JPH0741645Y2 - Washer interlocking wiper drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a washer interlocking wiper driving device that drives a wiper device in conjunction with driving of a washer liquid ejecting device.

(Prior Art) Conventionally, when a washer liquid ejecting device is driven, the wiper device is interlocked with the washer liquid ejecting device in response to an ON operation of the drive switch, whereby the washer ejected on the wind surface is driven. It is configured to wipe off the liquid automatically. Therefore, it is not necessary for the user to operate the wiper device by a separate operation each time the washer fluid ejecting device is driven, and the number of operations is reduced, which is convenient.

(Problems to be solved by the invention) However, in the case of such a conventional configuration, when the washer liquid that remains jetted to the upper part of the wind surface hangs down after the wiper device is stopped, the wiper device is operated again. Therefore, it is necessary to operate the user every time, and the usability is not good.

In this case, when the wiper device is in the interlocked operation,
The washer liquid sprayed on the wind surface may be pushed up to the upper part of the wiping area by the wiping operation of the wiper device and temporarily stay there. Therefore, in this state, even if the continuous operation time of the wiper device is simply extended, the washer liquid staying at the upper part of the wind surface does not hang down in the wiping area, so that the washer liquid can be reliably removed. On the contrary, only the area wiped by the wiper device is dried, and the above-mentioned problem cannot be solved.

The present invention has been made in view of the above circumstances, and its purpose is to interlock with the operation of the washer liquid ejecting device, and after the wiping by the wiper device is stopped, the washer liquid remaining on the upper part of the wind surface hangs down. Even in such a case, the washer liquid can be wiped without performing the drive operation of the wiper device again, so that there is provided a washer interlocking wiper drive device which is convenient for the user.

[Configuration of Device] (Means for Solving the Problem) The washer interlocking wiper drive device of the present invention is a washer switch that drives the washer liquid ejecting device by an on operation, and is interlocked with the washer switch in an on operation state. Driving circuit for driving the wiper device and holding the driving state for a predetermined delay time even after the washer liquid ejecting device is stopped, and a fixed time after the driving of the wiper device by the driving circuit is stopped. Is characterized in that a re-operation circuit is provided for re-driving the wiper device for a predetermined period of time.

(Operation) According to the washer interlocking wiper drive device of the present invention, when the washer liquid ejecting device is driven by the washer switch while the wiper device is stopped, the interlocking operation circuit drives the wiper device accordingly. , The washer fluid sprayed on the window is wiped off. Then, when the washer liquid jetting device is stopped and the wiper device is accordingly stopped, this is detected by the restart circuit and the wiper device is re-driven for a predetermined time after a certain time has elapsed. As a result, even if the washer liquid sprayed and left on the upper part of the window hangs down after the wiper device is stopped, it is automatically wiped off.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 showing the electrical configuration, reference numeral 1 is a washer motor for driving a pump (not shown) constituting the washer liquid ejecting apparatus 2, one terminal of which is connected to a DC power supply line 3 and the other terminal thereof is a washer switch 4 Is grounded through. The DC power supply line 3 is connected to a DC power supply (not shown), for example, a 12-volt on-vehicle battery. A wiper device 5 is composed of a wiper (not shown), a wiper motor 6 for driving the wiper, a fixed position stop switch 7 and the like.
The fixed-position stop switch 7 is configured so that the contact points (c-b) are turned on when the wiper is in the standby position, that is, the fixed position, and the contact points (c-a) are turned on when the wiper is moving from the fixed position. The contact b is the wiper motor 6
Is grounded together with one terminal, and the contact a is connected to the DC power supply line 3. Reference numeral 8a is a relay switch that is switched by energizing the relay 8, and its movable contact c is the wiper motor 6
, The normally open contact a is connected to the DC power supply line 3, and the normally closed contact b is connected to the contact c of the fixed position stop switch 7.

Numeral 9 is a pnp type transistor, the emitter of which is connected to the DC power supply line 3, the base of which is connected to the DC power supply line 3 through the parallel circuit of the resistor 10 and the capacitor 11 and the washer motor 1 and the washer through the resistor 12. It is connected to a common connection point with the switch 4, and the collector is grounded via a reverse current blocking diode 13, a resistor 14 and a capacitor 15 in series. Reference numeral 16 is an npn-type transistor whose emitter is grounded, the base of which is connected to the common connection point between the resistor 14 and the capacitor 15 via the resistor 17 and the resistor 18
The collector is connected to the DC power supply line 3 via the relay 8 and is also grounded via the Zener diode 19 having the illustrated polarity. The capacitor
15 has a small time constant for charging via the resistor 14 and has a large time constant for discharging via the resistors 17 and 18.
The interlocking operation circuit 20 is configured as described above.

