A push button type PCB circuit board

Abstract

The utility model relates to screen printing equipment and transfer printing equipment circuit control technical field, especially be related to a key type PCB circuit board for connecting the circuit control of transfer printing equipment or screen printing equipment, including PCB circuit board, the upper end of PCB circuit board is provided with digital display screen and at least one control button, the lower extreme of PCB circuit board is provided with I / O input interface, I / O output interface, circuit module and program upgrade interface, utilize the signal acquisition module and execution module who set up in combination with photocoupler OC1 and photocoupler OC5 of step-down power supply module, control again through the key control module, can ensure that the newly developed circuit control can realize effective compatibility with the ordinary PCB circuit board circuit control or PLC integrated control machine of old version screen printing equipment or transfer printing equipment, is favorable for the versatility of different screen printing equipment or transfer printing equipment circuit control, control equipment production cost and facilitate program upgrade replacement, reduce the upgrade iteration cost, reduce equipment downtime, guarantee production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of circuit control technology for screen printing equipment and pad printing equipment, and in particular to a button-type PCB circuit board. Background Technology

[0002] In the industrial production sector, pad printing and screen printing equipment, as core equipment in surface printing processes, are widely used for marking, patterning, and functional coating printing on various products such as electronic components, plastic products, and hardware. With the manufacturing industry's increasing demands for production precision, efficiency, and intelligent control, upgrading existing pad printing or screen printing equipment has become an inevitable trend in the industry. Upgrades primarily focus on optimizing control logic, improving operational stability, and expanding functional adaptability to meet higher production standards.

[0003] During equipment upgrades and iterations, the compatibility of the circuit control system is a key consideration. Many currently used older versions of screen printing or pad printing equipment employ specific models of integrated PLC controllers or ordinary PCB circuit boards for control. Over long-term use, these circuits have become stably compatible with the equipment's mechanical structure and operating procedures. To ensure good compatibility between these two systems, ensuring that newly developed circuit control systems are effectively compatible with the ordinary PCB circuit board circuit control or integrated PLC controllers of older screen printing or pad printing equipment has become a crucial issue that urgently needs to be addressed. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A button-type PCB board for connecting circuit control of pad printing equipment or screen printing equipment includes a PCB board. A digital display screen and at least one control button are located at the upper end of the PCB board, and I / O input interfaces, I / O output interfaces, circuit modules, and a program upgrade interface are located at the lower end of the PCB board. The circuit module includes a central processing module, a signal acquisition module, an execution module, a key control module, a step-down power supply module, and a display module. The I / O input interface is electrically connected to the central processing module through the signal acquisition module, the I / O output interface is electrically connected to the central processing module through the execution module, the control buttons are electrically connected to the central processing module through the key control module, the digital display screen is electrically connected to the central processing module through the display module, the program upgrade interface is electrically connected to the central processing module, and the step-down power supply module provides a step-down voltage to the PCB circuit board. The signal acquisition module is equipped with an optocoupler OC1, and the execution module is equipped with an optocoupler OC5. Both optocouplers OC1 and OC5 have an input side for setting up a light-emitting diode and an output side for setting up a phototransistor. The input side of optocoupler OC1 is electrically connected to the I / O input interface, and the output side of optocoupler OC1 is electrically connected to the central processing module. The input side of optocoupler OC5 is electrically connected to the central processing module U3, and the output side of optocoupler OC5 is electrically connected to the I / O output interface.

[0006] Preferably, the signal acquisition module is further provided with a light-emitting diode LED1, which is electrically connected between the optocoupler OC1 and the I / O input interface.

[0007] Preferably, the signal acquisition module is further provided with resistors R3 and R4 and capacitor C2. Resistors R3, R4 and C2 constitute a filter circuit and are electrically connected between optocoupler OC1 and I / O input interface.

[0008] Preferably, the signal acquisition module is further provided with a resistor R1, and the voltage after being stepped down by the step-down power supply module is supplied to the output side of the optocoupler OC1 after being current-limited by the resistor R1.

[0009] Preferably, the execution module is further provided with a transistor Q1, and the output side of the two optocouplers OC5 is turned on to the I / O input interface through the transistor Q1.

[0010] Preferably, the execution module is further provided with a diode D2 connected in parallel in the conduction circuit between the transistor Q1 and the I / O input interface.

[0011] Preferably, the execution module is further provided with a resistor R19, which is used to limit the current on the input side of the optocoupler OC5.

[0012] Preferably, the execution module is further provided with a resistor R20, which acts as a pull-down resistor at the base of diode D2.

