JP2580559Y2 - Washer-linked wiper drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer-operated wiper drive device which performs several wiper operations by ejecting a cleaning liquid and several wiper operations without ejecting a cleaning liquid during the operation time of a washer switch.

[0002]

2. Description of the Related Art In a washer-operated wiper driving device, a predetermined delay time (from a time when the washer switch is turned on to a time when the driving of the wiper is started) is required in order to turn on the washer switch and sufficiently spray the cleaning liquid. (Hereinafter referred to as a delay time). Further, in order to sufficiently clean the window with the cleaning liquid, a predetermined delay time (hereinafter referred to as an interlocking time) must be provided in a period from turning off the washer switch to stopping the driving of the wiper. Furthermore, in the case of running in fog, it is necessary to drive the wiper once or several times without wiping the cleaning liquid to wipe the window, and some vehicles have a mist (MIST) switch to obtain such an operation. That is, by turning on the mist switch, only the wiper is driven once or several times without spraying the cleaning liquid.

In a wiper driving device provided with a mist switch, a time constant circuit for obtaining the delay time and the interlocking time when the wiper is driven in conjunction with a washer, and only the wiper is operated once when the mist switch is turned on. In addition, there is a problem that a drive unit for driving the drive several times is provided, and the number of parts increases. In addition, it is necessary to separately provide a mist switch in addition to the washer switch, and during actual running of the mist switch, operability is complicated due to an increase in switch operations. In order to solve this problem, there has been proposed a configuration in which three operations of MIST, washer interlock, and wiper delay are performed according to the operation time of one washer switch. An example is disclosed in Japanese Utility Model Laid-Open No. 63-189766.

[0004]

The washer-linked wiper driving device having the above three functions has a complicated circuit configuration because circuits for realizing the respective functions are provided independently. As a result, the number of components increased, and the circuit board had to be enlarged. The adoption of an independent circuit configuration for each function as described above has a problem that miniaturization and weight reduction are restricted. The purpose of this invention is
An object of the present invention is to provide a washer-linked wiper driving device capable of reducing the number of parts of a washer-linked circuit, and reducing the size and weight.

[0005]

In order to achieve the above object, a washer-linked wiper driving device according to the first aspect of the present invention includes a wiper motor driven by a battery power source, a relay for controlling the energization of the wiper motor, A first transistor for driving the relay, a time constant circuit connected to the first transistor for determining an intermittent operation of the wiper, and a washer driven by a battery power supply for ejecting a cleaning liquid when the battery power supply is energized for a predetermined period or more. A motor, a washer switch connected between the washer motor and a battery power source, and an ON of the washer switch
And a washer interlocking circuit that operates the first transistor to drive the relay when the washer switch is turned on from a battery power source via a diode, a first resistor, and a second resistor. A first driver circuit for supplying a base current of the first transistor; and a second transistor having a collector connected between the first resistor and the second resistor. A first capacitor is inserted between the diode of the first drive circuit and the first capacitor. When the first capacitor is charged when the washer switch is turned on, the first capacitor is charged until the terminal voltage of the first capacitor reaches a predetermined value. While the second
And a second capacitor charged through the second resistor to turn on the first transistor and maintain the off state of the first transistor. The second capacitor is charged when the washer switch is turned on. And a second drive circuit for supplying a base current of the first transistor from the second capacitor for a predetermined time after the washer switch is turned off.
When the charging voltage of the capacitor reaches a predetermined value, the off state of the first transistor by the wiper delay circuit is released and a base current is supplied from the first drive circuit,
Are turned on.

According to a second aspect of the present invention, in the washer-linked wiper driving device according to the first aspect, the washer-linked circuit is connected to the washer switch via a diode, a first resistor, and a second resistor from a battery power supply when the washer switch is turned on. A first drive circuit that supplies a base current of the first transistor; and a capacitor that is charged through the first resistor. When the washer switch is turned on, the capacitor is charged, and the washer switch is turned off. A second driving circuit that supplies a base current of the first transistor via the second resistor for a predetermined time later, and a third resistor between the second resistor and the base of the first transistor. A second transistor connected to the collector via the second transistor, the second transistor being turned on by a washer switch.
A wiper delay circuit that is turned on at the same time to maintain the off state of the first transistor, and releases the off state of the first transistor by the wiper delay circuit when the charging voltage of the capacitor reaches a predetermined value. Then, a base current is supplied from a first drive circuit to turn on the first transistor.

