Handle key identification circuit of high-frequency host

Abstract

The utility model discloses a handle button identification circuit of a high-frequency host, the handle button identification circuit comprises a handle button circuit arranged in a handle, and a square wave signal generation circuit and an on-off identification circuit arranged in the high-frequency host, the square wave signal generation circuit is connected with the handle button circuit, the square wave signal generation circuit is used for generating a square wave signal, and the on-off identification circuit is connected with the handle button circuit. The signal is output to the handle key circuit; the handle keying circuit is connected with the on-off identification circuit, and the handle keying circuit is used for acquiring different keying signals input by a user and outputting the different keying signals to the on-off identification circuit when the square wave signals are continuously received; and the on-off identification circuit is used for identifying key instructions corresponding to the different key signals. The utility model aims to solve the problems that the internal circuit structure of the handle is complex and the recognition precision is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a handle button recognition circuit of a high-frequency host. BACKGROUND

[0002] The high-frequency surgical device, also known as a radiofrequency surgical device, is a kind of electrosurgical medical device. The high-frequency surgical device is composed of a high-frequency host, a handle and a surgical electrode. The signal generator of the high-frequency host sends energy, which is applied to the front end of the surgical electrode through the handle, to form an energy field to cut, coagulate and ablate the lesion tissue. The existing handle button recognition scheme of the high-frequency host uses a capacitance three-point oscillation circuit to recognize the resistance in the handle internal circuit and converts it into an AD value for output. In a high-frequency environment, a high-power signal may affect the analog signal circuit through electromagnetic radiation, conduction and other ways, resulting in an increase in the quantization error of the AD value and further reducing the accuracy of the handle button recognition, such as misjudging an unpressed button as pressed or a pressed button as unpressed.

[0003] It can be seen that the handle internal circuit structure of the existing scheme is complex, which increases the manufacturing cost of the high-frequency surgical device. At the same time, the influence of the high-frequency environment on the accuracy of the analog signal circuit reduces the overall reliability of the high-frequency surgical device, affects the experience of the doctor during the operation, and the analog signal is easily affected by the high-frequency high-power signal, resulting in inaccurate values recognized by the high-frequency surgical device and easily causing medical accidents. Content of the utility model

[0004] The main purpose of the present application is to provide a handle button recognition circuit of a high-frequency host, which aims to solve the problems of complex handle internal circuit structure and low recognition accuracy.

[0005] To achieve the above-mentioned purpose, the present application provides a handle button recognition circuit of a high-frequency host, which comprises a handle button circuit arranged in a handle and a square wave signal generating circuit and an on-off recognition circuit arranged in a high-frequency host, wherein:

[0006] The square wave signal generating circuit is connected with the handle button circuit, and the square wave signal generating circuit is used to generate a square wave signal and output to the handle button circuit;

[0007] The handle button circuit is connected with the on-off recognition circuit, and the handle button circuit is used to acquire different button signals input by a user and output to the on-off recognition circuit when receiving the square wave signal;

[0008] The on-off recognition circuit is used to recognize the button instructions corresponding to the different button signals.

[0009] In an embodiment, the square wave signal generating circuit comprises a signal generating circuit and a signal isolation circuit, wherein:

[0010] The signal generating circuit is connected with the signal isolation circuit, and the signal generating circuit is configured to generate the square wave signal and output the square wave signal to the signal isolation circuit.

[0011] The signal isolation circuit is connected with the handle key circuit, and the signal isolation circuit is configured to interfere and filter the square wave signal when receiving the square wave signal, and output the square wave signal after filtering the interference to the handle key circuit.

[0012] In an embodiment, the signal generating circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, and a switching voltage regulator chip, wherein:

[0013] The first end pin of the switching voltage regulator chip is left floating, the second end pin of the switching voltage regulator chip is connected with the signal isolation circuit and the first end of the fifth resistor respectively, the third end pin of the switching voltage regulator chip is grounded, the fourth end pin of the switching voltage regulator chip is left floating, the fifth end pin of the switching voltage regulator chip is connected with the first end of the first capacitor, the sixth end pin of the switching voltage regulator chip is connected with the first end of the third resistor, the seventh end pin of the switching voltage regulator chip is connected with the second end of the fourth resistor, the second end of the fifth resistor, and the first end of the sixth resistor respectively, the eighth end pin of the switching voltage regulator chip is left floating, the ninth end pin and the sixteenth end pin of the switching voltage regulator chip are grounded, the tenth end pin and the eleventh end pin of the switching voltage regulator chip are left floating, the twelfth end pin of the switching voltage regulator chip is connected with the first end of the second resistor, the thirteenth end pin of the switching voltage regulator chip is connected with the first end of the first resistor, the fourteenth end pin of the switching voltage regulator chip is connected with a power supply, and the fifteenth end pin of the switching voltage regulator chip is connected with the signal isolation circuit.

[0014] In an embodiment, the signal isolation circuit comprises a seventh resistor, a second capacitor, and a transformer, wherein:

[0015] The first end of the primary winding of the transformer is connected with the second end pin of the switching voltage regulator chip, the second end of the primary winding of the transformer is connected with the first end of the seventh resistor, the second end of the seventh resistor is connected with a power supply, and the third end of the primary winding of the transformer is connected with the fifteenth end pin of the switching voltage regulator chip; the fourth end of the secondary winding of the transformer is connected with the first end of the second capacitor and a on-off identification circuit respectively, the sixth end of the secondary winding of the transformer is connected with the second end of the second capacitor and a handle key circuit respectively, and the fifth end of the secondary winding of the transformer is left floating.

[0016] In an embodiment, the handle key circuit comprises a first diode, a second diode, a first key switch and a second key switch, wherein:

[0017] The anode of the first diode is connected with the output end of the square wave signal generating circuit, and the cathode of the first diode is connected with the first end of the first key switch; the cathode of the second diode is connected with the output end of the square wave signal generating circuit, and the anode of the second diode is connected with the first end of the second key switch; the cathode of the first diode is connected with the anode of the second diode and the on-off identification circuit respectively.

