JP3828638B2 - Power window drive circuit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power window driving circuit for driving a motor that opens and closes a power window.
[0002]
[Prior art]
FIG. 7 shows a drive circuit that opens and closes the power window by operating the operation switch S provided in the driver's seat. A 5-position operation switch S operated by a passenger between a first line L ₁ connected to a power source 1 composed of a 12-volt battery mounted on the vehicle and a second line L ₂ connected to a ground 2 of 0 volt, and power An opening relay Ro that is turned on when the window is opened and a closing relay Rs that is turned on when the power window is closed are connected. The operation switch S includes a contact 3 that is biased to a neutral position by a spring (not shown). The contact 3 is connected to an open terminal 4o, a closed terminal 4s, an open auto terminal 4ao, and a closed auto terminal 4as by an occupant operation. Connectable.
[0003]
FIG. 8 shows the operation knob of the operation switch S. When the operation switch S is operated from the neutral position to the left open position (1), the power window is driven in the opening direction only while the contact 3 is connected to the open terminal 4o. When the neutral position is operated to the right closed position (2), the power window is driven in the closing direction only while the contact 3 is connected to the closed terminal 4s. When the operation switch S is operated to the left open auto position (3), the contact 3 is connected to the open terminal 4o and the open auto terminal 4ao, and when operated to the right closed auto position (4), the contact 3 is closed. Connect to terminal 4s and closed auto terminal 4as. In the electronic circuit E, once the operation switch S is operated to the open auto position (3) or the closed auto position (4), the power window is fully opened or fully closed even if the operation switch S is subsequently returned to the neutral position. The driving of the motor 9 is continued until
[0004]
Returning to FIG. 7, when the operation switch S is operated to the open position (1) and the contact 3 is connected to the open terminal 4o, the coil 5o of the opening relay Ro is excited, and the contact 6o is separated from the OFF terminal 7o to the ON terminal. Connected to 8o. As a result, the power source 1 → the first line L ₁ → the ON terminal 8o and the contact 6o of the opening relay Ro → the third line L ₃ → the second terminal 9 _{2 of the} motor 9 → the motor 9 → the first terminal 9 ₁ of the motor 9 The third line L ₃ → the contact 6 s and the OFF terminal 7 s of the closing relay Rs → the second line L ₂ → the ground 2 is configured, and the motor 9 is driven in the opening direction to open the power window.
[0005]
When the operation switch S is operated to the closed position (2) and the contact 3 is connected to the closed terminal 4s, the coil 5s of the closing relay Rs is excited and the contact 6s is separated from the OFF terminal 7s and connected to the ON terminal 8s. The As a result, the power source 1 → the first line L ₁ → the ON terminal 8s and the contact 6s of the closing relay Rs → the third line L ₃ → the second terminal 9 _{2 of the} motor 9 → the motor 9 → the first terminal 9 ₁ of the motor 9 The third line L ₃ → the contact 6 o and the OFF terminal 7 o of the opening relay Ro → the second line L ₂ → the ground 2 circuit is constructed, and the motor 9 is driven in the closing direction to close the power window.
[0006]
The Connecting control switch S to open the AUTO position (3) or contact 3 is operated in the closed automatic position (4) to open the automatic terminal 4ao or closed automatic terminal 4as, the electronic circuit E through the fourth line L ₄ is energized, the electronic circuit E is a coil 5s energizes the coil 5o or closing relay Rs relay Ro-opening via a fifth line L _5, and drives the motor 9 in the opening direction or the closing direction. Note that the sixth line L ₆ that connects the electronic circuit E and the third line L ₃ is for stopping the driving of the motor 9 when pinching occurs when the power window is closed automatically.
