JPH09272405A - Wiper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiper in which the operating noise of the wiper blade is reduced for preventing the impairment of comfortableness by reducing the impact force caused by the inertial force at the time of reversing action of the wiper blade. SOLUTION: A wiper 1 is provided with a control circuit 4 by which while a wiper switch 6 is changed over to a low-speed mode, when the wiper blade 9 reaches directly before a first reversing position, and when the wiper blade 9 reaches directly before a second reversing position, the supply current to the brushes 2b, 2c of a wiper motor 2 can be cut 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 for wiping a wiping surface with a wiper blade.

[0002]

2. Description of the Related Art As a wiper device for wiping a surface to be wiped by a wiper blade, there is known a wiper motor armature coupled to a wiper shaft via a link and a wiper blade coupled to the wiper shaft. When power is supplied to the brush of the wiper motor and the armature rotates, the rotation of the armature is converted into the reciprocating rotation of the wiper shaft by the link, so that the wiper blade connected to the wiper shaft has the first and second wiper surfaces. Invert at the reversing position, and perform a swinging motion to wipe the wiping surface.

[0003]

In the above-mentioned wiper device, when the wiper blade is reversed at the first and second reverse positions, a reaction force against the inertial force is generated, so that an impact force is generated. There is a problem that the operating noise of the wiper becomes large due to the impact, and there is a problem of reducing the operating noise of the wiper.

[0004]

SUMMARY OF THE INVENTION The wiper device according to the present invention reduces the operating noise of the wiper blade and reduces the comfortability by reducing the impact force generated against the inertial force when the wiper blade is reversed. It is an object of the present invention to provide a wiper device that does not have the above.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided a wiper device including an armature for driving a wiper blade, a brush arranged so that the armature can be energized, and an energization via the brush is performed. A wiper blade that can be swung between a first reversal position and a second reversal position on the wiping surface by rotating the wiper blade, a wiper switch that can be switched to a stop mode, a low speed mode, and a high speed mode, and a wiper motor. Electrically connected to the wiper fixed position detection switch and the wiper fixed position detection switch that is connected to the armature of the wiper blade and detects that the wiper blade has reached just before the first reverse position or just before the second reverse position. While the wiper switch is connected and the wiper switch is switched to the low speed mode, Brush of the wiper motor when it is detected that the wiper blade has arrived just before the first reversal position and when the wiper fixed position detection switch has detected that the wiper blade has arrived just before the second reversal position. It is characterized in that it is configured to include a control circuit capable of interrupting the supply of current to the circuit for a predetermined time.

A wiper device according to a second aspect of the present invention includes an armature for driving a wiper blade, a second brush electrically connected to a power source, and a second brush electrically connected to a wiper switch. Is arranged so that it can be energized to the armature, and the armature rotates due to the energization via the first and second brushes, and the wiper blade is wiped between the first reversal position and the second reversal position on the wiping surface. A swingable wiper motor, a wiper switch that can be switched to each of a stop mode, an intermittent mode, a low speed mode, and a high speed mode, and first, second, and third contact plates that are connected to the armature of the wiper motor and rotate together with the armature. Be prepared,
The first, second, and third contactors arranged on the first, second, and third contact plates are provided, and when the wiper blade reaches immediately before the first reversal position, the second contact plate is contacted with the second contact plate. When the wiper blade reaches immediately before the second reversal position, the first contact is made when the wiper blade reaches the first position.
Is electrically connected to the wiper fixed-position detection switch in which the first, second, and third contactors are electrically connected to the contact plate, and the first, second, third contactor, and wiper switch of the wiper fixed-position detection switch. , While the wiper switch is switched to the low speed mode, when only the second and third contactors of the wiper fixed position detecting switch are conducted, and the first contact plate of the wiper fixed position detecting switch When the first, second, and third contactors are all turned on, the supply of current to the first and second brushes of the wiper motor can be interrupted for a predetermined first time, and the wiper switch While the switch is switched to the intermittent mode, only the second and third contactors are connected to the second contact plate of the wiper fixed position detection switch. At this time, the current supply to the first and second brushes of the wiper motor can be interrupted only for the first time, and the first contact plate of the wiper fixed position detection switch conducts the first, second and third contactors. When
The present invention is characterized in that the wiper motor is provided with a control circuit capable of interrupting the current supply to the first and second brushes for a predetermined second time longer than the first time.

In this case, when the wiper switch is switched to the low speed mode or the intermittent mode and the armature of the wiper motor is rotated by energization through the first and second brushes, the wiper blade swings toward the first reverse position. Then
When the wiper blade reaches just before the first inverted position,
Only the second and third contactors are electrically connected to the second contact plate of the wiper fixed position detection switch, and the control circuit gives the wiper motor a first down time. When the first rest time ends, the armature of the wiper motor resumes rotation, the wiper blade swings toward the second reversal position, and when the wiper blade reaches just before the second reversal position, the control circuit causes The supply of current to the brush of the wiper motor is cut off for a predetermined time. Therefore, in the wiper motor, while the wiper switch is switched to the low speed mode or the intermittent mode, the current supply is cut off immediately before the wiper blade reaches the both-inversion position, so that the wiper blade temporarily stops, After that, since it is restarted, it is not necessary to generate a large reaction force that opposes the inertial force at both reversal positions.

In the wiper device according to the third aspect of the present invention, the control circuit is electrically connected to the first contactor of the wiper position stop switch, and the first contactor is the first contactor.
Is electrically connected to the retracted position detection circuit that is activated when the contactor is electrically connected to the second contactor, and the third contactor of the wiper fixed position detection switch.
The stop position detection circuit that operates when the contactor of FIG. 2 is conducted to the second contactor on the second contact plate, the intermittent mode detection circuit that operates when the wiper switch is switched to the intermittent mode, and the wiper switch The low-speed mode detection circuit that operates when switched to the low-speed mode, the drive signal timer generation circuit that forms an energization path for the wiper motor by the operation, and the stop position detection circuit that operates while the low-speed mode detection circuit is operating At this time, the drive signal timer generation circuit is deactivated for a predetermined first pause time, while the drive signal timer generation circuit is deactivated for the first pause time when the storage stop position detection circuit is activated. Then, while the intermittent mode detection circuit is operating, when the stop position detection circuit is activated, the drive signal timer is used for the first pause time. A drive signal timer is generated at a second pause time that is arbitrarily selected when the storage stop position detection circuit operates while the pause circuit timer circuit that operates the live circuit and the intermittent mode detection circuit are operating. It is characterized in that the circuit is provided with an intermittent downtime timer circuit that makes the circuit inoperative.

