JPS6277263A - Lighting fixture cleaner - Google Patents

Abstract

PURPOSE:To allow cleaning with only a small quantity of cleaning liquid said by injecting cleaning liquid once then injecting cleaning liquid again after a predetermined time has elapsed. CONSTITUTION:When a cleaner switch 4 is turned on, a grounding circuit is formed, and a capacitor C2 is charged according to the time constant determined by its capacity and a resistor R2. Immediately after the charging of the capacity C2 is started, transistors Tr2, Tr3, then Tr7, Tr6 are turned on, a relay RY is energized, cleaning liquid is injected to start cleaning. When the time T1 elapses since charging was started, Tr7, Tr6 are turned off, the relay RY is turned off, and the cleaning of a lighting fixture is stopped. When the time T2 elapses, Tr7, Tr6 are again turned on, the relay RY is again energized, and cleaning is restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] 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 car headlamps in particular tend to get coated with mud, dirt, etc. and reduce their illuminance. Spray the cleaning solution for about 0.65 seconds,
A cleaner has been proposed that removes a film of dirt using approximately 78 cc of water.

[Problem that the invention seeks to solve]

However, with such conventional devices, if the dirt cannot be removed with one cleaning, the cleaning is repeated until the dirt is removed, so a large amount of cleaning liquid is required, and a large cleaning liquid tank must be used. Automobiles are equipped with many devices and may not have the space to install a large cleaning liquid tank.

[Means for solving problems]

In order to solve this problem, the present invention is designed to inject the cleaning liquid again after a predetermined period of time has elapsed since the variable current cleaning liquid was injected.

[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 an ignition switch, 2 is a cleaner motor that injects cleaning fluid into the headlights of a car, 3 is a battery, 4 is a cleaner switch, a lighting lamp such as a 5t-1 headlight, 6 is a lamp switch, and T is a control. circuit, 8 is a fuse.

The control circuit T includes resistors R1 to R29 and transistors Tr1 to
Tr7, Zener diode ZD, capacitor 01~C
6. Diode D1~DI, comparator IC1~IC
4. Consists of relay BY. This place, resistance R
18~R22, R24, capacitor C6° comparator IC4 constitutes the first timer, resistors R12~R17,
R23, capacitor C15, transistor Tr4. Comparator IC3t: constitutes a second timer, resistor Rγ
~R11, capacitor C4, and comparator IC2 are the third
The timer is configured. Note that C1 is comparator I
Capacitors 09 to C6 are for comparators I02 to IC4 (7) to prevent oscillation, capacitor C3Fi is used to prevent oscillation of C1 to IC4. When ignition switch 1 is turned on,
This is to prevent the hold transistor Tr3 from turning on. The constant voltage circuit including the transistor Tr1 stabilizes the input voltage to 8 to 16Q - approximately 5V.

The operation of the device configured as described above 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 is turned on in this state, the entire circuit is grounded.

By forming the 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 FIG. Here, comparators IC2 to IC4
The voltage at the inverting input terminal and the voltage at the non-inverting input terminal are set as follows. First, at the start of charging, the voltage at the inverting input terminal is set lower than the voltage at the non-inverting input terminal.

Then, when the terminal voltage of the capacitor C2 reaches vl, the comparator IC4 outputs it, and when the terminal voltage of the capacitor C2 reaches vl, the comparator IC2 outputs Vl.
3, each constant is set so that the voltage at the inverting input terminal is higher than the voltage at the non-inverting input terminal.

Immediately after the start of charging the capacitor C2, the comparators IC2 to IC4 output signals at the ftL4 rlJ level under the above-mentioned condition. For this reason, comparator IC1
outputs a “0” level signal, so the transistor T
r2, Tr3 are not on, and comparator IC4
Since the transistors Tr7 and Tr6 are turned on by the output, the relay RY is driven, the cleaning liquid is sprayed, and cleaning is started.

When the time T1 has elapsed from the start of charging, the voltage at the inverting input terminal of the comparator IC4 becomes higher than the voltage at the non-inverting input terminal as described above.
The output level of the power "1" level is changed to the color rOJ level. As a result, transistor Tr7. Since Tr6 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 comparator IC3 begins to send out a signal at the rOJ level when the voltage at the inverting input terminal is higher than the voltage at the non-inverting input terminal. As a result, the transistor T
r4 is turned on and a signal at rlJ level is supplied to transistor Trγ via resistor R23 and diode D4, so that transistors Tr7. When Tr6 is turned on, relay RY is driven again and cleaning is restarted. At this time, the comparator IC4 is sending out a "0" level signal, but if the resistor R24 is set to an appropriate value, the voltage necessary to turn on the base t and h of the transistor Trγ and the transistor Tr7 can be set to an appropriate value. can be kept.