[0007] The invention according to claim 3 is based on claim 1.
A first drive circuit for supplying a base current of the first transistor from a battery power supply via a diode, a first resistor, and a second resistor when a washer switch is turned on; And a capacitor that is charged through a resistor of the first transistor. When the washer switch is turned on, the capacitor is charged. The base current of the first transistor is passed through the second resistor for a predetermined time after the washer switch is turned off. A second driving circuit for supplying a first transistor, a second transistor having a collector connected to the base of the first transistor, a connection point between the first resistor and the second resistor, and a base of the first transistor. A Zener diode inserted between the capacitors, and when the charging voltage of the capacitor reaches a predetermined value, the Zener diode A wiper lagged circuit for turning on the Zener voltage is applied to the base of the first transistor, and a.

[0008]

According to the above arrangement, the O of the washer switch is
The N period is longer than the cleaning liquid ejection period of the washer motor,
In the case of a short time, the first drive circuit is in a constrained state by the wiper delay circuit, and the wiper is not driven.
After the ejection of the cleaning liquid, the wiper is driven several times only during the interlocking time determined by the time constant of the second drive circuit. If the ON period of the washer switch is longer than the cleaning liquid ejection period of the washer motor and is longer, the first drive circuit is operated by the wiper delay circuit after the cleaning liquid is ejected, and the wiper is driven. Thereafter, when the washer switch is turned off, the wiper is driven several times by the second drive circuit. If the ON period of the washer switch is shorter than the cleaning liquid ejection period of the washer motor, the wiper is not driven by the first drive circuit and the wiper is driven by 1 by the second drive circuit.
It is driven several times.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the circuit configuration of the washer-linked wiper driving device of the present invention. Since the washer-linked wiper drive is performed at the OFF position and the INT position of the wiper switch SW2, in this embodiment, only the switch positions related to the washer-linked wiper drive will be described, and the LO and HI positions will be omitted.

A wiper switch SW2 (hereinafter referred to as a switch SW)
2) are an OFF position where the wiper is driven, an INT position where the wiper is driven intermittently, an LO position where the wiper is driven at a low speed, and
It is possible to switch between a high-speed driving HI position. The switch SW2 and the contact LO and AS and contacts INT ₁ and _{B 1} are respectively connected in the OFF position. At the LO position and the HI position, the contacts ACC and LO and the contact AC
C and HI are connected. The wiper motor M2 rotates at a high speed when a voltage is applied to the high-speed drive terminal H, and rotates at a low speed when a voltage is applied to the low-speed drive terminal L. The high-speed and low-speed drive terminals H and L are connected to the contacts HI and LO of the switch SW2, respectively.

Further, the wiper motor M2 and the automatic stop switch SW3 to replace contact switching is provided in conjunction, the switch SW3 is movable contact A _S when the wiper is in the stop position switched to the fixed contact e side, wiper there movable contact a _S when in a position other than the stop position operates as switched to the fixed contact d side. The fixed contacts d and e of the switch SW3 is connected to each battery power source V _B and the ground point, the battery power source V _B are connected to the contact ACC switch SW2.

The contact AS of the switch SW2 is connected to the movable contact a of the relay RL, and one fixed contact b is connected to the movable contact AS of the switch SW3. Also other fixed contact c is connected to the movable contact AS switch SW3 via battery power V _B and the resistor R1 and the capacitor C1. Further, a switch SW2 is connected to the connection point of R1 and C1.
Are connected.

