JPH09104324A - Wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop in a containing position after a wiper is continuously operated to a given stop position by providing a transistor for holding a relay connected to a rise up relay and holding ON of a rise up relay even after a transistor for detecting an ignition terminal is turned OFF. SOLUTION: When a wiper blade 10 wipes a surface to be wiped at intervals of an intermittent rest time, when an ignition switch 21 is switched to OFF with a wiper switch 2 situated in an intermittent position, a circuit in which the wiper switch 2 is switched from an intermittent position to a stop position is formed. Thereby, a wiper motor 4 has an output shaft 4c continued to run forward until the output shaft 4c does not stop rotation and the wiper plate 10 is moved to a lower reversing position B. When the wiper plate 10 reaches the lower reversing position B, the output shaft 4c of the wiper motor 4 is reversed and at a point of time when the wiper plate 10 reaches a containing position C in a level lower than the lower reversing position, the output shaft 4c of the wiper motor 4 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device used to wipe a wiping surface by operating a wiper, and more particularly to a wiper which keeps operating the wiper to a predetermined stop position even when a switch is turned off. Regarding the device.

[0002]

2. Description of the Related Art As a wiper device which continues to operate a wiper to a predetermined stop position even when a switch is turned off, for example, a device disclosed in Japanese Utility Model Laid-Open No. 55-48541 is known.

In the wiper device disclosed in the above publication, when the wiper switch is turned off while the wiper is operating,
Current is supplied to the wiper motor until the wiper comes to the fixed position, and when the wiper comes to the fixed position, the current supply to the wiper motor is stopped and the wiper is stopped at the predetermined position.

[0004]

However, in the conventional wiper device as described above, since the wiper motor is directly connected to the power source through the ignition switch, when the vehicle is parked during a rain, the wiper stops at a predetermined stop. If the ignition switch is turned off when not in the position, the wiper motor will not be supplied with current from the power supply.
The wiper will stop on the wiping surface without permission, and if the wiper is parked while it is stopped on the wiping surface, the ignition switch will be turned off when the vehicle starts after that, even though the wiper switch is switched off. At the same time when the switch is turned on, the wiper will operate until it reaches the stop position, so it is good to park in the garage in the case of rain and then start in the same time as rain, but park in the garage in the case of rain. Therefore, if you start the car when it is sunny, the wiper will operate unnecessarily, and you may wipe the wiper dry to contaminate the surface to be wiped.To avoid this, the ignition switch Before switching off, switch off the wiper switch, confirm that the wiper has stopped at the specified stop position, and then switch off the ignition switch. There is a problem that has been accompanied by a complicated operation that, it has been a problem to solve the above problems.

[0005]

It is an object of the present invention to provide a wiper device according to the present invention, even if the ignition switch is turned off while the wiper is operating and the voltage of the power source is not applied to the ignition terminal.
For the purpose of providing a wiper device capable of stopping a wiper at a predetermined position when not in use, without stopping the wiper on a wiping surface, continuously operating to a predetermined stop position, and then stopping at a storage position. There is.

[0006]

Configuration of the Invention

[0007]

According to a first aspect of the present invention, there is provided a wiper device including a power source, an ignition terminal connected to an ignition switch, a wiper switch capable of switching between a stop position and an intermittent position, and a first wiper switch. Brush terminal,
A second brush terminal is provided, and the wiper blade is positively rotated by a forward current supply to the first and second brush terminals to wipe the wiper blade between the upper reversal position and the lower reversal position on the wiping surface. On the other hand, when the wiper blade is in the lower reversal position, it reversely rotates due to reverse current supply to the first and second brush terminals, and the output shaft moves the wiper blade to the storage position below the lower reversal position. A wiper motor, a movable contact coupled to the output shaft of the wiper motor and electrically connected to the wiper switch, a second contact connected to the power source, and a first contact grounded, A movable contact is connected to the first contact when the blade is not in the lower reversal position, and a movable contact is connected to the second contact when the wiper blade is in the lower reversal position. , An intermittent drive signal generation circuit that generates an intermittent drive signal when turned on, and an intermittent relay that is connected to the intermittent drive signal generation circuit and that is intermittently turned on by a drive signal generated through the intermittent pause time And an ignition switch connected to the ignition terminal, the ignition switch is in the ON state, and the wiper switch is in the intermittent position to turn on the intermittent drive signal generating circuit and turn on the rise-up relay. And a first brush terminal and a second brush terminal of the wiper motor, which are connected to the ignition terminal detecting transistor and correspond to the switching position of the wiper fixed position stop switch.
Rise-up relay that switches the current direction of the power supply supplied to the brush terminal of, and a relay-holding transistor that is connected to the rise-up relay and holds the rise-up relay on even after the ignition terminal detection transistor is turned off. The feature is that it has a structure.

