JPH0999814A - Wiper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper device capable of continuously operating a wiper to a preset stop position and moving it to a storage position to be stopped, without stopping on a wiped surface even when an ignition switch is off during operation. SOLUTION: A wiper device 1 consists of self holding circuits TR3, RL3 connected to an ignition terminal 20 and a relay holding transistor TR1, an intermittent relay RL1, an ignition terminal detecting transistor TR2, a rise-up relay RL2 and an intermittent drive signal generation circuit IC by which a wire blade 10 can be operated from a lower reverse position B to a storage position C with a current from the self holding circuits TR3, RL3 when an ignition switch 21 is off.

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.
An object of the present invention is to provide a wiper device in which the wiper does not stop on the wiping surface by operating the wiper until the wiper reaches a predetermined stop position and further reaches the retracted position.

[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 is reversely rotated by the 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 supply through the self-holding circuit, and a grounded first contact. A wiper blade having a contact, the movable contact being connected to the first contact when the wiper blade is not in the lower reversal position, and the movable contact being connected to the second contact when the wiper blade is in the lower reversal position. A position stop switch and a self-holding circuit that is connected to the ignition terminal and turns on when the potential of the power supply is applied to the ignition terminal and holds the ON state by itself, and an intermittent drive signal generation circuit that generates an intermittent drive signal when turned on. And the intermittent drive signal generation circuit, and the intermittent drive signal generation circuit is intermittently turned on by the drive signal generated through the intermittent down time, and is connected to the self-holding circuit and the wiper switch to self-hold When the circuit 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. An ignition terminal detection transistor and an ignition terminal detection transistor are connected. Is connected to the self-holding circuit and is wiped while the self-holding circuit is on. A rise-up relay that switches the current direction of the power supply supplied to the first brush terminal and the second brush terminal of the wiper motor according to the switching position of the position stop switch, and a transistor for ignition terminal detection connected to the rise-up relay and connected to the rise-up relay Even after being turned off, the rise-up relay is provided while the movable contact of the wiper fixed-position stop switch is connected to the first contact and until the movable contact is disconnected from the state of being connected to the first contact. It is characterized in that it is configured to include a relay holding transistor for holding ON.

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 second relay normally open contact provided in the intermittent drive signal generating circuit and the rise-up relay, and the grounded first contact, and the wiper blade is not in the lower reversal position. And a movable contact is connected to the first contact, and when the wiper blade is in the lower reversal position, the movable contact is connected to the second contact, and a wiper fixed position stop switch,
An intermittent drive signal generation circuit that generates an intermittent drive signal when turned on, a third relay movable contact connected to the ignition terminal, and a third relay connected to one end of a first relay coil provided in the intermittent relay. It has a normally open contact and a third relay coil, one end of which is connected to the third relay normally open contact and the other end of which is connected to the collector of the third self-holding transistor. A self-retaining relay that turns on when applied, and turns off when no power supply potential is applied to the ignition terminal, and the base has a second movable relay contact for the rise-up relay and a wiper fixed-position stop switch. It is connected in parallel to the movable contact and the ignition terminal, and any one of the second relay movable contact, the movable contact of the wiper fixed position stop switch, and the ignition terminal has a high level. , A grounded emitter self-holding transistor, a first relay coil whose other end is connected to the intermittent drive signal generating circuit, and a first relay movable contact connected to the third switch terminal of the wiper switch. And a first relay normally-closed contact connected to the movable contact of the wiper fixed-position stop switch and the intermittent drive signal generation circuit,
An intermittent relay that has a first relay normally open contact that is grounded and that turns on in synchronization with the turning on of the self-holding transistor; and a base that is connected to the ignition terminal and a collector that is the third of the self-holding relay. It is connected to the other end of the relay coil and the intermittent drive signal generation circuit, the emitter is connected to the first switch terminal of the wiper switch, the ignition switch is in the ON state, and the wiper switch is in the intermittent position to turn ON, Ignition terminal detection transistor that turns on the intermittent drive signal generation circuit while turning on the rise-up relay, and a third terminal that is a self-holding relay at one end
Second relay coil connected to the other end of the second relay coil and second relay coil connected to the first brush terminal of the wiper motor
Third relay movable contact, a grounded second relay normally-closed contact, and a second relay normally-open contact connected to one end of the second relay coil. While the coil is on, the rise-up relay that switches the current direction of the power supply 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 the base rise It is connected to the second relay movable contact of the up relay, the collector is connected to the collector of the ignition terminal detection transistor, and 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. Is
Even after the ignition terminal detection transistor is turned off, until the movable contact of the wiper fixed position stop switch is connected to the first contact and until the movable contact is disconnected from the state of being connected to the first contact. It is characterized in that it is configured to include a relay holding transistor that keeps the second relay coil of the rise-up relay continuously turned on.

