JPH08277680A - Power window device - Google Patents

Abstract

PURPOSE: To detect the accurate opening displacement of a window by bringing an electrode rotated against a wire drum wound with a wire lifting or lowering a window glass into slide contact with circuit patterns. CONSTITUTION: A wire drum 16 wound with a wire 9 lifting or lowering a window glass on the outer periphery is rotated by a power window motor 12 provided integrally with a lift mechanism section 10. An electrode 20 is rotated in slide contact with circular circuit patterns 21, 22 set to the prescribed length in response to the displacement quantity from the full open to the full closure of the window glass against the wire drum 16. The accurate opening position information of the window glass is outputted from a detecting circuit section 14. A gear box 13 is provided on the wire drum 16 to reduce the rotation of the wire drum 16 and transmit it to the electrode 20. The contact time between the electrode 20 and the circuit patterns 21, 22 can be prolonged, and the sure connection state can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window device used for opening and closing a window glass of an automobile or the like, and more specifically to detecting an opening position of the window glass,
Also, the present invention relates to a power window device including a position sensor for performing failure diagnosis of the lifting mechanism.

[0002]

2. Description of the Related Art Generally, a well-known opening detecting mechanism 1 for detecting an open / closed position of a window glass of an automobile or the like has a gear 3 in a power window motor 2 which is a drive source for opening / closing the window glass as shown in FIG. It is something that you can guess by using it. That is, the rotation of the power window motor 2 is pulse-counted by the detection means 4 such as a hall element or a rotation sensor, and the winding state of the lifting wire on the wire drum 5 is detected by this count value to detect the opening position of the windshield. Is to guess.

As a device for pulse counting the open / closed state of the window glass, for example, one disclosed in Japanese Utility Model Laid-Open No. 63-11580 is well known. This device discloses a control method for controlling the opening / closing of a window glass by directly comparing a pulse signal from a power window motor and a digital signal from a digital switch provided in the window mechanism for the lifting / lowering operation of the window glass. .

[0004]

However, with the above-described conventional control method, it is impossible to detect the absolute opening position of the window glass, and if the pulse counting fails for some reason, the opening position will be reduced. You may lose your position. The correction when the opening position is lost requires the window to be fully opened or closed to correct the count value at the pulse counting reference position, which is problematic in terms of device reliability. Further, this pulse counting method requires a circuit for recognizing the forward rotation and the reverse rotation of the motor, which leads to an increase in the size and cost of the device and a complicated process. Therefore, the object of the present invention is to
An object of the present invention is to provide a power window device that can electrically and accurately detect the up and down movement of a window, can detect the accurate opening degree of the window, and can perform failure diagnosis of the up and down mechanism.

[0005]

SUMMARY OF THE INVENTION The above object of the present invention is to provide a wire drum which is wound around an outer peripheral surface thereof with a wire for raising and lowering a window glass and which is rotated, and an electrode which is rotated corresponding to the wire drum. A detection circuit unit that is in sliding contact with a circular circuit pattern set to a predetermined length according to the amount of displacement of the glass from fully opened to fully closed, and outputs the opening position information of the window glass, and a wire drum. And a lifting mechanism part integrally provided with a power window motor for rotating the power window device.

Further, the wire drum is provided with a gear box, and the gear box reduces the rotation of the wire drum and transmits it to the electrodes.

Further, the circuit pattern is formed concentrically within the same angle region on the circuit board, and one end of the circuit pattern is connected to the power window control circuit.
This is achieved by providing an overcurrent detection circuit for detecting an overcurrent of the power window motor in the power window control circuit.

[0008]

[Operation] In the power window device having the above-mentioned structure according to the present invention, the electrode which rotates in correspondence with the wire drum is set to a predetermined length according to the displacement amount of the window glass from fully open to fully closed. A detection circuit unit is provided which is in sliding contact with the shaped circuit pattern and outputs the opening position information of the window glass. Therefore, this electrode directly rotates in response to the rotation of the power window motor for moving the window glass up and down, and comes into sliding contact with the circuit pattern, so that the displacement amount of the opening position of the window glass can be accurately detected. .

