JP2000282749A - Power window device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power window device capable of opening a power window definitely at a desired point in time when a motor vehicle sinks in water. SOLUTION: This power window device prohibits driving and controlling a motor 1 for moving up and down a window by a window controller 4 when a sinking motor vehicle is detected by its detector 5 and fixes the electric potential of a pair of output ends 20, 30 of the window controller 4 to a ground voltage. In this way, definite ascending and descending movement, of the motor 1 for the window can be secured by switching over a pair of switches 6, 7 from one to the other, located at hand for window raising operation interposed between the both output ends 20, 30 and both the ends of the window ascending and descending motor 1.

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 applied to a power window, a slide roof and the like of a vehicle.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 9-2623 discloses a submergence sensor for preventing a power window from being opened due to flooding of a control unit of a power window device when a vehicle is submerged and an occupant being trapped inside. Proposes to open the power window automatically by detecting submersion of the vehicle.

[0003]

However, in the above-described conventional power window device with a water immersion sensor, the power window opens at the same time that the vehicle is immersed in the water, so that water flows into the inside from the opened window at an early stage. Therefore, it was found that there was a problem that the vehicle would be quickly submerged before the passenger was ready to escape.

However, if the power window is closed when submerged in water, there is a possibility that the operation of the power window device may become unreliable or impossible to open due to flooding of a control unit or the like of the power window device. Of course, this problem can be prevented by designing the entire control unit of the power window device to be waterproof. However, the present invention has been made in view of the above problem, and the power window is reliably opened at a desired time when the vehicle is submerged. It is an object of the present invention to provide a power window device capable of performing such operations.

[0005]

According to the first aspect of the present invention, when the submersion detecting unit detects submersion in water, the window control unit is prohibited from driving and controlling the window elevating motor. The potential of the pair of output terminals of the unit is fixed to the ground potential. The window control unit is a control unit for controlling the window raising / lowering motor by the remote-side window raising / lowering operation switch.

Accordingly, it is possible to prevent the state of the window control unit from becoming unstable due to flooding in the window control unit or the like, and to prevent the window raising / lowering motor from being in an abnormal operation, particularly in a state in which the window raising / lowering operation cannot be performed. Furthermore, according to the present configuration, when the submersion detection unit detects submersion, both of the pair of output terminals of the window control unit are fixed to the ground potential. By switching a pair of window raising operation switches on the near side interposed between the windows, it is possible to ensure a reliable raising and lowering of the window raising and lowering motor.

Therefore, according to the power window device of the present invention, when the vehicle is submerged, even if the submersion sensor detects submersion, the power window does not automatically open. The problem of the vehicle being submerged early before the occupant is ready to escape because it flows in early can be resolved, and by closing the window at the time of submersion, the submersion delays the submersion and as soon as the preparation for escape is ready, the window control unit Regardless of the internal state due to flooding, the power window (window) can be reliably opened to allow the occupant to escape.

According to a second aspect of the present invention, in the power window device according to the first aspect, further, when water immersion is detected,
The power supply from the higher power supply to the pair of switching relays for switching the potentials of the pair of output terminals between the higher power supply side and the ground side is cut off. With this configuration, both of the pair of output ends of the window control unit are reliably grounded when submerged, so that the window elevating motor may be operated erroneously due to flooding of the window control unit or the operation switch on the hand side. Can be prevented from operating even during the operation of.

It is preferable that the submergence detecting unit excluding the submergence sensor and a power supply switch that cuts off power supply to both of the switching relays by detecting submersion by the submergence detecting unit are waterproofed. Even in this case, these waterproofing processes can be performed by a simple process such as resin molding on these circuit elements on the circuit board, for example, and are much easier than waterproofing the entire window control unit.

According to the third aspect of the present invention, the submersion detection unit used in the power window device includes a submergence sensor, a switching element that amplifies a signal from the submergence sensor in a binary manner,
And a bias resistor for holding the input terminal potential of the switching element when it is not submerged and stably maintaining the switching element in an on or off state. Further, in this configuration, the submergence sensor is provided at least on the power supply side electrode fed from at least the high power supply line, the ground side electrode grounded on the ground line, and the power supply side electrode and the ground side electrode at predetermined intervals. Output electrode to be used. The resistance value of the bias resistor is smaller than the non-submerged output impedance of the submerged sensor and has an impedance larger than the submerged output impedance. With this configuration, the following operation and effect can be obtained.

