JP4747058B2 - Power window device - Google Patents

Description

  The present invention relates to a power window device that automatically opens and closes a window glass based on an electric driving force.

  In general, in a vehicle equipped with this type of power window device, when a switch group related to opening and closing of a window glass provided on a door is operated, a drive source such as a motor is driven in a manner corresponding to the switch operation. In addition, the window glass is automatically opened and closed based on the electric driving force.

  Patent Document 1 discloses a power window device characterized in operation when immersed in a solution in which a solute of an electrolyte is dissolved in a solvent such as water. Specifically, the device is immersed in the solution. In such a case, when a switch operation for opening the window glass is performed, a technique for reliably opening the window glass in accordance with the operation is disclosed.

Here, based on such disclosed technology, a conventional power window device will be described.
As shown in FIG. 3, in the power window device 100, when the switch group 10 is operated, the relay group 30 is controlled by the controller 20 in a manner corresponding to the switch operation, and the motor 60 is thereby driven to rotate. The window glass is automatically opened and closed based on the rotational driving force (electric driving force).

  The switch group 10 can perform UP operation in two stages as an operation for closing (raising, that is, raising) the window glass, and 2 as an operation for opening (lowering, that is, causing DOWN) the window glass. DOWN operation over the stages is possible.

  When the first-stage UP operation (manual UP operation) is performed, the UP switch 11 is closed alone. At this time, the controller 20 continues over a period during which the UP switch 11 is closed. Then, the transistor 21 is turned on.

  On the other hand, when the second stage UP operation (auto UP operation) is performed, both the UP switch 11 and the AUTO switch 13 are closed, and at this time, the controller 20 performs an operation for canceling the auto UP operation. The transistor 21 is turned on until the window glass reaches the fully closed position except in the case of breakage.

  Therefore, when these UP operations are performed, the coil 41 of the UP relay 40 is excited. That is, in these cases, the movable contact 42 of the UP relay 40 is switched from a state where it is electrically connected to the negative fixed contact 43 to a state where the movable contact 42 is electrically connected to the positive fixed contact 44. At this time, the movable contact 52 of the DOWN relay 50 is electrically connected to the negative fixed contact 53.

  As a result, current flows from the positive terminal of the battery to the negative terminal of the battery through the positive fixed contact 44, the movable contact 42, the motor 60, the movable contact 52, and the negative fixed contact 53, so that the motor 60 rotates in the forward direction. While being driven, the window glass is closed (raised, that is, UP).

  Further, when the first-stage DOWN operation (manual DOWN operation) is performed, the DOWN switch 12 is independently closed, and at this time, the controller 20 is in a period during which the DOWN switch 12 is closed. Then, the transistor 22 is turned on.

  On the other hand, when the second-stage DOWN operation (auto DOWN operation) is performed, both the DOWN switch 12 and the AUTO switch 13 are closed. At this time, the controller 20 performs an operation for canceling the auto DOWN operation. Except in the case where it is broken, the transistor 22 is turned on until the window glass reaches the fully open position.

  Therefore, when these DOWN operations are performed, the coil 51 of the DOWN relay 50 is excited. That is, in these cases, the movable contact 52 of the DOWN relay 50 is switched from the state in which the movable contact 52 is electrically connected to the minus side fixed contact 53 to the state in which the movable contact 52 is electrically connected to the plus side fixed contact 54. At this time, the movable contact 42 of the UP relay 40 is electrically connected to the negative fixed contact 43.

  As a result, a current flows from the positive terminal of the battery to the negative terminal of the battery through the positive fixed contact 54, the movable contact 52, the motor 60, the movable contact 42, and the negative fixed contact 43, whereby the motor 60 is driven in reverse. At the same time, the window glass is opened (lowered, that is, DOWN).

  When neither the UP operation nor the DOWN operation is performed, all of the UP switch 11, the DOWN switch 12, and the AUTO switch 13 are opened. At this time, the controller 20 performs the UP operation or the DOWN operation. The transistors 21 and 22 are both turned off until they are turned on.