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 the ignition terminal, 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, when the ignition switch is turned on, the self-holding circuit is turned on. In this state, when the wiper switch is switched to the intermittent position, the ignition terminal is detected. The transistor turns on, the rise relay turns on, and 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 operate for an intermittent down time. Wipe the wiping surface through. 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 rotates in the reverse direction, and when the wiper blade reaches the storage position below the lower reversal position, the output shaft of the wiper motor stops and the self-holding circuit Turns off. 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 turned on,
The self-holding transistor is turned on, the third relay coil of the self-holding relay is turned on, and power is supplied to the power supply line. In this state, when the wiper switch is switched to the intermittent position, the ignition terminal detecting transistor is turned on, and the rise-up relay is turned on by forming an energizing path in the second relay coil. The drive signal generated causes the intermittent relay to turn on due to the energization path being formed in the first relay coil, the output shaft of the wiper motor to rotate forward, and the wiper blade wipes the wiping surface through the intermittent pause 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. 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 self-holding circuit is turned off to stop. 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 ignition switch is turned on,
When the self-holding transistor is turned on, the third relay coil of the self-holding relay is turned on, power is supplied to the power supply line, and the wiper switch is switched to the cleaning position, the washer pump operates and the cleaning liquid is wiped off. To spray.
When the wiper switch is switched to the intermittent position after the ignition switch is switched on, the ignition terminal detecting transistor is switched on, and the rise-up relay is switched on due to the formation of an energization path in the second relay coil, causing an intermittent operation. The drive signal generated by the drive signal generation circuit causes the intermittent relay to turn on due to the formation of an energizing path in the first relay coil, the output shaft of the wiper motor to rotate in the forward direction, and the wiper blade passes through the intermittent pause time. And 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 self-holding circuit is turned off to stop. 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 20, an ignition switch 21, a wiper switch 2, and a wiper fixed position stop switch 3.
A wiper motor 4, a washer pump 5, and a control circuit 6, which are included in the control circuit 6. The control circuit 6 includes an intermittent drive signal generation circuit IC and a relay holding transistor.
Switching transistor TR1, a first switching relay RL1 that is an intermittent relay, a second switching transistor TR2 that is an ignition terminal detection transistor, a second switching relay RL2 that is a rise-up relay, and a self-holding transistor Three
Switching transistor TR3, a third switching relay RL3 that is a self-holding relay, and resistors R1 and R
2, R3, R4, R5, R6, R7, R8, R9, R1
0, R11, R12, R13, R14, R15, R1
6, R17, diodes D1, D2, D3, D4, D
5, D6, D7, D8, D9, Zener diode ZD
1, ZD2, capacitors C1, C2, C3, C4, C
5, C6 and C7 are provided respectively.