First, the present inventors made a two-terminal submersion sensor having two electrodes, an output electrode and a power supply side electrode, grounded the output electrode through a load resistor, and switched the potential change of the output electrode. An experiment was conducted with a circuit configuration (hereinafter, referred to as a two-terminal submergence detection system) for inputting the signal to the signal input terminal of the element and performing binary amplification. However, in this two-terminal type submersion detection method, the output potential of the submersion sensor is the ratio of the impedance between the electrodes of the submersion sensor and the impedance of the load resistance. It changes variously due to variations, an increase in impedance due to oxidization occurring on the electrode surface over time, a fouling of the insulator surface between the electrodes, and a decrease in creeping insulation resistance when the electrodes are not wet due to migration of the electrodes. Further, the impedance of the load resistor also has manufacturing variations.
For this reason, it was found that the submergence detection threshold value of the submergence detection unit fluctuates with time or from the beginning of assembly.

On the other hand, when the three-terminal type submersion sensor of this configuration is used, even if the impedance between the electrodes of the submergence sensor fluctuates variously due to the above-described causes, the fluctuation of the impedance between the output electrode and the power supply side electrode. And the variation in impedance between the output electrode and the ground side electrode has the same tendency, so if the bias resistance is ignored, the output potential of the submerged sensor when submerged is determined according to the ratio of these two impedances. And fluctuations are small. The bias resistor in this configuration is different from the load resistor in the above-described two-terminal type submergence detection method, and merely prevents the signal input terminal potential when the switching element is not submerged from floating due to static electricity or the like. It can be much larger than the resistance, and the fluctuation of the submersion detection sensitivity due to the variation of the resistance value is very small.

Therefore, according to this configuration, it is possible to realize a power window device in which the variation in the submergence detection sensitivity due to manufacturing variations or aging or environmental changes is small. According to the configuration of claim 4, in the power window device of claim 3, each electrode of the water immersion sensor further includes:
Since it is composed of the conductor patterns arranged on the surface of the circuit board at a predetermined interval from each other, it is possible to reduce the manufacturing cost without increasing the number of steps.

According to the fifth aspect of the present invention, in the power window device according to the fourth aspect, since the window control section is mounted on the circuit board, the manufacturing cost can be further reduced. According to a sixth aspect of the present invention, in the power window device according to the fourth aspect, an opening is further provided in the circuit board between the exposed conductor patterns.

In this way, when the water is not immersed, the creeping insulation resistance between the conductor patterns can be increased, and when the water is immersed, the water immersed in the openings short-circuits (electrically connects) the conductor patterns at the shortest distance. Therefore, despite the condensation and migration of the metal constituting the conductor pattern,
A high resistance change rate can be maintained between the flooded state and the non-flooded state.

According to the seventh aspect of the present invention, in the power window device according to the sixth aspect, since the opening is formed wider at a lower portion than at an upper portion thereof, the opening accumulates at an upper portion of the opening due to dew condensation or water immersion. The dropped water drops move under the opening by their own weight. Since the lower portion of the opening is wide, the water droplet holding capacity of the opening due to the surface tension of the water is small, and the water droplet falls from the lower portion of the opening as the water level decreases.

Therefore, it is easy to eliminate the dew condensation water droplets and the immersion water droplets. According to the configuration of the eighth aspect, in the power window device of the fourth aspect, the output electrode and the power supply side electrode or the ground side electrode are formed of an insulator on the circuit board and located between the exposed conductor patterns. An obstacle is provided to increase the creepage distance between.

According to this configuration, the creepage insulation resistance can be increased without increasing the interval between the conductor patterns when water is not immersed, and the size of the water immersion sensor can be reduced. According to a ninth aspect of the present invention, the power window device according to the fourth aspect further includes a high resistance film that covers the conductor pattern, has a predetermined electric resistivity, and protects the conductor pattern.

By doing so, it is possible to prevent a change in impedance between electrodes due to oxidation or migration of the surface of the conductor pattern, and to stabilize submergence sensitivity.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described based on the following examples.

[0021]

Embodiment 1 FIG. 1 shows a circuit diagram of a power window device of this embodiment. (Circuit configuration) 1 is a window motor (rear side) elevating motor composed of a DC motor, 2 is a switching relay for raising the window, 3 is a switching relay for lowering the window, 4 is a window control unit, 5 is a submergence detecting unit, and 6 is a hand-held unit. Side window raising operation switch, 7 is a hand side window lowering operation switch, 8 is a driver side (remote side) window raising and lowering operation switch, 9 is a driver side window controlling controller (microcomputer). It is.

