JP2857969B2 - Rear fog lamp lighting control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear fog lamp lighting control device for turning on or off a rear fog lamp mounted on a rear part of a vehicle body of an automobile.

[0002]

2. Description of the Related Art In Europe, it is obliged to equip a rear fog lamp at the rear of an automobile body. A vehicle equipped with a rear fog lamp has a rear fog lamp lighting control device for turning on or off the rear fog lamp. (Japanese Patent Application Laid-Open No. 61-22634)
No. 3).

Conventionally, lighting conditions Riyafo grayed lamp by these rear fog lamp lighting control device is generally turned like a timing chart shown in FIG. 12.

As shown in FIG. 12, in this timing chart, when the rear fog lamp switch is turned on while the lamp switch is operated to the head lamp on position, the rear fog lamp is turned on and the rear fog lamp switch is turned on. The rear fog lamp is turned off when it is turned off or when the lamp switch is operated to a tail lamp on position, that is, a head lamp off position.

[0005]

However, in these rear fog lamp lighting control devices, as shown at the timing T0 in the timing chart of FIG.
If the driver forgets to turn off the rear fog lamp switch, the rear fog lamp will be turned on regardless of the driver's intention when the lamp switch is operated to the headlamp on position again, so forgetting to turn off the rear fog lamp occurs. easy.

In view of the above, an object of the present invention is to provide a rear fog lamp lighting control device capable of preventing forgetting to turn off a rear fog lamp.

[0007]

According to a first aspect of the present invention, there is provided a rear fog lamp lighting control device comprising a head lamp switch for turning on a head lamp, a tail lamp switch for turning on a tail lamp, and a front fog lamp. A front fog lamp switch for lighting, a non-holding type rear fog lamp switch for lighting a rear fog lamp, and a light-off state when the rear fog lamp switch is turned on by the head lamp switch on or the front fog lamp switch on. A control circuit for turning on a certain rear fog lamp and turning off the rear fog lamp which is turned on when the tail lamp switch is turned off.

According to a second aspect of the present invention, there is provided a rear fog lamp lighting control device according to the first aspect of the present invention, wherein the rear fog lamp switch is used for turning on the rear fog lamp. A one-knob non-holding type having an ON contact in an open state is characterized.

According to a third aspect of the present invention, there is provided a rear fog lamp lighting control device according to the first aspect of the present invention, wherein the rear fog lamp switch is used for turning on the rear fog lamp. A two-knob non-holding type having an ON contact in an open state and an OFF contact in a normally closed state for turning off a rear fog lamp, wherein the control circuit is configured such that the head lamp switch is turned on or the front fog lamp switch is turned on. A rear fog lamp that is turned off when the on contact of the rear fog lamp switch is turned on is turned on, and is turned on when the tail lamp switch is turned off or the off contact of the rear fog lamp switch is turned off. Is turned off.

[0010]

According to the first aspect of the present invention, when the rear fog lamp switch is turned on when the headlamp switch is turned on or the front fog lamp switch is turned on, the rear fog lamp is turned off by the control circuit. It is turned on. When the tail lamp switch is turned off, the control circuit turns off the rear fog lamp in the lighting state.

In this case, in the rear fog lamp lighting control device of the present invention, since the rear fog lamp switch is of a non-holding type, the rear fog lamp switch returns to the original position after the ON operation. That is, in order to turn on the rear fog lamp once it is turned off, the rear fog lamp switch must be turned on when the lighting conditions are met. Therefore, regardless of the driver's intention, the rear fog lamp is not turned on, and forgetting to turn off the rear fog lamp can be prevented.

According to a second aspect of the present invention, there is provided a rear fog lamp lighting control device according to the present invention, wherein when the head fog switch is turned on or the front fog lamp switch is turned on, the normally open contact of the rear fog lamp switch is turned on. The control circuit turns on the rear fog lamp in the off state.

In the rear fog lamp lighting control device according to the present invention, the turning off contact of the rear fog lamp switch in the normally closed state of the rear fog lamp switch is turned off while the rear fog lamp is turned on. Can be turned off.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a rear fog lamp lighting control device according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, a rear fog lamp lighting control device 10 of this embodiment includes a tail lamp switch 1.
2. It has a headlamp switch 14, a front fog lamp switch 16 and a rear fog lamp switch 18, and the rear fog lamp switch 18 is of a non-holding type. The tail lamp switch 12 is always turned on when the head lamp switch 14 is turned on.

