JPH1136706A - Drive circuit for power window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure reliable opening and closing operation while preventing the erroneous operation of a power window when a drive circuit of the power window becomes wet due to ingress of water or dew condensation. SOLUTION: In ordinary time, a power window is closed or opened by driving a motor 3 by constituting a circuit via an opening relay Ro and a closing relay Rs by operating a first opening & closing switch Sd or a second opening & closing switch Sa in a state where the main switch Sm is connected to the first position P1 . If the drive circuit is wet due to ingress of water or dew condensation, both relays Ro, Rs may sometimes have an erroneous operation due to a leak current caused by the ingress of water or dew condensation but, if the second switch Sa is operated in a state where the main switch Sm is transferred to a third position P3 , a circuit not connected to both the relays Ro and Rs is constituted so that definite opening & closing can be assured while preventing the erroneous operation of the power window.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power window driving circuit for driving a motor for opening and closing a power window.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional driving circuit for opening and closing a power window. A first opening / closing switch Sd and a main switch Sm provided in a driver's seat and operated by a driver, and a seat other than the driver's seat. And a second opening / closing switch Sa operated by an occupant other than the driver. The main switch Sm first and switched to position P _1-vehicle 12-volt consisting battery power source 1 and the 0 volt ground 2 are connected, the first on-off switch Sd operation or manipulation of the second opening and closing switch Sa allows opening and closing of the power window by also connecting the switch the main switch Sm to the second position P ₂ to the power supply 1 and the ground 2 is cut off, the first on-off switch S
Opening / closing of the power window becomes impossible even if d is operated or the second opening / closing switch Sa is operated.

A driving circuit is a first line L connected to a power supply 1.₁
And the second line L connected to the ground 2 _TwoBetween the
2 Open / close switch Sa, open relay Ro and close relay
Ray 3 and motor 3 for opening and closing the power window
And the main switch Sm are connected. 2nd opening and closing
Switch Sa is urged to the neutral position by a spring (not shown).
The contact 4 is provided with an open terminal 5o.
Alternatively, it can be connected to the closed terminal 5s.

When the second open / close switch Sa is operated to the open position,
When the contact 4 is connected to the open terminal 5o by the
The coil 6o is excited and the contact 7o is turned off from the OFF terminal 8o
Remotely connected to the ON terminal 9o. As a result, power supply 1 →
1st line L₁→ ON terminal 9o of opening relay Ro and
Contact 7o → 3rd line L_Three→ Motor 3 → 3rd line L _Three
→ Contact 7s and OFF terminal 8s of closing relay Rs → No.
2 lines L_Two→ Main switch Sm → Ground 2 circuit
And the motor 3 is driven in the opening direction to
A window opens. Also, the second open / close switch Sa
When the contact 4 is connected to the closed terminal 5s by operating to the closed position, the contact is closed.
The coil 6s of the relay Rs is excited, and the contact 7s is turned off.
It is connected to the ON terminal 9s apart from the F terminal 8s. That
As a result, power supply 1 → first line L₁→ Close relay Rs ON
Terminal 9s and contact 7s → third line L_Three→ Motor 3 →
Third line L_Three→ Contact 7o of opening relay Ro and OF
F terminal 8o → 2nd line L_Two→ Main switch Sm → G
The circuit of the land 2 is formed, and the motor 3 is driven in the closing direction.
It is moved and the power window is closed.

On the other hand, when the driver operates the first opening / closing switch S
When the contact 10 is connected to the ON terminal 11o by operating d,
Relay Ro-opening from the electronic circuit E through the fourth line L ₄
Is turned on, the opening relay Ro is turned on, the motor 3 is driven in the opening direction, and the power window is opened. Further, when the driver connects the contacts 10 by operating the first opening and closing switch Sd is turned OFF terminal 11s, are energized coil 6s of the closing relay Rs via a fourth line L ₄ from the electronic circuit E, the closing relay Rs Is turned on, the motor 3 is driven in the closing direction, and the power window is closed.

