Rear fog lamp control circuit, device and automobile based on discrete components

Abstract

The present invention discloses a rear fog lamp control circuit, device and automobile based on discrete components, relating to the technical field of vehicle lamp control. The rear fog lamp control circuit includes a rear fog lamp switch and a first relay. The rear fog lamp switch is connected to the front fog lamp, low beam lamp and high beam lamp. The first relay is connected to the rear fog lamp switch, a power supply and the rear fog lamp. When any one of the front fog lamp, low beam lamp and high beam lamp is turned on and the rear fog lamp switch is turned on, the first relay is closed and the rear fog lamp is turned on; when the front fog lamp, low beam lamp and high beam lamp are all turned off or the rear fog lamp switch is turned off, the first relay is disconnected and the rear fog lamp is turned off. The rear fog lamp can be turned off independently of any other lamps through the rear fog lamp switch and the first relay, and can only be turned on when any one of the high beam lamp, low beam lamp and front fog lamp is turned on. At the same time, the rear fog lamp can work continuously until the high beam lamp, low beam lamp and front fog lamp are all turned off. No controller is required, thereby reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle light control, and in particular to a rear fog light control circuit, a device and a vehicle based on discrete components. Background Art

[0002] Rear fog lights are a set of red signal lights mounted on the rear of a vehicle, improving rear visibility in low-visibility conditions. Their primary function is to enhance visibility behind the vehicle in low-visibility conditions such as fog, snow, rain, or dust, making it easier for other road users to spot the vehicle, thereby maintaining a safe distance and reducing the risk of rear-end collisions. Existing technology uses a controller to control the on and off of rear fog lights. However, existing controllers are costly and difficult to turn off independently of other lights. Summary of the Invention

[0003] Embodiments of the present invention provide a rear fog lamp control circuit, device, and automobile based on discrete components to address the technical problems in the related art of high cost of existing controllers for controlling rear fog lamps and difficulty in turning off the rear fog lamps independently of other lamps.

[0004] In a first aspect, a rear fog lamp control circuit based on discrete components is provided, comprising:

[0005] A rear fog lamp switch connected to the front fog lamp, low beam lamp, and high beam lamp;

[0006] a first relay connected to the rear fog lamp switch, a power supply, and the rear fog lamp;

[0007] When any one of the front fog lamp, the low beam lamp, and the high beam lamp is turned on and the rear fog lamp switch is turned on, the first relay is closed and the rear fog lamp is turned on; when the front fog lamp, the low beam lamp, and the high beam lamp are all turned off or the rear fog lamp switch is turned off, the first relay is disconnected and the rear fog lamp is turned off.

[0008] In some embodiments, the rear fog lamp switch is a self-resetting rocker switch having three gear positions, namely, an on gear, an off gear, and a reset gear.

[0009] In some embodiments, the rear fog lamp control circuit based on discrete components further includes:

[0010] A fourth diode, wherein the cathode of the fourth diode is connected to the on position of the rear fog lamp switch, the anode of the fourth diode is connected to the first relay and the rear fog lamp, and the fourth diode is used to maintain power supply to the first relay.

[0011] In some embodiments, the rear fog lamp control circuit based on discrete components further includes:

[0012] a first diode, wherein the anode of the first diode is connected to the front fog lamp, and the cathode of the first diode is connected to the on position of the rear fog lamp switch;

[0013] a second diode, wherein the anode of the second diode is connected to the low beam lamp, and the cathode of the second diode is connected to the on position of the rear fog lamp switch;

[0014] A third diode, wherein the anode of the third diode is connected to the high beam lamp, and the cathode of the third diode is connected to the on position of the rear fog lamp switch.

[0015] In some embodiments, the rear fog lamp control circuit based on discrete components further includes:

[0016] An alarm switch unit, the alarm switch unit being connected to a power source, an ignition switch, and an on position of the rear fog lamp switch, the alarm switch unit being configured to be turned on when the ignition switch is turned off;

[0017] An alarm unit is connected to the alarm switch unit through the on position of the rear fog lamp switch. The alarm unit is also connected to the door switch and is used to send an alarm signal when the alarm switch unit is turned on, the rear fog lamp switch is turned on and the door switch is turned on.