The window controller 4 will be described below. 40 is a microcomputer, 41 is a common emitter npn transistor for controlling the drive coil 23 of the window raising switching relay 2, 42 is a common emitter npn transistor for controlling the driving coil 33 of the window lowering switching relay 3, 43 is the driving coil 23, 33
Pnp transistor (feed switch) for controlling power supply to the power supply, D is a flyback diode connected in anti-parallel to the drive coils 23 and 33, Rb is a base current limiting resistor, and R is a resistor for setting the base current of the transistor 43. It is. Each element is mounted on the printed circuit board 10.

The window raising / lowering switching relay 2 has a common terminal 20 connected to one main terminal of the window raising / lowering motor 1, a normally closed first switching terminal 21 grounded, and a normally open power supply supplied from a high power source. It has a second switching terminal 22 and a drive coil 23. The window lowering switching relay 3 includes a common terminal 30 connected to the other main terminal of the window raising / lowering motor 1, a normally closed first switching terminal 31 that is grounded, and a normally open second power supply that is supplied from a high-level power supply. It has a switching terminal 32 and a drive coil 33.

The transistors 41 and 42 are controlled by a rear window control microcomputer 40. The microcomputer 40 controls the driver's seat side (remote side) window raising and lowering operation via a driver's seat window control controller 9. The current to the drive coils 23 and 33 is interrupted by an operation signal from the switch 8. The transistor (power supply switch) 43 controls power supply to the drive coils 23 and 33 according to the output signal of the submergence detection unit 5.

The submergence detecting section 5 will be described below. The submergence detection unit 5 includes a submergence sensor 50, a P-channel MOS transistor (switching element) 51, and a resistor (bias resistance element in the present invention) 52. The gate electrode of the transistor 51 is supplied with power from the high power supply (+ B) through the resistor 52 and is connected to the output terminal of the submergence sensor 50. The source electrode of the transistor 51 is connected to the high power supply, and the drain electrode is connected to the base electrode of the transistor 43.

A part of the submersion sensor 50 will be described with reference to a partial plan view shown in FIG. The submersion sensor 50 has an output electrode, a power supply side electrode, and a ground side electrode, each of which is composed of conductor patterns 500 to 502 patterned on the surface of the printed board 50. The conductor pattern 500 forms an output electrode, the conductor pattern 501 forms a power supply side electrode, and the conductor pattern 502 forms a ground side electrode. In FIG. 2, the tip of the output electrode 500 is bifurcated to the left and right, the left tip 500a faces the power supply electrode 501 at a predetermined interval, and the right tip 500b has a predetermined interval at the ground electrode 502. They face each other. Reference numeral 503 denotes an opening provided in the printed circuit board 10 between the left end portion 500a of the output electrode 500 and the power supply-side electrode 501;
0 is an opening provided on the printed circuit board 10 and located between the right end portion 500b and the ground electrode 502.

The features of the three-terminal submersion sensor 50 will be described below. At the time of non-submersion, the opening 503 is provided completely across the space between the front end of the power supply side electrode 501 and the front end of the output electrode 500 facing each other. Electrodes 500, 50 when not submerged due to pattern migration, etc.
It is possible to suppress a decrease in impedance between the two.
Similarly, the opening 504 is provided when the electrode 50 is not immersed in water.
A decrease in impedance between 0 and 502 is suppressed.

When submerged, the openings 503 and 504 are filled with water, so that a low-resistance current path is formed between the electrodes 500 and 501 at the shortest distance. Similarly, a low-resistance current path is formed between the electrodes 500 and 502 at the shortest distance. Is formed, and the output impedance of the water immersion sensor 50 becomes extremely low. The potential of the output electrode 500 is mainly determined by the impedance ratio between the two current paths. Openings 503, 5
04 is formed wider at the lower portion than at the upper portion, so that water droplets accumulated on the upper portions of the openings 503 and 504 due to dew condensation, water infiltration, and the like are removed by their own weights.
Move to the bottom of. Since the lower portions of the openings 503 and 504 are wide, the opening 5
03 and 504 have a small water droplet holding capacity, and the water droplets fall from the lower portions of the openings 503 and 504 as the water level decreases. Therefore, the output impedance of the immersion sensor 50 is prevented from being erroneously reduced due to the short circuit between the electrode 500 and the electrode 501 or 502 due to the dew condensation accumulated in the openings 503 and 504.

The window raising operation switch 6 on the hand side has a common terminal 60 connected to one main terminal of the window raising / lowering motor 1, a first switching terminal 61 supplied from a high-level power supply, and a common terminal of the switching relay 2. The switch 20 has a second switch terminal 62 connected to the switch 20. The window lowering operation switch 7 on the hand side includes a common terminal 70 connected to the other main terminal of the window raising / lowering motor 1, a first switching terminal 7 supplied from a higher power supply.
1. A changeover switch having a second changeover terminal 72 connected to the common terminal 30 of the changeover relay 3. (Circuit operation)-During non-submersion During non-submersion, the output terminal of the submersion sensor 50 is insulated from the high power supply and the ground line, so that the transistor 51 is turned off by the resistor 52, and as a result, the transistor 43 is turned on by the resistor R. , The transistor 43 enters a state of supplying power to the drive coils 23 and 33.