Further, the wire drum is provided with a gear box, and the gear box decelerates the rotation of the wire drum and transmits it to the electrode. The rotation speed of the power window motor is decelerated and transmitted to the electrode. Therefore, the electrode rotates slowly, the contact time with the circuit pattern can be extended, and a reliable connection state can be obtained with a simple structure.

Further, the circuit pattern is formed concentrically within the same angle area on the circuit board, and one end of the circuit pattern is connected to the power window control circuit having the overcurrent detection circuit. Therefore, it is possible to perform a failure diagnosis and correct the opening position of the window glass when it is fully opened or closed, and it is possible to accurately detect an abnormal state of the lifting mechanism.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the power window device according to the present invention will be described below with reference to FIGS. FIG. 1 is an excerpted view of an essential part of the power window device 6, which shows an elevating member 7 for elevating the window glass 15.
And a wire 9 for driving the elevating member 7 in the vertical direction along the elevating rail 8, and an elevating mechanism section 10 which is wound a predetermined number of times at an intermediate position of the wire 9 and includes a power window motor. There is.

As shown in FIG. 2, the elevating mechanism 10 includes a power window motor 12 having a gear 11 on the outside, a gear box 13 for reducing the rotation from the power window motor 12, and a rotation of the power window motor 12. And a detection circuit section 14 for detecting the opening position of the window glass 15 corresponding to.

This gear box 13 transmits the rotation of the power window motor 12 to the detection rotating portion 14 and meshes gears having different gear ratios with the wire drum 16 which is rotatable by winding the wire 9 a predetermined number of times. It is composed of a plurality of gears for decelerating.

The gear box 13 having such a structure
Has a reduction gear structure in which when the wire drum 16 makes about four rotations, the electrodes provided on the detection rotation unit 14 make one quarter rotation. That is, the fact that the rotation of winding the wire 9 on the wire drum 16 is about four rotations is the number of rotations at which the window glass 15 can be fully opened or fully closed, and the electrode rotates by a quarter corresponding to this number of rotations. It has a structure.

As shown in FIGS. 2 and 3, the detection circuit section 14
Is a disk-shaped circuit board 18 and is located at the center of the circuit board 18 and
A central axis 19 coaxial with the rotation axis of the electrode, an electrode 20 connected to the central axis 19, a concentric first circuit pattern 21 and a second circuit pattern 2 having different diameters on the surface of the circuit board 18.
2 and.

The detection circuit section 14 having such a configuration
Is freely rotatable in response to the rotation of the power window motor 12 while contacting the contacts of the electrode 20 connected to the central shaft 19 from above the first and second circuit patterns 21 and 22 provided on the circuit board 18. It is possible to obtain the opening position information of the displacement amount that is normally or reversely rotated from the electric contact that moves to the right.

As shown in FIG. 3, the first and second circuit patterns 21 and 22 are formed of strip-shaped resistors on the circumferences having different diameters, and the length of the strip-shaped resistors is formed. Is 1
It is formed to have a length (between X and Y) of approximately one quarter of the circumference.

One end of the band-shaped first circuit pattern 21 is connected to the power supply voltage V through a conductor, and
One end of the circuit pattern 22 is connected to the terminal Vout
It is connected to the.

Detection circuit section 1 having such a circuit configuration
4, the electrode 20 has the first and second circuit patterns 2
When the electric power source voltage V moves while sliding on the first and second electrodes 22, the first and second circuit patterns 21, 22 pass through the electrode 20.
The voltage dropped due to the changing resistance value of
It is output to ut. Further, if the window glass 15 is fully opened or closed smoothly, the electrodes 20 slidingly contacting the first and second circuit patterns 21 and 22 are also smoothly operated. As shown in FIG. 4, the output voltage from the terminal Vout can be obtained as linearly increased opening position information.