The tail lamp switch 12 is connected to a battery B via a coil 20 B of the tail lamp relay 20.
, And the tail lamp 22 is connected to the battery B via the contact 20A of the tail lamp relay 20. Therefore, when the tail lamp switch 12 is turned on, the contact 20A of the tail lamp relay 20 is closed, and current flows from the battery B to the tail lamp 22.

The headlamp switch 14 is connected to a battery B via a coil of a headlamp relay 24, and a headlamp (not shown) is connected to the battery via a contact (not shown) of the headlamp relay 24. ing. Therefore, when the headlamp switch 14 is turned on, the contact of the headlamp relay 24 is closed, and current flows from the battery to the headlamp.

The front fog lamp switch 16
Are connected to a battery B via a coil of a front fog lamp relay 26, and a front fog lamp (not shown) is connected to the battery via a contact (not shown) of the front fog lamp relay 26. Therefore, when the front fog lamp switch 16 is turned on,
The contact of the front fog lamp relay 26 is closed, and current flows from the battery to the front fog lamp.

The headlamp switch 14 is a diode 3
2, connected to the battery B via a rear fog lamp switch 18, a transistor 33 (NPN type) constituting a control circuit, a coil 30B of a rear fog lamp relay 30 constituting a latch circuit, and a contact 20A of a tail lamp relay 20, The fog lamp switch 16 is connected to the battery B via a diode 28, a rear fog lamp switch 18, a transistor 33 constituting a control circuit, a coil 30B of a rear fog lamp relay 30 constituting a latch circuit, and a contact 20A of a tail lamp relay 20.

Therefore, when the tail lamp switch 12 is turned on, the contact 20A of the tail lamp relay 20 is closed, the head lamp switch 14 or the front fog lamp switch 16 is turned on, and the rear fog lamp switch 18 is turned on, The contact 30A of the rear fog lamp relay 30 is closed and the rear fog lamp 34
An electric current flows through.

At the same time, a current flows through the diode 36 connected to the contact 30A of the rear fog lamp relay 30, and the transistor 38 turns on, so that a new current loop L1
Can be. For this reason, even if both the headlamp switch 14 and the front fog lamp switch 16 are turned off, if the tail lamp switch 12 is on, the transistors 33 and 38 are on and the ground loop of the coil 30B of the rear fog lamp relay 30 is turned on. And the current continues to flow through the rear fog lamp 34.

On the other hand, when the tail lamp switch 12 is turned off, the contact 20A of the tail lamp relay 20 is opened and the current loop to the circuit is cut off, so that regardless of whether the head lamp switch 14 and the front fog lamp switch 16 are on or off, Transistor 33, transistor 38,
All the rear fog lamp relays 30 are turned off, and the rear fog lamp 34 is also turned off. Also, once the rear fog lamp 34 is turned off, the tail lamp switch 12 is turned on again and even if the lighting conditions are met, if the rear fog lamp switch 18 is not turned on again,
The rear fog lamp 34 is not turned on.

Reference numeral 19 in FIG. 1 indicates a night lamp. Next, the operation of the present embodiment will be described with reference to the timing chart of FIG.

As shown in FIG. 2, in the rear fog lamp lighting control device 10 of this embodiment, as shown at the timing T1 in the timing chart of FIG. 2, the tail lamp switch 12 is turned on and the front fog lamp switch 16 is turned on. When the driver turns on the rear fog lamp switch 18 in this state, the rear fog lamp 34 in the unlit state is turned on.

As shown at the timing T2 in the timing chart, when the driver turns off the tail lamp switch 12 while the rear fog lamp 34 is on, the rear fog lamp 34 that is on is turned off.

As shown at the timing T3 in the timing chart, when the headlamp switch 14 and the front fog lamp switch 16 are off even if the tail lamp switch 12 is on, the driver is
Even if the rear fog lamp switch 18 is turned on, the rear fog lamp 34 does not light.

