JP3535351B2 - Power window device - Google Patents

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 installed in a vehicle.

[0002]

2. Description of the Related Art Generally, a power window device is used to automatically open and close a window glass such as a side door of a vehicle. A power window switch circuit is provided in the power window device. When the passenger turns on the manual up switch (up switch) or down switch (down switch) provided in the power window switch circuit, the window glass is driven up or down. There is.

FIG. 2 shows an example of an electric circuit of a conventional power window device. The power window switch circuit 5 includes a lowering switch 7 and a raising switch 8. The movable contacts of the down switch 7 and the up switch 8 are
When the movable contact 9 is used in common and the pressure is released, the movable contact 9 is positioned at a neutral position where it does not come into contact with any fixed contact by a biasing means (not shown). The lowering switch 7 and the raising switch 8 are, for example, tumbler type switches. When one side is pressed, the lowering switch 7 functions as the lowering switch 7, and when the other side is pressed, the lowering switch 7 functions as the raising switch 8. The raising switch 8 is prevented from being turned on. Also, the lowering switch 7 and the raising switch 8
Is a two-step click type, and when it is pressed in the first step, it is turned on as a manual switch, and the movable contact 9 is connected to the fixed contact between points a and b in FIG.

Further, the lowering switch 7 and the raising switch 8
When it is pressed to the second stage, it functions as an auto switch, and the common terminal c is simultaneously connected to the auto operation contact d and the fixed contact a. Then, the automatic operation contact d
When is connected to the common terminal c, a low level signal is input to the door electronic control unit ((Electronic Control Unit, hereinafter, referred to as door ECU) 6).

Fixed contacts a and b of the lowering switch 7 are also provided.
Is connected to the battery power source B via the coil 10 and is also connected to the terminal of the door ECU 6. The fixed contacts a and b of the raising switch 8 are connected to the battery power source B via the coil 11 and also to the terminals of the door ECU 6.

Next, the relay circuit 4 will be described. The relay circuit 4 includes a descending coil 10 and a descending relay contact 1.
2, a rising coil 11, and a rising relay contact 13 are provided.

Further, the drive motor M, which is a direct current motor for driving the window glass of the vehicle upward or downward, has both terminals thereof connected to a descending relay contact 12 and an ascending relay contact 13. The descending relay contact 12 is switchably connectable to the ground side contact 12a and the power supply side contact 12b, and is normally connected to the ground side contact 12a. or,
The rising relay contact 13 is switchably connectable to the ground side contact 13a and the power supply side contact 13b, and is normally connected to the ground side contact 13a.

When a low level signal is input through the automatic operation contact point d, the door ECU 6 supplies an exciting current flowing in the coil 10 or the coil 11 through an input terminal of the door ECU 6 to a switching circuit built in the door ECU 6. Etc. are controlled to flow to the ground terminal of the door ECU 6.

When the lowering switch 7 is operated as a manual switch, the coil 10 is excited, the relay contact 12 is connected to the power source side contact 12b, and the drive motor M rotates. As a result, a wire type or arm type regulator (not shown) is driven by the drive motor M to lower the window glass.

When the raising switch 8 is operated as a manual switch, the coil 11 is excited and the relay contact 13 is connected to the power source side contact 13b to rotate the drive motor M. As a result, a wire type or arm type regulator (not shown) is driven by the drive motor M to raise the window glass.

On the other hand, when the lowering switch 7 is operated as an auto switch, the door ECU 6 controls the exciting current flowing through the coil 10. As a result, the coil 10 is similarly excited, so that the relay contact 12 is connected to the power source side contact 12b to rotate the drive motor M. As a result, a wire type or arm type regulator (not shown) is driven by the drive motor M to lower the window glass. When the raising switch 8 is operated as an automatic switch, the door ECU 6 controls the exciting current flowing through the coil 11. As a result, the coil 11 is similarly excited, so that the relay contact 13 is connected to the power supply side contact 13b,
The drive motor M is rotated. As a result, a wire type or arm type regulator (not shown) is driven by the drive motor M to raise the window glass.

After the pushing operation is once performed, even if the pushing operation of the lowering switch 7 or the raising switch 8 is released, the window glass is raised or lowered until it reaches the fully closed position or the fully opened position. When the ascending window glass is in the fully closed position, a fully closed position limit switch (not shown) detects it, and when the descending window glass is in the fully opened position, a fully open position limit switch (not shown) detects it. It is designed to work.