[0018] In an embodiment, the identification circuit of the high-frequency host handle key further comprises an MCU, and the on-off identification circuit comprises a first on-off circuit and a second on-off circuit, wherein:

[0019] The first on-off circuit is connected with the handle key circuit and the first input end of the MCU chip respectively, and the second on-off circuit is connected with the handle key circuit and the second input end of the MCU chip respectively;

[0020] The first on-off circuit is used for receiving the key signal input by the handle key circuit, identifying the key signal, and sending the key signal to the first input end of the MCU chip;

[0021] The second on-off circuit is used for receiving the key signal input by the handle key circuit, identifying the key signal, and sending the key signal to the second input end of the MCU chip.

[0022] In an embodiment, the first on-off circuit comprises a first optocoupler, a first triode, a third capacitor, an eighth resistor and a tenth resistor, wherein:

[0023] The first end of the first optocoupler is connected with the handle key circuit, the second end of the first optocoupler is connected with the second on-off circuit, the third end of the first optocoupler is connected with the first end of the third capacitor and the first end of the tenth resistor, and the fourth end of the first optocoupler is connected with a power supply; the base of the first triode is connected with the second end of the tenth resistor, the emitter of the first triode is connected with the second end of the third capacitor and the ground respectively, and the collector of the first triode is connected with the second end of the eighth resistor and the first input end of the MCU chip respectively.

[0024] In an embodiment, the second on-off circuit comprises a second optocoupler, a second triode, a fourth capacitor, an eleventh resistor and a twelfth resistor, wherein:

[0025] The first end of the second optocoupler is connected to the second end of the first optocoupler, the second end of the second optocoupler is connected to the handle button circuit, the third end of the second optocoupler is connected to the first end of the fourth capacitor and the first end of the twelfth resistor, and the fourth end of the second optocoupler is connected to the power supply; the base of the second transistor is connected to the second end of the twelfth resistor, the emitter of the second transistor is connected to the second end of the fourth capacitor and ground, and the collector of the second transistor is connected to the second end of the eleventh resistor and the second input terminal of the MCU chip.

[0026] In one embodiment, the high-frequency host controller button recognition circuit further includes a low-pass filter circuit, wherein:

[0027] The low-pass filter circuit is connected to the square wave signal generating circuit and the on / off identification circuit, respectively, and is used to filter the square wave signal output by the square wave signal generating circuit and transmit the filtered square wave signal to the on / off identification circuit.

[0028] In one embodiment, the low-pass filter circuit includes a fifth capacitor and a ninth resistor, wherein:

[0029] The first terminal of the fifth capacitor is connected to the first terminal of the ninth resistor and the square wave signal generating circuit, respectively; the second terminal of the fifth capacitor is connected to the second terminal of the first optocoupler and the first terminal of the second optocoupler, respectively; the first terminal of the ninth resistor is connected to the first terminal of the fifth capacitor and the square wave signal generating circuit, respectively; the second terminal of the ninth resistor is connected to the first terminal of the first optocoupler and the second terminal of the second optocoupler, respectively.

[0030] The above-mentioned one or more technical solutions provided in this application may have the following advantages or at least achieve the following technical effects:

[0031] This application discloses a recognition circuit for a high-frequency host handpiece button, including a handpiece button circuit disposed within the handpiece, and a square wave signal generating circuit and an on / off recognition circuit disposed within the high-frequency host. The square wave signal generating circuit generates a high-frequency square wave signal and outputs it to the handpiece button circuit. The handpiece button circuit, while continuously receiving the high-frequency square wave signal, acquires different button signals input by the user and outputs them to the on / off recognition circuit. The on / off recognition circuit identifies the button commands corresponding to the different button signals. In this application, since the handpiece button circuit within the handpiece only has a switching element, button recognition is not achieved through analog signal circuits. Instead, the square wave signal generated by the square wave signal generating circuit within the high-frequency host continuously acts on the handpiece button circuit. When the switching element changes state, the square wave signal changes, and the changed square wave signal is fed back to the on / off recognition circuit within the high-frequency host and identified. Therefore, signal generation, signal conversion, and signal recognition do not need to be implemented through the circuit structure within the handpiece, thus avoiding the impact of the high-frequency environment on the accuracy of button recognition, improving recognition reliability, and enhancing the surgeon's experience during operation. Furthermore, the simplified circuit structure within the handpiece reduces the manufacturing cost of high-frequency surgical equipment. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a functional schematic diagram of the first embodiment of the high-frequency host controller button recognition circuit proposed in this application;

[0034] Figure 2 This is a circuit diagram of a second embodiment of the high-frequency host controller button recognition circuit proposed in this application.

[0035] Figure 3 This is a schematic diagram of a filter circuit in an embodiment of the high-frequency host controller button recognition circuit proposed in this application.

[0036] Explanation of icon numbers:

[0037]

[0038]

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0043] To achieve accurate button recognition on a high-frequency handle, this application details the design of a high-frequency handle button recognition circuit based on optocoupler isolation, transformer isolation, and a square wave generator. This circuit offers advantages such as simple structure, high reliability, and strong isolation, meeting the application requirements of various scenarios.

[0044] Traditional gamepads have complex internal circuitry, requiring multiple resistors, capacitors, and analog signal chips (AD chips) to achieve different functions. This increases circuit complexity and failure rate. Furthermore, analog signal circuits are susceptible to external interference, affecting signal stability and accuracy. Insufficient isolation between the high-voltage output and internal low-voltage components poses safety hazards. Opto-isolators effectively isolate high-voltage and low-voltage circuits, preventing electrical noise and surge voltage from the high-voltage side from interfering with the low-voltage side (such as the MCU chip). This design primarily consists of a square wave signal generation circuit, an on / off recognition circuit, and related isolation components. By using an optocoupler, transformer, and square wave generator, the button states on the high-frequency gamepad can be effectively identified, and finally processed by the MCU chip to achieve accurate gamepad operation control.

