JPS6113389Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for automobile wipers.

Recently, it has become common to install wipers not only on the front windows of automobiles but also on the rear windows.

The present invention includes a switch that can be selectively operated to select between a low speed position, a high speed position, an intermittent operating position, a washer position, and a stop position, and a control unit for controlling the operation of the front window wiper. , in which the operation of the front window wiper is controlled via the control unit, by selectively switching the switch to the intermittent operating position and the washer position,
The present invention is characterized in that the operation of the rear window wiper is controlled through the control unit.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In the figure, 1 is a wiper control unit (hereinafter simply referred to as unit 1) for controlling the operation of the front window wiper. ], 2 is a wiper control switch (hereinafter simply referred to as switch 2). ], 3, and 4 are motors that drive wipers for the front window and the rear window (hereinafter referred to as front motor 3 and rear motor 4). ]. Now, as shown in the first diagram, when the switch 2 is turned to the intermittent operation position (INT), the voltage of the power supply 7 is applied to the capacitor C ₁ via the terminal B of the unit 1, the relay coil RL ₁ and the resistor R ₁ . to charge.
When the charging potential of this capacitor _C1 reaches a predetermined value, the transistor _Tr2 becomes conductive and the transistor
Tr ₁ becomes conductive. In this way, the relay coil RL ₁ is operated to switch its contacts RL _1a and RL _1b as shown by the dotted line, and the front motor 3 is grounded via the switch 2 and the contact RL _1a , and the front motor 3 rotates. Rear motor 4 has relay coil RL ₂ , terminal R and transistor
Grounded via Tr ₁ . Therefore the relay coil
When RL ₂ is actuated, it is grounded and rotated through its switching contact RL _2a , and each wiper starts moving.
Reference numerals 8 and 9 indicate cam switches provided for the front and rear motors 3 and 4. When the front and rear motors 3 and 4 start rotating, they are switched and connected as shown by the dotted lines, and when each wiper returns to its old position, the cam switches are connected as shown by the solid lines. Become.

The above-mentioned capacitor C ₁ is connected to the transistor Tr ₂ and the resistor _{R 2} from the time when the transistor Tr 1 becomes conductive.
and discharges through the transistor Tr ₁ , and when the base voltage of the transistor Tr ₁ reaches the cut-off voltage, the transistor Tr ₁ becomes non-conductive. The relay coil RL ₁ is thus deactivated, and its contacts RL _1a and
RL _1b returns to the state shown by the solid line, and relay coil RL ₂ also becomes inactive. As a result, when each wiper returns to its old position, the front and rear motors 3 and 4 operate the cam switch 8,
9 returns to the solid line, a closed circuit is formed and the circuit is stopped. In such a situation, the above-mentioned capacitor
When the charging circuit of C ₁ is configured and it is charged and reaches the predetermined charging potential again, the transistor
Tr ₁ is conductive and each wiper blade is driven as described above.

In this way, an intermittent operation is performed in which the wiper blade is not operated during the charging time of the capacitor _C1 .

Next, when the switch 2 is set to the washer position (WAS) as shown in the second diagram, the washer pump motors 5 and 6 rotate simultaneously, and the power supply 7 is applied to the emitter of the transistor Tr ₃ , causing an emitter-base current. flows into the transistor Tr ₃
conducts and instantaneously charges the capacitor _C2 , and its potential increases across the diode _D1 and resistors _R3 and _R4.
is connected to the base of transistor Tr ₁ through Tr 1 to make it conductive. Thus, relay coil RL ₁ and
When RL ₂ is activated, its contacts RL _1a , RL _1b , and RL _2a are switched and connected as shown by dotted lines, and the front and rear motors 3, 4 are connected.
is driven, and the wiper is driven. Next, when the switch 2 is returned to the OFF position, the washer pump motors 5 and 6 are opened and stopped. And the front and rear motors 3 and 4 are connected to capacitor C ₂
Then, when the transistor _Tr1 becomes non-conductive and the cam switches 8 and 9 are closed as shown by solid lines, a closed circuit is formed and the circuit is stopped.

Next, when the switch 2 is set to the high speed position (HIGH) or the low speed position (LOW), only the front motor 3 is connected to the power source 7 and rotates continuously at high speed or low speed, regardless of the unit 1.

In this embodiment, as described above, when the switch 2 is in the high speed position (HIGH) or low speed position (LOW), no power is supplied to the rear motor 4, and only the front motor 3 is supplied with power to perform continuous rotation. height,
Front and rear motors 3 and 4 at intermittent operating position (INT)
At the same time, it was made to perform intermittent rotation. Therefore, the front motor 3 needs to have a large capacity that can withstand continuous operation, but the rear motor 4 only needs to be able to withstand intermittent rotation, so a small one with a small capacity is sufficient. .

The unit 1 is not limited to the one shown in FIG. 1, but may be of the type shown in Japanese Patent Application No. 51-22243, for example.

In this way, according to the present invention, the switch 2 for operating the front window wiper is used to operate the rear window wiper, so compared to a case where a dedicated switch for operating the rear window wiper is provided on the driver's seat. This has the effect that it can be provided at low cost and is easy to operate.

Furthermore, according to the present invention, the rear window wiper is operated only when the switch 2 is switched between the intermittent operation position and the washer position, so the rear window wiper drive motor 4 is designed to withstand continuous operation. It is not necessary to have a relatively large capacity, and a relatively small capacity and small size has the effect of providing sufficient durability.

Furthermore, according to the present invention, the control unit 1 for controlling the operation of the front window wiper is also used as a control unit for controlling the operation of the rear window wiper, which is different from the conventional type in which a control unit is provided for each separately. It has the effect of being able to be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of one embodiment of the present invention, and FIG. 2 is a circuit diagram when the blade control switch is in the washer position. 1... Wiper control unit, 2...
Wiper control switch, 3, 4... motor, 5, 6... washer pump motor.

Claims (1)

[Scope of utility model registration request] It is equipped with a switch that can be operated to selectively change between a low speed position, a high speed position, an intermittent operating position, a washer position, and a stop position, and a control unit for controlling the operation of the front window wiper. The operation of the front window wiper is controlled via the control unit, and the operation of the rear window wiper is controlled via the control unit by selectively switching the switch to the intermittent operating position and the washer position. An automobile wiper control device characterized by: