JPH0148184B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a washer for cleaning the windshield of an automobile, and in particular to an automatic cleaning liquid switching device that can automatically switch between spraying detergent liquid and water cleaning liquid. Relating to a washer device.

(Prior Art) Conventionally, the most commonly known washer is equipped with a single liquid tank, and in order to increase the cleaning ability of this conventional washer,
They used detergent liquid in a liquid tank to be sprayed onto windshields, etc.

However, when only a detergent liquid is used as the washer liquid, the following disadvantages occur.

(1) When the detergent solution dries, it adheres to the glass and car body as dirt, which is unsightly and difficult to remove even when wiped.

(2) Detergent liquid is expensive compared to water.

In order to eliminate the above-mentioned inconveniences, it is preferable to first spray a detergent solution to remove dirt, and then flush the detergent solution containing the dirt with water.

Focusing on this point, it was made in the 1970s.
This is an automobile windshield cleaning liquid injection device described in Publication No. 65139.

The configuration of this conventional device will be explained with reference to FIG. 1. An oil washing liquid tank 1 and a fresh water tank 2 are provided, and pipes 5 and 6 with pumps 3 and 4 interposed between the liquid tanks 1 and 2 are connected to each other. Both pipes 5 and 6 are commonly connected on the discharge side and connected to a nozzle 9, and check valves 7 and 8 are interposed in both pipes 5 and 6, respectively, and both pumps 3 and 4 are driven. A switching device 13 is provided to switch the motors 10 and 11 and connect them to a power source 12.

And when cleaning the car windshield,
The switching device 13 is used to manually switch between injecting one type of oil washing liquid and the other type of injecting clean water.

However, in the case of such conventional devices, it is necessary to switch manually as described above.
It is troublesome for the driver to operate, especially when trying to clean the windshield etc. while driving, and there is a problem that it is difficult to use because it is a heavy psychological burden to operate. was.

In addition, when trying to obtain a high cleaning effect by using as little oil cleaning liquid and fresh water as possible, it is necessary to switch the oil cleaning liquid and clean water at a good time, so the switching operation must be performed while keeping a close eye on the cleaning status each time the washer is used. must be done. For this reason, although such a switching operation is possible when the vehicle is stationary, it is not possible while the vehicle is moving, and the amount of oil washer fluid used cannot be sufficiently reduced. The problem was that it was impossible to achieve this goal.

(Objective of the Invention) The present invention has been made to solve the above-mentioned problems, and its purpose is to first spray detergent liquid by simply turning on the washer switch, and then to An object of the present invention is to provide a washing liquid automatic switching washer device that can automatically switch to water jetting.

(Structure of the Invention) That is, in order to achieve the above-mentioned object, in the first invention, the pump drive motor that drives the separate pumps is provided with a switching means, and in the second invention, the switching means is provided with a switching means. It is equipped with a switching time adjustment circuit for adjusting the detergent liquid injection time, and the third
In the invention, the switching means is provided with a switching setting circuit that switches either one of the pump drive motors so that it can be connected to the power source at all times.

In other words, in the first invention, a detergent liquid tank and a water tank are provided separately on the vehicle body, a pump is provided in each of the two tanks, and the water tank and the water tank are connected to each other via the two pumps. After connecting the cleaning liquid pipe connected to the water pump, the pump drive motor provided in each of the two pumps, and the detergent liquid side pump drive motor to the power supply for a certain period of time, the water side pump drive motor is connected to the power supply for a certain period of time. and switching means for connecting to.

Further, in the second invention, in addition to the constituent features of the first invention, the switching means is provided with a switching time adjustment circuit for adjusting the detergent liquid injection time.

Further, in the third invention, in addition to the constituent features of the first invention, the switching means is provided with a switching setting circuit for switching one of the pump drive motors so that it can be connected to the power source at all times.

The switching means has a washer switch circuit and an automatic switching circuit, and the automatic switching circuit is constituted by an electric circuit such as a timer circuit.

Further, the switching time adjustment circuit and the switching time setting circuit are incorporated in the automatic switching circuit of the switching means.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
In describing the embodiment, a windshield washer device for an automobile will be used as an example.

