JPH0649809Y2 - Automotive power window equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a power window device for automobiles,
The present invention relates to a power window device for a vehicle, which has excellent safety and immediately starts descending when a window glass reaches a top dead center while ascending by automatic control and a foreign object is caught before it is fully closed.

[Conventional technology]

The power window device that automatically raises and lowers the window glass by a motor has become very popular in recent years, centering on passenger cars.
50-59728, Jitsukai Sho 54-160710, etc. have already been proposed.

[Problems to be solved by the invention]

However, the conventional power window device operates automatically when the ignition switch is ON regardless of whether the vehicle is running or stopped.For example, after the driver leaves the child in the vehicle and leaves the vehicle while the vehicle is stopped, When a child being taken out puts his / her neck or hand out of the window in the driver's seat, the auto switch may be involuntarily input.In the worst case, the neck / hand may be caught and choking may occur. It was a big safety issue.

This invention is intended to solve this safety problem of the power window device for automobiles, and to detect whether the window glass has reached the top dead center or not, from the AND gate. With a down circuit configured, the automobile with excellent safety will start descending immediately when foreign matter such as hands, neck, fingers, etc. is caught by the automatic control and the foreign matter such as hands, neck, fingers is caught. A power window device for a vehicle is provided.

[Means for solving problems]

This invention is directed to a power window switch 1 for selecting whether to raise or lower a window glass, an auto switch 2 for performing an automatic control, a power window motor 3 for raising or lowering the window glass, and the power window. Motor 3
In a power window device for an automobile, which includes a control circuit unit 4 for controlling the driving of the vehicle, a position sensor 5 provided on the window glass lifting mechanism of the door 20 and turned off when the window glass reaches the top dead center, and the position sensor. 5 and a down circuit 7 consisting of an AND gate 6 for inputting a motor lock signal issued when the power window motor 3 is locked, and when the power window motor 3 is locked during automatic control, The output window from the AND gate 6 reverses the power window motor 3 to solve the above problem.

[Action]

When the power window switch 3 is set to the up side, the window glass is raised, and when it is set to the down side, the window glass is lowered.
By turning on the auto switch 2 at the same time as the operation of the power window switch 3, even if the power window switch 3 is released, the window glass reaches the top dead center or the bottom dead center by the automatic control and is fully closed or fully opened. Is driven until Then, when the window glass is rising by the automatic control and a hand, a neck, a finger or other foreign matter is caught in the window glass and the rotation of the power window motor 3 is locked, a motor lock signal is sent to the AND gate 6 of the down circuit 7. , This AND
A high level signal is emitted from the gate 6, which excites the down relay 12 and the power window motor 3
Starts reversing and the window glass descends automatically. The position sensor 5 detects whether the lock of the power window motor 3 has reached the top dead center or a foreign object has been caught. Without using the auto switch 2,
When the window glass is raised by operating only the power window switch 3, since the automatic operation detection signal is not input to the AND gate 6, a high level signal is not issued from the AND gate 6 and the power window motor No reversal of 3 will occur.

〔Example〕

FIG. 1 is a circuit diagram of an embodiment of a vehicle power window device according to the present invention, in which 1 is a power window switch, 2 is an auto switch, 3 is a power window motor, and 4 is a control circuit section. The power window switch 1 has a pair of selection contacts, one of which is an up-side contact 8 and the other of which is a down-side contact 9, and a common contact 10 is grounded. Further, 11 is an up relay, 12 is a down relay, one end of each exciting coil is connected to the selection contacts 8 and 9 of the power window switch 3, and the other end is connected to the battery 13. On the other hand, 3 is a forward / reverse rotatable power window motor for raising and lowering the window glass, and by opening and closing the up relay contact 14 and the down relay contact 15 interlocking with the up relay 11 and the down relay 12, The rotation direction is controlled. Further, 16 is an AND gate, and one of a pair of input terminals is connected to the battery via an ignition switch 17.
13 and the other are connected to the auto switch 2 via the NOT gate 18, and the output terminal thereof is connected to the input side of the up-down holding circuit 25 described later. The auto switch 2 is for automatically controlling the raising and lowering of the window glass, and as shown in FIGS. 2 and 3, the inside of the door armrest 21 provided on the inner wall of the door 20 on the driver side. It is preferable for safety reasons to prevent the window glass from suddenly starting to rise when a child or the like unknowingly touches it and enters automatic control.

