voltage for the switching MOSFET Q8. The optocoupler PC2 and the capacitor CC6 couple the modulation PWM signal of the MCU main control circuit 20 to control the switching time of the switching MOSFET Q8 within the cycle, modulating the output voltage signal to be sent to the high-frequency oscillation generation and electroionization circuit 50. The step-down output control circuit 40 includes an inductor L2, a diode D5, an optocoupler PC2, an output control module U3, a switching MOSFET Q8, and a capacitor CC6. The switching MOSFET Q8, the inductor L2, the diode D5, and the positive input terminal of the high-frequency oscillation generator and ion generator circuit 50 are connected. The positive terminal of the high-frequency oscillation generator and ion generator circuit 50 is connected to the switching MOSFET Q8, and the negative terminal of the high-frequency oscillation generator and ion generator circuit 50 is connected to the diode D1, the switching MOSFET Q7, the resistor RR4, the resistor R6, and the optocoupler PC3.

[0010] Specifically, the high-frequency oscillation generation and ion generation circuit 50 uses the input modulation voltage signal to generate a self-excited oscillation signal, which is then boosted by a certain ratio. The boosted high-frequency high-voltage electrical signal is then output to the surgical site through the scalpel pen.

[0011] Specifically, the MCU main control circuit 20 mainly generates the PWM modulation signal to control the buck output control circuit 40. The MCU main control circuit 20 mainly provides the data parameters of the voltage value to be bucked by the adjustable buck circuit 30. The positive terminal of the high-frequency oscillation generator and ion generator circuit 50 is directly connected to the inductor L2. The switching MOSFET Q8 is removed. The output control module, the optocoupler PC2, and the capacitor CC6 are removed. The negative terminal of the high-frequency oscillation generator and ion generator circuit 50 is connected to the diode D1, the switching MOSFET Q7, the resistor RR4, the resistor R6, and the optocoupler PC3.

[0012] The working principle of this utility model is as follows: The switching power supply 10 provides DC power VDD and VCC for the entire circuit. VDD provides a step-down power supply to the adjustable step-down circuit 30. The adjustable step-down circuit 30 identifies and processes the step-down value data provided by the MCU main control circuit 20. The adjustable step-down circuit 30 steps down VDD to the voltage value corresponding to the step-down value data provided by the MCU main control circuit 20. The MCU main control circuit 20 outputs a PWM modulation signal to the step-down output control circuit 40 to modulate the voltage signal output by the adjustable step-down circuit 30. The MCU main control circuit 20 outputs a control signal to control the output and stop of the high-frequency oscillation generation and ion generation circuit 50. The high-frequency oscillation generation and ion generation circuit 50 is connected to the surgical electrode. When the high-frequency oscillation generation and ion generation circuit 50 outputs, it generates high voltage and releases ions. When the surgical electrode touches the surgical site, it generates a discharge, achieving the therapeutic effect.

[0013] The working principle of this utility model of step-down without common ground is as follows: The adjustable step-down circuit 30, under the control of the MCU main control circuit 20, provides the voltage signal to be output by the high-frequency oscillation generator and ion generation circuit 50. The stepped-down signal output by the adjustable step-down circuit 30 is output to the high-frequency oscillation generator and ion generation circuit 50 through the switching MOS transistor Q8 of the step-down output control circuit 40. The high-frequency oscillation generator and ion generation circuit 50 outputs a high-frequency high-voltage signal to the external load through the surgical electrode. The high-frequency high-voltage signal flows to ground through the load, then flows back to the high-frequency oscillation generator and ion generation circuit 50 from the ground, then flows to the switching MOS transistor Q7 of the adjustable step-down circuit 30, and then flows to the power ground GND from the switching MOS transistor Q7 of the adjustable step-down circuit 30. The high-frequency high-voltage signal output by the high-frequency oscillation generator and ion generation circuit 50 does not flow directly back to the power ground GND, but flows to the power ground GND through the switching MOS transistor Q7 of the adjustable step-down circuit 30.

[0014] The beneficial effects of this utility model are as follows: The high-frequency high-voltage electrical signal output by the high-frequency oscillation generation and ion generation circuit 50 of this utility model does not flow directly back to the power ground GND, but flows to the power ground GND through the switching MOS transistor Q7 of the adjustable step-down circuit 30. The interference of the high-frequency high-voltage electrical signal to the entire power ground is relatively weak. With less power ground interference, the power supply voltage is more stable. The MCU main control circuit 20, the switching power supply circuit 10, the adjustable step-down circuit 30, and the step-down output control circuit 40 will work more stably. This design of the output electrical signal not sharing a common ground simplifies the design of the interference filtering circuit due to less power ground interference. The simplified circuit cost of the interference filtering circuit is relatively lower than that of the common power ground design.

