JPS60189664A - Wiper controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wiper controller, and particularly to a wiper controller that allows fine adjustment of wiper speed and continuous fine adjustment of intermittent wiping time.

[Prior art]

A wiper controller controls a wiper device installed in a vehicle such as an automobile, and is most important when the vehicle is running in bad weather such as rain or snow.

The functions of wiper controllers commonly used in the past can be divided into three types: single-stage switching, two-stage switching, and three-stage switching.

The single-stage switching type controls only driving and stopping of the wiper motor by operating an on-off switch, and is the most primitive type.

Next, the two-stage switching type is further divided into two types, one of which switches between fixed period intermittent and fixed speed continuous, and the other switches between fixed speed low speed and fixed speed high speed. It is something.

Furthermore, the three-stage switch type is divided into two types, one of which is a single fixed, intermittent, low-speed and high-speed switch, and the other is a three-stage, intermittent switch.

It switches between slow and fast speeds.

However, since the wiper controller roller with the above configuration only switches preset conditions,
It is not possible to carry out individual controls that suit the driving conditions, causing problems in driving safety.

A double switch type is used to solve this problem. This double switch type is equipped with a first switch that controls the intermittent drive time and a second switch that switches between low and high speeds in continuous wiping. This allows stepless fine adjustment of the intermittent drive time. The wiper controller configured as described above performs stepless fine adjustment of the intermittent drive time to provide an optimal intermittent wiping time that matches the weather (rainfall amount) when the vehicle is running.

However, although the double switch type with the above configuration can perform stepless adjustment of the intermittent time, it cannot perform Fi-free adjustment of the wiping speed, so it has the problem that the wiping condition cannot be completely optimized. are doing. In addition, the above configuration requires two operations: the volume to adjust the intermittent time and the switch/7 switch to change the speed, which has the problem of complicating operations when driving the vehicle. . Furthermore, the above configuration has the problem that the number of wires between the wiper motor and the wiper motor is five, which is extremely large, and the motor also requires three carbon brushes.

[Summary of the invention]

An object of the present invention is to provide a wiper controller that allows stepless adjustment of the intermittent time and stepless adjustment of the wiping speed by simply operating a single operation switch.

Another object of the present invention is to provide a wiper controller that can have two wires connected to the wiper motor and two carbon brushes for the wiper motor.

In order to achieve such an objective, the present invention provides one IIT
By using an electronic circuit using a resistor and a thyristor, it is possible to perform intermittent and stepless adjustment of wiper wiping and stepless adjustment of speed during continuous wiping.

Hereinafter, it will be explained in detail using the drawings.

[Embodiments of the invention]

FIG. 1 and FIG. 2 are circuit diagrams showing one embodiment of a wiper controller according to the present invention, and the controller 10
The working voltage is supplied from the battery 11 via the car's main switch 12 and wiring (2). Here, when the wiper switch 13 is turned off, the wiper is no longer driven, and at this time the wiper motor 14 drives the mh
The conductive piece 16 provided on the reduction gear 15 becomes unable to ground the wiring (2) connected to the controller 10.

When the wiring (2) is no longer grounded, the potential at the point G increases, so that the transistor Q2 is turned off. (The transistor Q2 is used to return the wiper to the home position when the wiper switch 13 is opened or closed. At this time, when the transistor Q is off, the transistor Q1 that controls the wiper motor 14 is also turned off. Current cannot be supplied to the wiper motor 14 from the wiring ■, and the wiper becomes inoperable.The diode D protects the transistor Q1 by absorbing the back electromotive force generated from the wiper motor 14. It is provided.

Next, when the wiper switch 13 is turned on, the resistor R6
, R7-Ra-R9 and capacitors C1, C2 and transistor Q9. A multi-bye break circuit constituted by Q operates and outputs an oscillation signal. Here, when the emitter electrode of transistor Q is grounded, transistor Q is operated by a continuous oscillation signal output from point F of the multi-bye break circuit. transistor Q
The emitter electrode of , is grounded in the thyristor SC
This is the case when R is on and the wiring (2) is grounded via the conductive piece 16. Transistor Q4 controls transistor Q3, and transistor Q3 controls transistor Q, so transistor Q1 operates according to the output of transistor Q.