[0007]
[Problems to be solved by the invention]
By the way, when the operation switch S of the drive circuit of the power window is wetted due to water immersion or condensation, the insulation resistance between the contact 3 and the open terminal 4o and the insulation resistance between the contact 3 and the closed terminal 4s are reduced. In some cases, both the coils 5o and 5s of the relay Ro and the closing relay Rs are excited to connect both the contacts 6o and 6s to the ON terminals 8o and 8s. As a result, the potentials of the third lines L ₃ on both sides of the motor 9 are both 12V, so that the motor 9 cannot rotate regardless of whether the operation switch S is operated in the opening direction or the closing direction. Cannot be opened or closed.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to enable at least an operation in the opening direction of the power window even when the drive circuit of the power window gets wet due to water immersion or condensation.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a power window driving circuit for driving a motor that opens and closes a power window, and the motor is used as a power source to drive the motor in the window opening direction. The opening relay to be connected, the closing relay to connect the motor to the power source to drive the motor in the window closing direction, the coil of the opening relay is connected to the power source by the operation in the window opening direction, and the window closing Operates in conjunction with the operation switch that connects the coil of the closing relay to the power supply by the operation in the direction and the operation switch in the window opening direction, and opens the circuit between one terminal of the motor and the closing relay It operates in conjunction with the operation of the first interlocking switch and the operation switch in the window opening direction, and the other terminal of the motor is connected to the power supply and connected to the window. Characterized by comprising a second interlock switch for driving the dough opening direction.
[0010]
According to the above configuration, when the operation switch gets wet due to water immersion or dew condensation, the insulation resistance decreases, the coils of the open relay and close relay both excite, and both terminals of the motor become both high potential and the power window Cannot be opened or closed. However, when the operation switch is operated in the opening direction, the first interlocking switch that operates in conjunction with the operation in the opening direction of the operation switch opens the circuit between the motor and the closing relay, so that the closing relay is closed. Regardless, one terminal of the motor is kept at a low potential, and the high voltage of the power source is applied to the other terminal of the motor by the second interlocking switch that operates in conjunction with the operation in the opening direction of the operation switch. The motor can be driven in the opening direction.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on reference examples and examples of the present invention shown in the accompanying drawings.
[0012]
1 to 3 show a reference example of the present invention, FIG. 1 is a diagram showing a drive circuit for a power window, FIG. 2 is a diagram for explaining the operation during normal operation, and FIG. 3 is a diagram for explaining the operation at the time of water immersion / condensation. is there. In the drive circuit shown in FIGS. 1 to 3, the same components as those in the conventional drive circuit shown in FIG.
[0013]
As is clear from a comparison of FIGS. 1 and 7, the drive circuit of the reference example shown in FIG. 1 has three interlocking switches S ₁ , S ₂ , S _3, and the conventional drive circuit shown in FIG. 7 lines L ₇ are added. The three interlocking switches S ₁ , S ₂ and S ₃ are mechanically interlocked with the operation switch S. When the operation switch S is operated to the open position (1) in FIG. 7, 11 and 12 are connected to the terminal b, and when the operation switch S is operated to a position other than the open position (1), the contacts 10, 11, 12 are connected to the terminal a and are shown in FIG. The same circuit as the conventional driving circuit is configured.
[0014]
Then, when connected to the terminal b releases the control switch S is operated to the open position (1) to three interlock switches S _1, S _2, contacts 10, 11, 12 S ₃ from the terminal a, shown in FIG. 2 Thus, one end of the first line L ₁ is disconnected from the power source ₁ by the interlock switch S ₁ and one end of the seventh line L ₇ is connected to the power source 1, and the terminal 6 o of the opening relay Ro and the motor are connected by the interlock switch S _2. 9 the other end of the second terminal 9 connected between ₂ is cut off seventh line L ₇ is connected to the second terminal 9 _second motors 9, interlock switches S ₃ by closing relay Rs contacts 6s and the motor 9 The first terminal 9 ₁ is disconnected and the first terminal 9 ₁ of the motor 9 is connected to the ground 2 .