[0013] (hereinafter referred to as Tr1) first transistor Tr1 has its collector connected to the battery power supply V _B through the excitation winding of the relay RL, is grounded emitter via a Zener diode ZD. The base is connected to a switch SW via a resistor R2 and a diode D1.
2 and is grounded via a resistor R3. Contact B1 of switch SW2 is connected to the battery power source _{V B} through R8. Washer switch SW
1 (hereinafter referred to as a switch SW1), the contacts ACC and WA are cut off at the OFF position, and both contacts ACC and WA are connected at the ON position. Each contact ACC and WA are respectively connected to the battery power source _{V B} and washer motor M1. The contact WA is connected to a washer interlocking circuit 1 that controls Tr1.

Next, the operation of the washer-linked wiper driving device will be described. Switch S when switch SW2 is in the OFF position
When W1 is also in the OFF position, the contacts LO and AS and the contact I
Since NT1 and B1 are connected to each other, Tr1 is off and relay RL is not driven. Wiper motor M
2 is a low-speed drive terminal L → contact LO → contact AS → movable contact a
A closed loop is formed on the path of the fixed contact b → the movable contact A _S → the fixed contact e. Therefore, since the movable contact a of the relay RL is connected to the fixed contact b, the wiper motor M2 is not energized. Similarly, since the washer motor M1 is not energized, neither motor M1 or M2 is driven.

[0015] When the switch SW2 and the INT position (SW1 is OFF position), the battery power supply V _B is the resistance R1
The contact INT1 → the contact INT2 → the diode D1 → is supplied to the base of the transistor Tr1 via the resistor R2. Therefore, T
r1 is turned on, the relay RL is activated, and the movable contact a is switched to the fixed contact c. Therefore, the battery power supply V _B
Is the path of the fixed contact c → the movable contact a → the contact AS → the contact LO → the low speed drive terminal L of the wiper motor M2.
2 and drive at low speed. When the wiper motor M2 rotates, the wiper is driven, the movable contact A _S of the automatic stop switch SW2 is switched from the fixed contact e to the contact d side. The first movable contact A _S of the rotating wiper stop position (driving start position) to return the auto stop switch SW3 is switched again to the fixed contact e side, the wiper motor M2 is stopped abruptly. This INT operation is repeated with a time constant determined by the resistor R1 and the capacitor C1.

Next, an embodiment of the washer interlock circuit will be described. First Embodiment In FIG. 1, a washer interlocking circuit 1 includes a switch SW1.
Has a first drive circuit that supplies a base current to Tr1 via diode D4, resistor R5, resistors R4 and D2 to turn on Tr1, and a time constant determined by resistors 4, 5 and capacitor C2. Switch SW
In order to drive the wiper for a predetermined time when
a second driving circuit for maintaining r1 in an on state; and a second driving circuit in which a common emitter collector is connected between the resistors 4 and 5.
(Hereinafter referred to as Tr2), and this transistor Tr2 is turned on at the same time when the switch SW1 is turned on.
1, a wiper delay and interlock circuit 10 that turns off after a predetermined time, turns on Tr1, and drives the wiper by delaying it for a predetermined time.

The wiper lagged-interlocking circuit 10 includes a capacitor C2 inserted between the D4 connected in R6 and the power source V _B connected to the base of Tr2, the terminal voltage of the capacitor C2 The on / off operation of Tr2 is performed. That is, since the terminal voltage of the capacitor C2 is “0” immediately after the switch SW1 is turned on, Tr
2 has a high base potential, and Tr2 is turned on. Therefore,
Tr1 is in an on state due to energization by a path of D4, R5, R4, and D2 (hereinafter, referred to as a "first path"). , Tr1 are kept off. At the same time, the capacitor C2 is charged via D4, and when the charging voltage reaches a predetermined value, Tr2 is turned off.

The second drive circuit is set to have a time constant larger than the time constant of the wiper delay / interlock circuit 10;
When the switch SW1 is turned off after being turned on for a certain period of time, Tr1 is kept turned on for a certain period of time through a path from the diode D3 → C2 → R5 → R4 → D2 → Tr1. R5 limits the collector current of Tr2 when SW1 is ON and Tr2 is ON, and also sets Tr5 after SW1 is turned ON.
Set to increase the time until 1 turns ON, that is, the delay time. The delay time is determined by a time constant with the capacitor C3. D3 is provided to prevent C2 from discharging to the motor via R6 when SW1 is turned from ON to OFF.