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 included in the control circuit 6, and a third switch terminal S is connected to a second terminal (ground terminal) 6c included in the control circuit 6,
The 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 fifth 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 sixth 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 seventh 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 of 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 second contact 3c are connected 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 via the ignition switch 21, 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 power supply 50 via the ignition switch 21 and also connected to the eighth terminal 6h provided in the control circuit 6, and the power supply 50 is connected.
Is connected to a ninth terminal 6i 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
Is connected to the sixth terminal 6d of the control circuit 6 via 11 and a third relay normally open contact RL3- provided in a third switching relay RL3 described later via a charging resistor R10 of the capacitor C6. The wiper switch 2 is connected to No. 3, and when the wiper switch 2 is switched to the cleaning position, it becomes a low level and recognizes the washer operation. On the contrary, when the wiper switch 2 in the cleaning position is switched to the stop position, it becomes a high level. Invert.

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 fourth terminal 6d of the control circuit 6 via the resistors R9 and R10. 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 R10. .

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 via the current limiting resistor R4 and the sixth 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
The first relay coil RL1-1 included in the first switching relay RL1 and the second relay coil RL2-1 of the second switching relay RL2 via the diode D2.
Is connected to the first switching coil RL1-1 and the second switching relay RL2 of the first switching relay RL1 by outputting a low level.
By turning on the second relay coil RL2-1 and outputting a high level, both switching relays RL1,
The relay coils RL1-1 and RL2-1 of RL2 are turned off. Zener diode D1 is the first relay coil RL1
It has a function of protecting the output circuit of the intermittent drive signal generation circuit IC from the counter electromotive force of -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.
Of the intermittent drive signal generating circuit IC via the anode of the diode D2, the emitter of which is the anode of the diode D3, and the control circuit 6
It is connected to the movable contact 3a of the wiper fixed position stop switch 3 via the sixth terminal 6e.

Further, the first switching transistor T
R1 is a second switching relay R whose base will be described later.
Since it is connected to the second relay movable contact RL2-2 provided in L2, this second relay movable contact RL2-2 is connected to the second relay normally open contact RL2-4 on the power supply side and the emitter If the movable contact 3a of the wiper fixed-position stop switch 3 connected to is connected to the first contact 3b on the ground side, the wiper fixed-position stop switch 3 turns on.
When the movable contact 3a is connected to the second contact 3c on the power source side, the movable contact 3a 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 3 of the wiper fixed position stop switch 3 is turned on.
The second relay coil RL2-1 is turned on when a is connected to the first contact 3b on the ground side.
After being turned on by turning on, the second switching transistor TR2 continues to be turned on even if the second switching transistor TR2 is turned off to continuously form the ground path of the second relay coil RL2-1.
It has a function of continuing to turn on the 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 eighth terminal 6h of the control circuit 6 via the resistor R12, the collector is connected via the diode D4, The second relay coil RL2-1 of the second switching relay RL2 is connected to the fifth terminal 6g of the control circuit 6 via the resistor R9 and the port 2 of the intermittent drive signal generating circuit IC via the resistor R8.

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 switching relay RL2 is cut off, but the first switching transistor TR described above is cut off.
1 continues to turn on the second 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 seventh 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 third terminal 6c of the control circuit 6, and the first relay normally closed contact RL1-3 is connected to one end of the capacitor C2 and the resistor R4 of the intermittent drive signal generating circuit IC. It is connected to the port 6 and the sixth terminal 6f of the control circuit 6, 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 its port 7 outputs a low level, thereby the first relay RL1. The coil RL1-1 turns on, and the first relay movable contact RL
By grounding 1-2, the second terminal of the wiper motor 4 is connected via the third terminal 6c of the control circuit 6, the third switch terminal S of the wiper switch 2, and the fourth switch terminal L of the wiper switch 2. The brush terminal 4b is grounded, and on the contrary, when the port 7 of the intermittent drive signal generating circuit IC outputs a high level, the brush terminal 4b is turned off, and the ground path of the second brush terminal 4b of the wiper motor 4 is switched to the wiper fixed position stop switch 3. Entrust to.

The second switching relay RL2 has a second
One end of the relay coil RL2-1 is connected to the second relay normally open contact RL2-4 and the seventh terminal 6g of the control circuit 6, respectively, and the other end of the second relay coil RL2-1 is connected via the diode D4. Second switching transistor TR
Second relay movable contact RL2 connected to the second collector
-2 is connected to the base of the first switching transistor TR1 and the fifth terminal 6e of the control circuit 6 via the resistor R1, and the second relay normally closed contact RL2-3 is grounded.

