JP2000127906A - Wiper driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the rain water adhered on both windshild and rear glasses simultaneously simply by operating a primary switch means. SOLUTION: This wiper driving device 1 comprises a front wiper switch FS, a rear wiper switch RS, and a print circuit board PC. Such elements as a transistor TR3, a capacitor C2, and a primary relay 12 are mounted on the print circuit board PC. By turning the front wiper switch FS from 'OFF' to 'INT' position, the transistor TR3 is turned on and a coil 12d of the primary relay 12 is energized, so that a moving contact 12c is connected to a ground side fixed contact 12a. Accordingly, since both front and rear wipers are driven, the rain water adhered on both windshild and rear glasses ca be removed simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper driving device.

[0002]

2. Description of the Related Art Conventionally, a vehicle is equipped with a wiper device for securing a visual field in running during rainfall. The wiper device includes a front wiper device having a front wiper and a rear wiper device having a rear wiper. The front wiper and the rear wiper are driven by independent drive circuits.

When removing rainwater or the like adhering to the windshield, a front wiper motor for driving the front wiper is controlled by operating a front wiper switch provided in the front wiper device.
The rainwater is removed by swinging the front wiper back and forth.

On the other hand, when removing rainwater or the like adhering to the rear glass, a rear wiper motor for driving the rear wiper is controlled by operating a rear wiper switch provided in the rear wiper device, and the rear wiper is reciprocated to swing. Etc. are removed.

[0005]

By the way, when rainwater or the like adheres to both the windshield and the rear glass after the rain has stopped, etc., the rainwater and the like adhered to the windshield and the rear glass before the operation are applied. It is necessary to remove both rainwater and the like that have adhered.

However, when removing both rainwater and the like adhering to the front glass and rainwater and the like adhering to the rear glass, it is necessary to operate both the front wiper switch and the rear wiper switch. Therefore, when removing both rainwater and the like adhering to the windshield and the rear water and the like adhering to the rear glass, it is necessary to perform the two switch operations described above. Particularly, in an emergency or the like, the operation is troublesome. was there.

An object of the present invention is to provide a wiper driving device capable of simultaneously removing both rain water and the like adhering to a windshield and rain water and the like adhering to a rear glass simply by operating a first switch means. is there.

[0008]

According to the first aspect of the present invention, a first mode in which the first drive source is not operated and a second mode in which the first drive source is operated are provided. A first switch means for electrically connecting a predetermined connection point among a plurality of connection points for each of the modes, and driving the front wiper when the first switch means is set to the second mode A first drive source comprising: a first switching unit that is turned on when the first switch unit is changed from the first mode to the second mode; and A first coil that is energized by being turned on and, when the first movable contact is connected to the first fixed contact when the first coil is energized, activates a second drive source that drives the rear wiper; Sa A first wiper driving device including a relay is set to its gist that.

According to a second aspect of the present invention, in the wiper driving device according to the first aspect, the first switching means includes:
Timer means for determining the ON time of the first switching means is electrically connected, and the gist is that the operation time of the second drive source for driving the rear wiper is determined by the timer means.

According to a third aspect of the present invention, in the wiper driving device according to the second aspect, the timer means includes a capacitor, and an ON time of the first switching means is determined by a capacitance of the capacitor, and The gist is that the operation time of the drive source is determined.

According to a fourth aspect of the present invention, in the wiper driving device according to any one of the first to third aspects, a third mode in which the second driving source is not operated and a fourth mode in which the second driving source is operated. And a second switch means for electrically switching and connecting a predetermined connection point among a plurality of connection points for each mode, wherein the first switch means switches the first mode from the first mode to the second mode. When the setting is changed to the second mode and the first switching means is turned on, the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. The gist is to short-circuit between predetermined connection points switched and connected by the first movable contact when the two-switch means is set to the fourth mode.

According to the first aspect of the present invention, when the setting of the first switch means is changed from the first mode to the second mode, the first drive source for driving the front wiper is operated,
The front wiper is driven.

On the other hand, when the setting of the first switch is changed from the first mode to the second mode, the first switching is turned on. Then, the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. As a result, the second drive source for driving the rear wiper is operated,
The rear wiper is driven.

According to the second aspect of the present invention, the ON time of the first switching means is determined by the timer means electrically connected to the first switching means. That is, the first switching means is turned on for the time determined by the timer means, during which the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. As a result, the second drive source that drives the rear wiper for the time determined by the timer means is operated, and the rear wiper is driven.

According to the third aspect of the present invention, the ON time of the first switching means is determined by the capacitance of the capacitor electrically connected to the first switching means. That is, the first switching means is turned on for a time determined by the capacitance of the capacitor, during which time the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. As a result, the second drive source that drives the rear wiper for a time determined by the capacitance of the capacitor is activated, and the rear wiper is driven.