[0045] The square wave signal generation circuit is one of the core components of the entire system. Its main responsibility is to generate a high-frequency square wave signal after power is applied and output it to the controller button circuit. The key to designing the square wave signal generation circuit lies in selecting appropriate oscillation and feedback units to ensure that the generated square wave signal has a stable frequency and amplitude. To improve the system's isolation and anti-interference capabilities, we also introduced transformer isolation technology into the square wave signal generation circuit. Transformer isolation utilizes the principle of electromagnetic induction to achieve electrical isolation, transmitting signals through magnetic coupling between the primary and secondary sides of the transformer. In this design, we connect the primary side of the transformer to the output terminal of the square wave signal generation circuit, and the secondary side to the input terminal of the controller button circuit. When the square wave signal generation circuit outputs a high-frequency square wave signal, it generates a changing magnetic flux on the primary side of the transformer, thereby inducing a corresponding electrical signal on the secondary side. In this way, we achieve high-voltage isolation and signal transmission between the high-frequency host and the controller circuit.

[0046] The on / off recognition circuit acts as a bridge connecting the handle button circuit and the MCU chip. It generates a button recognition signal upon receiving a button signal and sends it to the MCU chip for processing. To improve the system's anti-interference capability and isolation, this design employs a combination of optocoupler isolation and transistor on / off switching to achieve button signal on / off recognition. To further enhance the system's isolation and anti-interference capabilities, optocoupler isolation technology is introduced into the on / off recognition circuit. Optocoupler isolation is a technique that uses optical signals for electrical isolation. It converts the input signal into an optical signal, and then uses a photoelectric conversion device to convert the optical signal into an electrical signal for output, thus achieving electrical isolation between the input and output. In this design, the optocoupler is placed between the handle button circuit and the on / off recognition circuit. When a button is pressed, the current or voltage change in the button circuit drives the LED in the optocoupler to light up, triggering the phototransistor to conduct and generate a button recognition signal. In this way, we further isolate the on / off recognition circuit from high-frequency signal interference.

[0047] Based on this, this application provides a high-frequency host controller button recognition circuit, aiming to solve the problems of numerous internal circuit requirements and low recognition accuracy in the controller. Simultaneously, it effectively isolates the host's high-frequency output from the controller's low-voltage input, improving the controller's recognition capability. (Reference) Figure 1 , Figure 1 This is a functional schematic diagram of the first embodiment of the high-frequency host controller button recognition circuit proposed in this application.

[0048] In this embodiment, the application includes a handle button circuit 30 disposed within the handle, and a square wave signal generating circuit 10 and an on / off recognition circuit 20 disposed within the high-frequency host, wherein:

[0049] The square wave signal generating circuit 10 is connected to the handle button circuit 30. The square wave signal generating circuit 10 is used to generate a square wave signal and output the electrically isolated square wave signal to the handle button circuit 30.

[0050] The handle button circuit 30 is connected to the on / off recognition circuit 20. The handle button circuit 30 is used to acquire different button signals input by the user and output them to the on / off recognition circuit 20 when the square wave signal is received.

[0051] The on / off recognition circuit 20 is used to identify the key commands corresponding to the different key signals.

[0052] Specifically, in this embodiment, this application achieves a high-precision, high-speed handheld button recognition system through the coordinated operation of the square wave signal generating circuit 10, the handle button circuit 30, and the on / off recognition circuit 20. This system can accurately identify the user's button operations and convert them into instructions that can be recognized by the host system, thereby improving the convenience and accuracy of user operation.

[0053] The recognition circuit for the high-frequency controller's button operation mainly consists of two parts: a square wave signal generation circuit 10 and an on / off recognition circuit 20. The square wave signal generation circuit 10 generates a high-frequency square wave signal and outputs it to the controller button circuit 30; the on / off recognition circuit 20 receives the button signals from the controller button circuit and generates a button recognition signal, which is then sent to the MCU chip for processing. The square wave signal generation circuit 10 and the on / off recognition circuit 20 work together to achieve high-precision, high-speed recognition of controller button operations.

[0054] The square wave signal generating circuit 10 is one of the core components of the entire recognition circuit. The square wave signal it generates is transmitted to the handle button circuit 30 via transformer isolation. The square wave signal generating circuit internally includes components such as an oscillator, amplifier, and filter, which work together to generate the square wave signal. When the handle button circuit 30 continuously receives the square wave signal, it changes the square wave signal by switching its own switching elements. The changed square wave signal is then fed back to the on / off recognition circuit 20 and identified. Preferably, the generated square wave signal is a high-frequency signal, i.e., a high-frequency square wave signal. The advantage of a high-frequency square wave signal is that it reduces interference and attenuation during signal transmission, improving the accuracy and stability of the recognition.

[0055] In the square wave signal generation circuit 10, resistors are used to limit current, divide voltage, and adjust signal amplitude. Specifically, resistors R1, R2, R3, and R4 are connected to the pins of the switching regulator chip, forming an oscillation circuit that determines the frequency and waveform of the output square wave signal. Capacitors in the circuit serve to filter, couple, and store energy. Capacitors R1 and R2, in particular, are used in the square wave signal generation circuit 10 to stabilize voltage, filter noise, and ensure the quality of the output square wave signal. As the core component of the square wave signal generation circuit 10, the switching regulator chip generates the square wave signal through its internal oscillator and switching transistor. The LT1533CS chip selected in this scheme has advantages such as high efficiency, good stability, and small size, making it very suitable for generating high-frequency signals. In the square wave signal generation circuit 10, the transformer T transmits the high-frequency signal from the primary winding to the secondary winding through electromagnetic induction, while simultaneously achieving electrical isolation. This prevents the high-frequency signal from interfering with or damaging the handle button circuit 30. The on / off recognition circuit 20 is responsible for receiving the button signals input from the handle button circuit 30, and recognizing and processing them. When a button is pressed or released, the state of the handle button circuit 30 changes. The on / off recognition circuit 20 generates a button recognition signal by detecting this change and sends it to the MCU chip for recognition and processing.