According to the washer interlocking circuit of this embodiment,
Since the signal from the wiper delay / interlock circuit 10 to Tr2 is output after a predetermined time T1 (wiper delay time) from the ON signal of the switch SW1, the wiper operation is performed as shown in FIG. Started after SW
The turning off of 1 stops the ejection of the cleaning liquid, and the second drive circuit drives the wiper for a fixed time.

Next, the switch SW2 in the first embodiment
When the switch SW1 is turned to the ON position in the state of the OFF position, the operation for each ON period will be described. (1) ON period is longer than the washing liquid jetting period washer motor M1, and (hereinafter referred to as operations) short when ON the switch SW1 Then, the battery power supply V _B is supplied to the washer motor M1. ON period T ₀₁ at this time SW1, as shown in FIG. 2, the predetermined time T1 (≦ exceeding the predetermined time TW required to eject the cleaning liquid
_T01 ) or more, the cleaning liquid is ejected after a lapse of time TW from the ON of SW1.

Meanwhile battery power V _B is supplied to the wiper lagged-interlocked circuit 10 via the diode D4, Tr2 are turned on. Then, the input terminal of the second drive circuit becomes L level, and the charging of the capacitor C3 is not performed.
Tr1 is turned off, and power is not supplied to wiper motor M2. When SW1 is turned off before the cleaning liquid is ejected and before the terminal voltage of the capacitor C2 reaches a voltage sufficient to turn off Tr2, the wiper delay and interlock circuit 1 is turned on.
0 is cut off from the battery power supply, and Tr2 is turned off.

At the same time, a base current is supplied from the capacitor C2 to the transistor Tr1 for a predetermined time T2, and the transistor Tr1 is turned on. The wiper is driven several times during the wiper interlocking time T2 shown in FIG. According to the above-mentioned wiper interlock, SW1 is ON
Then, the cleaning liquid is sprayed first, and then SW1 is turned off.
Then, the wiper is driven several times during the interlocking period determined by the time constant of the second drive circuit. (2) When the ON period is longer than the cleaning liquid ejection period of the washer motor M1 and is long (hereinafter referred to as operation), when the switch SW1 is turned ON for a long time, the terminal voltage of the capacitor C2 increases and the Tr2 is turned off. Then the first
Tr1 is turned on by the path, and at the same time, charging of the capacitor C3 is started. That is, Tr1 is turned on after the cleaning liquid is ejected by the power supply of the washer motor M1, and power is supplied to the wiper motor to drive the wiper. The wiper operation at this time is performed while the switch SW1 is kept pressed, that is, during the ON period. Thereafter, when the switch SW1 is turned off, the washer motor M1 is stopped, and the supply of the cleaning liquid is stopped. Since the base current is supplied to Tr1 from the capacitors C2 and C3, energization of the wiper motor M2 is continued for a predetermined time, and the wiper is driven several times. According to the wiper delay, when the switch SW1 is turned on, first, the cleaning liquid is jetted, and after a predetermined time has elapsed, the wiper motor is driven to perform the wiper operation. Thereafter, the switch SW1 is turned off, and the wiper is driven several times during the interlocking period determined by the time constant of the time constant circuit 10.

(3) When the ON period is shorter than the cleaning liquid ejection period of the washer motor M1 (hereinafter referred to as operation) When the switch SW1 is turned on, the washer motor M1 is energized and Tr2 is turned on. At this time, the SW1 ON period T
_As shown in FIG. 2, ₀₂ is a predetermined time T3 (≦ T ₀₂ ) which is equal to or less than a predetermined time TW required for jetting the cleaning liquid, so that the cleaning liquid is not jetted. The capacitor C3 is not charged because T3 is capable of mist operation and the input terminal of the second drive circuit is at the L level due to the turning on of Tr2. Therefore, the first path is not formed, Tr1 is off, and the wiper is not driven. When the switch SW1 is turned off, the transistor Tr2 is turned off, and at the same time, the base current is supplied to the transistor Tr1 from the capacitor C2 via the path of D3 → C2 → R5 → R4 → R2, and the transistor SW1 is turned on. Is driven once or several times. According to the above mist operation,
When the SW1 is turned on and then turned off in a short time, the cleaning liquid is not ejected, and only the wiper motor is driven to perform the wiper operation.