[0018] In some embodiments, the alarm switch unit includes:

[0019] A second relay, one end of the second relay is connected to the power supply and the ignition switch, and the other end is connected to the on position of the rear fog lamp switch, and the ignition switch controls the second relay to be closed or opened.

[0020] In some embodiments, the alarm switch unit further includes:

[0021] a fifth diode, wherein an anode of the fifth diode is connected to the ignition switch, and a cathode of the fifth diode is connected to the second relay;

[0022] A sixth diode, wherein an anode of the sixth diode is connected to the ignition switch, and a cathode of the sixth diode is connected to the second relay.

[0023] In some embodiments, the alarm unit is a buzzer, one end of the buzzer is connected to the on position of the rear fog lamp switch, and the other end is connected to the door switch.

[0024] In a second aspect, a rear fog lamp control device based on discrete components is provided, comprising the aforementioned rear fog lamp control circuit based on discrete components.

[0025] In a third aspect, a vehicle is provided, comprising the aforementioned rear fog lamp control device based on discrete components.

[0026] The beneficial effects brought about by the technical solution provided by the present invention include:

[0027] An embodiment of the present invention provides a rear fog lamp control circuit, device, and automobile based on discrete components. The rear fog lamp control circuit based on discrete components includes a rear fog lamp switch and a first relay. The rear fog lamp switch is connected to the front fog lamp, the low beam lamp, and the high beam lamp. The first relay is connected to the rear fog lamp switch, a power supply, and the rear fog lamp. When any one of the front fog lamp, the low beam lamp, and the high beam lamp is turned on and the rear fog lamp switch is turned on, the first relay is closed and the rear fog lamp is illuminated. When the front fog lamp, the low beam lamp, and the high beam lamp are all turned off or the rear fog lamp switch is turned off, the first relay is opened and the rear fog lamp is extinguished. The rear fog lamp can be turned off independently of any other lamps through the rear fog lamp switch and the first relay. The rear fog lamp can be illuminated only when any one of the high beam lamp, the low beam lamp, and the front fog lamp is turned on. At the same time, the rear fog lamp can operate continuously until the high beam lamp, the low beam lamp, and the front fog lamp are all turned off. No controller is required, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A circuit schematic diagram of a rear fog lamp control circuit based on discrete components provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The embodiments of the present invention provide a rear fog lamp control circuit, device and automobile based on discrete components, which can solve the technical problems in the related art that the existing controller for controlling the rear fog lamp is high in cost and makes it difficult to turn off the rear fog lamp independently of other lamps.

[0032] Figure 1 The invention relates to a rear fog lamp control circuit based on discrete components, comprising: a rear fog lamp switch S1 and a first relay K1. The rear fog lamp switch S1 is connected to a front fog lamp L1, a low beam lamp L2, and a high beam lamp L3. The first relay K1 is connected to the rear fog lamp switch S1, a power supply, and a rear fog lamp L4. When any of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 is turned on and the rear fog lamp switch S1 is turned on, the first relay K1 is closed and the rear fog lamp L4 is turned on. When the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 are all turned off or the rear fog lamp switch S1 is turned off, the first relay K1 is disconnected and the rear fog lamp L4 is turned off.

[0033] The rear fog lamp control circuit based on discrete components of the embodiment of the present invention is provided with a rear fog lamp switch S1 and a first relay K1. The rear fog lamp switch S1 is connected to the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3. The first relay K1 is connected to the rear fog lamp switch S1, a power supply, and the rear fog lamp. When any of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 is turned on and the rear fog lamp switch S1 is turned on, the first relay K1 is closed and the rear fog lamp lights up; when the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 are all turned off, the first relay K1 is closed and the rear fog lamp lights up. When the rear fog lamp switch S1 is on or the rear fog lamp switch S1 is disconnected, the first relay K1 is disconnected, and the rear fog lamp L4 is extinguished. The rear fog lamp L4 can be turned off independently of any other lamps through the rear fog lamp switch S1 and the first relay K1, and the rear fog lamp L4 can be turned on only when any one of the high beam lamp L3, the low beam lamp L2, and the front fog lamp L1 is turned on. At the same time, the rear fog lamp L4 can work continuously until the high beam lamp L3, the low beam lamp L2, and the front fog lamp L1 are all turned off. There is no need to use a controller, which reduces costs.

