JPH035489Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in a power supply circuit to a washer motor for squirting washer fluid onto the glass surface of a vehicle.

(Prior Art) Conventionally, as a power supply circuit for this type of washer motor, as shown in, for example, Japanese Utility Model Application Publication No. 51-111634, a washer motor for spouting out washer fluid and a washer motor for operating the washer motor have been conventionally used. It is well known that the washer motor is equipped with a shift switch and is operated by directly supplying power from a battery power source to the washer motor by opening and closing the switch.

By the way, if a battery power source is directly connected to the washer motor, the washer motor will operate even when the engine is stopped, and the battery voltage will be constantly applied to the washer motor, causing corrosion of the motor terminals due to electrolysis caused by the washer fluid. Usually, a circuit is configured to supply power to the washer motor via the ignition key switch for engine operation, and the ignition key switch is used for engine operation.
The washer motor can only be operated when turned ON.

(Problems to be Solved by the Invention) However, in this case, since the current from the power source flows directly to the washer motor through the ignition key switch, it is necessary to increase the power capacity of the ignition key switch. Therefore, in order to avoid an increase in the power capacity of the ignition key switch, an ignition relay that is turned on when the ignition key switch is turned on is installed in the power supply circuit to the washer motor. The ignition relay is activated to supply power to the washer motor only when the washer motor is turned on, but this requires the addition of a dedicated ignition relay for the washer motor, leading to increased costs. .

The present invention was developed in view of the above points, and its purpose is to effectively utilize the forward and reverse rotation relays of the rise-up wiper motor that raises the wiper from the storage position to the wiping position for wiping operation. By making this forward rotation relay also serve as a wash motor relay and controlling both of the above relays organically, power can be supplied directly from the on-board battery to the wash motor without adding an ignition relay specifically for the wash motor. The purpose of the present invention is to reduce the power supply capacity of the ignition key switch.

(Means for Solving the Problems) In order to achieve the above object, the solution of the present invention is to supply power directly from the on-board battery to the forward relay switch for wiping the wiper and the reverse relay switch for retracting the wiper. It has a rise-up wiper motor connected to it and a washer motor connected to a washer switch. Furthermore, power supply means is provided for connecting the washer motor to the forward rotation relay switch, and for controlling the forward rotation relay switch to an ON conductive state when the washer switch is in the closed state to supply power to the washer motor. be.

(Function) According to the present invention, with the above configuration, the washer motor is connected to the forward rotation relay switch that rotates the rise-up wiper motor in the forward direction in order to raise the wiper from the storage position and perform the wiping operation. When the switch is closed, the above relay switch for forward rotation is activated by the power supply means.
Since it is controlled to be in the ON conduction state, when the washer switch is closed, power is supplied from the on-vehicle battery to the washer motor via the forward rotation relay switch. This allows power to be supplied to the washer motor from the battery without requiring an ignition relay, and
This means that the power capacity of the ignition key switch can be reduced.

Furthermore, when retracting the wiper by turning on the reverse relay switch and reversing the rise-up wiper motor, the power from the battery will not flow to the washer motor even if the washer switch is turned on. However, there is no need to squirt out washer fluid when the wiper is retracted, so this is not a major inconvenience.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 shows the circuit configuration of a power supply circuit for a washer motor according to an embodiment of the present invention, in which 1 is a rise-up wiper motor capable of forward and reverse rotation for driving an automobile wiper (not shown); When the motor 1 rotates in the forward direction, the wiper is moved from its storage position onto the windshield surface of the automobile to wipe away rainwater, mud, etc. adhering to the windshield surface, while when the motor 1 rotates in the reverse direction, the wiper on the glass surface is moved to the storage position. It is meant to be moved. Motor 1 for the above wiper
The wiper relay 2 is installed on the vehicle battery (not shown).
connected via. Wipe relay 2 above
is a forward rotation relay 5 consisting of a forward rotation relay switch 3 and its relay coil 4 for wiper wiping.
The forward rotation relay switch 3 consists of a reverse rotation relay switch 4 for storing the wiper and a reverse rotation relay 8 consisting of its relay coil 7. The movable contact 3a is connected to one normal rotation input terminal of the wiper motor 1, the open contact 3b is connected to the battery, and the closed contact 3c is grounded. On the other hand, like the forward rotation relay switch 3, the reverse rotation relay switch 6 has a movable contact 6a and two fixed contacts, an opening contact 6b and a closing contact 6c. It is connected to the other reverse input terminal, the open contact 6b is connected to the battery, and the closed contact 6c is grounded, so that power is directly supplied to the wiper motor 1 from the vehicle battery via the relays 5 and 8. being done.

Further, 9 is a washer motor for squirting the washer liquid onto the windshield surface of the automobile. One terminal of the washer motor 9 is connected to the movable contact 3a of the relay switch 3 in the forward rotation relay 5, and the other terminal is connected to the movable contact 3a of the relay switch 3 in the forward rotation relay 5. It is grounded via a watch switch 10.

Reference numeral 11 denotes a control as a power supply means for controlling the relay switches 3 and 6 of the forward rotation and reverse rotation relays 5 and 8 to ON and OFF to control the power supply from the vehicle battery to the wiper motor 1 and the washer motor 9. The control unit 11 controls the wiper operation mode.
Output transistors 12a, 1 for forward and reverse rotations which are turned ON and OFF by signals from a wiper switch (not shown) for switching to OFF, INT (intermittent operation), LOW and HIGH modes.
An ignition key switch is connected to each transistor 12a, 12b via the electromagnetic relay coils 4, 7 of the forward rotation relay 5 and reverse rotation relay 8, respectively. The control unit 11 is also connected to the watch switch 10, and when the watch switch 10 is closed, the close signal turns on the forward rotation transistor 12a, thereby controlling the forward rotation. The relay switch 3 is controlled to be ON and conductive to supply power to the washer motor 9.