Reference numeral 22 denotes an AC amplification circuit that amplifies brush noise generated when the power window motor 3 rotates, and is provided at both ends of a detection resistor 23 that is inserted in series with the power window motor 3. It is designed to increase the ripple voltage that is seen. The output signal of the AC amplification circuit 22 is sent to the up-down holding circuit 25 through the waveform shaping circuit 24.

Further, 26 is an up-down detection circuit, which is connected to the up-side input and the down-side input of the power window motor 3, and whether the power window motor 3 is rotating up or down. Is connected to the up / down holding circuit 25, and the up relay 11 is turned on during auto control when the auto switch 2 is turned on.
Alternatively, it keeps the excitation of the down relay 12. It should be noted that these are basically the same as the control circuit of the conventional power window device for automobiles, and there is no particular difference in the operation thereof.

Next, the position sensor 5 and the down circuit 7 will be described. The position sensor 5 has an ignition switch 17 at one end.
The battery 13 and the other end of the down circuit 7 are connected to the power supply paths of the operational amplifiers 29 and 32 and the AND gate 6, respectively, and the ON signal is output only when the opening / closing position of the window glass is not the top dead center as described later. Is configured to be introduced into the AND gate 6. In other words, the position sensor 5 is turned on when the open / close position of the window glass is not at the top dead center, and the down circuit 7 is turned on.
However, when the open / close position of the window glass reaches the top dead center, it is turned off to stop the power supply to the down circuit 7 and completely kill the function of the down circuit 7. As shown in FIG. 4, the position sensor 5 is attached to a window glass lifting mechanism 28 provided inside the door 20,
It detects whether or not the window glass reaches the top dead center.It detects the clearance of only a few mm or less at the fully closed position where the window glass reaches the top dead center, and the window glass reaches the top dead center. , Is turned off when fully closed, and is kept on in all other cases. Further, the AND gate 6 is provided with a position signal from the position sensor 5, a lock signal issued when the power window motor 3 is locked, an automatic operation detection signal issued when the automatic control is in operation, and an up relay. The up signals issued during excitation are also input. In the figure, 29 is an operational amplifier that inverts and widens the motor lock signal, 30 is a one-shot multivibrator that emits a pulse signal by using the output signal of the operational amplifier 29 as a trigger, 31 is an inverter that inverts the polarity of the up signal, and 32 is auto. It is an operational amplifier that increases the operating signal.

Further, the output terminal of the AND gate 6 is connected to the base of the transistor 33, and when a high level signal is input from the AND gate 6, the collector and the emitter of the transistor 33 become conductive and are connected to this collector. A current flows from the battery 13 to the down relay 12 that is present, is excited, and the power window motor 3 reverses to the down side. In the figure, 33 is a noise absorbing capacitor, 3
4,35 and 36 are transistors that perform a switching action.

Next, the operation of the vehicle power window device according to the present invention will be described.

When the power window switch 1 is set to the up side and the auto switch 2 is turned on at the same time, the up relay 11 is excited, the up relay contact 14 interlocked with this is turned on, and the power window motor 3 rotates to the up side. , The window glass starts to rise. With the rotation of the power window motor 3, a motor current flows through the detection resistor 23, and a ripple voltage due to brush noise is generated. This ripple voltage is amplified by the AC amplification circuit 22, shaped by the waveform shaping circuit 24, and sent to the up / down holding circuit 25, whereby the up side of the output is held ON and the power window switch 1 is turned OFF. However, the up relay 11 remains excited and the power window motor 5 continues to rotate.

Then, when the window glass rises to the top dead center and the rotation of the power window motor 5 stops, the position sensor 5 turns off.
At the same time, a lock current flows through the power window motor 5, the ripple voltage becomes 0V, the input voltage of the AC amplification circuit 22 also becomes 0V, and the output of the up-down holding circuit 25 becomes
When turned off, the excitation of the up relay 11 is released, the up relay contact is turned off, and the drive of the power window motor 3 is stopped. On the other hand, if a foreign object such as a hand or neck is caught in the rising window glass by the automatic control before the window glass reaches the top dead center and the position sensor 5 is turned off, the rotation of the power window motor 3 is stopped, The motor lock current flows, and the ripple voltage generated in the detection resistor 23 becomes 0V.