[0034] As an optional embodiment, in one embodiment of the invention, see Figure 1As shown, the rear fog lamp switch S1 is a self-resetting rocker switch, which has three gears, namely, the open gear ON, the closed gear OFF and the reset gear 0. The open gear of the rear fog lamp switch S1 has six pins, which are the second pin, the sixth pin, the first pin, the fifth pin, the third pin and the seventh pin from left to right. The front fog lamp L1, the low beam lamp L2 and the high beam lamp L3 are all connected to the fifth pin of the rear fog lamp switch S1, and the first relay K1 is respectively connected to the sixth pin and the first pin of the rear fog lamp switch S1; when the rear fog lamp switch S1 is in the reset gear 0, its second pin is connected to the sixth pin, and the rear fog lamp switch S1 will automatically reset to the reset gear 0 after being pressed; when the rear fog lamp switch S1 is in the open gear When ON, its second pin is connected to the sixth pin, the first pin is connected to the fifth pin, and the third pin is connected to the seventh pin; when any one of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 is turned on and the rear fog lamp switch S1 is turned on, the power passes through the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 and then flows through the fifth pin and the first pin of the rear fog lamp switch S1 that are turned on to the first relay K1, so that the first relay K1 is closed, thereby lighting the rear fog lamp L4; when the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 are all turned off or the rear fog lamp switch S1 is turned off, the rear fog lamp switch S1 is in the off position and no pins are connected, then the rear fog lamp L4 is extinguished.

[0035] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the rear fog lamp control circuit based on discrete components further includes: a fourth diode D4, the cathode of the fourth diode D4 being connected to the on position of the rear fog lamp switch S1, the anode of the fourth diode D4 being connected to the first relay K1 and the rear fog lamp L4, the fourth diode D4 being used to maintain power supply to the first relay K1, the cathode of the fourth diode D4 being connected to the second pin of the on position ON of the rear fog lamp switch S1, when the rear fog lamp switch S1 is in the on position ON, power flows through any one of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3, then through the fifth pin and the first pin of the rear fog lamp switch S1 to the first relay K1, and the power flows through the fourth diode D4, then through the second pin and the sixth pin of the on position ON of the rear fog lamp switch S1 to continuously power the first relay K1.

[0036] As an optional embodiment, in one embodiment of the invention, see Figure 1As shown, the rear fog lamp control circuit based on discrete components further includes: a first diode D1, a second diode D2, and a third diode D3. The anode of the first diode D1 is connected to the front fog lamp L1, and the cathode of the first diode D1 is connected to the on position of the rear fog lamp switch S1. The anode of the second diode D2 is connected to the low beam lamp L2, and the cathode of the second diode D2 is connected to the on position of the rear fog lamp switch S1. The anode of the third diode D3 is connected to the high beam lamp L3, and the cathode of the third diode D3 is connected to the on position of the rear fog lamp switch S1. The first diode D1, the second diode D2, and the third diode D3 are all used to prevent current backflow. When the power supply is correctly connected, current is allowed to pass. When the power supply is reversely connected, the high impedance characteristics of the diodes prevent current from passing, thereby protecting the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 from damage by reverse current.

[0037] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the rear fog lamp control circuit based on discrete components also includes: an alarm switch unit and an alarm unit. The alarm switch unit is connected to the power supply, the ignition switch S2, and the on gear of the rear fog lamp switch S1. The alarm switch unit is used to be turned on when the ignition switch S2 is disconnected. The alarm unit is connected to the alarm switch unit through the on gear of the rear fog lamp switch S1. The alarm unit is also connected to the door switch S3 for sending an alarm signal when the alarm switch unit is turned on, the rear fog lamp switch S1 is turned on, and the door switch S3 is turned on. The ignition switch S2 has four gears, namely, the off gear OFF, the ignition gear ACC, the on gear ON, and the start gear ST. The ignition switch S2 has five pins, which are the first pin S, the second pin 1, and the start gear ST from left to right. Pin R, third pin Lg, fourth pin ACC, and fifth pin B. When the ignition switch S2 is in the off position OFF, no pins are connected. When the ignition switch S2 is in the ignition position ACC, its fourth pin ACC is connected to the fifth pin B. When the ignition switch S2 is in the on position ON, its third pin Lg, fourth pin ACC and fifth pin B are connected. When the ignition switch S2 is in the start position ST, its first pin S, second pin R, third pin Lg and fifth pin B are connected. The alarm switch unit is turned on when the ignition switch S2 is in the off position OFF, and power is supplied to the alarm unit through the alarm switch unit, the third pin and the seventh pin of the rear fog lamp switch S1 in the on position, and an alarm signal is issued when the door switch S3 is turned on.