First, the structure of the embodiment of the first invention shown in FIGS. 2 to 4 will be explained. Reference numeral 20 is a cleaning liquid tank, which is provided in the engine room 22 of the vehicle body 21, as shown in FIG. As shown in FIG. 3, the cleaning liquid tank 20 is divided into a cleaning liquid tank 24 and a water tank 25 by a partition wall 23, and both tanks 24, 25 are divided into a cleaning liquid tank 24 and a water tank 25.
A liquid supply port 26, a water supply port 27 and an opening/closing lid 2 are provided in each of the
8 and 29 are provided.

Reference numerals 30 and 31 are pumps, and both the tanks 2
As shown in FIG. is used for supplying detergent liquid a, and the other pump 31 is used for supplying water b.

34 is a cleaning liquid pipe, which connects both the pumps 3
Both the tanks 24, 25 and the washer nozzle 35 are connected through the third
As shown in the figure, this cleaning liquid pipe 34 includes a detergent liquid suction side pipe 341 that connects the cleaning liquid tank 24 and the pump 30, and a detergent liquid suction side pipe 341 that connects the cleaning liquid tank 24 and the pump 30.
1, and a detergent liquid discharge side pipe 3 connected to one of the pumps 30.
43, a water discharge side pipe 344 connected to the other pump 31, a nozzle connection pipe 345 connected to the nozzle 35, and both discharge side pipes 343, 3.
44 and a one-way check valve 346 connecting the nozzle connecting pipe 345.

Here, the one-way check valve 346 prevents water from flowing to the other pump when one of the pumps 30, 31 is operating.

Reference numerals 36 and 37 are pump drive motors provided in each of the pumps 30 and 31,
As shown in FIG. 3, this pump drive motor 3
6 and 37 are provided integrally with both pumps 30 and 31, and the pumps 30 and 31 are operated by rotational drive of pump drive motors 36 and 37.

Reference numeral 38 is a switching means that automatically switches both the pump drive motors 36 and 37 to connect them to the power source 39. As shown in FIG. and an automatic switching circuit 41.

Here, one of the watch switch circuits 40
is equipped with a power supply 39, an ignition switch 42, and a washer switch 43.
Reference numeral 9 uses a battery installed in the vehicle, and an ignition switch 42 and a washer switch 43 are arranged inside the vehicle.

Further, the other automatic switching circuit 41 has a so-called timer circuit configuration, and has transistors 44 and 45.
and capacitor 46, relays 47, 48, switches 49, 50, and resistors 51, 52, 52a, 53, 5
The driving time of the detergent liquid pump drive motor 36 is determined by the resistance value of the resistor 51 and the capacitance of the capacitor 46.
5 amplifies the current flowing from the transistor 44 to the relay 47, a switch 49 interlocking with the relay 47 switches the energization of the pump drive motors 36 and 37, and a switch 50 interlocking with the relay 48 turns off the current. After the shear switch 43 is turned off, the charged capacitor 46 is discharged to zero. Note that the automatic switching circuit 41 is
As illustrated in FIG.
7 and is connected to the washer switch 43 by a wiring 58.

Next, the effect will be explained.

First, when using the washer with the ignition switch 42 turned on, the washer switch 43 is turned on.

By operating this switch, the current from the power source 39 passes through the resistor 54 to the relay 48 and the resistor 51.
The current flows to the capacitor 46 connected to the base side of the transistor 44 through the switch 50, which is connected to the relay 48, is switched to the OFF side, and the transistors 44 and 45 are turned ON until the capacitor 46 is fully charged. So,
A current flows through the relay 47 that is amplified by the transistor 45, and the switch 49 that operates in conjunction with the relay 47 is activated.
Switching to the ON side, the detergent liquid pump drive motor 36 is driven to rotate.

As the pump drive motor 36 is driven to rotate, the detergent liquid a is sprayed from the washer nozzle 35 for a certain period of time (usually several seconds) determined by the resistor 51 and the capacitor 46.

Then, when the capacitor 46 becomes fully charged,
Current no longer flows through the capacitor 46, and the transistors 44 and 45 are turned off.
Since no current flows through the relay 47, the switch 49 is switched to the OFF side, and the water pump drive motor 37 is driven to rotate.

By the rotational drive of this pump drive motor 37, the water b
is sprayed from the washer nozzle 35.

