Touch control circuit for baking lamp of physiotherapy instrument

Abstract

The utility model discloses a physiotherapy instrument baking lamp touch control circuit comprising a power supply module, a control module, a heating module, a button input module, a display module, a buzzer alarm module and a safety protection module. The power supply module converts alternating current into stable direct current to be supplied to the system through a rectifier bridge and a filter capacitor. The control center is composed of a single-chip microcomputer and cooperates with an LED driving chip to achieve coordinated management of all the modules. The heating module adjusts the conduction time of a silicon controlled rectifier through a PWM signal, and provides four power output modes to adapt to different temperature requirements. A user can set treatment time and select temperature gears through the touch keys, and set information is fed back in real time through the nixie tube and the state indicator lamp. And the buzzer gives out a sound prompt when starting up and treatment is finished, so that the user experience is enhanced. In addition, the equipment is provided with a mechanical toppling switch, a heating source is automatically cut off once it is detected that the inclination of the equipment exceeds a threshold value, meanwhile, the equipment is further provided with an infrared receiving module, and remote control can be achieved.

Description

Technical Field

[0001] This utility model relates to a touch control circuit for a physiotherapy lamp, belonging to the field of electronic equipment control technology. Background Technology

[0002] Existing physiotherapy lamp control systems typically use simple mechanical switches or relays for power adjustment, which cannot achieve precise temperature control and lacks intelligent functions such as remote control, power-off memory, and dynamic temperature compensation. Furthermore, traditional control methods are prone to excessive temperature fluctuations or overheating, affecting the therapeutic effect and even posing safety hazards. Therefore, providing an intelligent, precise, safe, and reliable physiotherapy lamp control circuit has significant application value. Utility Model Content

[0003] The purpose of this invention is to provide a touch control circuit for a physiotherapy lamp, which can effectively solve the above-mentioned problems.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] It includes a power supply module, a control module, a heating module, a key input module, a display module, a buzzer alarm module, and a safety protection module;

[0006] The power module includes: a resistor-capacitor step-down circuit, a rectifier circuit, a filter circuit, a voltage regulator circuit, and a zero-crossing detection circuit;

[0007] The resistor-capacitor step-down circuit is used to step down the input AC power, including a current-limiting resistor (RS1) and a step-down capacitor (C1); and resistors R1 and R2 ensure that the step-down capacitor C1 discharges quickly after the power is disconnected to prevent electric shock hazard.

[0008] The rectifier circuit includes a rectifier bridge U2 (MB6SU), which is used to convert the stepped-down AC power into pulsating DC power for use by the entire control circuit.

[0009] The filter circuit includes a filter capacitor E1 to reduce ripple and provide a smooth DC output.

[0010] The voltage regulator circuit uses two Zener diodes (D5 and D6) to provide a stable low-voltage output;

[0011] The zero-crossing detection circuit divides the signal through resistors R8, R9, R10, and R11, and inputs it to the base of transistor Q4 (MMBT5551). When the AC voltage crosses zero, the base voltage is lower than the conduction threshold of transistor Q4, and Q4 is turned off, thus realizing the opening or closing of the thyristor Q3.

[0012] The control module includes a microcontroller U3 (SC8F2892B) and an LED driver chip U1 (TM1617). The microcontroller U3 is used to process user input, control the power of the heating lamp and monitor the temperature, and the LED driver chip U1 is used to control the digital tube (LED1) to display the temperature and time information set by the user.

[0013] The heating module includes an optocoupler U4 (MOC3022) and a silicon controlled rectifier Q3 (BT136600E_B). The microcontroller U3 drives the silicon controlled rectifier Q3 through the optocoupler U4, receives the PWM signal from the control module, adjusts the power output of the heating tube, and realizes the control of the heating lamp.

[0014] The touch input module includes touch buttons KEY1, KEY2, and KEY3; KEY1 is configured as a time button, KEY2 as a temperature button, and KEY3 as a start button, which are sequentially connected to the RB4 / KEY4, RB3 / KEY3, and RB2 / KEY2 pins of the microcontroller U3 for setting the treatment time, temperature level, and device power on / off; and an external capacitor C11 is provided at the CPA pin of the microcontroller U3.

[0015] The display module includes a digital tube LED1 and status indicator lights (D1-D5), driven by the display LED driver chip U1, and is used to display treatment time and temperature level;

[0016] The buzzer alarm module is connected to the control module and is used for power-on prompts and treatment completion alarms;

[0017] The safety protection module is connected to the control module and is used to shut off the heating element when the machine is tipped over.