[0015]
Next, the operation of the reference example of the present invention having the above-described configuration will be described.
[0016]
When the operation switch S is not wet due to water immersion or condensation, the drive circuit performs substantially the same operation as the conventional one shown in FIG. However, only when the operation switch S is operated to the open position (1) to open the power window, the motor 9 is driven through a path through which currents are different. That is, as shown in FIG. 2, when the operation switch S is operated to the open position (1) and the contact 3 is connected to the open terminal 4o, the contacts 10, 11, and 3 of the three interlocking switches S ₁ , S ₂ , S ₃ are connected. Since 12 is connected to the terminal b away from the terminal a, the contact 3 of the operation switch S is disconnected from the power source 1 and the coil 5o of the opening relay Ro is not excited. Therefore, the contact 6o of the opening relay Ro remains connected to the OFF terminal 7o, and the motor 9 is not driven via the opening relay Ro. However, the three interlocking switches S _1, S _2, by contact 10, 11, 12 S ₃ is connected to the terminal b away from the terminal a, the power supply 1 → interlock switch S ₁ of the contact 10 and the terminal b → Seventh line L ₇ → terminal b and contact 11 of interlock switch S ₂ → third line L ₃ → second terminal 9 _{2 of} motor 9 → motor 9 → first terminal 9 ₁ of motor 9 → contact of interlock switch S ₃ 12 and the terminal b → second line L ₂ → ground 2, current flows, and the motor 9 is driven in the window opening direction to open the power window. The operation when the operation switch S is operated to the closed position (2), the open auto position (3), and the closed auto position (4) is the same as the conventional one described in FIG.
[0017]
When the operation switch S gets wet due to water immersion or condensation, the conventional relay described in FIG. 7 turns on the opening relay Ro and the closing relay Rs with a leakage current, and the first terminals 9 _{1 at} both ends of the motor 9 are turned on. and since the second terminal 9 ₂ becomes high potential both 12 volt, a problem that can not be operated the operation switch S in any position to drive the motor 9.
[0018]
However, according to the reference example , the power window can be opened by operating the operation switch S to the open position (1) even at the time of flooding or condensation. The reason will be described below.
[0019]
As shown in FIG. 3, connects the flooding or when dew condensation during the interlocking operation switch S open position three by operating the (1) switches S _1, S _2, contacts 10, 11, 12 S ₃ to the terminal b Then, as described with reference to FIG. 2, a circuit for driving the motor 9 in the window opening direction via the seventh line L ₇ is configured. At the same time, a leakage current indicated by a broken line arrow flows through the operation switch S and the interlock switches S ₁ and S _{3 due} to water immersion or condensation, so that both the opening relay Ro and the closing relay Rs are turned on. This way, the closing relay Rs is turned ON contact 6s is connected to the ON terminal 8s, the power supply 1 → in leakage state interlock switch S ₁ → first line L ₁ → ON terminal 8s → contact 6s → third line L ₃ → in leakage state interlock switch S ₃ → second line L ₂ → a current flows in a path of ground 2, the resistance of the two interlocking switches S _1, S ₃ in the leakage state is very high, in fact Includes a low resistance circuit via the seventh line L _7, that is, the power source 1 → the contact 10 and the terminal b of the interlock switch S ₁ → the seventh line L ₇ → the terminal b and the contact 11 of the interlock switch S ₂ → the third line. L ₃ → second terminal 9 _{2 of} motor 9 → motor 9 → first terminal 9 ₁ of motor 9 → contact 12 and terminal b of interlock switch S ₃ → second line L ₂ → current flows through the path of ground 2, Motor 9 is driven in the window opening direction The power window is opened.
[0020]
As described above, according to the power window drive circuit of the reference example , even if the circuit wets due to water immersion or dew condensation, the power window can be reliably operated by operating the operation switch S to the open position (1). It can be opened.
