Intelligent wireless medical foot switch circuit and device

Abstract

The utility model relates to the technical field of medical instruments, in particular to an intelligent wireless medical foot switch circuit and device, a control circuit is provided with a timer, and the control circuit identifies the conduction time of the switch circuit through the timer so as to control a first output end or a second output end to output a control signal. According to the utility model, one pedal switch is used for controlling a plurality of medical devices, so that a plurality of pedal switches are omitted, and the risk of mistakenly touching the plurality of pedal switches is avoided. And the first communication module and the second communication module can be wireless communication modules, so that the interference of a line of the wired foot switch on the examination work of a doctor is avoided, and the risk that the line is infected with bacteria is eliminated. And the control safety and the control efficiency of the medical equipment are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an intelligent wireless medical foot switch circuit and device. Background Art

[0002] In medical equipment, especially endoscopes, users need to use both hands to perform operations such as changing the patient's posture and shifting the inspection probe when capturing images. Therefore, when users need the endoscope to capture images, flush with water, or supply air, they often control it by stepping on different wired foot pedals.

[0003] However, this control method has several drawbacks. First, users performing endoscopic examinations are typically focused on the endoscopic image. For flushing, image acquisition, or video recording, they must look down to locate the wired foot pedal before pressing it. Furthermore, different foot pedals are required for different operations, increasing user inconvenience. Furthermore, the wires attached to the floor interfere with bed transfers and are prone to bacterial contamination. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes an intelligent wireless medical foot switch circuit and device, which solves the existing technical problems that when water flushing, image collection or video recording operations are required, the user has to lower his head to find the position of the wired foot pedal before stepping on it. Different operations require stepping on different wired foot pedals, which increases the inconvenience of user operation; moreover, the lead wire of the wired foot pedal on the ground not only interferes with the user's bed transfer, but is also prone to bacterial infection.

[0005] In a first aspect, the present invention provides an intelligent wireless medical foot switch circuit, the circuit comprising a switch, a control circuit, a first communication circuit, and a first power supply circuit; the first power supply circuit is connected to the control circuit and the first communication circuit, and is used to supply power to the control circuit and the first communication circuit;

[0006] The control circuit is provided with at least a first trigger terminal, a first output terminal, and a second output terminal; the first communication circuit is provided with a first input terminal and a second input terminal; the first trigger terminal is connected to the switch; the first output terminal is connected to the first input terminal; the second output terminal is connected to the second input terminal; and the first communication circuit is communicatively connected to a load device;

[0007] The control circuit is provided with a timer, and the control circuit identifies the on-time of the switch through the timer, thereby controlling the first output terminal or the second output terminal to output a control signal.

[0008] In some embodiments, the control circuit includes a main control module, an external interrupt module and a timer interrupt module.

[0009] The external interrupt module is connected to the first trigger terminal and is used to obtain and store the switch signal and change the external interrupt flag according to the switch signal;

[0010] The timer interrupt module includes a timer, and the timer performs identification counting and changes the timer interrupt flag according to the internal pulse signal or the external pulse signal;

[0011] The main control module is connected to the external interrupt module and the timer interrupt module, and is used to identify the signal of the switch according to the external interrupt flag and the timer interrupt flag, and output the control signal through the first output end or the second output end.

[0012] In some embodiments, the external interrupt module further includes a first register, which is used to receive and store an internal pulse signal or an external pulse signal. The first register is connected to the timer and outputs the internal pulse signal or the external pulse signal to the timer.

[0013] In some embodiments, the timer interrupt module also includes a clock oscillator and a 12-frequency divider. The pulse signal generated by the clock oscillator is divided by the 12-frequency divider and transmitted to the first register, and then transmitted to the timer through the first register; the timer identifies and counts the divided pulse signal and changes the timer interrupt flag.

[0014] In some embodiments, the external interrupt module is provided with a second register, the second register is connected to the first trigger end, and changes the value of the external interrupt flag bit according to the falling edge trigger of the first trigger end.

[0015] In some embodiments, the first power supply circuit is a rechargeable power supply battery, which is respectively connected to the first power supply terminal of the control circuit and the second power supply terminal of the first communication circuit, wherein the output voltage of the power supply battery is 3.3V-5V.

