JPH02220949A - Wiper controller - Google Patents

Abstract

PURPOSE:To make it possible to intermittently operate a rear wiper by installing, between front and rear wiper motors, a counter circuit which receives an autostop signal outputted from a slip ring equipped to a front wiper motor and outputs the signal after dividing it, when a front wiper is in operation. CONSTITUTION:Initially, a front wiper switch 13 is wet in 'LOW' mode, for example, by an operator. In the next step CPU located in a rear wiper motor control circuit 3 when a rear wiper switch 4 is in 'INT' mode. This makes the counter 5 start operation, i.e., the counter 5 counts the frequency of operation of a front wiper 10 by counting the number of pulses of an autostop signal. Then, the CPU outputs a command to the counter 5 when the number counted by the counter 5 has reached the value set beforehand to make the counter 5 output a pulse signal for drive to the next step rear wiper motor 2. This makes a rear wiper 1 operate (once to + fro).

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wiper control device, and particularly to a wiper control device suitable for use in a vehicle equipped with not only a front wiper but also a rear wiper, such as a so-called one-box car. Regarding a control device.

[Conventional technology]

Conventionally, passenger cars and the like have been equipped with a wiper only on the front, and a two-stage "high/low" wiper, or in addition to these wipers, a wiper that operates intermittently (rlNTJ) is often used.

Recently, relatively many one-box cars are equipped with wipers not only on the front but also on the rear. One reason for this is that one-box cars and the like are relatively often used today for delivery of various goods, and such delivery services often require the vehicle to be backed up (backed up). This is thought to be because the need for a rear wiper is high, especially during rainy nights, where the presence or absence of a rear wiper makes a big difference in the ease of checking behind the vehicle. Most rear wipers of this type are controlled separately and independently from the front wiper, and most of them do not have a switching function.

[Problem to be solved by the invention]

As mentioned above, most conventional rear wipers did not have a switching function, so many of them were set to relatively high speeds in preparation for heavy rain, so they were not necessarily useful, especially when The disadvantage was that it was of little use during light rain. Furthermore, since the rear wiper and the front wiper are controlled separately and independently, the switches are often installed in separate locations, which is disadvantageous in that operation is troublesome and time-consuming.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wiper control device capable of overcoming the disadvantages of the prior art and, in particular, operating a rear wiper in conjunction with a front wiper.

[Means for Solving the Problems] The present invention includes a front wiper motor for driving a front wiper and a rear wiper motor for driving a wiper. Then, when the front wiper is activated, a counting circuit is inserted between the front wiper motor and the rear wiper motor, which inputs the auto-stop signal output from the slip ring installed in the front wiper motor and outputs the signal after dividing the frequency by two. ing. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The embodiment shown in FIG. 1 includes a front wiper 10 and a front wiper motor 11 that drives the front wiper 10.
, a rear wiper 1 , and a rear wiper motor 2 for driving the rear wiper 1 .

The front wiper motor 11 is also provided with a front wiper motor control circuit 12 as usual. This front wiper motor control circuit 12 is also provided with a front wiper switch 13 . This front wiper switch 13 is set to "OFF (OFF) J, r high" and "low" as usual.

This is a switch for selecting and setting each mode of rlNT and "washer", and is a switch for selecting and setting each mode of "rlNT" and "washer".
2 is constituted by a normal circuit (not shown) that can correspond to each mode. To explain each mode in detail, the "high" mode is a mode that is set during times of heavy rain, etc., and is a mode in which the front wiper 10 operates at high speed, and the "low" mode is a mode that is set during times of slow or medium rain. This is the mode in which the front wiper 10 is operated at a low speed.9 This is the mode most frequently used. Also, r I NT.

The "Washer" mode operates the front wiper 10 intermittently and is set during drizzling rain, etc., and the "Washer" mode operates a window washer (not shown) and also moves the front wiper several times back and forth. This is the mode in which it moves.

The rear wiper motor 2 is also provided with a rear wiper motor control circuit 3. The rear wiper motor control circuit 3 includes a CPU (not shown) consisting of a microprocessor (not shown), and circuits that can correspond to conventional "high", "low", two-stage, and "washer" modes. This rear wiper motor control circuit 3 is also provided with a rear wiper switch 4. Like the front wiper switch 13 described above, this rear wiper switch 4 is set to OFF (OFF).
) J, r high'', ``low J'', rrN'r, and ``washer'' modes.