  Accordingly, in this case, the coil 41 of the UP relay 40 and the coil 51 of the DOWN relay 50 are both demagnetized. That is, in this case, the movable contact 42 of the UP relay 40 is electrically connected to the negative fixed contact 43 and the movable contact 52 of the DOWN relay 50 is electrically connected to the negative fixed contact 53.

  As a result, both ends of the motor 60 are electrically connected to the negative terminal of the battery, and the potential difference between them is 0 V. Therefore, no current flows through the motor 60, so the window glass is both closed and opened. It is held without stopping (window stop operation).

  Here, in order to identify whether the power window device 100 is immersed in the solution or is not in such a state, in order to realize the opening and closing control of the window glass in a mode according to each of them, The apparatus 100 is provided with an immersion sensor 70 having two electrodes 71 and 72. That is, when the power window device 100 is immersed in the solution, the solution is interposed between the electrodes 71 and 72, and thus the electrodes 71 and 72 that are not electrically connected before the immersion are electrically connected via the solution. At this time, the controller 20 monitoring the potential of the electrode 72 recognizes that the apparatus 100 is immersed in the solution.

  When the controller 20 recognizes in this way, both the transistors 21 and 22 are turned on. Accordingly, in this case, the coil 41 of the UP relay 40 and the coil 51 of the DOWN relay 50 are both excited. That is, in this case, the movable contact 42 of the UP relay 40 is electrically connected to the plus side fixed contact 44, and the movable contact 52 of the DOWN relay 50 is electrically connected to the plus side fixed contact 54.

  As a result, both ends of the motor 60 are electrically connected to the positive terminal of the battery, and the potential difference between them is 0V (12-12 = 0 when the battery voltage is 12V). Does not flow, the window glass is held stopped without being closed or opened (window stop operation during immersion).

  On the other hand, when the controller 20 recognizes that the power window device 100 is immersed in the solution based on the potential level of the electrode 72, both the transistor 21 and the transistor 22 are continuously turned on, and the DOWN operation is performed. When this happens, the switch 81 provided between both ends of the coil 41 is closed. When the DOWN operation is not performed, the switch 81 is open.

  Therefore, when the power window device 100 is immersed in the solution and the DOWN operation is performed, the coil 51 of the DOWN relay 50 is excited and the coil 41 of the UP relay 40 is demagnetized. The reason why the coil 41 is demagnetized is that when the switch 81 is closed, both ends of the coil 41 are forcibly short-circuited, and the potential difference between both ends of the coil 41 thereby causes the coil 41 to be excited. This is because the voltage is lower than the voltage required to make it.

  That is, when the power window device 100 is immersed in the solution and the DOWN operation is performed, the movable contact 52 of the DOWN relay 50 is electrically connected to the plus side fixed contact 54 and the UP The movable contact 42 of the relay 40 is electrically connected to the negative fixed contact 43.

  As a result, a current flows from the positive terminal of the battery to the negative terminal of the battery through the positive fixed contact 54, the movable contact 52, the motor 60, the movable contact 42, and the negative fixed contact 43, whereby the motor 60 is driven in reverse. At the same time, the window glass is closed (lowering, that is, DOWN) (window closing operation during immersion).

At this time, a current flows from the positive terminal of the battery to the negative terminal of the battery via the switch 81, the electrical resistor 82, and the transistor 21, but the current is limited by the presence of the electrical resistor 82 here. Therefore, in such a current path, consideration is given to preventing so-called dead shorts.
Japanese Patent Laid-Open No. 11-71960

  Here, when the conventional power window device 100 is immersed in the solution, a leak resistance 91 is generated between the positive terminal of the battery and the node 90 (an intermediate position between the coil 41 and the electric resistance 82). Is assumed. Even when the power window device 100 is immersed in the solution and the leak resistance 91 is generated as described above, when the DOWN operation is not performed, the power window device 100 does not open the window glass without permission. It is desirable.