In this case, while the wiper switch is switched to the low speed mode and the low speed mode detection circuit is operating, the armature of the wiper motor is rotated by the energization via the first and second brushes, so that the wiper blade moves to the first position. When the stop position detection circuit is actuated by oscillating toward the inversion position of 1, and the wiper blade reaches immediately before the first inversion position, the first down time predetermined by the down time timer circuit. It is given to the wiper motor. First
When the resting time detection circuit is activated when the wiper motor armature resumes rotation and the wiper blade reaches immediately before the second reversal position when the rest time of The first rest time is provided to the wiper motor. And
While the wiper switch is switched to the intermittent mode and the intermittent mode detection circuit is operating, the armature of the wiper motor is rotated by energization via the first and second brushes, so that the wiper blade is directed to the first reverse position. When the stop position detection circuit is actuated by oscillating, the wiper blade reaches the position immediately before the first reversal position, the wiper motor is given a first down time predetermined by the down time timer circuit. When the first pause time ends, the armature of the wiper motor resumes rotation, and the wiper blade reaches immediately before the second reversal position to activate the storage stop position detection circuit. The wiper motor is provided with a second pause time selected selectively. Therefore, in the wiper motor, while the wiper switch is being switched to the low speed mode or the intermittent mode, the current supply is cut off immediately before the wiper blade reaches the both-inversion position, so that the wiper blade is temporarily stopped, After that, since it is restarted, it is not necessary to generate a large reaction force that opposes the inertial force at both reversal positions.

[0011]

In the wiper device according to the first aspect of the present invention, the wiper switch is switched to the low speed mode,
When the armature of the wiper motor rotates due to energization via the brush, the wiper blade swings toward the first reversal position, and when the wiper blade reaches immediately before the first reversal position, the control circuit causes a current to the brush of the wiper motor. Is shut off for a predetermined time. Then, when the interruption time ends, the armature of the wiper motor resumes rotation, the wiper blade swings toward the second reversal position, and when the wiper blade reaches immediately before the second reversal position, the wiper motor is intermittently moved. The amplifier gives the down time. Therefore, the wiper motor
While the wiper switch is switched to the low speed mode,
The current supply is cut off immediately before the wiper blade reaches the both inversion positions, so that the wiper blade stops temporarily and restarts after the elapse of a predetermined time. It is not necessary to generate a large counter force.

Also in the wiper device according to claims 2 and 3 of the present invention, similarly to claim 1, in the wiper motor, while the wiper switch is switched to the low speed mode, the wiper blade is in the reverse position. The current supply is cut off immediately before reaching, and the wiper blade stops temporarily and restarts after the elapse of a predetermined time.Therefore, at the both reversal positions, a large reaction force against the inertial force is generated. No need to occur.

[0013]

1 and 2 show an embodiment of a wiper device according to the present invention.

The wiper device 1 shown in FIG. 1 includes a wiper motor 2, a wiper fixed position detection switch 3, a control circuit (hereinafter referred to as a wiper amplifier) 4, a washer pump 5,
It comprises a wiper switch 6, a wiper arm 10 and a wiper blade 9.

In the wiper motor 2, two brushes, a first brush 2b and a second brush 2c capable of energizing the armature 2a, face a commutator (not shown) provided in the armature 2a, and the brush is attached to the commutator. The first brush 2b is arranged so as to be able to be energized, the first brush 2b is connected to a power source 60, and the second brush 2c is a sixth brush provided on a wiper switch 6 described later.
Connected to terminal 36.

An armature shaft 2d provided on the armature 2a of the wiper motor 2 is connected to a wiper shaft 8 via a link 7. The wiper shaft 8 is rotatably arranged in the vicinity of the wiping surface 70, and the wiper arm 10 having the wiper blade 9 attached thereto is coupled to the wiper shaft 8. Therefore, the wiper motor 2 is moved from the first brush 2b to the second brush 2c. When the armature 2a rotates by being energized,
The rotation of the armature shaft 2d is converted into the reciprocating rotation of the wiper shaft 8 via the link 7, and the wiper blade 9 is pressed against the wiping surface 70 by the arm spring (not shown) incorporated in the wiper arm 10 while the wiper blade 9 is in the lower reversal position (first position). Two
It is reciprocally swung between an inversion position A) and an upper inversion position (first inversion position) B. The armature shaft 2d of the wiper motor 2 is connected to a rotating plate 3g provided in the wiper fixed position detection switch 3.

The wiper fixed position detection switch 3 includes a first contact plate 3a and a second contact plate 3a.
b, a third contact plate 3c, a first contactor 3d, a second contactor 3e, and a third contactor 3f.

The first, second and third contact plates 3a, 3b and 3c of the wiper fixed position detection switch 3 are arranged on the rotary plate 3g so as to be insulated from each other.
The rotating plate 3g has its center coupled to the armature shaft 2d of the wiper motor 2 and rotates together with the armature shaft 3d.

The first contact plate 3a of the wiper fixed position detection switch 3 has a conductive region formed in a substantially fan shape, and the third contact plate 3 formed in a bobbin shape.
The third contact plate 3 is provided in one of the recessed regions of c.
It is arranged insulated from c. The conduction region of the first contact plate 3a extends outward from the recessed region of the third contact plate 3c.

The second contact plate 3b of the wiper fixed position detection switch 3 is the first contact plate 3a.
In the same manner as the above, it has a conductive region formed in a substantially fan shape, and is arranged to be insulated from the third contact plate 3c in the other concave region of the third contact plate 3c. The conduction region of the second contact plate 3b also extends outward from the recessed region of the third contact plate 3c, but has a smaller amount of protrusion than the first contact plate 3a.

The third contact plate 3c of the wiper fixed position detection switch 3 is formed in a pincushion shape by cutting two conductive circular plates facing each other into a rectangular shape, and electrically. It is grounded.

On the first, second and third contact plates 3a, 3b and 3c of the wiper fixed position detection switch 3, the first, second and third contactors 3d are provided independently of the rotary plate 3g. 3e and 3f are arranged.

Since the first contactor 3d of the wiper fixed position detection switch 3 is arranged near the outer circumference of the rotary plate 3g, only the first contact plate 3a is electrically connected when the rotary plate 3g rotates. It is connectable. The first contactor 3d is connected to a second stop position detection signal input terminal P2 provided in the wiper amplifier 4 described later.

Since the second contactor 3e of the wiper fixed position detection switch 3 is arranged inside the first contactor 3d on the rotating plate 3g, when the rotating plate 3g rotates, the first contact plate 3g is rotated. 3a or the second contact plate 3b can be electrically connected. The second contactor 3e is connected to a power source 60 and a power source terminal B provided in the wiper amplifier 4 described later, respectively.