A wiper device 5 stop detection pnp type transistor 21 has its emitter connected to the DC power supply line 3, its base connected to the emitter via a resistor 22, and the relay switch 8a connected via a resistor 23. Connected to the movable contact c,
The collector is grounded via resistor 24. Reference numeral 25 is an npn-type transistor whose emitter is grounded, the base of which is connected to the collector of the transistor 9 through resistors 26 and 27 and a diode 28 for preventing backflow in series and is also grounded through a resistor 29. The common connection point of the resistors 26 and 27 is grounded via the capacitor 30. In this case, the charging time constant of the capacitor 30 via the resistor 28 is set small, and the discharging time constant of the capacitor 30 via the resistors 26 and 29 is set larger than that of the capacitor 15. 31 is
npn type transistor whose emitter is transistor 25
Connected to the collector of the transistor, the base of which is connected to the emitter of the transistor through a resistor 32 and the transistor of which the resistor is connected through a resistor 33.
Connected to 21 collectors. 34 is an npn-type transistor for discharging the capacitor 30, the emitter of which is grounded, the collector of which is connected to the common connection point of the resistors 26 and 27 through the resistor 35, and the base of which is grounded through the resistor 36. . The stop detection circuit 37 is configured as described above.

38 is a pnp type transistor for delay operation, the emitter of which is connected to the DC power supply line 3, the base of which is connected to the emitter through a parallel circuit of a resistor 39 and a capacitor 40, and the transistor 31 of which is connected through a resistor 41. It is connected to a collector, and the collector is connected to the base of the transistor 34 via a resistor 42, and these constitute a timer circuit 43.

43 is an npn-type transistor for driving the wiper device 5, the emitter of which is grounded and the collector of which is the transistor 16
Is connected to the collector of the transistor 38, the base is grounded through the resistor 45, and the resistors 46 and 47 are connected in series to the collector of the transistor 38, and the common connection point of the resistors 46 and 47 is connected through the capacitor 48. Grounded. In this case, the charging time constant of the capacitor 48 via the resistor 47 is small, and the discharging time constant of the capacitor 48 via the resistors 46 and 45 is set to obtain a predetermined time. The drive circuit 49 is configured as described above. Further, the stop detection circuit 37, the timer circuit 43, and the drive circuit 49 described above constitute a restart circuit 50.

Next, the operation of this embodiment will be described.

First, when the washer switch 4 is turned on, the washer motor 1 of the washer liquid ejecting device 2 is supplied with power from a power source (not shown) via the DC power supply line 3, whereby the pump is driven and the window washer liquid is ejected onto the window surface. To be done. On the other hand, when the washer switch 4 is turned on, in the interlocking operation circuit 20, the capacitor 11 is started to charge via the resistor 12, and the transistor 9 becomes the capacitor 11
It turns on when the terminal voltage of reaches the base drive voltage.
As a result, the capacitor 15 is rapidly charged through the resistor 14 and the diode 13, and the transistor 16 is charged by the capacitor 15
The base voltage is applied by the terminal voltage of and turns on. As a result, the relay 8 is energized, the contact (ca) of the relay switch 8a is turned on, the wiper motor 6 is energized, and the wiper (not shown) is operated. Therefore, the wiper is started with a delay time after the window washer liquid is ejected, and the washer liquid ejected on the wind surface is wiped off. It should be noted that the capacitor 30 of the stop detection circuit 37 is rapidly charged through the resistor 27 and its terminal voltage reaches the base voltage of the transistor 25 when the transistor 9 is turned on. Since the base voltage of the transistor 21 is cut off and the transistor 21 is turned off, the collector voltage of the transistor 25 is not applied and the collector current does not flow.

Next, when the washer switch 4 is turned off, the washer motor 1 is cut off and the washer liquid jetting device 2 stops the washer liquid jetting. On the other hand, when the washer switch 4 is turned off, in the interlocking operation circuit 20,
When the transistor 9 is turned off by discharging the capacitor 11 through the resistor 10, the transistor 16 is turned off by discharging through the resistors 17 and 18 of the subsequent capacitor 15. As a result, the relay 8 is cut off and the contact (c-b) of the relay switch 8a is turned on. After this, the wiper motor 6
Stops when the wiper returns to the fixed position and the contacts (c-b) of the fixed position stop switch 7 become conductive. Therefore, the wiper device 5 is interlocked with the delay time depending on whether the washer liquid ejecting device is in operation or stopped, and wipes the washer liquid ejected onto the wind surface.