When the driver turns on the rear fog lamp switch 18 while the tail lamp switch 12 is on and the head lamp switch 14 is on, as shown at the position of the timing T4, the rear fog lamp in the off state is also turned on. 34 is turned on.

As described above, in the rear fog lamp lighting control device 10 of the present embodiment, since the rear fog lamp switch 18 is of the non-holding type, the rear fog lamp switch 18 returns to the original position after the ON operation. . That is, in order to turn on the rear fog lamp 34 once it is turned off, the rear fog lamp switch 18 must be turned on again when the conditions of the tail lamp switch 12 being turned on, the front fog lamp switch 16 being turned on, or the headlamp switch 14 being turned on are met. Therefore, regardless of the driver's intention, the rear fog lamp 34 does not light up, and forgetting to turn off the rear fog lamp 34 can be prevented.

A second embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

As shown in FIG. 3, in the rear fog lamp lighting control device 11 of this embodiment, the head lamp switch 14 is connected via a diode 32 to a coil 30B of a rear fog lamp relay 30 forming a latch circuit. The front fog lamp switch 16 is connected to a coil 30B of a rear fog lamp relay 30 via a diode 28. The rear fog lamp relay 30 includes a transistor 33 (PN
(P-type) collector. The emitter of the transistor 33 is connected to the rear fog lamp switch 18, and the rear fog lamp switch 18 is connected to the battery B via the contact 20 A of the tail lamp relay 20. The rear fog lamp 34 is connected to a contact 30A of the rear fog lamp relay 30 connected in series with the contact 20A of the tail lamp relay 20.

Therefore, when the tail lamp switch 12 is turned on, the contact 20A of the tail lamp relay 20 is closed, the head lamp switch 14 or the front fog lamp switch 16 is turned on, and the rear fog lamp switch 18 is turned on, The contact 30A of the rear fog lamp relay 30 is closed and the rear fog lamp 34
An electric current flows through.

At the same time, current flows through the diode 36 connected to the contact 30A of the rear fog lamp relay 30, and the transistor 33 continues to be turned on to form a new current loop L1. For this reason, the headlamp switch 14
Even if both the front fog lamp switch 16 and the front fog lamp switch 16 are turned off, if the tail lamp switch 12 is on, the transistor 38 is on, the ground loop L2 of the coil 30B of the rear fog lamp relay 30 is secured, and the Keeps flowing.

On the other hand, when the tail lamp switch 12 is turned off, the contact 20A of the tail lamp relay 20 is opened, and the current loop L3 to the circuit is cut off. , The transistor 33, the transistor 38, and the rear fog lamp relay 30 are all turned off,
The rear fog lamp 34 is also turned off. Also, once the rear fog lamp 34 is turned off, even if the tail lamp switch 12 is turned on again and the lighting conditions are met, the rear fog lamp 34 is not turned on unless the rear fog lamp switch 18 is turned on again.

FIG. 2 is a timing chart of the rear fog lamp lighting control device 11 of this embodiment.
Further, the same effect as in the first embodiment can be obtained in the rear fog lamp lighting control device 11 of the present embodiment.

Next, a third embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 4, the rear fog lamp lighting control device 40 of the present embodiment includes a contact 30A of the rear fog lamp relay 30 and a coil 30B of the rear fog lamp relay 30 of the rear fog lamp lighting control device 10 of the first embodiment shown in FIG. Is replaced by a PNP power transistor 42 and a transistor 44, respectively, and the timing chart is shown in FIG.
Therefore, the rear fog lamp lighting control device 40 of this embodiment
In this case, the same effect as in the first embodiment can be obtained.

Next, a fourth embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

The same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 5, the rear fog lamp lighting control device 46 of this embodiment comprises a contact 30A of the rear fog lamp relay 30 and a coil 30B of the rear fog lamp relay 30 of the rear fog lamp lighting control device 10 of the first embodiment shown in FIG. Is replaced by an NPN power transistor 48 and a transistor 44, respectively, and the timing chart is shown in FIG.
Therefore, the rear fog lamp lighting control device 40 of this embodiment
In this case, the same effect as in the first embodiment can be obtained.