Therefore, when the operation switch 8 for raising and lowering the window on the driver's seat side is operated, the operation signal turns on the transistor 41 for raising the window or the transistor 42 for lowering the window as required through the microcomputer, that is, the controllers 9 and 40. be able to. When the transistor 41 is turned on, the drive coil 23 of the window raising switching relay 2 is energized, and the common terminal 20 has a high power supply potential, and the window raising / lowering motor 1 raises the power window. Transistor 42
Is turned on, the drive coil 33 of the window lowering switching relay 3 is turned on.
, The common terminal 30 has a high power supply potential, and the window raising / lowering motor 1 lowers the power window.

It is obvious that the power window can be raised and lowered by the changeover switches 6 and 7 on the hand side. -When submerged When submerged, the output terminal of the submerged sensor 50 is connected to a high power supply and a ground line with a low electric resistance value (much smaller than the resistance value of the resistor 52), and the potential of the output terminal of the submerged sensor 50 is set in this embodiment. In this case, the potential drops to about の of the higher power supply voltage, and this potential is higher than the turn-on threshold voltage Vt of the transistor 51, so that the transistor 51 is turned on.

As a result, the transistor 43 is turned off,
The energization of the drive coils 23 and 33 is cut off, and the common terminals 20 and 30 of the switching relays 2 and 3 are both grounded. With this, even if the operation states of the transistors 41 and 42 become unknown due to the influence of the flooding on the window control unit 4,
The drive coils 23 and 33 are not energized.

Therefore, at this time, when the hand-side changeover switch (hand-side window lowering operation switch) 7 is operated, a current flows in the window raising / lowering motor 1 in the power window lowering direction, and the power window lowers. I do. That is,
At this time, the switching relay 2
The switching of the common terminal 20 to the switching terminal 22 is prohibited by turning off the transistor 43, so that the power window can be reliably lowered.

[0034]

Embodiment 2 FIG. 3 shows a circuit diagram of a power window device according to another embodiment. This power window device differs from the power window device of the first embodiment (see FIG. 2) only in that the structure of the submersion sensor 50 is changed to a submergence sensor 50a.

The water immersion sensor 50a is provided with an electrically insulating resin protective film 50 such as polyimide, for example, on electrodes 500 and 501 made of conductor patterns patterned at predetermined intervals on the printed circuit board 10 respectively.
5 are provided to expose opposite sides of the electrodes 500 and 501. By doing so, it is possible to secure the necessary inter-electrode creeping insulation resistance while reducing the required area required for the water immersion sensor 50 and also to protect the conductor pattern.

[0036]

Embodiment 3 FIG. 4 shows a circuit diagram of a power window device according to another embodiment. This power window device differs from the power window device of the first embodiment (see FIG. 2) only in that the structure of the submersion sensor 50 is changed to a submergence sensor 50b.

The water immersion sensor 50a has a configuration in which electrodes 500 and 501 made of conductor patterns patterned at predetermined intervals from each other are provided on a printed circuit board 10, for example, with a protective film 506 having a high specific resistance. The protective film 506 has, for example, a thickness t of several μm or less, and a distance L between the electrodes 500 and 501 of several mm or more.

The electrodes 500 and 50 when not immersed in water
The current between the electrodes 500 and 501 is mainly the protection film 506 between the electrodes 500 and 501.
Through these electrodes 500, 50 when submerged.
The current flowing for one time mainly flows from the electrode 500 through the protective film 406 in the thickness direction to reach water, and then flows from the water through the protective film 406 in the thickness direction to the electrode 501. Therefore,
The impedance of the immersion sensor 50 can be changed greatly by the difference in the current path in the protective film 506 between the above-mentioned immersion and non-immersion.

By doing so, the conductor patterns 500 to 5
02 is protected by a protective film made of, for example, resin or ceramic, and the impedance ratio between when submerged and when not submerged can be increased. In each of the above embodiments, the output signal of the submergence sensor is amplified by the MOS transistor amplifier circuit to output a binary level signal.
Of course, a bipolar transistor amplifier circuit may be used instead of the OS transistor amplifier circuit.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a power window device according to a first embodiment.

FIG. 2 is a partial plan view of the submerged sensor.

