JPH0235829B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power window control device for an automobile.

Generally, from the standpoint of safety, the power windows of automobiles can only be operated when the ignition switch is on, that is, when the driver is inside the vehicle. However, there are cases where it is necessary to operate the window even after the ignition switch is turned off, for example when you try to open the door when getting out of the car, or if you notice that the window is open after getting out of the car. In that case, it is necessary to turn the ignition switch on again, making the operation extremely cumbersome.

For such problems, for example,
There is an idea related to a "vehicle power window device" disclosed in Japanese Patent No. -91868. This invention consists of an ignition switch, a timer that detects when the ignition switch is switched from on to off and turns on for a predetermined period of time, and a power supply that supplies battery power to the power window motor via the timer. It is characterized by having a window switch. According to this, even after the ignition switch is turned off, the power window can be operated for a certain period of time set in the timer. However, even with this invention, if the driver stays in the vehicle for a while after turning off the ignition switch and then tries to get out of the vehicle and notices that the window is open, the above-mentioned certain period of time has elapsed. Sometimes you have to turn on the ignition switch again.

The present invention addresses the above-mentioned problems regarding power windows of automobiles, and the present invention continues to operate the power windows for a certain period of time after the door is opened after the ignition switch is turned off. The structure is configured so that it can be carried out. As a result, even after the ignition switch is turned off, the power windows can be operated until the door is opened to exit the vehicle, regardless of the elapsed time, and for a certain period of time after the door is opened. This eliminates the hassle of having to turn on the ignition switch again to operate the windows.

That is, the power window control device according to the present invention includes a power window drive means connected to a power source via an operation switch and an opening/closing means, an ignition switch, a door switch for detecting opening/closing of a door, and the ignition switch. It inputs signals from the ignition switch and door switch, and outputs a power supply signal regardless of the signal from the door switch when the on signal from the ignition switch is input.
and a power supply control circuit that continuously outputs the power supply signal until the signal from the ignition switch is switched to an off signal and a certain period of time set in a timer has elapsed after the door open signal from the door switch is input. , characterized in that the opening/closing means is configured to be moved to close by a power supply signal from the power supply control circuit. As a result, even after the ignition switch is turned off, the power window can continue to be operated until a certain period of time has elapsed since the door was opened, and the above object is achieved.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

As shown in FIG. 1, a reversible motor 1 provided as a power window drive means is connected to a power source 4 via a manual operation switch 2 and a relay 3. The operation switch 2 has a power supply side contact 5a
and a ground side contact 5b, and a movable contact piece 5d that connects one terminal 5c on the motor side to either of them, and a power supply side contact 6a, a ground side contact 6b, and one of the terminals on the motor side. and a movable contact piece 6d to which the other terminal 6c of the second switch 6 is connected. The movable contact pieces 5d, 6d of the first and second switches 5, 6 are interlocked, and the motor stop position, where both the motor-side terminals 5c, 6c shown in the figure are not connected to any contact, and the first The terminal 5c of the switch 5 is connected to the power supply side contact 5a, and the second switch 6
The motor normal rotation position (or reverse rotation position) where the terminal 6c is connected to the ground side contact 6b, and the first
Terminal 5c in switch 5 is ground side contact 5b
Then, the terminals 6c of the second switch 6 are switched to the motor reverse rotation position (or normal rotation position) where the terminals 6c are respectively connected to the power supply side contacts 6a. This controls the stopping, raising, or lowering of the window. Further, the relay 3 includes an opening/closing part 7 interposed between the power supply side contacts 5a, 6a of the operation switch 2 and the power supply 4, and a coil part 8 that closes the opening/closing part 7 when excited. The section 8 is excited by the power supply signal a output from the power supply control circuit 9.

