JPS6336840Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a lighting device for a lighting lamp, and particularly to a lighting control device for a headlight of an automobile.

BACKGROUND TECHNOLOGY In general, when driving at night or in a dark place such as a tunnel, cars turn on their headlights or interior lights to gain visibility, but when the outside world becomes bright, especially when driving outside from a tunnel, When the visibility suddenly gets brighter, it can be inconvenient to drive without realizing that the lights are on. For this reason, the battery was often wasted unnecessarily.

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above, and an object of the present invention is to provide a lighting control device for automobile lighting that is capable of preventing battery consumption caused by forgetting to turn off the switch. The lighting device for automobile lighting according to the present invention automatically turns off the lighting after a certain period of time when the lighting is turned on by the lighting start switch, and also notifies the driver in advance that the lighting will be turned off before turning off the lighting. It consists of a lighting control circuit. Therefore, even if the driver forgets to turn off the lights, the illumination lights are automatically turned off after a predetermined set time has elapsed, thereby preventing battery consumption.
Furthermore, if you wish to keep the light on for an alarm such as an alarm, if you operate the light on again, the light will be automatically turned off after a certain period of time, and a warning will be given when the light is turned off.

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows an embodiment of the lighting control circuit for automobile lighting according to the present invention, which includes two pulse generating circuits (hereinafter referred to as monostable multivibrators) 1 and 2 and one pulse generating circuit. The logical sum circuit 3 is used to control the lighting of the lighting device 4, and an alarm 5 is sounded to warn the driver before the lighting device 4 is turned off. That is, in the figure, 6 is a start switch for lighting, which is connected to the set terminal S of the first monostable multivibrator 1, and when switch 6 is pressed, a trigger input is given to this monostable multivibrator 1. . This monostable multivibrator 1 is
As shown, variable resistor V _R1 and capacitor C ₁
The switch ₆ outputs a first pulse having a constant pulse width T ₁ at its output terminal Q in response to a trigger input of the switch 6 as shown in FIG. 2a. The time width _T1 of this first pulse is set to an arbitrary value by selecting the resistance value of the variable resistor V _R1 and the capacitance value of the capacitor C.

Next, the terminal Q of the monostable multivibrator 1 is branched into two parts, one of which is connected to the OR circuit 3, and the other to the second monostable multivibrator 2.
is connected to the set terminal S of the This monostable multivibrator 2 also has a variable resistance V _R2 as shown in the figure.
and is connected to the power supply V _CC via a capacitor C ₂ and is triggered by the application of a pulse generated by the first monostable multivibrator 1, and a constant pulse width T ₂ shown in FIG. 2b is applied to its output terminal Q. outputs a second pulse having . As shown in the figure, this second pulse rises at the trailing edge of the first pulse, and the time width _T2 of the pulse is arbitrarily set by the resistance value of the variable resistor V _R2 and the capacitance value of the capacitor C. Terminal Q of monostable multivibrator 2 is 2
One of them is connected to the logical sum circuit 3 together with the terminal Q of the first monostable multivibrator 1, and the other is connected to an alarm 5 consisting of, for example, a buzzer.
connected to the power supply drive circuit. OR circuit 3 includes first and second monostable multivibrators 1 and 2.
The third pulse having a pulse width of T ₁ +T ₂ shown in FIG. 2C is output on the output side. The output of the OR circuit 3 is connected to a power supply driving circuit of a lighting device 4 such as a headlight. Further, 7 is a reset switch for turning off the light, which is connected to the reset terminal R of the monostable multivibrators 1 and 2, and when the switch 7 is pressed, the lighting control circuit is returned to the state before the start.

Next, the operation of the lighting control circuit having such a configuration will be described. First, when the driver reaches a dark place such as a tunnel while driving, he or she lightly touches the start switch 6 to turn on the lighting device 4. The lighting device 4 lights up during a period of timing T ₁ +T ₂ shown in FIG. 2C. During the final _T2 period of this lighting period _T1 + _T2 (T2 period shown in FIG. _2b ), the buzzer 5 of the alarm is activated to notify the driver that the light will be turned off. If the driver leaves it as it is at this time, both the lighting device 4 and the alarm will open after a predetermined period of time. If the driver wishes to continue lighting the lighting device 4, he/she should lightly touch the reset switch 7 to return to the state before starting, that is, to open the lighting device 4 and buzzer 5 circuits, and then operate the start switch 6. Bye. If the buzzer 5 is activated and the reset switch 7 is operated after _t1 and the start switch 6 is operated after _t2 , there will be a slight time difference between operating the reset switch 7 and the start switch 6 (as shown in Figure 2C). Period of W= _t2 - _t1 ) The lighting device 4 is turned off. Therefore, it is desirable to use a structure in which the start switch 6 operates in conjunction with the reset switch 7.

FIG. 3 shows another embodiment of the present invention, in which the buzzer alarm in the above embodiment is replaced by a visual alarm using a monitor lamp. That is,
The lighting device for automobile lighting of this embodiment is the same as that of the previous embodiment except that the alarm buzzer 5 in FIG. The same functional parts are indicated by the same symbols and their explanations are omitted. The oscillator 9 has a frequency of about 1 Hz, for example, and is triggered by the output of the second monostable multivibrator 2 to output repetitive pulses as shown in FIG. 4d. Further, the second OR circuit 10 is connected to the output terminals of the first monostable multivibrator 1 and the oscillator 9, and outputs the OR output pulse of both as shown in FIG. Input to the power supply driving circuit.

In the lighting device for automobile lighting having such a configuration, when the start switch 6 is operated, the lighting device 4 is turned on and is turned on for a period of T ₁ +T ₂ and then turned off automatically, as in the previous embodiment. and the last light goes out
During the _T2 period, the monitor lamp 8 repeatedly blinks at the oscillation frequency of the oscillator 9 to warn the driver. In this case, if the driver leaves it as is, both the lighting device 4 and the monitor lamp 8 will go off. Further, if it is desired to continue lighting the lighting device 4, by operating the start switch 6, the lighting device and the monitor lamp 8 continue to be lit, as shown in FIGS. 4c and 4e. In this embodiment, the lighting device 4 can be turned on continuously by simply pressing the start switch 6, and unlike the previous embodiment, the lighting device 4 is temporarily turned off by operating the reset switch 7, which is inconvenient. It disappears. Further, in order to turn off the lighting device, the reset switch 7 can be pressed.

[Brief explanation of the drawing]

Figure 1 is an embodiment of the present invention, which is a lighting control circuit diagram for automobile lighting, Figure 2 is a waveform diagram showing the operation of each part in Figure 1, and Figure 3 is another embodiment of the invention, which is a lighting control circuit diagram for automobile lighting. The lighting control circuit diagram, FIG. 4, is a waveform diagram showing the operation of each part in FIG. 3. 1...First pulse generation circuit (monostable multivibrator), 2...Second pulse generation circuit (monostable multivibrator), 3...OR circuit,
4... Illumination light (lighting device), 5... Alarm (buzzer), 6... Start switch, 8... Alarm (monitor lamp).

Claims (1)

[Scope of utility model registration request] a lighting start switch; a first pulse generating circuit that is triggered by the operation of the start switch and outputs a first pulse having a first pulse width;
a second pulse generation circuit that outputs a second pulse that rises at the trailing edge of the pulse and has a second pulse width; an OR circuit that outputs the OR output of the first and second pulses; 1. A lighting control circuit for automobile lighting, comprising: an illumination lamp that is controlled to blink in accordance with the sum output; and an alarm that gives an alarm for the second pulse generation period.