Since the third contactor 3f of the wiper fixed position detection switch 3 is arranged inside the second contactor 3e on the rotating plate 3g, when the rotating plate 3g rotates, the first contact plate 3f. 3a, second contact plate 3b or third contact plate 3c
It can be electrically connected to any one of the above. Third
The contactor 3f is connected to a first stop position detection signal input terminal P1 provided in the wiper amplifier 4 described later.

The wiper fixed position detection switch 3 is
As shown in FIG. 1, at the position of the rotating plate 3g when the wiper blade 9 is in the lower reversal position A, the first, second, and third contactors 3d and 3d are attached to the first contact plate 3a.
Since e and 3f are electrically connected to each other, the first contact plate 3a electrically connects the first, second, and third contactors 3d, 3e, and 3f. Also,
Rotating plate 3 when wiper blade 9 is in upper inverted position B
At the position of g, the second and third contactors 3e and 3f are electrically connected to the second contact plate 3b, so that the second contact plate 3b allows the second and third contactors 3e and 3f to be electrically connected.
When only the third contactors 3e and 3f are conducted and the wiper blade 8 is neither in the lower reversal position A nor in the upper reversal position B, the third contactor 3f is connected to the third contact plate 3c, The third contactor 3f is grounded.

At this time, the first contact plate 3a of the wiper fixed position detection switch 3 has the first, second and third contactors 3d, 3e and 3f immediately before the wiper blade 9 reaches the lower reversal position A. The second contact plate 3b has an electrically connectable conduction range, and the second contact plate 3b is provided with the second and third contact plates immediately before the wiper blade 9 reaches the upper reversal position B.
The contactors 3e and 3f have a conduction range in which they can be electrically connected.

The wiper switch 6 is provided with a first terminal 31, a second terminal 32, a third terminal 33, a fourth terminal 34, a fifth terminal 35 and a sixth terminal 36, and a variable resistor VR1. Is provided, and the wiper switch 6 is switched to each of a stop (OFF) mode, an intermittent (INT) mode, a low speed (LO) mode, a high speed (HI) mode, and a cleaning (WA) mode. The variable resistor VR1 is selected to have an appropriate resistance value when the wiper switch 6 is switched to the intermittent (INT) mode.

When the wiper switch 6 is switched to the stop (OFF) mode, the fifth terminal 35 and the sixth terminal 36 are electrically connected, and when the wiper switch 6 is switched to the intermittent (INT) mode, the first
The terminal 31 and the third terminal 33 are electrically connected, and the fifth terminal 35 and the sixth terminal 36 are electrically connected,
When switched to the low speed (LO) mode, the first terminal 31 and the fourth terminal 34 are electrically connected and the fifth terminal 3
When the fifth and sixth terminals 36 are electrically connected and switched to the high speed (HI) mode, the first terminal 31 and the seventh terminal 37 are electrically connected and switched to the washing (WA) mode,
The first terminal 31 and the second terminal 32 are electrically connected.

In the wiper switch 6, the first terminal 31 is grounded, the second terminal 32 is connected to the second brush terminal 5b provided in the washer pump 5, and the third terminal 33 is provided in the wiper amplifier 4 described later. Connected to the intermittent mode detection terminal INT, the fourth terminal 34 is connected to a low speed mode detection terminal LO included in the wiper amplifier 4 described below, and the fifth terminal 35 is a relay terminal included in the wiper amplifier 4 described below. As described above, the sixth terminal 36 is connected to M, the second brush 2c of the wiper motor 2 is connected, and the variable resistor VR1 is connected to the variable input terminal VR provided in the wiper amplifier 4 described later. The first brush terminal 5 a provided on the washer pump 5 is connected to the power supply 60. In the washer pump 5, an armature shaft 5c provided in an armature (not shown) is connected to the pump, and this pump is connected in communication with the washer tank storing the cleaning liquid. Therefore, the first brush terminal 5a to the second brush terminal The cleaning liquid stored in the washer tank is jetted toward the wiping surface 70 from a nozzle (not shown) by being activated by energizing 5b.

On the other hand, the wiper amplifier 4 includes a switching relay RL1, resistors R1, R2, R3, R4, R5 and R.
6, R7, R8, a capacitor C1, and a control means 41. The control means 41 includes a switching transistor TR1, a power supply circuit 42, and a storage stop position detection circuit 4.
3, stop position detection circuit 44, intermittent mode detection circuit (INTS
W detection circuit) 45, low speed mode detection circuit (LO SW detection circuit) 46, first wiping signal generation circuit 47, constant voltage generation circuit 48, volume current conversion circuit 49, intermittent pause time calculation circuit 50, intermittent pause time timer circuit 51 A pause time timer circuit 52, a drive signal timer generation circuit 53, a first AND circuit AND1, a second AND circuit AND2, a third AND circuit AND3, a fourth AND circuit AND4, a first NOR circuit NOR1, a 2 NOR circuit NOR2, 3rd NOR circuit NOR3, 4th NOR circuit NOR4, 1st inverter INV1, 2nd inverter INV2, 3rd inverter INV3, 4th inverter INV4, 5th inverter INV5, 6th inverter INV6, 7th
Inverter INV7 is provided. The first NOR circuit NOR1 and the second NOR circuit NOR2 form a flip-flop.

The wiper amplifier 4 has a power supply terminal B,
A first stop position detection terminal P1, a second stop position detection terminal P2, a relay terminal M, an intermittent mode detection terminal INT, a low speed mode detection terminal LO, a variable input terminal VR, and a ground terminal E are provided. As described above, each terminal has the power supply terminal B connected to the power supply 60 and the first stop position detection terminal P.
1 is the third contactor 3 of the wiper fixed position detection switch 3
f, the second stop position detection signal input terminal P2 is connected to the first contactor 3d of the wiper fixed position detection switch 3, and the relay terminal M is connected to the fifth terminal 35 of the wiper switch 6 in the intermittent mode. The detection terminal INT is connected to the third terminal 33 of the wiper switch 6, the low speed mode detection terminal LO is connected to the fourth terminal 34 of the wiper switch 6, and the variable input terminal VR is grounded via the variable resistor VR1. The ground terminal E is grounded.

Switching relay RL of wiper amplifier 4
1, one end of the relay coil RL1-1 has a power supply terminal B
, The other end is connected to the collector of the switching transistor TR1, the normally closed contacts RL1-2 are connected to the first stop position detection terminal P1, the movable contacts RL1-3 are connected to the relay terminal M, and are normally opened. The contacts RL1-4 are grounded.

