JP2000130016A - Power window device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an operation of a power window device even at the time of immersion in water of a vehicle, and to open or close a windowpane. SOLUTION: In the power window device, a means, in which switch signals at the off-time of each opening switch and closing switch are set to a high- potential level, switch signals at the on-time thereof are set to a low-potential level, and switch signals at the time of a short circuit by water between switch contacts under off state thereof are set to an intermediate potential level by using a resistance type potential dividing circuit, to which bias voltage is applied, is mounted, and a control unit reads the level of the switch signals of each switch, and the on-commands of other switches are received when the switch signal of either one switch is at the intermediate-potential level and also the switch signal of the other switch is at the low-potential level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window apparatus for opening and closing a window glass of a vehicle by driving a motor forward or backward according to a switch operation.

[0002]

2. Description of the Related Art Conventionally, a power window apparatus of this type has a motor for driving a window glass opening / closing mechanism, a relay for opening direction for turning on and off a power supply for forward rotation and a power supply for reverse rotation of the motor. A closing drive relay that performs closing and opening, and a control unit that controls the opening drive relay or the closing drive relay according to the ON / OFF operation state of the open switch and the close switch. It is configured.

[0003] In the conventional power window device constructed as described above, when the vehicle is submerged, both contacts of the open switch and the close switch are short-circuited at the same time. Cannot be driven.

[0004]

The problem to be solved is that in the conventional power window device, when the vehicle is submerged, the contacts of the open switch and the close switch are simultaneously short-circuited, and the switch is operated. Another problem is that the motor of the window glass opening / closing mechanism cannot be driven.

[0005]

SUMMARY OF THE INVENTION The present invention makes it possible to drive a motor of a window glass opening / closing mechanism by operating a switch even when both contacts of an open switch and a close switch are simultaneously short-circuited when a vehicle is submerged in water. In order to do this, using a resistive voltage dividing circuit to which a bias voltage has been applied, the switch signal when each of the open switch and the close switch is turned off is set to a high potential level, and the switch signal when each is turned on is set to a low potential level. Means for setting the switch signal at the time of short-circuit due to water between the switch contacts in each OFF state to the medium potential level is provided, and the control unit reads the level state of the switch signal of each switch, and the switch signal of one of the switches is set to the medium level. At the potential level, when the switch signal of the other switch is at the low potential level, an ON command for the other switch is issued. So that attach only.

[0006]

FIG. 1 shows an example of the configuration of an electric system in a power window device. In this example, a driving motor M for a window glass opening / closing mechanism and a + Vcc power supply are turned on and off with the polarity of the motor M rotating forward. With the polarity that the opening direction drive relay RY1 for removing and the motor M is reversed,
Relay R for closing direction drive that turns on and trips Vcc power
Y2 and the operation states of the open switch DOWN · SW and the close switch UP · SW are read, and the energizing of the open direction drive relay RY1 or the close direction drive relay RY2 is performed.
The control unit ECU appropriately controls deenergization.

When the open switch DOWN / SW or the close switch UP / SW is turned on,
Under the control of the control unit ECU, while the open operation is being performed, the open direction control signal OCS or the close direction control signal CCS is switched from the high level to the low level so that the open direction drive relay R
By energizing the relay coil of Y1 or the closing direction drive relay RY2, the motor M is driven forward or reverse to open or close the window glass.

In the circuit constructed as described above, in particular, in the present invention, the resistance voltage dividing circuits 1 and 2 in which the bias voltage + Vcc is applied to each system of the open switch DOWN · SW and the close switch UP · SW. Are provided, respectively, and an open switch DOWN SW and a close switch UP SW
The switch signal at the time of each OFF is set to the high potential level H, the switch signal at the time of each ON is set to the low potential level L, and the switch signal at the time of short circuit between the switch contacts in each OFF state is set to the medium potential level M. I am trying to do it.

Then, the control unit ECU reads the level state of each switch signal of the open switch DOWN SW and the close switch UP SW, and the switch signal of one of the switches is at the medium potential level M and the other switch is at the intermediate potential level M. When the switch signal is at the low potential level L, an ON command for the other switch is received.

According to the present invention, a submergence sensor S for detecting a submergence state by short-circuiting between contacts by water and an amplifier AMP for amplifying the sensor signal are provided, and the control unit ECU reads the sensor signal. On condition that the submersion state is detected, when the switch signal of one of the switches is at the medium potential level M and the switch signal of the other switch is at the low potential level L, the ON command of the other switch is given. To accept.

The portion A composed of the resistive voltage dividing circuits 1 and 2, the amplifier AMP and the control unit ECU is waterproofed.

