Double-indicating-lamp voltage reduction and supply line
Through the design of the voltage reduction line of the dual indicator light, the fuse current is detected by a microcontroller to ensure the correct power supply of the driving recorder, and the problems of difficulty in connection and low safety in the existing technology are solved, and simplified operation and efficient power supply are achieved.
Patent Information
- Application Number
- CN202422259901.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-14
AI Technical Summary
In the prior art, the correctness of the fuse cannot be directly judged when the driving recorder is connected to the power supply, and it is easy to connect the fuse incorrectly or reversely, resulting in short circuit or circuit board damage, and the connection process is complicated and the safety is low.
A dual indicator light voltage reduction line is designed, and the current of the normal electrical connector and ACC connector is detected by the first indicator light and the second indicator light controlled by the microcontroller respectively to ensure that the two indicator lights are on at the same time indicate the connection is correct, and a power supply circuit is formed to avoid reverse connection damage to the circuit board.
Simplifies the connection process, improves safety, avoids circuit board damage, ensures the correctness and stability of power supply, and is simple and efficient in operation.
Smart Images
Figure CN223066582U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the power supply field of a driving recorder for an automobile, in particular to a dual-indicator voltage-reducing power supply wire. Background Art
[0002] A conventional voltage-reducing wire for powering a driving recorder includes a constant power interface and an ACC interface. When people connect such an ordinary voltage-reducing wire to an automobile battery fuse box, it is impossible to directly determine which fuse in the fuse box is suitable for constant power and which fuse is suitable for ACC. At this time, a multimeter is usually used to measure the voltage for identification, or by consulting an automobile dealer, a repair shop, and referring to the instruction manual of the vehicle battery fuse box to judge and find the corresponding fuse in the fuse box, and then try to connect the constant power interface and the ACC interface respectively. And during the connection attempt, it is necessary to repeatedly start and turn off the automobile many times to verify whether the fuses of the constant power port and the ACC port are correctly connected. Through the above connection method, problems such as the interface being wrongly connected or reversed with the corresponding fuse may occur, resulting in short circuits of the voltage-reducing wire or the circuit board being burned out. At the same time, such a connection method requires multiple tools, requires complicated testing and judgment, is time-consuming, and has low safety. Content of the Utility Model
[0003] The purpose of the utility model is to provide a dual-indicator voltage-reducing power supply wire to solve the above technical problems. The specific technical solutions are as follows:
[0004] A dual-indicator voltage-reducing power supply wire includes: a connection interface for connecting to a driving recorder, a grounding joint for electrically connecting to a metal crossbeam of a vehicle, a constant power joint for electrically connecting to a constant power port fuse in a battery fuse box, an ACC joint for electrically connecting to an ACC port fuse in the battery fuse box, and a circuit board for loading a power supply circuit; a single-chip microcomputer for electric control is electrically installed on the circuit board; the circuit board is provided with a first indicator light and a second indicator light; the first indicator light is electrically connected to the single-chip microcomputer, and both ends of its circuit are electrically connected to the constant power joint and the connection interface respectively; the second indicator light is electrically connected to the single-chip microcomputer, and both ends of its circuit are electrically connected to the ACC joint and the connection interface respectively; the first indicator light is turned on and lit when the single-chip microcomputer detects the flowing current between the constant power joint and the long power supply fuse in the vehicle battery; the second indicator light is turned on and lit when the single-chip microcomputer detects the flowing current between the ACC joint and the fuse that works after the vehicle starts; when the lighting circuits in the first indicator light and the second indicator light are simultaneously conducted, the constant power joint and the ACC joint together with the connection interface form a power supply circuit to power the driving recorder.
[0005] Furthermore, an analog-to-digital converter for detecting the voltage of an automobile battery is also provided on the circuit board; the analog-to-digital converter is electrically connected to the circuit of the single-chip microcomputer and the automobile battery.
[0006] Furthermore, a power-off switch for turning on and off the power supply circuit of the driving recorder is also provided on the circuit board; the power-off switch is electrically connected to the single-chip microcomputer, and its two ends are respectively electrically connected to the car battery and the driving recorder.
[0007] Furthermore, an input fuse for safely controlling the current input from the car battery is also provided on the circuit board.
[0008] Furthermore, input high and low temperature solid capacitors for reducing the influence of voltage fluctuations on the power supply circuit are provided at the connection ends of the input fuse.
[0009] Furthermore, an output fuse for safely controlling the current output to the driving recorder is also provided on the circuit board.
[0010] Furthermore, output high and low temperature solid capacitors for reducing the influence of voltage fluctuations on the power supply circuit are provided at the connection ends of the output fuse.