[0016] In some embodiments, the load device includes a second communication circuit, a drive device, a second power supply circuit and a step-down circuit, wherein the second power supply circuit is connected to a 220V mains supply, and the second power supply circuit is connected to the input ends of the drive device and the step-down circuit respectively, and the output end of the step-down circuit is connected to the second communication circuit;

[0017] The second communication circuit is communicatively connected to the first communication circuit, and the driving device is provided with a second communication terminal connected to the second communication circuit to receive signals from the first communication circuit.

[0018] In some embodiments, the first communication circuit and the second communication circuit are any one of a WiFi module, a Bluetooth module, a ZigBee module, a LoRa module and a 433 protocol module.

[0019] In a second aspect, the present invention provides an intelligent wireless medical foot switch device, comprising a housing, an elastic member, a switch, a power supply and a circuit board.

[0020] The shell includes a bottom shell body and a movable pedal, and the movable pedal is movably connected to the bottom shell body through an elastic member; the switch, the power supply and the circuit board are all fixed in the bottom shell body, and the switch is provided with a switch lever abutting the lower surface of the movable pedal; the circuit board is integrated with the above-mentioned intelligent wireless medical foot switch circuit, and the circuit board is electrically connected to the switch and the power supply through the intelligent wireless medical foot switch circuit.

[0021] In some embodiments, the bottom shell body includes an electrical part and a switch part that are connected to each other, and the height of the upper surface of the electrical part is higher than the height of the switch part to form a movable space for the movable pedal;

[0022] The power supply and the circuit board are arranged on the electrical appliance part, and the switch is fixed on the switch part.

[0023] In some embodiments, the switch portion is provided with a first connection seat and at least one first fixing hole, the first connection seat is provided adjacent to the electrical portion, and the first fixing hole is provided away from the electrical portion;

[0024] A second connecting seat and a second fixing hole are provided on the lower surface of the movable pedal. The second connecting seat is rotatably connected to the first connecting seat. The elastic member is connected between the first fixing hole and the second fixing hole. When the movable pedal rotates along the bottom shell body, it triggers the switch to turn on; a plurality of convex strips are also provided on the upper surface of the movable pedal, and an indicator light is also provided on the upper surface of the electrical part.

[0025] The present invention provides an intelligent wireless medical foot switch circuit and device, which has the following beneficial effects: the intelligent wireless medical foot switch circuit includes a switch, a control circuit, a first communication circuit, and a first power supply circuit; the control circuit is provided with at least a first trigger terminal, a first output terminal, and a second output terminal; the first communication circuit is provided with a first input terminal and a second input terminal, the first trigger terminal being connected to the switch, the first output terminal being connected to the first input terminal, and the second output terminal being connected to the second input terminal; the control circuit is provided with a timer, and the control circuit uses the timer to identify the on-time of the switch, thereby controlling the first output terminal or the second output terminal to output a control signal. The present invention uses a single foot switch to control multiple medical devices, eliminating the need for multiple foot switches and the risk of accidental activation of multiple foot switches. Furthermore, since the first and second communication modules can be wireless communication modules, interference with the doctor's examination work caused by wired foot switch wiring is avoided, and the risk of bacterial infection is eliminated. This effectively improves the control safety and efficiency of medical equipment.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the embodiments of the present invention, which can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a circuit diagram of the intelligent wireless medical foot switch circuit of Example 1 of the present utility model;

[0028] Figure 2 This is an internal structure diagram of the control circuit of Example 2 of the present utility model;

[0029] Figure 3 This is a circuit diagram of a load device according to Example 2 of the present utility model;

[0030] Figure 4 This is a structural diagram of an intelligent wireless medical foot switch device according to Example 3 of the present utility model;

[0031] Figure 5 This is a side sectional view of the intelligent wireless medical foot switch device according to Example 3 of the present utility model;

[0032] Figure 6 This is a cross-sectional view of the upper surface of the intelligent wireless medical foot switch device according to Example 3 of the present utility model;

[0033] Figure 7 This is a time classification diagram illustrating the intelligent wireless medical foot switch device according to Example 3 of the present utility model.