When one of the limit switches detects, the door ECU 6 cuts off the exciting current by a built-in switching circuit or the like based on the detection, and degausses the coils 10 and 11 of the relay circuit 4, The drive motor M is stopped and the window glass is held at the fully open position or the fully closed position.

As described above, conventionally, when the window glass is automatically performed, the relay circuit 4 is controlled by the door ECU 6.

[0015]

However, when the vehicle is immersed in water and the relay circuit 4 gets wet with water, the relay contact 1
2a and the power supply side contact 12b, and the relay contact 13a and the power supply side contact 13b both leak simultaneously. Therefore, since the same potential is applied to both terminals of the drive motor M, even if the down switch 7 and the up switch 8 are turned on, they are not driven.

The present invention has been made to solve the above problems, and even when the relay contact of the relay circuit of the power window device is wet with water and leaks, the down switch or the up switch is turned on. It is an object of the present invention to provide a power window device capable of operating a window glass in such a case.

[0017]

In order to solve the above-mentioned problems, the invention according to claim 1 operates a drive source for driving a window glass up and down and, when turned on, operates the drive source. Switch circuit for lowering the window glass and a switch circuit including a raising switch for operating the drive source to raise the window glass when turned on, and a switch circuit connected to the drive source and turned on. A first relay contact that activates the drive source to lower the window glass during operation, and is connected to the drive source,
A second relay contact that activates the drive source to raise the window glass during the on operation, a first coil that activates and deactivates the first relay contact, and a second relay contact that activates and deactivates the second relay contact. Control circuit for exciting the first coil or the second coil based on the predetermined operation when the first relay circuit including the coil and the down switch or the up switch is turned on by the predetermined operation. And a relay circuit disabling means for disabling the operation of the first relay circuit when both the first relay contact and the second relay contact of the relay circuit are leaking. It is what

A second aspect of the present invention provides the power window device according to the first aspect, wherein the relay circuit invalidating means is a ground circuit that grounds the positive terminal sides of the first coil and the second coil. Is.

According to a third aspect of the present invention, in the second aspect, the ground circuit is a dummy relay circuit having a relay contact capable of grounding the positive terminal side of the first coil and the second coil. The gist of the disclosed power window device is.

According to a fourth aspect of the present invention, in the dummy relay circuit according to the third aspect, when the first relay contact and the second relay contact of the first relay circuit are both leaking, 4. The power window device according to claim 3, wherein the relay contact of the circuit is also leaked so that the potentials across the first coil and the second coil are made equal to invalidate the operation of the relay circuit. To do.

(Operation) According to the invention described in claim 1,
In the manual operation, when the lowering switch or the raising switch is turned on, the drive source is operated to lower or raise the window glass.

The control means, when turned on by a predetermined operation of the down switch or the up switch, controls the excitation of the first coil or the second coil based on the predetermined operation. By this control, the first coil or the second coil
Is excited, and the first relay contact or the second relay contact is turned on. As a result, the drive source is activated to lower or raise the window glass.

When both the first relay contact and the second relay contact of the first relay circuit are leaking, the relay circuit invalidating means invalidates the operation of the first relay circuit. Therefore, when the lowering switch or the raising switch is manually turned on, the drive source is operated to lower or raise the window glass.

According to the invention of claim 2, in the operation of claim 1, the ground circuit operates the first relay circuit by grounding the positive terminal sides of the first coil and the second coil. Disable.

According to the invention of claim 3, in claim 2, the action is obtained by the dummy relay circuit having the relay contact capable of grounding the positive terminal side of the first coil and the second coil.

According to the invention of claim 4, in claim 3, in the dummy relay circuit, when both the first relay contact and the second relay contact of the first relay circuit are leaking, The relay contact also leaks to equalize the potentials across the first coil and the second coil, thereby invalidating the operation of the first relay circuit.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is embodied in a power window device 1 for an automobile as a vehicle will be described below with reference to FIG.

FIG. 1 shows an electric circuit diagram of the power window device 1. The power window device 1 of this embodiment is provided on a side door (not shown) of a driver's seat of an automobile.

The power window device 1 includes a door electronic control unit (hereinafter referred to as a door ECU) 21, a first relay circuit 22, and a second relay circuit 2.
3, power window switch circuit 24, drive motor M
Is equipped with. The first relay circuit 21 and the second relay circuit 23 are arranged close to each other so that when the vehicle is immersed in water, the first relay circuit 21 and the second relay circuit 23 are simultaneously immersed in water.