[0038] As an optional embodiment, in one embodiment of the invention, see Figure 1As shown, the alarm switch unit includes: a second relay K2, one end of the second relay K2 is connected to the power supply and the ignition switch S2, and the other end is connected to the on position of the rear fog lamp switch S1. The ignition switch S2 controls the second relay K2 to be closed or opened. The second relay K2 is a normally closed relay and will only be activated to connect the circuit after power is turned on. That is, only when the ignition switch S2 is in the off position OFF, the second relay K2 is activated to connect the circuit. When the ignition switch S2 is in the ignition position ACC, the on position ON, or the start position ST, the second relay K2 is opened, thereby disconnecting the circuit.

[0039] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the alarm switch unit also includes: a fifth diode D5 and a sixth diode D6, the anode of the fifth diode D5 is connected to the ignition switch S2, the cathode of the fifth diode D5 is connected to the second relay K2, the anode of the sixth diode D6 is connected to the ignition switch S2, the cathode of the sixth diode D6 is connected to the second relay K2, the anode of the fifth diode D5 is connected to the third pin Lg of the ignition switch S2 on gear ON and the third pin Lg of the start gear ST, the anode of the sixth diode D6 is connected to the fourth pin ACC of the ignition gear ACC of the ignition switch S2 and the fourth pin ACC of the start gear ACC When the ignition switch S2 is in the on position ON or the start position ST, the power is supplied to the second relay K2 through the fifth diode D5. When the ignition switch S2 is in the ignition position ACC or the on position ON, the power is supplied to the second relay K2 through the sixth diode D6. The second relay K2 is disconnected when the ignition switch S2 is in the ignition position ACC, the on position ON or the start position ST, and is only connected when the ignition switch S2 is in the off position OFF, and transmits power to the third pin and the seventh pin of the on position of the rear fog lamp switch S1, thereby turning on the alarm unit.

[0040] As an optional embodiment, in one embodiment of the invention, see Figure 1As shown, the alarm unit is a buzzer H, one end of the buzzer H is connected to the on position of the rear fog lamp switch S1, and the other end is connected to the door switch S3. The door switch S3 includes a left door switch and a right door switch, which are used to be turned on when the left door or the right door is opened. One end of the buzzer H is connected to the seventh pin of the on position ON of the rear fog lamp switch S1, and the other end of the buzzer H is connected to the left door switch and the right door switch respectively. When the ignition switch S2 is in the off position OFF, the second The relay K2 is closed to connect the circuit, and the power is transmitted to the buzzer H through the second relay K2 and the third and seventh pins of the rear fog lamp switch S1. The buzzer H sounds and sends an alarm signal when the left door switch or the right door switch is turned on. That is, regardless of whether the high beam L3, the low beam L2 or the front fog lamp L1 are on or not, when the ignition switch S2 is turned off or the ignition key is taken out, the vehicle door is not closed, and the rear fog lamp switch S1 is in the on position ON, an alarm signal is issued to remind the driver.

[0041] An embodiment of the present invention also provides a rear fog lamp control device based on discrete components, including the aforementioned rear fog lamp control circuit based on discrete components, the rear fog lamp control circuit based on discrete components including a rear fog lamp switch S1 and a first relay K1, the rear fog lamp switch S1 being connected to the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3, the first relay K1 being connected to the rear fog lamp switch S1, a power supply, and the rear fog lamp L4, when any one of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 is turned on and the rear fog lamp switch S1 is turned on, the first relay K1 is closed and the rear fog lamp L4 lights up; when the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 are all turned off or the rear fog lamp switch S1 is turned off, the first relay K1 is turned off and the rear fog lamp L4 is turned off.

