JPS6219470Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention operates the wiper after the operation of the washer switch is completed, and when the operation time of the washer switch exceeds a predetermined time limit, the washer fluid is discharged excessively. The present invention relates to a washer-linked wiper operating device that automatically operates a wiper in order to quickly eliminate obstructions to visibility.

2. Description of the Related Art Conventionally, automobiles have been equipped with a washer device and a wiper device, and there are also devices in which these devices are linked together.

By the way, in the case of wipers that operate automatically after the washer operation is released, a large amount of washer fluid is released onto the windshield when the windshield is heavily soiled, but this temporarily obstructs visibility when driving, causing an accident. may cause this to occur.

The present invention was devised to overcome this drawback, and the wiper is automatically operated when the operating time of the washer switch exceeds a predetermined time.

Hereinafter, a preferred embodiment of the washer-linked wiper operating device according to the present invention will be described in detail with reference to FIG.

1 is a washer switch, one side is grounded and the other side is connected to a DC power source 3 via a washer motor 2.
is connected to the positive terminal of the 4 is a wiper motor, one of which is connected to the positive electrode of the DC power supply 3, and the other connected to the movable contact piece 5a of the wiper switch 5.

6 is an amplifier circuit section, which includes transistors 60, 6
1, a resistor 62, a relay 63, etc. The relay 63 has a relay coil 63a and a movable contact piece 63b that is attracted by the excitation of the relay coil 63a.
and fixed contacts 63c and 63d.
In the relay 63, the movable contact 63b is connected to the fixed contact 5b of the wiper switch 5, the fixed contact 63c is connected to the movable contact 7a of the automatic stop switch 7, and the fixed contact 63d is grounded.

The fixed contact 7b of the automatic stop switch 7 is grounded, and the fixed contact 7c is connected to the positive electrode of the DC power supply 3. Also, the fixed contact 5c of the wiper switch 5
is grounded, and the negative pole of the DC power supply 3 is also grounded. One end of the relay coil 63a is connected to the positive electrode of the DC power source 3, and the other end is connected to the collector of the transistor 61.

The emitter of the transistor 61 is grounded, and the base is connected to the transistor 60 via a resistor 62.
is connected to the collector of The emitter of the transistor 60 is connected to the positive electrode of the DC power supply 3.

The negative electrode of the DC power supply 3 is grounded.

Reference numeral 8 denotes a first time limit circuit, which is composed of a capacitor 80, a charging time setting resistor 81, a discharging resistor 82, and a diode 83.

One end of the capacitor 80 is connected to the positive electrode of the DC power source 3, and the other end is connected to one of the charging time setting resistors 81 and one of the discharging resistors 82. The other side of the discharge resistor 82 is the transistor 6
0, and the other side of the charging time setting resistor 81 is connected to the anode of the diode 83. The cathode of the diode 83 is connected to the other side of the watch switch 1. When the watch switch 1 is turned on, the capacitor 80 is charged via the charging time setting resistor 81 and the diode 83, and when the watch switch 1 is turned off, the capacitor 80 is charged through the discharge resistor 82 and the base of the transistor 60. , is discharged through the emitter. Here, if the resistance value of the charging time setting resistor 81 is set relatively large, the amount of charge charged to the capacitor 80 can be changed according to the operation time of the washer switch 1, and the charging time setting resistor 81 can be set to a relatively large resistance value. 81
By setting the resistance value to a small value, the capacitor 80 can be fully charged the moment the washer switch 1 is operated.

Reference numeral 9 denotes a second time limit circuit, which is composed of a capacitor 90, resistors 91, 92, 93, a diode 94, and a transistor 95. Capacitor 90 and resistor 91 are connected in parallel, one of each is connected to the positive electrode of DC power supply 3, and the other of each is connected to the anode of diode 94 via resistor 92. The cathode of the diode 94 is connected to the other side of the watch switch 1 through the resistor 93, and also to the base of the transistor 95, whose emitter is connected to the other side of the watch switch 1, and whose collector is connected to the other side of the watch switch 1. transistor 61
connected to the base of Capacitor 90 becomes resistor 9 when watch switch 1 is turned on.
2. It is gradually charged via the diode 94, resistor 93, and watch switch 1. The charging current at that time turns on the transistor 95, and forms a circuit for inhibiting the operation of the wiper motor 4 by lowering the base potential of the transistor 61 until the washer switch 1 is turned off. At this point, if you continue to turn on the watch switch 1, the capacitor 9 will turn on.
0 is fully charged and transistor 9 is fully charged as described below.
The base-emitter voltage of transistor 95 is
The voltage becomes lower than the ON voltage of , and the operation blocking circuit of the wiper motor 4 is released.