[0034] Reference numerals:

[0035] U1, control circuit; U2, first communication circuit; K1, first switch; U3, first power circuit; U4, drive device; U5, second communication circuit; 100, intelligent wireless medical foot switch; 1, shell; 2, bottom shell body; 3, movable pedal; 4, switch; 5, elastic member; 6, circuit board; 7, power supply; 21, electrical part; 22, switch part; 23, indicator light; 24, first connecting seat; 25, first fixing hole; 31, convex strip; 32, second connecting seat; 41, switch lever. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present invention and should not be regarded as an improper limitation on the present invention.

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific technical solutions of the present invention will be further described in detail below with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] In addition, in the embodiments of the present invention, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0040] In the embodiments of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0041] In the embodiments of the present invention, the terms "comprise", "include" or any other variations thereof are intended to cover non-exclusive inclusion. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0042] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0043] Example 1:

[0044] Figure 1 An embodiment of an intelligent wireless medical foot switch circuit is shown. The circuit includes a switch, a control circuit, a first communication circuit, and a first power supply circuit. The first power supply circuit is connected to the control circuit and the first communication circuit and is used to power the control circuit and the first communication circuit. The control circuit is provided with at least a first trigger terminal U1_P3.2 / INT0, a first output terminal U1_P0.0, and a second output terminal U1_P0.1. The first communication circuit is provided with a first input terminal U2_GPIO0 and a second input terminal U2_GPIO1. The first trigger terminal is connected to the switch, the first output terminal is connected to the first input terminal, the second output terminal is connected to the second input terminal, and the first communication circuit is communicatively connected to a load device. The control circuit is provided with a timer, and the control circuit identifies the on-time of the switch through the timer, thereby controlling the first output terminal or the second output terminal to output a control signal.

[0045] In this embodiment, the control circuit U1 can be a control chip, the first power supply circuit U3 can be a first power supply chip integrated with a rechargeable battery, and the first communication circuit U2 can be a first communication chip. The control circuit is provided with at least a first output terminal and a second output terminal. In addition, a third output terminal and a fourth output terminal can be provided in the control circuit. The control circuit controls the first output terminal, the second output terminal, the third output terminal, and the fourth output terminal to output control signals according to the conduction time of the switch. The utility model uses a foot switch to control multiple medical devices, eliminating the need for multiple foot switches and avoiding the risk of accidental touch of multiple foot switches. The first communication circuit is any one of a WiFi module, a Bluetooth module, a ZigBee module, a LoRa module, and a 433 protocol module. This prevents the wired foot switch line from interfering with the doctor's examination work and eliminates the risk of bacterial infection in the line. It effectively improves the control safety and control efficiency of medical equipment.

[0046] In one implementation of the above embodiment, the control circuit uses STC89C52. The positive electrode of the first power supply circuit is connected to the VCC pins of the control circuit and the first communication circuit, and the negative electrode of the first power supply circuit is connected to the GND pins of the control circuit and the first communication circuit to form a common ground terminal. One end of the switch is connected to the external interrupt pin P3.2 / INT0 of the microcontroller, and the other end of the switch is connected to the common ground terminal. When the switch is pressed, the microcontroller detects the falling edge level of the external interrupt pin and starts the timer. The I / O pins P0.0-P0.3 of the control circuit are respectively connected to the GPIO0-GPIO3 pins of the first communication circuit. When the classification result Y (Y=1, 2, 3, 4) is obtained, the control circuit controls P0.(Y-1) to output a falling edge level. After the first trigger end detects the falling edge level of the GPIO(Y-1) pin, it sends a wireless signal to the Yth wireless receiver.

[0047] Example 2:

[0048] In some embodiments, see Figure 2 The control circuit includes a main control module, an external interrupt module and a timer interrupt module. The external interrupt module is connected to the first trigger end, and is used to obtain and store the switch signal and change the external interrupt flag IE0 according to the switch signal; the timer interrupt module includes a timer, and the timer identifies and counts according to the internal pulse signal or the external pulse signal and changes the timer interrupt flag TF0; the main control module is connected to the external interrupt module and the timer interrupt module, and is used to identify the signal of the switch according to the external interrupt flag and the timer interrupt flag, and output the control signal through the first output end or the second output end.