[0015] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A voltage-reducing electrocautery treatment circuit, characterized in that, It includes a switching power supply circuit, an adjustable step-down circuit, a step-down output control circuit, a high-frequency oscillation generator, an electro-ion generation circuit, and an MCU main control circuit. The switching power supply circuit is connected to the step-down output control circuit and the MCU main control circuit. The step-down output control circuit is connected to the adjustable step-down circuit, the MCU main control circuit, the high-frequency oscillation generator, and the electro-ion generation circuit. The MCU main control circuit is connected to each module circuit and the switching power supply circuit, and the MCU main control circuit is connected to the high-frequency oscillation generator, the electro-ion generation circuit, the step-down output control circuit, and the adjustable step-down circuit.

2. The voltage-reducing electrocautery treatment circuit according to claim 1, characterized in that, The adjustable buck circuit includes a switching MOSFET Q7, a current sampling module circuit U2, a buck control module U1, a diode D1, a resistor R5, a capacitor C4, an adjustable resistor VR2, a resistor R23, a resistor R38, an optocoupler PC3, a resistor RR4, a resistor R4, a resistor R6, an electrolytic capacitor C6, and an inductor L2. The buck control module U1 generates PWM to control the switching MOSFET Q7. The current sampling module U2 samples the current value and provides it to the buck control module U1. The adjustable resistor VR2, the resistors R23 and R38, the optocoupler PC3, the resistors RR4 and R4 sample the voltage and provide it to the buck control module U1.

3. The voltage-reducing electrocautery treatment circuit according to claim 2, characterized in that, The adjustable buck circuit includes a switching MOSFET Q7, a buck control module U1, a diode D1, an adjustable resistor VR2, a resistor R23, a resistor R38, an optocoupler PC3, a resistor RR4, a resistor R4, an electrolytic capacitor C6, and an inductor L2. The buck control module U1, diode D1, adjustable resistor VR2, resistor R23, resistor R38, optocoupler PC3, resistor RR4, resistor R4, electrolytic capacitor C6, inductor L2, and the PWM generated by the buck control module U1 control the switching MOSFET Q7. The adjustable resistor VR2, resistor R23, resistor R38, optocoupler PC3, resistor RR4, and resistor R4 sample the voltage and supply it to the buck control module U1.

4. The voltage-reducing electrocautery treatment circuit according to claim 3, characterized in that, The adjustable step-down circuit includes an inductor L2, a diode D1, a resistor R5, and a capacitor C4. The inductor L2 is connected to the positive terminal of the voltage output by the switching power supply circuit, and the diode D1 and the positive terminal of the voltage output by the switching power supply are connected to the inductor L2.

5. The voltage-reducing electrocautery treatment circuit according to claim 4, characterized in that, The step-down output control circuit includes an inductor L2, a diode D5, an optocoupler PC2, an output control module U3, a switching MOSFET Q8, and a capacitor CC6. The switching MOSFET Q8, the inductor L2, the diode D5, and the high-frequency oscillation generator are connected to the positive input of the electro-ion generation circuit. The optocoupler PC2 and the output control module U3 are connected to the MCU main control circuit. The MCU main control circuit generates a PWM signal to the output control module U3, and the output control module controls the switching MOSFET Q8.

6. The voltage-reducing electrocautery treatment circuit according to claim 5, characterized in that, The positive terminal of the high-frequency oscillation generator and ion generation circuit is connected to the switching MOS transistor Q8, and the negative terminal of the high-frequency oscillation generator and ion generation circuit is connected to the diode D1, the switching MOS transistor Q7, the resistor RR4, the resistor R6, and the optocoupler PC3.

7. The voltage-reducing electrocautery treatment circuit according to claim 6, characterized in that, When the positive terminal of the high-frequency oscillation generator and ion generation circuit is directly connected to the inductor L2, the switching MOSFET Q8 is canceled, the output control module, the optocoupler PC2, and the capacitor CC6 are canceled, and the negative terminal of the high-frequency oscillation generator and ion generation circuit is connected to the diode D1, the switching MOSFET Q7, the resistor RR4, the resistor R6, and the optocoupler PC3.

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