JPS6322118Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a control circuit device for a brake light for a vehicle, which is equipped with an illuminance switching device for a brake light that turns on in response to depression of the brake pedal.

Brake lights attached to the rear of a vehicle are turned on when the brake pedal is depressed to alert the following vehicles, and play an extremely important role in terms of safety.

For this reason, it is first necessary that the fact that the brake lights are turned on can be clearly recognized by the following vehicle, and for this purpose, it is desirable that the illuminance of the brake lights be high (bright).

On the other hand, if the illuminance of the brake lights is too high, it will be too bright for drivers of cars following.

From the above-mentioned point of view, it is desirable to be able to clearly recognize that the brake light is on and to avoid dazzling the driver of a following vehicle. In particular, the operation status of the brake pedal is a major clue for vehicles following the vehicle to understand the behavior of the vehicle, and the law requires that the brake lights must be illuminated whenever the brake pedal is depressed. With the condition that the brake lights are turned on when the pedal is depressed, it is necessary to solve the problems of ``lighting recognition'' and ``dazzle prevention.''

The present invention was developed in consideration of the above circumstances, and is based on the premise that the brake lights are turned on when the brake pedal is depressed, so that the lighting of the brake lights can be clearly recognized, and the following vehicle can It is an object of the present invention to provide a control circuit device for a brake light for a vehicle, which can also prevent glare from being caused to the vehicle.

In order to achieve the above-mentioned purpose, the present invention assumes four vehicle situations: "daytime", "nighttime", "driving", and "stopped", and calls the following vehicles to be careful. This was done by analyzing how the illuminance of brake lights affects the ``lighting recognition'' and ``blindness'' given to following vehicles, while taking into account the essential role of brake lights. . That is, in the present invention, in a control circuit device for a brake light that is supplied with power and turned on via a stop switch that is turned on and off in response to depression of the brake pedal, there is a stop detection switch that detects when the vehicle is stopped, and a stop detection switch that detects when the vehicle is stopped, and a stop switch that detects when the vehicle is stopped at night. A light switch is connected in series with the stop switch to the power supply circuit of the brake light, and is controlled by the stop detection switch and the light switch, and is turned on only at night and when the vehicle is stopped. An illuminance switching device that reduces the illuminance of the brake light;

With this configuration, during the daytime when the surroundings are extremely bright and there is no risk of dazzling the driver of the following vehicle, the illumination intensity of the brake lights can be increased regardless of whether the vehicle is moving or stopped. Therefore, the following vehicle can surely know that the brake light is turned on.

Furthermore, the illuminance of the brake lights is increased even when the vehicle is driving at night. In other words, at night, lights other than brake lights, such as tail lamps, are turned on, making it relatively difficult to recognize the lighting status of the brake lights.
``Light recognition'' is important because this is extremely important for safety, and because there is a considerable distance between vehicles and the following vehicle while driving, the glare caused to the driver of the following vehicle is not a major problem. This increases the illuminance of the brake lights.

Furthermore, when the vehicle is stopped at night, the illuminance of the brake lights is reduced. In other words, when the vehicle is stopped, especially when a vehicle following the vehicle is very close to the driver at an intersection due to waiting at a traffic light, the glare given to the driver of the vehicle following becomes strong. The safety aspect of ``light recognition'' is also lower than when the vehicle is running, so when the vehicle is stopped at night, the brightness of the brake lights is reduced to emphasize ``prevention of glare.''

In addition to the above, since the brake lights are always turned on when the brake pedal is depressed, it is possible to confirm that there are no abnormalities in the brake lights during work inspections, as is the case in the past.

In addition, as a way to adjust the illuminance of brake lights or turn them on and off as appropriate, Japanese Utility Model Application No. 55-102636,
Publication of Utility Model Publication No. 14576, 1983, and Publication of Utility Model Publication No. 1987-14576.
There is a publication number 13906. In the first publication mentioned above,
A system is disclosed in which the illuminance of a brake light is changed according to the force with which the brake pedal is depressed. Furthermore, in the second publication, in order to reduce the electrical load,
A vehicle has been disclosed in which the brake lights are turned off when the vehicle is stopped, regardless of whether it is day or night. Furthermore, the third publication discloses a device that reduces the illuminance of turn signal lamps and tail lamps at night, regardless of whether the vehicle is running or stopped (there is no disclosure regarding brake lights at all). However, even if it is disclosed in any of the above publications. This is still insufficient from the viewpoints of both "recognition of brake light lighting" and "prevention of dazzling".

An embodiment of this invention will be described below based on the drawings.