In the wiper device according to the second aspect of the present invention, the power source, the ignition terminal connected to the ignition switch, the stop position and the intermittent position can be switched, and when the intermittent position is switched, the wiper device is connected. A wiper switch having first and second switch terminals and third and fourth switch terminals, and third and fourth switch terminals connected when switched to a stop position, a first brush terminal, and a wiper switch A second brush terminal connected to the fourth switch terminal of the wiper blade, and the wiper blade is rotated forward by positive current supply to the first and second brush terminals to move the wiper blade to the upper reversal position on the wiping surface. And the lower reversal position, the wiper blade is reversely rotated by the reverse current supply to the first and second brush terminals when the wiper blade is in the lower reversal position. A wiper motor having an output shaft for moving the wiper blade to a storage position below the lower reversal position, and a movable contact coupled to the output shaft of the wiper motor and connected to a first relay normally closed contact provided in the intermittent relay. And a second contact connected to the power supply and a first contact grounded, the movable contact is connected to the first contact when the wiper blade is not in the lower reversal position, and the wiper blade is in the lower reversal position. The wiper fixed position stop switch, the movable contact of which is connected to the second contact, an intermittent drive signal generation circuit which generates an intermittent drive signal when turned on, and one end of which is connected to the power supply and the other end of which is intermittent. A first relay coil connected to the drive signal generation circuit, a first relay movable contact connected to the third switch terminal of the wiper switch, and a wiper fixed position stop switch A first relay normally closed contact which is connected to the contacts and the intermittent drive signal generating circuit,
An intermittent relay having a grounded first relay normally open contact, a base connected to an ignition terminal, a collector connected to a power supply and an intermittent drive signal generating circuit, and an emitter connected to a first switch terminal of a wiper switch. Connected,
When the ignition switch is in the ON state and the wiper switch is in the intermittent position, the intermittent drive signal generation circuit is turned on, while the riser relay is turned on and the ignition terminal detection transistor and one end are connected to the power supply. In addition, the other end has a second relay coil connected to the collector of the ignition terminal detection transistor, a second relay movable contact connected to the first brush terminal of the wiper motor, and a second grounded second relay coil. It has a relay normally-closed contact and a second relay normally-open contact connected to one end of the second relay coil, and corresponds to the switching position of the wiper fixed-position stop switch. Rise-up relay that switches the current direction of the power supply to the brush terminal of 2 and the second relay whose base is a rise-up relay Connected to the contact, a collector connected to the collector of the transistor detecting ignition terminal,
The emitter is connected to the movable contact of the wiper fixed position stop switch and the first relay normally closed contact of the intermittent relay, and continues to turn on the second relay coil of the rise-up relay even after the ignition terminal detection transistor is turned off. It is characterized in that it is provided with a relay holding transistor.

In the wiper device according to the third aspect of the present invention, a wiper switch having a fifth switch terminal connected to the second switch terminal when switched to the cleaning position,
One of the brush terminals is connected to a power source, and the other brush terminal is provided with a washer pump connected to the fifth switch terminal of the wiper switch and the intermittent drive signal generating circuit.

[0010]

In the wiper device according to the first aspect of the present invention, the ignition switch is turned on,
When the wiper switch is switched to the intermittent position, the ignition terminal detection transistor is turned on, the rise relay is turned on, and the intermittent relay is turned on by the drive signal generated by the intermittent drive signal generation circuit, which causes the wiper motor output. The shaft rotates forward and the wiper blade wipes the wiping surface through the intermittent downtime. Then, while the wiper blade is wiping the wiping surface through the intermittent down time, if the ignition switch is turned off while the wiper switch is in the intermittent position, the ignition terminal detection transistor turns off, but the relay is held. Since the rise transistor is kept on by the transistor for forming the wiper switch and the same circuit configuration as when the wiper switch is switched from the intermittent position to the stop position is formed, the output shaft of the wiper motor remains until the wiper blade reaches the lower reversal position. When the wiper blade reaches the lower reversal position, the output shaft of the wiper motor reversely rotates, and when the wiper blade reaches the storage position below the lower reversal position, the output shaft of the wiper motor stops. Therefore, even if the ignition switch is switched off during the wiping operation of the wiper motor, the wiper motor continues to operate until the wiper blade reaches the retracted position.

In the wiper device according to the second aspect of the present invention, when the ignition switch is switched on and the wiper switch is switched to the intermittent position, the ignition terminal detecting transistor is switched on and the rise-up relay is the second relay. The coil is turned on when an energization path is formed, and the intermittent relay is turned on when the energization path is formed on the first relay coil by the drive signal generated by the intermittent drive signal generation circuit, and the wiper motor is rotated by the output shaft. Rotates forward and the wiper blade wipes the wiping surface through the intermittent downtime. Then, when the wiper blade is wiping the wiping surface through the intermittent down time and the ignition switch is switched off while the wiper switch is in the intermittent position, the base current of the ignition terminal detection transistor is cut off. However, the rise-up relay is a collector of the relay holding transistor,
The conduction path is continuously formed through the emitter, the ON state is maintained, and the same circuit configuration as when the wiper switch is switched from the intermittent position to the stop position is formed, so that the wiper blade is set to the lower inverted position. Until the output shaft of the wiper motor continues to rotate forward, and when the wiper blade reaches the lower reversal position, the output shaft of the wiper motor reversely rotates, and when the wiper blade reaches the retracted position below the lower reversal position, the output shaft of the wiper motor Stops. Therefore, even if the ignition switch is switched off during the wiping operation of the wiper motor, the wiper motor continues to operate until the wiper blade reaches the retracted position.

In the wiper device according to the third aspect of the present invention, when the wiper switch is switched to the cleaning position,
The washer pump operates and sprays the cleaning liquid onto the wiping surface,
When the ignition switch is switched on and the wiper switch is switched to the intermittent position, the ignition terminal detection transistor is switched on, and the rise-up relay is switched on by forming a conduction path in the second relay coil, and intermittent drive is performed. The intermittent relay is turned on by the energization path formed in the first relay coil by the drive signal generated by the signal generation circuit, the output shaft of the wiper motor rotates forward, and the wiper blade passes through the intermittent pause time. Wipe the wiping surface. Then, when the wiper blade is wiping the wiping surface through the intermittent down time and the ignition switch is switched off while the wiper switch is in the intermittent position, the base current of the ignition terminal detection transistor is cut off. The rise-up relay is turned off by turning on, but the conduction path is continuously formed through the collector and emitter of the relay holding transistor, the on-state is held, and the wiper switch is switched from the intermittent position to the stop position. Since the same circuit configuration is formed, the output shaft of the wiper motor continues to rotate forward until the wiper blade reaches the lower reversal position, and when the wiper blade reaches the lower reversal position, the output shaft of the wiper motor reversely rotates and the wiper blade Output of the wiper motor when reaches the storage position below the lower reversal position There is stopped. Therefore, even if the ignition switch is switched off during the wiping operation of the wiper motor, the wiper motor continues to operate until the wiper blade reaches the retracted position.

[0013]

1 shows an embodiment of a wiper device according to the present invention.