The door ECU 21 corresponds to control means, the power window switch circuit 24 corresponds to a switch circuit, and the drive motor M constitutes a drive source. This power window switch circuit 24 includes a lower switch 2
5. The raising switch 26 and the automatic operation switches (hereinafter referred to as auto switches) 27A and 27B are provided.

Down switch 25 and up switch 26
Are respectively connected to both terminals of the drive motor M.
The lowering switch 25 and the raising switch 26 are, for example, tumbler type switches. When one side is pressed, the lowering switch 25 and the raising switch 26 function as the lowering switch 25. When the other side is pressed, the lowering switch 25 and the raising switch 26 function. The raising switch 26 is prevented from being turned on.

The movable contact 25c of the lowering switch 25 is switchably connectable to the ground side fixed contact 25a and the power source side fixed contact 25b. Further, the movable contact 26c of the raising switch 26 includes a ground side fixed contact 26a and a power source side fixed contact 26c.
It can be switched and connected to b. The lowering switch 25 and the raising switch 26 are always provided with the movable contacts 25c and 26c by a grounding fixed contact 2 by a spring or the like not shown.
5a and 26a.

The lowering switch 25 and the raising switch 26 are of a two-step click type, and when pressed in the first step, they are turned on as manual switches.
The lower switch 25 and the upper switch 26 are set to 2
When pressed down to the step, the auto switches 27A, 27
B turns on.

The auto switches 27A and 27B are electrically connected to the door ECU 21 via a fixed contact 27a, a movable contact 27b and a fixed contact 27c. The movable contact 27b of the auto switch 27 is normally positioned at the off position by a spring (not shown).

When the lower switch 25 is operated, the movable contact 27b of the auto switch 27A is connected to the fixed contacts 27a and 27c, and when the switch is turned on, the door E is closed.
A high level down signal is input to the CU 21.

By operating the raising switch 26,
The movable contact 27b of the auto switch 27B is the fixed contact 27.
When connected to a and 27c and turned on, the door ECU
A high-level up signal is input to 21.

Explaining the first relay circuit 22, the first relay circuit 22 comprises a coil 29 of the first relay R1 and a coil 30 of the second relay R2, and the positive terminals of both coils 29, 30 are the door ECU 21. Are connected to the output terminals of. The negative terminals of both coils 29 and 30 are connected to the ground terminal of the door ECU 21, respectively. Then, the door ECU 21 can control the excitation of each of the coils 29 and 30 by an exciting current supplied from a power supply circuit (not shown) of the door ECU 21 via the output terminal.

The relay contact 31 of the first relay R1 is connected to the ground side fixed contact 25a of the descending switch 25. The relay contact 31 is switchably connectable to the grounded side fixed contact 31a which is grounded and the power source side fixed contact 31b which is connected to the battery power source B. Normally, the relay contact 31 is biased by a spring (not shown) and connected to the ground side fixed contact 31a. And the coil 29
Is excited, the relay contact 31 is switched and connected to the power source side fixed contact (battery power source B) 31b.

The relay contact 32 of the second relay R2 is connected to the ground side fixed contact 26a of the raising switch 26. The relay contact 32 is switchably connectable to the grounded side fixed contact 32a which is grounded and the power source side fixed contact 32b which is connected to the battery power source B. Normally, the relay contact 32 is biased by a spring (not shown) and is connected to the ground side fixed contact 32a. When the coil 30 is excited, the relay contact 32 is connected to the power supply side fixed contact (battery power supply B) 32b.

The relay contact 31 of the first relay R1 is
The coil 29 corresponds to the first relay contact, and the coil 29 corresponds to the first coil. Also, the relay contact 3 of the second relay R2
2 corresponds to a second relay contact, and the coil 30 has a second
Equivalent to the coil.

The second relay circuit 23 comprises a coil 33 and a relay contact 34. The negative terminal of the coil 33 is grounded, and the positive terminal is connected to the battery power source B via the normally open switch 35. Switch 3
5 is composed of a ground side fixed contact 35a, a movable contact 35b, and a power source side fixed contact 35c. Further, the relay contact 34 is the coil 2 of the first and second relays R1 and R2.
It is connected to the negative terminals of 9, 30. The relay contact 34 includes a dummy fixed contact 34a and a ground side fixed contact 3
4b can be switched and connected, and a spring (not shown) at all times
And is connected to the dummy fixed contact 34a.

