JPH0341966Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an intermittent wiper device having an interval operation function.

[Technical background of the invention and its problems]

Generally, during light rain or at the beginning of rain, fewer raindrops adhere to the windshield, so it is desirable to operate the wiper at intervals.
An example of an intermittent wiper device having such an interval operation function is shown in FIG.

In FIG. 2, A is the driver's cab, B is the engine room, and P is the dash panel.

In the driver's cab A, 1 is a steering column, and a steering wheel 2 and levers 3 and 4 are attached to this steering column 1. A wiper switch 5 is provided within the steering column 1. This wiper switch 5 is
Off position OFF, interval position
It has INT, low speed position Lo, and high speed position Hi, and terminals ACC, INT, S, Hi, Lo, and E are set according to the settings for each position based on the operation of lever 4.
is electrically conductive as shown by the solid line in the figure. That is, when the interval position INT is set, conduction is established between the terminals S and Lo and between the terminals INT and E, respectively. In the driver's cab A, 6 is a fuse, 7 is an ignition switch, and 8 is an intermediate connector.

On the other hand, in the engine room B, 10 is a battery power supply, 20 is a wiper motor, and 30 is an intermittent unit. The wiper motor 20 consists of a motor 21 and a wiper position detection switch 22. The intermittent unit 30 includes a main circuit 31, a main circuit 3
The relay coil 33 includes a transistor 32 that responds to the output of the transistor 32, a relay coil 33 in which a conduction path is formed between the collector and emitter of the transistor 32, and a bidirectional relay contact 33a.

Then, the wiper switch 5 of the steering column 1 and the engine compartment B are connected via the intermediate connector 8.
Wiring connections are made to a battery power supply 10, a wiper motor 20, and an intermittent unit 30. Furthermore, in the engine room B, the wiper motor 2
0 and the intermittent unit 30 are connected by wiring.

Therefore, when the ignition switch 7 is turned on and the wiper switch 5 is set to the low speed position Lo, the current from the battery power supply 10 flows between the terminals ACC and Lo of the wiper switch 5 to the low speed terminal Lo of the motor 21 of the wiper motor 20. The motor 21 rotates at low speed. As a result, the wiper blade reciprocates at a low speed to remove raindrops from the window. In this case, when the wiper blade returns to the standard position, switch 22 is turned on as shown in the figure.
One contact of the switch 22 is closed, and when the wiper blade leaves the reference position, the other contact of the switch 22 is closed.

However, wiper switch 5 is set to off position.
When set to OFF, direct power supply from the wiper switch 5 to the motor 21 is stopped. However, if the wiper blade has not returned to its standard position,
The other contact of the switch 22 is closed, so the current from the battery power supply 10 flows between the other contact of the switch 22, the normally closed side of the relay contact 33a in the intermittent unit 30, and the terminals S and Lo of the wiper switch 5. The signal flows through the motor 21 to the low speed terminal Lo, and the motor 21 continues to rotate at a low speed. Then, when the wiper blade returns to the reference position, the other contact of the switch 22 is opened (one contact is closed), and the power supply to the motor 21 is stopped.

Also, set wiper switch 5 to high-speed position Hi.
When set to , the motor 21 rotates at high speed and the wiper blade reciprocates at high speed.

Further, when the wiper switch 5 is set to the interval position INT, the current from the battery power supply 10 flows through the main circuit 31 in the intermittent unit 30 through the terminals INT and E of the wiper switch 5, and the main circuit 31 is operated. When the main circuit 31 operates, the transistor 32 is turned on at regular intervals. When the transistor 32 is turned on, current flows through the relay coil 33 and the relay contact 33a is activated. In this way, the current from the battery power supply 10 flows through the normally open side of the relay contact 33a and between the terminals S and Lo of the wiper switch 5 to the low speed terminal Lo of the motor 21, causing the motor 21 to rotate at a low speed.
In other words, the wiper blade moves forward at a low speed.

When the transistor 32 is turned off, the operation of the relay coil 33 is stopped, the relay contact 33a is restored, and the supply of electricity to the motor 21 via its normally open side is stopped. However, when the wiper blade leaves the reference position, the other contact of the switch 22 closes, so the current from the battery power supply 10 is transferred to the switch 22.
The current flows to the low speed terminal of the motor 21 through the other contact of the relay contact 33a, the normally closed side of the relay contact 33a, and the terminals S and Lo of the wiper switch 5, and the motor 21 continues to rotate at a low speed. Then, when the wiper blade returns to the reference position, the other contact of the switch 22 is opened (one contact is closed), and the power supply to the motor 21 is stopped.

That is, each time the transistor 32 is turned on, the wiper blade moves back and forth once at a low speed.

Incidentally, in such an intermittent wiper device, it is desirable to have as few vehicle body wirings (harnesses) as possible from the viewpoint of cost and workability.

Therefore, as shown in Fig. 3, the intermittent unit 3
0 is incorporated into the steering column 1, and the wiring connection between the intermittent unit 30 and the wiper switch 5 is processed within the steering column 1, thereby reducing the number of vehicle body wirings.

However, in this case, the switching sound of the relay contact 33a of the intermittent unit 30 reaches the driver's ears.
There is a problem in that it makes the driver feel uncomfortable.

[Purpose of invention]

This idea was made in view of the above circumstances, and its purpose is to reduce the number of car body wiring, thereby reducing costs and improving workability. To provide an intermittent wiper device which is highly practical and can prevent the switch sound of an intermittent unit from reaching the driver's ears, thereby causing no discomfort to the driver.

