JPS6330164B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic window opening/closing device for a vehicle.

Automatic window opening/closing devices for vehicles have the convenience of being easily opened and closed by operating a switch, and are widely used, but there is still room for further improvement in drive means and safety.

FIG. 2 is a block diagram of a conventional automatic window opening/closing device, in which a signal from an operating section a is sent to a control section b to drive a motor M for opening and closing a window. Then, when the window is fully opened or fully closed, the rotation sensor c detects that the rotation of the motor M has stopped, and the operation of the control section b is stopped.

Therefore, the motor M requires a rotation sensor c and has a complicated configuration, and the rotation sensor c detects when the rotation of the motor M stops due to an excessive load. , If your hands, arms, etc. are caught, it is dangerous because the pressing force is strong.

The present invention eliminates the drawbacks of the conventional device, simplifies the mechanism, and eliminates danger.

For this purpose, the present invention immediately detects when an overcurrent flows through the motor that opens and closes the window, and stops energizing the motor.

Furthermore, in the present invention, a flip-flop circuit is used in the control circuit so that responses such as stopping the supply of electricity to the motor can be made quickly.

Therefore, there is no need for a rotation sensor to detect the rotation of the motor that opens and closes the window, and when the window is completely opened or closed, the power supply immediately stops, and even if someone gets caught in the window, a dangerous situation will not occur. It has the effect of not having any effect.

The present invention will be described below with reference to illustrated embodiments.

In FIG. 1, reference numeral 1 denotes an operating section for opening and closing a window of a vehicle, and is comprised of a main contact 1H that is manually switched and terminals 1a to 1d for switching. One end of the main contact 1H is grounded, and the terminal 1a is normally
It is in a neutral position where it is not inserted into any of the positions from 1d to 1d, and is of an automatic return type. Terminal 1a is for automatic closing, terminal 1b is for manual closing, terminal 1c is for manual opening, and terminal 1d is for automatic opening. When main contact 1H is applied to any of these terminals, terminals 1b and 1c are closed. The window opens or closes only as long as the opening is maintained. Furthermore, when the terminal 1a or 1d is connected, the opening or closing action of the window continues even after opening the main contact 1H, and as will become clear later in the explanation, it will automatically stop when it is completely opened or closed.

Reference numeral 2 denotes a control circuit which performs the above operations by operating the main contact 1H, and is comprised of the following components.
This configuration will be explained starting from the case of automatically opening and closing a window.

An inverter 2a receiving a signal from a terminal 1a, a flip-flop circuit (hereinafter referred to as FF circuit) 2b, a drive transistor 2c, a relay coil 2d connected in series to the transistor 2c, a relay contact d-1 and a relay terminal d.
-2, d-3;
The direction in which the motor 4, which serves as the power source for opening and closing the window, is energized is specified. One end of the relay contact d-1 is connected to the motor 4, and the other end is always located on the relay terminal d-2 side, and when the relay coil 2d is excited, it contacts the relay terminal d-3 and connects the motor 4. The energization direction is in the upward arrow direction and acts to close the window.

Inverter 2a', FF forming an automatic open circuit
The functions of the circuit 2b', the drive transistor 2c', the relay coil 2d', the relay contact d-1', and the relay terminals d-2' and d-3' are the same as in the case of the automatic closing circuit described above. . By energizing the relay coil 2d', the relay contact d-1' comes into contact with the relay terminal d-3', and the current direction of the motor 4 becomes the direction of the downward arrow, thus acting to open the window.

Next, the cases of manual opening and manual closing will be explained.

Circuit 2e is for manual closing of the window and is directly connected to one end of relay coil 2d, and when this coil 2d is energized, relay contact d-1 switches to relay terminal d-3 as in the case of automatic closing. , motor 4 acts to close the window.

The circuit 2e' is for manual opening of the window, and is directly connected to one end of the relay coil 2d', and when this coil 2d' is energized, the relay contact d-1' becomes the relay terminal d- as in the case of automatic opening. 3', the motor 4 acts to open the window.

Reference numeral 3 designates an overload detection circuit for the motor 4, which is composed of a resistor 3a connected in series to the current-carrying circuit of the motor 4, a reference voltage circuit 3b, and a voltage comparator 3c. It is set so that only when a current flows, the voltage drop that occurs here causes the voltage to be reversed and an output to be produced.

Reference numerals 5 and 5' denote gate circuits which open when an output is generated in the overload detection circuit 3 and have the function of resetting the FF circuit 2b or 2b'. Note that the gate circuits 5 and 5' are also opened by signals from the terminals 1b and 1c that are used when manually opening and closing the window using the operating section 1, and the gate circuits 5 and 5' operate in opposite directions when opening or closing the window. It is designed to prevent this from happening.

Next, the operation will be explained.