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 being connected to L2-4, the function of turning on the first switching transistor TR1 and the ignition switch 21 being turned off when the wiper switch 2 is switched to the intermittent position, the second switching transistor TR2 is turned off. Even when is turned off, the function of forming a circuit similar to that in which the second relay coil RL2-1 is continuously turned on by turning on the first switching transistor TR1 and the wiper switch 2 is switched to the stop position. With.

On the other hand, the third switching relay RL3 is provided with a third relay coil RL3-1, a third relay movable contact RL3-2, and a third relay normally open contact RL3-3.

The third switching relay RL3 has a third
Of the relay coil RL3-1 is connected to the cathode of the diode D8 whose anode is connected to the third relay normally open contact RL3-3 and the anode is connected to the cathode of the diode D9 connected to the eighth terminal 6h of the control circuit 6. And the third
The other end of the relay coil RL3-1 is connected to the collector of a third switching transistor TR3 described later, the third relay movable contact RL3-2 is connected to the ninth terminal 6i of the control circuit 6, and the third relay The normally open contact RL3-3 is connected to the seventh terminal 6g of the control circuit 6.

Third switching transistor TR3
Has its base connected via a resistor R16 to the cathode of a diode D7 whose anode is connected to the eighth terminal 6h of the control circuit 6, and at the same time the sixth terminal 6 of the control circuit 6 is
The fifth terminal 6 of the control circuit 6 is connected to the cathode of the diode D6 whose anode is connected to f through the resistor R15.
The cathode of a diode D5 whose anode is connected to e is connected via a resistor R14, is connected to an emitter via a resistor R17, and the collector is connected to the third relay coil RL3- of the third switching relay RL3 as described above. 1
Is connected to the other end and the emitter is grounded.

The above-mentioned diodes D5, D6 and D7 are
Fifth terminal 6e of control circuit 6 connected to first brush terminal 4a of wiper motor 4, wiper fixed position stop switch 3
Terminal 6 of the control circuit 6 connected to the movable contact 3a of the
g, one of the eighth terminals 6h of the control circuit 6 connected to the ignition terminal 20 is at a high level to form an OR logic circuit for turning on the third switching transistor TR3. Therefore, the third switching transistor TR3 includes the first brush terminal 4a of the wiper motor 4, the movable contact 3a of the wiper fixed position stop switch 3,
If any of the ignition terminals 20 is at a high level, the third relay coil RL3-1 of the third switching relay RL3 is turned on to turn on the third relay movable contact RL.
Even if the ignition switch 21 is switched off while the wiper switch 2 is still in the intermittent position by connecting the 3-2 to the third relay normally open contact RL3-3, the second relay of the second switching relay RL2. The coil RL2-1 has a function of self-holding in order to continue forming an energization path.

In the wiper device 1 having such a structure, when the wiper blade 10 is in the storage position C and the wiper switch 2 is switched to the stop position, the ignition switch 21 is switched on and the power supply is turned on. 50, the eighth terminal 6h of the control circuit 6, the diode D7, and the resistor R16 to supply the base current.
Switching transistor TR3 of turns on, and power supply 5
0, the eighth terminal 6h of the control circuit 6, the diode D9, the third
Switching relay RL3 of the third relay coil RL
3-1, the third switching transistor TR3 (ON), and the third relay coil RL3-1 of the third switching relay RL3 are turned on by the energization path of the ground to be in the self-holding state, so that the third switching relay RL
The third relay movable contact RL3-2 of No. 3 is connected to the third relay normally open contact RL3-3, the second contact 3c of the wiper fixed-position stop switch 3, and the second switching relay RL.
The potential of the power supply 50 is applied to one end of the second relay coil RL2-1 and the second relay normally open contact RL2-4. At this time, since the second switching transistor TR2 is not turned on and the other end of the second relay coil RL2-1 is not grounded, the second relay coil RL2 does not turn on and enters the standby state.