[0049] In some embodiments, the external interrupt module further includes a first register T0, which is used to receive and store an internal pulse signal or an external pulse signal. The first register is connected to the timer and outputs the internal pulse signal or the external pulse signal to the timer. The timer interrupt module further includes a clock oscillator and a 12-frequency divider. The pulse signal generated by the clock oscillator is divided by the 12-frequency divider and transmitted to the first register, and then transmitted to the timer through the first register. The timer identifies and counts the divided pulse signal and changes the timer interrupt flag.

[0050] In some embodiments, the external interrupt module is provided with a second register IT0, the second register is connected to the first trigger end, and changes the value of the external interrupt flag bit according to the falling edge trigger of the first trigger end.

[0051] In this embodiment, the control circuit of the present application can be integrated into a control chip, that is, the control chip can be provided with a main control module, an external interrupt module, and a timer interrupt module. The structure of the control chip can realize that the external interrupt is triggered by the first trigger terminal P3.2 / INT0. The first trigger terminal can have two trigger modes: when the second register is set to 0, it is a low-level trigger mode; when the second register is set to 1, it is a falling-edge trigger mode. In this example, the second register is set to 1, that is, the falling-edge trigger mode is selected. When the first trigger terminal detects a falling edge level, the external interrupt flag is set to 1, and the external interrupt 0 service routine is entered.

[0052] The control chip's timer interrupt has two clock sources. When the first register is set to 0, the internal clock source is used; when the first register is set to 1, the external clock source is the P3.4 / T0 pin. In this example, the first register is set to 0, which selects the internal clock source. First, the clock oscillator inside the control chip generates a 12MHz pulse signal, which is then divided by a 12-bit divider into a 1MHz pulse signal and sent to the timer. Every time the timer detects a pulse signal, the 16-bit first register counts up by 1. When the first register count overflows, the timer interrupt flag is set to 1, and the timer interrupt 0 service routine is entered. In this example, the initial value of the first register is set to 64536, which means that a timer interrupt is generated every (65536-64536) = 1000us = 1ms. In the timer interrupt 0 service routine, a global integer variable t is used to count the number of timer interrupts. Based on the level of the first trigger terminal P3.2 / INT0 (a low level indicates the foot switch is pressed, and a high level indicates the foot switch is released), the variable t is initialized and the timer is turned on or off. This allows the variable t to record the duration (in milliseconds) of the foot switch being pressed or released. The main control chip controls the first or second output terminal signal by identifying the variable t.

[0053] In some embodiments, the switch includes a first switch K1, a first connection terminal of the first switch connected to the first trigger terminal, and a second connection terminal of the first switch connected to ground. The first switch is integrated into the switch and connected to the first trigger terminal of the control circuit via a connecting circuit. The switch includes a switch base and a switch lever. The switch base is mounted on the bottom plate of the smart wireless medical foot switch device, and the switch lever is connected to the panel of the smart wireless medical foot switch device. When the panel is pressed downward, the switch lever and the switch base are closed.

[0054] In some embodiments, the first power circuit is a rechargeable battery, which is connected to the first power terminal U1_VCC of the control circuit and the second power terminal U2_VCC of the first communication circuit. In this embodiment, the battery can be on a power supply, which can also be provided with a PCB board, and the PCB board has a charging interface. The charging interface is electrically connected to the circuit board integrating the intelligent wireless medical foot switch circuit via a connecting line.