[0042] The rear fog lamp control device based on discrete components of the embodiment of the present invention has a rear fog lamp control circuit based on discrete components provided with a rear fog lamp switch S1 and a first relay K1. The rear fog lamp switch S1 is connected to the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3. The first relay K1 is connected to the rear fog lamp switch S1, a power supply, and the rear fog lamp. When any of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 is turned on and the rear fog lamp switch S1 is turned on, the first relay K1 is closed and the rear fog lamp lights up. When the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 are turned on, the first relay K1 is closed and the rear fog lamp lights up. When the high beam lamps L3 are all disconnected or the rear fog lamp switch S1 is disconnected, the first relay K1 is disconnected and the rear fog lamp L4 is extinguished. The rear fog lamp L4 can be turned off independently of any other lamps through the rear fog lamp switch S1 and the first relay K1, and the rear fog lamp L4 can only be turned on when any one of the high beam lamps L3, the low beam lamp L2, and the front fog lamp L1 is turned on. At the same time, the rear fog lamp L4 can work continuously until the high beam lamp L3, the low beam lamp L2, and the front fog lamp L1 are all disconnected. No controller is required, which reduces costs.

[0043] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the rear fog lamp switch S1 is a self-resetting rocker switch, which has three gears, namely, the open gear ON, the closed gear OFF and the reset gear 0. The open gear of the rear fog lamp switch S1 has six pins, which are the second pin, the sixth pin, the first pin, the fifth pin, the third pin and the seventh pin from left to right. The front fog lamp L1, the low beam lamp L2 and the high beam lamp L3 are all connected to the fifth pin of the rear fog lamp switch S1, and the first relay K1 is respectively connected to the sixth pin and the first pin of the rear fog lamp switch S1; when the rear fog lamp switch S1 is in the reset gear 0, its second pin is connected to the sixth pin, and the rear fog lamp switch S1 will automatically reset to the reset gear 0 after being pressed; when the rear fog lamp switch S1 is in the open gear When ON, its second pin is connected to the sixth pin, the first pin is connected to the fifth pin, and the third pin is connected to the seventh pin; when any one of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 is turned on and the rear fog lamp switch S1 is turned on, the power passes through the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 and then flows through the fifth pin and the first pin of the rear fog lamp switch S1 that are turned on to the first relay K1, so that the first relay K1 is closed, thereby lighting the rear fog lamp L4; when the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 are all turned off or the rear fog lamp switch S1 is turned off, the rear fog lamp switch S1 is in the off position and no pins are connected, then the rear fog lamp L4 is extinguished.

[0044] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the rear fog lamp control circuit based on discrete components further includes: a fourth diode D4, the cathode of the fourth diode D4 being connected to the on position of the rear fog lamp switch S1, the anode of the fourth diode D4 being connected to the first relay K1 and the rear fog lamp L4, the fourth diode D4 being used to maintain power supply to the first relay K1, the cathode of the fourth diode D4 being connected to the second pin of the on position ON of the rear fog lamp switch S1, when the rear fog lamp switch S1 is in the on position ON, power flows through any one of the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3, then through the fifth pin and the first pin of the rear fog lamp switch S1 to the first relay K1, and the power flows through the fourth diode D4, then through the second pin and the sixth pin of the on position ON of the rear fog lamp switch S1 to continuously power the first relay K1.

[0045] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the rear fog lamp control circuit based on discrete components further includes: a first diode D1, a second diode D2, and a third diode D3. The anode of the first diode D1 is connected to the front fog lamp L1, and the cathode of the first diode D1 is connected to the on position of the rear fog lamp switch S1. The anode of the second diode D2 is connected to the low beam lamp L2, and the cathode of the second diode D2 is connected to the on position of the rear fog lamp switch S1. The anode of the third diode D3 is connected to the high beam lamp L3, and the cathode of the third diode D3 is connected to the on position of the rear fog lamp switch S1. The first diode D1, the second diode D2, and the third diode D3 are all used to prevent current backflow. When the power supply is correctly connected, current is allowed to pass. When the power supply is reversely connected, the high impedance characteristics of the diodes prevent current from passing, thereby protecting the front fog lamp L1, the low beam lamp L2, and the high beam lamp L3 from damage by reverse current.