However, the power supply control circuit 9 outputs a low level "L" signal only when the two input signals are both high level "H", and outputs a high level "H" signal in other cases. a flip-flop circuit 10 formed by combining two NAND circuits,
It is constituted by a NOT circuit 11 provided at the set signal input section of the flip-flop circuit 10, and a timer 12 provided at the output section of the flip-flop circuit 10. The first NAND circuit 10a in the flip-flop circuit 10
The signal b from the ignition switch 13 is inverted by the NOT circuit 11 and input as a set signal c, and the output signal d of the second NAND circuit 10b is input.
is input to the second NAND circuit 10b, and
A reset signal e from a door switch 14 that detects the open/closed state of the door and an output signal f from the first NAND circuit 10a are input. Here, the reset signal e from the door switch 14 is set to a high level "H" when the door is closed, and to a low level "L" when the door is opened. The output signal f of the first NAND circuit 10 is input to the timer 12, and the output signal of the timer 12 is the power supply signal a that is output from the power supply control circuit 9 to the relay 3.

The timer 12, when the input signal f switches from low level "L" to high level "H",
Output signal a immediately switches from low level "L" to high level "H", but when input signal f switches from high level "H" to low level "L",
The output signal a switches from the high level "H" to the low level "L" when a predetermined period of time has elapsed from the time of switching. This will be explained based on a specific circuit example shown in FIG. First, when the input signal f switches from low level "L" to high level "H", the transistor T1 to which the signal f is inputted to the base is fired, and the power supply 4
A current flows through the circuit from the resistor R1 to the ground through the resistor R1 and the transistor T1, so that the resistor R
The base voltage of the transistor T2 whose base is connected between the transistor T1 and the transistor T1 through the resistor R2 drops, and the transistor T2 is turned off. Therefore, the circuit from the power source 4 to ground via the resistor R3 and the transistor T2 is cut off, and the voltage on the power source 4 side of the transistor T2 increases. As a result, the output signal a output from between the transistor T2 and the resistor R3 is switched from the low level "L" to the high level "H". On the other hand, when the input signal f switches from a high level "H" to a low level "L", the transistor T1 is turned off, so that the capacitor C is charged to the transistor T1. When the charging voltage of the capacitor C rises above a certain level, the transistor T2
ignites, and a current flows through the circuit from the power supply 4 to ground via the resistor R3 and the transistor T2. Therefore, the voltage between the transistor T2 and the resistor R3 drops, and the output signal a switches from the high level "H" to the low level "L". At this time, the switching of the output signal a is delayed by a fixed time determined by the values of the capacitor C and the resistor R1 from the switching of the input signal f.

Next, the operation of the above example will be explained with reference to the timing chart of FIG.

First, when the car is stopped without a driver, the output signal f of the flip-flop circuit 10 in the power supply control circuit 9 or the timer 1
2 output signal (power supply signal) a is low level “L”
It is. At this time, the flip-flop circuit 10
Since the low level "L" signal f is input to the second NAND circuit 10b in
The output signal of the 2NAND circuit 10b, that is, the first NAND
One input signal d of the circuit 10a is at a high level "H", and the other input signal (set signal) c of the first NAND circuit 10a is also at a low level "L" when the ignition switch 13 is turned off (signal b is at a low level "L"). ”), so the high level is “H”. In other words, the two input signals c,
d are both at high level "H", therefore, the corresponding
1NAND circuit 10a output signal f or power supply signal a output from timer 12 to relay 3
is held at low level "L". In this state,
When the driver opens the door to get into the vehicle, one input signal (reset signal) e of the second NAND circuit 10b output from the door switch 14 changes from high level "H" to low level, as shown by arrow A in FIG. The level changes to "L", but depending on this change, the corresponding
The output signal d of the 2NAND circuit 10b does not change, and therefore the output signal f of the first NAND circuit 10a, that is, the power supply signal a, remains at the low level "L". Furthermore, even if the reset signal e is switched to high level "H" by closing the door,
The power supply signal a is held at low level "L". Therefore, during this period, the coil portion 8 of the relay 3
is not energized and the opening/closing part 7 of the relay 3 is in an open state, making it impossible to operate the power window.