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 source 50, the ninth terminal 6i 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 fifth 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, sixth terminal 6f of control circuit 6, movable contact 3 of wiper fixed position stop switch 3
A, a first contact point 3b, and a grounding energization path are formed, so that the output shaft 4c of the wiper motor 4 starts to rotate forward.

When the output shaft 4c of the wiper motor 4 rotates in the forward direction, the wiper blade 10 wipes the wiping surface 9 from the retracted position C through the lower reversal position B toward the upper reversal position A, and at the upper reversal position A. Invert and 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 switched to the low level and the intermittent drive signal generating circuit IC is switched.
Starts the intermittent operation, the wiper blade 10 reverses at the upper reversal position A and reaches the lower reversal position B, and when the first wiping ends, the movable contact 3a of the wiper fixed position stop switch 3 becomes the second contact 3c. Since the connection is made and the energization path is cut off, the output shaft 4c of the wiper motor 4 stops rotating, and the wiper blade 10 after the initial wiping is stopped at the lower reversal position B enters the intermittent rest time and intermittent drive. The port 7 of the signal generating circuit IC becomes high level, and the first relay coil RL1-1 of the first switching relay RL1 is turned off.

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 rest time ends, the port 7 of the intermittent drive signal generating 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. Since the first relay movable contact RL1-2 is connected to the first relay normally open contact RL1-4, the power source 50 and the ninth terminal 6 of the control circuit 6 are connected.
i, the second relay normally open contact RL2-4 of the second switching relay RL2, the second relay movable contact RL2-2,
Fifth terminal 6e of control circuit 6, first brush terminal 4a of wiper motor 4, second brush terminal 4 of wiper motor 4
b, fourth switch terminal L of wiper switch 2, third switch terminal S of wiper switch 2, third control circuit 6
Terminal 6c, first relay movable contact RL1-2 of first switching relay RL1, first relay normally open contact RL1
-4, the grounded energization path is formed, the output shaft 4c of the wiper motor 4 resumes normal rotation, and the wiper blade 10 starts the wiping operation from the lower reversal position B 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. When turned off, the first relay movable contact RL1-2 is connected to the first relay normally closed contact RL1-3, and the wiper blade 10 is located between the upper reversal position A and the lower reversal position B. Since the movable contact 3a of the position stop switch 3 is connected to the first contact 3b, the power source 50, the ninth terminal 6i 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
Fifth 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 third terminal 6c of the control circuit 6, and the first switching relay RL1. First relay movable contact RL1-2, first relay normally closed contact RL1-3, sixth terminal 6f of control circuit 6, movable contact 3a of wiper fixed position stop switch 3, first contact 3b, grounding Since the path is formed and the energization path of the wiper motor 4 continues to be formed,
The output shaft 4c continues to rotate forward, and the wiper blade 10 continuously wipes the wiping surface 9 toward the lower reversal position B.

When the wiper blade 10 reaches the lower reversal position B and the movable contact 3a of the wiper fixed position stop switch 3 is separated from the first contact 3b and connected to the second contact 3c, the first switching transistor The emitter potential of TR1 is connected to the power supply side, the first switching transistor TR1 is turned off, and the second switching relay R
Since L2 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 source 50, the ninth terminal 6i of the control circuit 6, and the third switching transistor TR3 are connected. Third relay movable contact RL3-
2, the third relay normally open contact RL3-3, the seventh terminal 6g of the control circuit 6, the second contact 3c of the wiper fixed position stop switch 3, the movable contact 3a, the sixth terminal 6f of the control circuit 6, the first
Switching relay RL1 of the first relay normally closed contact R
L1-3, first relay movable contact RL1-2, third terminal 6c of control circuit 6, third switch terminal S of wiper switch 2, fourth switch terminal L of wiper switch 2, second wiper motor 4 Brush terminal 4b, wiper motor 4
The first brush terminal 4a, the fifth terminal 6e of the control circuit 6,
The second relay movable contact RL2-2 of the second switching relay RL2, the second relay normally-closed contact RL2-3, the second terminal 6b of the control circuit 6, and the grounding energization path are formed, and the output shaft of the wiper motor 4 is formed. 4c rotates in the reverse direction, lower reverse position B
When the wiper blade 10 is moved 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 is connected to the first contact 3b. The energization path for the wiper motor 4 is cut off, and the wiper blade 10 is stored at the storage position C.
The output shaft 4c of the wiper motor 4 stops rotating in the state of being stored in.