In the switching relay RL1, when the switching transistor TR1 is turned on, the movable contact RL1-3 is separated from the normally closed contact RL1-2 and connected to the normally open contact RL1-4, so that the relay terminal M is grounded. It has a function to

The power supply circuit 42 of the wiper amplifier 4 is connected to one end of a capacitor C1 whose other end is grounded, and has a resistor R1.
Is connected to one end of a power supply terminal B and a relay coil RL1-1 provided in the switching relay RL1 via, and a power supply terminal B is connected to the power supply 60 by turning on an ignition switch (not shown), When turned on, the control means 41 is turned on, and the constant voltage generation circuit 48 generates a predetermined constant voltage.

Storage stop position detection circuit 4 of wiper amplifier 4
Reference numeral 3 is a circuit for detecting that the wiper blade 9 has arrived just before the lower reversal position A, and is a second circuit through the resistor R2.
The voltage level of the stop position detection terminal P2 is applied to one input,
A fourth AND circuit AND in which the voltage level of the first stop position detection terminal P1 via the resistor R3 is applied to the other input
Since the output of No. 4 is input, the wiper blade 8 reaches immediately before the lower reversal position A, so that the first contactor 3d (second stop position detection terminal P2) of the wiper fixed position detection switch 3 becomes the first contactor. Is connected to the second contactor 3e (power source 60) on the contact plate 3a of
Third contactor 3f of wiper fixed position detection switch 3
When the (first stop position detection terminal P1) is connected to the second contactor 3e (power source 60) on the first contact plate 3a, the fourth AND circuit AND4 generates the output signal (1). Activated by the output signal (1)
Occurs.

The output signal (1) generated by the storage stop position detection circuit 43 is supplied to the first AND circuit AND1 and the second AND circuit AND2 via the fifth inverter INV5.
It is applied to the third AND circuit AND3, respectively.

Stop position detection circuit 44 of wiper amplifier 4
Is a circuit that detects that the wiper blade 9 has arrived just before the upper reversal position B, and the voltage of the first stop position detection terminal P1 is input via the resistor R3. The third contactor 3 of the wiper fixed position detection switch 3 is reached by reaching just before the position A.
When f is connected to the second contactor 3e on the first contact plate 3a and when the wiper blade 8 reaches immediately before the upper reversal position B, the third contactor 3f of the wiper fixed position detection switch 3 is moved to the third contactor 3f. When the second contactor 3e is connected to the second contact plate 3b, the first stop position detection terminal P1
Becomes high level to generate an output signal (1), which gives the output signal (1) to the first AND circuit AND1 and also to the third NOR circuit NOR3 via the sixth inverter INV6. The output signal (1) is given. Here, when the wiper blade 8 reaches the upper inverted position B, the stop position detection circuit 44 generates an output signal (1), but the storage stop position detection circuit 43 does not generate an output signal (1). The output signal of the first NOR circuit NOR1 is the second
NOR circuit NOR2 of the second NOR circuit NOR of
The output signal of the second NOR circuit NOR1 is supplied to the first NOR circuit NOR1 and the output signal of the second NOR circuit NOR2 is supplied to the seventh inverter I.
It is given to the switching transistor TR1 via NV7.

Intermittent mode detection circuit (I
NT SW detection circuit) 45 is a circuit for detecting that the wiper switch 6 is switched to the intermittent mode,
Voltage of power supply terminal B through resistance R4 and resistance R6, resistance R
Since the voltage of the intermittent mode detecting terminal INT via 6 is input, the wiper switch 6 is switched to the intermittent mode (INT), and the third terminal 33 of the wiper switch 6 is grounded to operate. The output signal (1) is given to the first NOR circuit NOR1 via the first inverter INV1 and the output signal (1) is given to the third AND circuit AND3 via the third inverter INV3.

Low speed mode detection circuit (L
OW SW detection circuit) 46 is a circuit for detecting that the wiper switch 6 is switched to the low speed mode,
Since the voltage of the low speed mode detection terminal LO and the voltage level of the power supply terminal B via the resistance R5 and the resistance R7 are input via the resistor R7, the wiper switch 6 is set to the low speed mode (L
O), the fourth terminal 34 of the wiper switch 6
Is operated by grounding the second inverter I
The output signal (1) is given to the first NOR circuit NOR1 via NV2, and the output signal (1) is given to the second AND circuit AND2 via the fourth inverter INV4.

Output signal (1) of the intermittent mode detection circuit 45
And the first NOR circuit NOR1 to which the output signal (1) of the low speed mode detection circuit 46 is given, is either the output signal (1) of the intermittent mode detection circuit 45 or the output signal (1) of the low speed mode detection circuit 46. If there is, an output signal (1) is generated, and the generated output signal (1) is the first AND circuit A.
The first wiping signal generation circuit 4 is applied to ND1.
7 given.

First wiping signal generation circuit 4 of wiper amplifier 4
7 indicates when the wiper switch 6 is switched to the intermittent mode (INT) and the third terminal 33 of the wiper switch 6 is grounded, or when the wiper switch 6 is switched to the low speed mode (LO). The output signal (1) is generated only when one of the switches is turned on when the four terminals 34 are grounded, and the drive signal timer generation circuit 53 described later is generated.
To the output signal (1). First wiping signal generation circuit 47
The output signal (1) of (1) is a predetermined time (0.
In 3 seconds), the drive signal timer generating circuit 53 is timed up.

The second AND circuit AND2 outputs either the storage stop position detection circuit 43 or the low speed mode detection circuit 46 via the fourth inverter INV4 (1).
Is given to generate an output signal (1), and the generated output signal (1) is given to a second OR circuit 2 described later.

The output signal of the second AND circuit AND2 and the first AND circuit AND2 are connected to the second OR circuit OR2.
Since the output signal of 1 is given, the second AND circuit AN
Output signal (2) of D2 and first AND circuit AND1
Output signal (1) if any of the output signals (1)
Occurs. The output signal (1) of the second OR circuit OR2 is given to the pause time timer circuit 52.

The third AND circuit AND3 generates the output signal (1) by receiving the output signal (1) from both the storage stop position detecting circuit 43 and the intermittent mode detecting circuit 45, and the generated output signal. (1) is given to the intermittent pause time timer circuit 51 described later.

The constant voltage generating circuit 48 of the wiper amplifier 4 is
The voltage level given by the power supply circuit 42 is set to the variable resistor V
Converted to a constant voltage for generating a reference current level for R1. The constant voltage generated by the constant voltage generation circuit 48 is given to the volume current conversion circuit 49.