The illustrated wiper device 1 mainly includes a power source 50, an ignition terminal 10, a wiper switch 2, and a wiper motor 4 having a wiper fixed position stop switch 3 built-in.
It consists of a washer pump 5 and a control circuit 6,
The control circuit 6 includes an intermittent drive signal generation circuit IC, a first switching relay RL1 which is an intermittent relay, a second switching relay RL2 which is a rise-up relay, a first switching transistor TR1 which is a relay holding transistor, and an ignition. Second switching transistor TR2, which is a terminal detection transistor, and resistor R
1, R2, R3, R4, R5, R6, R7, R8, R
9, R10, R11, R12, R13, diode D
1, D2, D3, D4, Zener diodes ZD1, ZD
2, capacitors C1, C2, C3, C4, C5, C6
Each has a C7.

The wiper switch 2 includes a first switch terminal I, a second switch terminal E, a third switch terminal S,
A fourth switch terminal L and a fifth switch terminal W are provided respectively, and when the wiper switch 2 is switched to the stop position (OFF), the third switch terminal S is provided.
Is connected to the fourth switch terminal L, and the intermittent position (IN
T), the first switch terminal I is connected to the third switch terminal E, the third switch terminal S is connected to the fourth switch terminal L, and the cleaning position (WA
When switched to SH), the second switch terminal E is connected to the fifth switch terminal W.

The wiper switch 2 has a first switch terminal I connected to a first terminal 6a provided in the control circuit 6, and a second switch terminal I
Switch terminal E is connected to a third terminal 6b which is a ground terminal provided in the control circuit 6, a third switch terminal S is connected to a second terminal 6c provided in the control circuit 6, and a fourth switch terminal L Is connected to a second brush terminal 4b included in the wiper motor 4 described later, and the fifth switch terminal W is connected to a sixth terminal 6d included in the control circuit 6.

The wiper motor 4 has a first brush terminal 4
a, a second brush terminal 4b, and an output shaft 4c are provided. In the wiper motor 4, when the current flows from the first brush terminal 4a to the second brush terminal 4b, the output shaft 4c rotates forward, On the contrary, from the second brush terminal 4b to the first
When a current flows through the brush terminal 4a, the output shaft 4c rotates in the reverse direction. The output shaft 4c is connected via a link 7 to a pivot shaft 8 rotatably supported by the vehicle body. The pivot shaft 8 has a wiper blade 1 on a wiping surface 9
Since the wiper arm 11 with 0 attached is connected,
By rotating the output shaft 4c in the forward direction, the wiper blade 10 is reciprocally wiped between the upper reversal position A and the lower reversal position B of the wiping surface 9, and when the wiper blade 10 is in the lower reversal position B, the output shaft 4c is rotated. The reverse rotation of 4c moves the wiper blade 10 to the storage position C below the lower reversal position B.

The wiper motor 4 has a first brush terminal 4a.
Is connected to the fourth terminal 6e provided in the control circuit 6, and the second brush terminal 4b is connected to the fourth switch terminal L of the wiper switch 2 as described above.

The wiper fixed position stop switch 3 incorporated in the wiper motor 4 includes a movable contact 3a, a first contact 3b,
A second contact 3c is provided.

In the wiper fixed position stop switch 3, the movable contact 3a is mechanically coupled to the output shaft 4c of the wiper motor 4 and is connected to the seventh terminal 6f provided in the control circuit 6, and the first contact 3b is grounded. And the second contact 3c is connected to the control circuit 6
Is connected to a fifth terminal 6g which is a power supply terminal provided in the.

In the wiper fixed position stop switch 3, since the movable contact 3a operates together with the output shaft 4c of the wiper motor 4, the movable contact 3a is electrically connected to the first contact 3b unless the wiper blade 10 is in the lower reversal position B. The movable contact 3a is connected and grounded, and the wiper blade 10
Comes to the lower reversal position B, the movable contact 3a moves to the second contact 3
electrically connected to c.

The wiper fixed position stop switch 3 has the wiper switch 2 from the intermittent position (INT) to the stop position (OFF).
When the wiper blade 10 is not in the lower reversal position B when the switch is switched to, the movable contact 3a is connected to the first contact 3b, so that the first brush terminal 4 of the wiper motor 4 is connected.
The current supply from the power source 50 is continued from a toward the second brush terminal 4b, and when the wiper blade 10 reaches the lower reversal position B, the movable contact 3a and the first contact 3c are separated to store the rise. Second via wiper motor 4
The current of the power supply 50 is supplied from the brush terminal 4b to the first brush terminal 4a to move the wiper blade 10 to the storage position C below the lower reversal position B, and the wiper blade 10 reaches the storage position C. In doing so, it has a function of performing an operation for cutting off the current supply to the wiper motor 4.

In the washer pump 5, one brush terminal 5a is connected to the power source 50, and the other brush terminal 5b is connected to the fifth switch terminal W of the wiper switch 2.

The washer pump 5 jets the cleaning liquid stored in a washer tank (not shown) from the nozzle to the wiping surface 9 when the current of the power source 50 flows between the brush terminals 5a and 5b on the other hand.

The ignition terminal 20 is connected to the ignition switch 21 and the eighth terminal 6h provided in the control circuit 6.

The ignition terminal 20 applies a high-level potential to the eighth terminal 6h of the control circuit 6 when the ignition switch 21 is switched on, and a high-level potential when the ignition switch 21 is switched off. No voltage is applied to the eighth terminal 6h of the control circuit 6.

On the other hand, the port 1 of the intermittent drive signal generating circuit IC provided in the control circuit 6 is a washer input terminal, and has resistors R6 and R7 for limiting current, and a capacitor C6 for setting a washer-on delay time. , A capacitor C7 for AC noise filter, a diode D1 for quick charging when the washer is off, and a discharging resistor R for the capacitor C6
11 is connected to the sixth terminal 6d of the control circuit 6 via 11 and is connected to the fifth terminal 6g (power supply terminal) of the control circuit 6 via the charging resistor R10 of the capacitor C6. When the wiper switch 2 is switched to the cleaning position, it goes to a low level to recognize the washer operation. On the contrary, when the wiper switch 2 in the cleaning position is switched to the stop position, it is inverted to a high level.

