JPS62205845A - Cleaner for illuminator - Google Patents

Abstract

PURPOSE:To clean an outdoor illuminator effectively with a small amount of washing by injecting washing again for a time shorter than the first time after a predetermined time has elapsed since the first injection of washing. CONSTITUTION:When both an ignition switch 1 and a lamp switch 6 are 'on', if a cleaner switch 4 is turned on, an earthing condition is established to all circuits. Then a capacitor C2 is charged depending on the time constant which is determined by its capacity and resistance R2, and its terminal voltage is increased as charging progresses. And when the second predetermined time has elapsed since th start of charging, as a comparator IC3 outputs a signal of (1) level, the signal of (1) level is applied to a transistor Q4 through a diode D4 and a resistor 17. As a result, the transistors Q4 and Q6 are turned on for driving a relay Ry again so as to start cleaning.

Description

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

[Conventional technology]

The surface of illuminators installed in outdoor equipment tends to get dirty, and in particular, the illuminance of automobile headlights tends to decrease due to a film of dirt and dust adhering to them. Spray a cleaning liquid such as water for about 0°65 seconds,
A cleaner has been proposed that removes a film of dirt using water of about 78α.

[Problem that the invention seeks to solve]

However, with such conventional devices, if dirt cannot be removed with one cleaning, the cleaning must be performed again, requiring a large amount of cleaning fluid, and requiring the use of a large cleaning fluid tank. equipment has been implemented,
There may be cases where there is no space to install a large cleaning liquid tank.0 [Means for solving the problem] In order to solve this problem, the present invention provides that after a predetermined period of time has elapsed after spraying the cleaning liquid, the first The cleaning liquid is sprayed again for a shorter time than the spraying time.

[Effect]

Dirt left behind by the first cleaning and dirt-laden drops running down the glass window are washed away in subsequent cleanings.

〔Example〕

FIG. 1 is a circuit diagram showing one embodiment of the present invention. In the figure, 1 is an ignition switch, 2 is a cleaner motor that injects cleaning liquid into the headlights of a car, for example,
3 is a battery, 4 is a cleaner switch, 5 is an illumination lamp such as a headlight, 6 is a lamp switch, 7 is a control circuit, and 8 is a fuse.

The control circuit 7 includes resistors R1 to R23, transistors Q1 to Q
6, Zener diode ZD, capacitors C1 to C6,
Diodes D1-D7. Comparator IC1 ~ engineering C4,
It is composed of relay RY. Among these, resistance R10
, R15, R16, capacitor C5, comparator IC
4 constitutes the first timer, resistors R9, R14, capacitor C4, lamp (lator IC3 constitutes the second timer, resistors R7, R11 to R13, capacitor C3, comparator IC2 constitute the third timer) In addition,
C1 is a capacitor for preventing oscillation of comparators IC1 to IC4. C3 to C5 are for preventing oscillation of comparators IC2 to IC4, and capacitor C6 is for preventing hold transistor Q3 from turning on when ignition switch 1 is turned on. oThe constant voltage circuit including transistor Q1 is The operation of the device thus constructed is as follows. In this device, it is assumed that the ignition switch 1 and the lamp switch 6 are in the on state. When the cleaner switch 4 is turned on in this state, the entire circuit is grounded.

By forming a ground circuit, capacitor C2 is charged according to a time constant determined by its capacitance and resistor R2, and as charging progresses, its terminal voltage increases as shown in Figure 2. IC2~IC4
0 The voltage at the inverting input terminal and the voltage at the non-inverting input terminal are set as follows.0 First, at the start of charging, the voltage at the inverting input terminals of comparators IC2 and IC4 is set lower than the voltage at the non-inverting input terminal. υ, comparator IC3t
The voltage at the inverting input terminal is higher than the voltage at the non-inverting input terminal when the terminal voltage of the capacitor C2 reaches vl, and when the comparator IC2 reaches v3, the voltage at the non-inverting input terminal is set to 0. (Rator ■C3 is set so that the voltage at the non-inverting input terminal becomes higher than the voltage at the inverting input terminal when the terminal voltage of capacitor C2 reaches vl. Immediately after the start of charging the 0 capacitor C2 to which each constant is set, the color comparators IC2 and IC4 send out signals at the rIJ level, and the comparator IC3 sends out a signal at the rOJ level. Then, the output of comparator IC2 is “
1", the comparator ICI outputs an "O" level signal, so that the transistor Q2. Q3 is not on, and the output of comparator IC4 causes transistors Q4. Since Q6 is turned on, relay RY is driven, cleaning liquid is injected, and cleaning starts. When time T1 has elapsed from the start of charging, as mentioned above, comparator IC4 changes the voltage of the inverting input terminal to the non-inverting input terminal. Since the voltage of comparator I
The output level of C4 changes from "1" level to "0" level. As a result, transistor Q4. Since Q6 is turned off, relay RY is turned off and cleaning of the illuminator is stopped. Then, when time T2 has elapsed from the start of charging, the voltage at the non-inverting input terminal changes to the voltage at the inverting input terminal. The larger the signal, the more it will send out a "1" level signal. As a result, diode D4
and 1'1' to transistor Q4 via resistor R17.
level signal is supplied to transistor Q4. Q
6 is turned on, relay RY is driven again, and cleaning is restarted. At this time, comparator IC4 is rO
Although a J level signal is being sent, if the resistor R16 is set to an appropriate value, the pace potential of the transistor Q4 can be maintained at the voltage necessary to turn on the transistor.