When the window is in an open state and the window is to be closed automatically, the main contact 1H of the operating section 1 is connected to the terminal 1a. That is, this causes a signal to enter the set input S of the FF circuit 2b via the inverter 2a, and an output is generated from the output terminal Q. As a result, transistor 2c operates and relay coil 2
d is excited and relay contact d-1 becomes relay terminal d-
Switch to 3. The motor 4 is energized in the direction indicated by the upward arrow and operates in the direction of closing the window. When the window is closed, an overcurrent flows through the motor 4 due to the resistance, and this state is detected by the resistance 3a of the overload detection circuit 3, and the voltage drop generated there causes a voltage comparison. The circuit 3c is inverted, and its output is sent to the FF circuit 2 via the gate circuit 5.
It acts on the reset terminal R of b and stops its operation. As a result, the transistor 2c is turned off, the excitation of the relay coil 2d is released, the relay contact d-1 returns to the position of the relay terminal d-3, and the rotation of the motor 4 is stopped.

In this way, connect the main contact 1H of the operating section 1 to the terminal 1a.
The effect of closing the window can be obtained by simply putting it into the container. In addition, the window is closed by detecting an overcurrent flowing through the motor 4, and when this current is detected, the FF circuit immediately responds and stops energizing the motor 4, so when the window is closed, Not limited to
For example, even when an arm or the like is pinched, a similar effect can be obtained, and dangerous detection can be avoided and the effect can be effective.

Next, in the case of opening the window, it is sufficient to connect the main contact 1H of the operation part 1 to the terminal 1d;
The operations of the FF circuit 2b', transistor 2c', etc. are the same as in the previous example. In this case, the motor 4 receives electricity in the direction indicated by the downward arrow and operates to open the window.

When opening/closing the window manually, use main contact 1H.
All you have to do is put it into either terminal 1b or 1c,
For example, if you want to open a window, relay coil 2d' is energized by inputting it to terminal 1c', relay contact d-1' is switched to relay terminal d-3', and motor 4
receives electricity in the direction indicated by the downward arrow, and acts like opening a window.

Note that when opening and closing the window manually, unlike the case of automatic operation, connect the main contact 1H to terminals 1b and 1.
It is necessary to put it into either of c and maintain that state.

Furthermore, if it is desired to stop the automatic opening/closing operation before the window is completely opened or closed, the main contact 1H may be connected to either terminal 1b or 1c. For example, if you want to stop it in the middle of closing, use the main contact 1H.
It is sufficient to instantaneously turn on the terminal 1c, and as a result, a reset signal is applied to the FF circuit 2b via the gate circuit 5, so that the window stops midway.

Even if an operation such as switching the opening or closing of a window from automatic to manual is performed instantaneously or repeatedly, when main contact 1H is connected to terminal 1b or 1c, FF circuits 2b and 2b' will always be closed. Since one side is reset, there is no possibility of malfunction.

As is clear from the above explanation, in the automatic vehicle window opening/closing device of the present invention, a signal from the operating section is received by flip-flop circuits provided in the opening direction and closing direction in the control circuit to drive the motor. death,
Furthermore, by using the output of the overload detection circuit that detects overcurrent of the motor to reset each of the flip-flop circuits and stop the motor, a rotation sensor or the like that detects the rotation of the motor can be used as in the conventional device. It is possible to detect and stop the fully open and fully closed stop positions as well as the pinching of an arm or the like using the same circuit without using the same circuit, which has the effect of simplifying the device. In addition, since any current fluctuation is detected and stopped immediately, that is, before the motor stops rotating, the risk of getting caught in the arm or the like is extremely low.

In addition, the control circuit is based on a flip-flop circuit, and this flip-flop circuit is set by a signal from the control circuit and reset by a signal from an overload detection circuit, so that it stores the current state and malfunctions. There are effects such as reliable operation without causing any problems, and also good responsiveness and high reliability.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional device. 1: Operation unit, 1H: Main contact, 1a, 1d: Terminal for automatic opening/closing, 1b, 1c: Terminal for manual opening/closing,
2: Control circuit, 2b, 2b': FF circuit, 3: Overload detection circuit, 4: Motor.

Claims (1)

[Claims] 1 Consists of a control circuit connected between the motor that opens and closes the window and the operating section, and an overload detection circuit that detects overcurrent flowing through the motor, and the control circuit is connected to the window in the opening direction from the operating section. The flip-flop circuit has a flip-flop circuit that is set in response to a signal to energize the motor in the opening direction, and a flip-flop circuit that is set in response to a signal from the operating section in the closing direction to energize the motor in the closing direction. and an automatic opening/closing device for a vehicle window, wherein each of the flip-flop circuits is reset to stop operation of the motor when the overload detection circuit detects an overcurrent in the motor.