According to the fourth aspect of the present invention, when the setting of the first switch is changed from the first mode to the second mode, the predetermined connection is switched and connected when the second switch is set to the fourth mode. The points are short-circuited by the first movable contact of the first relay. That is, when the setting of the first switch is changed from the first mode to the second mode, the second switch is set to the fourth mode, the second drive source is operated, and the rear wiper is driven. .

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an electric circuit diagram showing an example of a wiper driving device of an automobile having a front wiper and a rear wiper.

The table on the upper left side of FIG. 1 shows that the front wiper switch FS as the first switch means is in each position P
(OFF, INT, LO, HI) indicates the connection state of each terminal T. For example, when the front wiper switch FS is set to the “OFF” position as the first mode, the “+1” terminal and “+ SS”
The terminals are connected (conductive), and the “INT1” terminal, the “B1” terminal, and the “B2” terminal are connected (conductive).

When set to the "INT" position, the "+1" terminal is connected to the "+ SS" terminal, and the "INT1" terminal is connected to the "INT2" terminal. Further, when set to the “LO” position, the “+ BP” terminal and the “+1” terminal are connected, and “H”
When set to the "I" position, the "+ BP" terminal and the "+2" terminal are connected. In the present embodiment, “IN
The second mode is configured by the “T” position, the “LO” position, and the “HI” position.

The table on the upper right side of FIG. 1 shows that the rear wiper switch RS as the second switch means is at each position P
(WASH etc.) shows the connection state of each terminal T. This also indicates that when the rear wiper switch RS is set to each position, the two terminals indicated by the circles are connected, as in the table on the upper left side of FIG.

In the wiper driving device 1 shown in FIG. 1, a “+ B” terminal is connected to the battery power supply B via an ignition switch 2 and a fuse 3. "+ B"
A front wiper motor MF is provided between the terminal and the ground line. Front wiper motor M as first drive source
F is a DC motor for driving a front wiper of a vehicle (not shown).

The "LO" terminal of the front wiper motor MF is connected to the "+1" terminal. The “HI” terminal of the front wiper motor MF is connected to the “+2” terminal. The fixed contact 4a on the power supply side of the switch 4 built in the front wiper motor MF is connected to the "+ B" terminal. The ground-side fixed contact 4b of the switch 4 is connected to the ground-side “ME” terminal of the front wiper motor MF. The movable contact 4c of the switch 4 is connected to the "+ S" terminal.

The movable contact 4c is connected to the ground-side fixed contact 4b when the front wiper motor MF is stopped, and is connected to the power supply-side fixed contact 4a when the front wiper motor MF is driven. Is mechanically connected to a front wiper motor MF. More specifically, when the front wiper motor MF is rotating, the movable contact 4c is connected to the power supply fixed contact 4a, and when the front wiper motor MF is rotated once, the movable contact 4c is connected to the ground fixed contact 4b. ing.

The wiper driving device 1 is provided with a printed circuit board PC. The "+ BP" terminal of the printed circuit board PC is connected to the "+ B" terminal, and the "+ SM" terminal is connected to the "+ S" terminal. ing. The “+ BP” terminal is connected to the “VR1” terminal via the fixed resistor R1. The “+ SM” terminal is connected to “VR” via the capacitor C1.
2 "terminal and" INT1 "terminal. "V
A variable resistor VR provided outside the printed circuit board PC is connected between the “R1” terminal and the “VR2” terminal.

A second relay 11 is provided on the printed circuit board PC, and a ground-side fixed contact 11a of the second relay 11 is provided.
Is connected to the “+ SM” terminal. The power-side fixed contact 11b of the second relay 11 is connected to one terminal (power-side terminal) of the fixed resistor R1. The movable contact 11c of the second relay 11 is connected to the "+ SS" terminal. One terminal (power supply side terminal) of the coil 11d of the second relay 11 is connected to the “+ BP” terminal, and
The other terminal (ground side terminal) of d is connected to the collector of the transistor TR1 and the cathode of the Zener diode ZD.

The movable contact 11c is connected to the ground-side fixed contact 11a when the coil 11d is demagnetized. When the coil 11d is excited, the movable contact 11c is connected to the power-side fixed contact 11b. The anode of the Zener diode ZD and the emitter of the transistor TR1 are connected to ground terminals (“EF” terminal, “EW” terminal).

The base of the transistor TR1 is connected to a resistor R
2. It is connected to the "INT2" terminal via the diode D1. The ground terminal of the resistor R2 is connected to the “EF” terminal via the resistor R3.

