JP2018101515A - Switch operating device and power window control device - Google Patents

Abstract

A switch operation device (1) capable of preventing erroneous detection of a signal level in the event of water wetting or the like is provided. A switch operating device (1) includes an output section (P2) for outputting a switch signal, five electric lines (EP1 to EP5) connected to the output section (P2) and selectively energized, and a switch operating device (1) which is electrically connected to the switch operating device (1) when it is submerged in water. and a submersion time control circuit 12 that operates to lower the resistance of the electric line EP2 as the electric line to be controlled. The electric circuit EP2 includes a switch S2 and a resistor R1 connected in series and becomes an electric circuit EP2S when submerged. [Selection drawing] Fig. 1F

Description

  The present invention relates to a switch operation device that outputs a switch signal corresponding to a switch when the switch is operated, and a power window control device using the switch operation device.

  Conventionally, a circuit that can output four kinds of output voltages using two switch elements is known (see Patent Document 1). In this circuit, the voltage level difference between the four output voltages is made equal by increasing the voltage level difference between the four output voltages. And the erroneous detection of the voltage level by the microcomputer which operates by detecting the voltage level is prevented.

Registered Utility Model No. 3182794

  However, in the above-described circuit, when a leakage current occurs due to water wetting, submersion, water immersion (hereinafter referred to as “water wetting”), the output voltage becomes unstable due to the influence of the leakage current. As a result, the microcomputer may erroneously detect the voltage level.

  In view of the above points, it is desirable to provide a switch operating device that can prevent erroneous detection of a signal level when water wets or the like occurs.

  A switch operating device according to an embodiment of the present invention includes an output unit that outputs a switch signal, and a plurality of electrical paths that are connected to the output unit and that are alternatively energized, and are connected in series to a resistor and resistor And a submergence control circuit that operates when submerged and reduces the resistance of the control target electric circuit.

  With the above-described means, it is possible to provide a switch operating device that can prevent erroneous detection of a signal level when water wets or the like occurs.

It is the schematic which shows the structural example of a power window control apparatus. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows transition of the output voltage of a switch operating device. It is a flowchart which shows the flow of the process which a motor control part performs. It is a flowchart which shows the flow of another process which a motor control part performs. It is the schematic which shows the structural example of a power window control apparatus. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is the schematic which shows another structural example of a power window control apparatus. It is a figure which shows the specific state of the power window control apparatus of FIG. It is a figure which shows the specific state of the power window control apparatus of FIG. It is the schematic which shows another structural example of a power window control apparatus. It is the schematic which shows another structural example of a power window control apparatus.

  FIG. 1 is a schematic diagram illustrating a configuration example of a power window control apparatus 100 according to an embodiment of the present invention. The power window control device 100 is provided inside the door of the vehicle and mainly includes the switch operation device 1 and the motor control device 2.

  The switch operating device 1 is a device that outputs a switch signal corresponding to a switch when the switch is operated. The switch signal is, for example, a voltage signal. It may be a current signal. The switch operating device 1 mainly includes a signal circuit 10, a submergence detection circuit 11, and a submergence control circuit 12.

  The signal circuit 10 is a circuit that generates a multi-level switch signal. In the example of FIG. 1, the signal circuit 10 includes an input part P1, an output part P2, switches S1 to S4, and resistors R1 to R4. The signal circuit 10 generates a plurality of voltage levels as a switch signal having a plurality of levels. In the example of FIG. 1, the signal circuit 10 constitutes a voltage dividing circuit together with the resistor R <b> 5 provided in the motor control device 2.

  The input part P1 is a part where a predetermined reference signal enters the switch operating device 1. In the example of FIG. 1, it is one point on the electric circuit to which the power supply voltage is applied. It may be a point on the electric circuit to which the ground voltage is applied.

  The output unit P2 is a part where a switch signal used by another device is output from the switch operating device 1. In the example of FIG. 1, it is one point on the electric circuit to which the output voltage is applied.

  The signal circuit 10 includes a plurality of electric circuits that are alternatively energized to the output unit P2. The plurality of electric circuits include a control target electric circuit including a switch and a resistor connected in series. The control target electric circuit is an electric circuit to be controlled by the submersion control circuit 12 when the switch operating device 1 is wet. In the example of FIG. 1, the signal circuit 10 has five electric circuits EP1 to EP2. The input part P1 and the output part P2 are alternatively connected by one of the five electric circuits EP1 to EP2.

  The first electric circuit EP1 is energized when the switch S1 is closed. FIG. 1A shows the current flowing through the first electric circuit EP1 with a dotted arrow. The current flows through the switch S1 to the output part P2 without passing through the resistor.

  The second electric circuit EP2 is energized when the switch S1 is open and the switch S2 is closed. FIG. 1B shows the current flowing through the second electric circuit EP2 with a dotted arrow. Current flows through resistor R1 and switch S2 to output P2.