Then, 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 in order 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 movable contact 3a of the wiper fixed position stop switch 3 is turned off. First contact 3a
Since the potential of the power supply 50 is not applied to the ignition terminal 20 in the state of being connected to, the port 7 of the intermittent drive signal generation circuit IC is at high level and the first switching transistor TR1 is off. Circuit 6
Although the base current to the third switching transistor TR3 via the eighth terminal 6h, the diode D7, and the resistor R16 is cut off, the power supply 50, the ninth terminal 6i of the control circuit 6, and the third switching in the ON state. The third relay movable contact RL3-2 of the relay RL3 and the third relay normally-open contact RL3- of the third switching relay RL3.
3, the second relay normally open contact RL2-2 of the second switching relay RL2 in the ON state, the second relay movable contact RL2-3 of the second switching relay RL2, the first brush terminal 4a 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 third terminal 6c of the control circuit 6, and the first switching relay RL1 in the off state. A base current is formed via the first relay movable contact RL1-2, the first relay normally-closed contact RL1-3, the diode D6, and the resistor R15, and the third switching relay TR3 continues to be turned on and the third Switching relay T
As R3 continues to be turned on, the third relay coil RL3-1 of the third switching relay RL3 keeps on and enters a self-holding state.

At the same time, since the base current via the resistor R1 is continuously supplied to the first switching transistor TR1, even if the second switching transistor TR2 is turned off, the first switching transistor TR1 is continuously turned on and the second switching transistor TR1 is turned on. The switching relay RL2 continues to turn on, forming the same circuit as when the wiper switch is switched from the intermittent position to the stop position while the ignition switch 21 is on.

Therefore, the output shaft 4c of the wiper motor 4 is
When the wiper blade 10 reaches the lower reversal position B, normal rotation continues until the movable contact 3a of the wiper fixed position stop switch 3 is connected from the first contact 3a to the second contact 3b.

When the wiper blade 10 reaches the lower reversal position B and the movable contact 3a of the wiper fixed position stop switch 3 is connected to the second contact 3c, the emitter potential of the first switching transistor TR1 changes. It is connected to the power supply side, the first switching transistor TR1 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. Therefore, the power source 50, the ninth terminal 6i of the control circuit 6, the third relay movable contact RL3-2 of the third switching transistor TR3, the third relay normally open contact RL3-3, and the seventh terminal 6g of the control circuit 6 are included. , The second contact 3c of the wiper fixed-position stop switch 3, the movable contact 3a, the sixth terminal 6f of the control circuit 6, the first of the first switching relay RL1. Relay normally closed contact RL1-3, first
Relay movable contact RL1-2, third terminal 6 of control circuit 6
c, the third switch terminal S of the wiper switch 2, the fourth switch terminal L of the wiper switch 2, the second brush terminal 4b of the wiper motor 4, the first brush terminal 4a of the wiper motor 4, the fifth of the control circuit 6. The terminal 6e, the second relay movable contact RL2-2 of the second switching relay RL2,
A second relay normally closed contact RL2-3, a second terminal 6b of the control circuit 6, and a grounding energization path 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 downward. It moves to the storage position C below the reversal position B.

