JPH047438B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power window control device that automatically opens and closes the window glass of a vehicle.

(Prior Art) In a vehicle, power windows are, in principle, allowed to operate only when an ignition switch is in an on state to prevent battery over-discharge and protect the battery. However, in such vehicles, after turning off the ignition switch,
When the driver tries to close a window that he forgot to close, he has to turn on the ignition switch again, which is inconvenient.

Therefore, conventional power windows use a control device that allows operation for a predetermined period of time after the ignition switch is turned off. In such a control device, in order to prevent power consumption, it is desirable that the operation of the power windows be under the driver's control after the ignition switch is turned off.

(Problem to be solved by the invention) However, if there is a passenger in the vehicle, there is a high possibility that the passenger will still remain in the vehicle immediately after the driver turns off the ignition switch. There are many opportunities to operate the power windows, making it difficult to keep them under the complete control of the driver.

The present invention has been made in view of the above circumstances, and provides a control device that allows operation when there is a high possibility that a passenger has exited the vehicle after the ignition switch is turned off. The purpose is to prohibit third parties from operating the power windows.

(Means for solving the problem) A power window control device according to the first invention includes:
a detection means that detects that the ignition switch is in the off state and the door is open and outputs a detection signal; a timer means that starts driving based on the detection signal and continues the driving for a predetermined time; and the timer. and switch means for supplying power to the power window drive circuit only when the means is in the driving state, and when the ignition switch is in the off state and the door is in the open state,
In other words, the power window remains operable for a predetermined period of time after the passenger is considered to have gotten off the vehicle.

Further, the power window control device according to the second invention includes a detection means that detects that the ignition switch is in the off state and the door is in the open state and outputs a detection signal, and starts driving based on the detection signal. The structure includes a timer means for continuing the drive for a predetermined period of time, and a switch means for supplying power to the power window drive circuit only when the timer means is in the drive state and the door is open. Only when the door is open, within a predetermined period of time after the transmission switch is off and the door is open, that is, when the driver is considered to be near the driver's seat.
The power window becomes operable, reducing the chance that a third party other than the driver, such as a fellow passenger, operates the window, and the driver can monitor the operation of the third party.

(Example) An example of the present invention will be described below based on the drawings.

First, an embodiment of the first invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the control device of this embodiment has the following features:
A detection circuit (detection means) 1 that detects the off state of the ignition switch and the open state of the door, a timer circuit (timer means) 5 that is driven for a predetermined time based on the detection signal from the detection circuit 1, and a timer circuit The switch circuit (switch means) 7 supplies power to the power window drive circuit when the power window 5 is driven.

The detection circuit 1 is an ignition switch.
A transistor Tr ₁ is activated by the input signal when the IG is on, a door switch 2 is turned on when the door is closed and turned off when the door is opened, and the base is connected to the common side (body side) through this door switch 2. Transistor Tr ₂ that operates when Tr 2 is on, and NOT circuit 3
and a flip-flop circuit 4 constituted by a NAND circuit. The collector of one transistor Tr ₁ is directly connected to the input side of the flip-flop circuit 4, and is grounded through the collector resistor R ₁ of the other transistor Tr ₂ .
It is connected through circuit 3 to the other input side of flip-flop circuit 4. Therefore, when the ignition switch IG is in the on state, even if the door is opened, the output from the flip-flop circuit 4 becomes "high" and this state is maintained.
On the other hand, only when the ignition switch IG is turned off and the door is once opened, the output (detection signal) from the flip-flop circuit 4 becomes "low", and this state is changed to the next ignition switch. It is held until the switch IG is turned on.

The timer circuit 5 includes transistors Tr ₃ and Tr ₄ whose bases are grounded, an integrating circuit 6 consisting of a capacitor C and a resistor R ₂ , and a transistor Tr ₅ whose collector is grounded through a resistor R ₃ .
They are connected sequentially to the output side of the In this timer circuit 5, when the output from the detection circuit 1 changes from "high" to "low" and a detection signal is output, the transistor Tr ₃ stops operating, and accordingly, the transistor Tr ₄ enters the operating state. Predetermined time determined by the time constant of resistor R ₂ and capacitor C
T ₁ , the operating state of transistor Tr ₅ is maintained.