Next, a fifth embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the rear fog lamp lighting control device 10 of the first embodiment shown in FIG. 1, in order to maintain the ON state of the rear fog lamp relay 30, the transistor 38 is turned on to secure the ground loop L2 of the coil 30B of the rear fog lamp relay 30. Instead, as shown in FIG. 6, in the rear fog lamp lighting control device 50 of this embodiment, when the tail switch 12 is turned on instead of the transistor 38, the ground loop of the coil 30B of the rear fog lamp relay 30 is turned on. L2 is secured, and its timing chart is shown in FIG. Therefore, in the rear fog lamp lighting control device 40 of this embodiment, the same effects as those of the first embodiment can be obtained, and the circuit can be simplified because the transistor 38 can be omitted.

Next, a sixth embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIGS.

The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 7, the rear fog lamp switch 18 of the rear fog lamp lighting control device 52 of this embodiment has a normally open (hereinafter referred to as NO) 18A as an ON knob and a normally closed (hereinafter NC) as an OFF knob. 2) 18B
It is a knob non-holding type.

The headlamp switch 14 is a diode 3
2 is connected to a rear fog lamp relay 30 via a front fog lamp switch 16.
28 , it is connected to a rear fog lamp relay 30. NC18B and NO18A of the rear fog lamp switch 18 are connected in series to the rear fog lamp relay 30 and NO18A of the rear fog lamp switch 18 is connected.
Is connected to the battery B via the contact 20A of the tail lamp relay 20.

The rear fog lamp 34 is connected to the battery B via a contact 30A of the rear fog lamp relay 30 and a contact 20A of the tail lamp relay 20.

Therefore, when the tail lamp switch 12 is turned on, the contact 20A of the tail lamp relay 20 is closed, and the head lamp switch 14 or the front fog lamp switch 16 is turned on, the NO 18A of the rear fog lamp switch 18 is turned on. When done
The contact 30 </ b> A of the rear fog lamp relay 30 is closed, and current flows through the rear fog lamp 34.

At the same time, a current flows through the contact 30A of the rear fog lamp relay 30, the transistor 33 is turned on, and a new current loop L1 via the diode 36 is turned on.
Can be. For this reason, even if both the headlamp switch 14 and the front fog lamp switch 16 are turned off, if the tail lamp switch 12 is on, the transistor 33 is on and the rear fog lamp relay 3
Since the current flows through the coil 30B and the contact 30A is closed, the current continues to flow through the rear fog lamp 34.

[0047] On the other hand, if turning off the tail lamp switch 12, opening the contacts 20A of the tail lamp relay 20 is, since the current loop L 1 to the circuit is cut off, on the headlamp switch 14 and the front fog lamp switch 16, related to off The transistor 33 and the rear fog lamp relay 30 are all turned off, and the rear fog lamp 3
4 is also turned off. Further, since the rear fog lamp switch 18 is of the non-holding type, once the rear fog lamp 34 is turned off, the tail lamp switch 12 is turned on again, and even if the lighting conditions are met, the NO 18A of the rear fog lamp switch 18 is turned on again. Otherwise, the rear fog lamp 34 is not turned on.

In this embodiment, the rear fog lamp 3
NC18B of rear fog lamp switch 18 during 4 lighting
Is turned off, the rear fog lamp relay 30 is turned off, so that the rear fog lamp 34 can be turned off.

Therefore, as shown in FIG. 8, in the timing chart of the rear fog lamp lighting control device 52 of this embodiment, as shown at the timing T5, the rear fog lamp switch 18 is turned on while the rear fog lamp 34 is turned on.
By turning off the NC 18B of the rear fog lamp 34
Can be turned off. The timings T1 to T4 in the timing chart are the same as those in the timing chart of the first embodiment (see FIG. 2).

Therefore, the same effect as that of the first embodiment can be obtained in the rear fog lamp lighting control device 52 of this embodiment.

Next, a seventh embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

The same members as those in the sixth embodiment are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 9, the rear fog lamp switch 18 of the rear fog lamp lighting control device 54 of this embodiment is a two-knob non-holding type having NO18A and NO18C. NO18C of this rear fog lamp switch 18
When the NO18C of the rear fog lamp switch 18 is turned on, the base voltage of the transistor 33 drops, the transistor 33 is turned off, and the rear fog lamp 34 can be turned off.