When the switch 35 is turned on, the movable contact 35b connects between the fixed contacts 35b and 35c, so that the coil 33 is excited and the relay contact 34 is formed.
Is connected to the ground side fixed contact 34b from the dummy fixed contact 34a and turned on, and the positive terminals of the coils 29 and 30 of the first relay R1 and the second relay R2 are grounded.

The second relay circuit 23 constitutes a relay circuit invalidating means, a ground circuit, and a dummy relay circuit.
The second relay circuit 23 is the same as the first relay circuit 2
2 is provided close to the first relay circuit 22.
Is immersed in water, the second relay circuit 23 is also arranged so as to be immersed in water. When the second relay circuit 23 is soaked in water, the relay contacts 34 can leak between the ground side fixed contacts 34b.

The door ECU 21 is a CPU (not shown).
(Central processing unit), ROM (read only memory), RAM (read and write memory) and the like. Then, when a high-level down signal is input, the door ECU 21 supplies an exciting current to the coil 29 of the first relay R1 via a power supply circuit (not shown) based on the down signal.

When a high level up signal is input, the door ECU 21 supplies an exciting current to the coil 30 of the second relay R2 via a power supply circuit and a switching circuit (not shown) based on the up signal. .

The coil 29 of the first relay R1
Alternatively, when an exciting current flows through the coil 30 of the second relay R2, the relay contact 31 or the relay contact 32 is connected to the power supply side fixed contact 31b or 32b by the excitation of the coil 29 or the coil 30. As a result, the drive motor M as a drive source is normally or reversely rotated, and a wire-type or arm-type regulator (not shown) is driven by the drive motor M to lower or raise the window glass.

A full-open position limit switch (not shown) is electrically connected to the door ECU 21, and when the descending window glass is located at the full-open position, the full-open position limit switch detects and operates the door ECU 21. Output the detection signal. The door ECU 21 controls a built-in switching circuit or the like based on the detection signal to stop the supply of the exciting current and demagnetize the coil 29 of the first relay R1.

Further, a fully closed position limit switch (not shown) is electrically connected to the door ECU 21, and when the ascending window glass is located at the fully closed position, the fully closed position limit switch is activated to detect the door. ECU 21
The detection signal is output to. The door ECU 21 controls a built-in switching circuit or the like based on the detection signal to stop the supply of the exciting current and demagnetize the coil 30 of the second relay R2.

Now, the operation of the power window device 1 configured as described above will be described. (Normally) When the lowering switch 25 is used as a manual switch and turned on up to the first step, the movable contact 25c becomes the ground side fixed contact 25.
Switching connection is made from a to the fixed contact 25b on the power supply side. As a result, the drive motor M as a drive source is rotated in the forward direction, and a wire type or arm type regulator (not shown) is driven by the drive motor M to lower the window glass.
When the down operation of the lowering switch 25 is released, the movable contact 25c is switched from the power supply side fixed contact 25b to the ground side fixed contact 25a by the spring action of a spring (not shown), and the drive motor M is stopped.

When the raising switch 26 is used as a manual switch and turned on up to the first step, the movable contact 26
c is switched from the ground side fixed contact 26a to the power source side fixed contact 26b. As a result, the drive motor M as a drive source is reversely rotated, and a wire type or arm type regulator (not shown) is driven by the drive motor M to raise the window glass. When the raising switch 26 is released from the ON operation, the movable contact 26c is switched from the power supply side fixed contact 26b to the ground side fixed contact 26a by the spring action of a spring (not shown), so that the drive motor M is stopped.

Next, when the lowering switch 25 is turned on up to the second stage and then the pressing is released, the movable contact 27b of the auto switch 27A has the fixed contacts 27a and 27a.
When the door ECU 21 is connected to c and is turned on, a high-level down signal is input to the door ECU 21. Then the door ECU
21 supplies an exciting current to the coil 29 of the first relay R1 via a power supply circuit (not shown) based on the high-level down signal. When an exciting current flows through the coil 29 of the first relay R1, the coil 29 is excited and
The relay contact 31 is switched from the ground side fixed contact 31a to the power source side fixed contact 31b. As a result, the drive motor M as a drive source is rotated in the forward direction, and a wire type or arm type regulator (not shown) is driven by the drive motor M to lower the window glass.