[0056] The on / off recognition circuit 20 is used to receive and process signals from different buttons and detect the on / off state of the buttons. Typically, the on / off recognition circuit 20 includes signal processing elements (such as comparators, logic gates, etc.) and output elements (such as bipolar transistors, field-effect transistors, etc.) to amplify, shape, and convert the button signals.

[0057] The controller button circuit 30 receives high-frequency square wave signals from the square wave signal generation circuit 10 and captures these button operations when the user presses different buttons. These button operations then change the square wave signal in the circuit to generate button signals. It is connected to the square wave signal generation circuit 10 to receive square wave signals, and also to the on / off recognition circuit 20 to output the button signals generated by capturing button operations. As a bridge between user input and host processing, the controller button circuit 30 accurately converts user button operations into electrical signals.

[0058] Specifically, it should be noted that when a button is pressed, the resistance or capacitance of components in the button circuit changes, causing a change in the current or voltage in the circuit. The continuity recognition circuit 20 determines whether a button has been pressed by detecting this change. Specifically, when a button on the handle button circuit 30 is pressed, the current or voltage in the continuity recognition circuit 20 exceeds a preset threshold, triggering the signal output element in the continuity recognition circuit 20 to generate a corresponding output signal. This output signal, after amplification or conversion, ultimately becomes a standard button recognition signal and is sent to the MCU chip for processing.

[0059] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in Embodiment 1 above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a circuit diagram of an embodiment of the single-button physical switch circuit proposed in this utility model.

[0060] In this embodiment, the square wave signal generating circuit 10 includes a signal generation circuit 11 and a signal isolation circuit 12, wherein:

[0061] The signal generation circuit 11 is connected to the signal isolation circuit 12. The signal generation circuit 11 is used to generate the square wave signal and output it to the signal isolation circuit 12.

[0062] The signal isolation circuit 12 is connected to the handle button circuit 30. When the square wave signal is received, the signal isolation circuit 12 is used to perform voltage transformation on the square wave signal through the transformer T, and at the same time, to electrically isolate the signal generation circuit 11 and the handle button circuit 30 to prevent the signal generation circuit 11 from interfering with the handle button circuit 30.

[0063] The signal isolation circuit 12 is connected to the handle button circuit 30. The signal isolation circuit 12 is used to filter out interference from the square wave signal when it receives the square wave signal, and output the square wave signal after interference filtering to the handle button circuit 30.

[0064] Specifically, in this embodiment, the square wave signal generating circuit 10 mainly consists of two parts: a signal generation circuit 11 and a signal isolation circuit 12. By generating and processing the square wave signal, it ensures that the signal can be safely and effectively transmitted to the handle button circuit 30. The following is a description of these two circuit parts:

[0065] The signal generation circuit 11 mainly consists of resistors, capacitors, and a switching regulator chip. The switching regulator chip, as the core component, generates a square wave signal through its internal oscillator. Resistors and capacitors are used to adjust the signal frequency and waveform to ensure the signal quality meets requirements. The main function of the signal isolation circuit 12 is to prevent high-frequency signals from interfering with the handle button circuit 30. It typically includes components such as a transformer, which transmits the high-frequency signal from the signal generation circuit 11 to the handle button circuit 30 through electromagnetic induction, while simultaneously achieving electrical isolation. The signal generation circuit 11 is the core part of the square wave signal generation circuit 10, responsible for generating the square wave signal. The circuit internally contains components such as an oscillator and a frequency divider to set and generate a square wave signal of a specific frequency. The oscillator generates the original oscillation signal, and the frequency divider divides the signal to the required frequency range as needed. Finally, the signal generation circuit 11 outputs a stable square wave signal to the signal isolation circuit 12.

[0066] The main function of the signal isolation circuit 12 is to ensure the safety and stability of the square wave signal during transmission, while preventing the signal generation circuit 11 from interfering with the handle button circuit 30. The signal isolation circuit 12 typically contains a transformer T. When a square wave signal is received from the signal generation circuit 11, the transformer T transforms the signal voltage to meet the input requirements of the handle button circuit 30. The electrical isolation characteristics of the transformer T prevent direct electrical connection between the signal generation circuit 11 and the handle button circuit 30, thereby effectively preventing noise or interference signals generated by the signal generation circuit 11 from affecting the handle button circuit 30.

[0067] In addition to the isolation provided by the transformer T, the signal isolation circuit 12 also includes components such as filters to further filter out noise and interference components in the high-frequency square wave signal. These filters may include low-pass filters, band-pass filters, etc., depending on the required signal characteristics. After voltage transformation and interference filtering, the signal isolation circuit 12 safely and stably outputs the processed square wave signal to the handle button circuit 30. The square wave signal generation circuit 10 ensures the safety and stability of the square wave signal during transmission, while preventing the signal generation circuit 11 from causing unnecessary interference to the handle button circuit 30.