Next, the operation of the above embodiment will be explained with reference to FIGS. 2 and 3.

When the ignition key switch is in the OFF state, no current flows through the relay coils 4 and 7 of the forward and reverse relays 5 and 8, so the movable contacts 3a and 6a of the relay switches 3 and 6 are both closed. It is connected to the closing contacts 3c and 6c on the ground side, and the second
As shown in FIG. 3 and FIG. 3, even if the washer switch 10 is turned on, power is not supplied to the wiper motor 1 and the washer motor 9, and the wiper motor 1 and the washer motor 9 remain in a stopped state.

Also, wiper switch OFF mode and
If the ignition key switch is turned ON while the wiper motor 1 is stopped due to switching to INT mode, when the washer switch 10 is turned ON as shown in Fig. 2, Accordingly, under the control of the control unit 11, both forward rotation relays 5 and reverse rotation relays 5 and 8 are activated.
When the relay switches 3 and 6 are turned ON, the movable contacts 3a and 6a of the relay switches 3 and 6 are switched to the open contacts 3b and 6b, and the washer motor 9 is rotated, thereby causing the washer liquid to be squirted onto the windshield surface of the automobile. However, the wiper motor 1 does not rotate because the same polarity power from the battery is applied to both terminals thereof. Then, after a time T of several seconds has elapsed, the reversing transistor 12b of the control unit 11 is turned OFF, and the relay switch 6 of the reversing relay 8 is turned OFF, thereby causing the wiper motor 1 to move in the direction of the solid arrow. A current for forward rotation flows, causing the motor 1 to rotate forward, causing the wiper to perform a glass surface wiping motion. In addition, this wiper motor 1
is rotating forward, press the watch switch 10.
When the washer motor 9 is turned OFF, the rotation of the washer motor 9 immediately stops, but after a time T', which is enough for the wiper to wipe the glass surface two or three times, the forward rotation transistor 12a of the control unit 11 is turned OFF. Then, the relay switch 3 of the forward rotation relay 5 is turned off, and the rotation of the wiper motor 1 is stopped.

On the other hand, set the wiper switch to INT, LOW or
By switching to HIGH mode, wiper motor 1
If the ignition key switch is turned ON while the wiper switch is in operation, as shown in Fig. 3, only the forward rotation relay 5 is activated by the wiper switch operation, and the relay switch 3 is turned ON.
Since the movable contact 3a of the relay switch 6 of the reversing relay 8 is connected to the closing contact 6c, the wiper motor 1 is activated at the same time as the ignition key switch is turned on. Rotate forward. In addition, in this state, the forward rotation relay switch 3 is turned on, so as soon as the washer switch 10 is turned on, the washer motor 9 also rotates. This allows the washer liquid to be jetted onto the window glass surface while the wiper is being operated. Thereafter, when the washer switch 10 is turned off, the operation of the washer motor 9 is stopped accordingly.

Finally, when storing the wiper, when the wiper switch is switched to the OFF position, the control unit 11 turns off the forward rotation relay 5.
When the relay switch 3 is activated, the movable contact 3a of the relay switch 3 is connected to the closing contact 3c, and the reversing relay 8 is activated and the movable contact 6a of the relay switch 6 is switched to the closing contact 6c. , 6 causes current to flow through the wiper motor 1 in the direction of the dashed arrow, causing the motor 1 to rotate in the reverse direction, whereby the wiper is stored in the retracted position.

Therefore, in the above embodiment, the forward rotation relay switch 3 for wiping the glass surface and the reverse rotation relay switch 6 for storing the wiper control the wiper motor 1 which operates only when the ignition key switch is in the ON state. The washer motor 9 is connected to the forward rotation relay switch 3, and when the washer switch 6 is turned on, the forward rotation relay switch 3 is turned on under the control of the control unit 11 and power is supplied to the washer motor 9. The forward rotation relay switch 3 can also be used as a relay for the washer motor 9, so power can be directly supplied to the washer motor 9 from the battery without the need to separately add an ignition relay dedicated to the washer motor 9, and the ignition key can also be used as a relay for the washer motor 9. The power supply capacity of the switch can be reduced.

(Effects of the invention) As described above, according to the invention, the forward rotation and reverse rotation relay switches of the rise-up wiper motor are used, the washer motor is connected to the forward rotation relay switch, and the washer switch is closed. By supplying power to the washer motor through the forward rotation relay switch mentioned above when the wiper is in the normal rotation state, the forward rotation relay switch of the rise-up wiper motor can also be used as a relay switch for the washer motor, and an ignition relay can be added separately. Power can be directly supplied to the washer motor from the battery without having to do so, and the power capacity of the ignition key switch can also be reduced, thereby reducing the cost of the washer motor actuating device.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an operation control circuit diagram of a wiper motor and a washer motor, and FIGS. key switch and wiper switch
It is an explanatory diagram of operation when ON and OFF operations are performed. 1... Wiper motor, 3... Forward rotation relay switch, 4... Forward rotation relay coil, 5... Forward rotation relay, 6... Reverse rotation relay switch, 7...
Reversing relay coil, 8... Reversing relay, 9...
. . . Washer motor, 10 . . . Washer switch, 11 . . . Control unit.

Claims (1)

[Scope of utility model registration request] A rise-up wiper motor is supplied with power directly from an on-board battery and connected to a forward rotation relay switch for wiping and a reverse rotation relay switch for storing the wiper, and a washer motor is connected to a washer switch. A washer motor characterized in that it is provided with a power supply means that is connected to the forward rotation relay switch and controls the forward rotation relay switch to an ON conductive state to supply power to the washer motor when the washer switch is in a closed state. power supply circuit to.