[0011] Furthermore, a surge protection device for instantaneously absorbing high voltage spikes caused by car starting or lightning to prevent overvoltage damage to the circuit board is also provided on the circuit board.
[0012] Furthermore, an anti-reverse connection circuit module for preventing reverse current flow when the positive and negative poles are connected wrongly to avoid damage to internal components and a backflow protection circuit module for preventing static electricity generated during the use of the driving recorder or current generated when connected to a third-party hardware accessory from flowing back into the circuit board through the ACC connector are also provided on the circuit board; one end of the anti-reverse connection circuit module is electrically connected to the circuit board, and the other end is electrically connected to the ACC connector and the constant power connector; one end of the backflow protection circuit module is electrically connected to the single-chip microcomputer, and the other end is electrically connected to the ACC connector.
[0013] Furthermore, a filter for input filtering to filter the current flowing through the circuit board is also provided on the circuit board.
[0014] Beneficial effects: The dual-indicator voltage-reducing power supply line of this solution sets a first indicator light and a second indicator light, and uses the circuit that simultaneously powers on the first indicator light and the second indicator light as the power supply circuit for starting to power the driving recorder. The connection structure is simple. By the lighting of the first indicator light and the second indicator light, it can be directly judged whether the fuse is correctly connected, which can avoid damage to the circuit board caused by reverse connection of the fuse, has high safety, simple operation and higher connection efficiency. Description of the Drawings
[0015] Figure 1 is a schematic diagram of an embodiment of the dual-indicator voltage-reducing power supply line of the present utility model;
[0016] Figure 2For Figure 1 Schematic diagram of an electrical module on the internal circuit board of the dual indicator power supply voltage reduction wire in
[0017] Dual indicator power supply voltage reduction wire 10, connection interface 11, ground connection 12, constant power connection 13, ACC connection 14, circuit board 15, single-chip microcomputer 16, first indicator 17, second indicator 18, digital-to-analog converter 19, power-off switch 20, input fuse 21, input high and low temperature solid capacitors 22, output fuse 23, output high and low temperature solid capacitors 24, surge protection device 25, backflow protection circuit module 26, filter 27, installation housing 28, reverse connection protection circuit module 29. Specific implementation mode
[0018] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0019] Embodiment 1
[0020] As Figures 1 to 2 shown, a dual indicator power supply voltage reduction wire 10 of this solution includes: a connection interface 11, a ground connection 12, a constant power connection 13, an ACC connection 14, and a circuit board 15. The circuit board 15 is arranged in an installation housing 28. During installation, the connection interface 11 is connected to the power supply interface of the driving recorder, the ground connection 12 is electrically connected to the metal crossbeam of the vehicle, the constant power connection 13 is electrically connected to the constant power port fuse in the battery fuse box, the ACC connection 14 is electrically connected to the ACC port fuse in the battery fuse box, and a power supply circuit is loaded on the circuit board 15. In this way, the current in the car battery can be transmitted to the connection interface 11 through the power supply circuit on the circuit board 15 through the ground connection 12, the constant power connection 13, and the ACC connection 14, so as to realize power supply to the driving recorder.
[0021] Further, a single-chip microcomputer 16 for electric control is electrically installed on the circuit board 15, and a first indicator light 17 and a second indicator light 18 are also provided on the circuit board 15. During installation: electrically connect the first indicator light 17 to the single-chip microcomputer 16, and electrically connect both ends of its circuit (the circuit that lights up when powered on) to the constant power supply connector 13 and the connection interface 11 respectively; then electrically connect the second indicator light 18 to the single-chip microcomputer 16, and electrically connect both ends of its circuit (the circuit that lights up when powered on) to the ACC connector 14 and the connection interface 11 respectively. The single-chip microcomputer 16 can detect the flowing current of the long power supply fuse in the constant power supply connector 13 and the vehicle battery, as well as the flowing current of the fuse that works after the vehicle starts in the ACC connector 14. In this way, the first indicator light 17 lights up when the single-chip microcomputer 16 detects the flowing current of the long power supply fuse in the constant power supply connector 13 and the vehicle battery, and the second indicator light 18 lights up when the single-chip microcomputer 16 detects the flowing current of the fuse that works after the vehicle starts in the ACC connector 14. That is to say, the conduction of the lighting circuits of the first indicator light 17 and the second indicator light 18 is controlled by the single-chip microcomputer 16's detection of the above two-way current. On the basis of the above circuit design, when the lighting circuits of the constant power supply connector 13 and the ACC connector 14 in the first indicator light 17 and the second indicator light 18 are simultaneously conducted, they jointly form a power supply circuit with the connection interface 11 to supply power to the driving recorder.
