JPH0224991B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power window device for an automobile, and more particularly, to a power window device that can be operated for a certain period of time after an ignition switch is opened.

Generally, the power windows of automobiles consume relatively large amounts of power, and therefore, their function is stopped when the engine is stopped, that is, when the ignition switch is opened.

Figure 3 shows the circuit diagram of a conventional automobile power window.
is turned on, by turning on the operation switch MS, the drive motor M can be energized, making it possible to open and close the window. Note that the operation switch MS is always in an open state, and by turning it on either side, the direction of energization to the motor M is selected.
By changing the direction of rotation, the window can be opened or closed. Ba is battery.

However, with this device, if the engine is stopped with the window open, it becomes inoperable unless the engine is started again, so there is the inconvenience of having to perform this operation before stopping the engine. In particular, if the driver notices that the window has been opened after getting off the vehicle, it is necessary to get back in the vehicle and restart the engine, which is not suitable for the actual situation.

Therefore, this invention detects even if the engine is stopped with the window open,
This allows the window to operate for a certain period of time.

The present invention will be described below with reference to illustrated embodiments. Note that the same members as in the conventional example are indicated by the same symbols.

FIG. 1 is a circuit diagram for explaining the basic operation of the device of this invention. Reference numeral 1 denotes a logic circuit, and in this example, it is constituted by an exclusive OR circuit whose output becomes H level when the levels of its input terminals 1a and 1b are different, and whose output becomes L level when they are the same. 2 is a limit switch connected to the output of the logic circuit 1, which closes when the window is open and opens when it detects that the window is closed. 3 is a timer switch, which opens after a certain period of time when it detects that the ignition switch IG has been opened, that is, has stopped the engine, and closes it again to its original state when the ignition switch IG is turned on. . An operating signal is supplied to the logic circuit 1 by the delayed closing operation of the timer switch 3. Reference numeral 4 denotes an off switch that can be opened and closed manually, and is used to stop an open window from automatically closing when the ignition switch IG is opened. IGC is a load that receives electricity when the ignition switch IG is turned on, and in this embodiment, an ignition coil is shown. Line l is input terminal 1 of logic circuit 1 when ignition switch IG is opened.
This is a circuit for grounding the level of signal a through the load IGC and maintaining it at level L.

Therefore, when the ignition switch IG is turned on, the timer switch 3 is closed, so even if the off switch 4 is open, the input terminal 1a of the logic circuit 1 receives the signal from the line l. Since the input terminal 1b is at level H and the input terminal 1b is also at level H, the output of logic circuit 1 is at level L and remains inactive even if the window is open and limit switch 2 is closed. However, since it does not affect the operating switch MS, the window can be opened and closed freely using the operating switch MS. On the other hand, with off switch 4 turned on, the ignition switch
When IG is opened, the input terminal 1a of the logic circuit 1 is at level L, and the input terminal 1b is at level H since it is closed for the time set by timer switch 3, so this output becomes level H. Therefore, the drive motor M is energized until the window is closed and the limit switch 2 is opened.

After that, timer switch 3 is opened, and as a result,
Power to the logic circuit 1 is cut off to prevent battery Ba from being exhausted.

When the ignition switch IG is turned on again, the timer switch 3 is also closed, so the logic circuit 1
The output becomes level L and the automatic operation is stopped.

If the off switch 4 is left open, the drive motor M will not be energized at this point even if the ignition switch IG is opened, but the window can be closed by turning on the off switch 4. If the off switch 4 remains on, the drive motor M is energized until the window closes, but
By using the off switch 4, the power supply to the drive motor M can be arbitrarily controlled. Even in this case, there is no need to turn on the ignition switch IG, so there is no hassle.

FIG. 2 shows an actual circuit example of the device of this invention, in which the output of the logic circuit 1 is amplified by a transistor 5, and a relay 6 is interposed which is closed when this transistor is turned on. .

That is, the drive motor M is energized by operating the relay 6.

As explained above, this invention makes it possible to close the window for a certain period of time even when the engine is stopped, so even if you notice that the window has been opened after stopping the engine for parking, etc., you can still turn off the off switch. If the off switch is turned on, the window closes automatically, so no operation is required, and even if the off switch is left open, the off switch can be operated without starting the engine again. By using the off switch, it is also possible to make adjustments such as leaving the window slightly open.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram explaining the basic operation of the device of the present invention, FIG. 2 is a circuit diagram of the device of the invention, and FIG. 3 is a circuit diagram of a conventional device. 1...Logic circuit, 2...Limit switch, 3
...Timer switch, 4...Off switch,
IG...Ignition switch.

Claims (1)

[Claims] 1. A timer switch that detects the opening of the ignition switch and keeps it closed for a set time, and an off switch that cuts off the input from the timer switch on the input side so that output is sent only for the time set by the timer switch. and a limit switch that closes when the window is open and opens when the window is closed, and when the ignition switch is opened with the window open, the output of the logic circuit is 1. A power window device for an automobile, characterized in that the operation of a drive motor for closing a window is obtained when the window is closed.