Now, when the above-mentioned transistor 9 is turned off, in the restart circuit 50, the discharge of the capacitor 30 of the stop detection circuit 37 is started. The discharge time constant in this case is the discharge time constant of the capacitor 15 described above. Therefore, the capacitor 30 holds the terminal voltage enough to drive the transistor 25 even after the wiper motor 6 is stopped. On the other hand, when the wiper motor 6 is stopped, that is, between the contacts (c-b) of the relay switch 8a and the fixed position stop switch 7
When both of the contacts (c-b) are turned on, the transistor 21 is turned on by being given a base voltage, and the transistor 25 is turned on by being given a collector voltage. When the transistor 25 is turned on, the base voltage is also applied to the transistor 31 to turn it on. As a result, the capacitor 40
Is started, and when a certain time elapses and the terminal voltage reaches the base voltage, the transistor 38 is turned on. As a result, the capacitor 48 is rapidly charged, and the terminal voltage thereof turns on the transistor 44 to energize the relay 8. Therefore, the contact (c-
The period a) is turned on again, the wiper motor 6 is energized in the same manner as described above, and the wiper device 5 is operated. At this time, since the transistor 34 is turned on at the same time as the transistor 38 is turned on, the charge of the capacitor 30 is rapidly discharged through the resistor 35 and the transistor 34, and the transistor 25
Turn off. As a result, the transistor 31 is turned off and the charging of the capacitor 40 is interrupted. As a result, the capacitor
The charge of 48 is discharged through the resistors 46 and 45,
The transistor 44 turns off after a predetermined time elapses until the terminal voltage thereof drops below the base voltage of the transistor 44. Then, by turning off the transistor 44, the relay 8
When the wiper returns to the home position, the wiper motor 6 is cut off and the wiper device 5 stops.

As described above, in the wiper device 5, when the operation by the interlocking circuit 20 is stopped, this is detected by the stop detection circuit 37 in the re-operation circuit 50, and after a certain time has elapsed by the timer circuit 43, the drive circuit 49. Because it is re-driven for a predetermined time by the interlocking circuit 20, the washer liquid staying at the upper part of the wiping area when the wiper is operated by the interlocking circuit 20 automatically wipes down when the wiper liquid hangs down after the wiper is stopped. In contrast, the user does not need to drive and operate the wiper device one by one, which improves usability.

In the above embodiment, each circuit of the re-operation circuit 50 is configured by using individual elements such as a transistor, a capacitor and a resistor, but not limited to this, for example, a combination of a logic circuit and a timer circuit by a digital circuit. Or the wiper device 5 may be controlled by a program using a microcomputer, and various modifications may be made without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the washer interlocking wiper drive device of the present invention, when the wiper device is stopped,
When the washer liquid ejecting device is operated by the washer switch, the interlocking operation circuit drives the wiper device for a predetermined time to wipe the washer liquid ejected to the window according to the ON operation of the washer switch, and the washer switch stops. When the driving of the wiper device by the interlocking operation circuit is stopped in response to this, the restart circuit detects this and restarts the wiper device for a predetermined time after a certain period of time has passed. Even if the washer liquid remaining on the upper part of the window after the wiper device stops dripping down, unlike the conventional method, the washer liquid will be automatically wiped without the user having to drive the wiper device again. It has an excellent effect of improving usability for the user.

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing an embodiment of the present invention. In the drawings, 1 is a washer motor, 2 is a washer liquid ejecting device, 4 is a washer switch, 5 is a wiper device, 6 is a wiper motor, 7 is a fixed position stop switch, 8 is a relay,
8a is a relay switch, 20 is an interlocking operation circuit, 37 is a stop detection circuit, 43 is a timer circuit, 44 is a drive circuit, and 50 is a restart circuit.

Claims (1)

[Scope of utility model registration request] 1. A washer switch for driving a washer liquid ejecting device by an on operation, and a wiper device which is interlocked with the washer switch when the washer switch is in an on operation state and the driving state of the washer liquid ejecting device is stopped. An interlocking operation circuit that holds a predetermined delay time afterwards, and a re-operation circuit that re-drives the wiper device for a predetermined time when a certain time elapses after the driving of the wiper device by the interlocking operation circuit is stopped. A washer interlocking wiper device comprising: