JPH0569954B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a window device for an automobile, and particularly to a power window device.

[Prior art]

In general, automobile power window devices operate a power window switch inside the vehicle to drive a power window motor to automatically raise and lower the window glass. For example, if the power supply to the power window motor is stopped immediately after the ignition switch is turned off, the driver may notice that the windshield is open after the ignition switch is turned off. In such cases, the window glass cannot be closed unless the ignition switch is turned on again, which is very troublesome.

Therefore, conventional power window devices include
As shown in Japanese Patent No. 56-146581, a timer means is used to enable power to be supplied to the power window motor for a certain period of time after the ignition switch is turned off, and the power window switch is operated in that state. When the power window motor is activated, the power window motor is activated, and the load current of the motor is detected and power is continued to be supplied to the power window motor even after the timer set time has elapsed, allowing the window glass to be raised or lowered to the desired position. It was hot.

However, in the device described in this prior art publication, since the load current of the power window motor is large, a reed switch is required to detect this large current, resulting in a problem of high cost.

[Purpose of the invention]

In view of this problem, the present invention aims to provide an inexpensive automobile window device that can operate the windshield to a desired position even after the ignition switch is turned off, without using an expensive reed switch or the like. It is something to do.

[Structure of the Invention] Therefore, the present invention controls the switch of the power window motor power supply circuit by the output of the timer means even if the ignition switch is turned off, so that power can be supplied to the power window motor during a set delay time, At that time, when the power window switch is turned on, the switch control means is operated by the current of the power window motor, and the operation of the power window motor is continued.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The drawing shows a motor vehicle window device according to an embodiment of the invention. In the figure, 1 is a power window motor that drives the driver's side window glass up and down;
2 is a power window switch installed near the driver's seat, and its first contact L, UP terminal (hereinafter referred to as U terminal) and second contact R, DOWN terminal (hereinafter referred to as D terminal), are connected to the battery power supply (hereinafter referred to as D terminal). The stationary terminals (hereinafter referred to as O terminals) of both contacts L and R are grounded, and the motor 1 is connected between the common terminal C of both contacts L and R.
And 3 is a motor power supply circuit configured as described above.

Reference numeral 4 denotes a first transistor, the base of which is connected to an ignition power source (hereinafter referred to as Ig power source) via a diode 5 and a resistor 6, and the collector connected to a B power source via a resistor 7. 8,9
are a resistor and a capacitor connected in parallel between the base of the first transistor 4 and the ground,
Reference numeral 10 denotes a timer circuit which is activated in response to an on signal from an ignition switch and outputs an output until a set delay time has elapsed from when the ignition switch was turned off.

Furthermore, 11 is a second transistor, the base of which is connected to the emitter of the first transistor 4 via a resistor 13, and the resistors 13, 1
4 and diodes 15 and 16 to the power supply end of the power window motor 1. 1
2 is a relay, whose relay coil 12a is connected in series with the second transistor 11 between the B power supply and ground, and the relay contact 12b, which is a switch of the motor power supply circuit 3, is connected in the middle of the motor power supply circuit 3. 17 is a resistor, and 18 is a capacitor.
19 is a switch circuit for opening and closing the motor power supply circuit 3, and 19a and 19b are control signal input terminals of the switch circuit 19 to which the output terminal 10a of the timer circuit 10 and the power supply terminal of the power window motor 1 are connected.

Next, the operation will be explained.

When the ignition switch is turned on, the Ig power supply is connected to the timer circuit 10, and the capacitor 9
is charged, and the first transistor 4 is turned on. Then, a current flows through the paths of the B power supply, the resistor 7, the collector/emitter of the first transistor 4, the resistor 13, the base/emitter of the second transistor 11, and the ground, turning on the second transistor 11, which connects the B power supply and the relay coil. 12a, the collector-emitter of the second transistor 11, and the ground, a current flows to turn on the relay contact 12b, thereby making the power window motor 1 ready for power supply.