When the descending window glass is located at the fully open position, a fully open position limit switch (not shown) operates to detect the door ECU 2 based on the detection.
Reference numeral 1 cuts off the exciting current by a built-in switching circuit or the like to demagnetize the coil 29 of the first relay R1. As a result, the drive motor M is stopped and the window glass is held in the fully open position.

On the other hand, when the raising switch 26 is turned on up to the second step, the movable contact 27b of the auto switch 27B is connected to the fixed contacts 27a and 27c to be turned on, and a high level up signal is input to the door ECU 21. To be done. Then, the door ECU 21 supplies an exciting current to the coil 30 of the second relay R2 via the power supply circuit and the switching circuit (not shown) based on the high level up signal. When an exciting current flows through the coil 30 of the second relay R2, the coil 30 is excited to move the relay contact 32 from the ground side fixed contact 32a to the power source side fixed contact 3a.
2b is switched and connected. As a result, the drive motor M as a drive source is reversely rotated, and a wire type or arm type regulator (not shown) is driven by the drive motor M to raise the window glass.

When the ascending window glass is located at the fully closed position, the fully closed position limit switch (not shown) operates to detect the door ECU 2 based on the detection.
Reference numeral 1 cuts off the exciting current by a built-in switching circuit and demagnetizes the coil 30 of the second relay R2. As a result, the drive motor M is stopped and the window glass is held in the fully closed position.

(When the first relay circuit 22 and the second relay circuit 23 are submerged) When the vehicle is submerged in water and the first relay circuit 22 and the second relay circuit 23 are submerged in water, the first
In the relay circuit 22, leakage occurs between the relay contact 31 and the power supply side fixed contact 31b and between the relay contact 32 and the power supply side fixed contact 32b. At this time, in the second relay circuit 23, water leaks between the ground side fixed contact 35a and the power source side fixed contact 35c.

As a result, the coil 33 is excited, the relay contact 34 is connected from the dummy fixed contact 34a to the ground side fixed contact 34b and turned on, and the coils 29 and 30 of the first relay R1 and the second relay R2 are turned on. The positive terminal of is grounded.

Since the negative terminals of the coils 29 and 30 are connected to the ground terminal of the door ECU 21, both terminals of the coils 29 and 30 have the same potential, and the coils 29 and 30 are excited in any case. There is no such thing.

In this state, when the lowering switch 25 is used as a manual switch and turned on, the movable contact 2
5c is from the ground side fixed contact 25a to the power source side fixed contact 25b
Is switched and connected to. As a result, the drive motor M as a drive source is rotated in the forward direction, and a wire-type or arm-type regulator (not shown) is driven by the drive motor M to lower the window glass. Then, when the lower switch 25 is released from the ON operation as in the normal state, the movable contact 25c is moved to the power source side fixed contact 2 by the spring action of a spring (not shown).
Since 5b is switched and connected to the ground side fixed contact 25a,
The drive motor M is stopped.

If necessary, when the raising switch 26 is turned on as a manual switch, the movable contact 2 is turned on.
6c is from the ground side fixed contact 26a to the power source side fixed contact 26b
Is switched and connected to. As a result, the drive motor M as a drive source is reversely rotated, and a wire type or arm type regulator (not shown) is driven by the drive motor M to raise the window glass. When the raising switch 26 is released from the ON operation as in the normal state, the movable contact 26c is switched and connected from the power supply side fixed contact 26b to the ground side fixed contact 26a by the spring action of a spring (not shown). Will stop.

When the down switch 25 and the up switch 26 are turned on up to the second stage respectively and the down signal and the up signal are input to the door ECU 21 by turning on the auto switches 27A and 27B, the door ECU 21
Supplies an exciting current to the coil 29 or the coil 30,
Since the positive terminals of the coils 29 and 30 are grounded because the second relay circuit 23 leaks, the coils 29 and 30 are not excited.

Now, according to this embodiment, the following operational effects are obtained. (1) In the present embodiment, the first relay circuit 22 gets wet with an electrolyte such as water, and the relay contact 31 and the power supply side fixed contact 31b.
When the relay contact 32 and the power supply side fixed contact 32b leak between the two fixed contacts 35b and 35c of the switch 35 of the second relay circuit 23 arranged in the vicinity of the first relay circuit 22, the leak is caused.

As a result, the positive terminals of the coils 29 and 30 of the first relay R1 and the second relay R2 are grounded.
Since the negative terminals of the coils 29, 30 are connected to the ground terminal of the door ECU 21, both terminals of the coils 29, 30 have the same potential, and the coils 29, 30 are never excited in any case. Absent.