[0006]

When the second opening / closing switch Sa of the drive circuit for the power window is wetted by water immersion or dew condensation, the insulation resistance between the contact 4 and the open terminal 5o, the contact 4 and the closed terminal 5s. Since the insulation resistance between them decreases, both the coils 6o and 6s of the opening relay Ro and the closing relay Rs may be excited to connect both the contacts 7o and 7s to the ON terminals 9o and 9s. As a result, the potential of the third line L ₃ on both sides of the motor 3 are both 12
Therefore, the motor 3 cannot rotate even if the second opening / closing switch Sa is operated in the opening direction or the closing direction, and the power window cannot be opened / closed. In addition, when the insulation resistance between one of the open terminal 5o or the closed terminal 5s and the contact 4 is reduced, a malfunction in which the power window opens and closes freely occurs. Such a problem may also occur when the first opening / closing switch Sd and the electronic circuit E are wet due to flooding or dew condensation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and prevents a malfunction of a power window and enables a reliable opening / closing operation even when a drive circuit of the power window becomes wet due to flooding or dew condensation. With the goal.

[0008]

According to one aspect of the present invention, there is provided a power window driving circuit for driving a motor for opening and closing a power window, comprising: Opening relay that is turned on by operating the switch for opening, closing relay that is turned on by operating the first opening / closing switch, and opening relay that is turned on to drive the motor in the window opening direction by operating the first opening / closing switch. A first circuit connecting the motor to a power supply via
In order to drive the motor in the window closing direction by operating the first opening / closing switch, a second circuit for connecting the motor to the power supply via the closed relay which has been turned on, and in the window opening direction by operating the second opening / closing switch. A third circuit that connects the motor to a power source via a closed relay that is turned off to drive the motor, and an open relay that is turned off to drive the motor in the window closing direction by operating a second open / close switch. A drive circuit for a power window, comprising: a fourth circuit for connecting the motor to a power supply via a power supply; and a main switch for selecting a first position for closing the first to fourth circuits and a second position for opening. A fifth circuit for connecting the motor to a power supply without using an opening relay and a closing relay to drive the motor in the window opening direction by operating the second opening / closing switch; And a sixth circuit for connecting the motor to a power supply without using an opening relay and a closing relay so as to drive the motor in the window closing direction by operating the switch. A third position is provided in which a fourth circuit is opened to close the fifth circuit and the sixth circuit.

According to the above configuration, the main switch is connected to the first switch.
When the first opening / closing switch is operated in a state where the motor is switched to the position, the first circuit or the second circuit is configured through the opened relay or the closed relay, and the motor is moved in the window opening direction or the window closing direction. It can be driven to open and close the power window. If the second opening / closing switch is operated while the main switch is switched to the first position, the third circuit or the fourth circuit is configured via the opened relay or the closed relay. The power window can be opened and closed by driving in the direction or the window closing direction. When the main switch is switched to the second position, the first to fourth circuits are opened, so that the power window cannot be opened or closed even if the first opening / closing switch or the second opening / closing switch is operated.

When the drive circuit is wet by water or condensation, the main switch is switched to the third position.
When the open / close switch is operated, the fifth or sixth circuit is configured without the intermediary of the open or close relay, so that the power window is opened regardless of the malfunction of the open or close relay caused by the leak current. It can be opened and closed reliably.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

1 to 4 show an embodiment of the present invention. FIG. 1 is a diagram showing a drive circuit of a power window.
FIG. 3 is an explanatory view of the operation when the first opening / closing switch is operated, and FIG.
FIG. 4 is an operation explanatory diagram at the time of operating the opening / closing switch, and FIG. In the drive circuits of FIGS. 1 to 4, the same components as those of the conventional drive circuit of FIG. 5 are denoted by the same reference numerals.