The volume current conversion circuit 49 of the wiper amplifier 4 converts the voltage level applied to the variable input terminal VR via the resistor R8 into a value (current level) selected by the variable resistor VR1 and generates it. . The current level by the variable resistor VR1 generated by the volume current conversion circuit 49 is given to the intermittent pause time calculation circuit 50.

Intermittent pause time calculation circuit 5 for wiper amplifier 4
0 has a plurality of reference currents based on the constant voltage generated by the volume current conversion circuit 49, and a matching circuit (not shown) converts the reference currents to the volume current conversion circuit 48.
Is compared with the output signal (current level) generated by to determine whether or not the output signal (current level) selected by the variable resistor VR1 exceeds any of the reference currents, and corresponds to the determined reference current. The pause time signal (having the second pause time) is supplied to the intermittent pause time timer circuit 51.

The intermittent pause time timer circuit 51 of the wiper amplifier 4 is a timer having a clock pulse, and when the wiper switch 6 is switched to the intermittent mode (INT), the output signal (1 of the third AND circuit AND3 ) To start an intermittent drive output signal having an intermittent pause output signal (0) and a drive output signal (1) based on the signal given by the intermittent pause time calculation circuit 50. The intermittent drive output signal of the intermittent pause time timer circuit 51 is given to the drive signal timer generation circuit 53.

Quiet time timer circuit 52 of wiper amplifier 4
Is a circuit for temporarily stopping the wiper blade 9 at the upper reversal position B when the wiper blade 9 reaches immediately before the upper reversal position B, and is a timer having a clock pulse. When the wiper switch 6 is switched to the low speed mode (LO) or the intermittent mode (INT), the wiper blade 8 reaches immediately before the upper reversal position B, so that the third contactor of the wiper fixed position detection switch 3 is reached. 3f is connected to the second contactor 3e on the second contact plate 3b, the stop position detection circuit 44 generates an output signal (1), and the first contactor 3d of the wiper fixed position detection switch 3 is in a floating state. Is in a state,
The pause time timer circuit 52 is activated by the first AND circuit AND1 generating the output signal (1). By operating the pause time timer circuit 52, a predetermined timer time (pause time) (first pause time)
It has the function of deactivating the drive signal timer generation circuit 53 for only (0.2 seconds). Then, when the predetermined time (0.2 seconds) elapses in the pause time timer circuit 52, the time is up, so that the drive signal timer generation circuit 53 becomes operable.

As described above, the drive signal timer generating circuit 53 of the wiper amplifier 4 outputs the output signal for the predetermined time (0.3 seconds) when the output signal (1) generated by the first wiping signal generating circuit 47 is present. It has a timer function that cuts off the output signal after (high level) is generated. Also,
The drive signal timer generation circuit 53 has a function of cutting off the output signal corresponding to the timer time (0.2 seconds) of the pause time timer circuit 52 without the output signal (1) from the first wiping signal generation circuit 47. , Intermittent pause time timer circuit 51
The intermittent drive output signal having the intermittent pause output signal (0) and the drive output signal (1) given by the above is generated, while the temporary pause output signal is generated by the output signal of the pause time timer circuit 52. Since the output signal of the drive signal timer generating circuit 53 is given to the second NOR circuit NOR2, when the output signal of the second NOR circuit NOR2 is low level,
The output signal of the inverter INV7 becomes high level,
The switching transistor TR1 is turned on.

Since the switching transistor TR1 of the wiper amplifier 4 has the emitter grounded and the collector is connected to the other end of the relay coil RL1-1 provided in the switching relay RL1, the switching transistor TR1 is turned on as described above. The relay coil RL1-1 is turned on, the movable contact RL1-3 of the switching relay RL1 is separated from the first stop position detection terminal P1, and the relay terminal M is grounded.

In the wiper device 1 having such a structure, when the wiper blade 9 is stopped at the lower reversal position A and the wiper is not in use, the rotary plate 3g of the wiper fixed position detecting switch 3 has the upper side in FIG. In the position of the first
The first, second, and third contactors 3d, 3e, and 3f are connected to the contact plate 3a.

Then, an ignition switch (not shown) is turned on, so that the power supply terminal B is turned on.
When it is connected to 0, the power supply circuit 42 turns on and the control means 4
1 is turned on, and the constant voltage generating circuit 48 generates a predetermined constant voltage. Then, when the wiper switch 6 is switched from the stop mode to the intermittent mode, the first terminal 31 and the third terminal 33 of the wiper switch 6 are connected and the fifth terminal 35 and the sixth terminal 36 are connected.

By connecting the first terminal 31 of the wiper switch 6 to the third terminal 33, the intermittent mode detecting terminal INT of the wiper amplifier 4 is grounded, and the fifth terminal 35 and the sixth terminal 36 of the wiper switch 6 are connected. Is connected, the relay terminal M of the wiper amplifier 4 is connected to the second brush 2c of the wiper motor 2, so that the intermittent mode detection circuit 45 operates via the resistor R6 of the wiper amplifier 4 to output the output signal (1). Is applied to the first OR circuit OR1 to activate the first wiping signal generation circuit 47, and the drive signal timer generation circuit 53 generates an output signal (high level) for a predetermined time (for example, 0.3 seconds). , The switching transistor TR1 is turned on, and the switching relay R
The relay coil RL1-1 of L1 is turned on, and the movable contact RL1-3 of the switching relay RL1 is normally open contact RL1-.
4 is grounded and the relay terminal M of the wiper amplifier 4 is grounded, whereby the armature 2a of the wiper motor 2 starts rotating. As the armature 2a rotates, the rotation of the armature shaft 2d causes the link 7 to rotate.
The wiper shaft 9 is converted into reciprocating rotation via the wiper blade 8, and the wiper blade 9 is wiped from the lower reversal position A toward the upper reversal position B while being pressed against the wiping surface 70 by an arm spring (not shown) incorporated in the wiper arm 10. Start.

In the drive signal timer generation circuit 53, the output signal becomes low level after a predetermined time (for example, 0.3 seconds) elapses, but the armature 2a starts to rotate and the wiper fixed position detection switch 3 rotates. Since the plate 3g also rotates counterclockwise in FIG. 1, the first and second contactors 3
d and 3e are separated from the first contact plate 3a and become non-conductive, the third contactor 3f is connected to the third contact plate 3c, and the first stop position detection signal input terminal P1 of the wiper amplifier 4 is grounded. By
The second brush 2c of the wiper motor 2 and the wiper switch 6
The sixth terminal 36, the switching relay RL1, and the first stop position detection signal input terminal P1 of the wiper amplifier 4 cause a current to flow through the wiper motor 2 and the armature 2a.
Is rotated, the wiper blade 9 continues to wipe toward the upper inverted position B.

