JPH1053066A - Back-up lamp circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase illumination suitably only at nigh by providing a light emitting element with a current passage passing a back-up switch, inside a light body of a back-up light, and inserting a switch circuit closed at night, into the current passage of the light emitting element. SOLUTION: When illumination in the surroundings becomes the specified value or less at night, a lamp switch is closed sensing the lowering of illuminance in the surrounds, and a current from a power supply 6 is fed to an exciting coil 4a of a relay switch 4 to close the relay switch 4. In this state, when a transmission is set in a back-up position, a back-up switch 2 is closed, and a current from the power supply 6 is fed to a first filament 11 of a back-up light 1. The first filament 11 is thereby lighted to make back-up display. At the same time, the current from the power supply 6 is fed to a second filament 12 of the back-up light 1 through the relay switch 4 in the closed state. Brightness at the lighting time thereby becomes the value close to 5000 candela of a safety standard upper limit so as to be able to obtained sufficient illumination as a floodlight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention is applied to an automobile. The present invention relates to an improvement in a backward lighting circuit that automatically lights when a transmission is set to a reverse position.

[0002]

2. Description of the Related Art Backlights are provided in a pair at the rear of an automobile, and the brightness thereof is specified to be 5000 candela or less according to security standards. In many practical vehicles,
A pair of lamps for generating white light are provided, the brightness of which is about 1000 candela, which is set such that the driver of the following vehicle can be lit even in daylight.

[0003]

On the other hand, there is a demand for using the backward light as an illumination light when the vehicle is moved backward in a dark place at night. In particular, since the rear view of a large vehicle is far from the driver's position, there is a demand to brighten the illuminance of the backward light for a fine driving operation in the garage at night.

[0004] As an improvement for this, there is known an apparatus equipped with another rear lighting device which is turned on by a switch operation (see Japanese Utility Model Application Laid-Open No. 61-54604).

[0005] It is inconvenient to perform a switch operation to increase the illuminance of the backward lighting because the driving operation becomes complicated. Further, if additional lighting equipment is added, the design of the whole vehicle will be changed, which is not appropriate, and the degree of freedom of design will be restricted when a new design is made.

SUMMARY OF THE INVENTION The present invention has been made in view of such a background, and it is an object of the present invention to provide a backward light capable of appropriately increasing the illuminance only at night without requiring the driver to operate a switch. I do. An object of the present invention is to provide a backward light that does not increase the number of steps in the automobile manufacturing process. SUMMARY OF THE INVENTION An object of the present invention is to provide a backward light capable of increasing illuminance at night without changing the design of the entire vehicle.

[0007]

SUMMARY OF THE INVENTION The present invention is characterized by automatically increasing the illuminance of a backward light at night or in a dark indoor.

That is, the present invention is directed to a rearward lamp having a first light emitting element which is arranged in a pair at the rear portion of a vehicle and emits white light, and a transmission provided in a current path of the first light emitting element, the transmission being in a reverse position. In a backward light circuit including a backward switch that is closed in conjunction with the setting, a second light emitting element that is provided inside a lamp body of the backward light and has a current path commonly passing through the backward switch. And a switch circuit inserted into the current path of the second light emitting element and closed at night.

[0009] The switch circuit closed at night is a relay switch interlocked with the lighting circuit of the tail lamp,
It is desirable that the second light emitting element is a second filament provided inside one backward lamp.

In the daytime, when the transmission is set to the reverse position, the reverse switch is closed and the first light emitting element (the first filament or the first lamp) emits light in conjunction with this. At night or in dark indoors with no lighting, the lamp switch automatically closes in response to this, the relay switch is closed in conjunction with this, and the second light emitting element (second filament or second lamp) Emits light. The illuminance of the backward light is increased by the light emission of the second light emitting element, and the brightness required for performing the backward operation in the dark can be obtained.