When the wiper blade 10 reaches the retracted position C, the movable contact 3a of the wiper fixed-position stop switch 3 is connected to the first contact 3b, so that the energization path to the wiper motor 4 is cut off and the wiper blade 10 is removed. With the wiper motor 4 stored in the storage position C, the output shaft 4c
Stops spinning. At this time, the diode D6 and the resistor R
Since the base current to the third switching transistor TR3 via 15 is also cut off, the third relay coil RL3-1 of the third switching relay RL3 is cut off.
Is turned off, the third relay movable contact RL3-2 is cut off from the third relay normally open contact RL3-1, the self-holding state is released, and the state is restored.

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, and the third switching transistor TR3 for self-holding and the third switching relay RL3 are turned off. Become.

[0068]

As described above, according to the wiper device of the first aspect of the present invention, when the ignition switch is turned on, the self-holding circuit is turned on. In this state, the wiper switch is in the intermittent position. When the switch is switched to, the ignition terminal detection transistor turns on, the rise relay turns on, and the drive signal generated by the intermittent drive signal generation circuit turns on the intermittent relay, causing the output shaft of the wiper motor to rotate forward. 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 rotates in the reverse direction, and when the wiper blade reaches the storage position below the lower reversal position, the output shaft of the wiper motor stops and the self-holding circuit Turns off, so the ignition switch turns off while the wiper is operating. Even if the voltage of the power supply is no longer applied to the ignition terminal, the wiper does not stop on the wiping surface by operating the wiper until it reaches the predetermined stop position and further reaches the retracted position. Produce the effect.

According to the wiper device of the second aspect of the present invention, when the ignition switch is turned on,
The self-holding transistor is turned on, the third relay coil of the self-holding relay is turned on, and power is supplied to the power supply line. In this state, when the wiper switch is switched to the intermittent position, the ignition terminal detecting transistor is turned on, and the rise-up relay is turned on by forming an energizing path in the second relay coil. The drive signal generated causes the intermittent relay to turn on due to the energization path being formed in the first relay coil, the output shaft of the wiper motor to rotate forward, and the wiper blade wipes the wiping surface through the intermittent pause 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. 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 Since self-holding circuit is stopped is turned off, 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,
By operating the wiper until the wiper reaches the predetermined stop position and further reaches the retracted position, the wiper does not stop on the wiping surface.

According to the wiper device of the third aspect of the present invention, when the ignition switch is turned on,
When the self-holding transistor is turned on, the third relay coil of the self-holding relay is turned on, power is supplied to the power supply line, and the wiper switch is switched to the cleaning position, the washer pump operates and the cleaning liquid is wiped off. To spray.
When the wiper switch is switched to the intermittent position after the ignition switch is switched on, the ignition terminal detecting transistor is switched on, and the rise-up relay is switched on due to the formation of an energization path in the second relay coil, causing an intermittent operation. The drive signal generated by the drive signal generation circuit causes the intermittent relay to turn on due to the formation of an energizing path in the first relay coil, the output shaft of the wiper motor to rotate in the forward direction, and the wiper blade passes through the intermittent pause time. And 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 Stops and the self-holding circuit turns off, 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 reaches the specified stop position and the By activating the wiper until reaching, the excellent effect that the wiper does not stop on the wiping surface is achieved.