[0068] Further, in this embodiment, the signal generation circuit 11 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, and a switching regulator chip IC, wherein:

[0069] The first pin of the switching regulator chip IC is left floating. The second pin of the switching regulator chip IC is connected to the first terminal of the signal isolation circuit 12 and the fifth resistor R5, respectively. The third pin of the switching regulator chip IC is grounded. The fourth pin of the switching regulator chip IC is left floating. The fifth pin of the switching regulator chip IC is connected to the first terminal of the first capacitor C1. The sixth pin of the switching regulator chip IC is connected to the first terminal of the third resistor R3. The seventh pin of the switching regulator chip IC is connected to the second terminal of the fourth resistor R4 and the first terminal of the fifth resistor R5, respectively. Two terminals: the first terminal of the sixth resistor R6 is connected; the eighth terminal of the switching regulator chip IC is left floating; the ninth and sixteenth terminals of the switching regulator chip IC are grounded; the tenth and eleventh terminals of the switching regulator chip IC are left floating; the twelfth terminal of the switching regulator chip IC is connected to the first terminal of the second resistor R2; the thirteenth terminal of the switching regulator chip IC is connected to the first terminal of the first resistor R1; the fourteenth terminal of the switching regulator chip IC is connected to the power supply VCC; and the fifteenth terminal of the switching regulator chip IC is connected to the signal isolation circuit 12.

[0070] It should be further explained that in the detailed composition of the square wave signal generating circuit 10, the signal generation circuit 11 utilizes a switching regulator chip IC, multiple resistors and capacitors, and other components to work together to generate a stable square wave signal. The following is a detailed description of the circuit's operating principle and component connections:

[0071] Resistors R1, R2, R3, and R4 are connected to the pins of the switching regulator IC chip, forming an oscillation circuit that determines the frequency and waveform of the output square wave signal. Capacitors in the circuit serve filtering, coupling, and energy storage functions. Specifically, capacitors C1 and C2 in the square wave signal generation circuit 10 are used to stabilize voltage and filter noise, ensuring the quality of the output square wave signal. Capacitor C1 acts as a feedback capacitor to stabilize the output voltage and prevent oscillation. Resistors R1, R2, R3, R4, R5, and R6 are used for voltage division, current limiting, and threshold setting, ensuring the switching regulator IC chip functions properly.

[0072] The power supply VCC provides power to the switching regulator chip IC through pin fourteen. Adjusting the value of the third resistor R3 can affect the output frequency or duty cycle of the switching regulator chip IC. The connection between pin five and the first capacitor C1 forms a feedback network to stabilize the output voltage. Pin two outputs a stable square wave signal, which is transmitted to the handle button circuit 30 after passing through signal isolation circuit 12. Through appropriate resistor and capacitor configurations, and the internal protection mechanisms of the switching regulator chip IC, abnormal conditions such as short circuits, overvoltage, and overcurrent can be prevented.

[0073] Furthermore, in this embodiment, the signal isolation circuit 12 includes a seventh resistor R7, a second capacitor C2, and a transformer T, wherein:

[0074] The first end of the primary winding of the transformer T is connected to the second pin of the switching regulator chip IC1. The second end of the primary winding of the transformer T is connected to the first end of the seventh resistor R7, and the second end of the seventh resistor R7 is connected to the power supply VCC. The third end of the primary winding of the transformer T is connected to the fifteenth pin of the switching regulator chip IC1. The fourth end of the secondary winding of the transformer T is connected to the first end of the second capacitor C2 and the on / off identification circuit 20. The sixth end of the secondary winding of the transformer T is connected to the second end of the second capacitor C2 and the handle button circuit 30. The fifth end of the secondary winding of the transformer T is left floating.

[0075] Further explanation is needed: In this design, the primary side of transformer T is connected to the output of the square wave signal generating circuit, while the secondary side is connected to the input of the handle button circuit 30. When the signal generating circuit 11 outputs a square wave signal, a changing magnetic flux is generated on the primary side of transformer T, which in turn induces a corresponding electrical signal on the secondary side. The square wave signal is transmitted from the signal generating circuit 11 to the handle button circuit 30 through electromagnetic induction, while simultaneously achieving electrical isolation. The main function of the signal isolation circuit 12 is to prevent high-frequency signals from interfering with the handle button circuit 30.

[0076] In this embodiment, the handle button circuit 30 includes a first diode D1, a second diode D2, a first button switch SW1, and a second button switch SW2, wherein:

[0077] The anode of the first diode D1 is connected to the output terminal of the square wave signal generating circuit 10, and the cathode of the first diode D1 is connected to the first terminal of the first push button switch SW1; the cathode of the second diode D2 is connected to the output terminal of the square wave signal generating circuit 10, and the anode of the second diode D2 is connected to the first terminal of the second push button switch SW2; the cathode of the first diode D1 is connected to the anode of the second diode D2 and the on / off recognition circuit 20.

[0078] Specifically, the handle button circuit 30 uses two diodes (first diode D1 and second diode D2) and two button switches (first button switch SW1 and second button switch SW2) to construct the circuit. This design allows the circuit to distinguish between two different button operations and transmit the corresponding signals to the on / off recognition circuit 20. The following is a detailed description of the circuit's operation:

[0079] As a current-limiting resistor, R9 protects the optocoupler from damage caused by excessive current. Simultaneously, R9 also participates in voltage division, ensuring the optocoupler can correctly identify and respond to input signals. When the corresponding button is pressed, forming a circuit, the input terminal of the optocoupler receives a sufficient voltage difference, causing the internal LED to light up. The light emitted by the LED is received by the phototransistor, thereby triggering the optocoupler to conduct.

[0080] It is particularly important to note that the handle button circuit 30 is located within the handle. When the cutting button on the handle is pressed, it indicates that the first button switch SW1 is closed, thus creating a circuit. The square wave passes through the first diode D1 and then flows through the ninth resistor R9, turning on the first optocoupler IC1. When the coagulation button on the handle is pressed, it indicates that the second button switch SW2 is closed, also creating a circuit. The square wave passes through the second diode D2 and then flows through the ninth resistor R9, turning on the second optocoupler IC2.