After that, when the driver gets in the car and turns on the ignition switch 13, the signal b switches to a high level "H" as shown by the arrow B in FIG. 10
One input signal (set signal) c of the first NAND circuit 10a becomes low level "L", and accordingly, the output signal of the first NAND circuit 10a,
That is, the input signal f of the timer 12 becomes high level "H". In the timer 12, when the input signal f switches from low level "L" to high level "H", the output signal a also instantly switches from low level "L" to high level "H". Therefore, after the ignition 13 is turned on, the power supply signal a is immediately output to the relay 3, the coil section 8 of the relay 3 is excited, and the opening/closing section 7 is closed, and the connection between the power source 4 and the operating switch 2 is is connected. As a result, the motor 1 becomes operable by operating the operating switch 2, and by operating the switch 2 to the normal rotation position or the reverse rotation position, the window is raised or lowered. When the ignition switch 13 is on, the
Since one input signal c of the 1NAND circuit 10a is always at a low level "L", the second NAND circuit 10
Regardless of the state of the input signal b, that is, whether the door is open or closed, the output signal f or the power supply signal a of the first NAND circuit 10a is maintained at a high level "H", and the relay 3 is in the energized state. You can operate the windows at any time while driving.

However, when the driver finishes driving and turns off the ignition switch 13, the output signal b of the switch 13 switches to low level "L" as shown by arrow C in FIG. Then, one input signal (set signal) c of the first NAND circuit 10a is switched to a high level "H". However, at this point
Unless one input signal f of the 2NAND circuit 10b is at a high level "H" and the other input signal (reset signal) e is a high level "H" unless the door is opened, the output of the second NAND circuit 10b is Since the signal d is held at the low level "L", the first NAND circuit 10a receives one input signal c.
Although the input signal d is switched to the high level "H", the output signal f is kept at the high level "H" because the other input signal d is the low level "L". In other words, even after the ignition switch 13 is turned off, until the door is opened, the input signal f of the timer 12 or the power supply signal a from the timer 12 to the relay 3 is held at a high level "H", and the relay 3 is closed. You can continue to operate the window.

When the ignition switch 13 is turned off and the door is opened to exit the vehicle, one input signal (reset signal) e of the second NAND circuit 10b goes to a low level "L", as shown by arrow D in FIG. ”, the output signal d of the circuit 10b becomes high level “H”, and when the ignition switch 13 is turned off, the set signal c becomes high level “H”. The two input signals c and d of the circuit 10a both become high level "H". Therefore, the first NAND circuit 1
The output signal of 0a, that is, the input signal f of the timer 12
becomes a low level "L", but in this case, the output signal a of the timer 12 does not immediately switch to a low level "L", but as shown by arrow H in FIG.
After a certain period of time t has elapsed after the input signal f is switched, it is switched to the low level "L". As a result, the power supply to the relay 3 is stopped for the first time, and the power window becomes inoperable.

As described above, according to the present invention, even after the driver turns off the ignition switch when getting out of the car, the power windows can be operated until a certain period of time has passed after opening the door. Become. As a result, if you try to open the door when getting out of the car and notice that the window is open, regardless of how much time has passed since you turned off the ignition switch, or after opening the door or exiting the car, Even if the driver realizes that the window is open after exiting the vehicle, it is possible to operate the window for a certain period of time without having to turn the ignition switch on again. This eliminates the trouble in such a case.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of a timer in the embodiment, and FIG. 3 is a timing chart showing the operation of the embodiment. 1...Power window drive means (motor), 2
...Operation switch, 3...Opening/closing means (relay),
4...Power supply, 9...Power supply control circuit, 12...Timer, 13...Ignition switch, 14...
...Door switch.

Claims (1)

[Claims] 1 A manual power window drive connected to a power source via an operating switch and an opening/closing means, an ignition switch, a door switch that detects the opening/closing of the door, and inputting signals from the ignition switch and door switch. , when an ON signal is input from the ignition switch, a power supply signal is output regardless of the signal from the door switch, and
and a power supply control circuit that continuously outputs the power supply signal until the signal from the ignition switch is switched to an off signal and a certain period of time set in a timer has elapsed after the door open signal from the door switch is input. . A power window control device for a motor vehicle, characterized in that the opening/closing means is configured to close in response to a power supply signal from the power supply control circuit.