The operation of the power window apparatus thus constructed according to the present invention when submerged in water will be described below together with the control flow in the control unit ECU shown in FIG.

First, it is determined whether or not the submerged state is detected by the submerged sensor S (step S1). When the submerged state is detected, the open and closed directions are set so that the window glass does not move freely when submerged. The open control signal OCS and the close control signal CCS are respectively switched to low level to output the respective drive control signals of the above, so that the open drive relay RY1 and the close drive relay RY2 are simultaneously energized. (Step S2).

Then, it is checked whether or not the switch signal of the closing switch UP / SW is at the M level (short state due to submergence) (step S3). If it is at the M level, then the opening switch DOWN is turned on. Check whether the switch signal switch of the SW is at the L level (ON state) (step S4).

At this time, if the switch signal of the open switch DOWN · SW is at the L level, the control signal for driving in the closing direction that has been output so far is invalidated.
The control signal CCS in the closing direction is switched to a high level to turn off the relay RY2 for driving in the closing direction, so that only the control signal for driving in the opening direction is output (step S).
5). Accordingly, the opening direction control signal OCS becomes low level, only the opening direction drive relay RY1 is energized, the motor M is driven to rotate forward, and the window glass is opened.

At the time of determination in step S4, the open switch DO
If the switch signal of WN · SW is not at the L level, the determination in step S4 is repeatedly performed with a predetermined control cycle.

If the switch signal of the closing switch UP / SW is not at the M level at the time of the determination in step S3, it is determined whether or not the switch signal of the opening switch DOWN / SW is at the M level. Step S
6).

At this time, if the switch signal of the open switch DOWN / SW is at the M level, then it is confirmed that the switch signal of the close switch UP / SW is at the L level (step S7). ), In order to invalidate the control signal for driving in the opening direction that has been output until then,
The control signal OCS in the opening direction is switched to a high level to deactivate the relay RY1 for driving in the opening direction so that only the control signal for driving in the closing direction is output (step S).
8). Accordingly, the control signal CCS in the closing direction becomes low level, and only the closing direction drive relay RY2 is energized, and the motor M is driven in reverse rotation to close the window glass.

As described above, according to the present invention, even when the vehicle is submerged, the opening switch DOWN / SW or the closing switch UP / SW reliably opens or closes the window glass according to the ON operation. Will be able to

[0020]

As described above, in the power window device according to the present invention, the switch signal at the time of turning off each of the open switch and the close switch is set to the high potential level by using the resistance voltage dividing circuit to which the bias voltage is applied. Means for setting the switch signal at the time of each ON to a low potential level, and setting the switch signal at the time of a short circuit due to water between the switch contacts in the OFF state to the medium potential level, and the control unit controls the level of the switch signal of each switch. By reading the state and receiving the ON command of the other switch when the switch signal of one of the switches is at the medium potential level and the switch signal of the other switch is at the low potential level, Even if both contacts of the open switch and the close switch are short-circuited at the same time when submerged, the open switch Other has the advantage that it is possible to surely perform the opening or closing of the window glass in accordance with the ON operation of the closed switch.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing a configuration example of an electric system in a power window device according to the present invention.

FIG. 2 is a diagram showing a flow of control when submerged in a control unit ECU.

[Explanation of symbols]

 M Motor RY1 Open direction drive relay RY2 Close direction drive relay DOWN / SW Open switch UP / SW Close switch ECU Control unit 1 Resistor voltage divider circuit 2 Resistance voltage divider circuit

Claims (2)

[Claims] 1. A driving motor for a window glass opening / closing mechanism, an open-direction driving relay for turning on and off a forward rotation power supply and a closing-direction driving relay for turning on and off a reverse rotation power supply to the motor. In a power window device configured by a control unit that controls an open-direction drive relay or a close-direction drive relay according to the on / off operation states of the open switch and the close switch,
Using a resistive voltage dividing circuit to which a bias voltage is applied, the switch signal when each of the open switch and the close switch is turned off is set to a high potential level, the switch signal when each is turned on is set to a low potential level, and each off state is set. Means for setting the switch signal at the time of short-circuit due to water between the switch contacts at the medium potential level, the control unit reads the level state of the switch signal of each switch, and the switch signal of one of the switches is at the medium potential level. A power window device, wherein when a switch signal of the other switch is at a low potential level, an ON command of the other switch is received. 2. A sensor for detecting a submerged state by short-circuiting between contacts with water is provided on condition that the submerged state is detected by the sensor.
2. The switch according to claim 1, wherein when a switch signal of one of the switches is at a medium potential level and a switch signal of the other switch is at a low potential level, an ON command for the other switch is received. Power window device as described.