Therefore, the same effect as in the sixth embodiment can be obtained in the rear fog lamp lighting control device 54 of this embodiment.

Next, an eighth embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

The same members as those in the sixth embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the rear fog lamp lighting control device 52 of the sixth embodiment shown in FIG. 7, in order to maintain the ON state of the rear fog lamp relay 30, the transistor 33 is turned on to secure a ground loop of the coil 30B of the rear fog lamp relay 30. However, instead of this, in the rear fog lamp lighting control device 56 of this embodiment, when the tail switch 12 is turned on instead of the transistor 33, the ground loop L2 of the coil 30B of the rear fog lamp relay 30 is turned on, as shown in FIG. Is to be secured. Therefore, in the rear fog lamp lighting control device 56 of this embodiment, the same effect as that of the sixth embodiment can be obtained, and the circuit can be simplified because the transistor 33 can be omitted.

Next, a ninth embodiment of the rear fog lamp lighting control device according to the present invention will be described with reference to FIG.

The same members as those of the sixth embodiment are denoted by the same reference numerals, and the description is omitted. As shown in FIG. 11, in the rear fog lamp lighting control device 58 of this embodiment, the tail lamp switch 12 is
8 is connected to the coil 30B of the rear fog lamp relay 30 via the NC 18B. The headlamp switch 14 is connected to the transistor 3 via the diode 32.
The front fog lamp switch 16 is connected to the base of the transistor 3 via a diode 28.
3 connected to the base. The emitter of the transistor 33 is connected to the battery B via the main fuse 60, and the collector of the transistor 33 is connected to the coil 30B of the rear fog lamp relay 30 via the NO18A of the rear fog lamp switch 18.
The collector of the transistor 33 is connected to the contact 18A of the rear fog lamp relay 30 via the NO 18A of the rear fog lamp switch 18 and the diode 36.

The rear fog lamp 34 is connected to the contact 30 A of the rear fog lamp relay 30 and the main fuse 60.
And to the battery B via

Therefore, when the tail lamp switch 12 is turned on and the head lamp switch 14 or the front fog lamp switch 16 is turned on and the NO 18A of the rear fog lamp switch 18 is turned on, the transistor 33 is turned on and the current loop L1 is turned on. As a result, the contact 30 </ b> A of the rear fog lamp relay 30 is closed, and a current flows through the rear fog lamp 34.

At the same time, the contact 30A of the rear fog lamp relay 30, the diode 36 and the rear fog lamp relay 3
0 coil 30B, N of rear fog lamp switch 18
Since the current flows through C18B and the tail lamp switch 12 to form the current loop L2, even if the NO 18A of the rear fog lamp switch 18 is turned off, the rear fog lamp 34 continues to light. Further, in this case, since the state of the transistor 33 does not affect the opening and closing of the contact 30A of the rear fog lamp relay 30, the head lamp switch 14 and the front fog lamp switch 16
No matter what the state is, the rear fog lamp 34 keeps lighting.

On the other hand, while the rear fog lamp 34 is
When the tail lamp switch 12 is turned off, the current loop L
2, the contact 30A of the rear fog lamp relay 30 is opened, and the rear fog lamp 34 is turned off. Further, since the rear fog lamp switch 18 is of the non-holding type, once the rear fog lamp 34 is turned off, even if the tail lamp switch 12 is turned on again and the lighting conditions are aligned, the NO 18A of the rear fog lamp switch 18 must be turned on again. For example, the rear fog lamp 34 is not turned on.

In this embodiment, the rear fog lamp 3
NC18B of rear fog lamp switch 18 during 4 lighting
Is turned off, the rear fog lamp relay 30 is turned off, so that the rear fog lamp 34 can be turned off.

Therefore, the same effect as in the sixth embodiment can be obtained in the rear fog lamp lighting control device 58 of this embodiment.

In the rear fog lamp lighting control device of each of the above embodiments, the rear fog lamp 34 can be turned off by turning off the NC 18B of the rear fog lamp switch 18 while the rear fog lamp 34 is on.