A resistor R4 is provided between the "+ BP" terminal and the "B1" terminal. A resistor R5 and a resistor R6 are connected in series between the “B2” terminal and the “EF” terminal. The resistor R7 is connected to the “+ BP” terminal. The collector of the transistor TR2 is connected to the ground terminal of the resistor R7. The base of the transistor TR2 is connected between the resistors R5 and R6, and the emitter of the transistor TR2 is connected to the “EF” terminal.

A first relay 12 is provided on the printed circuit board PC, and a ground-side fixed contact 12a of the first relay 12 is provided.
(One fixed contact) is connected to the “EF” terminal.
The movable contact 12c of the first relay 12 is connected to the "+ 1RP" terminal. The power supply side terminal of the coil 12d of the first relay 12 is connected to the "+ BP" terminal, and the ground side terminal of the coil 12d is connected to the collector of the transistor TR3.

The movable contact 12c is connected to the other fixed contact 12b when the coil 12d is demagnetized. The movable contact 12c as the first movable contact is connected to the ground-side fixed contact 12a as the first fixed contact when the coil 12d as the first coil is excited. The base of the transistor TR3 is connected to the collector of the transistor TR2 via a resistor R8, a resistor R9, and a capacitor C2. The emitter of the transistor TR3 is "E
F "terminal.

A resistor R10 is connected between the base of the transistor TR3 and the "EF" terminal. A resistor R1 is connected between the terminal of the resistor R8 on the side opposite to the transistor TR3 and the "EF" terminal.
1 is connected. A free-wheeling diode D2 is connected between the terminal of the resistor R9 on the side opposite to the capacitor C2 and the "EF" terminal. The freewheeling diode D2 is connected between the negative electrode side of the capacitor C2 and the "EF" terminal via the resistor R9, and is for facilitating the flow of the discharge current of the capacitor C2.

The printed circuit board PC has an "ERP" terminal, a "WRP" terminal, and a "C1RP" terminal. The “ERP” terminal is connected to the “EF” terminal.
The “WRP” terminal is connected to the “WR” terminal, the “C1RP” terminal is connected to the “C1R” terminal, and the “+ 1RP” terminal is connected to the “+ 1R” terminal. "WR" terminal, "C1R"
The terminal and the “+ 1R” terminal are connected to the rear INT controller 15.

The rear INT controller 15 controls a rear wiper motor for driving a rear wiper (not shown) and controls a washer switch that is turned on when injecting a washer liquid onto a rear glass (not shown). That is, when the rear wiper switch RS is set to the “WASH” position, the “WRP” terminal and the “ERP” terminal are connected, the rear INT controller 15 turns on the washer switch, and as a result, the washer fluid is applied to the rear glass. Is to be injected. When the rear wiper switch RS is set to the "OFF" position as the third mode, the rear INT controller 15 turns off both the rear wiper motor and the washer switch.

Further, the rear wiper switch RS is set to "IN
When set to the "T" position, the "C1RP" terminal and the "ERP" terminal are connected, and the rear INT controller 15 intermittently operates the rear wiper motor, and as a result, the rear wiper is intermittently driven. Further, the rear wiper switch RS is set to "L" as the fourth mode.
When set to the "O" position, the "+ 1RP" terminal and the "ERP" terminal are connected, and the rear INT controller 15 operates the rear wiper motor at low speed, and as a result, the rear wiper is driven at low speed.

In this embodiment, when the setting of the front wiper switch FS is changed from the "OFF" position to the "INT" position, the movable contact 12c of the first relay 12 is changed.
Is connected to the ground-side fixed contact 12a, and the rear INT controller 15 operates the rear wiper motor at a low speed. As a result, the rear wiper is driven at a low speed. Here, the operation time of the rear wiper motor (the time during which the rear wiper is driven) is determined by the capacitance of the capacitor C2. More specifically, the capacitance of the capacitor C2 is set so that the time required for the capacitor C2 to be fully charged is the same as the time required for the rear wiper to swing about one or two reciprocations. ing.

In this embodiment, the first switching means is constituted by the transistor TR3. Timer means is constituted by the capacitor C2, the resistor R7, the resistor R8, and the resistor R9.