Port 2 of the intermittent drive signal generation circuit IC is
The intermittent input terminal is connected to the collector of the second switching transistor TR2 via the current limiting resistor R8, and is also connected to the fifth terminal 6g of the control circuit 6 via the resistors R8 and R9. Therefore, when the wiper switch 2 is switched to the intermittent position, it becomes low level to recognize the intermittent operation, and when the wiper switch 2 is switched from the intermittent position to another position, the low level is inverted to the high level by the resistor R9. .

Port 3 of the intermittent drive signal generating circuit IC is
The intermittent timer capacitor terminal is used for charging and discharging the intermittent timer capacitor C4, and the output is turned on or off depending on the potential of the capacitor C4.

Port 4 of the intermittent drive signal generation circuit IC is
It is a charging resistor terminal, and the capacitor C is connected by the resistor R5.
Set the charge / discharge time constant of 4.

Port 5 of the intermittent drive signal generation circuit IC is
This is a ground terminal.

Port 6 of the intermittent drive signal generating circuit IC is
The wiper fixed position stop switch terminal is connected to the movable contact 3a of the wiper fixed position stop switch 3 through the current limiting resistor R4 and the seventh terminal 6f of the control circuit 6, so that the wiper fixed position stop is performed. When the movable contact 3a of the switch 3 is grounded, it is discharged, and the wiper fixed position stop switch 3
If the movable contact 3a is not grounded, it has a function of charging.

Port 7 of the intermittent drive signal generating circuit IC is
The intermittent output signal generating circuit I is an intermittent output terminal.
The output is inverted from the high level to the low level when a predetermined intermittent pause time elapses after C starts the intermittent operation.

Port 7 of the intermittent drive signal generation circuit IC is
Since it is connected to the first relay coil RL1-1 of the first switching relay RL1 and the second relay coil RL2-1 of the second switching relay RL2 via the diode D2, it outputs a low level. First relay coil R of first switching relay RL1
L1-1 and the second of the second switching relay RL2
Both switching relays RL1 and RL2 by turning on the relay coil RL2-1 and outputting a high level.
The relay coils RL1-1 and RL2-1 are turned off. The Zener diode D1 has a function of protecting the output circuit of the intermittent drive signal generation circuit IC from the counter electromotive force of the first relay coil RL1-1.

Port 8 of the intermittent drive signal generating circuit IC is
It is a protection terminal of the output circuit and has a function of delaying the output by the capacitor C5 connected between the output port and the port 9.

Port 9 of the intermittent drive signal generation circuit IC is
The power supply terminal is connected to the fifth terminal 6g of the control circuit 6 via resistors R2 and R3 for limiting the current of the Zener diode ZD2 for controlling the power supply voltage.

First switching transistor TR1
Is the fourth terminal 6 of the control circuit 6 whose base is connected via the resistor R1.
A second switching transistor TR2, which is connected to e and has a collector via the anode of the diode D4, which will be described later.
Is connected to the movable contact 3a of the wiper fixed position stop switch 3 through the anode of the diode D3 and the seventh terminal 6f of the control circuit 6.

First switching transistor TR1
Is a second switching relay RL2 whose base will be described later.
Since it is connected to the second relay movable contact RL2-2 provided in, the second relay movable contact RL2-2 is connected to the power supply side second relay normally open contact RL2-4 and the emitter is The movable contact 3a of the wiper fixed-position stop switch 3 that is connected is the first contact 3 that is connected to ground.
If it is connected to b, it turns on, and if the movable contact 3a of the wiper fixed position stop switch 3 is connected to the second contact 3c connected to the power source 50, it turns off.

The first switching transistor TR1 is a second switching transistor T which will be described later.
When R2 is turned on, the second relay coil RL2-1 provided in the second switching relay RL2 which will be described later is also turned on, and the movable contact 3a of the wiper fixed position stop switch 3 is connected to the ground. The second relay coil RL is turned on by being connected to the first contact 3b.
Even if the second switching transistor TR2 is turned off after it is turned on by turning on 2-1 and is turned on,
It has a function of continuously forming the ground path of the second relay coil RL2-1 and continuing to turn on the second relay coil RL2-1.

Second switching transistor TR2
Is used to detect the switching position of the wiper switch 2 and the switching state of the ignition switch 21, the base is connected to the ignition terminal 20 via the resistor R2, the collector is connected to the cathode of the diode D4, and the second switching is performed. Second relay coil RL provided in the relay RL2
2-1 and the fifth terminal 6g of the control circuit 6 via the resistor R9,
Port 2 of the intermittent drive signal generation circuit IC via the resistor R8
It is connected to the.

Second switching transistor TR2
When the ignition switch 21 is turned on,
When the wiper switch 2 is switched to the intermittent position and the first switch terminal I of the wiper switch 2 is connected to the second switch terminal E, the wiper switch 2 is turned on and the intermittent drive signal generation circuit IC is turned on.
Of the intermittent drive signal generating circuit IC is started by turning the port 2 to a low level, and is turned off when the ignition switch 21 is turned off to stop the intermittent operation of the intermittent drive signal generating circuit IC. With.

When the second switching transistor TR2 is turned off, the ground path of the second relay coil RL2-1 provided in the second relay RL2 is cut off, but the first switching transistor TR1 is set to the second switching transistor TR1. Continue to turn on the relay coil RL2-1.

The first switching relay RL1 includes a first relay coil RL1-1 and a first relay movable contact R.
L1-2, a first relay normally closed contact RL1-3, and a first relay normally open contact RL1-4 are provided.

The first switching relay RL1 has a first
One end of the relay coil RL1-1 is connected to the fifth terminal 6g of the control circuit 6, and the other end of the first relay coil RL1-1 is connected to the port 7 of the intermittent drive signal generation circuit IC,
The first relay movable contact RL1-1 is connected to the second terminal 6c of the control circuit 6, and the first relay normally closed contact RL1-3 is connected via the resistor R4 to the port 6 of the intermittent drive signal generation circuit IC and the capacitor C2. End of the control circuit 6, the seventh terminal 6f
And the first relay normally open contacts RL1-4 are grounded.