(Second Embodiment) FIG. 3 shows the configuration of another embodiment of the washer interlocking circuit.
The washer interlocking circuit 1 includes a first driving circuit including a diode D4, a resistor R6, a resistor R5, and a diode D2, and a wiper delay / interlocking circuit 10 having a collector Tr2 connected to the base of the Tr1 via a resistor R4. , A resistor 6 and a second drive circuit 13 comprising a grounded capacitor C2.

When the switch SW1 is turned on, Tr1 is turned on by the first drive circuit. However, a base current is supplied to Tr2 via the diode D4, and Tr1 is turned on.
The base potential of Tr1 is forcibly set to L level, and Tr1
Is prohibited and the off state is maintained. At this time, the capacitor C2 of the second drive circuit 13 is charged through the path of the diode D3 → R6 → R5 → R4 → Tr2.

Since the transistor Tr2 is turned off when the switch SW1 is turned off, a base current is supplied from the capacitor C2 to the transistor Tr1 to turn it on. This ON time is determined by the capacitor C2
And the time constant of R5. Normally, the wiper is set to be driven several times. The time constant R6C is set so that the capacitor C2 is charged in a short time.
2 is set large.

Next, the operation of the washer-linked wiper drive in the second embodiment will be described. (1) In case of operation When switch SW1 is turned on, Tr2 is turned on and Tr1 is turned on.
Is set to the L level, Tr1 is maintained in the off state, and charging of the capacitor C2 is started at the same time. Then, when the switch SW1 is turned off after the cleaning liquid is jetted, Tr2 is turned off. At the same time, the capacitors C2 to R
5, a base current is supplied to Tr1 to turn it on, and the wiper is driven several times during the wiper interlocking time T2.

(2) Operation When the switch SW1 is turned on for a long time, the capacitor C2
, The potential at the connection point of R4 and R5 rises, and Tr1 is turned on.
2 to drive the wiper. Then, switch SW
When 1 is turned off, the washer motor M1 is stopped, and the supply of the cleaning liquid is stopped. Since the base current is supplied to Tr1 from the capacitor C2, energization of the wiper motor M2 is continued for a predetermined time, and the wiper is driven several times.

(3) In case of operation When switch SW1 is turned on, Tr2 is turned on,
Tr1 is maintained in the off state. On the other hand, the second drive circuit 1
Since 3 has a large time constant, the capacitor C2 is sufficiently charged in a short time to turn on Tr1. When SW1 is turned off in a short time, Tr2 is turned off,
At the same time, the base current becomes T from capacitor C2 through R5.
The wiper motor M1 is turned on when supplied to r1, and the wiper motor M1 is energized for a predetermined time to drive the wiper once or several times.

(Third Embodiment) FIG. 4 shows the configuration of another embodiment of the washer interlocking circuit.
The washer interlocking circuit 1 includes a first driving circuit including a diode D4, a resistor R5, a resistor R4, and a diode D2, a wiper delay / interlocking circuit having a collector Tr2 having a collector connected to the base of the transistor Tr1, a resistor R5, and a ground. A capacitor C2 is provided, and a connection point between R5 and C2 is connected to Tr1.
And a second drive circuit 13 having a zener diode ZD2 inserted between the bases. Switch SW
When the switch 1 is ON, the operation is the same as that of the second embodiment. Since Tr2 is turned off when the switch SW1 is turned off,
Zener diode Z by terminal voltage of capacitor C2
The Zener voltage of D2 is applied to Tr1 to turn on and drive the wiper several times. This on-time is determined by the capacitors C2 and R
It is determined by the time constant of 4.

Next, the operation of the washer-linked wiper drive in the third embodiment will be described. (1) In case of operation When switch SW1 is turned on, Tr2 is turned on and Tr1 is turned on.
Is kept off. At the same time, charging of the capacitor C2 is started. When SW1 is turned off before the cleaning liquid is spouted by energization of the wiper motor M1 and before the charging voltage of the capacitor C2 reaches the Zener voltage of the Zener diode ZD2, Tr2 is turned off, and the capacitor C2 is turned off via R4 and the diode D2. Since the base current is supplied to Tr1 for a predetermined time T2, Tr1 is turned on and the wiper is driven several times.