As charging progresses further and time T3 elapses from the start of charging, the output level of comparator IC2 changes from "1" level to "0" level, so the rIJ level signal output from comparator IC3 passes through diode D3. It is absorbed through the comparator IC2K. Therefore, transistor Q4 is turned off, and transistor Q6 is thereby turned off.
is also turned off, relay RY is turned off, and cleaning stops.

Therefore, as shown in FIG.
By performing cleaning for 20 to 0.40 seconds, dirt on the illuminator is washed away. time T
Dirt may remain in some areas even after one lapse of time, and drops containing dirt may flow down the glass surface. For this reason,
After time (T2-TI) (0,2~2 seconds), time (T
3-T2) the cleaning liquid is re-sprayed to wash away any remaining dirt or dirt-laden drops. This second injection is an auxiliary cleaning, and the amount of cleaning can be small, so the injection time can be shorter than the first, 0.05~0.18
Seconds are enough. It was also confirmed through experiments that dirt could be sufficiently cleaned with an average spraying time of 0.41 seconds, so that the amount of cleaning liquid used per use could be reduced by approximately 29 ct.

Next, the holding circuit will be explained. The purpose of the holding circuit is to continue the cleaning operation even if the cleaner switch 4 is turned on for a short time and then turned off. When the cleaner switch 4 is turned on, IC1 sends out an "o" level signal as described above, and transistor Q2. Q3 is on. As mentioned above, the inverting input terminal of IC1 remains at the "1" level from the time when the cleaner switch 4 is turned on until time T3 has elapsed.
After that, the level is changed to "0".

Therefore, once the cleaner switch 4 is turned on and the relay RY is turned on, the output of the comparator IC1 continues at the "0" level until time T3 has elapsed, so the ground circuit of the relay RY is maintained. There is. As a result, relay RY is connected to transistor Q4. The control state is determined by the on or off state of Q6. Therefore, even if the cleaner switch 4 is opened immediately after being pressed, the ground circuit of the relay RY is maintained until time T3.

On the contrary, if the cleaner switch 4 is continuously pressed until the time T3 has elapsed, the output of the comparator ICi changes from the "0" level to the "1" level at the time the time T3 has elapsed, as described above. Therefore, the operation of the washer stops when 3 elapses, which is a short period of time, and the cleaning is stopped.

When the cleaner switch 4 is opened in this state, the ground circuit of the capacitor C2 is opened, so that charging is no longer performed and the capacitor C2 is discharged through the diode D1 and the resistance component in the circuit. Furthermore, even if cleaner switch 4 is opened before time T3 has elapsed, transistor Q3 is turned off and relay RY is turned off after time T3 has elapsed, so that a ground circuit for capacitor C2 is formed. After that, the capacitor C2 is discharged.

The above is the operation when lamp switch 6 is on, but when this switch is off, transistor Q5 is on, so transistor Q6 is also off, and relay RY is turned on. Power is not supplied and cleaning is not performed even if the cleaner switch 4 is pressed. For this reason, cleaning is performed only when the lamp switch 6 is turned on.
Since the cleaning effect can be clearly distinguished and cleaning is not performed during non-illumination when the cleaning effect is difficult to discern, it is possible to prevent the cleaning liquid from being used unnecessarily.

Note that the lamp 5 may be either a headlamp or a taillamp, or may be another lamp.

It is also conceivable to drive the window washer in conjunction with the operation of the cleaner switch 4.

FIG. 4 shows an example when the lamp switch 6 is connected to the ground side. When the lamp switch 6 is on, the transistor Tr50 is on, so the cleaner switch 4
When Q51 turns on, transistor Q51 turns on.
As in the case of FIG. 1, transistor Q4. Relay RY is driven in synchronization with Q6. However, lamp switch 3
If the transistor Q50 is off, the transistor Q51 will not be turned on even if the cleaner switch 4 is turned on, so cleaning will not be performed.

〔Effect of the invention〕

As explained above, in this invention, after a predetermined period of time has elapsed after the cleaning liquid has been injected, the cleaning liquid is injected for a shorter period of time than the initial injection time. Droplets containing flowing dirt can be sufficiently washed away with the second injection, eliminating the need to use large amounts of cleaning liquid as in the past, and the cleaning liquid tank can also be made smaller, giving greater flexibility in installing the washing machine. big shi,
Furthermore, since the creeping performance is improved, there is no need to optimize the positional relationship between the lamp and the nozzle, and the degree of freedom in positioning the nozzle is improved.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a graph showing the charging characteristics of a capacitor, and Fig. 3 is a graph showing the charging characteristics of a capacitor.
FIG. 4 is a circuit diagram showing another embodiment. 1...-Ignition switch, 2...Cleaner motor, 3...Battery, 411#1111 cleaner switch, 5...A112 ring, 6ψ...-Lamp switch, 1...Control circuit, 80... Fuse, R1
-R23...Resistor, Q1-Q6...Transistor, C1-c6...Capacitor, D1-Dr...
・・Diode, IC1~IC4・Fist・・Comparator, RY・・Relay〇

Claims (1)

[Claims] In a lighting device cleaner that sprays a cleaning liquid onto a lighting device installed in an outdoor device to clean the lighting device, the cleaning liquid is sprayed again after a predetermined period of time has elapsed after the first injection of the cleaning liquid, and the cleaning liquid is sprayed again. A lighting device cleaner characterized in that the spraying time is shorter than the spraying time of the previous cleaning liquid.