  However, in the conventional power window device 100, when the device 100 is immersed in a solution, there is a possibility that the window glass may open without permission even though the DOWN operation is not performed. The reason will be described below.

  That is, when the power window device 100 is immersed in the solution, the transistor 21 and the transistor 22 are turned on, and when the DOWN operation is not performed, the switch 81 is open. Therefore, when the leak resistance 91 is not present, the coil 41 is excited, and at this time, the coil 51 is also excited. Therefore, the motor 60 is not rotated, and the window glass is held stopped (= above). Window stop operation during immersion).

  On the other hand, when the leak resistor 91 exists, a leak current flows from the positive terminal of the battery to the node 90 via the leak resistor 91, and thus flows to the negative terminal of the battery via the electric resistor 82 and the transistor 21. The current increases.

  Here, the voltage of the node 90 is equal to the sum of the collector-emitter voltage of the transistor 21 and the voltage across the electric resistor 82, and the voltage after the subtraction obtained by subtracting the voltage after the addition from the battery voltage is the coil 41. To be applied. Therefore, when the leakage resistance 91 exists, the voltage across the electrical resistance 82 increases by the amount of increase in the current flowing through the electrical resistance 82 as described above, and the potential of the node 90 increases accordingly. The voltage after subtraction is low, and the low voltage after subtraction is applied to the coil 41.

  When the low voltage after such subtraction is lower than the voltage necessary to excite the coil 41, the coil 41 is demagnetized where it should originally be excited. Is excited, the motor 60 is rotated in the reverse direction, so that the window glass opens without permission.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a power window device capable of preventing the window glass from being arbitrarily opened.

  In order to achieve the above object, according to a first aspect of the present invention, when the first coil is excited and the second coil is demagnetized, the window glass is closed and the second coil is closed. When the first coil is excited and the first coil is demagnetized, the window glass is opened, and when the first coil and the second coil are both excited or demagnetized, the window glass is opened. The gist of the present invention is that the power window device in which the stopping operation is performed includes excitation compensation means for compensating the excitation state of the first coil when the first coil is in a state to be excited. Yes.

  According to this configuration, when the first coil is in a state to be excited, the excitation state of the first coil is compensated by the excitation compensation means. Therefore, when the second coil is demagnetized in the above situation, the window glass is closed, and when the second coil is excited in the situation, the window glass is stopped. Is called. That is, in any case, the opening operation of the window glass is not performed. Therefore, it is possible to prevent the window glass from being opened arbitrarily.

  According to a second aspect of the present invention, in the power window device according to the first aspect, when the first coil is provided between both ends of the first coil and the first coil is in a state to be demagnetized, First current bypass means for demagnetizing the first coil by bypassing the current flowing from the upstream side of the first coil toward the first coil so as to avoid the first coil; An electrical resistance for short circuit prevention provided on the downstream side of the first coil and preventing a short circuit of a current path including the first current bypass unit when the current is bypassed by the first current bypass unit. The excitation compensation means is provided between both ends of the electrical resistance for short circuit prevention, and when the first coil is in a state to be excited, And as its gist that the current flowing through the coil is a second current bypass means for bypassing to avoid the short-circuit prevention for electrical resistance.

  According to this configuration, when the first coil is in a state to be excited, the second current bypass means bypasses the current flowing through the first coil so as to avoid the short-circuit preventing electrical resistance. Is done. For this reason, in the said situation, it is avoided that the voltage applied to a 1st coil falls below the voltage required in order to excite a 1st coil. This is because the current is bypassed so as to avoid the electrical resistance for short-circuit prevention, so that the voltage across the electrical resistance for short-circuit prevention may be treated as 0. Therefore, according to the configuration, when the first coil is in a state to be excited, a voltage necessary to excite the first coil is applied to the first coil. Since the excitation state of the first coil can be compensated, it is possible to prevent the window glass from being opened arbitrarily.

  According to a third aspect of the present invention, in the power window device according to the second aspect, each of the first current bypass unit and the second current bypass unit bypasses itself when the switch is closed. Switching means for bypassing power current, and when the first coil is in a state to be demagnetized, the first current bypass is provided on condition that the second current bypass means is opened. The gist is that the means is closed.