In the circuit configuration according to the present invention, a second light emitting element is provided in the rearward lighting body, and the second light emitting element is closed when the brightness around the current path of the second light emitting element becomes a predetermined value or less. Since it can be implemented with a change just having a relay switch,
This can be realized without increasing the number of steps in the manufacturing process and without changing the design of the entire vehicle body.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is a circuit diagram showing a configuration of a main part of a first embodiment of the present invention, and FIG. 2 is a perspective view of a rear portion of a vehicle showing a mounting state of a backward light according to the first embodiment of the present invention. FIG.

The first embodiment of the present invention is provided with a pair of reversing lights 1 disposed at the rear of the vehicle, and a reversing switch 2 which is closed when the transmission is set to the reversing position. A first light emitting element that generates white light to indicate that the vehicle is moving backward and a second light emitting element that is a light source for illumination are provided inside the lamp body of the backward light 1. here,
A first filament 11 and a second filament 12 are provided inside one bulb as a first light emitting element and a second light emitting element. The first filament 11 and the second filament 12 are commonly connected to the retraction switch 2, and a relay switch 4 interlocking with the lighting circuit of the tail lamp 3 is inserted into the current path of the second filament 12 as a switch circuit. . A lamp switch 5 is connected to the exciting coil 4a of the relay switch 4. When the lamp switch 5 is closed in response to a decrease in the illuminance of the enclosure, or when the driver operates, the exciting coil 4a of the relay switch 4 is connected to the exciting coil 4a. A current is supplied from a power supply 6.

The lamp switch 5 is used to set a power supply path to each lamp by a driver's operation. When the lamp switch 5 is set to the "auto" position, the illuminance of the enclosure falls below a predetermined value. Automatically closes when “manual”
Is opened and closed by the driver's blinking operation in the position.

Here, the lighting operation of the backward lamp 1 in the first embodiment of the present invention will be described.

When the transmission is set to the reverse position, the reverse switch 2 is closed and the current from the power supply 6 is supplied to the first filament 11 of the reverse light 1 to be turned on. The brightness is set to about 1000 candela so that the driver of the following vehicle can recognize the lighting even in daylight.

In the daytime, the lamp switch 5 is open and the current from the power source 6 is supplied to the relay switch 4
Is not supplied to the exciting coil 4a. Therefore, the relay switch 4 is in the open state, no current is supplied to the second filament 12 of the backward light 1, and only the backward display by the first filament 11 is performed. At this time, no current is supplied to the tail lamp 3 and no lighting display is performed.

At night, when the illuminance of the enclosure falls below a predetermined value, or when the vehicle moves into a dark room, the lamp switch 5 closes automatically in response to the decrease in the illuminance of the enclosure or by a driver's operation. In this state, the current from the power supply 6 is supplied to the exciting coil 4a of the relay switch 4. Accordingly, the relay switch 4 is closed, and the current from the power supply 6 is supplied to the tail lamp 3. The tail lamp 3 is lit by receiving the current supply.

When the transmission is set to the reverse position in this state, the reverse switch 2 is closed, and the current from the power source 6 is supplied to the first filament 11 of the reverse light 1. Thereby, the first filament 11 is turned on to perform the backward display. At the same time, the current from the power supply 6 is supplied to the second filament 12 of the backward light 1 via the relay switch 4 in the closed state. The brightness at the time of lighting is 5000 which is the upper limit of security standards
Set to a value close to candela. Thereby, sufficient illuminance can be obtained as an illumination lamp, and the vehicle can be easily moved backward in the dark.

When the surroundings become bright or the vehicle is moved from a dark indoor to a bright outdoor, the lamp switch 5 is automatically opened in response to the brightness, and the tail lamp 3 and the second filament 12 are opened. Cut off the electrical path to.

(Second Embodiment) FIG. 3 is a circuit diagram showing a configuration of a main part of a second embodiment of the present invention.