[0055] In some embodiments, see Figure 3 The load device includes a second communication circuit U5, a driver device U4, a second power supply circuit, and a step-down circuit. The second power supply circuit is connected to 220V AC power and is respectively connected to the input terminals of the driver device and the step-down circuit. The output terminal of the step-down circuit is connected to the second communication circuit. The second communication circuit is in communication with the first communication circuit, and the driver device is provided with a second communication terminal connected to the second communication circuit to receive signals from the first communication circuit. The driver device can be an endoscope for image acquisition, water flushing, or air delivery. The second communication circuit can be any of a WiFi module, a Bluetooth module, a ZigBee module, a LoRa module, and a 433 protocol module. The second communication circuit is in communication with the first communication circuit to receive control signals from the first communication circuit to control the driver device to perform corresponding actions. The second power supply circuit can be 220V AC power. In a specific example, the load device is generally powered by a 220V AC power supply. The positive terminal of the 220V power supply is connected to the power pin (input) of the medical device, and the negative terminal of the power supply is connected to the GND pin of the load device to form a common ground. The second communication circuit of this example uses a JDY-40 model 2.4GHz wireless serial port transparent transmission module. The VCC pin of the second communication circuit is connected to the VCC (3.3-5V output) pin of the medical device, and the GND pin of the second communication circuit is connected to the common ground terminal. The GPIO0 pin of the second communication circuit is connected to the second communication terminal of the medical device. When the wireless receiver Y receives the wireless signal sent by the wireless transmitter, the second communication circuit controls the GPIO0 output falling edge level. After the medical device Y detects the falling edge level of the first trigger terminal, it controls the switch of the medical device. The step-down circuit can reduce the 220V voltage to 3V-5V voltage through any chip such as LM2596, ADP2300, MP2307, etc., and supply power to the second communication circuit. In addition, the driving device can set different voltage input sources according to the actual execution steps, such as 220V or 3V-5V; to achieve operations such as water flushing, image collection or video recording.

[0056] In some embodiments, the first communication circuit and the second communication circuit are any one of a WiFi module, a Bluetooth module, a ZigBee module, a LoRa module and a 433 protocol module.

[0057] Example 3:

[0058] Figure 4-7 An embodiment of an intelligent wireless medical foot switch device is shown. The intelligent wireless medical foot switch device includes a housing 1, an elastic member 5, a switch 4, a power supply 7, and a circuit board 6. The housing 1 includes a bottom shell body 2 and a movable pedal 3, and the movable pedal 3 is movably connected to the bottom shell body 2 via the elastic member 4; the switch 4, the power supply 7, and the circuit board 6 are all fixed in the bottom shell body, and the switch is provided with a switch lever that abuts the lower surface of the movable pedal; the circuit board is integrated with the above-mentioned intelligent wireless medical foot switch circuit, and the circuit board is electrically connected to the switch and power supply through the intelligent wireless medical foot switch circuit. In this embodiment,

[0059] The intelligent wireless medical foot switch circuit includes a switch, a control circuit, a first communication circuit, and a first power supply circuit. The intelligent wireless medical foot switch circuit can be provided with a switch interface and a power supply interface on a circuit board. The switch interface is connected to the switch of the intelligent wireless medical foot switch circuit, and the power supply is connected to the power supply via the power supply interface. The control circuit and the first communication circuit can be integrated into the circuit board. The control circuit is used to obtain and identify the switch signal and transmit the switch signal to the load device via the first communication circuit. The control circuit is also provided with a timer, which uses the timer to identify the on-time of the switch and thereby control the output of the control signal at the first output terminal or the second output terminal.

[0060] In some embodiments, the bottom housing 2 includes an interconnected electrical section 21 and a switch section 22. The top surface of the electrical section 21 is higher than the switch section to create a space for the movable pedal. A power supply 7 and a circuit board 6 are located within the electrical section, and the switch is secured to the switch section. In this embodiment, the switch section is located at the end of the housing closest to the user, while the electrical section is located at the end away from the user. The electrical and switch sections can be integrally formed. Furthermore, an electrical cover can be provided on the top surface of the electrical section, allowing for installation, inspection, and maintenance of the circuit board and related electrical components. A power supply cover can be provided on the bottom surface of the electrical section. The power supply cover and the electrical section can form a cavity for mounting the power supply, which can be four AA rechargeable batteries. A connection port can also be provided on the surface of the electrical section. One end of the connection port is electrically connected to the circuit board, and the other end can be used for communication with a load device or for electrical connection to a charging device. A charging circuit can be provided on the circuit board to charge the power supply.