[0021]
4 to 6 show an embodiment of the present invention, FIG. 4 is a diagram showing a drive circuit for a power window, FIG. 5 is a diagram for explaining the operation when the window is opened, and FIG. 6 is a diagram for explaining the operation when the window is closed. FIG. In addition, in an Example, the overlapping description is abbreviate | omitted by attaching | subjecting the same code | symbol to the component corresponding to the component of a reference example.
[0022]
The drive circuit for the power window of the embodiment is for opening and closing the power window provided adjacent to the seat with the operation switch S provided in a seat other than the driver's seat. Since the operation switch S provided in a seat other than the driver's seat does not have the open auto function and the closed auto function described above, there are three types of operation positions: a neutral position, an open position, and a closed position.
[0023]
4 and 7, the drive circuit of the embodiment shown in FIG. 4 has two drive circuits that operate mechanically in conjunction with the operation switch S in the conventional drive circuit shown in FIG. Interlocking switches S ₄ and S ₅ are added. One interlocking switch S ₄ is provided between the third line L ₃ and the second line L ₂ on the first terminal 9 ₁ side of the motor 9, and the other interlocking switch S ₅ is the second terminal 9 ₂ of the motor 9. It is provided between the third line L ₃ and the second line L ₂ on the side. Contact 13 of the interlock switch S _4, the operation switch S is connected to the terminal a when in the neutral position or the closed position (2), operation switch S is connected to the terminal b when in the open position (1). Contacts 14 of interlock switch S ₅ is also operated switch S is connected to a terminal c when in the neutral position or the open position (1), operation switch S is connected to the terminal d when in the closed position (2) .
[0024]
The interlock switch S ₄ constitutes a first interlock switch of the present invention, the interlocking switch S ₅ constitute a second interlock switch of the present invention.
[0025]
Next, the operation of the embodiment of the present invention having the above-described configuration will be described.
[0026]
As shown in FIG. 5, when the operation switch S is operated to the open position (1), the coil 5o of the opening relay Ro is excited and the contact 6o is connected to the ON terminal 8o and interlocked with the operation of the operation switch S. contact 13 of the switch S ₄ is connected to the terminal b, and the contact 14 of the interlock switch S ₅ is connected to the terminal c. As a result, the power source 1 → the first line L ₁ → the ON terminal 8o and the contact 6o of the opening relay Ro → the third line L ₃ → the terminal c and the contact 14 of the interlock switch S ₅ → the third line L ₃ → the motor 9 The circuit of the second terminal 9 ₂ → the motor 9 → the first terminal 9 ₁ → the third line L ₃ → the contact 13 and the terminal b → the second line L ₂ → the ground 2 of the interlock switch S ₄ is configured. Is driven in the window opening direction to open the power window.
[0027]
Now, let us consider a case where the operation switch S is operated to the open position (1) in a state where the drive circuit is wet by water immersion or condensation. In FIG. 5, when a leak current flows through the wet operation switch S as indicated by a broken line arrow, the coil 5 s of the closing relay Rs is excited and the contact 6 s is switched from the solid line position to the broken line position. However, since the contact 13 of the interlock switch S ₄ at this time is away from the terminal a, without first terminal 9 ₁ side of the motor 9 becomes a high potential, trouble driving in the window opening direction of the motor 9 without line Is called. Although even a leakage current flows between the terminal a and the terminal b of the interlocking switch S _4, will not be reaching influence on the driving of the motor 9 for the resistance value at this time is very high.
[0028]
As shown in FIG. 6, when the operation switch S is operated to the closed position (2), the coil 5s of the closing relay Rs is excited and the contact 6s is connected to the ON terminal 8s, and interlocked with the operation of the operation switch S. contact 13 of the switch S ₄ is connected to the terminal a, and contacts 14 of interlock switch S ₅ is connected to the terminal d. As a result, the power source 1 → the first line L ₁ → the ON terminal 8s and the contact 6s of the closing relay Rs → the third line L ₃ → the terminal a and the contact 13 of the interlock switch S ₄ → the third line L ₃ → the motor 9 The circuit of the first terminal 9 ₁ → the motor 9 → the second terminal 9 ₂ → the third line L ₃ → the contact 14 of the interlock switch S ₅ and the terminal d → the second line L ₂ → the ground 2 is configured. Is driven in the window closing direction to close the power window.
