JPS6121318Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a wiper motor that operates in conjunction with the operation of the washer switch.
This invention relates to a washer-linked wiper operating device that changes the operating time period corresponding to the ON time.

Conventionally, there is a device of this type that operates a wiper motor in conjunction with the operation of a washer switch.

However, when the washer switch is operated for ₁ hour, ₂ hours, or ₃ hours as shown in Figure 3a, the wiper motor is operated for 1 hour, that is, for _a constant time as shown in Figure 3b. It operated uniformly over time.

Therefore, in order to operate the wiper motor for the required time, the wiper switch had to be manually turned on and off without interlocking with the operation of the washer switch.

This operation is very troublesome, and it is practically difficult to operate the wiper motor for the required time. In recent years, the techniques disclosed in Utility Model Publication No. 52-20817 and JP Patent Publication No. 52-106531 have been disclosed, but in these, the wiper switch is turned on, and after a certain time has passed while the wiper fluid is being sprayed, the wiper motor starts and the wiper blades are operated.

However, if the wiper surface, such as the windshield surface, is extremely dirty, it may be easier to clean it by squirting the washer fluid for the required time depending on the degree of dirt and then operating the wiper blade. Since wiping is forcibly started after a predetermined amount of time has elapsed since the start of spraying, there is a drawback that it is difficult to remove dirt.

The present invention has been devised to overcome the drawbacks of the conventional washer-linked wiper operating device described above.

Hereinafter, a preferred embodiment of the washer-linked wiper operating device according to the present invention will be described in detail with reference to FIGS. 1 and 2.

FIG. 1 is an electrical circuit diagram showing the first embodiment,
1 is a washer motor.

One end of the washer motor 1 is grounded via a washer switch 2, and the other end is connected to the positive pole of a DC power source 3. Therefore, DC power supply 3
Since the negative pole of is grounded, the washer motor 1 is operated by turning on the washer switch 2.

4 is a wiper motor, one of which is connected to the positive electrode of the DC power supply 3, and the other to the movable contact piece 5a of the wiper switch 5. The fixed contact 5b of the wiper switch 5 is grounded. The wiper switch 5 is manually operated when the wiper motor is operated for a long period of time, such as during rainy weather.

6 is an amplifier circuit section, in which the first transistor 6
0, a second transistor 61, resistors 62, 63, and a relay 64. The first transistor 60 has its emitter connected to the positive electrode of the DC power supply 3, and its collector connected to the base of the second transistor 61 via a resistor 63. The emitter of the second transistor 61 is grounded, and the collector is connected to the positive electrode of the DC power supply 3 via the relay coil 64a of the relay 64. The relay 64 has fixed contacts 64b, 64c and a movable contact 64d, and the movable contact 64d is attracted when the relay coil 64a is excited, and the movable contact 64d is attracted from the fixed contact 64c to the fixed contact 64d.
Switching to 4b is activated.

In the relay 64, the movable contact piece 64d is connected to the fixed contact 5c of the wiper switch 5, and the fixed contact 64
b is grounded.

7 is a wiper motor automatic stop switch, the fixed contact 7a is connected to the positive electrode of the DC power supply 3, the movable contact piece 7b is connected to the fixed contact 64c of the relay 64,
The fixed contact 7c is grounded.

8 is a timer circuit, which has a configuration in which a capacitor 8a, a resistor 8b, and a diode 8c are connected in series, one of which is connected to the positive terminal of the DC power supply 3, and the other of the capacitor 8a is connected to one of the resistors 8b. The point is connected to the base of the first transistor 60 through the resistor 62, and the other end of the resistor 8b is connected to the connection point between the washer switch 2 and the washer motor 1 through the diode 8c. In the timer circuit 8, a capacitor 8a
is resistance 8b when watch switch 2 is turned on.
For example, the charging time is gradually charged through
The values of capacitor 8a and resistor 8b are selected to set the time to 10 seconds.