When the wiper blade 9 reaches just before the upper reversal position B, the rotary plate 3 of the wiper fixed position detection switch 3 is reached.
g indicates that the second contact plate 3b is at the upper position in FIG. 1, the second and third contactors 3e and 3f are conducted on the second contact plate 3b, and the third contactor 3f is connected to the power supply 60. Therefore, the first stop position detection signal input terminal P1 of the wiper amplifier 4 becomes high level, and the second brush 2c of the wiper motor 2, the sixth terminal 36 of the wiper switch 6, and the fifth terminal 3 of the wiper switch 6 are generated.
5, switching relay RL1, first wiper amplifier 4
The path of the stop position detection signal input terminal P1 forms an armature short circuit with respect to the armature 2a of the wiper motor 2, and the armature 2a is electromagnetically braked.
The rotation of the wiper blade stops the wiper blade 9 at the upper reversal position B.

At this time, the first stop position detection signal input terminal P1 of the wiper amplifier 4 changes to the wiper fixed position detection switch 3
Third contactor 3f, second contact plate 3 of
b, since it is connected to the power supply 60 via the second contactor 3e, the stop position detection circuit 44 operates, and the second stop position detection signal input terminal P2 of the wiper amplifier 4 is in the floating state. The output signal (1) of the fifth inverter INV5, the stop position detection circuit 44, and the first OR circuit OR1 is given to any input of the AND circuit AND1, and the second OR circuit OR2 outputs the output signal (1 ), The pause time timer circuit 53 operates. Since the pause time timer circuit 53 has a function of deactivating the drive signal timer generation circuit 53 for a predetermined timer time (first pause time) (0.2 seconds), the switching transistor TR1 is a wiper. When the blade 9 is in the upper reversal position B, it remains off for a predetermined timer time, during which the armature 9 does not rotate.

When the rest time timer circuit 53 times up, the drive signal timer generation circuit 53 operates, so that the switching transistor TR1 is turned on, the relay coil RL1-1 of the switching relay RL1 is turned on, and the movable contacts RL1-3 are turned on. Since the relay terminal M of the wiper amplifier 4 is connected to the normally open contacts RL1-4 and the relay terminal M is grounded, the armature 2a of the wiper motor 2 starts rotating again, and the armature 2a rotates, whereby the wiper blade 9
Starts wiping from the upper reversal position B toward the lower reversal position A.

As the armature 2a rotates, the rotary plate 3g of the wiper fixed position detection switch 3 also rotates, and when the wiper blade 9 reaches immediately before the lower reversal position A, the first contact plate 3a moves upward in FIG. , The first, second, and third contactors 3d, 3e,
Since 3f is electrically connected to each other on the first contact plate 3a, in the wiper amplifier 4, the first stop position detection signal input terminal P1 becomes high level and the stop position detection circuit 4
4 operates, but the second stop position detection signal input terminal P2
Also becomes high level and the storage stop position detection circuit 43 operates, so that the first AND circuit AND1 outputs the output signal (0).
And an output signal (1) is output from the third AND circuit AND3.
Occurs. As a result, the intermittent pause time timer circuit 51 operates, is selected by the variable resistor VR1, and the intermittent drive output signal corresponding to the intermittent pause time signal generated by the intermittent pause time calculation circuit 50 is sent to the drive signal timer generation circuit 53. Therefore, during the intermittent rest time (second rest time) corresponding to the resistance value of the variable resistor VR1, the switching transistor TR1 is turned off, the armature 9 stops rotating, and the wiper blade 9 is once in the lower reversal position A. Stop.
When the intermittent down time ends, the switching transistor T
Since R1 is turned on, the relay coil RL1-1 of the switching relay RL1 is turned on, whereby the armature 9 starts rotating and the wiper blade 9 starts wiping from the lower reversal position A toward the upper reversal position B. This operation is repeated while the wiper switch 6 is in the intermittent mode (INT).

As described above, when the wiper switch 6 is switched to the intermittent mode (INT), the wiper blade 9 starts the wiping operation from the lower reversal position A to the upper reversal position B.
The current supply to the wiper motor 2 is cut off when the wiper motor 2 is reached immediately before, so that the wiper blade 9 operates at the upper reversal position B for a time (first down time) predetermined by the intermittent down time timer circuit 51. And then the wiper blade 9 wipes toward the lower reversal position A, and when the wiper blade 9 reaches immediately before the lower reversal position A, the intermittent rest time (second rest time) selected by the variable resistor VR1. The current supply to the wiper motor 2 is cut off, the wiper blade 9 stops at the lower reversal position A, and after the intermittent down time ends, the wiper blade 9
The operation of wiping toward the upper reversal position B is repeated. The second rest time is selected longer than the first rest time.

On the other hand, when the wiper switch 6 is switched from the stop mode to the intermittent mode, the first wiper switch 6
The terminal 31 and the fourth terminal 34 are connected, and the fifth terminal 35 and the sixth terminal 36 are connected.

By connecting the first terminal 31 of the wiper switch 6 to the fourth terminal 34, the low-speed mode detection terminal LO of the wiper amplifier 4 is grounded, and the fifth terminal 35 and the sixth terminal of the wiper switch 6 are connected. Since the relay terminal M of the wiper amplifier 4 is connected to the second brush 2c of the wiper motor 2 by connecting 36, the low speed mode detection circuit 46 operates via the resistor R7 of the wiper amplifier 4 and the output signal (1 ) Is given to the first NOR circuit NOR1 to activate the first wiping signal generation circuit 47, and the drive signal timer generation circuit 53 sets a predetermined time (for example, 0.3).
The output signal (high level) is generated only for (seconds). As a result, the switching transistor TR1 is turned on, the relay coil RL1-1 of the switching relay RL1 is turned on, the movable contact RL1-3 of the switching relay RL1 is connected to the normally open contact RL1-4 and grounded, and the relay of the wiper amplifier 4 is relayed. Since the terminal M is grounded, the wiper motor 2
The armature 2a starts rotating. Armature 2
By rotating a, the rotation of the armature shaft 2d is converted into the reciprocating rotation of the wiper shaft 8 via the link 7,
The wiper blade 9 starts wiping from the lower reversal position A toward the upper reversal position B while being pressed against the wiping surface 70 by an arm spring (not shown) incorporated in the wiper arm 10.