  According to this configuration, when the first coil is in a state to be demagnetized, the first current bypass means is closed on the condition that the second current bypass means is open. In other words, when the above condition is established, first, the function of the electrical resistance for short circuit prevention is activated, and then the current flows through the current path including the first current bypass means. Can be prevented.

Since this invention is comprised as mentioned above, there exist the following effects.
ADVANTAGE OF THE INVENTION According to this invention, it can prevent that a window glass opens arbitrarily.

  Hereinafter, an embodiment in which the present invention is embodied in an automobile power window device will be described. The power window device 1 of the present embodiment shown in FIG. 1 is different from the conventional power window device 100 shown in FIG. 3 in that a switch 83 is provided between both ends of the electrical resistor 82. .

  In the present embodiment, when the controller 20 recognizes that the power window device 1 is immersed in the solution based on the potential level of the electrode 72, both the transistors 21 and 22 are turned ON, and the DOWN operation is performed. When not performed, the switch 81 is opened and the switch 83 is closed.

  In this embodiment, the controller 20 opens the switch 81 and closes the switch 83, and then closes the switch 83 after opening the switch 81. For this reason, according to the same configuration, when the switch 81 is in the previous stage and the switch 81 is closed, the current flowing through the switch 81 is limited by the electric resistance 82, and then the switch 81 is switched to the switch 81. When opened, the current flowing through the coil 41 flows to the electrical resistance 82, and then when the switch 83 is closed, the current flowing through the coil 41 avoids the electrical resistance 82. Bypassed. Therefore, it is preferable because the current path is not dead-shorted at any stage.

  Alternatively, instead of such a configuration, the switch 81 and the switch 83 are opened in any order, and in this case, the transistor 21 is provided on condition that the switch 81 is open and the switch 83 is closed. , 22 may be turned on.

  As described above, when both the transistors 21 and 22 are turned ON, the switch 81 is opened, and the switch 83 is closed, the coil 41 of the UP relay 40 and the coil of the DOWN relay 50 are turned on. 51 are excited together.

  Here, focusing on the current path including the coil 41 at this time, in this current path, a current flows from the positive terminal of the battery to the negative terminal of the battery via the coil 41, the switch 83, and the transistor 21. . That is, in this case, almost no current flows through the electrical resistor 82. In other words, the current flowing through the coil 41 is bypassed by the switch 83 so as to avoid the electrical resistance 82 when the coil 41 is in a state to be excited. For this reason, in the said situation, it is avoided that the voltage applied to the coil 41 falls below the voltage required for exciting the coil 41. This is because the current is bypassed so as to avoid the electric resistance 82, and the voltage across the electric resistance 82 can be handled as zero.

  That is, in the present embodiment, when the coil 41 is in a state to be excited, the current does not flow through the electrical resistor 82 but the current flows through the switch 83 so that the current of the electrical resistor 82 is reduced. The voltage at both ends is set to approximately 0, so that a voltage necessary for exciting the coil 41 is secured. In other words, the excitation state of the coil 41 is compensated when the situation is present.

  The voltage at the node 90 is equal to the collector-emitter voltage (= about 0.1 V) of the transistor 21, that is, it can be handled as the same as the GND level (= 0 V). Therefore, under the above situation, the voltage between the both ends of the coil 41 is a voltage obtained by subtracting the collector-emitter voltage (= about 0.1 V) of the transistor 21 from the battery voltage (= 12 V), that is, a voltage (approximately equal to the battery voltage = About 11.9V), in other words, a voltage sufficient to excite the coil 41 is applied. This is true not only when the leak resistor 91 is not present, but also when the leak resistor 91 is present and a leak current flows into the node 90 via the leak resistor 91.