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

When the washer switch 2 is OFF, a circuit for charging the capacitor 8a is not formed, and the capacitor 8a is in an uncharged state. Therefore, no base current flows through the first transistor 60, and the first transistor 60 is turned off. Further, when the first transistor 60 is OFF, no current flows from the collector of the first transistor 60 to the base of the second transistor 61 via the resistor 63, and the second transistor 61 is also OFF. Therefore, the relay coil 64a is not excited, and the movable contact piece 64d of the relay 64 remains in contact with the fixed contact 64c. In addition, if the wiper switch 5 is not operated, the movable contact piece 5a of the wiper switch 5 is the fixed contact 5c.
, a circuit for energizing the wiper motor 4 is not formed, and the wiper motor 4 is inactive. Also, when the wiper motor 4 is OFF, the movable contact piece 7 of the wiper motor automatic stop switch 7
b is in contact with the fixed contact 7a.

Now, from this state, turn the watch switch 2 to the 3rd position.
When the power is turned on for up to _one hour as shown in Figure a, the washer motor 1 is energized and starts operating, and the capacitor 8a is energized via the resistor 8b, diode 8c, and washer switch 2, and starts charging.
Since the capacitor 8a cooperates with the resistor 8b to increase its charging time constant, the charging voltage is approximately proportional to the ON time of the watch switch 2. Therefore, when the charging voltage of the capacitor 8a exceeds the conduction potential of the first transistor 60, the first transistor 6
0 is turned on, the second transistor 61 is turned on based on the current derived from the collector of the first transistor 60, and the relay coil 64a is excited.

Based on the excitation of the relay coil 64a, the movable contact piece 64d of the relay 64 switches from the fixed contact 64c to the fixed contact 64b, and the wiper motor 4 switches between the movable contact piece 5a of the wiper switch 5, the fixed contact 5c, and the movable contact piece 64d of the relay 64. , fixed contact 64b
Electric power is supplied from the DC power supply 3 via the DC power source 3, and the operation starts.

Then, after _one hour has passed, turn on the watch switch 2.
When turned off, the charging circuit to the capacitor 8a is cut off, and the electric charge charged in the capacitor 8a is discharged via the resistor 62. This discharging time is approximately determined by the capacitance of the capacitor 8a, its charging voltage, and the value of the resistor 62. Since the capacitance of the capacitor 8a and the value of the resistor 62 have already been determined, the charging of the capacitor 8a is The voltage will determine the discharge time. The charging voltage of the capacitor 8a is determined by the voltage of the watch switch 2 as described above.
Since it is approximately proportional to the ON time, the time during which the washer switch 2 is ON is approximately proportional to the discharge time of the capacitor 8a.

In other words, the time the watch switch 2 is turned on is proportional to the time the first transistor 60 and the second transistor 61 are turned on.As a result, the time the watch switch 2 is turned on is proportional to the time the watch switch 2 is turned on. The operating time limit of the wiper motor 4 can be controlled. When the charge stored in the capacitor 8a is completely discharged, the first transistor 60 and the second transistor 61 are turned off, the relay 64 is reset, and the wiper motor 4 is activated when the wiper motor automatic stop switch 7 returns to the initial position. Stop automatically. The operation described above is based on the operation times a ₁ , a ₂ , a ₃ of the watch switch 2 shown in FIG. 3A, and the operation times c ₁ , c ₂ , c of the wiper motor 4 shown in FIG. 3C. ₃
As shown in the relationship with

Next, a second embodiment will be explained based on FIG.

The difference between the second embodiment and the first embodiment is that the operation of the wiper motor 4 is forcibly blocked while the washer switch 2 is turned on, and the wiper motor 4 is stopped when the washer switch 2 is turned off. A diode 9 is interposed between the base of the second transistor 61 and the watch switch 2 in order to operate it.

To explain the operation of the diode 9 now, when the washer switch 2 is turned on, the washer motor 1 is operated in the same manner as described above, and the capacitor 8a of the timer circuit 8 is charged. Then, the charging voltage of the capacitor 8a is applied to the first transistor 6.
If the conduction potential of 0 is exceeded, the first transistor 60
turns on, and attempts to turn on the second transistor 61 with its collector current.