When the knob of power window switch 2 is operated to the upward side in this state, the first
Contact L falls from the O terminal to the U terminal side, and current flows through the path of B power supply, relay contact 12b, first contact L, power window motor 1, second contact R, and ground, causing motor 1 to rotate forward. This causes the window glass to rise.

Conversely, when the knob of the power window switch 2 is turned downward, the second contact R falls from the O terminal to the D terminal, and the B power supply, relay contact 12b, second contact R, motor 1, first contact L, and A current flows through the ground path, causing the motor 1 to rotate in reverse, thereby lowering the window glass.

Next, when the ignition switch is turned from on to off, the power supply to the timer circuit 10 is stopped, but at that time, the charge in the capacitor 9 is discharged through the base-emitter of the first transistor 4 and the path of the resistors 13 and 17. As a result, since the base voltage of the first transistor 4 is initially higher than the emitter voltage, the first transistor 4 is kept on, and the second transistor 11 and the relay contact 12b are also kept on. When the set delay time elapses after the ignition switch is turned off, the base voltage of the first transistor 4 drops below the emitter voltage due to discharge of the capacitor 9, and the first transistor 4 is turned off and the second transistor 11 is turned off. This also turns off the relay contact 12b, thereby cutting off the connection between the motor power supply circuit 3 and the B power source. In this way, even if the ignition switch is turned off, the power window motor 1 is maintained in a state where power can be supplied during the set delay time.

If the power window switch 2 is operated after the ignition switch is turned off and before the set delay time has elapsed, the power window motor 1 is supplied with power as described above and rotates forward or reverse to open the window glass. Drives up and down. At this time, in the switch circuit 19, current flows from the power supply end of the motor 1 to the diode 15 or 16, the resistors 14 and 13, the base/emitter of the second transistor 11, and the ground, so the second transistor 11 is connected to the timer circuit. The motor 1 is maintained in the on state even after the set delay time has elapsed, so that the motor 1 continues to rotate even after the set delay time has elapsed after the ignition switch is turned off. When the windshield reaches a desired state, for example, a fully closed state, and the operation of the power window switch 2 is stopped,
The second transistor 11 is immediately turned off, the relay contact 12b is also turned off, and the connection between the motor power supply circuit 3 and the B power source is cut off.

The device of this embodiment as described above is very convenient because the window glass can be raised and lowered to a desired position even after the ignition switch is turned off. In addition, there is no need for an expensive reed switch to detect the motor load current, as is the case with devices described in conventional publications, resulting in significant cost reductions. , so the structure is not that complicated.

Although the above embodiment has been described with respect to a power window device on the driver's seat side, the present invention can of course be similarly applied to a power window device on a side other than the driver's seat side.

〔Effect of the invention〕

As described above, according to the automobile window device according to the present invention, after the ignition switch is turned off, the output of the timer means operates the switch control means for opening and closing the switch provided in the power window motor power supply circuit. The power window motor can be operated for a set time, and when the power window switch is turned on, the switch control means is operated intermittently by the power window motor current, so the ignition The window glass can be raised and lowered to a desired position even after the switch is turned off, and there is no need to use an expensive reed switch like the device described in the conventional publication, resulting in an effect of reducing costs.

[Brief explanation of drawings]

The drawing is a configuration diagram of an automobile window device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Power window motor, 2... Power window switch, 3... Power supply circuit, 10... Timer circuit (timer means), 12b... Relay contact (switch), 19... Switch circuit (switch control means).

Claims (1)

[Claims] 1. A power window motor that is powered and controlled by a power window switch to drive the window glass up and down, a switch control means that opens and closes a switch provided in the power supply circuit of the power window motor, and a switch that operates in response to an on signal from an ignition switch. and timer means for producing an output until a set delay time elapses after the ignition switch is turned off, and the switch control means has a transistor for controlling opening/closing of a switch provided in the power supply circuit, and the transistor A control signal input end is connected to an output end of the timer means and a termination end of the power window motor, and operates to close the switch when there is an output from the output end and the termination end. Automobile window device.