As the charging progresses further and time T3 has elapsed from the start of charging, the output level of the comparator IC2 changes from the "1" level to the rOJ level, so the "1" level signal that was output via the resistor R23 becomes a diode. It is absorbed into comparator IC2 via D3. Therefore, the transistor Tr7 is turned off, which causes the transistor Tr5 to turn off.
is also turned off, relay RY is turned off, and cleaning stops.

Therefore, as shown in FIG.
After cleaning has been carried out for 0.05 to 0.15 seconds),
The cleaning is stopped for a time (T2-T1) (0.2 to 2 seconds), and during this time the cleaning liquid sprayed at time T1 softens the dirt on the illuminator sufficiently. T2) (0.2~0.4 seconds), so the maximum time is 0.55 seconds (0.1 + 0.4)
By spraying 12cc of water, the illuminator can be completely cleaned, which requires 12cc less water than before.

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 a signal at rOJ level as described above, and transistors Tr2. Tr3 is on. As described above, the inverting input terminal of the IC1 remains at the "1" level from the time when the cleaner switch 4 is turned on until the time T3 elapses, and then changes to the "0" level.

Therefore, once the cleaner switch 4 is turned on and the relay RY is turned on, the output of the comparator ICI continues at the rOJ level until the time T3 has elapsed.
The ground circuit of relay RY is maintained. As a result,
Relay RYt-! The control state is determined by the on or off states of transistors Trγ and Tr6. 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 after the time T3 has elapsed, the output of the comparator IC1 changes from the "0" level to the "1" level at the time when the time T3 has elapsed, as described above. Therefore, after the time T3 has elapsed, the operation of the washer is stopped 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
Charging is no longer performed and the voltage is discharged through the diode D1 and the resistance component in the circuit. Also, if the cleaner switch 4 is opened before the time T3 has elapsed, the transistor Tr3 will be turned off and the relay RY will be turned off after the time T3 has elapsed, so that the ground circuit for the capacitor C2 will no longer be formed. , the capacitor C2 is also discharged.

The above is the operation when the lamp switch 6 is on, but when this switch is off, the transistor Tr5 is on, so the transistor Tr6
is also off, and power is not supplied to relay RY.
Cleaning is not performed even if cleaner switch 4 is pressed. For this reason, since cleaning is performed only when the lamp switch 6 is turned on and the lighting is on, the cleaning effect can be clearly discerned, and cleaning is not performed during non-lighting when the cleaning effect is difficult to discern. This prevents cleaning fluid 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 6
turns on, transistor Tro1 turns on, and as in the case of FIG. 1, transistors Tr7 and Tr6
Relay RY is driven in synchronization with . However, when the lamp switch 3 is turned off, the transistor Tr50
Since the transistor Tr51 is turned off, even if the cleaner switch 4 is turned on, the transistor Tr51 remains turned on, and cleaning is not performed.

〔Effect of the invention〕

As explained above, this invention has the following advantages: - After a predetermined period of time has elapsed since the variable current cleaning liquid was injected, the cleaning liquid is injected again, so that the cleaning liquid soaks into the dirt after the first injection and removes the dirt. Since the film is softened, dirt is washed away with the next spray of cleaning liquid, eliminating the need to use large amounts of cleaning liquid as in the past.This allows the cleaning liquid tank to be made smaller, giving greater flexibility in tank installation. Since the cleaning performance is improved, it is no longer necessary to optimize the positional relationship between the lamp and the nozzle, and the nozzle mounting has the effect of improving the degree of freedom in positioning.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing one embodiment of this invention, Fig. 2 is a graph showing the charging characteristics of a capacitor, Fig. 3 is a diagram showing the cleaning time, and Fig. 4 shows another embodiment. It is a circuit diagram. 1...Ignition switch, 2...Cleaner motor, 3...Battery, 4...Cleaner switch, 5...Lamp, 6...Fist ombre switch, 7
...Control circuit, 8 fists...Fuse, R1 to R29
...Resistor, Tr1 to Tr7...Fist transistor, C1 to C6...Fist capacitor, D1 to 07-, San〇diode, XC1 to IC4---Comparator,
RY--・Rere O

Claims (1)

[Claims] A lighting device cleaner that sprays a cleaning liquid onto a lighting device installed in an outdoor device to clean the lighting device, characterized by having a means for spraying the cleaning liquid again after a predetermined period of time has elapsed after the first injection of the cleaning liquid. Illuminator cleaner.