[0046] As an optional embodiment, in one embodiment of the invention, see Figure 1As shown, the rear fog lamp control circuit based on discrete components also includes: an alarm switch unit and an alarm unit. The alarm switch unit is connected to the power supply, the ignition switch S2, and the on gear of the rear fog lamp switch S1. The alarm switch unit is used to be turned on when the ignition switch S2 is disconnected. The alarm unit is connected to the alarm switch unit through the on gear of the rear fog lamp switch S1. The alarm unit is also connected to the door switch S3 for sending an alarm signal when the alarm switch unit is turned on, the rear fog lamp switch S1 is turned on, and the door switch S3 is turned on. The ignition switch S2 has four gears, namely, the off gear OFF, the ignition gear ACC, the on gear ON, and the start gear ST. The ignition switch S2 has five pins, which are the first pin S, the second pin 1, and the start gear ST from left to right. Pin R, third pin Lg, fourth pin ACC, and fifth pin B. When the ignition switch S2 is in the off position OFF, no pins are connected. When the ignition switch S2 is in the ignition position ACC, its fourth pin ACC is connected to the fifth pin B. When the ignition switch S2 is in the on position ON, its third pin Lg, fourth pin ACC and fifth pin B are connected. When the ignition switch S2 is in the start position ST, its first pin S, second pin R, third pin Lg and fifth pin B are connected. The alarm switch unit is turned on when the ignition switch S2 is in the off position OFF, and power is supplied to the alarm unit through the alarm switch unit, the third pin and the seventh pin of the rear fog lamp switch S1 in the on position, and an alarm signal is issued when the door switch S3 is turned on.

[0047] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the alarm switch unit includes: a second relay K2, one end of the second relay K2 is connected to the power supply and the ignition switch S2, and the other end is connected to the on position of the rear fog lamp switch S1. The ignition switch S2 controls the second relay K2 to be closed or opened. The second relay K2 is a normally closed relay and will only be activated to connect the circuit after power is turned on. That is, only when the ignition switch S2 is in the off position OFF, the second relay K2 is activated to connect the circuit. When the ignition switch S2 is in the ignition position ACC, the on position ON, or the start position ST, the second relay K2 is opened, thereby disconnecting the circuit.

[0048] As an optional embodiment, in one embodiment of the invention, see Figure 1As shown, the alarm switch unit also includes: a fifth diode D5 and a sixth diode D6, the anode of the fifth diode D5 is connected to the ignition switch S2, the cathode of the fifth diode D5 is connected to the second relay K2, the anode of the sixth diode D6 is connected to the ignition switch S2, the cathode of the sixth diode D6 is connected to the second relay K2, the anode of the fifth diode D5 is connected to the third pin Lg of the ignition switch S2 on gear ON and the third pin Lg of the start gear ST, the anode of the sixth diode D6 is connected to the fourth pin ACC of the ignition gear ACC of the ignition switch S2 and the fourth pin ACC of the start gear ACC When the ignition switch S2 is in the on position ON or the start position ST, the power is supplied to the second relay K2 through the fifth diode D5. When the ignition switch S2 is in the ignition position ACC or the on position ON, the power is supplied to the second relay K2 through the sixth diode D6. The second relay K2 is disconnected when the ignition switch S2 is in the ignition position ACC, the on position ON or the start position ST, and is only connected when the ignition switch S2 is in the off position OFF, and transmits power to the third pin and the seventh pin of the on position of the rear fog lamp switch S1, thereby turning on the alarm unit.