[0061] In some embodiments, the switch portion 22 is provided with a first connection seat 24 and at least one first fixing hole 25. The first connection seat 24 is provided adjacent to the electrical portion, and the first fixing hole is provided away from the electrical portion. A second connection seat and a second fixing hole are provided on the lower surface of the movable pedal. The second connection seat is rotatably connected to the first connection seat. The elastic member is connected between the first fixing hole and the second fixing hole. When the movable pedal rotates along the bottom shell body, the switch is triggered to conduct. Figure 5-6 Two first connecting seats 24 are provided at one end of the switch portion 22, and two first fixing holes 25 are provided at the other end of the switch portion 22. A second connecting seat 32 is provided on the lower surface of the movable pedal 3, which is rotatably connected to the first connecting seat. The first and second connecting seats can be rotatably connected via a connecting shaft. Two fixing holes are provided at the other end of the movable pedal. The elastic member can be a spring, with one end of the elastic member fixedly positioned in the first fixing hole and the other end fixedly positioned in the second fixing hole. This ensures that when the movable pedal is subjected to force to compress the elastic member, one end of the movable pedal rotates along the bottom shell body, thereby triggering the switch lever of the switch.

[0062] In another embodiment of the above embodiment, the switch portion may be provided with four first fixing holes, one at each of the four corners of the switch portion; the movable pedal may be provided with four second fixing holes, the second fixing holes being opposite the first fixing holes; the number of elastic members may be four, and the elastic members may be connected between the four first fixing holes and the second fixing holes; and the movable pedal may be supported by the elastic members.

[0063] A plurality of ridges 31 are also provided on the upper surface of the movable pedal 3 to increase the friction of the movable pedal 3. An indicator light 23 is also provided on the upper surface of the electrical part 21 to realize the indicator light colors corresponding to different instructions.

[0064] In this embodiment, the controller includes a timer and a time classifier, and the switch is connected to the controller. The controller has a built-in PCB board, and a control chip is provided on the PCB board. The control chip can be a chip with the model number STC89C52. When the foot switch is stepped on, the spring is compressed, the switch is pressed, the switch is closed, and the detection pin of the controller detects the change in the electrical level and starts or ends timing; when the foot switch is released, the spring returns to its original length, the switch is released, the switch circuit is disconnected, and the timer ends or starts timing. The timer inputs the recorded duration into the time classifier, and the classifier outputs the classification result according to the duration. The wireless transmitter is connected to the controller, and the controller sends a control signal to the corresponding transmission pin of the wireless transmitter according to the classification result, and then controls the wireless transmitter to send a wireless signal to the corresponding wireless receiver, thereby controlling the corresponding medical device.

[0065] Time classifier, the input is the duration t, and the output is the classification result Y. Figure 7 As shown in the figure, when the switch is released, the switch circuit is open and the level of the controller detection pin is high. When the switch is pressed, the switch circuit is closed and the level of the detection pin is low. The foot-pressing mode is divided into single-click mode and continuous-click mode.

[0066] The single-click mode is a mode in which the foot switch is stepped on once, including a short single-click mode (Y=1) and a long single-click mode (Y=2). The illustrations thereof are as follows: Figure 7 (a) and Figure 7 (b). Assume t 1_low The time interval from the first pressing of the switch to the release of the switch is as follows:

[0067] Y=1,T quick ≤t 1_low <T slow

[0068] Y=2,t 1_low ≥T slow

[0069] Where T quick Is a threshold value. When the switch is pressed for a duration greater than or equal to this threshold value, it is classified as a single-click mode. Otherwise, it is classified as a continuous click mode. slow is a threshold value. When it is classified as a single-click mode, if the duration of the switch being pressed is less than the threshold value, it is classified as a short-click mode; otherwise, it is classified as a long-click mode.

[0070] The combo mode includes two or more combo modes. Here, this example takes the double combo mode (Y=3) and the triple combo mode (Y=4) as examples, and the rest of the combo modes are similar. The illustrations of the double combo mode and the triple combo mode are as follows: Figure 7 (c) and Figure 7 (d) Assume t i_low is the time from the switch being pressed down to being released for the i-th time, t i_high is the time it takes for the switch to be released and then pressed for the i-th time. The classification method of the time classifier is as follows:

[0071] Y=3,(t 1_low <T quick )&&(t 2_low <T quick )&&(t 1_high

[0072] <T quick )&&(t 2_high ≥T quick )

[0073] Y=4,(t 1_low <T quick )&&(t 2_low <T quick )&&(t 3_low

[0074] <T quick )&&(t 1_high <T quick )&&(t 2_high

[0075] <T quick )&&(t 3_high ≥T quick )

[0076] The remaining cases are classified as invalid mode. Based on the classification result, the controller sends a control signal to the corresponding transmit pin of the wireless transmitter. Specifically, when the classification result Y is i, the controller sends a control signal to the i-th transmit pin of the wireless transmitter, which in turn sends a wireless signal to the corresponding wireless receiver, controlling the corresponding medical device. When the classification result is invalid mode, the wireless transmitter does not transmit a signal.