[Brief description of 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 Other brush terminal 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) First switching relay RL1- 1 1st relay coil RL1-2 1st relay movable contact RL1-3 1st relay normally closed contact RL1-4 1st relay normally open contact RL2 (rise up relay) 2nd switching relay RL2-1 Second relay coil RL2-2 second relay movable contact R 2-3 Second relay normally closed contact RL2-4 Second relay normally open contact RL3 (self-holding circuit) (self-holding relay) Third switching relay RL3-1 Third relay coil RL3-2 Third Relay movable contact RL3-3 Third relay normally open contact S Third switch terminal TR1 (relay holding transistor) First switching transistor TR2 (ignition terminal detection transistor) Second
Switching transistor TR3 (self-holding circuit) (self-holding transistor)
Third switching 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 and electrically connected to the wiper switch, a second contact connected to a power supply via a self-holding circuit, and a first grounded A wiper fixed position stop switch having a contact and a movable contact is connected to the first contact when the wiper 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. And a self-holding circuit which is connected to the ignition terminal and which turns on when a potential of a power source is applied to the ignition terminal and which holds itself in an on state, and an intermittent drive signal generating circuit which generates an intermittent drive signal when turned on. An intermittent relay that is connected to the intermittent drive signal generation circuit and is intermittently turned on by a drive signal generated by the intermittent drive signal generation circuit during an intermittent rest time; and is connected to the self-holding circuit and the wiper switch. If the self-holding circuit 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. , An ignition terminal detection transistor for turning on the rise-up relay, and the ignition terminal detection transistor and the self-holding circuit, and the wiper fixed position stop while the self-holding circuit is on. A rise-up relay that switches the direction of the current of the power supply supplied to the first brush terminal and the second brush terminal of the wiper motor corresponding to the switching position of the switch, and the ignition-terminal detecting transistor connected to the rise-up relay. Even after the switch is turned off, while the movable contact of the wiper fixed position stop switch is connected to the first contact and while the movable contact is disconnected from the state of being connected to the first contact, A relay holding transistor for holding ON of the rise-up relay is provided. Wiper device that. 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. 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, and the intermittent drive signal generation. The circuit has a second contact connected to the normally open contact of the second relay provided for the rise-up relay and a first contact grounded, and the movable contact has the first contact unless the wiper blade is in the lower reversal position. A wiper fixed position stop switch which is connected to the contact of the wiper blade and the movable contact is connected to the second contact when the wiper blade comes to the lower reversal position, an intermittent drive signal generation circuit which generates an intermittent drive signal when the wiper blade is turned on, and the ignition described above. A third relay movable contact connected to the terminal, a third relay normally open contact connected to one end of a first relay coil provided for the intermittent relay, and one end of the third relay It has a third relay coil connected to a normally open contact and the other end connected to the collector of a third self-holding transistor, and turns on when a potential of a power source is applied to the ignition terminal, and the ignition terminal is turned on. A self-holding relay that turns off when the potential of the power supply is not applied to the terminals, a base has a second relay movable contact provided in the rise-up relay, a movable contact provided in the wiper fixed-position stop switch,
A second relay movable contact connected in parallel to the ignition terminal, a movable contact of the wiper fixed-position stop switch, and a grounded-emitter self-holding transistor that is turned on when any of the ignition terminals is at a high level; Is a first relay coil connected to the intermittent drive signal generating circuit, a first relay movable contact connected to a third switch terminal of the wiper switch, a movable contact and an intermittent contact of the wiper fixed position stop switch. An intermittent relay having a first relay normally-closed contact connected to the drive signal generation circuit and a grounded first relay normally-open contact, and being turned on in synchronization with turning on of the self-holding transistor; The base is connected to the ignition terminal, and the collector is connected to the other end of the third relay coil of the self-holding relay and the intermittent drive signal generation circuit. When the emitter is connected to the first switch terminal of the wiper switch, 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. , An ignition terminal detection transistor for turning on the rise-up relay, a second relay coil whose one end is connected to the other end of the third relay coil of the self-holding relay, and a first brush terminal of the wiper motor A second relay movable contact, a second grounded normally closed relay contact, and a second normally open contact connected to one end of the second relay coil. While the third relay coil is on, 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 are provided.
The rise-up relay that switches the current direction of the power supply supplied to the brush terminal, 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 detecting transistor, and the emitter is The movable contact of the wiper fixed-position stop switch 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 the movable contact of the wiper fixed-position stop switch is the first contact even after the ignition terminal detection transistor is turned off. A relay holding transistor for continuing to turn on the second relay coil of the rise-up relay while the movable contact is connected to the first contact and is cut off from the state in which the movable contact is connected to the first contact. A wiper device characterized by being provided. 3. A wiper switch having a fifth switch terminal connected to a second switch terminal when switched to a cleaning position, one brush terminal connected to an ignition terminal 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 generating circuit.