FIG. 3 is a partial sectional view of a submerged sensor according to a second embodiment.

FIG. 4 is a partial sectional view of a submerged sensor according to a third embodiment.

[Explanation of symbols]

1 is a window raising / lowering motor composed of a DC motor, 2 is a window raising switching relay, 3 is a window lowering switching relay, 4 is a window controller,
5 is a submergence detection unit, 6 is an operation switch for raising the window at hand,
7 is an operation switch for lowering the window on the hand side, 8 is an operation switch for raising and lowering the window on the remote side, 10 is a printed circuit board (circuit board), 43 is a transistor (power supply switch),
50 is a submergence sensor, 51 is a switching element, 52 is a resistor (bias resistance element), 500 to 502 are conductor patterns, 503 and 504 are openings, 505 is a protective film (obstacle), and 506 is a protective film (high resistance film). )

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masafumi Yamaura 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Tetsuo Ito 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Denso Corporation (72) Inventor Takashi Harada 1-1-1 Showa-cho, Kariya-shi, Aichi F-term in Denso Co., Ltd. DF35 DF36 EE12 EE15 FF06 FF18 5H571 AA03 CC02 EE02 HA04 HA08 LL50

Claims (9)

[Claims] 1. A window raising / lowering motor, a remote-side window raising / window lowering operation switch disposed on a remote side, and a first electric potential varying by opening / closing of the remote-side window raising operation switch. An output terminal, and a window control unit having a second output terminal whose potential changes by operation of the remote-side window lowering operation switch, the first output terminal and one main terminal of the window lifting / lowering motor. A window raising operation switch on the hand side comprising a first changeover switch connected between the first output terminal and one of the high power supply lines to one main terminal of the window raising / lowering motor; The second output terminal and another main terminal of the window lifting motor are interposed between the second output terminal and the other main terminal of the window lifting motor. Window drop near hand consisting of a second changeover switch connected to An operation switch, and a submergence sensor that detects submergence, wherein the window control unit forcibly sets the potentials of the first and second output terminals to a ground potential when the submersion sensor detects submersion. Power window device. 2. The power window device according to claim 1, wherein the window control unit has a common terminal connected to the first output terminal, a first switching terminal supplied with power from a higher power supply line, A switching terminal connected to a ground line, a window raising switching relay that is switched by opening and closing the remote side window raising operation switch; a common terminal connected to the second output terminal; a first switching terminal; Power is supplied from a high-order power supply line, a second switching terminal is connected to a ground line, and a window lowering switching relay that is switched by opening and closing the remote side window lowering operation switch; and the first of the two switching relays A power supply switch interposed between the switching terminal and the high-level power supply line, the power supply switch being interrupted by a submergence detection signal of the submergence sensor. 3. A window elevating motor, a window elevating and window lowering operation switch, a window controller for causing the window elevating motor to perform a window elevating operation by input of a window elevating signal from the operation switch, and A power window device that includes a submergence detection unit that detects submergence, wherein the window control unit performs a predetermined submergence control mode operation by inputting a submergence detection signal from the submergence sensor; A submerged sensor comprising: a power-supply-side electrode supplied from a power source; a ground-side electrode grounded to a ground line; and output electrodes disposed at predetermined intervals on the power-supply-side electrode and the ground-side electrode, respectively. Is a switching element connected to the output electrode of the submerged sensor, smaller than the non-submerged output impedance of the submerged sensor, and smaller than the submerged output impedance Power window device, characterized in that it comprises a bias resistor element connected to the signal input terminal of the switching element to a predetermined potential terminal having a hearing impedance. 4. The power window device according to claim 3, wherein each of the electrodes of the water immersion sensor is formed of a conductor pattern disposed on the surface of the circuit board at a predetermined interval. apparatus. 5. The power window device according to claim 4, wherein the window control unit is mounted on the circuit board. 6. The power window device according to claim 4, wherein the conductor pattern is formed so as to be exposed, and the circuit board is located between the output electrode and the power supply side electrode or the ground side electrode. A power window device having an opening. 7. The power window device according to claim 6, wherein the opening is formed wider at a lower portion than at an upper portion thereof. 8. The power window device according to claim 4, wherein the conductive pattern is formed so as to be exposed, and the circuit board is located between the output electrode and the power supply side electrode or the ground side electrode. A power window device comprising an obstacle made of an insulator and increasing a creeping distance between the output electrode and the power supply side electrode or the ground side electrode. 9. The power window device according to claim 4, further comprising a high resistance film that covers the conductor pattern, has a predetermined electric resistivity, and protects the conductor pattern.