Circuit board capable of automatically adjusting port power supply time and adjusting device thereof

Abstract

The utility model discloses a circuit board capable of automatically adjusting port power supply time and an adjusting device thereof. The circuit board comprises a control module; the input end of the time delay module is electrically connected with the output end of the control module; the input end of the USB module is connected with the output end of the delay module; the input end of the interface module is electrically connected with the output end of the USB module, the output end of the interface module is electrically connected with the input end of the control module, and the interface module is used for detecting access equipment signals of the USB module. On-off of the switch of the time delay module is adjusted through the control module, a resistor in the time delay module is adjusted so as to cause change of reference voltage of the time delay module, the time delay module adjusts charging effort by adjusting the reference voltage, and it is guaranteed that USB starting equipment can be successfully loaded.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to a circuit board capable of automatically adjusting the power supply time of a port and an adjusting device thereof. Background Art

[0002] In the prior art, the number of industrial-grade embedded devices with USB ports is limited, the power consumption of different peripheral USB devices is different, the order of driver loading is inconsistent, and there is a certain time difference. Multiple devices are connected to the USB HUB before powering on. Due to the sudden power consumption of each device at the moment of loading, loading failure may easily occur. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a circuit board and an adjusting device for automatically adjusting port time, which can automatically adjust the port power-on time.

[0004] On the one hand, according to an embodiment of the present invention, a circuit board for automatically adjusting port power supply time includes:

[0005] Control module;

[0006] A delay module, wherein an input end of the delay module is electrically connected to an output end of the control module;

[0007] A USB module, wherein an input end of the USB module is connected to an output end of the delay module;

[0008] An interface module, wherein the input end of the interface module is electrically connected to the output end of the USB module, the output end of the interface module is electrically connected to the input end of the control module, and the interface module is used to detect an access device signal of the USB module.

[0009] According to some embodiments of the utility model, the control module is provided with a first chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode, a first capacitor and an adjustment button, one end of the first resistor is connected to the fourth pin of the first chip, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the third pin of the first chip, one end of the third resistor is connected to the seventh pin of the first chip, the other end of the third resistor is connected to the anode of the first diode, the cathode of the first diode, the first end of the adjustment button, and the second end of the adjustment button are all connected to one end of the first capacitor, the other end of the first capacitor is grounded, the third end of the adjustment button and the fourth end of the adjustment button are both grounded, one end of the fourth resistor is connected to the seventh pin of the first chip, the other end of the fourth resistor is connected to the anode of the second diode, and the cathode of the second diode is connected to the twenty-fourth pin of the first chip, wherein the second diode is a light emitting diode.

[0010] According to some embodiments of the utility model, the delay module is provided with a second chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a second capacitor, a third capacitor, a third diode, a first triode and a first MOS tube, the cathode of the third diode and one end of the sixth resistor are both connected to the second pin of the second chip, the anode of the third diode and the other end of the sixth resistor are both grounded, one end of the second capacitor and one end of the seventh resistor are both connected to the eighth pin of the second chip, the other end of the second capacitor is connected to the sixth pin of the second chip, the other end of the seventh resistor is connected to the seventh pin of the second chip, one end of the third capacitor is grounded, and the The other end of the third capacitor is connected to the fifth pin of the second chip, one end of the eighth resistor is connected to the third pin of the second chip and one end of the ninth resistor, the other end of the eighth resistor is grounded, the other end of the ninth resistor is connected to the base of the first transistor, the emitter of the first transistor is grounded, the collector of the first transistor is connected to one end of the tenth resistor, the other end of the tenth resistor and one end of the eleventh resistor are both connected to the gate of the first MOS tube, the other end of the eleventh resistor, the drain of the first MOS tube and one end of the twelfth resistor are all connected to the sixth pin of the first chip, and the source of the first MOS tube and the other end of the twelfth resistor are both connected to the interface module.