[0065]

Since the rear fog lamp lighting control device according to the present invention has the above-described configuration, it has an excellent effect that it is possible to prevent forgetting to turn off the rear fog lamp.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a rear fog lamp lighting control device according to a first embodiment of the present invention.

FIG. 2 is a timing chart of the rear fog lamp lighting control device according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram showing a rear fog lamp lighting control device according to a second embodiment of the present invention.

FIG. 4 is a circuit diagram showing a rear fog lamp lighting control device according to a third embodiment of the present invention.

FIG. 5 is a circuit diagram showing a rear fog lamp lighting control device according to a fourth embodiment of the present invention.

FIG. 6 is a circuit diagram showing a rear fog lamp lighting control device according to a fifth embodiment of the present invention.

FIG. 7 is a circuit diagram showing a rear fog lamp lighting control device according to a sixth embodiment of the present invention.

FIG. 8 is a timing chart of a rear fog lamp lighting control device according to a sixth embodiment of the present invention.

FIG. 9 is a circuit diagram showing a rear fog lamp lighting control device according to a seventh embodiment of the present invention.

FIG. 10 is a circuit diagram showing a rear fog lamp lighting control device according to an eighth embodiment of the present invention.

FIG. 11 is a circuit diagram showing a rear fog lamp lighting control device according to a ninth embodiment of the present invention.

FIG. 12 is a timing chart of a rear fog lamp lighting control device according to a conventional example.

[Explanation of symbols]

Reference Signs List 10 Rear fog lamp lighting control device 11 Rear fog lamp lighting control device 12 Tail lamp switch 14 Head lamp switch 16 Front fog lamp switch 18 Rear fog lamp switch 18A Normally open (knob for on) 18B Normally closed (knob for off) 18C Normally open ( Turn-on knob) 20 Tail lamp relay 30 Rear fog lamp relay 33 Transistor 34 Rear fog lamp 40 Rear fog lamp 42 PNP power transistor lighting control device 44 Transistor 46 Rear fog lamp lighting control device 48 NPN power transistor 50 Rear fog lamp lighting control device 52 Rear fog lamp lighting control device 54 Rear fog lamp lighting control device 56 Rear fog lamp lighting control device 5 Rear fog lamp lighting control device

Continued on the front page (72) Inventor Takashi Nakano 1st character Noda, Toyota, Oguchi-machi, Oguchi-machi, Niwa-gun, Aichi Prefecture Inside of Tokai Rika Electric Works, Ltd. Ground: Tokai Rika Electric Works, Ltd. (72) Noriyuki Suzuki, Inventor No. 1 Toyota Noda, Oji-machi, Oguchi-machi, Niwa-gun, Aichi Prefecture Ground: Tokai Rika Electric Works, Ltd. (56) References JP-A-60-143148 (JP, A JP-A-61-226343 (JP, A) JP-A-59-132437 (JP, U) JP-A-57-24147 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60Q 1/22 B60Q 1/20

Claims (3)

(57) [Claims] 1. A head lamp switch for lighting a head lamp, a tail lamp switch for lighting a tail lamp, a front fog lamp switch for lighting a front fog lamp, and a non-holding type for lighting a rear fog lamp. A rear fog lamp switch, and a rear fog lamp which is turned off when the head fog lamp switch is turned on or the front fog lamp switch is turned on and the rear fog lamp switch is turned on is turned on when the tail lamp switch is turned off. A control circuit for turning off a certain rear fog lamp. 2. The rear fog lamp lighting control device according to claim 1, wherein the rear fog lamp switch is a one-knob non-holding type having a normally open ON contact for lighting the rear fog lamp. 3. The rear fog lamp switch is a two-knob non-holding type having a normally open ON contact for turning on the rear fog lamp and a normally closed OFF contact for turning off the rear fog lamp. The control circuit turns on the rear fog lamp which is turned off when the contact for turning on the rear fog lamp switch is turned on by turning on the head lamp switch or the front fog lamp switch, and turning off the tail lamp switch or turning off the rear lamp. 2. The rear fog lamp lighting control device according to claim 1, wherein when the off contact of the fog lamp switch is turned off, the rear fog lamp in the lighting state is turned off.