[0081] Furthermore, in this embodiment, the recognition circuit for the high-frequency host handle buttons further includes an MCU, and the on / off recognition circuit includes a first on / off circuit and a second on / off circuit, wherein:

[0082] The first on / off circuit 21 is connected to the handle button circuit 30 and the first input terminal 1 of the MCU chip respectively, and the second on / off circuit 22 is connected to the handle button circuit 30 and the second input terminal 2 of the MCU chip respectively;

[0083] The first on / off circuit 21 is used to receive the button signal input from the handle button circuit 30, identify the button signal, and send it to the first input terminal 1 of the MCU chip;

[0084] The second on / off circuit 22 is used to receive the button signal input from the handle button circuit 30, identify the button signal, and send it to the second input terminal 2 of the MCU chip.

[0085] Specifically, in this embodiment, the on / off recognition circuit 20 serves as a bridge connecting the handle button circuit 30 and the MCU. It mainly consists of two independent on / off circuits (a first on / off circuit 21 and a second on / off circuit 22) and the MCU. These two on / off circuits are responsible for receiving, processing, and forwarding button signals from the handle button circuit 30, ensuring that the MCU can accurately capture the user's operational intent.

[0086] The on / off identification circuit 20 is responsible for receiving the button signals from the handle button circuit and generating button identification signals to send to the MCU chip for processing. When the cutting button on the handle is pressed, it indicates that the first button switch SW1 is closed, and the first on / off circuit 21 is turned on. When the coagulation button on the handle is pressed, it indicates that the second button switch SW2 is closed, and the second on / off circuit 22 is turned on. The main functions of the on / off circuit are signal reception, signal identification, and signal forwarding. The signal reception process is achieved by physically connecting to the handle button circuit 30 to receive the button signals from that circuit. The signal identification process involves decoding and identifying the received signals to determine which button was pressed. Finally, the signal forwarding process involves sending the identified signal to the input terminal of the MCU chip.

[0087] Further, in this embodiment, the first switching circuit 21 includes a first optocoupler IC1, a first transistor Q1, a third capacitor C3, an eighth resistor R8, and a tenth resistor R10, wherein:

[0088] The first terminal of the first optocoupler IC1 is connected to the handle button circuit 30, the second terminal of the first optocoupler IC1 is connected to the second switching circuit 22, the third terminal of the first optocoupler IC1 is connected to the first terminal of the third capacitor C3 and the first terminal of the tenth resistor R10, and the fourth terminal of the first optocoupler IC1 is connected to the power supply VCC; the base of the first transistor Q1 is connected to the second terminal of the tenth resistor R10, the emitter of the first transistor Q1 is connected to the second terminal of the third capacitor C3 and ground respectively, and the collector of the first transistor is connected to the second terminal of the eighth resistor and the first input terminal of the MCU chip respectively.

[0089] Specifically, the cutting button is the first button switch SW1. When the first button switch SW1 is pressed, the square wave signal passes through the first diode D1, the ninth resistor R9, and the optocoupler IC1, forming a loop and returning to the square wave signal source. At this time, the optocoupler IC1 is turned on, causing the base of the first transistor Q1 to receive a high-level signal. The first transistor Q1 is turned on, causing the first on / off circuit 21 to output a low-level signal. The first terminal 1 of the MCU chip detects the low-level signal output from the RF_CUT_Key1 port and recognizes that the cutting button on the handle has been pressed. When the cutting button on the handle is pressed, the first button switch SW1 in the handle button circuit 30 closes, forming a loop including the square wave signal generation circuit, the first diode D1, the ninth resistor R9, and the first optocoupler IC1. After passing through D1 and R9, the square wave signal is received by the light-emitting diode of IC1 and converted into a light signal. This light signal is then received by the phototransistor inside IC1, triggering it to conduct, thereby generating a falling edge or low-level signal at the output of IC1.

[0090] This signal, after being current-limited by the tenth resistor R10, is sent to the base of the first transistor Q1. Once the base of Q1 receives a sufficient voltage difference, it begins to conduct, allowing current to flow from the collector to the emitter. This current, after being current-limited by the eighth resistor R8, is sent to the first input terminal of the MCU chip. The MCU uses the high / low level or edge changes of this input signal to identify whether the cut button has been pressed and executes the corresponding operation.

[0091] Further, in this embodiment, the second switching circuit 22 includes a second optocoupler IC2, a second transistor Q2, a fourth capacitor C4, an eleventh resistor C11, and a twelfth resistor C12, wherein:

[0092] The first terminal of the second optocoupler IC2 is connected to the second terminal of the first optocoupler IC1, the second terminal of the second optocoupler IC2 is connected to the handle button circuit 30, the third terminal of the second optocoupler IC2 is connected to the first terminal of the fourth capacitor C4 and the first terminal of the twelfth resistor R12, and the fourth terminal of the second optocoupler IC2 is connected to the power supply VCC; the base of the second transistor Q2 is connected to the second terminal of the twelfth resistor R12, the emitter of the second transistor Q2 is connected to the second terminal of the fourth capacitor C4 and ground, and the collector of the second transistor Q2 is connected to the second terminal of the eleventh resistor R11 and the second input terminal of the MCU chip.

[0093] Specifically, the coagulation button is the second button switch SW2. When the second button switch SW2 is pressed, the square wave signal passes through the second diode D2, the ninth resistor R9, and the optocoupler IC2 to form a loop and then returns to the square wave signal source. The optocoupler IC2 conducts, causing the base of the second transistor Q2 to receive a high-level signal. The second transistor Q2 conducts, causing the second on / off circuit 22 port to output a low-level signal. The second terminal 2 of the MCU chip detects the low-level signal at the RF_THROM_Key1 port and recognizes that the coagulation button on the handle has been pressed.