[Summary of the idea]

This invention consists of a wiper motor, a wiper switch that has an interval operation position and forms a current supply path to the wiper motor, an electronic circuit section, and a switch section, and operates when the wiper switch is set to the interval operation position and connects the wiper motor to the wiper motor. In an intermittent wiper device equipped with an intermittent unit that turns energization on and off, the wiper switch and the electronic circuit section of the intermittent unit are provided in the steering column inside the driver's cab, and the switch section of the intermittent unit is provided inside the wiper motor outside the driver's cab. It was established.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. However, in the drawings, the same parts as in FIGS. 2 and 3 are given the same reference numerals, and detailed explanation thereof will be omitted.

As shown in FIG. 1, an electronic circuit section for a wiper switch 5 and an intermittent unit 30 is provided in a steering column 1 in a driver's cab A, and wiring connections between the electronic circuit section and the wiper switch 5 are processed within the steering column 1. do. The electronic circuit section referred to here is the main circuit 31 and the transistor 32.
On the other hand, a wiper motor 20 is provided in the engine room B. The switch section of the intermittent unit 30 is built into the wiper motor 20. The switch section referred to here includes the relay coil 33 and relay contacts 33.
It is a.

Next, the operation in the above configuration will be explained.

When the wiper switch 5 is set to the low speed position Lo when the ignition switch 7 is on, the current from the battery power supply 10 flows through the terminals ACC and Lo of the wiper switch 5 to the low speed terminal Lo of the motor 21 of the wiper motor 20.
1 rotates at low speed. As a result, the wiper blade reciprocates at a low speed to remove raindrops from the window. In this case, when the wiper blade returns to the reference position, one contact of the switch 22 closes, and when the wiper blade leaves the reference position, the switch 22 closes.
The other contact of 2 is closed.

However, wiper switch 5 is set to off position.
When set to OFF, direct power supply from the wiper switch 5 to the motor 21 is stopped. However, if the wiper blade has not returned to its standard position,
The other contact of the switch 22 is closed, and therefore the current from the battery power supply 10 flows between the other contact of the switch 22, the normally closed side of the relay contact 33a provided on the wiper motor 20, and the terminals S and Lo of the wiper switch 5. The current flows to the low speed terminal Lo of the motor 21 through the motor 21, and the motor 21 continues to rotate at a low speed. Then, when the wiper blade returns to the reference position, the other contact of the switch 22 is opened (one contact is closed), and the power supply to the motor 21 is stopped.

Also, set wiper switch 5 to high-speed position Hi.
When set to , the motor 21 rotates at high speed and the wiper blade reciprocates at high speed.

Furthermore, when the wiper switch 5 is set to the interval position INT, the current from the battery power supply 10 flows to the main circuit 31 of the intermittent unit 30 provided in the steering column 1 via terminals INT and E of the wiper switch 5, and the main circuit 31 works. When the main circuit 31 operates, the transistor 32 is turned on at regular intervals. When the transistor 32 is turned on, current flows through the relay coil 33 provided in the wiper motor 20, and the relay contact 33a
is activated. In this way, the current from the battery power supply 10 flows through the normally open side of the relay contact 33a and between the terminals S and Lo of the wiper switch 5 to the low speed terminal Lo of the motor 21, causing the motor 21 to rotate at a low speed. In other words, the wiper blade moves forward at a low speed.

When the transistor 32 is turned off, the operation of the relay coil 33 is stopped, the relay contact 33a is restored, and the supply of electricity to the motor 21 via its normally open side is stopped. However, when the wiper blade leaves the reference position, the other contact of the switch 22 closes, so the current from the battery power supply 10 is transferred to the switch 22.
The current flows to the low speed terminal of the motor 21 through the other contact of the relay contact 33a, the normally closed side of the relay contact 33a, and the terminals S and Lo of the wiper switch 5, and the motor 21 continues to rotate at a low speed. Then, when the wiper blade returns to the standard position, the other contact of the switch 22 is opened (one contact is closed), and the power supply to the motor 21 is stopped.

That is, each time the transistor 32 is turned on, the wiper blade moves back and forth once at a low speed.

In this way, the electronic circuit section of the intermittent unit 30 is built into the steering column 1, and the wiring connection between the electronic circuit section and the wiper switch 5 is handled within the steering column 1, thereby reducing the number of vehicle body wirings. It is possible to reduce costs and improve workability. Moreover, since the switch part of the intermittent unit 30 is built into the wiper motor 20 on the engine room B side, the relay contact 33a
The switching sound will not reach the driver's ears,
Therefore, it does not cause discomfort to the driver.

It should be noted that this invention is not limited to the above-mentioned embodiments, and various modifications can be made without changing the gist.

[Effect of idea]

As mentioned above, this invention makes it possible to reduce the number of car body wirings, thereby reducing costs and improving work efficiency.Furthermore, the switching sound of the intermittent unit can be heard by the driver. This makes it possible to provide a highly practical intermittent wiper device that does not cause discomfort to the driver.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a circuit configuration of an embodiment of this invention, and FIGS. 2 and 3 are diagrams each showing a circuit configuration of a conventional intermittent wiper device. 1... Steering column, 5... Wiper switch, 10... Battery power supply, 20... Wiper motor, 30... Intermittent unit, 31... Main circuit (electronic circuit section), 32... NPN type transistor (electronic circuit section) , 33... Relay coil (switch part), 33a... Relay contact (switch part).

Claims (1)

[Scope of utility model registration request] The wiper motor is composed of a wiper motor, a wiper switch having an interval operation position and forming an energization path to the wiper motor, an electronic circuit section, and a switch section, and operates when the wiper switch is set to the interval operation position to turn on the energization to the wiper motor. An intermittent wiper that turns off the wiper, the wiper switch and an electronic circuit section of the intermittent unit being provided in a steering column in a driver's cab, and a switch portion of the intermittent unit being provided inside the wiper motor outside the driver's cab. Device.