Further, the first and second circuit patterns 21,
The strip-shaped length of 22 is set to be longer than the maximum position (fully open and fully closed position) in which the motor 12 rotates normally or reversely when the window glass 15 is fully opened or fully closed. Therefore, as shown in FIG. 4, the absolute position information corresponding to the displacement amount can be obtained by the output voltage value from the terminal Vout regardless of whether the motor 12 is rotating normally or reversely.

Further, if the vicinity of the maximum position where the window is fully opened or fully closed is set as a correction range, the position value of the terminal Vout can be corrected by the vertical movement of the window glass 15, for example, the position correction of fully opened or fully closed due to the elongation of the wire. And the voltage values of the reference values V0 and V1 are compared with each other, the position correction according to the extended wire can be performed to appropriately control the raising / lowering operation of the window glass 15. For example, when the output voltage of the terminal Vout becomes zero volts when the window glass 15 is fully opened or fully closed, it means that the electrode 20 has come off the first and second circuit patterns 21 and 22, and the wire It can be determined that a failure such as disconnection has occurred.

On the other hand, the detection circuit portion 14 has a structure in which the electrode 20 can rotate freely in any rotation or in either direction. Therefore, the wire 9 is broken and the wire drum 16
Even if it becomes a situation in which the electrode runs idle, the electrode 20 only rotates while contacting on the first and second circuit patterns 21, 22 and is not destroyed.

As described above, the detection circuit section 14 has a contact structure that can be decelerated and the contact time can be long, and has a simple structure that is strong against vibration and impact. Therefore, in addition to the accurate position detection and opening position adjustment functions associated with the opening / closing operation of the window glass 15, it is possible to surely perform fault diagnosis such as detection of an abnormal situation such as wire breakage and motor overcurrent detection. .

That is, it will be described with reference to FIGS. 5 and 6 that the provision of the detection circuit section 14 makes it extremely easy to detect various types of failures and diagnose failures.

As shown in FIG. 5, in the power window control circuit 24, the detection circuit section 14 causes the power window motor 1 to operate.
By making it possible to directly and accurately detect the rotation state of the second motor, for example, signals necessary for various failure diagnoses, such as the voltage value of the output terminal Vout from the detection circuit unit 14 and the reference values V0 and V1 can be detected. The voltage value, the rotation output signal of the power window motor by the operation of the power window switch (SW), etc. are input. As a result, the abnormal opening / closing state of the window glass 15 is detected, and the power window motor 1
2 overcurrent detection and the like can be performed.

The power window control circuit 24 is an arithmetic control unit (hereinafter referred to as C
PU) 25, comparators 26 and 27 that are input to the CPU 25, and an overcurrent detection circuit 28 that detects an overcurrent of the motor connected to the lifting mechanism unit 10.

The comparator 26 includes a detection circuit section 14
The voltage value of the terminal Vout and the preset reference voltage values V0 and V1 are compared to correct the opening position, the function of detecting and correcting the wire extension, and the window opening such as wire breakage. Detect an abnormality. That is, the comparator 27
Mainly has a function of detecting a motor failure, a lifting mechanism failure, and a pinching abnormality.

The circuit configuration is not limited to those described above, and may be any circuit configuration capable of performing position correction, failure diagnosis, etc. mainly by the power window motor 12 and the voltage value of the terminal Vout of the detection circuit section 14.

The operation of the power window control circuit 24 having such a configuration will be described with reference to the flow chart shown in FIG. 6 when the operation is started when the window glass is in the fully opened state.

In FIG. 6, first, one of the switches of the power window device of the lifting mechanism is set to 1 (ST1), and if the switch is in the closed state (ST2), the fully open state of the window glass 15 at the start of the operation is detected. (ST3). Here, the operation of the switch in the open state and the window glass 1
When 5 is not in the fully open position, the process is performed in another mode not shown.