[0094] Specifically, it should be noted that the first on / off circuit 21 and the second on / off circuit 22 are used to identify the states of the cutting button and the coagulation button, respectively. When the corresponding button is pressed, the optocoupler is turned on, causing the first transistor Q1 or the second transistor Q2 to turn on, thereby enabling the MCU to receive a low-level signal. When the corresponding button is not pressed, the square wave signal generated by the square wave signal generating circuit 10 is transmitted to the handle button circuit 30 through the transformer T. Since the button on the handle is not pressed, the circuit is in the off state, and no current flows through the optocouplers IC1 and IC2. Therefore, both the first transistor Q1 and the second transistor Q2 are in the off state, and the output port of the on / off identification circuit 20 remains in the high-level state.

[0095] Based on the first and / or second embodiments of this application, in the third embodiment of this application, the content that is the same as or similar to that in embodiments one and two above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 , Figure 3 This is a schematic diagram of the filter circuit of the high-frequency host controller button recognition circuit proposed in the embodiments of this application.

[0096] In this embodiment, the high-frequency host controller button recognition circuit further includes a low-pass filter circuit 40, wherein:

[0097] The low-pass filter circuit 40 is connected to the square wave signal generating circuit 10 and the on / off identification circuit 20, and is used to filter the square wave signal output by the square wave signal generating circuit 10 and transmit the filtered square wave signal to the on / off identification circuit 20.

[0098] It is easy to understand that, in this embodiment, the voltage signal output by the square wave signal generating circuit 10 contains high-frequency noise. Therefore, a low-pass filter circuit 40 can be set between the square wave signal generating circuit 10 and the on / off recognition circuit 20 to perform low-pass filtering on the output voltage signal, further ensuring the accuracy of the voltage signal received by the on / off recognition circuit 20. The main function of the low-pass filter circuit 40 is to filter the square wave signal output from the square wave signal generating circuit 10. The filtering process aims to remove the high-frequency components in the square wave signal while retaining its low-frequency or DC components. The low-pass filter circuit 40 can reduce or eliminate the noise or clutter generated by the square wave signal generating circuit 10, thereby ensuring that the signal transmitted to the on / off recognition circuit 20 is purer and more stable. The working principle of the low-pass filter circuit 40 is based on the weak conduction of high-frequency signals by capacitors and their conduction of DC or low-frequency signals. When the square wave signal output by the square wave signal generation circuit 10 passes through the low-pass filter circuit 40, the high-frequency components are absorbed by the capacitor and consumed on the ground wire, while the low-frequency or DC components can pass smoothly and be transmitted to the on / off recognition circuit 20. The filtering effect of the low-pass filter circuit 40 helps to reduce noise interference and improve the accuracy and reliability of the signal.

[0099] Furthermore, in this embodiment, the low-pass filter circuit 40 includes a fifth capacitor C5 and a ninth resistor R9, wherein:

[0100] The first terminal of the fifth capacitor C5 is connected to the first terminal of the ninth resistor R9 and the square wave signal generating circuit 10, respectively. The second terminal of the fifth capacitor C5 is connected to the second terminal of the first optocoupler IC1 and the first terminal of the second optocoupler IC2, respectively. The first terminal of the ninth resistor R9 is connected to the first terminal of the fifth capacitor C5 and the square wave signal generating circuit 10, respectively. The second terminal of the ninth resistor R9 is connected to the first terminal of the first optocoupler IC1 and the second terminal of the second optocoupler IC2, respectively.

[0101] It is easy to understand that, in this embodiment, to address the high-frequency noise problem in the output voltage signal of the square wave signal generation circuit 10, a low-pass filter circuit 40 is specifically designed and placed between the square wave signal generation circuit 10 and the on / off recognition circuit 20. The first terminal of the fifth capacitor C5 is connected to the first terminal of the ninth resistor R9, and also to the output terminal of the square wave signal generation circuit 10. In this way, the square wave signal can pass through the filter network composed of these two components. The second terminal of the fifth capacitor C5 is connected to the second terminal of the first optocoupler IC1 and the first terminal of the second optocoupler IC2, respectively. It should be noted that, since the input terminal of the optocoupler IC usually processes the signal (such as isolation, amplification, etc.), the second terminal of the ninth resistor R9 is connected to the first terminal of the first optocoupler IC1 and the second terminal of the second optocoupler IC2, respectively. In this way, the filtered signal can continue to be transmitted to the on / off recognition circuit 20 through the combination of resistor R9 and optocoupler IC. The primary function of the low-pass filter circuit 40 is to filter the square wave signal output from the square wave signal generator circuit 10 to remove high-frequency components, ensuring a cleaner and more stable signal transmitted to the on / off recognition circuit 20. Capacitors have weak conductivity for high-frequency signals but strong conductivity for DC or low-frequency signals; resistors attenuate signals of all frequencies, but the attenuation decreases as the frequency increases. Therefore, when the square wave signal passes through the low-pass filter circuit 40, high-frequency components are absorbed by the capacitor and consumed on the ground wire, while low-frequency or DC components can pass smoothly through the combination of resistor and capacitor and continue to be transmitted to the on / off recognition circuit 20.

[0102] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A handle button recognition circuit for a high-frequency host, characterized in that, This includes a handle button circuit located within the handle, and a square wave signal generation circuit and an on / off recognition circuit located within the high-frequency main unit, wherein: The square wave signal generating circuit is connected to the handle button circuit. The square wave signal generating circuit is used to generate a square wave signal and output it to the handle button circuit. The handle button circuit is connected to the on / off recognition circuit. The handle button circuit is used to acquire different button signals input by the user and output them to the on / off recognition circuit when continuously receiving the square wave signal. The on / off recognition circuit is used to identify the key commands corresponding to the different key signals.

2. The handle button recognition circuit of the high-frequency host as described in claim 1, characterized in that, The square wave signal generating circuit includes a signal generation circuit and a signal isolation circuit, wherein: The signal generation circuit is connected to the signal isolation circuit. The signal generation circuit is used to generate the square wave signal and output it to the signal isolation circuit. The signal isolation circuit is connected to the handle button circuit. The signal isolation circuit is used to filter out interference from the square wave signal and output the square wave signal after interference removal to the handle button circuit.