In FIG. 1, 1 is a power source, 2 is a headlamp that is supplied with power through a manually operated light switch 3 and turned on, and 4 is a stop switch 6 that is turned on (closed) in response to depression of a brake pedal 5. This is a brake light that is powered by electricity and lights up. An illuminance switching device 7 for changing the illuminance of the brake light 4 is connected in series with the stop switch 6 to the power supply circuit of the brake light 4. The illuminance switching device 7 includes a switch 9 that is turned off by energizing a coil 8 of a relay, and a resistor 10 connected in parallel to the switch 9. Further, the coil 8 is connected in parallel to the headlamp 2, and the power supply circuit of the coil 8 is connected to a stop detection switch 11 which is turned on when detecting a stop of the vehicle. In addition, the above-mentioned stop detection switch 1
Ideally, the switch 1 should be a switch that detects when the vehicle speed has reached 0 km/h, but in reality it could also be a switch that detects when the vehicle speed has become low, for example, below 5 km/h. good.

Next, the operation of the above configuration will be explained.

(1) Daytime During the daytime, light switch 3 remains off (open). Therefore, regardless of whether the stop detection switch 11 is on or off, the coil is not energized and the switch 9 remains on. Therefore, regardless of whether the vehicle is moving or stopped, the stop switch 6 is activated when the brake pedal 5 is depressed.
When the brake light 4 is turned on, power is supplied to the brake light 4 through the switch 9, which has a small resistance, and the brake light 4 is turned on strongly (high illuminance).

(2) At night and while driving At night, the light switch 3 is turned on, and not only the headlights 2 but also the known tail lamps, vehicle side lights, etc. are turned on. At this time, since the vehicle is traveling, the stop detection switch 11 is turned off. Therefore, in this case as well, when the brake pedal 5 is depressed, power is supplied to the brake light 4 via the switch 9 with low resistance. The brake light 4 is turned on strongly (high illuminance).

(3) When the vehicle is stopped at night, the light switch 3 is turned on and the stop detection switch 11 is also turned on. As a result, the coil 8 is energized and the switch 9 is turned off. Therefore, when the stop switch 6 is turned on by depressing the brake pedal 5, power is supplied to the brake light 4 through the resistor 10, and the brake light 4 is turned on with a small illuminance.

In the above configuration, the illuminance of the brake lights 4 decreases when the vehicle stops, but with the configuration shown in FIG. 2, the timing of the decrease in the illuminance of the brake lights 4 can be delayed. That is, in FIG. 2, when the stop detection switch 11 is turned on at night when the light switch 3 is turned on, the timer coil 12 is energized through the light switch 3.
If the switch 13 is turned on after a certain period of time, the coil 8 on the relay side is energized, and the switch 9 is turned off, the illuminance of the brake light 4 can be reduced after a certain period of time after the stop is completed. can.

Further, in place of the resistor 10 of the illuminance switching device 7, a transistor 14 is provided as shown in FIG. The illuminance of the brake light 4 can also be reduced by reducing the effective power supplied to the brake light 4.

In addition, in all of the above embodiments, when the brake pedal 5 is depressed, the brake light 4 is turned on.
As is often done during work inspections, the brake pedal 5 is depressed while the brake light 4 is placed close to a wall surface such as a garage, and whether or not the light emitted from the brake light 4 is reflected on this wall surface is checked. Just check the
It is possible to know whether or not the brake light 4 is abnormal.

As is clear from the above, the present invention
It is possible to optimally deal with the vehicle's situation during the day, at night, while driving, or when the vehicle is stopped, and to satisfy both the conditions of ``recognizing the brake lights'' and ``preventing glare'' from vehicles behind. can.

In addition, the brake lights are designed to turn on when the brake pedal is pressed as long as there is no abnormality with the brake lights, so it is possible to check whether there is an abnormality with the brake lights during work day or night, just as before. .

[Brief description of the drawings]

FIG. 1 is an electrical circuit diagram of a control circuit device for a vehicle brake light according to an embodiment of the present invention. FIGS. 2 and 3 are electrical circuit diagrams showing a modification of this invention. 2: Headlight, 3: Light switch, 4: Brake light, 5: Brake pedal, 6: Stop switch, 7: Illuminance switching device, 11: Stop detection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A control circuit device for a brake light that is supplied with power and turned on via a stop switch that turns on and off in response to the depression of the brake pedal, including a stop detection switch that detects when the vehicle is stopped, and a stop switch that detects when the vehicle is stopped, A light switch is connected in series with the stop switch to the power supply circuit for the brake light, and is controlled by the stop detection switch and the light switch to turn on the light at night and when the vehicle is stopped. A control circuit device for a brake light for a vehicle, comprising: an illuminance switching device that reduces the illuminance of the brake light;