Next, the operation of the wiper driving device 1 configured as described above will be described. First, when the front wiper is not driven, the front wiper switch FS is set to the “OFF” position. Then, as shown in the table on the upper left side of FIG. 1, the "+1" terminal and the "+ SS" terminal are connected, and the "INT1" terminal and the "B1" terminal are connected.
The terminal and the “B2” terminal are connected. Accordingly, the current is supplied from the battery power source B to the “+ B” terminal, the “+ BP” terminal, the second
A fixed contact 11b on the power supply side of the relay 11, a fixed resistor R1,
The current flows to the ground line via the “VR1” terminal, the variable resistor VR, the “VR2” terminal, the capacitor C1, the “+ SM” terminal, the “+ S” terminal, the movable contact 4c of the switch 4, and the ground-side fixed contact 4b of the switch 4. At this time, the capacitor C1 is charged. This current stops flowing when the capacitor C1 is fully charged. Therefore, when the front wiper switch FS is set to the “OFF” position, no current flows through the front wiper motor MF, so that the front wiper is not driven.

The front wiper switch FS is set to "OF".
When set to the “F” position, the current flows from the “+ BP” terminal to the resistor R4, the “B1” terminal, the “B2” terminal, and the resistor R5.
To the base of the transistor TR2. When a current flows to the base of the transistor TR2, the transistor TR2 is turned on, and a collector current flows between the collector and the emitter of the transistor TR2 from the “+ BP” terminal via the resistor R7. In this case, the transistor TR3 is turned off, and the first coil 12d of the first relay 12 remains demagnetized, so that the rear wiper is not driven. That is, the transistor TR2 is turned on, thereby preventing the transistor TR3 from being turned on.

Next, when intermittently driving the front wiper, the setting of the front wiper switch FS is changed from the "OFF" position to the "INT" position. Then, the “+1” terminal and the “+ SS” terminal are connected, and the “INT1” terminal and the “INT2” terminal are connected. Therefore, the current is supplied from the battery power source B to the “+ B” terminal, the “+ BP” terminal, the power-source-side fixed contact 11b of the second relay 11, the fixed resistor R1, the “VR1” terminal, and the variable resistor V.
R, “VR2” terminal, “INT1” terminal, “INT2”
The current flows to the base of the transistor TR1 via the terminal, the diode D1, and the resistor R2.

When a current flows through the base of the transistor TR1, the transistor TR1 is turned on and "+"
A collector current flows between the collector and the emitter of the transistor TR1 from the “BP” terminal via the coil 11d of the second relay 11. Therefore, the coil 11d of the second relay 11
Is excited, and the movable contact 11c is
Connected to. Then, the current flows from the “+ BP” terminal to the second
A fixed contact 11b on the power supply side of the relay 11, a movable contact 11c,
The current flows to the ground line via the “+ SS” terminal, the “+1” terminal, and the “LO” terminal of the front wiper motor MF, and the front wiper motor MF makes one rotation. Then, the front wiper performs one reciprocating swing.

When the front wiper motor MF makes one rotation, the movable contact 4c of the switch 4 is connected to the ground-side fixed contact 4b. Then, the current flows from the “+ BP” terminal to the power-supply-side fixed contact 11b of the second relay 11, the fixed resistor R1, and “V
R1 ”terminal, variable resistor VR,“ VR2 ”terminal, capacitor C1,“ + SM ”terminal,“ + S ”terminal, movable contact 4c of switch 4, and ground-side contact 4b. As a result, the terminal voltage of the “INT1” terminal drops, and the base voltage of the transistor TR1 drops. When the base voltage becomes lower than the ON voltage of the transistor TR1, the transistor TR1 turns off.

When the transistor TR1 is turned off, the coil 11d of the second relay 11 is demagnetized, and the movable contact 11c is turned off.
Is connected to the ground-side fixed contact 11a. Then, since no current flows through the front wiper motor MF, the front wiper motor MF is stopped, and the driving of the front wiper is stopped.

Thereafter, when the capacitor C1 is charged,
The “INT1” terminal voltage rises, the base voltage of the transistor TR1 rises, and the base voltage
When the voltage becomes higher than the ON voltage of R1, the transistor TR
1 is turned on. When the transistor TR1 is turned on, the coil 11d of the second relay 11 is excited, and the front wiper motor MF is driven. Then switch 4
The movable contact 4c is connected to the power supply side fixed contact 4a. Then, the front wiper motor MF makes one rotation, and the front wiper performs one reciprocating swing. By repeating these operations, the front wiper is intermittently driven one reciprocation at a time.

The front wiper switch FS is set to "OF".
When the setting is changed from the “F” position to the “INT” position, the current flows from the “+ BP” terminal to the transistor TR via the resistor R7, the capacitor C2, the resistor R9, and the resistor R8.
Flow to the base of 3. Then, when a current flows to the base of the transistor TR3, the transistor TR3 is turned on, and the coil 12d of the first relay 12 is turned on from the “+ BP” terminal.
, A collector current flows between the collector and the emitter of the transistor TR3. Accordingly, the coil 12d of the first relay 12 is excited, and the movable contact 12c is connected to the ground-side fixed contact 12a.
5 operates the rear wiper motor at low speed. As a result, the rear wiper is driven at a low speed by the rear wiper motor.