[0013] Preferably, the step-down power supply module includes a step-down chip U2, an inductor LF1, a diode D10, capacitors CE2, C3, C5, and C6, resistors R6 and R7, and a fuse F1. The fuse F1 is used for overcurrent protection, the inductor LF1 is used to suppress electromagnetic interference, the step-down chip U2 converts the input +24V voltage to a +5V voltage output, capacitors CE2, C3, C5, and C6 are used for filtering, and resistors R6 and R7 form a voltage divider circuit for feedback voltage regulation.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The I / O input interface is used to connect sensors, and the I / O output interface is used to connect additional execution modules. The use of optocouplers OC1 and OC5 achieves opto-isolation of input and output signals, effectively isolating external electromagnetic interference and voltage fluctuations, preventing signal transmission distortion, improving equipment control accuracy, reducing malfunctions and hardware damage, and enhancing the stability and reliability of equipment operation. The digital display screen intuitively displays equipment operating parameters, and the control buttons allow operators to quickly adjust parameters and troubleshoot faults. The program upgrade interface supports convenient program updates, enabling the circuit board to flexibly adapt to changes in production needs, improving equipment flexibility and maintenance convenience. The step-down power supply module can stably output +5V voltage, providing reliable power support to all modules on the circuit board, and effectively protects the circuit through components such as fuses, inductors, and filter capacitors, further ensuring the stable operation of the circuit board and the entire screen printing equipment.

[0015] Therefore, by using a step-down power supply module, combined with optocouplers OC1 and OC5 to set up a signal acquisition module and an execution module, and then controlling it through a button control module, it is possible to ensure that the newly developed circuit control can be effectively compatible with the ordinary PCB circuit board circuit control or PLC integrated control machine of the old version of screen printing equipment or pad printing equipment. This effectively improves its versatility, controls equipment production costs, facilitates program upgrades and replacements, reduces upgrade and iteration costs, reduces equipment downtime, and ensures production efficiency.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of the present invention from one perspective; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a block diagram of the circuit module of this utility model; Figure 4 This is a circuit diagram of the central processing unit module in this utility model; Figure 5 This is a circuit diagram of the signal acquisition module in this utility model; Figure 6 This is the circuit schematic diagram of the execution module in this utility model; Figure 7 This is the circuit diagram of the button control module in this utility model; Figure 8 This is the circuit diagram of the step-down power supply module in this utility model; Figure 9 This is the circuit diagram of the display module in this utility model.

[0019] The reference numerals and names in the figure are as follows: PCB circuit board 10, digital display screen 11, control buttons 12, I / O input interface 13, I / O output interface 14, program upgrade interface 15, central processing module 20, signal acquisition module 21, execution module 22, button control module 23, step-down power supply module 24, display module 25. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Please see Figure 1-9 In this embodiment of the present invention, a button-type PCB circuit board is used for connecting the circuit control of pad printing equipment or screen printing equipment. It includes a PCB circuit board 10, with a digital display screen 11 and at least one control button 12 disposed at the upper end of the PCB circuit board 10, and an I / O input interface 13, an I / O output interface 14, a circuit module, and a program upgrade interface 15 disposed at the lower end of the PCB circuit board 10; wherein, The circuit module includes a central processing module 20, a signal acquisition module 21, an execution module 22, a button control module 23, a step-down power supply module 24, and a display module 25. The I / O input interface 13 is electrically connected to the central processing module 20 via the signal acquisition module 21. The I / O output interface 14 is electrically connected to the central processing module 20 via the execution module 22. The control button 12 is electrically connected to the central processing module 20 via the button control module 23. The digital display screen 11 is electrically connected to the central processing module 20 via the display module 25. When an operator presses the control button 12, the button control module 23 transmits the button signal to the central processing module 20. After processing, the central processing module 20 controls the digital display screen 11 to display relevant information, such as equipment operating parameters and status, via the display module 25. The program upgrade interface 15 is electrically connected to the central processing module 20. The step-down power supply module 24 provides a step-down voltage to the PCB circuit board 10. This program upgrade interface 15 can be used to connect to external devices to upgrade and update the program of the central processing module 20, enabling the PCB circuit board to adapt to more new functions or optimize control logic.

[0022] The signal acquisition module 21 is equipped with an optocoupler OC1, and the execution module 22 is equipped with an optocoupler OC5. Both optocouplers OC1 and OC5 have an input side for setting a light-emitting diode and an output side for setting a phototransistor. The input side of optocoupler OC1 is electrically connected to the I / O input interface 13, and the output side of optocoupler OC1 is electrically connected to the central processing module 20. The input side of optocoupler OC5 is electrically connected to the central processing module 20U3, and the output side of optocoupler OC5 is electrically connected to the I / O output interface 14.

