JP3381299B2 - Window glass equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to a window glass for opening and closing a window of a vehicle or the like, more particularly, about the equipment for electrically detecting the open position of the window glass <br / > Ru.

[0002]

2. Description of the Related Art In a conventional vehicle equipped with a power window, the number of rotations of a power window motor is detected from the fully closed state or the fully opened state of the window glass to estimate the vertical movement amount of the window glass. Although it is configured to detect the open / closed position of the glass, in this case, in addition to the sensor that detects the rotation speed of the power window motor, another sensor that detects the fully closed or fully opened state of the window glass is used. In addition, it is practically difficult to accurately detect the absolute opening / closing position of the window glass from the fully closed or fully opened state of the window glass and the number of revolutions of the power window motor. There was a limit to what I could do.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device capable of reliably detecting the absolute opening / closing position of a window glass in a vehicle or the like.

[0004]

In order to solve this problem, a window glass device according to the present invention is provided with a conductive thin film formed on the surface of the window glass and attached along both edges of the window glass. The apparatus is provided with a conductive rubber that contacts the conductive thin film and a device that detects an electric resistance value of the conductive thin film that varies according to the displacement of the window glass.

The window glass device according to the present invention includes a conductive thin film formed on the surface of the window glass, a conductive rubber attached along both edges of the window glass and in contact with the conductive thin film, The apparatus is provided with a power source for applying an AC voltage between the conductive rubbers and a device for detecting the electric resistance value of the conductive thin film which varies according to the displacement of the window glass.

[0006]

Therefore, when the window glass is displaced and the window is opened / closed, the contact length between the conductive thin film formed on the surface of the window glass and the conductive rubber attached along both edges of the window glass, respectively. Change, and the electric resistance value in the conductive thin film changes according to the opening of the window.Therefore, the detection device should detect this electric resistance value to detect the absolute opening / closing position of the window glass. Moreover, since the conductive rubber abuts the conductive thin film, the electrical connection between them can be easily and surely made and the detection performance of the detection device can be improved.

Further, when an AC voltage is applied between the conductive rubber and the conductive thin film, rattling occurs when the window glass is displaced, and the conductive thin film and the conductive rubber are slightly contacted with each other. Even if it is incomplete, that portion instantaneously forms a kind of capacitor, so that the electrical resistance value can be easily detected by the detection device from the impedance of the conductive thin film.

[0008]

Embodiments of the present invention shown in the drawings will be specifically described below. In a vehicle door 1 equipped with a power window, a transparent window glass 5 is fitted into a window 4 defined by a sash 2 and a door body 3, and the window glass 5 is provided in the run channel in the sash 2 and in the front and rear of the door body 3. Vertically arranged run channels 6 and 6 respectively
The window 4 can be opened and closed by being guided up and down by an elevating device (not shown) equipped with a power window motor. The window glass 5 has a transparent or semi-transparent conductive thin film 7 of ITO, which is a solid solution of indium oxide and tin dioxide, on both inner and outer surfaces and / or at least one of both.
Are formed on one surface by a metal vapor deposition method or the like, and the run channels 6 are each made of conductive rubber,
The front and rear edges of the window glass 5 are elastically sandwiched between the front and rear surfaces thereof to be electrically connected to the conductive thin film 7.

On the other hand, the electric circuit 8 connecting the two run channels 6 and 6 has a low frequency AC power source 9, an ammeter 10 and switches 11 and 11, and both switches 11 and 11 are arranged on both sides of the AC power source 9. When the power window switch (not shown) is OFF, it is interlocked with it to be grounded as shown, and when the power window switch is ON, it is interlocked with it to close the electric circuit 8, respectively.

Therefore, the power window switch is turned on.
When the power window motor is actuated by this to raise and lower the window glass 5, both switches 11 and 11 close the electric circuit 8, while the window glass 5 is moved in accordance with the raising and lowering position of the window glass 5.
The contact length between the conductive thin film 7 and the conductive rubber run channel 6 on the front and rear edges changes, and the conduction cross-sectional area of the electric circuit formed by the conductive thin film 7 between the two run channels 6, 6 changes. Therefore, the impedance fluctuates.