[0077] In this example, when the switch is pressed, the first trigger terminal detects a falling edge in the voltage level, and the interrupt service routine for external interrupt 0 is entered. The controller starts timer 0 and is set to enter the timer 0 interrupt service routine every 1ms. In the timer 0 interrupt service routine, the voltage level of the external interrupt 0 pin is detected. If it is low, the global integer variable t is incremented by 1, that is, t is the duration t when the switch is first pressed. 1_low ; If it is high, detect t1_low Is it greater than or equal to T quick If it is, it means that this time the foot-stepping action is single-click mode, get the classification result, and stop the timer; otherwise, reset t to 0, and use t to time the subsequent time t when the switch is released and stepped on in the same way. 1_high ,t 2_low ,…t i_high , until the classification result is obtained, stop the timer.

[0078] The time-based classification methods are as follows:

[0079] Y=1,T quick ≤t 1_low <T slow

[0080] Y=2,t 1_low ≥T slow

[0081] Y=3,(t 1_low <T quick )&&(t 2_low <T quick )&&(t 1_high

[0082] <T quick )&&(t 2_high ≥T quick )

[0083] Y=4,(t 1_low <T quick )&&(t 2_low <T quick )&&(t 3_low

[0084] <T quick )&&(t 1_high <T quick )&&(t 2_high

[0085] <T quick )&&(t 3_high ≥T quick )

[0086] where t i_low Indicates the time from the switch being pressed down to being released for the i-th time, t i_high is the time it takes for the foot switch to be released and then pressed for the i-th time. quick is a threshold value, which is set to 500ms in this example. 1_low ≥T quick When it is classified as single-shot mode, otherwise it is classified as combo mode. slow Is a greater than Tquick The threshold is set to 1s in this example. 1_low ≥T quick If t 1_low <T slow It is classified as short click mode, otherwise t 1_low ≥T slow Classified as long click mode.

[0087] For the combo mode, the duration of the switch being pressed and released for the first few times is required to be less than T quick , and the time for the last switch release is greater than or equal to T quick This example only illustrates the double-click mode and the triple-click mode. The same applies to other combos. For the double-click mode, the duration of the first two presses and the duration of the first release of the switch are required to be t 1_low ,t 2_low ,t 1_high Both are smaller than T quick , the duration of the second release t 2_high Greater than T quick For the triple-click mode, the time it takes for the switch to be pressed for the first three times and released for the first two times is t 1_low ,t 2_low ,t 3_low ,t 1_high ,t 2_high Both are smaller than T quick , the duration of the third release t 2_high Greater than T quick .

[0088] This utility model uses a single foot switch to control multiple medical devices, eliminating the need for multiple foot switches and the risk of accidental activation. Furthermore, since the first and second communication modules can be wireless, interference with the doctor's examination by wired foot switch wiring is avoided, and the risk of bacterial infection is eliminated. This effectively improves the control safety and efficiency of medical equipment.

[0089] The serial numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of the present invention and do not limit the scope of the patent of the present invention. Any equivalent device or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. An intelligent wireless medical foot switch circuit, characterized in that: The circuit includes a switch, a control circuit, a first communication circuit and a first power supply circuit; the first power supply circuit is connected to the control circuit and the first communication circuit, and is used to supply power to the control circuit and the first communication circuit; The control circuit is provided with at least a first trigger terminal, a first output terminal, and a second output terminal; the first communication circuit is provided with a first input terminal and a second input terminal; the first trigger terminal is connected to the switch; the first output terminal is connected to the first input terminal; the second output terminal is connected to the second input terminal; and the first communication circuit is communicatively connected to a load device; The control circuit is provided with a timer, and the control circuit identifies the on-time of the switch through the timer, thereby controlling the first output terminal or the second output terminal to output a control signal.