The washer-linked wiper operating device according to the present invention has the above-described structure and operates as follows.

When the watch switch 1 is OFF, the cathode side of the diode 83 and the cathode side of the diode 94 are at the same potential as the positive side of the DC power supply 3, so a circuit for charging the capacitors 80 and 90 is not formed, and the capacitors 80 and capacitor 90 are in an uncharged state. Therefore, transistors 60, 61, and 95 are in a non-conducting state, relay 63 is not activated, and wiper motor 4 is deactivated. Also, of course, the washer motor 2
is also out of operation.

Next, when the washer switch 1 is turned ON, the washer motor 2 starts operating, and the second time limit circuit 9 is connected to the resistor 92, the diode 94, and the resistor 9.
3. Transistor 95 and watch switch 1
Capacitor 90 immediately begins charging via . Therefore, transistor 95 is also immediately turned on at the same time. In addition, the watch switch 1
When turned on, the cathode side of the diode 83 in the first time limit circuit 8 becomes ground potential, and the capacitor 80 immediately starts charging via the charging time setting resistor 81, the diode 83, and the watch switch 1. In this case transistor 60
is after a delay time has elapsed until the base potential of the transistor 60 drops to a level that allows conduction between the emitter and base as the capacitor 80 progresses charging based on the charging time constant with the charging time setting resistor 81. Conduct. Thus, when the watch switch 1 is turned on, the transistor 95 always becomes conductive before the transistor 60. Therefore, the transistor 60
The current drawn from the collector side of the transistor 95 flows to the ground via the resistor 62, the collector and emitter of the transistor 95, and the watch switch 1. Therefore, the transistor 61 remains in a non-conducting state,
Wiper motor 4 is not activated.

However, if the watch switch 1 is turned off now, the cathode sides of the diodes 83 and 94 will again have the same potential as the positive side of the DC power supply 3, and no charging current will flow through the capacitors 80 and 90.

Thus, the transistor 60 remains in the ON state until the charge stored in the capacitor 80 is completely discharged. Also, at this time, the transistor 95
Since the transistor 60 is turned off, the current drawn from the collector side of the transistor 60 flows between the base and emitter of the transistor 61 via the resistor 62, and the transistor 61 is turned on.

Therefore, the relay coil 63a is energized, the movable contact piece 63b contacts the fixed contact 63d, and the wiper motor 4 is energized via the movable contact piece 5a and the fixed contact 5b of the wiper switch 5, and the movable contact piece 63b and the fixed contact 63d of the relay 63. and starts operating. When the electric charge stored in the capacitor 80 is completely discharged, the transistors 60 and 61 become non-conductive, the relay 63 returns to its original state, and the wiper motor 4 is stopped at a predetermined position by the operation of the automatic stop switch 7.

The operating time of the wiper motor 4 is determined by the amount of charge charged in the capacitor 80. That is, if the resistance value of the charging time setting resistor 81 is made relatively large, the capacitor 80 is charged with an amount of charge corresponding to the ON time of the washer switch 1. In other words, the operating time of the wiper motor 4 can be changed depending on the ON time of the washer switch 1.

Furthermore, if the resistance value of the charging time setting resistor 81 is set to a small value, the capacitor 80 can be fully charged the moment the washer switch 1 is turned ON, and the wiper motor 4 will operate regardless of the ON time of the washer switch 1. You can make the time constant.

By the way, when the windshield is heavily soiled, the driver turns on the washer switch 1 for a long time to release a large amount of washer fluid onto the windshield.
However, in the present invention, the second timer circuit 9
Since it is equipped with
When the time exceeds a predetermined time, the wiper motor 4 is automatically activated to prevent the visibility from being obstructed for a long time.

The operation will be explained below.

At the beginning of the ON operation of the watch switch 1, the transistor 95 is conductive for a predetermined period of time due to the charging current to the capacitor 90, and the transistor 61 is turned on for a predetermined period of time.
The wiper motor 4 is prevented from operating by maintaining the non-conducting state.