[0018] Furthermore, the heating module has four temperature settings, which are arranged in ascending order of power: warm (70% power, running for 1 minute and then pausing for 25 seconds to cycle), low (80% power, running for 1 minute and then pausing for 15 seconds to cycle), medium (90% power, running for 1 minute and then pausing for 7 seconds to cycle), and high (100% power). Each setting is matched with a status indicator light; D2 is the warm setting, D3 is the low setting, D4 is the medium setting, and D5 is the high setting.

[0019] Furthermore, the control module controls the conduction state of the heating module through a thyristor to achieve adjustment of different power levels.

[0020] Furthermore: the treatment time is cycled through the time setting button, and the digital LED1 is used to display the set treatment time in real time; the first press displays 30 minutes; the second press displays 60 minutes; the third press displays "--" (continuous operation); the fourth press returns to standby mode (displays 00, heating off).

[0021] Furthermore: the tilt protection switch of the safety protection module is mechanical or electronic, and automatically cuts off the power supply to the heating module when the tilt angle of the equipment exceeds the set threshold; the safety protection module adopts a tilt switch (bent angle) of model Rbs070410b or a tilt switch (right angle) of model Rbs070310b.

[0022] Furthermore, the microcontroller U3 can be connected to an external infrared receiver module (IR-SP) to enable infrared remote control of the device.

[0023] The beneficial effects are:

[0024] 1. Using a new microcontroller model, KEY1, KEY2, and KEY3 are configured as touch control buttons and connected sequentially to the RB4 / KEY4, RB3 / KEY3, and RB2 / KEY2 pins of microcontroller U3. When a button is pressed, the change in capacitance value is detected by the microcontroller's internal ADC (analog-to-digital converter) and converted into a corresponding input signal to achieve touch control.

[0025] 2. The external capacitor C11 can make the ADC (analog-to-digital converter) inside the microcontroller detect more accurately.

[0026] 3. The treatment time and temperature level can be cycled through the touch button input module. The set parameters are displayed in real time by the digital tube and status indicator lights, making the operation simple and intuitive for users and improving the user experience.

[0027] 4. Equipped with an infrared receiver module, enabling remote control. Attached Figure Description

[0028] For ease of explanation, this utility model is described in detail below with reference to specific embodiments and accompanying drawings.

[0029] Figure 1 This is the circuit schematic diagram of this utility model;

[0030] Figure 2 This is the microcontroller circuit diagram of this utility model;

[0031] Figure 3 The power supply and rectification / filtering circuit diagram of this utility model;

[0032] Figure 4 This is a circuit diagram of the heating module of this utility model;

[0033] Figure 5 This is a circuit diagram of the display module of this utility model;

[0034] Figure 6 This is a circuit diagram of the LED driver chip of this utility model;

[0035] Figure 7 This is the circuit diagram of the buzzer of this utility model;

[0036] Figure 8 This is a circuit diagram of the installation protection module of this utility model;

[0037] Figure 9 This is a circuit diagram of the infrared receiving module of this utility model. Detailed Implementation

[0038] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms “first,” “second,” “third,” etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0041] Furthermore, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] See Figure 1-9 This is one embodiment of the touch control circuit for a physiotherapy lamp of this utility model.

[0043] It includes a power supply module, a control module, a heating module, a key input module, a display module, a buzzer alarm module, and a safety protection module. The specific structure and working principle are as follows:

[0044] Power module:

[0045] The power supply module includes a rectifier bridge U2 and a filter capacitor E1. The rectifier bridge U2 is an MB6SU model rectifier bridge used to convert the input 220V AC power into DC power. The filter capacitor E1 is a 470μF / 16V electrolytic capacitor used to smooth the DC voltage and provide a stable DC power supply for the entire control circuit.

[0046] The power supply module further includes: a resistor-capacitor (RC) step-down circuit for stepping down the input AC power, comprising a current-limiting resistor and a step-down capacitor connected in series; a rectifier circuit connected to the RC step-down circuit for converting the AC power into pulsating DC power; a filter circuit connected to the rectifier circuit for smoothing the pulsating DC power; a voltage regulator circuit connected to the filter circuit for outputting a stable DC voltage to power the control circuit; and a zero-crossing detection circuit for detecting the zero-crossing point of the AC power and providing a zero-crossing signal to the thyristor Q3 trigger circuit to ensure that the thyristor is turned on or off at the zero-crossing point.