In the first switching relay RL1, when the wiper switch 2 is switched to the intermittent position, the intermittent drive signal generating circuit IC starts the intermittent operation and the port 7 outputs a low level, whereby the first relay coil RL1. -1 turns on, and the first relay movable contact RL1-2
Is grounded, the second terminal 6 of the control circuit 6 is
The second brush terminal 4b of the wiper motor 4 is grounded via the c, the third switch terminal S of the wiper switch 2 and the fourth switch terminal L of the wiper switch 2, and contrary to this, the intermittent drive signal generation circuit When the port 7 of the IC outputs a high level, it turns off and leaves the ground path of the second brush terminal 4b of the wiper motor 4 to the wiper fixed position stop switch 3.

The second switching relay RL2 has a second
One end of the relay coil RL2-1 is connected to the fifth terminal 6g of the control circuit 6, and the other end of the second relay coil RL2-1 is connected to the collector of the second switching transistor TR2 via the diode D4. The second relay movable contact RL2-2 is connected to the fourth terminal 6e of the control circuit 6, the second relay normally closed contact RL2-3 is grounded, and the second
Relay normally open contact RL2-4 of the fifth terminal 6 of the control circuit 6
connected to g.

In the second switching relay RL2, when the ignition switch 21 is turned on, the wiper switch 2 is switched to the intermittent position, and the first switch terminal I of the wiper switch 2 becomes the second switch terminal E. When connected and the second switching transistor TR2 is turned on, the second relay coil RL2-1 is turned on, and the second relay coil RL2-1 is turned on.
Relay movable contact RL2-2 of the second relay normally open contact R
By connecting to the L2-4, the function of turning on the first transistor TR1 and the ignition switch 21 when the wiper switch 2 is switched to the intermittent position.
Is turned off and the second switching transistor TR2 is turned off.
Is turned off, the first switching transistor T
The second relay coil RL2-1 continues to be turned on by turning on R1, and has a function of forming a circuit similar to that when the wiper switch 2 is switched to the stop position.

In the wiper device 1 having such a structure, when the wiper blade 10 is in the retracted position C and the wiper switch 2 is switched to the stop position, the ignition switch 21 is switched on. The first and second switching transistors TR1 and TR2 are off,
The first and second relays RL1 and RL2 are also off.

In this state, when the wiper switch 2 is switched to the intermittent position, the second switching transistor TR
2 is turned on, the second relay coil RL2-1 of the second switching relay RL2 is turned on, and the second relay movable contact RL2-2 is connected to the second relay normally open contact RL2-4. , The first transistor TR1 is turned on, the power supply 50, the fifth terminal 6g of the control circuit 6, the second relay normally open contact RL2-4 of the second switching relay RL2, the second relay movable contact RL2-2, The fourth terminal 6e of the control circuit 6, the first brush terminal 4a of the wiper motor 4, the second brush terminal 4b of the wiper motor 4, the fourth switch terminal L of the wiper switch 2, the third switch terminal S of the wiper switch 2. , The second terminal 6c of the control circuit 6 and the first relay movable contact RL1- of the first switching relay RL1.
2, first relay normally closed contact RL1-3, seventh terminal 6f of control circuit 6, movable contact 3 of wiper fixed position stop switch 3
a, the first contact point 3b, and a grounding energization path are formed, the output shaft 4c of the wiper motor 4 rotates forward, and the output shaft 4c rotates forward, so that the wiper blade 10 moves from the retracted position C to the lower reversal position B. The wiping surface 9 is wiped toward the upper reversal position A via the, and the wiper blade 10 is reversed at the upper reversal position A to wipe the wiping surface 9 toward the lower reversal position B.

At the same time when the second switching transistor TR2 is turned on, the port 2 of the intermittent drive signal generating circuit IC is
Is switched to the low level and the intermittent drive signal generation circuit IC starts the intermittent operation, and when the wiper blade 10 is reversed at the upper reversal position A and reaches the lower reversal position B, the movable contact 3a of the wiper fixed position stop switch 3 is moved. Is the second contact 3
When the wiper motor 4 is connected to c, the energization path is cut off, the rotation of the output shaft 4c is stopped, and the wiper blade 10 after the initial wiping is stopped in the lower reversal position B enters the intermittent rest time. .

At this time, the movable contact 3a of the wiper fixed-position stop switch 3 is connected to the second contact 3c, so that the intermittent drive signal generating circuit IC has a predetermined level with the port 6 inverted to a high level. Intermittent downtime begins. When the intermittent pause time ends, the port 7 of the intermittent drive signal generation circuit IC is inverted from the high level to the low level, so that the first switching relay RL1 turns on the first relay coil RL1-1 and the first switching relay RL1 turns on. Relay movable contact R
Since L1-2 is connected to the first relay normally open contact RL1-4, the power source 50, the fifth terminal 6g of the control circuit 6, the second relay normally open contact RL of the second switching relay RL2.
2-4, second relay movable contact RL2-2, control circuit 6
Fourth terminal 6e of the first brush terminal 4 of the wiper motor 4
a, the second brush terminal 4b of the wiper motor 4, the fourth switch terminal L of the wiper switch 2, the third switch terminal S of the wiper switch 2, the second terminal 6c of the control circuit 6, and the first switching relay RL1. The first relay movable contact RL1-2, the first relay normally open contact RL1-4, and the grounding energization path are formed, the output shaft 4c of the wiper motor 4 starts forward rotation, and the wiper blade 10 is in the lower reversal position. B
Then, the wiping operation is started toward the upper reversal position A.