Next, by spraying water b for a certain period of time, the detergent solution a and dirt will be washed away and the windshield will become clean. When the washer switch 43 is turned off, the pump drive motor 37 will stop and water b will be sprayed. The cleaning is complete.

Furthermore, by turning off the washer switch 43, no current flows to the relay 48 and the switch 50 is switched from the OFF side to the ON side, so the circuit formed by the capacitor 46 and the resistor 53 becomes a closed circuit. The capacitor 46 is discharged and has zero charge, returning to its initial state.

Alternatively, by intermittently operating the washer switch 43, only one of the detergent liquids a can be sprayed continuously.

Furthermore, if an antifreeze solution containing ethylene glycol, which has a cleaning effect, is used as the detergent solution a and the washer switch 43 is operated intermittently as described above, cleaning can be performed with the antifreeze solution even if the water b is frozen. It is something.

Although the embodiment of the first invention has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment. For example, the automatic switching circuit 41 is as follows:
In addition to the embodiments, various types of timer circuits are conceivable; in short, this is a circuit that drives one pump drive motor 36 for a certain period of time, and then automatically switches to drive the other pump drive motor 37. If so, it is included in the first invention.

Further, as a switching operation, the automatic switching circuit 41 of the embodiment
This is a switching operation in which there is a slight blank time in which the pump drive motor 3 is not driven.
6 and 37 may also be driven.

Furthermore, as described in the usage example, the detergent solution a also includes antifreeze solution.

Next, an embodiment of the second invention will be described.

In this second invention, in addition to the first invention, a switching time adjustment circuit 59 is provided in the switching means 38, and in the embodiment, as shown in FIG. 5, the resistance of the automatic switching circuit 41 in the first invention is 51, a variable resistor 60 is used, and by increasing the resistance value of this variable resistor 60, it takes time to fully charge the capacitor 46, and the spraying time of the detergent solution a can be extended. By reducing the resistance value of the variable resistor 60, the spraying time of the detergent liquid a can be conversely shortened.

In other words, it has the function of being able to adjust the spraying time of the detergent solution a to the optimum time depending on the degree of dirt on the glass depending on the region or season.

The knob 61 of the variable resistor 60 may be attached to a box 55 containing the automatic switching circuit 41 as shown in FIG. 6, and as shown in FIG. It may be attached to the operating rod 62 of
If installed in the vehicle, the switching time can be adjusted even during operation.

Note that the other configurations are the same as those of the first invention, so the same reference numerals are given to the drawings, and the description thereof will be omitted here.

Regarding the action, the difference is that before turning on the washer switch 43, the resistance value of the variable resistor 60 is adjusted in advance to the optimum resistance value or the resistance value that is considered to be the optimum value using the knob 61. Since this is the same as the embodiment of the first invention, the explanation will be omitted here.

The embodiments of the second invention have been described above, and as the switching time adjustment circuit 59, a built-in circuit has been shown in which the resistor 51 of the automatic switching circuit 41, which is a timer circuit, is replaced with a variable resistor 60. The capacitor 46 may be a variable capacitor, or it may be a circuit with a separate switching time adjustment circuit added, or the automatic switching circuit and the switching time adjustment circuit may be implemented using completely different circuits equipped with a timer and a changeover switch. In short, any switching means 38 that can adjust the detergent liquid injection time is included in the second invention.

Next, an embodiment of the third invention will be described. In addition to the first invention, this third invention provides a switching means 38
a switching time setting circuit 63 for switching one of the two pump drive motors so that it can be constantly connected to a power source;
In the embodiment, as shown in FIG. 8, a variable resistor 64 similar to the embodiment of the second invention,
A switch 65 turns off the current flowing to the relay 48 and turns off the current flowing to the transistor 44.
and a switch 66.

When one switch 65 is turned on by the switching time setting circuit 63, no current flows through the relay 48, so the switch 50 remains on the ON side, and current flows through the transistor 44, causing the switch 49 to turn ON. If the other switch 66 is turned on, the transistor 4 will be turned on.
Since no current flows through 4, switch 49
It stays on the OFF side, and it is possible to spray only water b.

Since the variable resistor 64 is provided, it goes without saying that the injection time of the detergent solution a can be adjusted steplessly to an appropriate time as in the embodiment of the second invention, and this switching time adjustment function is also effective. A function to spray only one of detergent liquid A or water B has been added, and the range of selection has been expanded depending on the usage conditions when using the washer.