[0022] The above dual indicator light voltage-reducing power supply line 10 is provided with a first indicator light 17 and a second indicator light 18. By the lighting of the first indicator light 17 or the second indicator light 18, it can be judged that the corresponding fuse connection line is correct, and the circuit where the first indicator light 17 and the second indicator light 18 are simultaneously powered on is used as a part of the power supply circuit for starting to supply power to the driving recorder, which can avoid damage to the circuit board 15 caused by reverse connection of the fuse. The connection structure is simple, the safety is high, the operation is simple, and the connection efficiency is higher.
[0023] In the above solution, it is connected to the vehicle ACC power supply fuse through the ACC connector 14. When the vehicle is ignited and started, the ACC power supply supplies power to ensure that the driving recorder operates with the vehicle start. By connecting the constant power supply connector 13 to the long power supply fuse of the vehicle, it can ensure that the driving recorder can still work continuously after the vehicle is turned off. In this way, the driving recorder can be continuously powered whether the vehicle is turned off or started.
[0024] As a specific implementation manner, a digital-to-analog converter 19 is further provided on the circuit board 15. The digital-to-analog converter 19 is electrically connected to the circuits of the single-chip microcomputer 16 and the vehicle battery, and can detect the voltage of the vehicle battery. The single-chip microcomputer 16 processes the detected data and performs corresponding electrical control. In this way, by setting the battery voltage protection point, the digital-to-analog converter 19 monitors the voltage of the vehicle battery in real time. When the battery has a low voltage, the single-chip microcomputer 16 controls the power supply circuit to disconnect, thereby automatically protecting the battery and preventing the continuous consumption of the battery power.
[0025] Furthermore, a power-off switch 20 is further provided on the circuit board 15. The power-off switch 20 is electrically connected to the single-chip microcomputer 16, and its two ends are respectively electrically connected to the vehicle battery and the driving recorder. When the digital-to-analog converter 19 monitors in real time that the voltage of the vehicle battery is lower than the voltage protection point, the single-chip microcomputer 16 controls the power-off switch 20 to cut off the power supply circuit of the driving recorder. When the digital-to-analog converter 19 monitors in real time that the voltage of the vehicle battery is higher than the voltage protection point, the single-chip microcomputer 16 controls the power-off switch 20 to energize the power supply circuit of the driving recorder, thereby restoring the power supply to the driving recorder.
[0026] As a specific implementation manner, an input fuse 21, an output fuse 23, an input high and low temperature solid capacitor 22, and an output high and low temperature solid capacitor 24 are further provided on the circuit board 15. The input fuse 21 is used for the safety control of the current input from the vehicle battery. The input high and low temperature solid capacitor 22 is arranged at the connection end of the input fuse 21 to reduce the influence of voltage fluctuation on the power supply circuit.
[0027] The output fuse 23 is used for the safety control of the current output to the driving recorder. The output high and low temperature solid capacitor 24 is arranged at the connection end of the output fuse 23 to reduce the influence of voltage fluctuation on the power supply circuit. In this way, by setting the input fuse 21, the output fuse 23, the input high and low temperature solid capacitor 22, and the output high and low temperature solid capacitor 24, the dual-indicator power supply step-down wire can work in environments of -20°C and 60°C, adapt to various complex vehicle electrical environments, and prevent equipment damage caused by voltage fluctuation.
[0028] As a specific implementation manner, a surge protection device 25 is further provided on the circuit board 15. Through the surge protection device 25, high-voltage spikes caused by vehicle startup or lightning can be absorbed instantaneously to prevent overvoltage damage to the circuit board 15. Here, the surge protection device 25 can use a TVS (Transient Voltage Suppressor) diode or an MOV (Metal Oxide Varistor). When an instantaneous high voltage is detected, the surge protection device 25 immediately conducts, absorbs and discharges the excess voltage, and prevents overvoltage damage to the main circuit. Voltage spikes during vehicle startup, lightning interference, electrostatic discharge (ESD), etc. can all be used as triggering conditions for the surge protection device 25.
[0029] As a specific implementation, a backflow protection circuit module 26 and an anti-reverse connection circuit module 29 are also provided on the circuit board 15. Among them:
[0030] One end of the anti-reverse connection circuit module 29 is electrically connected to the circuit board 15, and the other end is electrically connected to the ACC connector 14 and the constant power connector 13. In this way, when the positive and negative poles are connected wrongly, it can prevent the current from flowing reversely, thereby avoiding damaging the internal components. The anti-reverse connection circuit module 29 of this solution can adopt a Schottky diode or a P-MOSFET anti-reverse connection circuit. That is to say, a Schottky diode or a P-MOSFET anti-reverse connection circuit is added at the power input end to ensure that even if the user connects the positive and negative poles wrongly, the current will not flow reversely, avoiding damaging the internal components.