When the wiper switch 13 is turned on, power is supplied to the transistor Q2 via the diode D and the point G, so that the transistor Q2 is turned off. When the wiper is operating, the transistor Q2 turns off the wiper switch 13, which is on, because the thyristor SCR is in a conductive state, so the current flows from the wiring ■ to the thyristor SCH via the resistors R2 and R. Supply anode voltage.

Further, the divided voltage outputs of the resistors R2 and R5 cause the transistor Q2 to conduct, so that the transistor Q1 continues to be conductive. At this time, the current in the wire (2) flows through the coil 17 provided inside the wiper motor 14, so the wiper motor 14 is driven and the wiper performs the wiping operation. Here, when the wiper motor 14 rotates,
When the conductive piece 16 provided on the reduction gear 15 mounted on the output shaft moves and rotates to a certain position, the wiring (2) is grounded via the ground wire. While this wiring ■ is grounded, the wiper motor 14 continues to rotate and wipe the wiper, and the conductive piece 1
This continues until 6 is disconnected from the wiring ■ or the ground wire.

In addition, when the wiring ■ is grounded, 14 points are grounded via the diode D3, so the thyristor SCR
becomes non-conductive. When the thyristor SCR becomes non-conductive,
Since the l-1 point is the wire voltage, the transistor Q2
is turned off, and its output also turns off the transistor Q1, so that the power supply to the wiper motor 14 is stopped and the wiper stops at the normal position. In addition, resistance R3
is the base resistance of the transistor Q, and the diode D2 supplies the wire voltage to the point G when the wiper switch 13 is turned on, and prevents reverse current when the wiper switch 13 is turned off. The resistor R4 is for current limiting the base of the transistor Q to ground when the wiper switch 13 is turned on. Diode D3 is for protecting the Cyrisk SCR.

Here, looking at the conduction of the thyristor SCR, when the transistor Q7 becomes conductive, it triggers the date electrode, and when the wiring (2) is connected to ground, the thyristor SCR is turned off.

When the wiper wipes the wiring ■ once, the conductive piece 16 of the reduction gear 15 connects the contact ■ and the ground, so if the thyristor SCR is triggered continuously, the wiper will continue to perform the wiping operation. , the resistor R12 performs current limiting when the Zener diode Zl reaches a stable voltage,
Zener diode Z stabilizes the voltage at point A, and correspondingly stabilizes the voltage at points B and E. In this case, point B controls the intermittent time, and point E adjusts the speed of continuous wiping. Resistors R15, R16tR17 and variable resistor Vr (control the voltages at points B and E, and the potential at point B is controlled by resistor R14.
When the charging voltage reaches a predetermined value, the transistor Q becomes conductive, and
Since the thyristor SCR is triggered and turns on,
In order that sufficient current is supplied to the thyristor SCR by the diode D2 and the resistor R3 to maintain it in a normal state, the transistor Q 4 I Q 3 tQ l li
The ratio of the high potential and low potential of the signal output from point F determines the conductivity of the transistor Q1, which controls the rotation speed of the wiper motor 14, and when the wiper performs the wiping operation, the conductive piece 16 connects to the wiring When grounded, the thyristor SCR becomes cut-off and the wiper motor 14
The movement of the object is stopped at a fixed position by being stopped [-. When point H is at a low potential, capacitor C5
The charging output of is instantly discharged via diode D.

After that, the potential at point B is applied to capacitor C via resistor R14.
3, thereby repeating the above operation.

Next, when B7α increases by adjusting the variable resistor VR, charging of the capacitor C3 becomes faster.

Therefore, the intermittent time of the wiper is shortened, that is, the intermittent time is adjusted by the potential at point B, thereby increasing the voltage adjustable range at point B. Therefore, since the width of the intermittent time becomes large, the potential changes at points B and E when the variable resistor VR is turned can be designed as shown in FIG.