The switch circuit 7 includes a transistor Tr 6 whose base is connected to the collector of the transistor Tr ₅ through a NAND circuit 8, and a transistor Tr ₆ connected to the collector of the transistor Tr ₅ .
The excitation coil 10a of the relay 10 is connected to the common side via the diode 9 to the collector of the relay 10, and the contact 10b of the relay 10 is connected to the battery power supply (+B) and each operation switch 1 of the power window.
It is interposed between 1a, 11b, 11c, and 11d. Therefore, the ignition switch IG
Even when the timer circuit 5 is in the off state, if the timer circuit ₅ is in the operating state, the transistor Tr ₆ is in the operating state as the transistor Tr 5 is in operation, and accordingly, power is supplied to the excitation coil 10a of the relay 10, and the power window is activated. Each drive circuit operates each operation switch 11.
It becomes operable in steps a to 11d. On the other hand, in order to supply power to the excitation coil 10a when the ignition switch IG is on, a battery power supply (+B) is connected to the excitation coil 10a via the ignition switch IG. When the power window switch IG is on, that is, when the engine is running, each power window drive circuit is always operable.

In such a control device, when the ignition switch IG is on, power is constantly supplied to the excitation coil 10a of the relay 10 through the ignition switch IG, as shown in the time chart of FIG. The drive circuit becomes operational. When the vehicle is stopped and the ignition switch IG is turned off at time t ₁ ,
The timer circuit 5 does not operate until the door is opened for the first time after this. At time _t2 , when the ignition switch IG is in the OFF state and the door is in the open state, the timer circuit 5 starts operating. The timer circuit 5 operates for a time T ₁ up to a time t ₃ determined in advance by a time constant. Therefore, power is supplied to each power window drive device during the time that the timer circuit 5 is operating.
This is carried out only during T ₁ , and during this time T ₁ each drive device is ready for operation.

Further, from time _t4 to time _t5 in the time chart in the figure, the door is first opened and then the ignition switch IG is turned off. In this case as well, the time t ₄ when the door is open and the ignition switch IG is turned off.
The timer circuit IG starts driving for a predetermined time _T1 , and becomes operable during that time. Therefore,
It is possible to reduce the possibility that other occupants will open or close the window glass against the driver's will.

Next, an embodiment according to the second invention will be described with reference to FIGS. 3 and 4. Note that the same parts as in the previous embodiment are given the same reference numerals, and redundant explanation will be omitted.

The control device of this embodiment, as shown in FIG.
Between the bases of the transistor Tr 5 of the timer circuit ₅ and the transistor Tr ₆ of the switch circuit 7, a negation of the logical product of the output signal of the timer circuit 5 and the output signal of the transistor Tr ₂ of the detection circuit 1 for detecting the open/closed state of the door is connected. A NAND circuit 12 is provided. Therefore, the switch circuit 7 operates only when the timer circuit 5 is in the driving state and the door is in the open state, and each drive circuit of the power window becomes operable.

In such a control device, as shown in the time chart in FIG. 4, the timer circuit 5 starts operating when the ignition switch IG is in the OFF state and the door is in the open state, as in the previous embodiment. .
Furthermore, in the NAND circuit 12, the logical product of the output signal of the timer circuit 5 and the output signal of the transistor Tr ₂ for detecting the door open state is negated. Power is supplied only when the vehicle is in operation and the door is open. Also, from time t ₄
As shown at _t5 , even if the door is first opened and then the ignition switch IG is turned off, this is limited to the case where the timer circuit 5 is being driven and the door is open.

Therefore, it is possible to further reduce the possibility that another passenger will be able to operate the power window against the driver's will.

(Effects of the Invention) As is clear from the above description, in the first invention, the timer circuit starts driving when the ignition switch is in the off state and the door is in the open state, and while the timer circuit is being driven. Since the power window can be operated only when the driver is in the vehicle, the possibility of operation by another person against the driver's will can be reduced. In addition, in the second invention, since the power window can be operated only when the timer circuit is running and the door is open, the possibility of operation by another person can be further reduced. The degree of control by the person can be increased.

[Brief explanation of drawings]

1 and 2 relate to an embodiment of the first invention, FIG. 1 is a circuit diagram of the control device, FIG. 2 is a time chart showing its operation, and FIGS. 3 and 4 are the embodiments of the second invention. Regarding one embodiment, FIG. 3 is a circuit diagram of the control device, and FIG. 4 is a time chart showing its operation. In the drawings, 1 is a detection means, 5 is a timer means, 7 is a switch means, 11a, 11b, 11
c and 11d are operation switches, and IG is an ignition switch.

Claims (1)

[Claims] 1. A detection means for detecting that the ignition switch is in the OFF state and the door is in the open state, and a timer that starts driving based on the detection signal of this detection means and continues the driving for a predetermined period of time. What is claimed is: 1. A power window control device comprising: means for controlling a power window; and switch means for supplying power to a power window drive circuit only when the timer means is in a driving state. 2. A detection means for detecting that the ignition switch is in the off state and the door is in the open state; a timer means for starting driving based on a detection signal from the detection means and continuing the driving for a predetermined time; and this timer means. 1. A power window control device comprising: switch means for supplying power to a power window drive circuit only when the door is in a driving state and a door is in an open state.