Then, the drive motor M has the lowering switch 2
By turning on 5 as a manual switch, the drive motor M is normally driven. Even if the first relay circuit 22 gets wet with water or the like due to flooding, by turning on the lowering switch 25, the window glass can be lowered.

(2) In this embodiment, even if the first relay R1 and the second relay R2 of the first relay circuit 22 are in the leak state, the drive motor M manually switches the raising switch 26 to the manual switch if necessary. Then, the drive motor M is driven in the reverse direction. First
Even if the relay circuit 22 gets wet with water or the like by flooding, the window glass can be raised by turning on the raising switch 26.

The embodiment of the present invention can be modified as follows in addition to the above embodiment. (1) In the above embodiment, the power window switch circuit 24 is premised on the side door of the driver's seat, but it is not essential to provide it on the side door.
For example, it may be provided in the console between the driver's seat and the passenger seat, or may be provided in the instrument panel or the like.

Here, in addition to the technical idea described in the claims, the technical idea grasped by the above-described embodiment will be listed below together with its effect. (1) The power window device according to claim 1, wherein an auto switch is connected to the control means, and the auto switch is turned on based on a predetermined operation of a down switch or an up switch. By doing so, the ON signal is input to the control means by the auto switch. In the embodiment, the ON signal corresponds to a high level up signal and a high level down signal.

[0067]

As described in detail above, according to the inventions of claims 1 to 4, even when the relay contact of the relay circuit of the power window device is wet and leaked, the down switch or When the raising switch is turned on, the window glass can be operated.

According to the second aspect of the invention, the grounding circuit grounds the positive terminal sides of the first coil and the second coil, so that the operation of the first relay circuit can be invalidated. According to the invention of claim 3, the effect of claim 2 is obtained by the dummy relay circuit having the relay contact capable of grounding the positive terminal side of the first coil and the second coil.

According to the invention of claim 4, when the dummy relay circuit is in a state where both the first relay contact and the second relay contact of the first relay circuit are leaking, the relay contact is also leaking. Thus, the potentials at both ends of the first coil and the second coil can be equalized, and the operation of the first relay circuit can be invalidated.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing an electric configuration of a power window device according to an embodiment.

FIG. 2 is an electric circuit diagram of a conventional power window device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Power window device, 21 ... Door ECU (constituting control means), 22 ... First relay circuit, 23 ... Second relay circuit (constituting relay circuit invalidating means, ground circuit, dummy relay circuit), 24 ... Power window switch circuit (constituting a switch circuit), 25 ... down switch, 26 ... up switch, 27A ... auto switch,
27B ... Auto switch, 29 ... Coil (constituting first coil), 30 ... Coil (constituting second coil), 31 ... Relay contact (constituting first relay contact), 32 ... Relay contact (Constitutes second relay contact), 33 ... coil, 34 ... relay contact, M ... drive motor (constitutes drive source), R1 ... first relay, R2 ... second relay.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05F 15/16 B60J 1/17

Claims (4)

(57) [Claims] 1. A drive source for driving a window glass up and down, a down switch for operating the drive source to lower the window glass when turned on, and a drive source for turning the drive source on. A switch circuit including an ascending switch for actuating to raise the window glass; a first relay contact connected to the drive source to actuate the drive source to lower the window glass when turned on; A second relay contact that is connected to a drive source and that activates the drive source to raise the window glass when turned on; and a first relay contact that turns on and off the first relay contact
And a first relay circuit including a second coil for turning on and off the second relay contact, and when the down switch or the up switch is turned on by a predetermined operation, based on the predetermined operation. When the control means for controlling the excitation of the first coil or the second coil and the first relay contact and the second relay contact of the relay circuit are both leaking, the operation of the relay circuit is invalidated. And a power window device having a relay circuit invalidating means. 2. The power window device according to claim 1, wherein the relay circuit invalidating unit is a ground circuit that grounds the positive terminal sides of the first coil and the second coil to ground. 3. The power window device according to claim 2, wherein the grounding circuit is a dummy relay circuit having a relay contact capable of grounding the positive terminal side of the first coil and the second coil. 4. The dummy relay circuit is configured such that when both the first relay contact and the second relay contact of the first relay circuit are leaking, the dummy relay circuit also leaks the relay contact of the dummy relay circuit. 4. The power window device according to claim 3, wherein the first coil and the second coil are made equal in potential across each other to invalidate the operation of the relay circuit.