Here, the transistor TR3 is turned on until the capacitor C2 is fully charged, the coil 12d of the first relay 12 is excited, and the rear wiper is driven only during that time. That is, when the capacitor C2 is fully charged, the transistor TR3 is turned off, the coil 12d of the first relay 12 is demagnetized, and the driving of the rear wiper is stopped. In the present embodiment, the capacitance of the capacitor C2 is set so that the time until the capacitor C2 is fully charged is the same as the time required for the rear wiper to swing about one or two reciprocations. Have been. That is, in this embodiment, when the setting of the front wiper switch FS is changed from the “OFF” position to the “INT” position,
The front wiper is driven intermittently, and the rear wiper is driven about one or two reciprocations.

Next, when the front wiper is driven at a low speed, the setting of the front wiper switch FS is changed from the "INT" position to the "LO" position. Then, the “+ BP” terminal and the “+1” terminal are connected. Therefore, a current flows from the “+ BP” terminal to the “+1” terminal and the ground wire via the “LO” terminal of the front wiper motor MF. As a result, the front wiper motor MF rotates at a low speed, and the front wiper is driven at a low speed.

Further, the front wiper switch FS is quickly turned off until the capacitor C2 is fully charged.
From position to "INT" position, then "LO"
When the setting is changed to the position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged.

Next, when the front wiper is driven at a high speed, the setting of the front wiper switch FS is changed from the "LO" position to the "HI" position. Then
The “+ BP” terminal and the “+2” terminal are connected. Therefore, the current flows from the “+ BP” terminal to the “+2” terminal and the ground wire via the “HI” terminal of the front wiper motor MF. As a result, the front wiper motor MF rotates at high speed, and the front wiper is driven at high speed.

Further, the front wiper switch FS is quickly turned off until the capacitor C2 is fully charged.
From position to "INT" position, then "LO"
When the position is changed to the "HI" position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged.

Therefore, according to the present embodiment, the following effects can be obtained. (1) In the present embodiment, when the setting of the front wiper switch FS is changed from the “OFF” position to the “INT” position, the front wiper is intermittently driven one reciprocation at a time and the rear wiper is driven about one or two reciprocations.
Therefore, by simply changing the setting of the front wiper switch FS from the “OFF” position to the “INT” position, both rainwater and the like adhering to the front glass and rainwater and the like adhering to the rear glass can be simultaneously removed.

(2) In this embodiment, the transistor TR
The on-time of the transistor TR3 was determined by the resistance and capacitance of the resistor R9, the capacitor C2, and the resistor R7 electrically connected to the base of the transistor No. 3 via the resistor R8. That is, the transistor TR3 is turned on for a time determined by the capacitance of the capacitor C2 and the like, and during that time, the coil 12d of the first relay 12 is excited to connect the movable contact 12c to the ground-side fixed contact 12a. As a result, the second drive source that drives the rear wiper for a time determined by the capacitance of the capacitor C2 or the like is operated, and during that time, the rear wiper is driven at a low speed, and the effect described in (1) is achieved.

For example, when the setting of the front wiper switch FS is changed from the "OFF" position to the "INT" position, the front wiper is intermittently driven, and the rear wiper is driven by one or two reciprocations. Therefore,
Both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass can be removed at the same time.

The front wiper switch FS is quickly turned off until the capacitor C2 is fully charged.
From position to "INT" position, then "LO"
When the setting is changed to the position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged. Therefore, it is possible to simultaneously remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass.

Further, the front wiper switch FS is quickly set to "OF" until the capacitor C2 is fully charged.
From "F" position to "INT" position, and further to "L"
When the setting is changed to the "O" position and the "HI" position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged. Therefore, it is possible to simultaneously remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass.

(3) In this embodiment, when the front wiper switch FS is set to the "OFF" position, the transistor TR2 is turned on and the transistor TR3 is turned off. as a result,
When the front wiper switch FS is set to the "OFF" position, the rear wiper motor is not operated, and the rear wiper is not driven.

As a result, when the front wiper switch FS is set to the "OFF" position, the rear wiper is not driven. Therefore, for example, even when the front wiper switch FS is set to the "OFF" position during traveling in fine weather, etc. Regardless, the drive of the rear wiper can be prevented.

The embodiment of the present invention may be modified as follows. In the above-described embodiment, transistors are used for the transistors TR3, TR1, and TR2 as the first switching means. However, contactless switches such as thyristors and limit switches are used instead of transistors. You may. In such a case, (1) to (1) in the above embodiment are used.
The effect described in (3) is obtained.