(2) In case of operation When the switch SW1 is turned ON for a long time, the capacitor C2
, The Zener voltage of the Zener diode ZD2 is applied to the base of Tr1 via the diode D5 to turn on Tr1. That is, Tr1 is turned on after the cleaning liquid is ejected by the power supply of the washer motor M1, and power is supplied to the wiper motor to drive the wiper.

(3) Operation When the switch SW1 is turned on, charging of the capacitor C3 is started and Tr2 is turned on. At this time, Tr
Since Tr2 is at the L level by turning on, Tr1 is maintained in the off state. When the switch SW1 is turned off in a short time after being turned on, the transistor Tr2 is turned off. At the same time, the base current is supplied to the transistor Tr1 from the capacitor C2 via the capacitor R4, and the transistor Tr1 is turned on. Drive twice.

(Fourth Embodiment) FIG. 5 shows the configuration of another embodiment of the washer-linked wiper drive circuit.

The washer interlocking circuit 1 includes a diode D4
A first driving circuit including a resistor R5, a Zener diode ZD2, a resistor R4, and a diode D2; an emitter connected between R5 and ZD2;
A wiper delay circuit connected to the base of r1 and having a base Tr2 connected to D4 with the power supply side as a forward direction, and R6 inserted between the connection point of D3 and D4 and ground.
It comprises an interlocking circuit and a second drive circuit comprising a capacitor C2 provided between the connection point of the resistors R5 and ZD2 and the ground, and comprising the R5 and C2.

Next, the operation of the washer-linked wiper drive of the fourth embodiment will be described. (1) ON the case of the operation switch SW1 Then, the battery power supply V _B is the charging of the capacitor C2 is started through the diode D4, R5. At this time, Tr2 is in an off state because the base potential is higher than the emitter potential. The capacitor C2
The Zener diode ZD2 is maintained at a high resistance until the charging voltage of the IGBT reaches a predetermined value. Therefore, Tr
1 is kept off. SW1 is turned off before the cleaning liquid is ejected and before the charging voltage of the capacitor C2 exceeds the Zener potential of the Zener diode ZD2.
Then, since the base potential of Tr2 decreases and the emitter potential is high due to the charging of the capacitor C2, the base current is supplied from the emitter and Tr2 is turned on. As a result, Tr1 is switched from the capacitor C2 to Tr
2, a base current is supplied via R4 and D2 to turn on, driving the wiper several times. (2) In the case of operation When the switch SW1 is turned on for a long time and the charging voltage of the capacitor C2 becomes higher than the Zener potential, the resistance of ZD2 becomes low and the base current is supplied through the path of D4 → R5 → ZD2 → R4 → D2. Tr1 is turned on. That is, Tr1 is turned on and the wiper is driven after the cleaning liquid is ejected by the power supply of the washer motor M1. Switch SW
The operation by turning OFF 1 is the same as the above operation.

(3) In the case of operation If the ON period of the switch SW1 is short, T
Since the switch SW1 is turned off before r1 is turned on, the terminal voltage of the capacitor C2 at this time becomes R5 and R5.
In order to make the base potential lower than the emitter potential, the base current supplied from the emitter causes Tr
2 is turned on, and T is turned on through the route of C2 → Tr2 → R4 → D2.
r1 turns on and drives the wiper one or several times.

(Fifth Embodiment) FIG. 6 shows the configuration of another embodiment of the washer-linked wiper drive circuit. The present embodiment is characterized in that the Zener diode ZD2 of the fourth embodiment is replaced with a resistor R7. Other configurations are the same as those of the fourth embodiment. (1) In the case of operation Tr1 is maintained in an off state until the charging voltage of the capacitor C2 reaches a predetermined value after the switch SW1 is turned on. During this time, the cleaning liquid is spouted, and then SW1 is turned off.
Then, when Tr2 is turned on, Tr1 is turned on and drives the wiper several times. (2) Operation When the switch SW1 is turned on for a long time and the charging voltage of the capacitor C2 is increased, the base current is supplied to Tr1 via R7 and D2 to turn on and drive the wiper. The operation by turning off the switch SW1 is the same as the above operation.