[0023] In the above technical solution, the I / O input interface 13 is used to connect the sensor, and the I / O output interface 14 is used to connect the additional execution module 22. The use of optocouplers OC1 and OC5 achieves opto-isolation of input and output signals, effectively isolating external electromagnetic interference, voltage fluctuations, etc., preventing signal transmission distortion, improving equipment control accuracy, reducing malfunctions and hardware damage, and enhancing the stability and reliability of equipment operation. The digital display screen 11 can intuitively display the equipment operating parameters, and the control buttons 12 facilitate operators to quickly adjust parameters and troubleshoot faults. The program upgrade interface 15 supports convenient program updates, enabling the circuit board to flexibly adapt to changes in production needs, improving the flexibility of equipment use and the convenience of maintenance. The step-down power supply module 24 can stably output +5V voltage, providing reliable power support for each module of the circuit board, and effectively protects the circuit through components such as fuses, inductors, and filter capacitors, further ensuring the stable operation of the circuit board and the entire screen printing equipment.

[0024] Therefore, by using the step-down power supply module 24, combined with the signal acquisition module 21 and execution module 22 set up by optocoupler OC1 and optocoupler OC5, and then controlling it through the button control module 23, it can achieve effective compatibility with the ordinary PCB circuit board control or PLC integrated control machine of the old version of screen printing equipment or pad printing equipment. This is beneficial to the universality of circuit control of different screen printing equipment or pad printing equipment, controls the production cost of the equipment, facilitates program upgrades and replacements, reduces upgrade and iteration costs, reduces equipment downtime, and ensures production efficiency.

[0025] Please see Figure 5 Based on the above technical solution, it is further proposed that the signal acquisition module 21 is also equipped with a light-emitting diode LED1, which is electrically connected between the optocoupler OC1 and the I / O input interface 13; the signal acquisition module 21 is also equipped with resistors R3 and R4 and capacitor C2, which form a filter circuit and are electrically connected between the optocoupler OC1 and the I / O input interface 13; the signal acquisition module 21 is also equipped with resistor R1, and the voltage after being stepped down by the step-down power supply module 24 is supplied to the output side of the optocoupler OC1 after being current-limited by resistor R1. When an external signal is input through I / O input interface 13, current flows through LED1, causing it to light up. At the same time, the filter circuit consisting of resistors R3 and R4 and capacitor C2 filters the input signal to reduce interference. The LED on the input side of optocoupler OC1 lights up due to the light from LED1 or is directly triggered by the input signal, and the phototransistor on the output side is turned on by the light. The voltage after being stepped down by the buck power supply module 24 is current-limited by resistor R1 and provides a suitable current to the output side of OC1. The signal after being turned on is transmitted to the central processing module 20U3, realizing the isolation and transmission of the input signal.

[0026] Please see Figure 6Based on the above technical solution, it is further proposed that the execution module 22 is also equipped with a transistor Q1, and the output side of the optocoupler OC5 is turned on to the I / O input interface 13 through the transistor Q1; the execution module 22 is also equipped with a diode D2 connected in parallel in the conduction circuit between the transistor Q1 and the I / O input interface 13; the execution module 22 is also equipped with a resistor R19, which is used to limit the current on the input side of the optocoupler OC5; the execution module 22 is also equipped with a resistor R20, which acts as a pull-down resistor on the base of the diode D2. In the above technical solution, the central processing module 20 outputs a control signal to the input side of the optocoupler OC5, causing the input-side light-emitting diode to light up and the output-side phototransistor to conduct; the resistor R19 limits the current on the input side of the optocoupler OC5 to protect the component; after the output side of the optocoupler OC5 is turned on, the transistor Q1 is controlled to conduct through the resistor R20 (the pull-down resistor stabilizes the base potential of the transistor Q1), and the current is output through the I / O output interface 14. Diode D2 is connected in parallel in the conduction circuit between transistor Q1 and I / O output interface 14, serving as freewheeling protection to prevent reverse electromotive force from damaging the components.