In the above embodiment, the freewheeling diode D2 is provided between the negative electrode of the capacitor C2 and the "EF" terminal via the resistor R9 to facilitate the flow of the discharge current of the capacitor C2. It may be omitted. In this case, the effects described in (1) to (3) in the above embodiment can be obtained.

Further, in the above embodiment, the fixed resistor R
1 and the variable resistor VR determine the “VR2” terminal voltage, but the fixed resistor R1 is omitted and the variable resistor V
The “VR2” terminal voltage may be determined only by R. In this case, a variable resistor VR having the same resistance value as the combined resistance value of the fixed resistor R1 and the variable resistor VR used in the above embodiment is used. In this case, the effects described in (1) to (3) in the above embodiment can be obtained.

Further, in the above embodiment, the "OF
The front wiper switch FS allows the setting to be changed directly from the "F" position to the "INT" position.
The front wiper switch FS may be capable of directly changing the setting from the “F” position to the “LO” position.

In this case, when the front wiper switch FS is changed from the "OFF" position to the "LO" position in addition to the effect described in (3) in the above embodiment, the front wiper is driven at a low speed. At the same time, the rear wiper is driven about one or two reciprocations.
Therefore, simply changing the setting of the front wiper switch FS from the “OFF” position to the “LO” position can easily remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass at the same time. Can be

Further, the front wiper switch FS is quickly turned off until the capacitor C2 is fully charged.
When the setting is changed from the position to the “LO” position and further to the “HI” position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged. Therefore,
Both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass can be removed at the same time.

Further, the front wiper switch FS is quickly set to "OF" until the capacitor C2 is fully charged.
F position to LO position, and H position
When the setting is changed to the "I" position or the "INT" position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged. Therefore, it is possible to simultaneously remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass.

Also, from the "OFF" position to "H"
A front wiper switch FS that can directly change the setting to the "I" position may be used. In such a case, when the front wiper switch FS is changed from the “OFF” position to the “HI” position in addition to the effect described in (3) in the above-described embodiment, the front wiper is driven at a high speed and , The rear wiper is driven about one or two reciprocations. Therefore, simply changing the setting of the front wiper switch FS from the “OFF” position to the “HI” position can easily remove both rainwater and the like adhering to the front glass and rainwater and the like adhering to the rear glass at the same time. Can be

Further, the front wiper switch FS is quickly turned off until the capacitor C2 is fully charged.
When the setting is changed from the position to the "HI" position and further to the "LO" position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged. Therefore,
Both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass can be removed at the same time.

Further, the front wiper switch FS is quickly set to "OF" until the capacitor C2 is fully charged.
From "F" position to "HI" position, and further to "L"
When the setting is changed to the "O" position and the "INT" position, the rear wiper is driven at a low speed until the capacitor C2 is fully charged. Therefore, it is possible to simultaneously remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass.

Further, in the above embodiment, the front wiper switch FS is moved from the "OFF" position as the first mode to the "INT" position as the second mode,
Although the rear wiper is driven at a low speed regardless of whether the setting is changed to the “LO” position or the “HI” position, the following may be adopted.

That is, the front wiper switch FS is set to the first
The rear wiper may be driven at low speed only when the setting is changed from the "OFF" position as the mode to the "INT" position as the second mode. Also, the front wiper switch FS is set to “OF” as the first mode.
The rear wiper may be driven at a low speed only when the setting is changed from the "F" position to the "LO" position as the second mode. Further, the rear wiper may be driven at a low speed only when the setting of the front wiper switch FS is changed from the "OFF" position as the first mode to the "HI" position as the second mode.

When the front wiper switch FS is changed from the "OFF" position as the first mode to the "INT" position as the second mode, and when the front wiper switch FS is set to "OF" as the first mode.
The rear wiper may be driven at a low speed when the setting is changed from the "F" position to the "LO" position as the second mode. When the front wiper switch FS is changed from the "OFF" position as the first mode to the "INT" position as the second mode, and when the front wiper switch FS is changed from the "OFF" position as the first mode to the second position. "HI" as mode
The rear wiper may be driven at a low speed when the setting is changed to the position.

Further, when the setting of the front wiper switch FS is changed from the "OFF" position as the first mode to the "LO" position as the second mode, and when the front wiper switch FS is set to the "OF" position as the first mode.
The rear wiper may be driven at a low speed when the setting is changed from the "F" position to the "HI" position as the second mode.