(3) Operation When the ON period of the switch SW1 is short, the switch SW1 is turned off before the charging voltage of the capacitor C2 becomes sufficiently high, that is, before the Tr1 is turned on.
, Tr2 is turned on by the base current supplied from the capacitor C2 via the emitter charged during the ON period, and turned on by supplying the base current from the capacitor C2 to Tr1, thereby driving the wiper once or several times.

(Sixth Embodiment) FIG. 7 shows the configuration of another embodiment of the washer-linked wiper drive circuit. The washer interlocking circuit 1 connects the collector side of Tr2 to the base of Tr1 via R4 and D2,
Is connected to a switch SW1 via D4. A series circuit of R6 is inserted between the emitter and the base of Tr2, and a series circuit of R6 and R7 is inserted between the base and the ground. Further, a series circuit of a diode D3 and a capacitor C2 having the base side of Tr2 as a forward direction is inserted between the connection point of R6 and R7 and the diode D4.
The resistor R8, which is grounded E, is connected to the connection point between the resistor R2 and C2. Here, D4, Tr2, R5 to R7 are the first driving circuit, Tr2, C2, D3, R6, R7 are the wiper delay / linkage circuits, and Tr2, C4, R5 to 8, D
Reference numeral 3 denotes a second drive circuit.

Next, the operation of the washer-linked wiper drive of the sixth embodiment will be described. (1) In the case of operation When the switch SW1 is turned on, charging of C2 is started. However, while the charging voltage of the capacitor C2 is low, R5 and R6 are charged.
Tr2 is off because the potential at the connection point between R6 and R7 is lower than the potential at the connection point at. Therefore, Tr1
Are kept off. SW1 after the cleaning liquid spouts
Is turned off, the charging voltage of C2 is applied to both ends of R5 and R6, Tr2 is turned on by the divided voltage, and a base current is supplied from C2 to Tr1 via Tr2. As a result, Tr1 turns on and drives the wiper several times.

[0042] (2) The long ON when the operation switch SW1, the charge voltage of C2 is high, the potential at the connection point of R6 and R7 is lowered, the Tr2 turns, Tr2 from the power supply V _B, R7 , D2
, A base current is supplied to Tr1 to turn on, and drives the wiper. The operation by turning off the switch SW1 is the same as the above operation. (3) Operation If the ON period of the switch SW1 is short, before the charging voltage of C2 becomes sufficiently high, that is, before Tr2 is turned on,
Since the switch SW1 is turned off, the terminal voltage of C2 charged during the ON period is divided into R5 and R6 and Tr2
To turn on Tr2. Then C
The base current is supplied to Tr1 from Tr2 via Tr2 and turned on, and the wiper is driven once or several times.

[0043]

As described above, according to the present invention, the number of parts is reduced by configuring a part of the parts constituting the respective modes of the washer interlock, the wiper delay and the mist in common. The size and weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a first embodiment of the present invention.

FIG. 2 is a timing chart of washer-linked wiper driving according to the operation time of a washer switch.

FIG. 3 is a washer interlocking circuit diagram according to a second embodiment.

FIG. 4 is a washer interlocking circuit diagram according to a third embodiment.

FIG. 5 is a washer interlocking circuit diagram according to a fourth embodiment.

FIG. 6 is a washer interlocking circuit diagram according to a fifth embodiment.

FIG. 7 is a washer interlocking circuit diagram according to a sixth embodiment.