[0011] According to some embodiments of the utility model, the delay module is further provided with a switch on-off unit, and the switch on-off unit is provided with a third chip, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor and a twenty-third resistor, one end of the twelfth resistor is connected to the sixth pin of the third chip, the other end of the twelfth resistor is grounded, the eleventh pin of the third chip is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor is connected to the eighteenth pin of the third chip, the tenth pin of the third chip is connected to one end of the fourteenth resistor, and the other end of the fourteenth resistor is connected to the first pin of the third chip. The seventeenth pins of the three chips are connected, the ninth pin of the third chip is connected to one end of the fifteenth resistor, the other end of the fifteenth resistor is connected to the sixteenth pin of the third chip, the thirteenth pin of the third chip is grounded through the sixteenth resistor, the fourteenth pin of the third chip is grounded through the seventeenth resistor, the fifteenth pin of the third chip is grounded through the eighteenth resistor, the twelfth pin of the third chip is grounded through the nineteenth resistor, the first pin of the third chip is grounded through the twentieth resistor, the fifth pin of the third chip is grounded through the twenty-first resistor, the second pin of the third chip is grounded through the twenty-second resistor, and the fourth pin of the third chip is grounded through the twenty-third resistor.

[0012] According to some embodiments of the utility model, the USB module is provided with a fourth chip, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor, one end of the fourth capacitor is connected to the second pin of the fourth chip, the other end of the fourth capacitor and one end of the fifth capacitor are both grounded, the other end of the fifth capacitor is connected to the third pin of the fourth chip, one end of the twenty-fourth resistor is grounded, the other end of the twenty-fourth resistor is connected to the fourteenth pin of the fourth chip, and one end of the twenty-fifth resistor is connected to the twenty-second pin of the fourth chip The other end of the twenty-fifth resistor, the twenty-first pin of the fourth chip and one end of the twenty-sixth resistor are all connected to one end of the twenty-seventh resistor, the other end of the twenty-sixth resistor is connected to the seventeenth pin of the fourth chip, one end of the twenty-seventh resistor is respectively connected to the twenty-eighth resistor, the twenty-ninth resistor, the thirtieth resistor and one end of the sixth capacitor, the other end of the twenty-eighth resistor is connected to the twenty-sixth pin of the fourth chip, the other end of the twenty-ninth resistor is connected to the nineteenth pin of the fourth chip, the other end of the thirtieth resistor is connected to the eighteenth pin of the fourth chip, and the other end of the sixth capacitor is grounded.

[0013] According to some embodiments of the utility model, the USB module is also provided with a first USB unit and multiple second USB units, the first USB unit is provided with a first filter, a first interface power socket, a first electrostatic protection element and a second electrostatic protection element, one end of the first filter is connected to the twentieth pin of the fourth chip, the other end of the first filter is connected to the first pin of the first interface power socket, one end of the first electrostatic protection element is grounded, the other end of the first electrostatic protection element is connected to the second pin of the first interface power socket, one end of the second electrostatic protection element is grounded, and the other end of the second electrostatic protection element is connected to the third pin of the first interface power socket.

[0014] According to some embodiments of the utility model, multiple second USB units are each provided with a second filter, a second interface power socket, a third electrostatic protection element and a fourth electrostatic protection element, one end of the second filter is connected to the twentieth pin of the fourth chip, the other end of the second filter is connected to the first pin of the second interface power socket, one end of the third electrostatic protection element is grounded, the other end of the third electrostatic protection element is connected to the second pin of the second interface power socket, one end of the fourth electrostatic protection element is grounded, and the other end of the fourth electrostatic protection element is connected to the third pin of the second interface power socket.

[0015] The embodiment of the utility model provides a regulating device for automatically regulating the power supply time of a port, so as to realize the circuit board for automatically regulating the power supply time of a port in the embodiment of the first aspect.