[0047] Control module:

[0048] The control module includes a microcontroller U3 and an LED driver chip U1. The microcontroller U3 is an SC8F2892B microcontroller used to receive signals from the key input module, control the power output of the heating module, monitor the temperature, and coordinate the operation of each module. The LED driver chip U1 is a TM1617 chip used to drive the digital tube LED1 and status indicator lights D1-D5 in the display module to display the treatment time and temperature level set by the user.

[0049] Heating module:

[0050] The heating module includes an optocoupler U4 and a silicon controlled rectifier (SCR) Q3. Optocoupler U4 is a MOC3022, and SCR Q3 is a BT136600E_B. The microcontroller U3 drives the SCR Q3 via a PWM signal through optocoupler U4, adjusting the conduction time of the heating element to achieve precise control of the heating power. The heating module has four temperature settings:

[0051] Warm setting: Power 70%, runs for 1 minute, then stops for 25 seconds, repeats continuously;

[0052] Low temperature setting: 80% power, runs for 1 minute, then stops for 15 seconds, repeats continuously;

[0053] Medium temperature setting: 90% power, runs for 1 minute, then stops for 7 seconds, repeats continuously;

[0054] High temperature setting: 100% power, continuous operation.

[0055] The above gears correspond to the status indicator lights D2 (warm), D3 (low temperature), D4 (medium temperature), and D5 (high temperature), respectively.

[0056] Heating control implementation method:

[0057] Optocoupler isolation (U4, MOC3022): Used to isolate low-voltage control circuits (MCU) from high-voltage AC parts to prevent interference.

[0058] When the MCU (U3, SC8F2892B) outputs a high-level signal, the internal LED of the optocoupler conducts, triggering the SCR BT136 to conduct, thus powering the heating lamp. Trigger resistor (R6): limits the optocoupler's output current and protects the SCR gate.

[0059] The heating power is adjusted by controlling the on / off state of the optocoupler through PWM or switching signals; the temperature is adjusted by adjusting the duty cycle through the buttons (KEY1, KEY2).

[0060] Keypad input module:

[0061] The touch input module includes touch buttons KEY1, KEY2, and KEY3; KEY1 is configured as a time button, KEY2 as a temperature button, and KEY3 as a start button, which are connected sequentially to the RB4 / KEY4, RB3 / KEY3, and RB2 / KEY2 pins of the microcontroller U3 for setting the treatment time, temperature level, and device power on / off; and an external capacitor C11 is connected at the CPA pin of the microcontroller U3.

[0062] When a finger touches KEY1 / KEY2 / KEY3, the local electric field changes, causing a change in capacitance. This change in capacitance is detected by the ADC (Analog-to-Digital Converter) inside the (SC8F2892) microcontroller and converted into a corresponding input signal; an external capacitor C11 can make the ADC's detection more accurate.

[0063] The specific steps are as follows:

[0064] Switch settings: When connected to 220V voltage, the buzzer sounds once and the KEY3 indicator light illuminates; when the KEY3 indicator light is touched, the corresponding digital display shows 00.

[0065] Time setting: Press the time button KEY1 to cycle through the treatment time. The first press displays 30 minutes, the second press displays 60 minutes, the third press displays "--" (continuous operation), and the fourth press returns to standby mode (displays "00", heating is off).

[0066] Temperature setting: Press the temperature button KEY2 to cycle through the temperature settings in the following order: high temperature (100% power), medium temperature (90% power), low temperature (80% power), and warm temperature (70% power). Press it again to return to the high temperature setting.

[0067] Display module:

[0068] The display module includes a digital tube LED1 and status indicator lights D1-D5, driven by an LED driver chip U1. The digital tube LED1 displays the set treatment time in real time, status indicator lights D1 are the power indicator, and D2-D5 correspond to four temperature levels, indicating the current operating status.

[0069] Buzzer alarm module:

[0070] The buzzer alarm module is connected to the U3 microcontroller and is used for power-on prompts and treatment completion alarms. When the device is powered on, the buzzer sounds once; after the treatment time ends, the buzzer sounds three times, and the digital tube displays "00".

