JPH0521781B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automobile lighting device cleaner for cleaning automobile lighting devices.

[Conventional technology]

Generally, among automobile lighting equipment, headlamps tend to have a film of mud, dirt, etc. attached to them, resulting in poor illumination. Alternatively, a cleaner has been proposed that removes a film of dirt by intermittently spraying a cleaning liquid such as water.

[Problem to be solved by the invention]

However, since these conventional devices spray cleaning fluid intermittently, they require less cleaning fluid than those that spray continuously, but the cleaning operation must be stopped manually at the appropriate time. Because of this, they tend to run longer than necessary, and a large amount of cleaning fluid is also required.

For this reason, a large cleaning liquid tank must be used, but modern automobiles are equipped with many devices, and there may be no space to install a large cleaning liquid tank.

[Means for Solving the Problems] In order to solve these problems, this invention has the following features:
The cleaning liquid is sprayed once and then after a predetermined period of time has elapsed, the cleaning liquid is sprayed once again.

[Effect]

After a predetermined period of time elapses after the first cleaning liquid is sprayed, the cleaning liquid soaks into the dirt and softens the dirt film, and then the cleaning liquid is sprayed again.

〔Example〕

FIG. 1 is a circuit diagram showing one embodiment of the present invention. In the figure, 1 is the ignition switch,
2 is a cleaner motor that injects cleaning liquid into the headlight of a car, 3 is a battery, 4 is a cleaner switch, 5 is a first timer, 6 is a second timer,
Reference numeral 7 designates a third timer, and reference numeral 8 designates a transistor that functions as a fourth timer that generates an output signal when only one of timer 6 and timer 7 generates an output signal. The timer 6 is configured to have a longer operating time than the timer 5, and the timer 7 is configured to have a longer operating time than the timer 6. In addition, 5s
is the relay, 5t is the contact of relay 5s, 5i~5
is a diode.

Timer 5 includes resistors 5a to 5f, diode 5g,
5h, 5m, capacitor 5n, transistor 5p
It is composed of ~5r. Timer 6 is resistor 6
a to 6e, diodes 6f to 6h, a transistor 6i, and a capacitor 6j. The timer 7 includes resistors 7a to 7h, diodes 7i to 7j,
It is composed of transistors 7k to 7n and a capacitor 7p.

The operation of the device configured in this way is as follows. First, by turning on the ignition switch 1, a voltage is supplied to the base of the transistor 5p via the resistor 5e and the diode 5m, so the transistor 5p is turned on, which turns on the transistor 5q. . Similarly, transistor 6i, transistors 7k, 7
turns on. In addition, capacitors 5n, 6j, 7
Since p is charged through resistors 5f, 6e, 7h, these capacitors are charged through resistors 5f, 6e, 7h.
side terminal is positively charged. Normally, it waits in this state.

Now, when the cleaner switch 4 is turned on to clean the headlamp, the capacitor 5n,
Since one ends of transistors 6j and 7p are grounded through diodes 5j to 5, transistors 5p, 6i,
As shown in FIG. 2, the base of 7k decreases by the value of the voltage V charged in the capacitors 5n, 6j, and 7p, and becomes a negative voltage. Therefore, the transistors 5p, 6i, and 7k, which have been on until now, are turned off. As a result, the transistor 5q is turned off, the transistor 5r is turned on, the relay 5s is driven, and the contact 5t is turned on, so that the cleaner motor 2 is driven and the cleaning liquid is injected. Also,
When the transistor 7k is turned off, the transistor 7 is turned off and the transistors 7m and 7n are turned on. Furthermore, since the transistor 6i is off, no voltage drop occurs across the resistor 6b, and the transistor 8 is off with no base-emitter voltage supplied.

After the base voltages of the transistors 5p, 6i, and 7k become negative, they rise as shown in FIG. 2 as the capacitors 5n, 6j, and 7p discharge, and become positive after a predetermined period of time. Since the timer 5 is selected to have the shortest period until it becomes positive, the timer 5 ends its operation when the period T1 has elapsed, as shown in FIG. 3a. At this time, timer 6,
7 is still operating, the transistor 8 continues to be off, and the relay 5s is no longer driven by the timer 5 and stops operating as shown in FIG. 3b.

Next, when the period T2 elapses, the timer 6 also ends its operation, as shown in FIG. 3c. As a result, the transistor 6i is turned on, and a voltage drop occurs across the resistor 6a, so that the transistor 8 is supplied with the base-emitter voltage and turned on.As shown in b, the relay 5s is driven again, and the cleaning liquid is sprayed. It is done.

When a further period of time has elapsed, the timer 7 ends its operation as shown in FIG. 3d. As a result, transistors 7k and 7 are turned on, transistor 7m is turned off, and no current is supplied to transistor 8. Therefore, the relay 5s stops operating as shown in b.

Therefore, after the cleaning liquid is injected once as shown in FIG. 3b, it is injected again after the period T4 has elapsed. Therefore, the cleaning liquid sprayed first is T
During the period 4, the dirt film adhering to the headlamp has sufficiently penetrated and the film has become soft. Then, after the period T4, the cleaning liquid is sprayed again, so that the film adhering to the headlamp is washed away by the cleaning liquid sprayed for the second time.

Note that the transistor 7n is the cleaner switch 4.
When is pressed once, capacitors 5n, 6j, 7p
This is for connecting one end of the terminal to ground during the period T3.

〔Effect of the invention〕

As explained above, in this invention, the cleaning liquid is intermittently sprayed only twice based on the time difference between three timers with different operating times, so that the first spray of the cleaning liquid coats the dirt film. It soaks in and softens the dirt film, and the next spray of cleaning solution washes away the dirt.

In other words, since the cleaning liquid only needs to be sprayed twice, the amount of cleaning liquid used is smaller than that of the conventional system, and the cleaning liquid tank is also smaller, resulting in a greater degree of freedom in installation.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a graph showing changes in charging voltage of a capacitor over time, and FIG. 3 is a waveform diagram of each part. 1...Ignition switch, 2...Cleaner motor, 4...Cleaner switch, 5, 6,
7, 8...Timer.

Claims (1)

[Claims] 1. In an automotive lighting cleaner that simultaneously injects cleaning liquid to a pair of lighting devices installed in a vehicle to clean the lighting devices when the cleaner motor is driven, when operating power is supplied. a first switching circuit 5s, 5t that drives the cleaner motor 2; a first timer 5 that controls the first switching circuit to be on for a first time from when the cleaner switch 4 is turned on; A second timer starts operating at the same time as the first timer 5 and remains on for a second time longer than the first timer.
The timer 6 starts operating simultaneously with the first and second timers, remains on for a third time longer than the second timer, and switches on the first for the time difference between the on-states of the second and third timers. A third timer outputs the operating voltage of the circuit 5s, and the second timer maintains an off state while the second timer is operating, and after the second timer operates, the operating voltage is transferred from the third timer to the first switching. A lighting device cleaner for an automobile, comprising a second switching circuit 8 for supplying power to the circuit.