When the armature 2a starts rotating and a predetermined time (for example, 0.3 seconds) elapses, the output signal of the drive signal timer generating circuit 53 becomes low level,
Since the rotating plate 3g of the wiper fixed position detection switch 3 also rotates counterclockwise in FIG. 1, the first and second contactors 3d,
3e separates from the first contact plate 3a and becomes non-conductive, the third contactor 3f is connected to the third contact plate 3c, and the first stop position detection signal input terminal P1 of the wiper amplifier 4 is grounded. , The second brush 2c of the wiper motor 2, the sixth terminal 36 of the wiper switch 6, the switching relay RL1, and the first stop position detection signal input terminal P1 of the wiper amplifier 4, a current is supplied to the wiper motor 2 and the armature 2
By rotating a, the wiper blade 9 continues to wipe toward the upper inverted position B.

When the wiper blade 9 reaches just before the upper reversal position B, the rotary plate 3 of the wiper fixed position detection switch 3 is reached.
g indicates that the second contact plate 3b is at the upper position in FIG. 1, the second and third contactors 3e and 3f are conducted on the second contact plate 3b, and the third contactor 3f is connected to the power supply 60. Therefore, the first stop position detection signal input terminal P1 of the wiper amplifier 4 becomes high level, and the second brush 2c of the wiper motor 2, the sixth terminal 36 of the wiper switch 6, and the fifth terminal 3 of the wiper switch 6 are generated.
5, switching relay RL1, first wiper amplifier 4
Since the armature short circuit for the armature 2a is formed by the path of the stop position detection signal input terminal P1, the electromagnetic brake stops the rotation of the armature 2a and the wiper blade 9 stops at the upper reversal position B.

At this time, the first stop position detection signal input terminal P1 of the wiper amplifier 4 changes to the wiper fixed position detection switch 3
Third contactor 3f, second contact plate 3 of
b, since it is connected to the power supply 60 via the second contactor 3e, the stop position detection circuit 44 operates, and the second stop position detection signal input terminal P2 of the wiper amplifier 4 is in the floating state. The output signal (1) of the fifth inverter INV5, the stop position detection circuit 44, and the first OR circuit OR1 is given to any input of the AND circuit AND1, and the second OR circuit OR2 outputs the output signal (1 ), The pause timer circuit 52 is activated. Since the quiescent time timer circuit 52 has a function of deactivating the drive signal timer generating circuit 52 for a predetermined timer time (first quiescent time) (0.2 seconds), the switching transistor TR1 is a wiper. When the blade 9 is in the upper reversal position B, it remains off for a predetermined timer time, during which the armature 9 does not rotate.

When the rest time timer circuit 52 times up, the drive signal timer generation circuit 53 operates, so that the switching transistor TR1 is turned on, the relay coil RL1-1 of the switching relay RL1 is turned on, and the movable contacts RL1-3 are turned on. Since the relay terminal M of the wiper amplifier 4 is connected to the normally open contacts RL1-4 and the wiper motor 4 is grounded, a current flows through the wiper motor 2, the armature 2a starts rotating, and the armature 2a rotates, so that the wiper blade 9 moves upward. Wiping is started from the reversal position B toward the lower reversal position A.

As the armature 2a rotates, the rotary plate 3g of the wiper fixed position detection switch 3 also rotates, and when the wiper blade 9 reaches immediately before the lower reversal position A, the first contact plate 3a moves upward in FIG. , The first, second, and third contactors 3d, 3e,
Since 3f is conducted on the first contact plate 3a, in the wiper amplifier 4, the first stop position detection signal input terminal P1 becomes high level and the stop position detection circuit 44 operates, but the second stop position detection is performed. Since the signal input terminal P2 also becomes high level and the storage stop position detection circuit 43 operates, the first AND circuit AND1 generates the output signal (0), but the second AND circuit AND2 outputs the output signal (1 ) Is generated, and the second OR circuit OR2 generates the output signal (1). As a result, the pause time timer circuit 52 operates, and a predetermined timer time (first pause time) (0.2 seconds)
In order to make the drive signal timer generation circuit 53 inoperative,
The switching transistor TR1 is the wiper blade 9
Keeps turning off for a predetermined timer time from when it reached just before the lower reversal position A, and during that time, the armature 2
Since a does not rotate, the wiper blade 9 stops at the lower reversal position A.

When the idle time timer circuit 52 times up while the wiper blade 9 reaches the lower reversal position A, the drive signal timer generating circuit 53 operates,
The switching transistor TR1 is turned on, the relay coil RL1-1 of the switching relay RL1 is turned on, the movable contact RL1-3 is connected to the normally open contact RL1-4, and the relay terminal M of the wiper amplifier 4 is grounded. While the armature 2a starts rotating and the armature 2a rotates, the wiper blade 9 starts wiping from the lower reversal position A toward the upper reversal position B, and the wiper switch 6 is in the low speed mode (LO). Is
This operation is repeated.

As described above, when the wiper switch 6 is switched to the low speed mode (LO), when the wiper blade 9 starts the wiping operation from the lower reversal position A and reaches immediately before the upper reversal position B, the upper reversal position is reversed. At the position B, the wiper blade 9 stops operating for a predetermined time (first pause time) by the pause time timer circuit 52, and thereafter, the wiper blade 9 wipes toward the lower reversal position A, and the lower reversal is performed. When the wiper blade 9 arrives immediately before the position A, the wiper blade 9 stops operating for a predetermined time (second down time) by the intermittent down time timer circuit 51,
The operation of wiping toward the upper reversal position B is repeated.

When the wiper switch 6 is switched to the high speed mode (HI), the sixth terminal 36 of the wiper switch 6 becomes the first
It is grounded through the terminal 31.

Since the sixth terminal 36 of the wiper switch 6 is grounded through the first terminal 31, the second brush 2c of the wiper motor 2 is grounded, so that the current of the power supply 60 does not pass through the wiper amplifier 4 and the wiper motor 2 The armature 2a of the wiper motor 2 starts to rotate and the armature 2a rotates, so that the wiper blade 9 starts wiping from the lower reversal position A toward the upper reversal position B and reverses at the upper reversal position B. Then, a reciprocating operation is performed in which the lower reversal position A is wiped, the lower reversal position A is reversed, and the upper reversal position B is wiped. This operation is repeated while the wiper switch 6 is in the high speed mode (HI).

When the wiper switch 6 is switched to the stop mode (OFF), the sixth terminal 36 of the wiper switch 6 is connected to the fifth terminal 35.

Since the sixth terminal 36 of the wiper switch 6 is connected to the fifth terminal 35, the third contactor 3f of the wiper fixed position stop switch 3 is operated until the wiper blade 9 reaches the lower reversal reversal position A. By being connected to the third contact plate 3c and grounding the first stop position detection signal input terminal P1 of the wiper amplifier 4, current is continuously supplied to the wiper motor 2 and the wiper blade 9
When the wiper blade 9 reaches the lower reversal position A, the armature short circuit is formed for the armature 2a, and the armature 2a suddenly stops rotating, so that the wiper blade 9 stops at the upper reversal position B. It will be done.