In the second embodiment of the present invention, the reverse switch 2 which is closed when the transmission is set to the reverse position is disposed on the power source 6 side, and the grounding side of the relay switch 4 and the reverse light 1 An auxiliary relay switch 7 is provided between the second relay 12 and the second filament 12. The exciting coil 7a of the auxiliary relay switch 7 is connected to the ground side of the reversing switch 2, and the rest is configured as in the first embodiment.

In the second embodiment, the current value supplied to the second filament 12 provided in the backward lamp 1 is large, and it is capacitively difficult to ground through the backward switch 2 shown in the first embodiment. Applies to cases.

Also in this embodiment, the lamp switch 5 is used in the daytime.
Is in the open state, the exciting coil 4 of the relay switch 4
The current from the power supply 6 is not supplied to a. Therefore, the relay switch 4 is in the open state, and there is no current supply to the tail lamp 3. When the transmission is set to the reverse position in this state, the reverse switch 2 is closed, and the current from the power supply 6 is supplied to the first filament 11 of the reverse light 1.
By this current supply, the first filament 11 is turned on to perform a backward display. At the same time, the current from the power supply 6 is supplied to the exciting coil 7a of the auxiliary relay switch 7, and the auxiliary relay switch 7 is closed. However, since the relay switch 4 is open, the current is supplied to the second filament 12 of the backward light 1. Is not supplied with current from the power supply 6.

At night, when the illuminance of the enclosure falls below a predetermined value or when the vehicle moves into a dark room, the lamp switch 5 closes in response to the decrease in the illuminance of the enclosure, and the current from the power supply 5 is reduced. It is supplied to the exciting coil 4a of the relay switch 4. As a result, the relay switch 4 is closed, and the current from the power supply 6 is supplied to the tail lamp 3.

When the transmission is set to the reverse position in this state, the reverse switch 2 is closed in the same manner as in the daytime, and the current from the power source 6 is supplied to the first filament 11 of the reverse light 1 and Is turned on to perform the backward display. At the same time, the current from the power supply 6 is supplied to the exciting coil 7a of the auxiliary relay switch 7, and the auxiliary relay switch 7 is closed.

At this time, since the relay switch 4 is already closed, the current from the power source 6
And, it is supplied to the second filament 12 of the backward light 1 via the auxiliary relay switch 7. Thus, the second filament 12 is turned on with the same brightness as in the first embodiment.

When the enclosure becomes bright or the vehicle moves from a dark indoor to a bright outdoor, the lamp switch 5 is opened in response to the illuminance as in the first embodiment. When the lamp switch 5 is opened, the current supply from the power supply 6 to the exciting coil 4a is stopped, the relay switch 4 is opened, and the tail lamp 3 is turned off.

[0031]

As described above, according to the present invention, it is possible to automatically increase the illuminance of the backward light at the time of driving operation at night or in a dark indoor without operating the switch. As a result, the vehicle can be easily moved backward in a dark place, and can be implemented without increasing the number of steps in the manufacturing process and without changing the design of the entire vehicle.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a main part of a first embodiment of the present invention.

FIG. 2 is a perspective view of a rear portion of the vehicle, showing a mounting state of a backward light according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram showing a configuration of a main part of a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reverse light 2 Reverse switch 3 Tail lamp 4 Relay switch 4a, 7a Excitation coil 5 Lamp switch 6 Power supply 7 Auxiliary relay switch 11 First filament 12 Second filament

Claims (3)

[Claims] 1. A rearward light having a first light emitting element arranged in a pair at a rear portion of a vehicle and generating a white light, and a transmission provided in a current path of the first light emitting element and a transmission set to a reverse position. A backward switch circuit that is closed in conjunction with the second switch, wherein a second light emitting element that is provided inside a lamp body of the backward lamp and has a current path commonly passing through the backward switch; A switch circuit inserted into a current path of the light emitting element and closed at night. 2. The backward light circuit according to claim 1, wherein the switch circuit that is closed at night is a relay switch that works with a lighting circuit of a tail lamp. 3. The backward lighting circuit according to claim 1, wherein the second light emitting element is a second filament provided inside one backward lighting.