  As a result, in this embodiment, when the power window device 1 is immersed in the solution and the DOWN operation is not performed, the coil 41 of the UP relay 40 and the coil 51 of the DOWN relay 50 are both excited. Since the motor 60 is suitably maintained as it is, the motor 60 is not rotated, so that the window glass is stopped. That is, at this time, the opening operation of the window glass is not performed.

  Next, when the controller 20 recognizes that the power window device 1 is immersed in the solution based on the potential level of the electrode 72, both the transistors 21 and 22 are turned on, and the DOWN operation is performed. At this time, the switch 83 is opened and the switch 81 is closed.

  In this embodiment, when the controller 20 opens the switch 83 and closes the switch 81, the controller 20 opens the switch 83 and then closes the switch 81. For this reason, according to the same configuration, when the switch 83 is in the previous stage and the switch 83 is closed, the current flowing through the coil 41 is bypassed so as to avoid the electric resistance 82, and then the switch When the switch 83 is opened, a current flowing through the coil 41 flows to the electric resistor 82. After that, when the switch 81 is closed, the current flowing through the switch 81 is changed to the electric resistor 82. Limited by. Therefore, it is preferable because the current path is not dead-shorted at any stage.

  Alternatively, instead of such a configuration, the switch 83 is opened and the switch 81 is closed in any order. In this case, the transistor 21 is provided on condition that the switch 83 is open and the switch 81 is closed. , 22 may be turned on.

  As described above, when the transistors 21 and 22 are both turned ON, the switch 83 is opened, and the switch 81 is closed, the coil 51 of the DOWN relay 50 is excited and the UP The coil 41 of the relay 40 is demagnetized. The reason why the coil 41 is demagnetized is as already described in the background art section.

  As a result, when the power window device 1 is immersed in the solution and the DOWN operation is performed, the motor 60 is driven in reverse and the window glass is closed (down, that is, DOWN). This is the same as the window closing operation at the time of immersion already described in the background art section.

  At this time, a current flows from the positive terminal of the battery to the negative terminal of the battery via the switch 81, the electrical resistor 82, and the transistor 21, but the current is limited by the presence of the electrical resistor 82 here. Therefore, in such a current path, consideration is given to preventing so-called dead shorts. This is also the same as the contents already described in the background art section.

  In the present embodiment, the coil 41 corresponds to a first coil, and the coil 51 corresponds to a second coil. The switch 81 is provided between both ends of the coil 41, and when the coil 41 is in a situation where it should be demagnetized, the current flowing from the upstream side of the coil 41 toward the coil 41 is avoided by the coil 41. This corresponds to the first current bypass means for demagnetizing the coil 41 by bypassing the coil 41. The electrical resistor 82 is provided on the downstream side of the coil 41 and corresponds to a short-circuit preventing electrical resistor that prevents a short circuit of the current path including the switch 81 when the current is bypassed by the switch 81.

  On the other hand, the switch 83 corresponds to excitation compensation means for compensating the excitation state of the coil 41 when the coil 41 is in a state to be excited. In addition, the switch 83 corresponds to a second current bypass means for bypassing the current flowing through the coil 41 so as to avoid the electric resistance 82 when the coil 41 is in an excited state. Finally, each of the switch 81 and the switch 83 corresponds to switching means for bypassing a current that should be bypassed when the switch is closed.

As described above, according to the present embodiment, the following operations and effects can be obtained.
(1) When the coil 41 is in a state to be excited, the switch 83 compensates the excitation state of the coil 41. For this reason, when the coil 51 is demagnetized under the above circumstances, the window glass is closed, and when the coil 51 is excited under the above circumstances, the window glass is stopped. That is, in any case, the opening operation of the window glass is not performed. Therefore, it is possible to prevent the window glass from being opened arbitrarily.

  (2) When the coil 41 is in an excited state, the current flowing through the coil 41 is bypassed by the switch 83 so as to avoid the electric resistance 82. For this reason, in the said situation, it is avoided that the voltage applied to the coil 41 falls below the voltage required for exciting the coil 41. This is because the current is bypassed so as to avoid the electric resistance 82, and the voltage across the electric resistance 82 can be handled as zero. Therefore, according to the configuration of the present embodiment, when the coil 41 is in a state to be excited, a voltage necessary for exciting the coil 41 is applied to the coil 41, and thus the coil 41 Since the excitation state can be compensated, the window glass can be prevented from being opened without permission.