When the wiper blade 10 reaches the lower reversal position B after reversing at the upper reversal position A, as described above, the intermittent rest time starts, and when the intermittent rest time ends, the output shaft 4c of the wiper motor 4 is stopped. Starts to rotate in the normal direction, and thereafter, the operation is repeated. in this case,
As described above, the intermittent quiescent time is set to a value predetermined by the time constants of the capacitor C3 connected to the port 3 and the resistor R5 connected to the port 4 of the intermittent drive signal generation circuit IC. By replacing the resistor R5 with a variable resistor, the intermittent down time can be arbitrarily changed.

Then, the ignition switch 21 is turned on and the wiper switch 2 is switched to the intermittent position, so that the wiping operation is performed between the lower reversal position B and the upper reversal position A through a predetermined intermittent rest time. When the wiper switch 2 is switched from the intermittent position to the stop position while the operating wiper blade 10 is between the upper inverted position A and the lower inverted position B, the wiper switch 2
Of the second switching transistor TR2 because the first switch terminal I of the
Is turned off, the intermittent drive signal generation circuit IC becomes high level at port 2, stops the intermittent operation, becomes high level at port 7, and the first switching relay RL1 becomes the first relay coil RL1-1. Since it is turned off and the first relay movable contact RL1-2 is connected to the first relay normally closed contact RL1-3, the power source 50, the fifth terminal 6g of the control circuit 6,
A second relay normally-open contact RL2-4 of the second switching relay RL2, a second relay movable contact RL2-2, a fourth terminal 6e of the control circuit 6, a first brush terminal 4a of the wiper motor 4, and a wiper motor 4 of the wiper motor 4. The second brush terminal 4b, the fourth switch terminal L of the wiper switch 2, the third switch terminal S of the wiper switch 2, the second terminal 6 of the control circuit 6.
c, the first relay movable contact RL1-2 of the first switching relay RL1, the first relay normally closed contact RL1-3,
The seventh terminal 6f of the control circuit 6, the movable contact 3a of the wiper fixed-position stop switch 3, the first contact 3b, and the grounding energization path are formed, and the energization path of the wiper motor 4 is continuously formed, so that the output shaft 4c is positive. Continue to rotate, wiper blade 1
0 continuously wipes the wiping surface 9 toward the lower reversal position B.

When the wiper blade 10 reaches the lower reversal position B, the movable contact 3a of the wiper fixed position stop switch 3 is moved.
Is connected to the second contact 3c apart from the first contact 3b, the emitter potential of the first switching transistor TR1 is connected to the power supply side, the first switching transistor TR1 is turned off, and the second switching transistor TR1 is turned off. The relay RL2 is also turned off, and the second relay movable contact RL2-
2 is connected to the second relay normally closed contact RL2-3, the power supply 50, the second contact 3c of the wiper fixed position stop switch 3, the movable contact 3a, the seventh terminal 6f of the control circuit 6, and the first contact. The first relay normally closed contact RL1-3 of the switching relay RL1, the first relay movable contact RL1-2, the second terminal 6c of the control circuit 6, the third switch terminal S of the wiper switch 2, the wiper switch 2 4 switch terminals L,
Second brush terminal 4b of wiper motor 4, first brush terminal 4a of wiper motor 4, fourth terminal 6 of control circuit 6
e, the second relay movable contact RL2-2 of the second switching relay RL2, the second relay normally closed contact RL2-3,
Since the third terminal 6b of the control circuit 6 and the energization path for grounding are formed, the output shaft 4c of the wiper motor 4 rotates in the reverse direction, and the wiper blade 10 in the lower reversal position B moves to the lower reversal position B.
When it moves to the storage position C below the storage position C and reaches the storage position C, the movable contact 3a of the wiper fixed position stop switch 3 is connected to the first contact 3b, the energization path to the wiper motor 4 is cut off, and the wiper blade is cut off. In the state where 10 is stored in the storage position C, the output shaft 4c of the wiper motor 4 stops rotating.

The ignition switch 21 is turned on and the wiper switch 2 is switched to the intermittent position, so that the wipe operation is performed between the lower reversal position B and the upper reversal position A through a predetermined intermittent rest time. When the ignition switch 21 is switched off to stop the engine when the wiper blade 10 being operated is between the upper reversal position A and the lower reversal position B, the potential of the power supply 50 is applied to the ignition terminal 20. Since the second switching transistor TR2 is cut off, the base current is cut off, but the first switching transistor TR1 is in the ON state and continues to form the ground path of the second switching relay RL2. Second relay coil RL2-1 of switching relay RL2
Keeps on, the power supply 50, the fifth terminal 6g of the control circuit 6,
A second relay normally-open contact RL2-4 of the second switching relay RL2, a second relay movable contact RL2-2, a fourth terminal 6e of the control circuit 6, a first brush terminal 4a of the wiper motor 4, and a wiper motor 4 of the wiper motor 4. The second brush terminal 4b, the fourth switch terminal L of the wiper switch 2, the third switch terminal S of the wiper switch 2, the second terminal 6 of the control circuit 6.
c, first relay movable contact RL1-2 of first switching relay RL1, first normally closed contact RL1-2, seventh terminal 6f of control circuit 6, movable contact 3a of wiper fixed position stop switch 3, ground The output shaft 4c of the wiper motor 4 continues to rotate forward due to the formation of the current-carrying path.

When the wiper blade 10 reaches the lower reversal position B in this state, the movable contact 3a of the wiper fixed position stop switch 3 is connected to the second contact 3c.
Is connected to the power supply side of the first switching transistor TR1.
1 is turned off, the second switching relay RL2 is also turned off, and the second relay movable contact RL2-2 is connected to the second relay normally closed contact RL2-3, so that the power source 50,
The second contact 3c of the wiper fixed-position stop switch 3, the movable contact 3a, the seventh terminal 6f of the control circuit 6, the first relay normally closed contact RL1-3 of the first switching relay RL1, the first relay movable contact. RL1-2, second terminal 6c of control circuit 6, third switch terminal S of wiper switch 2, fourth switch terminal L of wiper switch 2, wiper motor 4
Second brush terminal 4b, the first brush terminal 4a of the wiper motor 4, the fourth terminal 6e of the control circuit 6, the second relay normally-closed contact RL1- of the second switching relay RL2.
3, the second relay movable contact RL2-2, the third terminal 6b of the control circuit 6, and the grounding energization path are formed, so that the output shaft 4c of the wiper motor 4 rotates in the reverse direction, and the wiper blade in the lower reversal position B is present. When 10 moves to the storage position C below the lower reversal position B and reaches the storage position C, the movable contact 3a of the wiper fixed-position stop switch 3 moves to the first contact 3b.
Since the power supply path to the wiper motor 4 is cut off, the output shaft 4c of the wiper motor 4 stops rotating with the wiper blade 10 stored in the storage position C.