[Explanation of symbols]

1 washer interlock circuit, SW1 washer switch, SW2 wiper switch, SW3 auto stop switch, M1 washer motor, M2 wiper motor, RL relays, V _B battery power, Tr1 first
Transistor, Tr2 second transistor

Continuation of the front page (56) References JP-A-51-47728 (JP, A) JP-A-57-182447 (JP, U) JP-A-63-189766 (JP, U) JP-A-57-45456 (JP) , U) Fully open sho 61-81458 (JP, U) Really open sho 62-51066 (JP, U) Real open sho 51-105739 (JP, U) Real open sho 54-115043 (JP, U) (58) Surveyed field (Int.Cl. ⁶ , DB name) B60S 1/46

Claims (3)

(57) [Scope of request for utility model registration] 1. A wiper motor driven by a battery power supply, a relay for controlling energization of the wiper motor, a first transistor for driving the relay, and an intermittent operation of the wiper connected to the first transistor. A constant circuit, a washer motor driven by the battery power supply for discharging the cleaning liquid when the battery power supply is energized for a predetermined period or more, a washer switch connected between the washer motor and the battery power supply, and an O of the washer switch.
A washer interlock circuit for operating the first transistor at N and driving the relay; wherein the washer interlock circuit is turned on from a battery power supply via a diode, a first resistor, and a second resistor when a washer switch is turned on. A first drive circuit for supplying a base current of the first transistor; and a second transistor having a collector connected between the first resistor and the second resistor, wherein a base of the second transistor is provided. Between the first driving circuit and the diode of the first driving circuit.
The first capacitor is charged when the washer switch is ON, and the second transistor is turned on until the terminal voltage of the first capacitor reaches a predetermined value. And a second capacitor charged through the second resistor, the second capacitor being charged when the washer switch is ON, and a washer switch And a second drive circuit for supplying a base current of the first transistor from the second capacitor for a predetermined time after the OFF of the first capacitor, and the wiper delay when the charging voltage of the first capacitor reaches a predetermined value. The first transistor is turned off by releasing the off state of the first transistor by the driving circuit and supplying the base current from the first driving circuit. Washer interlock wiper drive apparatus according to claim Rukoto. 2. A wiper motor driven by a battery power source, a relay for controlling the energization of the wiper motor, a first transistor for driving the relay, and an intermittent operation of the wiper connected to the first transistor. A constant circuit, a washer motor driven by the battery power supply for discharging the cleaning liquid when the battery power supply is energized for a predetermined period or more, a washer switch connected between the washer motor and the battery power supply, and an O of the washer switch.
A washer interlocking circuit for operating the first transistor at N and driving the relay, wherein the washer interlocking circuit is turned on from a battery power supply via a diode, a first resistor, and a second resistor when a washer switch is turned on. A first driving circuit that supplies a base current of the first transistor; and a capacitor that is charged through the first resistor.
A second drive circuit that charges the capacitor when the washer switch is turned on and supplies a base current of the first transistor via the second resistor for a predetermined time after the washer switch is turned off; Between the resistor of the first transistor and the base of the first transistor.
And a wiper delay circuit for turning on the washer switch when the washer switch is ON to maintain the off state of the first transistor, and When the charging voltage of the capacitor reaches a predetermined value, the off state of the first transistor by the wiper delay circuit is released, a base current is supplied from the first driving circuit, and the first transistor is turned on. A washer-linked wiper drive device characterized by the following. 3. A wiper motor driven by a battery power supply, a relay for controlling the energization of the wiper motor, a first transistor for driving the relay, and an intermittent operation of the wiper connected to the first transistor. A constant circuit, a washer motor driven by the battery power supply for discharging the cleaning liquid when the battery power supply is energized for a predetermined period or more, a washer switch connected between the washer motor and the battery power supply, and an O of the washer switch.
A washer interlock circuit for operating the first transistor at N and driving the relay; wherein the washer interlock circuit is turned on from a battery power supply via a diode, a first resistor, and a second resistor when a washer switch is turned on. A first driving circuit that supplies a base current of the first transistor; and a capacitor that is charged through the first resistor.
A second drive circuit that charges the capacitor when the washer switch is turned on, and supplies a base current of the first transistor via the second resistor for a predetermined time after the washer switch is turned off; A second transistor to which a collector is connected, a Zener diode inserted between a connection point of the first resistor and the second resistor, and a base of the first transistor, and A wiper delay circuit for applying a zener voltage of the zener diode to the base of the first transistor to turn on when the charging voltage reaches a predetermined value;