  (3) When the coil 41 is in a state to be demagnetized, the switch 81 is closed on condition that the switch 83 is opened. That is, under the above-described situation, first, the function of the electric resistance 82 is activated, and then a current flows through the current path including the switch 81. Therefore, a short circuit of the current path can be prevented.

  (4) When the power window device 1 is immersed in the solution while the window glass is in the fully closed position, and the leak resistance 91 is thereby present, both the UP operation and the DOWN operation are performed. When not done, the window glass is held in the fully closed position. Therefore, when the power window device 1 is in such a situation, it is possible to prevent the window glass from being opened arbitrarily.

  (5) When the power window device 1 is immersed in the solution and the leak resistance 91 is thereby present, when the DOWN operation is performed, the window glass is opened. Therefore, when the power window device 1 is in such a situation, the window glass can be opened according to the DOWN operation.

In addition, the said embodiment can also be changed and actualized as follows.
Generally, the electrical components such as the UP relay 40, the switch 81, the electrical resistor 82, the switch 83, and the transistor 21 including the controller 20 are mounted on one printed circuit board, and they are routed around the pattern. Are electrically connected. Here, in such a power window device 1, when a land for the positive power supply terminal exists near the downstream of the coil 41 (node 90), a leak resistance 91 is generated between the land and the node 90. It becomes easy to do. However, according to the said embodiment, even when it is the routing of such a pattern, it can prevent that a window glass opens arbitrarily.

  The switch 81 and the switch 83 are not limited to those that are electrically controlled by the controller 20. That is, even if the DOWN switch 12 is mechanically linked with the DOWN operation, the switch 83 is opened first, and the switch 81 is closed later. Good.

  When the power window device 1 is immersed in the solution and the electrodes 71 and 72 are thereby electrically connected via the solution, the coil 41 of the UP relay 40 and the coil 51 of the DOWN relay 50 are connected to each other. The method of exciting both is not limited to the aspect of the embodiment. That is, the method of exciting both the coils 41 and 51 in the above case is not limited to the method in which the controller 20 turns on both the transistors 21 and 22. In other words, a configuration in which both the coils 41 and 51 are excited in the above case without depending on the control by the controller 20 may be adopted.

  However, in the case where the power window device 1 is not immersed in the solution and the electrodes 71 and 72 are not electrically connected, the UP operation / DOWN operation starts as in the above embodiment. It is assumed that the coils 41 and 51 are excited / demagnetized based on the transistors 20 and 22 being controlled by the controller 20.

  That is, as shown in FIG. 2, a switching means such as a transistor 23 is provided on the downstream side of the electrode 72, and when the electrodes 71 and 72 are electrically connected via a solution, the transistor 23 is turned on. Thus, the coils 41 and 51 may be excited together.

  Although described for reference, a first current bypass means such as a switch 81 is provided between both ends of the coil 51, and an electrical resistance for short circuit prevention such as an electrical resistance 82 is provided on the downstream side of the coil 51. A second current bypass means such as a switch 83 may be provided between both ends of the electrical resistor 82. If comprised in this way, it can prevent that a window glass closes arbitrarily.

Next, a technical idea that can be grasped from the above embodiment and another example will be described.
[1] When the first coil is excited and the second coil is demagnetized, the window glass is closed and the second coil is excited and the first coil is demagnetized. When the window glass is opened, when the first coil and the second coil are both excited or demagnetized, the window glass is stopped.
A power window device comprising excitation compensation means for compensating an excitation state of the second coil when the second coil is in a state to be excited.

  According to the configuration, when the second coil is in a state to be excited, the excitation state of the second coil is compensated by the excitation compensation means. Therefore, when the first coil is demagnetized under the above circumstances, the window glass is opened, and when the first coil is excited under the above circumstances, the window glass is stopped. Is called. That is, in any case, the window glass is not closed. Accordingly, it is possible to prevent the window glass from being closed arbitrarily.