This motor lock current is taken out as a signal and inputted to the AND gate 6 as a motor lock signal via the operational amplifier 29 and the one-shot multivibrator 30. While the window glass is being raised by the automatic control, the AND gate 6 has an up signal indicating that the up relay 11 is being excited, an automatic operation detection signal indicating that the automatic control is being performed, and the position sensor 5 is not turned off. The position signals indicating that are input as high level signals, respectively, and by inputting the motor lock signal, all the inputs have become high levels.
A pulse signal of sec is emitted. The pulse signal makes the collector and the emitter of the transistor 33 conductive, the down relay 12 connected to the collector is excited, and the up relay 11 is de-energized, so that the power window motor 3 moves downward. Started reversing to
The window glass, which had been rising until then, turns around and begins to descend. Therefore, while the window glass is rising by automatic control,
When a foreign object such as a hand or a neck is caught, no special operation is required and the window glass immediately descends. In addition, when the automatic control is not performed, since the AND gate 6 does not input the automatic signal, the AND gate 6 does not output the high level signal, and the power window motor 3 is locked. There is no turning point. Further, the position sensor 5 is provided at a position immediately before the window glass reaches the top dead center,
It is designed to detect a clearance of only a few millimeters or less.It can detect with high accuracy whether or not the window glass reaches the top dead center, and it turns off when the window glass reaches the top dead center. When the vehicle reaches the top dead center and the power window motor 3 is locked, the power window motor 3 is not reversed.

[Effect of device]

The power window device for an automobile of the present invention has the above-mentioned constitutional effects and therefore has the following effects.

That is, when the open / close position of the glass reaches the top dead center,
Since the position sensor is turned off to stop the power supply to the down circuit and completely kill the function of the down circuit, when the window glass reaches the top dead center and the power window locks, the power window motor Is not reversed, and especially when the window glass reaches the top dead center and the window glass is in the fully closed state, there is no risk of the down circuit malfunctioning due to the influence of electromagnetic noise, etc., and There is no unnecessary current consumption by the down circuit.

In this way, the position sensor prevents reverse rotation of the power window motor when the window glass reaches the top dead center, prevents malfunction of the down circuit, and eliminates wasteful current consumption of the down circuit. It is extremely practical because it can play multiple roles.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an embodiment of an automobile power window device according to the present invention, FIG. 2 is a side view of a door portion showing an example of a mounting position of an auto switch, and FIG. 3 is an enlarged view of an armrest portion. FIG. 4 is a perspective view of the door portion showing an example of mounting the position sensor. 1 ... Power window switch, 2 ... Auto switch, 3 ... Power window motor, 4 ... Control circuit section, 5 ... Position sensor, 6 ... AND gate, 7 ... Down circuit, 8 ... Select contact, 9 …… Select contact, 10 …… Common contact, 11 …… Up relay, 12 …… Down relay, 13 …… Battery, 14 …… Up relay contact, 15
...... Down relay contact, 16 …… AND gate, 17 …… Ignition switch, 18 …… NOT gate, 20 …… Door, 2
1 …… Door armrest, 22 …… AC amplification circuit, 23 ……
Detecting resistance, 24 …… Waveform shaping circuit, 25 …… Up-down holding circuit, 26 …… Up-down detection circuit, 28 …… Window glass lifting mechanism, 29 …… Operational amplifier, 30 …… One-shot multivibrator, 31 …… Inverter, 32 ... Operational amplifier, 33 ... Transistor

Claims (1)

[Scope of utility model registration request] 1. A power window switch for selecting whether to raise or lower a window glass, an auto switch 2 for performing an automatic control, a power window motor 3 for raising or lowering the window glass, and the power window. Motor 3
In a power window device for an automobile, which comprises a control circuit unit 4 for controlling the driving of the vehicle, the window glass lifting mechanism of the door 20 is provided, one end of which is connected to the battery 13 via an ignition switch 17, and the other end is a down circuit. It is the position sensor 5 connected to the power supply path of 7, and turns off when the window glass reaches the top dead center.
However, the position sensor 5 which keeps the ON state in other cases
When the logical product of the ON signal from the position sensor 5, the motor lock signal from the power window motor 3, the up signal from the control circuit unit 4 and the automatic operation detection signal is satisfied, the power window A power window device for an automobile, comprising: a down circuit 7 having an AND gate 6 for deriving a reverse rotation signal of the motor 3.