JPS6361227B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiper operating device for a vehicle, and particularly to one having an intermittent operating mode, the operating time of which is changed automatically or in conjunction with others.

Visibility while the vehicle is running is affected by the density of rainfall, so by changing the intermittent stop time using a manual switch or changing it depending on the vehicle speed, the wiper can be adjusted to the extent that visibility is not extremely deteriorated. The number of activations has been adjusted.

By the way, the inventor of the present invention has noticed that visibility changes not only depending on the density of rainfall, but also depending on the brightness of the surroundings when driving in the rain.

The present invention was made based on this point of view, and an object of the present invention is to control the intermittent operation of the wiper so as to correspond to changes in visibility caused by surrounding brightness.

In implementing the present invention, means for detecting ambient brightness is used. A conversion element that generates an electrical signal depending on the intensity of light can be used. This conversion element can be used in common with a control device for automatically turning on vehicle headlights, for example. Additionally, by receiving electrical signals from a manual switch that lights up the headlights or sidemarker lights, it is possible to determine the brightness of the surrounding area.

To explain the wiper control device shown in the accompanying drawings showing an embodiment of the present invention, 1 is a lighting switch, 2 is a tail lamp lighting position, and 3 is a stop line lighting position. 4 and 6 are relay coils, and 5 and 7 are their relay contacts. 8 is a tail lamp. 9 is a headlamp.

10 is a transistor for switching, 11 is an insertion resistor, 12 is a resistor for manually setting the intermittent stop time of the intermittent wiper, and 13 is a capacitor for setting the intermittent stop time. 14 is an intermittent wiper relay, 15
16 is a switching transistor, and 17 is a wiper motor, which has a motor 17a and a cam plate switch 17b that moves in conjunction with the motor.

18 is a photodetection element consisting of a CDS cell;
19, 20 are voltage comparators, 21,
22 is a transistor for attracting the relay coils 4 and 6. 23 is an intermittent wiper switch, and 24 is a main switch.

When the switches 23 and 24 are closed, the transistor 16 becomes conductive and energizes the relay coil 14. When the contact 15 closes, the motor 17 operates to move the wiper blade, and during one movement, the cam plate switch 17b and The combination of charging and discharging the resistor and capacitor causes the transistor 16 to shut off and then turn on again after a set period of time, a conventional intermittent operation known in the art.

According to the device of the present invention, in the above circuit, when the lighting switch 1 is in the tail position 2 or the head lighting position 3, the relay coils 4 and 6 are attracted, the relay contacts 5 and 7 are closed, and the tail lamp 8 and the head lamp 9 are turned on. do. At the same time, the transistor 10 becomes conductive and is connected in parallel to the resistor 12, so that the intermittent stop time determined by the resistors 11, 12 and the capacitor 13 is shortened.

Furthermore, when the illuminance outside the vehicle becomes dark, the resistance value of the element 18 increases due to the photodetection element 18, so the comparators 19 and 20 are inverted according to the illuminance outside the vehicle, and the transistors 21 and 22 are made conductive, respectively.
Relay coils 4 and 6 are attracted, and relay contacts 5 and
7 becomes conductive, and lamps 8 and 9 are lit.
At the same time, the transistor 10 becomes conductive, and the resistor 1
Since the resistor 11 is inserted in parallel with 2, the intermittent stop time of the intermittent wiper is shortened.

In this way, the intermittent OFF time during the day at night is about 4
In terms of seconds, this is about 30 to 50% shorter, and visibility can be secured.

In addition to the CDS cell, known photodetecting elements such as photodiodes, solar cells, and phototransistors can be used as the photodetecting elements. When implemented using an analog circuit, the intermittent stop time may be changed by connecting resistors in parallel or by connecting them in series, or by switching the connection of capacitors. Also,
It does not prevent the use of digital computers.

As described above, according to the present invention, by automatically or interlockingly changing the intermittent stop time of wiper operation depending on the surrounding brightness, safe driving can be performed without any troublesome operations.

[Brief explanation of drawings]

The accompanying drawings are electrical wiring diagrams showing embodiments of the present invention. 1... Lighting switch (detection means), 1
1...Resistance for changing intermittent stop time, 12, 13...
Intermittent time setting resistor and capacitor, 14...Relay coil, 15...Relay contact, 16...Transistor, 17...Wiper motor (wiper operating mechanism), 18...Photodetection element (detection means), 23,
24... Intermittent wiper switch main switch (switch means).

Claims (1)

[Claims] 1. Detection means that generates a signal corresponding to the surrounding brightness, switch means for operating the wiper,
A driving signal is generated to intermittently operate the wiper operating mechanism and the wiper operating mechanism by operating the switch means, and the intermittent stop time of the wiper operating mechanism is varied according to the surrounding brightness based on the signal from the detecting means. A wiper operating device for a vehicle, comprising a control device for controlling the wiper.