Note that the other configurations are the same as those of the first invention, so the same reference numerals are shown in the drawings, and the explanation will be omitted here.

Regarding the operation, before turning on the washer switch 43, the resistance value of the variable resistor 64 is adjusted in advance using a knob (not shown, but a knob similar to the embodiment of the second invention is provided). The difference is that the setting operation of turning on or turning on one side of the switches 65 and 66 is performed, and after setting, the operation is the same as the embodiment of the first invention and the operation described above, so a description will be given here. Omitted.

The embodiment of the third invention has been described above, and the switching time setting circuit 63 is a circuit that switches so that either one of the pump drive motors can be connected to the power source at all times, as described in the second invention. If so, it is not limited to the examples.

Further, it is effective when an antifreeze solution is used as the detergent solution a and the water b freezes and cleaning is attempted with only the antifreeze solution.

(Effects of the Invention) Therefore, in the washing liquid automatic switching washer device of the present invention, by simply turning on the washer switch, detergent liquid is first sprayed, and then the water spray can be automatically switched to water spray. This has a common effect, and this effect allows windshields and the like to be cleaned cleanly.

In addition to the above-mentioned common effects, the second aspect of the present invention has the advantage that the injection time of the cleaning liquid can be adjusted as appropriate, so that it can be adapted to the degree of dirt on the windshield or the like.

Furthermore, in addition to the above-described common effects and the effects of the second invention, the third invention has an effect that can be applied even when it is desired to spray only one of the detergent liquid and water.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional automobile windshield cleaning liquid injection device, Fig. 2 is a perspective view showing an automobile equipped with an embodiment of the device of the first invention, and Fig. 3A is a diagram showing an embodiment of the device of the first invention. A sectional view showing the cleaning liquid tank and the washer nozzle, FIG. 3B is an enlarged view of part C,
FIG. 4 is a circuit diagram showing the switching means in the embodiment device of the first invention, FIG. 5 is a circuit diagram showing the switching means in the embodiment device of the second invention, and FIGS. 6 and 7 are the circuit diagrams showing the switching means in the embodiment device of the second invention. FIG. 8 is a perspective view showing the adjustment knob in the embodiment device, and FIG. 8 is a circuit diagram showing the switching means in the embodiment device of the third invention. 24...Detergent liquid tank, 25...Water tank, 3
0,31...Pump, a...Detergent liquid, b...Water,
34...Cleaning liquid pipe, 35...Washer nozzle, 36, 37...Pump drive motor, 38...
...Switching means, 39...Power source, 43...Watcher switch, 59...Switching time adjustment circuit, 63...
...Switching time setting circuit.

Claims (1)

[Scope of Claims] 1. A cleaning liquid tank and a water tank that are separately and independently provided on the vehicle body, a pump that is installed on each of the tanks, and a water tank that connects the two tanks and the water tank via the pumps. The connected cleaning liquid pipe and
A pump drive motor provided in each of the two pumps, and a switching means that connects the detergent liquid side pump drive motor to the power source for a certain period of time and then connects the water side pump drive motor to the power source for a certain period of time. A washer device that automatically switches cleaning liquid. 2. A detergent liquid tank and a water tank provided separately on the vehicle body, pumps provided in each of the tanks, and a cleaning liquid pipe that connects both the tanks and the washers via the pumps. and,
a pump drive motor provided in each of the two pumps; a switching means for connecting the detergent liquid side pump drive motor to a power source for a certain period of time and then connecting the water side pump drive motor to a power source for a certain period of time; A washing liquid automatic switching washer device comprising: a switching time adjustment circuit for adjusting a detergent liquid injection time; 3. A detergent liquid tank and a water tank provided separately on the vehicle body, pumps provided in each of the tanks, and a cleaning liquid pipe that connects both the tanks and the washers via the pumps. and,
a pump drive motor provided in each of the two pumps; a switching means for connecting the detergent liquid side pump drive motor to a power source for a certain period of time and then connecting the water side pump drive motor to a power source for a certain period of time; A washing liquid automatic switching washer device comprising: a switching setting circuit that switches either one of the two pump drive motors provided so that it can be connected to a power source at all times.