[0016] The circuit board for automatically adjusting the port power supply time according to the embodiment of the utility model has at least the following features:

[0017] Beneficial effects:

[0018] A control module; a delay module, the input end of the delay module is electrically connected to the output end of the control module; a USB module, the input end of the USB module is connected to the output end of the delay module; an interface module, the input end of the interface module is electrically connected to the output end of the USB module, the output end of the interface module is electrically connected to the input end of the control module, and the interface module is used to detect the access device signal of the USB module. The control module adjusts the switch on and off of the delay module, adjusts the resistance in the delay module, and thus causes the change of the reference voltage of the delay module. The delay module adjusts the charging force by adjusting the reference voltage to ensure that the USB startup device can be successfully loaded.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the circuit board principle for automatically adjusting the port power supply time according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the circuit principle of the control module of an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the circuit principle of the delay module of an embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the circuit principle of the switch on / off unit of an embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the circuit principle of the USB module of the embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the circuit principle of the first USB unit of an embodiment of the utility model;

[0027] Figure 7It is a schematic diagram of the circuit principle of the second USB unit according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] Control module 100; delay module 200; switch on / off unit 210; USB module 300; interface module 400; first USB unit 310; second USB unit 320; first chip U1; second chip U2; third chip U3; fourth chip U4; first resistor R1; second resistor R2; third resistor R3; fourth resistor R4; sixth resistor R6; seventh resistor R7; eighth resistor R8; ninth resistor R9; tenth resistor R10; eleventh resistor R11; twelfth resistor R12; thirteenth resistor R13; fourteenth resistor R14; fifteenth resistor R15; sixteenth resistor R16; seventeenth resistor R17; eighteenth resistor R18; nineteenth resistor R19; twentieth resistor R20; twenty-first resistor R21; twenty-second resistor R22 Resistor R22; twenty-third resistor R23; twenty-fourth resistor R24; twenty-fifth resistor R25; twenty-sixth resistor R26; twenty-seventh resistor R27; twenty-eighth resistor R28; twenty-ninth resistor R29; thirtieth resistor R30; first capacitor C1; second capacitor C2; third capacitor C3; fourth capacitor C4; fifth capacitor C5; sixth capacitor C6; first diode D1; second diode D2; third diode D3; first triode Q1; first MOSFET tube Q2; first filter L1; second filter L2; first electrostatic protection element ESD1; second electrostatic protection element ESD2; third electrostatic protection element ESD3; fourth electrostatic protection element ESD4; first interface power socket J1; second interface power socket J2. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Control module 100; delay module 200, the input end of delay module 200 is electrically connected to the output end of control module 100; USB module 300, the input end of USB module 300 is connected to the output end of delay module 200; interface module 400, the input end of interface module 400 is electrically connected to the output end of USB module 300, the output end of interface module 400 is electrically connected to the input end of control module 100, and interface module 400 is used to detect the access device signal of USB module 300. It should be noted that when interface module 400 cannot detect the device connected to USB module 300, control module 100 adjusts the digital switch in delay module 200, adjusts the resistance of delay module 200 by adjusting the digital switch, and then adjusts the reference voltage inside delay module 200 to switch the power supply of USB port. By using the USB module 300, the order of driver loading for different types of external devices can be adjusted, thereby improving the versatility and flexibility of the circuit board that automatically adjusts the port power supply time. In addition, the delay module 200 can avoid the impact of short-term fluctuations in signals and voltages when external devices are connected on the circuit board, effectively avoiding loading failures.

[0034] The control module 100 is provided with a first chip U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, a first capacitor C1 and an adjustment button, one end of the first resistor R1 is connected to the fourth pin of the first chip U1, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the third pin of the first chip U1, one end of the third resistor R3 is connected to the seventh pin of the first chip U1, the other end of the third resistor R3 is connected to the anode of the first diode D1, the cathode of the first diode D1, the first end of the adjustment button, and the second end of the adjustment button are all connected to one end of the first capacitor C1, the other end of the first capacitor C1 is grounded, the third end of the adjustment button and the fourth end of the adjustment button are both grounded, one end of the fourth resistor R4 is connected to the seventh pin of the first chip U1, the other end of the fourth resistor R4 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the twenty-fourth pin of the first chip U1, wherein the second diode D2 is a light emitting diode. It should be noted that the first resistor R1 and the second resistor R2 are respectively connected to the third pin and the fourth pin of the first chip U1, so that the first resistor R1 and the second resistor R2 form a voltage divider, thereby changing the voltage difference in the first chip U1. The seventh pin in the first chip U1 is a power supply pin, and the first diode D1 and the second diode D2 are respectively connected through the seventh pin. The first chip U1 turns on and off the first diode D1 and the second diode D2 by adjusting the button. The third and fourth ends of the adjustment button are grounded to ensure the normal operation of the adjustment button and provide a stable reference potential for the adjustment button.