At this time, if Vo is the maximum value of the applied voltage in the electric circuit 8, Io is the maximum value of the energizing current measured by the ammeter 10, and θ is the phase difference between the voltage and the current, the impedance of As is well known, the DC resistance component that is the real part is Vo / Io · cos θ, and, for example,
The voltage and current waveforms are respectively passed through comparators to form a positive square waveform, and the rise delay time t is measured. From the cycle time T calculated from the AC frequency, θ
Can be easily obtained as t / T · 2π, and therefore the DC resistance component of the above impedance can be detected very easily. Therefore, the absolute open / close position of the window glass 5 can always be accurately detected by its size. Therefore, if the opening degree of the window 4 or the opening / closing position of the window glass 5 at that time is displayed on an instrument panel (not shown) of the vehicle in an analog or digital liquid crystal manner, the vehicle can be driven even while the vehicle is running. A person can adjust the opening degree of the window 4 relatively safely.

Since the run channel 6 is made of conductive rubber and elastically sandwiches both front and rear surfaces of the window glass 5, the conductive thin film 7 of the window glass 5 is formed.
The electrical connection between the run channel 6 and the run channel 6 is relatively good, and moreover, the window glass 5 has some rattling while moving up and down, and the contact between the conductive thin film 7 and the conductive run channel 6 is temporary. Even if it becomes incomplete, that portion will momentarily form a kind of capacitor by the application of the AC voltage from the power source 9, and there is no particular problem in measuring the DC resistance component from the above impedance. The absolute opening / closing position of the window glass 5 can be reliably detected.

Next, when the power window motor is not operating, both switches 11 and 11 are grounded as shown in the figure, so that electromagnetic waves incident on the surface of the window glass 5 in the window 4 from outside are conductive. Since the electromagnetic thin film 7 is reliably captured, and thus the above-mentioned electromagnetic waves can be reliably shielded against various electronic devices mounted inside the vehicle, it is possible to suppress the occurrence of vehicle malfunctions.

In the above embodiment, the run channel itself in the door body is made of conductive rubber.
A conductive rubber can be attached inside the normal run channel, and this conductive rubber can be configured to contact the conductive thin film on the surface of the window glass to energize it, and it is necessary even when the power window motor is not operating. Needless to say, if the electric circuit can be closed according to the above, the absolute opening / closing position of the window glass can be detected even when the window glass is stopped. Furthermore, even if a voltage is applied between the run channel in the door body on one of the front and rear edges of the window glass and the lower edge of the window glass, the electrical conductivity of the conductive thin film on the surface of the window glass is changed in response to the displacement of the window glass. Since the resistance value varies, the absolute opening / closing position of the window glass can be detected by detecting the variation in the electric resistance value as described above.

Further, a conductive metal frame is attached to the edge of the window glass so as to maintain conductivity with the conductive thin film on the surface of the window glass, and the metal frame is attached along the edge of the window glass. By sliding with the conductive rubber, it is possible to prevent the conductive thin film from sliding and wearing due to the displacement of the window glass, and the durability thereof can be easily improved. Furthermore, it is possible to load a conductive thin film on the surface of the window glass with a DC voltage and detect the absolute opening / closing position of the window glass by the fluctuation of its electric resistance value. It goes without saying that the present invention can be applied to the open / close windows other than the vehicle in the same manner as described above.

[0016]

In the window glass position sensor according to the present invention, when the window glass is displaced and the window is opened and closed, the conductive thin film formed on the surface of the window glass and the both edges of the window glass, respectively. The contact length with the attached conductive rubber changes and the electric resistance value in the conductive thin film changes according to the opening of the window. closing position can always be detected accurately, therefore, be a driving secondary vehicle you can operate safely and reliably the window glass to the open and closed positions of the desired.

[Brief description of drawings]

FIG. 1 is a schematic side view of a main part in an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG.

[Explanation of symbols]

1 Vehicle door 4 windows 5 window glass 6 Conductive rubber run channel 7 Conductive thin film 8 electric circuits 9 Low frequency AC power supply 10 ammeter 11 switch

Claims (2)

(57) [Claims] 1. A conductive thin film formed on the surface of a window glass, a conductive rubber attached along both edges of the window glass and abutting the conductive thin film, and the conductive thin film fluctuates according to the displacement of the window glass. A window glass device equipped with a device for detecting an electric resistance value of the conductive thin film. 2. A conductive thin film formed on the surface of the window glass, a conductive rubber attached along both edges of the window glass and in contact with the conductive thin film, and an AC voltage is applied between the conductive rubbers. And a device for detecting an electric resistance value in the conductive thin film that varies according to the displacement of the window glass.