[0031] One end of the backflow protection circuit module 26 is electrically connected to the single-chip microcomputer 16, and the other end is electrically connected to the ACC connector 14. The backflow protection circuit module 26 of this solution can adopt a diode or a dedicated backflow protection IC to isolate static electricity or reverse current. That is to say, through the backflow protection circuit module 26, when static electricity is generated during the use of the dash cam or when it is connected to a third-party hardware accessory, it can prevent the current from flowing back into the step-down line main board through the ACC connector 14 and damaging the single-chip microcomputer 16.
[0032] As a specific implementation, a filter 27 is also provided on the circuit board 15. Through the filter 27, input filtering can be performed to filter the current flowing through the circuit board 15, thereby preventing power noise from being transmitted to devices such as the vehicle radio and causing noise.
[0033] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
Claims
1. A dual-indicator voltage-reducing power supply line, characterized in that, Including: A connection interface for connecting a driving recorder, a grounding joint for electrically connecting to a metal crossbeam of a vehicle, a constant power supply joint for electrically connecting to a constant power supply fuse in a battery fuse box, an ACC joint for electrically connecting to an ACC fuse in the battery fuse box, and a circuit board for loading a power supply circuit; An electronic control single-chip microcomputer is electrically installed on the circuit board; The circuit board is provided with a first indicator light and a second indicator light; The first indicator light is electrically connected to the single-chip microcomputer, and its two ends of the circuit are respectively electrically connected to the constant power supply joint and the connection interface; The second indicator light is electrically connected to the single-chip microcomputer, and its two ends of the circuit are respectively electrically connected to the ACC joint and the connection interface; The first indicator light is turned on and lit when the single-chip microcomputer detects the flowing current of the constant power supply joint and the long power supply fuse in the vehicle battery; The second indicator light is turned on and lit when the single-chip microcomputer detects the flowing current of the ACC joint and the fuse that works after the vehicle is started; When the lighting circuits in the first indicator light and the second indicator light are simultaneously turned on, the constant power supply joint and the ACC joint together with the connection interface form a power supply circuit to supply power to the driving recorder.
2. The dual-indicator light voltage-reducing power supply line according to claim 1, characterized in that A digital-to-analog converter for detecting the voltage of an automotive battery is further provided on the circuit board; The digital-to-analog converter is electrically connected to the circuit of the single-chip microcomputer and the automotive battery.
3. The dual-indicator light voltage-reducing power supply line according to claim 2, characterized in that A power-off switch for turning on and off the power supply circuit of the driving recorder is further provided on the circuit board; The power-off switch is electrically connected to the single-chip microcomputer, and its two ends are respectively electrically connected to the automotive battery and the driving recorder.
4. The dual-indicator light voltage-reducing power supply line according to claim 1, characterized in that An input fuse for safely controlling the current input from the automotive battery is further provided on the circuit board.
5. The dual-indicator light voltage-reducing power supply line according to claim 4, characterized in that An input high and low temperature solid-state capacitor for reducing the influence of voltage fluctuation on the power supply circuit is provided at the connection end of the input fuse.
6. The dual-indicator light voltage-reducing power supply line according to claim 1, characterized in that An output fuse for safely controlling the current output to the driving recorder is further provided on the circuit board.
7. The dual-indicator light voltage-reducing power supply line according to claim 6, characterized in that An output high and low temperature solid-state capacitor for reducing the influence of voltage fluctuation on the power supply circuit is provided at the connection end of the output fuse.
8. The dual-indicator light voltage-reducing power supply line according to claim 1, characterized in that A surge protection device for instantaneously absorbing high voltage spikes caused by vehicle start-up or lightning to prevent overvoltage damage to the circuit board is further provided on the circuit board.
9. The dual-indicator light voltage-reducing power supply line according to claim 1, characterized in that The circuit board is also provided with an anti-reverse connection circuit module for preventing the reverse flow of current when the positive and negative poles are connected wrongly, thereby avoiding damage to internal components, and a backflow protection circuit module for preventing static electricity generated during the use of the driving recorder or current generated when connected to a third-party hardware accessory from flowing back into the circuit board through the ACC connector; One end of the anti-reverse connection circuit module is electrically connected to the circuit board, and the other end is electrically connected to the ACC connector and the constant power connector; One end of the backflow protection circuit module is electrically connected to the single-chip microcomputer, and the other end is electrically connected to the ACC connector.
10. The dual-indicator voltage-reducing power supply line according to claim 1, wherein The circuit board is also provided with a filter for input filtering to filter the current flowing through the circuit board.