[0035] The delay module 200 is provided with a second chip U2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a second capacitor C2, a third capacitor C3, a third diode D3, a fourth transistor and a first MOS tube, the cathode of the third diode D3 and one end of the sixth resistor R6 are both connected to the second pin of the second chip U2, the anode of the third diode D3 and the other end of the sixth resistor R6 are both grounded, one end of the second capacitor C2 and one end of the seventh resistor R7 are both connected to the eighth pin of the second chip U2, the other end of the second capacitor C2 is connected to the sixth pin of the second chip U2, the other end of the seventh resistor R7 is connected to the seventh pin of the second chip U2, and the third capacitor C3 is connected to the sixth pin of the second chip U2. One end of the third capacitor C3 is connected to the fifth pin of the second chip U2, one end of the eighth resistor R8 is connected to the third pin of the second chip U2 and one end of the ninth resistor R9, the other end of the eighth resistor R8 is grounded, the other end of the ninth resistor R9 is connected to the base of the first transistor, the emitter of the first transistor is grounded, the collector of the first transistor is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 and one end of the eleventh resistor R11 are both connected to the gate of the first MOS tube, the other end of the eleventh resistor R11, the drain of the first MOS tube and one end of the twelfth resistor R12 are all connected to the sixth pin of the first chip U1, and the source of the first MOS tube and the other end of the twelfth resistor R12 are both connected to the interface module 400. It should be noted that the sixth resistor R6 and the third diode D3 are used to form reverse protection for the second chip U2 to prevent the reverse voltage from damaging the second chip U2. The second capacitor C2 and the seventh resistor R7 provide a capacitor filtering function for the second chip U2, so that the second chip U2 obtains a stable input signal and reduces interference or noise. The third capacitor C3 is used for grounding and signal coupling to ensure that the reference potential of the second chip U2 is stable. The eighth resistor R8, the ninth resistor R9 and the first transistor are used to form a transistor amplifier circuit, and the gain of the amplifier circuit is adjusted by adjusting the base current. In addition, the flexibility and controllability of the delay module 200 are improved by setting the first MOS tube.

[0036] The delay module 200 is also provided with a switch on-off unit 210, and the switch on-off unit 210 is provided with a third chip U3, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22 and a twenty-third resistor R23, one end of the twelfth resistor R12 is connected to the third chip U3, and the other end of the twelfth resistor R12 is grounded, the eleventh pin of the third chip U3 is connected to one end of the thirteenth resistor R13, and the other end of the thirteenth resistor R13 is connected to the eighteenth pin of the third chip U3, the tenth pin of the third chip U3 is connected to one end of the fourteenth resistor R14, and the fourteenth resistor R The other end of 14 is connected to the seventeenth pin of the third chip U3, the ninth pin of the third chip U3 is connected to one end of the fifteenth resistor R15, the other end of the fifteenth resistor R15 is connected to the sixteenth pin of the third chip U3, the thirteenth pin of the third chip U3 is grounded through the sixteenth resistor R16, the fourteenth pin of the third chip U3 is grounded through the seventeenth resistor R17, the fifteenth pin of the third chip U3 is grounded through the eighteenth resistor R18, the twelfth pin of the third chip U3 is grounded through the nineteenth resistor R19, the first pin of the third chip U3 is grounded through the twentieth resistor R20, the fifth pin of the third chip U3 is grounded through the twenty-first resistor R21, the second pin of the third chip U3 is grounded through the twenty-second resistor R22, and the fourth pin of the third chip U3 is grounded through the twenty-third resistor R23. It should be noted that by adjusting the pin connection and ground connection status of the third chip U3, by adjusting the on-off status of the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14, the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18, the nineteenth resistor R19, the twentieth resistor R20, the twenty-first resistor R21, the twenty-second resistor R22 and the twenty-third resistor R23, the reference voltage of the delay module 200 is adjusted, and the third chip U3 is protected by grounding through multiple resistors to prevent overcurrent or other electrical problems from damaging the third chip U3.