However, when the capacitor 90 is fully charged after a predetermined period of time has elapsed, the impedance of the capacitor 90 becomes large, and the current flows through the path of the resistor 91, resistor 92, diode 94, resistor 93, and watch switch 1. Here, the transistor 95 is the resistor 93
By setting the resistance value so that the voltage across the transistor 95 is lower than the base-emitter voltage of the transistor 95, the transistor 95 becomes non-conductive. transistor 9
Since no current flows to the base of transistor 5, transistor 95 automatically becomes non-conductive, and the non-conductive state of transistor 61 is released.

Transistor 60 is rendered conductive by the charge stored in capacitor 80, and transistor 61 is rendered conductive by the current drawn from its collector. Therefore, relay 63 is activated, and capacitor 8
The wiper motor 4 operates until the zero charge is completely discharged.

The washer-linked wiper operating device according to the present invention operates as described above. Its operation is as shown in the time chart of FIG.

In FIG. 2, the waveform a indicates the ON time of the watch switch 1, and the waveform b indicates the operating time of the wiper motor 4 when the resistance value of the charging time setting resistor 81 is set to a relatively large value. The waveform indicated by c shows the operating time and timing of the wiper motor 4 when the resistance value of the charging time setting resistor 81 is set to a small value.

Therefore, capacitor 80, charging time setting resistor 8
If the values of the wiper motor 1 and the discharge resistor 82 are appropriately selected, the waveform shown by a in FIG. It can be made proportional to the operating time of the push switch 1. In addition, if the values of the capacitor 80, the charging time setting resistor 81, and the discharging resistor 82 are selected appropriately, the wiper motor 4 will be activated when the washer switch 1 is operated within a certain set time. The time is proportional to the operation time of the watch switch 1, but if the watch switch 1 is operated beyond a certain set time, the operation time of the wiper motor 4 after the watch switch 1 is turned OFF is changed. It can also be set constant.

As is clear from the above description, the washer-linked wiper operating device according to the present invention combines a first timer circuit and a second timer circuit that are linked to the operation of the washer switch to an amplifier circuit unit that operates the wiper motor. Therefore, if the operating time of the washer switch exceeds a predetermined time, the wiper motor can be automatically operated.

Therefore, by turning on the washer switch and then starting the wiper motor when the washer switch is turned off, you can freely set the timing to start wiping, and when the wiper surface is extremely dirty, etc. Washer liquid is squirted out for a required period of time depending on the degree of dirt and then wiped to ensure sufficient cleaning.In addition, when a large amount of washer liquid is released onto the windshield, the visibility obstruction caused by the washer liquid can be immediately removed. Contribute to accident prevention. Furthermore, by setting the resistance value of the charging time setting resistor in the first time limit circuit to a relatively large value, the operating time of the wiper motor can be changed according to the operating time of the washer switch. By setting a small value, the operating time of the wiper motor can be made constant regardless of the operating time of the washer switch. Further, since it is only necessary to add the first time limit circuit and the second time limit circuit to the circuit that operates the wiper motor via the amplifier circuit section, the configuration is relatively simple.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing a preferred embodiment of the washer-linked wiper operating device according to the present invention, and FIG. 2 is a time chart illustrating the operation of the washer-linked wiper operating device according to the present invention. DESCRIPTION OF SYMBOLS 1... Washer switch, 2... Washer motor, 4... Wiper motor, 6... Amplifier circuit section, 8... First time limit circuit, 9... Second time limit circuit, 80... Capacitor, 81... ...Resistor for charging time setting, 82...Resistor for discharging.

Claims (1)

[Scope of utility model registration request] A washer switch that operates the washer motor, an amplifier circuit that operates the wiper motor, and an amplifier circuit that operates the wiper motor for a predetermined time in response to the operation of the washer switch, which is interposed between the amplifier circuit and the washer switch. A first timer circuit that outputs an output to the amplifying circuit section for operation, and a circuit that is interposed between the amplifying circuit section and the watch switch to prevent the wiper motor from operating when the watch switch is turned on. A washer-linked wiper operating device comprising: a second time limit circuit that releases the wiper motor operation blocking circuit when a washer switch is turned off and turned on for a predetermined period of time or more.