As is apparent from a comparison between FIG. 1 and FIG. 5, the drive circuit of the present embodiment shown in FIG. 1 is different from the conventional drive circuit shown in FIG. It is different from the drive circuit. That is,
The second opening / closing switch Sa includes two contacts 12o and 12s that operate in conjunction with each other, and one contact 12o.
Is connected to the terminal 13o when the second open / close switch Sa is operated to the neutral position and the closed position, and is connected to the terminal 14o when the second open / close switch Sa is operated to the open position.
The other contact 12s is connected to the terminal 13 when the second open / close switch Sa is operated to the neutral position and the open position.
s and connected to the terminal 14s when operated to the closed position. As will be described later, the diodes 15 and 16 are for preventing a short circuit in the circuit when the first open / close switch Sd is operated to open / close the power window.

The main switch Sm can switch between a first position P ₁ , a second position P ₂ and a third position P _{3. When} the contact 17 is connected to the first position P ₁ , a first opening / closing switch is provided. be engineered Sd be operated a second opening and closing switch Sa enables opening and closing of the power window, connecting contact 17 to the second position P _2, even by operating the first open-close switch Sd first 2 Even if the open / close switch Sa is operated, the power window cannot be opened / closed, and the contact 17
When connected to the position P _3, even when the driving circuit is leakage current wet by immersion or condensation occurs, it is possible to open and close the power window by the operation of the second on-off switch Sa.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

First, the operation when the power window is opened / closed by the first opening / closing switch Sd operated by the driver will be described with reference to FIG.

[0017] As shown in FIG. 2 (A), in a state where the driver has operated the contacts 17 of the main switch Sm in the first position P _1, the contacts 10 to the open terminal 11o by operating the first open-close switch Sd When connected, the coil 6o of the opening relay Ro is excited by the electronic circuit E, and the contact 7o is separated from the OFF terminal 8o and connected to the ON terminal 9o. As a result, a first circuit C ₁ indicated by a thick solid line is formed, and the motor 3
Is driven in the window opening direction to open the power window. At this time, a short circuit on the high voltage side and the low voltage side of the motor 3 is prevented by the diode 15. FIG. 2
As shown in (B), when the contact 10 is connected to the closing terminal 11s by operating the first opening / closing switch Sd, the coil 6s of the closing relay Rs is excited by the electronic circuit E, and the contact 7 is turned on.
s is separated from the OFF terminal 8s and connected to the ON terminal 9s. As a result, constructed a second circuit C ₂ shown by thick solid lines, the power window is closed the motor 3 is driven in the window closing direction. At this time, the diode 16 prevents a short circuit on the high voltage side and the low voltage side of the motor 3.

Next, an operation when the power window is opened and closed by the second opening / closing switch Sa operated by an occupant other than the driver will be described with reference to FIG.

As shown in FIG. 3 (A), in a state of operating the contacts 17 of the main switch Sm in the first position P _1, terminal contacts 12o occupant other than the driver operates the second opening and closing switch Sa When connected to the terminal 14o away from 13o, consists third circuit C ₃ indicated by a thick solid line, the motor 3 is the power window is opened by being driven by a window opening direction. As shown in FIG. 3B, when the contact 12s is separated from the terminal 13s and connected to the terminal 14s by operating the second opening / closing switch Sa, the fourth circuit C indicated by a thick solid line is obtained.
₄ , the motor 3 is driven in the window closing direction to close the power window.

When the drive circuit gets wet due to flooding or dew condensation, a leakage current flows through the first opening / closing switch Sd and the electronic circuit E, so that the opening relay Ro and the closing relay Rs
May be turned ON together. Then the motor 3 is unrotatable become third line L ₃ are both high potential on both sides of the motor 3, the power window even can not be closed to open. Further, when one of the opening relay Ro and the closing relay Rs is turned on due to the flooding or dew condensation, there is a possibility that the power window may be opened and closed without operating the first opening / closing switch Sd and the second opening / closing switch Sa. is there.

Therefore, when such a situation occurs, the driver operates the main switch Sm as shown in FIG.
The by switching to the third position P _3, it is possible to open and close the power window operation of the second opening and closing switch Sa while preventing malfunction of the power window.