[0037] The USB module 300 is provided with a fourth chip U4, a twenty-fourth resistor R24, a twentieth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6, one end of the fourth capacitor C4 is connected to the second pin of the fourth chip U4, the other end of the fourth capacitor C4 and one end of the fifth capacitor C5 are both grounded, the other end of the fifth capacitor C5 is connected to the third pin of the fourth chip U4, one end of the twenty-fourth resistor R24 ​​is grounded, the other end of the twenty-fourth resistor R24 ​​is connected to the fourteenth pin of the fourth chip U4, and one end of the twenty-fifth resistor R25 is connected to the twenty-second pin of the fourth chip U4. The other end of the 25th resistor R25, the 21st pin of the fourth chip U4 and one end of the 26th resistor R26 are all connected to one end of the 27th resistor R27, the other end of the 26th resistor R26 is connected to the 17th pin of the fourth chip U4, one end of the 27th resistor R27 is respectively connected to the 28th resistor R28, the 29th resistor R29, the 30th resistor R30 and one end of the sixth capacitor C6, the other end of the 28th resistor R28 is connected to the 26th pin of the fourth chip U4, the other end of the 29th resistor R29 is connected to the 19th pin of the fourth chip U4, the other end of the 30th resistor R30 is connected to the 18th pin of the fourth chip U4, and the other end of the sixth capacitor C6 is grounded. It should be noted that the fourth capacitor C4 and the fifth capacitor C5 form a capacitive coupling network to filter the signal of the fourth chip U4, and the various interfaces of the USB module 300 are turned on or off according to the charging time of the reference voltage of the delay circuit through the fourth chip U4 and the peripheral circuit of the fourth chip U4, so that the interface module 400, the delay module 200 and the control module 100 form a complete closed loop, thereby reducing the occurrence of failure to load the USB device driver.

[0038] The USB module 300 is also provided with a first USB unit 310 and multiple second USB units 320. The first USB unit 310 is provided with a first filter L1, a first interface power socket J1, a first electrostatic protection element ESD1 and a second electrostatic protection element ESD2. One end of the first filter L1 is connected to the twentieth pin of the fourth chip U4, and the other end of the first filter L1 is connected to the first pin of the first interface power socket J1. One end of the first electrostatic protection element ESD1 is grounded, and the other end of the first electrostatic protection element ESD1 is connected to the second pin of the first interface power socket J1. One end of the second electrostatic protection element ESD2 is grounded, and the other end of the second electrostatic protection element ESD2 is connected to the third pin of the first interface power socket J1. It should be noted that the first USB unit 310 is the USB interface of the control module 100. The high-frequency noise and interference signals input from the control module 100 to the interface module 400 are filtered out through the first filter L1, thereby ensuring the stability of the signal quality of the interface module 400 and improving the reliability of signal transmission. The first interface power socket J1 is used to provide the power supply required by the interface module 400, and can also distribute the power signal to other interface units. The first electrostatic protection element and the second electrostatic protection element ESD2 are used to prevent the electrostatic interference caused by the external components of the USB interface of the interface module 400 and the damage to the interface module 400 caused by overvoltage bad signals, thereby further improving the anti-interference and reliability of the interface module 400.