[0029]
Consider a case where the operation switch S is operated to the closed position (2) in a state where the drive circuit is wetted by water immersion or condensation. In FIG. 6, when a leak current flows through the wet operation switch S as indicated by a broken line arrow, the coil 5o of the opening relay Ro is excited and the contact 6o is switched from the solid line position to the broken line position. However, since the contact 14 of the interlock switch S ₅ at this time is away from the terminal c, the second terminal 9 ₂ side without becoming a high potential, the window line drive without any trouble in the closing direction of the motor 9 of the motor 9 Is called. Although even a leakage current flows between the terminals c and the terminal d of the interlock switch S _5, will not span affect the drive of the motor 9 for the resistance value at this time is very high.
[0030]
As described above, according to the power window drive circuit of the embodiment , the operation switch S can be operated to the open position (1) or the closed position (2) even if the circuit becomes wet due to water immersion or condensation. Thus, it is possible to open and close the power window.
[0031]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary.
[0032]
For example, the invention of the embodiment can be applied to a drive circuit that is operated by an operation switch S in the driver's seat.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the operation switch gets wet due to water immersion or dew condensation, the insulation resistance decreases, and both the opening relay coil and the closing relay coil are excited, and both ends of the motor are excited. Both children become high potential and the power window cannot be opened or closed. However, when the operation switch is operated in the opening direction, the first interlocking switch that operates in conjunction with the operation in the opening direction of the operation switch opens the circuit between the motor and the closing relay, so that the closing relay is closed. Regardless, one terminal of the motor is kept at a low potential, and the high voltage of the power source is applied to the other terminal of the motor by the second interlocking switch that operates in conjunction with the operation in the opening direction of the operation switch. The motor can be driven in the opening direction.
[Brief description of the drawings]
[1] the driving of a power window according to FIG. FIG. 2 [4 Figure] operation explanatory view [FIG 3] operation explanatory diagram during flooding condensation during normal embodiment showing a driving circuit for driving a power window according to a reference example FIG. 5 is a diagram illustrating an operation when a window is opened. FIG. 6 is a diagram illustrating an operation when a window is closed. FIG. 7 is a diagram illustrating a conventional drive circuit for a power window. Figure [Explanation of symbols]
1 Power 5o coil 5s relay Rs closing relay S operation switch S ₄ interlock switch for opening coil 9 motor 9 ₁ one terminal 9 ₂ other terminal Ro (first interlock switches)
S ₅ interlock switch (the second interlock switch)

Claims (1)

In the drive circuit of the power window for driving the motor (9) for opening and closing the power window,
An opening relay (Ro) for connecting the motor (9) to the power source (1) to drive the motor (9) in the window opening direction;
A closing relay (Rs) for connecting the motor (9) to the power source (1) to drive the motor (9) in the window closing direction;
The coil (5o) of the opening relay (Ro) is connected to the power source (1) by the operation in the window opening direction, and the coil (5s) of the closing relay (Rs) is powered by the operation in the window closing direction. An operation switch (S) connected to (1);
A first interlock switch (S ₄ ) that operates in conjunction with the operation of the operation switch (S) in the window opening direction and opens a circuit between _one terminal (9 ₁ ) of the motor (9) and the closing relay (Rs). )When,
A second interlocking switch that operates in conjunction with the operation of the operation switch (S) in the window opening direction and connects the other terminal (9 ₂ ) of the motor (9) to the power source (1) to drive in the window opening direction. (S ₅ )
A drive circuit for a power window, comprising:

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