When the wiper switch 2 is switched from the stop position to the cleaning position, the second switch terminal E of the wiper switch 2 is connected to the fifth switch terminal W, so that the other brush terminal of the washer pump 5 is connected. A ground path is formed in 5b, and while the wiper switch 2 is switched to the cleaning position, the cleaning liquid stored in the washer tank (not shown) is sprayed from the nozzle onto the wiping surface 9.

As described above in detail, the wiper blade 1
When the wiper switch 2 is still in the intermittent position and the ignition switch 21 is switched off while 0 is wiping the wiping surface through the intermittent down time, the wiper switch 2 is switched from the intermittent position to the stop position. Since the same circuit configuration is formed, the output shaft 4c of the wiper motor 4 does not stop rotating, and the output shaft 4c of the wiper motor 4 continues to rotate forward until the wiper blade 10 reaches the lower reversal position B.
When the wiper blade 10 reaches the lower reversal position B, the output shaft 4c of the wiper motor 4 rotates in the reverse direction, and the wiper blade 1
When 0 reaches the storage position C below the lower reversal position B, the output shaft 4c of the wiper motor 4 stops.

[0059]

As described above, according to the wiper device of the first aspect of the present invention, when the ignition switch is turned on and the wiper switch is switched to the intermittent position, the ignition terminal detecting transistor is activated. When the riser relay is turned on, the drive signal generated by the intermittent drive signal generation circuit turns on the intermittent relay, which causes the output shaft of the wiper motor to rotate forward and the wiper blade to pass through the intermittent pause time. Wipe the wiping surface. Then, while the wiper blade is wiping the wiping surface through the intermittent down time, if the ignition switch is turned off while the wiper switch is in the intermittent position, the ignition terminal detection transistor turns off, but the relay is held. Since the rise transistor is held in the ON state by the transistor for use and the wiper switch has the same circuit configuration as when the wiper switch is switched from the intermittent position to the stop position,
The output shaft of the wiper motor continues to rotate forward until the wiper blade reaches the lower reversal position, and when the wiper blade reaches the lower reversal position, the output shaft of the wiper motor reversely rotates and the wiper blade moves to the storage position below the lower reversal position. When it reaches, the output shaft of the wiper motor stops, so
Even if the ignition switch is turned off while the wiper is operating and the voltage of the power supply is no longer applied to the ignition terminal, the wiper does not stop on the wiping surface but continues to operate to the specified stop position and then stops at the retracted position. Thus, there is an excellent effect that the wiper can be stopped at a predetermined position when it is not used.

According to the wiper device of the second aspect of the present invention, when the ignition switch is switched on and the wiper switch is switched to the intermittent position, the ignition terminal detecting transistor is switched on and the rise-up relay is switched to the second position. The relay coil is turned on when an energization path is formed in the relay coil, and the intermittent relay is turned on when the energization path is formed in the first relay coil by the drive signal generated by the intermittent drive signal generation circuit. The output shaft rotates in the forward direction, and the wiper blade wipes the wiping surface through the intermittent down time. Then, when the wiper blade is wiping the wiping surface through the intermittent down time and the ignition switch is switched off while the wiper switch is in the intermittent position, the base current of the ignition terminal detection transistor is cut off. However, the rise-up relay is a collector of the relay holding transistor,
The conduction path is continuously formed through the emitter, the ON state is maintained, and the same circuit configuration as when the wiper switch is switched from the intermittent position to the stop position is formed, so that the wiper blade is set to the lower inverted position. Until the output shaft of the wiper motor continues to rotate forward, and when the wiper blade reaches the lower reversal position, the output shaft of the wiper motor reversely rotates, and when the wiper blade reaches the retracted position below the lower reversal position, the output shaft of the wiper motor Stops even if the ignition switch is turned off while the wiper is operating and the voltage of the power supply is no longer applied to the ignition terminal, the wiper does not stop on the wiping surface but continues to operate to the specified stop position. It has an excellent effect that the wiper can be stopped at a predetermined position when not in use, and then stopped at the storage position. .

According to the wiper device of the third aspect of the present invention, when the wiper switch is switched to the cleaning position,
The washer pump operates and sprays the cleaning liquid onto the wiping surface,
When the ignition switch is switched on and the wiper switch is switched to the intermittent position, the ignition terminal detection transistor is switched on, and the rise-up relay is switched on by forming a conduction path in the second relay coil, and intermittent drive is performed. The intermittent relay is turned on by the energization path formed in the first relay coil by the drive signal generated by the signal generation circuit, the output shaft of the wiper motor rotates forward, and the wiper blade passes through the intermittent pause time. Wipe the wiping surface. Then, when the wiper blade is wiping the wiping surface through the intermittent down time and the ignition switch is switched off while the wiper switch is in the intermittent position, the base current of the ignition terminal detection transistor is cut off. The rise-up relay is turned off by turning on, but the conduction path is continuously formed through the collector and emitter of the relay holding transistor, the on-state is held, and the wiper switch is switched from the intermittent position to the stop position. Since the same circuit configuration is formed, the output shaft of the wiper motor continues to rotate forward until the wiper blade reaches the lower reversal position, and when the wiper blade reaches the lower reversal position, the output shaft of the wiper motor reversely rotates and the wiper blade Output of the wiper motor when reaches the storage position below the lower reversal position There will stop, even if the wiper is no longer the voltage of the power supply the ignition switch is switched off in the ignition pin is applied during operation,
The wiper is not stopped on the wiping surface but is continuously operated to a predetermined stop position and then stopped at the storage position, so that the wiper can be stopped at the predetermined position when not in use.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of a wiper device according to the present invention.