However, there is a diode 9 between the watch switch 2 and the base of the second transistor 61.
, the base of the second transistor 61 is connected to the diode 9 and the watch switch 2.
Therefore, the second transistor 61 cannot be turned on. Therefore, the wiper motor 4 is not operated while the second transistor 61 is off. Then, when the watch switch 2 is turned off, the second transistor 6 is turned off.
Since the base of transistor 1 is no longer grounded, the second transistor 61 is immediately turned on by the collector current derived from the first transistor 60 and starts the wiper motor 4.

It goes without saying that there is a proportional relationship between the operating time of the wiper motor 4 and the ON time of the watch switch 2, and the operation of the second embodiment is similar to that of the watch switch shown in FIG. 2 operating times a ₁ , a ₂ , a ₃ and the wiper motor 4 shown in FIG. 3 d.
This is as shown in the relationship between the operating times d ₁ , d ₂ , and d ₃ .

Since the washer-linked wiper operating device according to the present invention has the above-described configuration and operation, it has the following effects.

(a) A timer circuit having a desired time constant operates the wiper motor in order to link the operation of the wiper motor with the operation of the washer switch and change the operating time of the wiper motor according to the ON time of the washer switch. Since the washer switch is interposed between the amplifying circuit section for the wiper motor and the washer switch, the operating time of the wiper motor can be controlled by operating the washer switch, making it extremely easy to control the operating time of the wiper motor.

(b) Connect the amplifier circuit and the washer switch to prevent the wiper motor from operating when the washer switch is ON, and turn the washer switch on.
Turn it on, and then turn on the washer switch.
By starting the wiper motor when the wiper motor is turned off, you can freely set the timing to start wiping, and when the wiper surface is heavily soiled, the washer fluid is ejected for the required period of time depending on the degree of dirt, and then wiping is performed. I can do it well.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing a first embodiment of the washer interlocking wiper operating device according to the present invention, FIG. 2 is an electrical circuit diagram showing a second embodiment of the washer interlocking wiper operating device according to the present invention, and FIG. Figure a is a waveform diagram showing the operating times a ₁ , a ₂ , and a ₃ of the watch switch.
FIG. 3b shows the operating time b 1 of the wiper motor that is activated when the washer switch is operated during the operating times a ₁ , a ₂ , and a ₃ shown in FIG. 3 _a in the conventional washer-linked wiper operating device. Waveform diagram shown in Figure 3c
are the operating times of the wiper motor that are activated when the washer switch is operated during the operating times a ₁ , a ₂ , and a ₃ shown in FIG. A waveform diagram showing c ₁ , c _{2 ,} c _{3 ,} and FIG. 3 d is a waveform diagram showing the operating times a 1 , c ₃ of the washer switch shown in FIG. _a2 ,
FIG. ₃ is a waveform chart showing the operating times d ₁ , d ₂ , and d ₃ of the wiper motor that are activated when the wiper motor is operated at step a 3 . 1... Washer motor, 2... Washer switch, 3... DC power supply, 4... Wiper motor,
5...Wiper switch, 6...Amplification circuit section, 7...
... Wiper motor automatic stop switch, 8 ... Timer circuit, 9 ... Diode, 60 ... First transistor, 61 ... Second transistor, 62, 6
3...Resistor, 64...Relay.

Claims (1)

[Scope of utility model registration request] In a washer-linked wiper actuating device which is intended to drive a wiper motor via an amplifier circuit section which operates based on the operation of a washer switch, the operating time of the wiper motor is changed according to the ON time period of the washer switch. A timer circuit having a desired time constant is interposed between the watch switch and the amplifier circuit, and the amplifier circuit and the watch switch are connected to each other in order to prevent the wiper motor from operating when the watch switch is ON. A washer-linked wiper operating device characterized by being connected to.