[0071] Security protection module:

[0072] The safety protection module includes a tilt protection switch connected to the microcontroller U3, used to detect the tilting state of the equipment and cut off the power supply to the heating module. In this embodiment, the tilt protection switch can be a mechanical tilt switch of model Rbs070410b (angle) or Rbs070310b (right angle). When the tilt angle of the equipment exceeds the set threshold, the tilt switch triggers a signal to the microcontroller U3, which immediately shuts down the thyristor Q3, cutting off the power supply to the heating element and ensuring safe operation.

[0073] Infrared receiver module:

[0074] The infrared receiving module is connected to the microcontroller U3 and is used to receive infrared signals from the remote control. In this embodiment, the remote control can be used to control the functions of the heating lamp, such as heating power, heating time, and power on / off.

[0075] Work process:

[0076] After the device is connected to a 220V AC power supply, the power module converts the AC power to DC power, the buzzer sounds once, the power indicator D1 lights up, and the digital tube LED1 displays "00", indicating that it has entered standby mode. The user sets the treatment time and temperature level via the button input module. The microcontroller U3 adjusts the PWM signal of the heating module according to the input signal, controlling the power output of the heating element. Simultaneously, the display module shows the set parameters in real time. Once treatment begins, the countdown reaches "00", the buzzer sounds three times, and the heating element shuts off. If the device tipes over during operation, the safety protection module immediately cuts off the heating power to prevent safety hazards.

[0077] The medical electromagnetic wave heating lamp control circuit provided in this embodiment has a simple structure and is easy to operate. With multi-level power adjustment and tilt protection functions, it not only meets different treatment needs but also improves the safety of use, and has high practical value.

[0078] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A touch control circuit for a physiotherapy lamp, characterized in that: The system includes a power supply module, a control module, a heating module, a touch input module, a display module, a buzzer alarm module, and a safety protection module. The control module includes a microcontroller U3 and an LED driver chip U1. The microcontroller U3 processes user input, controls the heating lamp power, and monitors the temperature. The LED driver chip U1 controls the digital tube to display the user-set temperature and time information. The heating module includes an optocoupler U4 and a silicon controlled rectifier (SCR) Q3, which receives PWM signals from the control module and adjusts the power output of the heating tube. The touch input module includes touch buttons KEY1, KEY2, and KEY3. KEY1 is configured as a time button, KEY2 as a temperature button, and KEY3 as a start button, connected sequentially to the RB4 / KEY4, RB3 / KEY3, and RB2 / KEY2 pins of the microcontroller U3 for setting the treatment time, temperature level, and device on / off. An external capacitor C11 is connected to the CPA pin of the microcontroller U3. The display module includes a digital tube and status indicator lights, driven by the display LED driver chip U1, for displaying the treatment time and temperature level. The buzzer alarm module is connected to the control module and is used for power-on prompts and treatment completion alarms; the safety protection module is connected to the control module and is used to shut off the heating tube when the machine is tipped over.

2. The touch control circuit for the physiotherapy lamp according to claim 1, characterized in that: The heating module has four temperature settings, which are gradually increased in power: warm, low, medium, and high. Each setting is matched with a status indicator light.

3. The touch control circuit for the physiotherapy lamp according to claim 2, characterized in that: The control module controls the conduction state of the heating module through a thyristor to achieve adjustment of different power levels.

4. The touch control circuit for the physiotherapy lamp according to claim 3, characterized in that: The treatment time is cycled through using a time setting button, and the digital LED1 is used to display the set treatment time in real time.

5. The touch control circuit for the physiotherapy lamp according to claim 4, characterized in that: The tilt protection switch of the safety protection module is mechanical or electronic. When the tilt angle of the equipment exceeds the set threshold, the power supply of the heating module is automatically cut off.

6. The touch control circuit for the physiotherapy lamp according to claim 5, characterized in that: An infrared receiving module is connected to the microcontroller U3.

7. The touch control circuit for the physiotherapy lamp according to claim 1, characterized in that: The power supply module includes: a resistor-capacitor (RC) step-down circuit for stepping down the input AC power, comprising a current-limiting resistor and a step-down capacitor connected in series; a rectifier circuit connected to the RC step-down circuit for converting the AC power into pulsating DC power; a filter circuit connected to the rectifier circuit for smoothing the pulsating DC power; a voltage regulator circuit connected to the filter circuit for outputting a stable DC voltage to power the control circuit; and a zero-crossing detection circuit for detecting the zero-crossing point of the AC power and providing a zero-crossing signal to the thyristor Q3 trigger circuit to ensure that the thyristor is turned on or off at the zero-crossing point.

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