[0039] Multiple second USB units 320 are each provided with a second filter L2, a second interface power socket J2, a third electrostatic protection element and a fourth electrostatic protection element. One end of the second filter L2 is connected to the twentieth pin of the fourth chip U4, and the other end of the second filter L2 is connected to the first pin of the second interface power socket J2. One end of the third electrostatic protection element is grounded, and the other end of the third electrostatic protection element is connected to the second pin of the second interface power socket J2. One end of the fourth electrostatic protection element is grounded, and the other end of the fourth electrostatic protection element is connected to the third pin of the second interface power socket J2. It should be noted that the second USB unit 320 is an external USB interface of the interface module 400, which is used to connect an external device to the USB module 300. The second filter L2 filters out high-frequency noise and interference signals in the input signal of the external device to ensure the signal quality of the external device connected to the USB module 300. At the same time, the second filter L2 can effectively isolate the current loop between the external device and the USB module 300 to avoid signal interference between the external device and the internal chip. The third electrostatic protection element ESD3 and the fourth electrostatic protection element ESD4 are used to prevent electrostatic interference and overvoltage and other adverse signals of external devices from damaging the USB module 300 and other devices, further improving the anti-interference ability and reliability of the USB module 300.

[0040] In addition, an embodiment of the present application further provides a circuit board adjustment device for automatically adjusting the port power supply time, and the PCB board electrical performance detection device includes the circuit board for automatically adjusting the port power supply time described in any of the above embodiments.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "further embodiments", "some specific embodiments" or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A circuit board for automatically adjusting port power supply time, characterized in that: include: Control module; A delay module, wherein an input end of the delay module is electrically connected to an output end of the control module; A USB module, wherein an input end of the USB module is connected to an output end of the delay module; An interface module, wherein the input end of the interface module is electrically connected to the output end of the USB module, the output end of the interface module is electrically connected to the input end of the control module, and the interface module is used to detect an access device signal of the USB module.

2. The circuit board for automatically adjusting port power supply time according to claim 1, characterized in that: The control module is provided with a first chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode, a first capacitor and an adjustment button, one end of the first resistor is connected to the fourth pin of the first chip, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the third pin of the first chip, one end of the third resistor is connected to the seventh pin of the first chip, the other end of the third resistor is connected to the anode of the first diode, the cathode of the first diode, the first end of the adjustment button, and the second end of the adjustment button are all connected to one end of the first capacitor, the other end of the first capacitor is grounded, the third end of the adjustment button and the fourth end of the adjustment button are both grounded, one end of the fourth resistor is connected to the seventh pin of the first chip, the other end of the fourth resistor is connected to the anode of the second diode, and the cathode of the second diode is connected to the twenty-fourth pin of the first chip, wherein the second diode is a light emitting diode.

3. The circuit board for automatically adjusting port power supply time according to claim 1, characterized in that: The delay module is provided with a second chip, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a second capacitor, a third capacitor, a third diode, a first triode and a first MOS tube, the cathode of the third diode and one end of the sixth resistor are both connected to the second pin of the second chip, the anode of the third diode and the other end of the sixth resistor are both grounded, one end of the second capacitor and one end of the seventh resistor are both connected to the eighth pin of the second chip, the other end of the second capacitor is connected to the sixth pin of the second chip, the other end of the seventh resistor is connected to the seventh pin of the second chip, one end of the third capacitor is grounded, and the other end of the third capacitor is grounded. An end of the first resistor is connected to the fifth pin of the second chip, one end of the eighth resistor is connected to the third pin of the second chip and one end of the ninth resistor, the other end of the eighth resistor is grounded, the other end of the ninth resistor is connected to the base of the first transistor, the emitter of the first transistor is grounded, the collector of the first transistor is connected to one end of the tenth resistor, the other end of the tenth resistor and one end of the eleventh resistor are both connected to the gate of the first MOS tube, the other end of the eleventh resistor, the drain of the first MOS tube and one end of the twelfth resistor are all connected to the sixth pin of the first chip, and the source of the first MOS tube and the other end of the twelfth resistor are both connected to the interface module.