[0027] Please see Figure 8 Based on the above technical solution, a step-down power supply module 24 is further proposed, including a step-down chip U2, an inductor LF1, a diode D10, capacitors CE2, C3, C5, and C6, resistors R6 and R7, and a fuse F1. The fuse F1 is used for overcurrent protection, the inductor LF1 is used to suppress electromagnetic interference, the step-down chip U2 converts the input +24V voltage to a +5V voltage output, capacitors CE2, C3, C5, and C6 are used for filtering, and resistors R6 and R7 form a voltage divider circuit for feedback voltage regulation. In the above technical solution, the input +24V voltage is rectified by diode D10 after passing through fuse F1 (overcurrent protection circuit) and inductor LF1 (electromagnetic interference suppression), and filtered by capacitors CE2 and C3. The step-down chip U2 converts the processed voltage into a +5V output, which is further filtered by capacitors C5 and C6. The voltage divider circuit composed of resistors R6 and R7 feeds back the voltage to U2, adjusting the output voltage to stabilize at +5V, thus powering the entire circuit board.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A key PCB circuit board for connecting the circuit control of a pad printing apparatus or a screen printing apparatus, characterized in that, The system includes a PCB circuit board (10), with a digital display screen (11) and at least one control button (12) at the upper end of the PCB circuit board (10), and an I / O input interface (13), an I / O output interface (14), a circuit module, and a program upgrade interface (15) at the lower end of the PCB circuit board (10); wherein, The circuit module includes a central processing module (20), a signal acquisition module (21), an execution module (22), a key control module (23), a step-down power supply module (24), and a display module (25). The I / O input interface (13) is electrically connected to the central processing module (20) through the signal acquisition module (21), the I / O output interface (14) is electrically connected to the central processing module (20) through the execution module (22), the control button (12) is electrically connected to the central processing module (20) through the key control module (23), the digital display screen (11) is electrically connected to the central processing module (20) through the display module (25), the program upgrade interface (15) is electrically connected to the central processing module (20), and the step-down power supply module (24) provides step-down voltage to the PCB circuit board (10). The signal acquisition module (21) is equipped with an optical coupler (OC1), and the execution module (22) is equipped with an optical coupler (OC5). Both the optical coupler (OC1) and the optical coupler (OC5) have an input side for setting up a light-emitting diode and an output side for setting up a phototransistor. The input side of the optical coupler (OC1) is electrically connected to the I / O input interface (13), and the output side of the optical coupler (OC1) is electrically connected to the central processing module (20). The input side of the optical coupler (OC5) is electrically connected to the central processing module (20) (U3), and the output side of the optical coupler (OC5) is electrically connected to the I / O output interface (14).

2. A pushbutton PCB circuit board according to claim 1, characterized in that The signal acquisition module (21) is also equipped with a light-emitting diode (LED1), which is electrically connected between the optocoupler (OC1) and the I / O input interface (13).

3. A pushbutton PCB circuit board according to claim 2, characterized in that The signal acquisition module (21) is also equipped with resistors (R3), resistors (R4) and capacitors (C2). Resistors (R3), resistors (R4) and capacitors (C2) form a filter circuit and are electrically connected between the optocoupler (OC1) and the I / O input interface (13).

4. A pushbutton PCB circuit board according to claim 3, characterized in that The signal acquisition module (21) is also equipped with a resistor (R1). The voltage after step-down by the step-down power supply module (24) is limited by the resistor (R1) and then supplied to the output side of the optocoupler (OC1).

5. A push button PCB circuit board as claimed in claim 1, wherein, The execution module (22) is also equipped with a transistor (Q1), and the output side of the two optocouplers (OC5) is turned on to the I / O input interface (13) through the transistor (Q1).

6. A pushbutton PCB circuit board according to claim 5, characterized in that The execution module (22) is also provided with a diode (D2) connected in parallel in the conduction circuit of the transistor (Q1) and the I / O input interface (13).

7. A pushbutton PCB circuit board according to claim 5, characterized in that The execution module (22) is also provided with a resistor (R19) which is used to limit the current on the input side of the optocoupler (OC5).

8. A pushbutton PCB circuit board according to claim 5, characterized in that The execution module (22) is also equipped with a resistor (R20), which acts as a pull-down resistor at the base of the diode (D2).

9. A push button PCB circuit board according to claim 1, wherein, The step-down power supply module (24) includes a step-down chip (U2), an inductor (LF1), a diode (D10), a capacitor (CE2), a capacitor (C3), a capacitor (C5), a capacitor (C6), a resistor (R6), a resistor (R7), and a fuse (F1). The fuse (F1) is used for overcurrent protection, the inductor (LF1) is used to suppress electromagnetic interference, the step-down chip (U2) converts the input +24V voltage to a +5V voltage output, the capacitors (CE2), (C3), (C5), and (C6) are used for filtering, and the resistors (R6) and (R7) form a voltage divider circuit for feedback voltage regulation.

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