Furthermore, in this embodiment, a counter 5 as a counting circuit is interposed between the front wiper motor 11 and the rear wiper motor 2. This counter 5 is configured to operate according to a command from the rear wiper motor control circuit 3 when the setting mode of the rear wiper switch 4 is the rlNTJ mode. A count number setting circuit 6 for setting the count number (frequency division value) of the counter 5 is provided alongside the aforementioned rear wiper motor control circuit 3. The counter 5 inputs an auto-stop signal (outputted as a rectangular wave with a certain period as shown in FIG. 3) output from a slip ring (not shown) installed in the front wiper motor 11 when the front wiper 10 is operated. , the frequency is divided by one according to a preset value and then output. That is, this counter 5 counts the number of pulses of the auto-stop signal, and outputs a pulse once when reaching the set value of the count number setting circuit 6.

Next, the operation of the above embodiment will be explained based on FIG. 2.

First, the front wiper switch 13 is first set to, for example, a "low" mode by the operator. (Step 3101).

Next, a CP (not shown) in the rear wiper motor control circuit 3
In U, it is determined whether the rear wiper switch 4 is in the "rINT" mode (3102).

Then, in the rINTJ mode, a command signal is sent to the counter 5. As a result, the counter 5 starts operating and counts the number of pulses of the auto-stop signal, thereby counting the number of times the front wiper 10 is operated (S103).

Next, the CPU determines whether the count number of the counter 5 has reached a preset value (S104).

If the set value has not been reached, step 51
Return to 02. On the other hand, if the set value has been reached, a command is issued to the counter 5 to output a driving pulse signal to the rear wiper motor 2 at the next stage. This results in
The rear wiper 1 operates (-reciprocates) (3105).

Next, the CPU issues a reset command to the counter 5 to reset the counter 5 (S106). Returning to step 5102, the same control operation is repeated thereafter.

The other modes of the rear wiper 1 (indicated by dotted line arrows in FIG. 1) are the same as those of a normal front wiper.

As explained above, according to this embodiment, when the rear wiper switch 4 is set to rlNT, the mode of the front wiper switch 13 is set to "high", [low J, r
By setting the NTJ or "washer" mode, the number of reciprocating operations of the front wiper 10 can be reduced (for example, once every three times, once every five times, etc.) and the rear wiper 1 can be operated. , the rear wiper 1 can be easily provided with an intermittent function without using a timer or the like, and the rear wiper 1 can be operated in conjunction with the front wiper switch 13 simply by operating the front wiper switch 13, reducing the effort required for operation. It has the advantage that it can be omitted.

The intermittent interval of the rear wiper 1 can be easily changed by externally changing the set value of the counter 5 using the count setting circuit 6. Also, when the front wiper 10 is set to the "washer" mode, the counter It is also possible to prevent the rear wiper 1 from performing unnecessary operations by resetting the number 5 or stopping the counting operation.

[Effects of the Invention] Since the present invention is configured and functions as described above, according to the present invention, when the front wiper is operated, the number of reciprocating movements of the front wiper is reduced by the function of the counting circuit (for example,
The rear wiper can be activated once every 3 times, once every 5 times, etc.), and this allows the rear wiper to operate intermittently without using a timer etc. It is possible to provide a wiper control device that is unprecedented and excellent in that it is possible to operate the rear wiper in conjunction with the operation just by the operation, and the effort required for operation can be omitted.

In addition, in the above embodiment, the case where the CPU external to the counter judges the pulse count number of the counter as a counting circuit was exemplified, but the present invention is not limited to this, and the counting circuit itself has a judgment function. It may be a configuration having the following.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of the embodiment of FIG. 1, and FIG. 3 is a diagram showing an example of an auto-stop signal. 1... Rear wiper, 2... Rear wiper motor, 5... Counter as a counting circuit, 0
...Front wiper, 1...Front wiper motor.

Claims (1)

[Claims] (1) It is equipped with a front wiper motor for driving a front wiper and a rear wiper motor for driving a rear wiper, and when the front wiper is operated, an auto-stop signal output from a slip ring installed on the front wiper motor is input, and after frequency division, A wiper control device characterized in that a counting circuit for outputting output is interposed between the front wiper motor and the rear wiper motor.