[2] In the power window device according to the technical idea [1],
A current that is provided between both ends of the second coil and that flows from the upstream side of the second coil toward the second coil when the second coil is in a condition to be demagnetized. First current bypass means for demagnetizing the second coil by bypassing the second coil to avoid the second coil;
An electrical resistance for short circuit prevention provided on the downstream side of the second coil and for preventing a short circuit of a current path including the first current bypass unit when the current is bypassed by the first current bypass unit. And
The excitation compensation means is provided between both ends of the electrical resistance for short circuit prevention, and when the second coil is in a state to be excited, a current flowing through the second coil is A power window device characterized by being a second current bypass means for bypassing so as to avoid electrical resistance for short circuit prevention.

  According to this configuration, when the second coil is in a state to be excited, the second current bypass means bypasses the current flowing through the second coil so as to avoid the short-circuit preventing electrical resistance. Is done. For this reason, in the said situation, it is avoided that the voltage applied to a 2nd coil falls below the voltage required in order to excite a 2nd coil. This is because the current is bypassed so as to avoid the electrical resistance for short-circuit prevention, so that the voltage across the electrical resistance for short-circuit prevention may be treated as 0. Therefore, according to the configuration, when the second coil is in a state to be excited, a voltage necessary for exciting the second coil is applied to the second coil. Since the excitation state of the second coil can be compensated, it is possible to prevent the window glass from being closed arbitrarily.

[3] In the power window device described in the technical idea [2],
Each of the first current bypass means and the second current bypass means is switching means for bypassing a current to be bypassed when the switch is closed,
When the second coil is in a situation to be demagnetized, the first current bypass means is closed on the condition that the second current bypass means is open. Power window device.

  According to this configuration, when the second coil is in a situation to be demagnetized, the first current bypass means is closed on the condition that the second current bypass means is open. In other words, when the above condition is established, first, the function of the electrical resistance for short circuit prevention is activated, and then the current flows through the current path including the first current bypass means. Can be prevented.

The electric circuit diagram which shows the structure of the power window apparatus of this embodiment. The electric circuit diagram which shows the structure of the power window apparatus of other embodiment. The electric circuit diagram which shows the structure of the conventional power window apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Power window apparatus, 41 ... Coil (1st coil), 51 ... Coil (2nd coil), 81 ... Switch (1st current bypass means, switching means), 82 ... Electric resistance (Electricity for short circuit prevention) Resistance), 83... Switch (excitation compensation means, second current bypass means, switching means).

Claims (3)

When the first coil is excited and the second coil is demagnetized, the window glass is closed, and when the second coil is excited and the first coil is demagnetized, In the power window device in which the window glass is opened, and when the first coil and the second coil are both excited or demagnetized, the window glass is stopped.
A power window device comprising excitation compensation means for compensating an excitation state of the first coil when the first coil is in a state to be excited. The power window device according to claim 1, wherein
A current that is provided between both ends of the first coil and that flows from the upstream side of the first coil toward the first coil when the first coil is in a state to be demagnetized. First current bypass means for demagnetizing the first coil by bypassing the first coil to avoid the first coil;
An electrical resistance for short circuit prevention provided on the downstream side of the first coil and preventing a short circuit of a current path including the first current bypass unit when the current is bypassed by the first current bypass unit. And
The excitation compensation means is provided between both ends of the electrical resistance for short circuit prevention, and when the first coil is in a state to be excited, the current flowing through the first coil is A power window device characterized by being a second current bypass means for bypassing so as to avoid electrical resistance for short circuit prevention. In the power window device according to claim 2,
Each of the first current bypass means and the second current bypass means is switching means for bypassing a current to be bypassed when the switch is closed,
When the first coil is in a state to be demagnetized, the first current bypass means is closed on the condition that the second current bypass means is open. Power window device.

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