[Explanation of symbols]

 1 wiper device 2 wiper switch 3 wiper fixed position stop switch 3a movable contact 3b first contact 3c second contact 4 wiper motor 4a first brush terminal 4b second brush terminal 4c output shaft 5 washer pump 5a one brush terminal 5b The other brush terminal 9 Wiping surface 10 Wiper blade 20 Ignition terminal 21 Ignition switch 50 Power supply E Second switch terminal I First switch terminal IC Intermittent drive signal generation circuit L Fourth switch terminal RL1 Intermittent relay RL1-1 First relay coil RL1-2 First relay movable contact RL1-3 First relay normally closed contact RL1-4 First relay normally open contact RL2 Rise-up relay RL2-1 Second relay coil RL2-2 2 relay movable contact RL2-3 2nd relay normally closed contact RL2-4 Second relay normally open contact S Third switch terminal TR1 Relay holding transistor TR2 Ignition terminal detection transistor W Fifth switch terminal

Claims (3)

[Claims] 1. A power supply, an ignition terminal connected to an ignition switch, a wiper switch capable of switching between a stop position and an intermittent position, a first brush terminal, and a second brush terminal. The wiper blade is wiped between the upper reversal position and the lower reversal position on the wiping surface while being positively rotated by supplying a current in the forward direction to the first and second brush terminals, while the wiper blade is in the lower reversal position. At this time, a wiper motor having an output shaft for rotating the wiper blade to a storage position lower than the lower reversal position by being reversely rotated by supplying current to the first and second brush terminals in the reverse direction, and an output shaft of the wiper motor. A movable contact coupled to the wiper switch, electrically connected to the wiper switch, a second contact connected to a power source, and a first contact grounded,
If the wiper blade is not in the lower reversal position, the movable contact is the first
A wiper fixed position stop switch connected to the contact of the wiper blade and the movable contact connected to the second contact when the wiper blade reaches the lower reversal position; an intermittent drive signal generation circuit for generating an intermittent drive signal when the wiper blade is turned on; An intermittent relay that is connected to a drive signal generation circuit and that is intermittently turned on by a drive signal generated by the intermittent drive signal generation circuit during an intermittent dwell time, and that is connected to the ignition terminal and the ignition switch is turned on. Yes, and the wiper switch is turned on when it is in the intermittent position, while turning on the intermittent drive signal generating circuit, is connected to the ignition terminal detection transistor for turning on the rise-up relay, and the ignition terminal detection transistor,
A rise-up relay for switching the current direction of a power source supplied to the first brush terminal and the second brush terminal of the wiper motor corresponding to the switching position of the wiper fixed position stop switch; and a rise-up relay connected to the rise-up relay, A wiper device comprising a relay holding transistor which holds the rise-up relay ON even after the ignition terminal detecting transistor is turned OFF. 2. A power source, an ignition terminal connected to an ignition switch, first, second switch terminals and a third switch terminal which are switchable between a stop position and an intermittent position and which are connected when switched to the intermittent position. , A fourth switch terminal, a wiper switch having third and fourth switch terminals connected when switched to a stop position, a first brush terminal, and a fourth switch terminal of the wiper switch. And a second brush terminal, and the positive rotation of the first and second brush terminals causes forward rotation of the wiper blade between the upper reversal position and the lower reversal position on the wiping surface. While the wiping operation is performed, when the wiper blade is in the lower reversal position, the wiper blade is reversely rotated by the reverse current supply to the first and second brush terminals to move the wiper blade from the lower reversal position. Is also connected to the power supply and a movable contact connected to the output shaft of the wiper motor and connected to the first relay normally closed contact provided in the intermittent relay. A second contact and a grounded first contact, the movable contact is connected to the first contact when the wiper blade is not in the lower reversal position, and the movable contact is connected when the wiper blade is in the lower reversal position. A wiper fixed position stop switch connected to the second contact, an intermittent drive signal generation circuit that generates an intermittent drive signal when turned on, and one end connected to a power supply and the other end connected to the intermittent drive signal generation circuit. A first relay coil connected,
A first relay movable contact connected to the third switch terminal of the wiper switch, a movable contact of the wiper fixed position stop switch and a first relay normally closed contact connected to the intermittent drive signal generating circuit, and ground An intermittent relay having a normally open first relay contact, a base connected to the ignition terminal, a collector connected to a power supply and an intermittent drive signal generation circuit, and an emitter connected to the first switch terminal of the wiper switch. When the ignition switch is in the ON state and the wiper switch is in the intermittent position, it is turned on to turn on the intermittent drive signal generating circuit, and an ignition terminal detection transistor for turning on the rise-up relay. , One end of which is connected to the power supply and the other end of which is connected to the ignition terminal detection transistor Of the second relay coil, a second relay movable contact connected to the first brush terminal of the wiper motor, a grounded second relay normally closed contact, and a second relay coil of the second relay coil. A second relay normally-open contact connected to one end of the wiper motor and corresponding to the switching position of the wiper fixed-position stop switch, the current of the power supply supplied to the first brush terminal and the second brush terminal of the wiper motor. The rise-up relay for switching the direction, the base is connected to the second relay movable contact of the rise-up relay, the collector is connected to the collector of the ignition terminal detection transistor, and the emitter is the movable contact of the wiper fixed-position stop switch. The relay is connected to the first relay normally closed contact of the intermittent relay, and even after the ignition terminal detecting transistor is turned off, Wiper device, characterized in that it comprises a second relay holding transistors continue to turn on the relay coil of the up relay. 3. A wiper switch having a fifth switch terminal connected to the second switch terminal when switched to the cleaning position, one brush terminal connected to a power source, and the other brush terminal connected to the wiper switch. The wiper device according to claim 2, further comprising a washer pump connected to the fifth switch terminal and the intermittent drive signal generation circuit.