4. The circuit board for automatically adjusting port power supply time according to claim 3, characterized in that: The delay module is also provided with a switch on-off unit, and the switch on-off unit is provided with a third chip, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor and a twenty-third resistor, one end of the twelfth resistor is connected to the sixth pin of the third chip, the other end of the twelfth resistor is grounded, the eleventh pin of the third chip is connected to one end of the thirteenth resistor, the other end of the thirteenth resistor is connected to the eighteenth pin of the third chip, the tenth pin of the third chip is connected to one end of the fourteenth resistor, and the other end of the fourteenth resistor is connected to the seventeenth pin of the third chip. The pins of the third chip are connected, the ninth pin of the third chip is connected to one end of the fifteenth resistor, the other end of the fifteenth resistor is connected to the sixteenth pin of the third chip, the thirteenth pin of the third chip is grounded through the sixteenth resistor, the fourteenth pin of the third chip is grounded through the seventeenth resistor, the fifteenth pin of the third chip is grounded through the eighteenth resistor, the twelfth pin of the third chip is grounded through the nineteenth resistor, the first pin of the third chip is grounded through the twentieth resistor, the fifth pin of the third chip is grounded through the twenty-first resistor, the second pin of the third chip is grounded through the twenty-second resistor, and the fourth pin of the third chip is grounded through the twenty-third resistor.

5. The circuit board for automatically adjusting port power supply time according to claim 1, characterized in that: The USB module is provided with a fourth chip, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a fourth capacitor, a fifth capacitor and a sixth capacitor, one end of the fourth capacitor is connected to the second pin of the fourth chip, the other end of the fourth capacitor and one end of the fifth capacitor are both grounded, the other end of the fifth capacitor is connected to the third pin of the fourth chip, one end of the twenty-fourth resistor is grounded, the other end of the twenty-fourth resistor is connected to the fourteenth pin of the fourth chip, one end of the twenty-fifth resistor is connected to the twenty-second pin of the fourth chip, and the twenty- The other end of the fifth resistor, the twenty-first pin of the fourth chip and one end of the twenty-sixth resistor are all connected to one end of the twenty-seventh resistor, the other end of the twenty-sixth resistor is connected to the seventeenth pin of the fourth chip, one end of the twenty-seventh resistor is respectively connected to the twenty-eighth resistor, the twenty-ninth resistor, the thirtieth resistor and one end of the sixth capacitor, the other end of the twenty-eighth resistor is connected to the twenty-sixth pin of the fourth chip, the other end of the twenty-ninth resistor is connected to the nineteenth pin of the fourth chip, the other end of the thirtieth resistor is connected to the eighteenth pin of the fourth chip, and the other end of the sixth capacitor is grounded.

6. The circuit board for automatically adjusting port power supply time according to claim 5, characterized in that: The USB module is also provided with a first USB unit and multiple second USB units, the first USB unit is provided with a first filter, a first interface power socket, a first electrostatic protection element and a second electrostatic protection element, one end of the first filter is connected to the twentieth pin of the fourth chip, the other end of the first filter is connected to the first pin of the first interface power socket, one end of the first electrostatic protection element is grounded, the other end of the first electrostatic protection element is connected to the second pin of the first interface power socket, one end of the second electrostatic protection element is grounded, and the other end of the second electrostatic protection element is connected to the third pin of the first interface power socket.

7. The circuit board for automatically adjusting port power supply time according to claim 6, characterized in that: Multiple second USB units are each provided with a second filter, a second interface power socket, a third electrostatic protection element and a fourth electrostatic protection element, one end of the second filter is connected to the twentieth pin of the fourth chip, the other end of the second filter is connected to the first pin of the second interface power socket, one end of the third electrostatic protection element is grounded, the other end of the third electrostatic protection element is connected to the second pin of the second interface power socket, one end of the fourth electrostatic protection element is grounded, and the other end of the fourth electrostatic protection element is connected to the third pin of the second interface power socket.

8. A device for automatically adjusting the port power supply time, characterized in that: include: A circuit board for automatically adjusting port power supply time as claimed in any one of claims 1 to 7.

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