That is, as shown in FIG.
Switch Sm to third position P_ThreeWith the second open
Operate the closing switch Sa to the open position to connect the contact 12o to the terminal.
When connected to 14o, open relay Ro and close relay
Fifth circuit C not passing through Rs _Five(See thick solid line)
The motor 3 is driven in the window opening direction to
A window opens. Also, as shown in FIG.
And the main switch Sm is moved to the third position P._ThreeState switched to
Operating the second open / close switch Sa to the closed position in the contact state.
When 12s is connected to terminal 14s, opening relay Ro and
Circuit C that does not pass through the closing relay Rs₆(Thick solid line
The motor 3 is driven in the window closing direction
Then the power window is closed.

Since the fifth circuit C ₅ and the sixth circuit C ₆ do not pass through neither the opening relay Ro nor the closing relay Rs,
Even if the opening relay Ro or the closing relay Rs malfunctions due to inundation or condensation, the power window can be reliably opened and closed without being affected by the malfunction.

Although the embodiments of the present invention have been described in detail, various design changes can be made in the present invention without departing from the gist thereof.

For example, in the embodiment, the main switch Sm is switched to the third position P ₃ by the operation of the driver. However, a sensor for detecting the inundation or dew of the drive circuit is provided. it may be automatically switched to the third position P ₃ of the main switch Sm upon detecting a.

[0026]

According to the first aspect of the present invention, the main switch is switched to the third position when the drive circuit becomes wet due to flooding or dew condensation, and the second opening / closing switch is operated in this state. When operated, the fifth circuit or the sixth circuit is formed without passing through the opening relay or the closing relay, so that the power window is reliably opened and closed regardless of the malfunction of the opening relay or the closing relay due to a leak current. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing a drive circuit of a power window.

FIG. 2 is an explanatory diagram of an operation when a first opening / closing switch is operated.

FIG. 3 is an explanatory diagram of an operation when a second opening / closing switch is operated.

FIG. 4 is an explanatory view of an action at the time of inundation and dew condensation.

FIG. 5 is a diagram showing a conventional power window drive circuit.

[Explanation of symbols]

1 power supply 3 motor C ₁ first circuit C ₂ second circuit C ₃ third circuit C ₄ fourth circuit C ₅ fifth circuit C ₆ sixth circuit P ₁ first position P ₂ a second position P ₃ third position Ro Opening relay Rs Closing relay Sd First open / close switch Sa Second open / close switch Sm Main switch

Claims (1)

[Claims] 1. A power window drive circuit for driving a motor (3) for opening and closing a power window, comprising: an opening relay (Ro) which is turned on by operating a first opening / closing switch (Sd); (1) A closing relay (Rs) that is turned on by operation of an opening / closing switch (Sd), and an opening relay (Rs) that is turned on to drive a motor (3) in a window opening direction by operating a first opening / closing switch (Sd). a first circuit through a ro) connecting the motor (3) to a power source (1) (C _1), to drive the motor (3) in the window closing direction by the operation of the first on-off switch (Sd) A second circuit (C ₂ ) for connecting the motor (3) to the power supply (1) via a closed relay (Rs) that has been turned on, and a motor in the window opening direction by operating a second opening / closing switch (Sa). To drive (3) A third circuit for connecting off the closing relay (Rs) the motor (3) via the power supply (1) (C _3), the window closing direction by the operation of the second on-off switch (Sa) Motor ( A third circuit (C ₄ ) that connects the motor (3) to the power supply (1) via an open relay (Ro) that is turned off, to drive the third circuit (C _1); And a main switch (Sm) for selecting a first position (P ₁ ) for closing C ₄ ) and a second position (P ₂ ) for opening the second opening / closing switch. Opening relay (Ro) to drive motor (3) in the window opening direction by operation (Sa)
And a fifth circuit (C ₅ ) for connecting the motor (3) to the power supply (1) without passing through the relay (Rs) for closing, and the motor ( 3) Opening relay (Ro) to drive
And a sixth circuit (C ₆ ) for connecting the motor (3) to the power supply (1) without passing through the closing relay (Rs). 4 circuit (C ₁ -C ₄₎ and opens the by the fifth circuit (C ₅₎ and the sixth circuit third position power window, characterized in that a (P ₃₎ which closes the (C ₆₎ Drive circuit.