In other words, when the variable resistor VR is turned to Oo (B in Figure 1)
When the arrow at the point is turned to the leftmost position), the wiper is operated for the longest time, and when the angle is 140°, the voltage at point E becomes high enough to conduct the transistor Q7 through the diode I)5 and resistor R13. , the thyristor SCR is triggered continuously, and the transistors Q, , Q
,,Q, operates according to the F,α output, and the variable resistor ■R
When exceeds 140", the potential at point E increases further, so this potential at point E is transferred to capacitor C2 via resistor RIG. As a result, the potential at point F as the oscillation output of the multivibrator circuit increases. As the width of the high potential portion of the waveform becomes wider, the ratio of the on time to the off time of the transistor Q increases, so that the rotational speed of the wiper motor 14 increases.

In this way, since the E output increases in accordance with the clockwise rotation of the variable resistor VR, the amount of charge to the capacitor C2 that constitutes the multi-bye break circuit increases, and the on period of the transistor Q increases. Accordingly, the rotation of the wiper motor 14 is increased accordingly.

In the circuit configured in this way, the wiper motor 14 does not lack torque at medium and low speeds, and accordingly, the carbon brush 18 for high-speed setting
Fine adjustments are made between high speed and medium to low speed.

Diode D of the electric circuit in this part has a potential at point B of resistor Rl 4t diode D6 and resistor Rl
:l l R+ s is prevented from being connected to ground, and thereby the charging potential of capacitor C3 is insufficient, thereby preventing transistor Q7 from conducting.

Diode D6 changes the potential at point E to diode DS + resistor R.
13 to charge the capacitor C3, thereby creating a situation where continuous wiping is stopped. Therefore, one wiper switch 13 and a variable resistor V connected thereto are provided outside the controller 10.
By simply using R, it is possible to control the wiper on and off, and also to finely adjust the intermittent time, allowing it to be adjusted arbitrarily from tens of seconds to zero seconds. Also, the speed of continuous wiping can be finely adjusted as desired.

As explained above, the wiper control a-
2- Since the wiper speed can be continuously varied and the intermittent period of intermittent wiping can be easily varied by adjusting one variable resistor, the operation is flexible and easy, and any Even in heavy rain, wiping conditions suitable for the situation can be obtained. Furthermore, since the wiring between the wiper motor and the wiper motor is reduced to two, the structure is simplified and the structure is miniaturized, which has various excellent effects.

[Brief explanation of drawings]

1 and 2 are circuit diagrams showing an embodiment of a wiper controller according to the present invention, and FIG. 3 is a characteristic diagram of each part of the circuit shown in FIG. 1. 10... Controller, 11... Battery, 1
2... Main switch, 13... Wiper switch, 14... Wiper motor, 15... Gear shift gear,
16... Conductive piece, 17... Coil, Q, -Q7...
・Transistor, R1-R17...Resistor, VR...
Variable resistor, SCR...Thyristor, D1-D6...
・Diode, c1-c3...capacitor, Zl...
・Zener guide. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] Both ends of the resistor piece are connected to the first. a variable resistor that is grounded via a second resistor and whose movable piece is connected to a power source via the second resistor and a wiper switch; a third resistor that integrates the movable piece output of the variable resistor; When the potential across the capacitor and the first capacitor reaches the set value, and when the output voltage at the right rotation end of the variable resistor reaches the set value, it turns on and connects the power output to the thyristor. a first giode connected between the power supply side end of the first capacitor and the 7th node of the first Sairisk to rapidly discharge the first capacitor when the Sairisk is turned on; and the variable resistor. a multi-bye break circuit in which the on-output period of the oscillation output is varied by the clockwise rotation end output of the multi-bye break circuit, and a wiper motor controlled by the output of this multi-bye break circuit and one end connected to ground via the thyristor. A third transistor that controls the second transistor to be controlled and a movable contact provided on the transmission portion of the wiper motor ground the anode of the cyrisk and turn on the second transistor during a period in which the movable contact piece provided on the transmission portion of the wiper motor detects a fixed position. A wiper controller characterized in that a wiper controller is provided with a diode.