In this case, the effects described in (1) to (3) in the above embodiment can be obtained. Further, in the embodiment, the movable contact 12c of the first relay 12 is connected to the "+ 1RP" terminal,
Although the rear wiper is driven at a low speed when c is connected to the ground-side fixed contact 12a, the following may be adopted.

That is, the movable contact 12c may be connected to the "C1RP" terminal instead of the "+ 1RP" terminal. In this case, the fourth mode is configured by setting the rear wiper switch RS to the “INT” position. In such a case, (1) to (1) in the above embodiment are used.
In the effect described in (3), the rear wiper is intermittently driven instead of being driven at a low speed. Therefore, also in this case,
Both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass can be removed at the same time.

Next, technical ideas other than those described in the claims which can be understood from the above-described embodiment and other examples will be described below together with their effects. (1) The wiper driving device according to claim 1, wherein the first mode is an "OFF" position in which the front wiper is not driven, and the second mode includes an "INT" position in which the front wiper is intermittently driven, When the first switch means is changed from the "OFF" position to the "INT" position, a second switching means that is turned on and a second coil that is energized when the second switching means is turned on. Have
When the second coil is excited, a second movable contact is connected to the second fixed contact, and a second relay for operating the first drive source is provided.

Therefore, according to the invention described in (1), the first switch means is switched from the "OFF" position to the "I" state.
When the setting is changed to the "NT" position, the second switching means is turned on. Then, while the second switching means is on, the second coil of the second relay is excited, and the second movable contact is connected to the second fixed contact. As a result, while the second switching means is on,
The first drive source for driving the front wiper is operated, and the front wiper is driven.

On the other hand, when the setting of the first switch means is changed from the "OFF" position to the "INT" position, the first switching means is turned on. Then, the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. As a result, the second drive source for driving the rear wiper is operated, and the rear wiper is driven.

As a result, the first switch means is turned off.
The effect of the invention described in claim 1 is achieved only by changing the setting from the position to the “INT” position. in this case,
By driving the rear wiper while intermittently driving the front wiper, both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass can be removed at the same time. In the above embodiment, the transistor TR1 is the second transistor TR1.
Constituting switching means. The coil 11d is the second
Construct the coil. Further, the movable contact 11c forms a second movable contact. Furthermore, the power supply side fixed contact 11b forms a second fixed contact.

(2) In the wiper driving device according to claim 1, the first mode is an "OFF" position in which the front wiper is not driven, and the second mode is an "LO" position in which the front wiper is driven at a low speed. When the first switch means is changed from the "OFF" position to the "LO" position, the "LO" terminal of the first drive source among the plurality of connection points of the first switch means A connected first connection point;
The power supply for supplying a voltage required to operate the drive source to the first drive source is connected to a second connection point, and the first drive source is operated at a low speed. Therefore, according to the invention described in (2), when the setting of the first switch is changed from the “OFF” position to the “LO” position, the first switch connected to the “LO” terminal of the first drive source is switched. The connection point is connected to a second connection point connected to a power supply that supplies a voltage necessary for operating the first drive source to the first drive source. As a result, the first drive source for driving the front wiper is operated at low speed, and the front wiper is driven at low speed.

On the other hand, when the setting of the first switch means is changed from the “OFF” position to the “LO” position, the first
The switching means is turned on. Then, the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. As a result, the second driving the rear wiper
The drive source is operated, and the rear wiper is driven.

As a result, the first switch means is turned off.
The effect of the invention described in claim 1 is achieved only by changing the setting from the position to the “LO” position. In this case, by driving the rear wiper while driving the front wiper at low speed, it is possible to simultaneously remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass. In the embodiment, the “+1” terminal constitutes a first connection point. The battery power supply B constitutes a power supply. Further, the “+ B” terminal forms a second connection point.

(3) In the wiper driving device according to claim 1, the first mode is an "OFF" position in which the front wiper is not driven, and the second mode is an "HI" position in which the front wiper is driven at a high speed. When the first switch means is changed from the "OFF" position to the "HI" position, the "HI" terminal of the first drive source among the plurality of connection points of the first switch means A third connection point connected to the first connection point;
The power supply for supplying a voltage required to operate the driving source to the first driving source is connected to the second connection point, and the first driving source is operated at high speed.

Therefore, according to the invention described in (3), the first switch means is switched from the "OFF" position to the "H" position.
When the setting is changed to the “I” position, the first drive source “H”
A third connection point connected to the “I” terminal is connected to a second connection point connected to a power supply that supplies a voltage required to operate the first drive source to the first drive source. As a result, the first drive source for driving the front wiper is operated at high speed, and the front wiper is driven at high speed.