2. The intelligent wireless medical foot switch circuit according to claim 1, characterized in that: The control circuit includes a main control module, an external interrupt module and a timer interrupt module. The external interrupt module is connected to the first trigger terminal and is used to obtain and store the switch signal and change the external interrupt flag according to the switch signal; The timer interrupt module includes a timer, and the timer performs identification counting and changes the timer interrupt flag according to the internal pulse signal or the external pulse signal; The main control module is connected to the external interrupt module and the timer interrupt module, and is used to identify the signal of the switch according to the external interrupt flag and the timer interrupt flag, and output the control signal through the first output end or the second output end.

3. The intelligent wireless medical foot switch circuit according to claim 2, characterized in that: The external interrupt module further includes a first register, which is used to receive and store an internal pulse signal or an external pulse signal. The first register is connected to the timer and outputs the internal pulse signal or the external pulse signal to the timer.

4. The intelligent wireless medical foot switch circuit according to claim 3, characterized in that: The timer interrupt module also includes a clock oscillator and a 12-frequency divider. The pulse signal generated by the clock oscillator is divided by the 12-frequency divider and transmitted to the first register, and then transmitted to the timer through the first register; the timer identifies and counts the divided pulse signal and changes the timer interrupt flag.

5. The intelligent wireless medical foot switch circuit according to claim 2, characterized in that: The external interrupt module is provided with a second register, which is connected to the first trigger end and changes the value of the external interrupt flag bit according to the falling edge trigger of the first trigger end.

6. The intelligent wireless medical foot switch circuit according to claim 2, characterized in that: The first power supply circuit is a rechargeable power supply battery, which is respectively connected to the first power supply terminal of the control circuit and the second power supply terminal of the first communication circuit, wherein the output voltage of the power supply battery is 3.3V-5V.

7. The intelligent wireless medical foot switch circuit according to claim 2, characterized in that: The load device includes a second communication circuit, a driving device, a second power supply circuit and a step-down circuit, wherein the second power supply circuit is connected to a 220V mains power supply, and the second power supply circuit is connected to the input end of the driving device and the step-down circuit respectively, and the output end of the step-down circuit is connected to the second communication circuit; The second communication circuit is communicatively connected to the first communication circuit, and the driving device is provided with a second communication terminal connected to the second communication circuit to receive the signal of the first communication circuit; wherein the first communication circuit and the second communication circuit are any one of a WiFi module, a Bluetooth module, a ZigBee module, a LoRa module and a 433 protocol module.

8. An intelligent wireless medical foot switch device, characterized in that: It includes a housing, an elastic member, a switch, a power supply and a circuit board. The shell includes a bottom shell body and a movable pedal, and the movable pedal is movably connected to the bottom shell body through an elastic member; the switch, the power supply and the circuit board are all fixed in the bottom shell body, and the switch is provided with a switch lever abutting against the lower surface of the movable pedal; the circuit board is integrated with the intelligent wireless medical foot switch circuit according to any one of claims 1 to 7, and the circuit board is electrically connected to the switch and the power supply through the intelligent wireless medical foot switch circuit.

9. The intelligent wireless medical foot switch device according to claim 8, characterized in that: The bottom shell body includes an electrical part and a switch part that are connected to each other, and the height of the upper surface of the electrical part is higher than that of the switch part to form a movable space for the movable pedal; The power supply and the circuit board are arranged on the electrical appliance part, and the switch is fixed on the switch part.

10. The intelligent wireless medical foot switch device according to claim 9, characterized in that: The switch part is provided with a first connecting seat and at least one first fixing hole, the first connecting seat is arranged adjacent to the electrical part, and the first fixing hole is arranged away from the electrical part; A second connecting seat and a second fixing hole are provided on the lower surface of the movable pedal. The second connecting seat is rotatably connected to the first connecting seat. The elastic member is connected between the first fixing hole and the second fixing hole. When the movable pedal rotates along the bottom shell body, the switch is triggered to turn on. The upper surface of the movable pedal is further provided with a plurality of convex strips, and the upper surface of the electrical part is further provided with an indicator light.

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