3. The handle button recognition circuit of the high-frequency host as described in claim 2, characterized in that, The signal generation circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, and a switching regulator chip, wherein: The first pin of the switching regulator chip is left floating. The second pin of the switching regulator chip is connected to the first terminal of the signal isolation circuit and the fifth resistor, respectively. The third pin of the switching regulator chip is grounded. The fourth pin of the switching regulator chip is left floating. The fifth pin of the switching regulator chip is connected to the first terminal of the first capacitor. The sixth pin of the switching regulator chip is connected to the first terminal of the third resistor. The seventh pin of the switching regulator chip is connected to the second terminal of the fourth resistor, the second terminal of the fifth resistor, and the first terminal of the sixth resistor, respectively. The eighth pin of the switching regulator chip is left floating. The ninth and sixteenth pins of the switching regulator chip are grounded. The tenth and eleventh pins of the switching regulator chip are left floating. The twelfth pin of the switching regulator chip is connected to the first terminal of the second resistor. The thirteenth pin of the switching regulator chip is connected to the first terminal of the first resistor. The fourteenth pin of the switching regulator chip is connected to the power supply. The fifteenth pin of the switching regulator chip is connected to the signal isolation circuit.

4. The handle button recognition circuit of the high-frequency host as described in claim 3, characterized in that, The signal isolation circuit includes a seventh resistor, a second capacitor, and a transformer, wherein: The first end of the primary winding of the transformer is connected to the second pin of the switching regulator chip; the second end of the primary winding of the transformer is connected to the first end of the seventh resistor, and the second end of the seventh resistor is connected to the power supply; the third end of the primary winding of the transformer is connected to the fifteenth pin of the switching regulator chip; the fourth end of the secondary winding of the transformer is connected to the first end of the second capacitor and the on / off identification circuit; the sixth end of the secondary winding of the transformer is connected to the second end of the second capacitor and the handle button circuit; and the fifth end of the secondary winding of the transformer is left floating.

5. The handle button recognition circuit of the high-frequency host as described in claim 1, characterized in that, The handle button circuit includes a first diode, a second diode, a first button switch, and a second button switch, wherein: The anode of the first diode is connected to the output terminal of the square wave signal generating circuit, and the cathode of the first diode is connected to the first terminal of the first push-button switch; the cathode of the second diode is connected to the output terminal of the square wave signal generating circuit, and the anode of the second diode is connected to the first terminal of the second push-button switch; the cathode of the first diode is connected to the anode of the second diode and the on / off recognition circuit.

6. The handle button recognition circuit of the high-frequency host as described in claim 1, characterized in that, The high-frequency host controller button recognition circuit also includes an MCU chip, and the on / off recognition circuit includes a first on / off circuit and a second on / off circuit, wherein: The first on / off circuit is connected to the handle button circuit and the first input terminal of the MCU chip respectively, and the second on / off circuit is connected to the handle button circuit and the second input terminal of the MCU chip respectively; The first on / off circuit is used to receive the button signal input from the handle button circuit, identify the button signal, and send it to the first input terminal of the MCU chip; The second on / off circuit is used to receive the button signal input from the handle button circuit, identify the button signal, and send it to the second input terminal of the MCU chip.

7. The handle button recognition circuit of the high-frequency host as described in claim 6, characterized in that, The first switching circuit includes a first optocoupler, a first transistor, a third capacitor, an eighth resistor, and a tenth resistor, wherein: The first end of the first optocoupler is connected to the handle button circuit, the second end of the first optocoupler is connected to the second on / off circuit, the third end of the first optocoupler is connected to the first end of the third capacitor and the first end of the tenth resistor, and the fourth end of the first optocoupler is connected to the power supply; the base of the first transistor is connected to the second end of the tenth resistor, the emitter of the first transistor is connected to the second end of the third capacitor and ground respectively, and the collector of the first transistor is connected to the second end of the eighth resistor and the first input terminal of the MCU chip respectively.

8. The handle button recognition circuit of the high-frequency host as described in claim 7, characterized in that, The second switching circuit includes a second optocoupler, a second transistor, a fourth capacitor, an eleventh resistor, and a twelfth resistor, wherein: The first end of the second optocoupler is connected to the second end of the first optocoupler, the second end of the second optocoupler is connected to the handle button circuit, the third end of the second optocoupler is connected to the first end of the fourth capacitor and the first end of the twelfth resistor, and the fourth end of the second optocoupler is connected to the power supply; the base of the second transistor is connected to the second end of the twelfth resistor, the emitter of the second transistor is connected to the second end of the fourth capacitor and ground, and the collector of the second transistor is connected to the second end of the eleventh resistor and the second input terminal of the MCU chip.

9. The handle button recognition circuit of the high-frequency host as described in claim 8, characterized in that, The high-frequency host controller button recognition circuit also includes a low-pass filter circuit, wherein: The low-pass filter circuit is connected to the square wave signal generating circuit and the on / off identification circuit, respectively, and is used to filter the square wave signal output by the square wave signal generating circuit and transmit the filtered square wave signal to the on / off identification circuit.

10. The handle button recognition circuit of the high-frequency host as described in claim 9, characterized in that, The low-pass filter circuit includes a fifth capacitor and a ninth resistor, wherein: The first terminal of the fifth capacitor is connected to the first terminal of the ninth resistor and the square wave signal generating circuit, respectively; the second terminal of the fifth capacitor is connected to the second terminal of the first optocoupler and the first terminal of the second optocoupler, respectively; the first terminal of the ninth resistor is connected to the first terminal of the fifth capacitor and the square wave signal generating circuit, respectively; the second terminal of the ninth resistor is connected to the first terminal of the first optocoupler and the second terminal of the second optocoupler, respectively.

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