If the window glass 15 is at the fully open position, the power window motor 12 is rotated in the direction to close the window (ST4). In this state, the operation switch of the power window is operated, and if the operation is in the opening direction, it is processed by another flow via the switches ST1 and ST2 (ST5).

When the power window motor 12 is being driven in the closing direction and the operation in the closing direction in the same direction is being continued, the driving state of the power window motor 12 is constantly observed (ST6).

Then, when the motor 12 is stopped, that is, when the motor is not locked, the output state of the opening degree of the window glass 15 is always detected (ST7). Therefore, even when the motor 12 is being driven, the output terminal (Vou) of the detection circuit unit 14 indicating the opening degree of the window glass 15 is displayed.
If the voltage value of t) does not change, the window glass 1
5 means that the motor is not moved to the open state, and it is first judged that the motor has failed (ST8).

That is, regardless of the control circuit 24 instructing the driving of the power window motor 12, the output terminal (Vout) of the detection circuit section 14 indicating the opening degree of the window glass 15 without causing the motor lock. If the voltage value does not change, it is determined that the motor is out of order, and the flag FLG2 is set.

If the motor 12 is driven, the output terminal (Vou) of the detection circuit section 14 indicating the opening degree of the window glass 15 is displayed.
If the voltage value of t) changes, the windshield 15
The degree of the output terminal (Vout) indicating the opening degree is detected by the voltage value (ST7, ST9).

At this time, if the motor 12 is driven and the output terminal (Vout) indicating the opening of the window glass 15 is zero volt (Vout = 0), that is, there is no load, it is judged that the wire is broken (ST10). ).

That is, normally, when the window glass 15 is in the fully closed or fully opened state, the power window motor 12 is locked and stopped, but the motor 12 is not locked even though the window glass 15 is being opened and closed. In this case, the detection circuit unit 14 detects the number of rotations of the wire drum 16. Then, the detection circuit unit 1 indicating the opening degree
If the output terminal (Vout) of No. 4 is zero volt, that is, if there is no load, it is judged that the wire 9 is broken and the flag F is detected.
Set LG1.

If the voltage value of the output terminal (Vout) of the detection circuit section 14 indicating the opening degree of the window glass 15 is not zero volt, it is determined that the closing operation is normal and the motor drive is continued (ST9). → ST4).

When the power window motor 12 is normally driven and the window glass 15 is operating in the closing direction, when the locked state occurs with respect to the motor 12, the motor 12 immediately stops (ST11).

Then, if the open / closed state of the window glass 15 is not fully opened while the motor 12 is stopped, it is determined that the lifting mechanism has a failure and the flag FLG3 is set (ST1).
3).

If the stopped position of the window glass 15 is the fully open position, the stopped opening is checked by the voltage value of the output terminal (Vout), and if it is not within the movable range, it is determined that an entrapment abnormality has occurred. Then, the flag FLG4 is set (ST15). If it is within the movable range, then it is checked whether or not the stop position of the window glass 15 is within the fully closed position range (ST16).

If it is out of the fully closed position range, it is determined that an abnormality such as a failure of the lifting mechanism or an entrapment has been detected just before the closed state (ST17).

If the window glass 15 is in the fully closed position range, the preset reference value (V0, V1) is compared with the voltage value of the output terminal (Vout) that is stopped, and a predetermined value or more is compared. If so, it is judged that the wire 9 is elongated and the flag FLG0 is set (ST19).

If it is within the reference value (V0, V1), it is compared with the next reference value, and if it is more than a predetermined value, the fully closed position is recorded and becomes the reference value for the next comparison (ST2).
1).

If the value is equal to or smaller than the reference value, it is considered that the closing operation is completed, and the next operation is awaited (ST1).