[0075]

As described above, according to the wiper device according to the first aspect of the present invention, when the wiper switch is switched to the low speed mode and the armature of the wiper motor is rotated by energization via the brush, the wiper blade is rotated. Oscillates toward the first reversal position, and when the wiper blade reaches immediately before the first reversal position, the control circuit cuts off the supply of current to the brush of the wiper motor for a predetermined time. Then, when the cutoff time ends, the armature of the wiper motor resumes rotation, the wiper blade swings toward the second reversal position, and when the wiper blade reaches immediately before the second reversal position, the wiper motor is wiped against the wiper amplifier. Since the pause time is given from the, the wiper motor stops the current supply immediately before the wiper blade reaches the reverse position while the wiper switch is in the low speed mode, so that the wiper blade stops temporarily. However, since it restarts after a lapse of a predetermined time, it is not necessary to generate a large reaction force against the inertial force at both inversion positions, which reduces the operating noise of the wiper blade and improves comfort. It has the excellent effect of not impairing

Also in the wiper device according to claims 2 and 3 of the present invention, similarly to claim 1, in the wiper motor, while the wiper switch is being switched to the low speed mode, the wiper blade is in the both reversing positions. The current supply is cut off immediately before reaching, and the wiper blade stops temporarily and restarts after the elapse of a predetermined time.Therefore, at the both reversal positions, a large reaction force against the inertial force is generated. It is not necessary to generate the noise, and thereby the operating noise of the wiper blade is reduced, and the excellent effect of not impairing the comfort is exhibited.

[Brief description of drawings]

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

FIG. 2 is a circuit configuration diagram of a wiper amplifier used in the wiper device shown in FIG.

[Explanation of symbols]

 1 wiper device 2 wiper motor 2a armature 2b brush 2c brush 3 wiper fixed position detection switch 3a first contact plate 3b second contact plate 3c third contact plate 3d first contactor 3e second contactor 3f third contactor 4 Wiper amplifier (control circuit) 6 Wiper switch 9 Wiper blade 43 Storage position detection circuit 44 Stop position detection circuit 45 Intermittent mode detection circuit 46 Low speed mode detection circuit 53 Drive signal timer generation circuit 51 Intermittent pause time timer circuit 52 Pause time timer circuit 60 Power supply

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Takao 1760, Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Automotive Electric Industry Co., Ltd. (72) Inventor Ken Kasezawa 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Within Nissan Motor Co., Ltd.

Claims (3)

[Claims] 1. A first armature provided with an armature for driving a wiper blade, a brush disposed so that the armature can be energized, and rotated by energization through the brush to rotate the wiper blade on the wiping surface. Of the wiper motor, which can be swung between the reverse position and the second reverse position, a wiper switch which can be switched to each of a stop mode, a low speed mode and a high speed mode, and the wiper blade which is connected to the armature of the wiper motor, Of the wiper fixed position detection switch for detecting that the wiper fixed position detection switch for detecting that the wiper fixed position detection switch has arrived just before the second reverse position or immediately before the second reverse position, and the wiper switch is electrically connected to the wiper switch in the low speed mode. While the wiper blade is being switched to the When it is detected that the wiper blade has arrived just before the turning position and when the wiper fixed position detection switch has detected that the wiper blade has arrived just before the second reversal position, the current is supplied to the brush of the wiper motor. A wiper device comprising a control circuit capable of interrupting only a predetermined time. 2. An armature for driving a wiper blade is provided, and a first brush connected to a power source and a second brush electrically connected to a wiper switch are arranged so that the armature can be energized. And a wiper motor capable of swinging the wiper blade between the first reversal position and the second reversal position on the wiping surface by the rotation of the armature by energization through the first and second brushes. A stop mode, an intermittent mode, a low speed mode and a high speed mode, and a wiper switch, and first, second and third contact plates that are coupled to the armature of the wiper motor and rotate together with the armature. , The first, second, and third contactors arranged on the first, second, and third contact plates, respectively. When the wiper blade reaches immediately before the first inversion position, the second and third contactors are electrically connected to the second contact plate, and when the wiper blade reaches immediately before the second inversion position, the first contact plate contacts the first contact plate. A wiper fixed position detection switch in which the first, second and third contactors are conducted, and a wiper fixed position detection switch electrically connected to the first, second and third contactors of the wiper fixed position detection switch and the wiper switch. While the switch is being switched to the low speed mode, only the second and third contactors of the wiper fixed position detecting switch are conducted to the second contact plate and the first contact plate of the wiper fixed position detecting switch. When the first, second and third contactors are all turned on, the current is supplied to the first and second brushes of the wiper motor. Only the second and third contactors can be attached to the second contact plate of the wiper fixed position detection switch while the wiper switch can be shut off for a first predetermined time and while the wiper switch is switched to the intermittent mode. When energized, the supply of current to the first and second brushes of the wiper motor can be interrupted for a first time, and the first contact plate of the wiper fixed position detection switch is provided with the first, second and third brushes. When the contactor is turned on, the first current is supplied to the first and second brushes of the wiper motor.
A wiper device comprising a control circuit that can be shut off for a predetermined second time longer than the time. 3. The control circuit is electrically connected to the first contactor of the wiper position stop switch, and is activated when the first contactor is conducted to the second contactor on the first contact plate. Which is electrically connected to the storage position detection circuit and the third contactor of the wiper fixed position detection switch, and which operates when the third contactor is conducted to the second contactor on the second contact plate. The position detection circuit, the intermittent mode detection circuit that operates when the wiper switch is switched to the intermittent mode, the low speed mode detection circuit that operates when the wiper switch is switched to the low speed mode, and the energization path to the wiper motor While the drive signal timer generation circuit to be formed and the low speed mode detection circuit are operating, when the stop position detection circuit operates The drive signal timer generation circuit is deactivated during a predetermined first pause time, while the drive signal timer generation circuit is deactivated during the first pause time when the storage stop position detection circuit is activated. An idle time timer circuit that is in an operating state and that makes the drive signal timer generation circuit inactive during the first idle time when the stop position detection circuit operates while the intermittent mode detection circuit is operating; An intermittent pause time during which the drive signal timer generating circuit is deactivated during a second pause time arbitrarily selected when the storage stop position detection circuit is activated while the intermittent mode detection circuit is activated. The wiper device according to claim 2, further comprising a timer circuit.