On the other hand, when the first switch means is changed from the "OFF" position to the "HI" position, the first switch means is switched to the first position.
The switching means is turned on. Then, the first coil of the first relay is excited, and the first movable contact is connected to the first fixed contact. As a result, the second driving the rear wiper
The drive source is operated, and the rear wiper is driven.

As a result, the first switch means is turned off.
The effect of the invention described in claim 1 is achieved only by changing the setting from the position to the “HI” position. In this case, by driving the rear wiper while driving the front wiper at high speed, it is possible to simultaneously remove both rainwater and the like attached to the front glass and rainwater and the like attached to the rear glass. In the above embodiment, the "+2" terminal forms a third connection point.

(4) In the wiper driving device according to any one of claims 1 to 3, and (1) to (3), when the first switch means is set to the first mode, it is turned on and And a third switching means for preventing the first switching means from being turned on by being turned on.

Therefore, according to the invention described in (4), when the first switch is set to the first mode, the third switch is turned on and the first switch is prevented from being turned on. Is done. Therefore, the second drive source for driving the rear wiper is not operated, and the rear wiper is not driven.

As a result, when the first switch means is set to the first mode, the rear wiper is not driven. For example, even when the first switch means is set to the first mode during traveling on fine weather, etc. The effect that the rear wiper can be prevented from being driven can be obtained. In the above embodiment, the transistor TR2 forms a third switching means.

[0087]

As described in detail above, according to the first aspect of the present invention, rainwater or the like adhering to the windshield can be easily obtained simply by changing the setting of the first switch means from the first mode to the second mode. And rainwater and the like attached to the rear glass can be removed at the same time.

According to the second aspect of the present invention, the rear wiper is driven for the time determined by the timer means,
In the meantime, the effects of the invention described in claim 1 are exhibited. According to the third aspect of the present invention, the rear wiper is driven for a time determined by the capacitance of the capacitor.
The effects of the invention described in claim 1 are achieved.

According to the fourth aspect of the present invention, rainwater and the like adhering to the rear glass can be easily removed only by changing the setting of the first switch means from the first mode to the second mode.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing a wiper driving device according to an embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wiper drive device, 12 ... 1st relay, 12a ... 1st
A ground-side fixed contact as a fixed contact, 12c a movable contact as a first movable contact, 12d a coil as a first coil, MF a front wiper motor as a first drive source,
FS: a front wiper switch as a first switch, RS: a rear wiper switch as a second switch, TR3: a transistor as a first switch, C2: a capacitor as a timer, R7 ... a timer. Resistance, R8: resistance constituting timer means, R9: resistance constituting timer means.

Claims (4)

[Claims] The first drive source (MF) is not activated.
A mode (OFF) and a second mode (INT, LO, HI) in which the first drive source (MF) is operated. A predetermined connection point among a plurality of connection points for each of the modes. A first switch means (FS) electrically connected to the first switch means (FS), and a second mode (INT,
And a first drive source (MF) for driving the front wiper when set to (LO, HI), wherein the first switch means (FS) is in the first mode (OF).
F), the first switching means (TR) which is turned on when the setting is changed to the second mode (INT, LO, HI).
3) and a first coil (12d) that is excited when the first switching means (TR3) is turned on. The first movable contact (12c) is excited when the first coil (12d) is excited. ) Is connected to the first fixed contact (12a), the first drive source for driving the second drive source for driving the rear wiper is activated.
A wiper driving device including a relay (12). 2. The wiper driving device according to claim 1, wherein said first switching means (TR3) includes timer means (C2, R7, R8, R3) for determining an ON time of said first switching means (TR3). R9) is electrically connected, and the operation time of the second drive source for driving the rear wiper is determined by the timer means (C2, R7, R8, R9). 3. The wiper driving device according to claim 2, wherein the timer means includes a capacitor (C2), and an ON time of the first switching means (TR3) is determined by a capacitance of the capacitor (C2). And an operating time of the second drive source is determined. 4. The wiper driving device according to claim 1, wherein a third mode (OFF) in which the second driving source is not operated, and a fourth mode (OFF) in which the second driving source is operated. LO), and a second switch means (RS) for electrically switching and connecting a predetermined connection point among a plurality of connection points for each mode, wherein the first switch means (FS) The first mode (OF)
F), the setting is changed to the second mode (INT, LO, HI) and the first switching means (TR3) is turned on, so that the first relay (12) is turned on.
The coil (12d) is excited, and the first movable contact (12d) is excited.
When c) is connected to the first fixed contact (12a), a first connection point between the predetermined connection points switched when the second switch means (RS) is set to the fourth mode (LO) is set to the first. A wiper driving device wherein a short circuit occurs at a movable contact (12c).