In this way, when the window glass 15 stops, for example, the detection circuit unit 1 is opened in the fully closed position.
When the voltage value of the output terminal (Vout) of 4 does not occur, it is determined that the lifting mechanism is abnormal, and it is determined that it is a pinch at a position other than the fully closed and fully open positions, and has a function of setting a predetermined flag. Is. Therefore, by reading this flag from the outside, the cause of failure can be grasped without disassembling the door part.

[0047]

As described above, in the power window device of the present invention, the electrode that rotates in response to the wire drum is set to a predetermined length according to the displacement amount of the window glass from fully open to fully closed. A detection circuit unit is provided which is in sliding contact with the circular circuit pattern and outputs the opening position information of the window glass. Therefore, this electrode rotates in direct correspondence with the rotation of the power window motor for raising and lowering the window glass, and comes into sliding contact with the circuit pattern, so that the displacement amount in the opening range of the window glass can be accurately detected. . Therefore, it is possible to reliably detect the absolute position of the opening / closing opening of the window glass, and by incorporating it in the lifting mechanism, it is possible to provide a reliable opening adjustment mechanism with an inexpensive and compact configuration. .

The wire drum is provided with a gear box, and the gear box decelerates the rotation of the wire drum and transmits it to the electrodes. The rotation speed of the power window motor is decelerated and transmitted to the electrodes. Therefore, the electrode rotates slowly, the contact time with the circuit pattern can be taken longer, and by comparing the number of rotations of the motor and the rotation state of the detection circuit unit, it is possible to withstand vibration, shock, etc. The connected state can be obtained, and the abnormal state of the lifting mechanism can be accurately and easily detected with a simple structure.

Further, the circuit pattern is formed concentrically within the same angle region on the circuit board, and one end of the circuit pattern is connected to the power window control circuit having the overcurrent detection circuit. Therefore, it is possible to perform a failure diagnosis and correct the opening position of the window glass in the fully open and fully closed positions, to always detect the accurate opening position of the window, and to accurately detect the abnormal state of the lifting mechanism. It is possible to realize a reliable window lifting control.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a power window device according to the present invention.

FIG. 2 is an enlarged perspective view of a lifting mechanism section in FIG.

FIG. 3 is an explanatory diagram of a detection circuit unit in FIG.

FIG. 4 is a graph showing correction of an opening position in FIG.

FIG. 5 is a block diagram showing a power window control circuit.

FIG. 6 is a flowchart when an operation is started from the fully opened state of the window.

FIG. 7 is an explanatory view showing a conventional power window device.

[Explanation of symbols]

 6 Power Window Device 7 Elevating Member 8 Elevating Rail 9 Wire 10 Elevating Mechanism Section 11 Gear 12 Power Window Motor 13 Gear Box 14 Detection Circuit Section 15 Wind Glass 16 Wire Drum 18 Circuit Board 19 Center Axis 20 Electrode 21 First Circuit Pattern 22 Second circuit pattern 24 Control circuit 25 CPU 26, 27 Comparator 28 Overcurrent detection circuit

Claims (4)

[Claims] 1. A wire drum which is rotated by winding a wire for raising and lowering a window glass on an outer peripheral surface thereof, and an electrode which is rotated corresponding to the wire drum have a displacement amount from a fully opened state to a fully closed state of the window glass. A detection circuit unit that slides on a circular circuit pattern set to a predetermined length in accordance with the output position information of the window glass and a power window motor that rotates the wire drum are integrally formed. A power window device comprising: an elevating mechanism portion provided. 2. The power window device according to claim 1, wherein the wire drum includes a gear box, and the gear box decelerates the rotation of the wire drum and transmits the decelerated rotation to the electrodes. 3. The circuit pattern is concentrically formed in the same angle region on a circuit board, and one end of the circuit pattern is connected to a power window control circuit. The power window device described in. 4. The power window device according to claim 3, wherein the power window control circuit includes an overcurrent detection circuit that detects an overcurrent of the power window motor.