[0049] As an optional embodiment, in one embodiment of the invention, see Figure 1 As shown, the alarm unit is a buzzer H, one end of the buzzer H is connected to the on position of the rear fog lamp switch S1, and the other end is connected to the door switch S3. The door switch S3 includes a left door switch and a right door switch, which are used to be turned on when the left door or the right door is opened. One end of the buzzer H is connected to the seventh pin of the on position ON of the rear fog lamp switch S1, and the other end of the buzzer H is connected to the left door switch and the right door switch respectively. When the ignition switch S2 is in the off position OFF, the second The relay K2 is closed to connect the circuit, and the power is transmitted to the buzzer H through the second relay K2 and the third and seventh pins of the rear fog lamp switch S1. The buzzer H sounds and sends an alarm signal when the left door switch or the right door switch is turned on. That is, regardless of whether the high beam L3, the low beam L2 or the front fog lamp L1 are on or not, when the ignition switch S2 is turned off or the ignition key is taken out, the vehicle door is not closed, and the rear fog lamp switch S1 is in the on position ON, an alarm signal is issued to remind the driver.

[0050] An embodiment of the present invention further provides an automobile, comprising the aforementioned rear fog lamp control device based on discrete components.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0052] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0053] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be construed in the widest possible manner consistent with the principles and novel features of the present invention.

Claims

1. A rear fog lamp control circuit based on discrete components, characterized in that: include: A rear fog lamp switch connected to the front fog lamp, low beam lamp, and high beam lamp; a first relay connected to the rear fog lamp switch, a power supply, and the rear fog lamp; When any one of the front fog lamp, the low beam lamp, and the high beam lamp is turned on and the rear fog lamp switch is turned on, the first relay is closed and the rear fog lamp is turned on; When the front fog lamp, the low beam lamp, and the high beam lamp are all turned off or the rear fog lamp switch is turned off, the first relay is disconnected and the rear fog lamp is turned off; An alarm switch unit, the alarm switch unit being connected to a power source, an ignition switch, and an on position of the rear fog lamp switch, the alarm switch unit being configured to be turned on when the ignition switch is turned off; an alarm unit, the alarm unit being connected to the alarm switch unit via the on position of the rear fog lamp switch, and the alarm unit being further connected to the door switch, for issuing an alarm signal when the alarm switch unit, the rear fog lamp switch, and the door switch are turned on; The alarm switch unit comprises: a second relay, one end of the second relay being connected to the power supply and the ignition switch, and the other end being connected to the on position of the rear fog lamp switch, wherein the ignition switch controls the second relay to be closed or opened; a fifth diode, wherein an anode of the fifth diode is connected to the ignition switch, and a cathode of the fifth diode is connected to the second relay; a sixth diode, wherein an anode of the sixth diode is connected to the ignition switch, and a cathode of the sixth diode is connected to the second relay; The second relay is disconnected when the ignition switch is in the ignition gear, the open gear, or the start gear, and is only connected when the ignition switch is in the off gear.

2. The rear fog lamp control circuit based on discrete components according to claim 1, characterized in that: The rear fog lamp switch is a self-resetting rocker switch, which is provided with three gears, namely, an open gear, a closed gear and a reset gear.

3. The rear fog lamp control circuit based on discrete components according to claim 2, characterized in that: Also includes: A fourth diode, wherein the cathode of the fourth diode is connected to the on position of the rear fog lamp switch, the anode of the fourth diode is connected to the first relay and the rear fog lamp, and the fourth diode is used to maintain power supply to the first relay.

4. The rear fog lamp control circuit based on discrete components according to claim 3, characterized in that: Also includes: a first diode, wherein the anode of the first diode is connected to the front fog lamp, and the cathode of the first diode is connected to the on position of the rear fog lamp switch; a second diode, wherein the anode of the second diode is connected to the low beam lamp, and the cathode of the second diode is connected to the on position of the rear fog lamp switch; A third diode, wherein the anode of the third diode is connected to the high beam lamp, and the cathode of the third diode is connected to the on position of the rear fog lamp switch.

5. The rear fog lamp control circuit based on discrete components according to claim 1, characterized in that: The alarm unit is a buzzer, one end of which is connected to the on position of the rear fog lamp switch, and the other end of which is connected to the door switch.

6. A rear fog lamp control device based on discrete components, characterized in that: The rear fog lamp control circuit based on discrete components comprises the circuit described in any one of claims 1 to 5.

7. An automobile, characterized in that: The rear fog lamp control device based on discrete components includes the one described in claim 6.

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