  The third electric circuit EP3 is energized when each of the switches S1 and S2 is open and the switch S3 is closed. FIG. 1C shows a current flowing through the third electric circuit EP3 by a dotted arrow. Current flows through resistors R1, R2 and switch S3 to output P2.

  The fourth electric circuit EP4 is energized when each of the switches S1 to S3 is open and the switch S4 is closed. FIG. 1D shows the current flowing through the fourth electric path EP4 with a dotted arrow. The current flows through the resistors R1 to R3 and the switch S4 to the output part P2.

  The fifth electric circuit EP5 is energized when all of the four switches S1 to S4 are open. FIG. 1E shows the current flowing through the fifth electric circuit EP5 with a dotted arrow. The current flows through the resistors R1 to R4 to the output part P2.

  The submergence detection circuit 11 is activated when the switch operating device 1 is wet. In the example of FIG. 1, the submergence detection circuit 11 connects the power source (the power source 20 mounted on the motor control device 2) and the submergence control circuit 12 to operate the submergence control circuit 12. The power source may be a power source mounted on the switch operating device 1 or an external power source.

  The submergence control circuit 12 operates when the switch operating device 1 is wet. In the example of FIG. 1, when connected to a power source by the submergence detection circuit 11, an electrical component such as a relay is operated. Then, the resistance of one or more control target electric circuits in the signal circuit 10 is lowered. In addition, the submergence control circuit 12 blocks one or more other control target electric circuits in the signal circuit 10.

  Specifically, the submergence control circuit 12 includes a normally open relay that is connected in parallel to the resistor R1 in the second electric circuit EP2 that is the electric circuit to be controlled. Close open relay and bypass resistor R1. That is, an electric circuit that bypasses the resistor R1 in the second electric circuit EP2 is opened, and a new electric circuit (second electric circuit EP2S when submerged) is energized. FIG. 1F shows the current flowing through the second electric circuit EP2S when submerged by a dotted arrow.

  In addition, the submergence control circuit 12 includes a normally closed relay provided in the third electric circuit EP3 that is the electric circuit to be controlled. The submergence control circuit 12 opens the normally closed relay when the switch operating device 1 is wet, etc., and interrupts the third electric circuit EP3. For example, the submergence control circuit 12 blocks the third electric circuit EP3 between the resistor R1 and the resistor R2.

  The relay includes a contact relay and a contactless relay. The contact relay includes an electromagnetic relay. The contactless relay includes a solid-state relay using a semiconductor switching element such as a thyristor, a triac, a diode, or a transistor.

  The motor control device 2 mainly includes a power supply 20, a regulator 21, an output unit P3, an input unit P4, and a motor control unit 22.

  The power supply 20 supplies power to the switch operating device 1. In the example of FIG. 1, it is storage batteries, such as a vehicle-mounted battery. In the example of FIG. 1, the power supply 20 outputs a power supply voltage Vcc.

  The regulator 21 is a device that generates a constant output voltage of a predetermined level regardless of changes in input voltage or load conditions. In the example of FIG. 1, the regulator 21 can maintain the output voltage at a predetermined level regardless of the change in the output current caused by the leakage current that occurs when the switch operating device 1 is wet. Hereinafter, for convenience, the voltage output from the regulator 21 is referred to as a power supply voltage Vcc. The regulator 21 may include an overcurrent (ground fault current) protection circuit. Further, the regulator 21 may be omitted.

  The output unit P3 is a part where a predetermined reference signal used by another device is output from the motor control device 2. In the example of FIG. 1, it is one point on the electric circuit to which the voltage after being adjusted by the regulator 21 is applied. It may be a point on the electric circuit to which the power supply voltage Vcc is applied.

  The input unit P4 is a part where a signal output from another device enters the motor control device 2. In the example of FIG. 1, it is one point on the electric circuit where the output voltage of the switch operating device 1 is applied.

  In the example of FIG. 1, the input part P1 of the switch operating device 1 and the output part P3 of the motor control device 2 are connected by a signal line SL1. Moreover, the output part P2 of the switch operating device 1 and the input part P4 of the motor control device 2 are connected by a signal line SL2. The signal line SL1 and the signal line SL2 are accommodated in one cable CB.

  The motor control unit 22 is a device that controls an electric motor for moving the window up and down. In the example of FIG. 1, the motor control unit 22 is a microcomputer including a CPU, a RAM, a ROM, and the like. The motor control unit 22 controls the electric motor according to the signal level at the input unit P4, that is, the signal level of the switch signal output from the switch operating device 1.

  Specifically, the motor control unit 22 controls the electric motor according to the voltage level at the input unit P4, that is, according to each of the five levels of voltage levels output from the switch operating device 1.

  The five voltage levels are the resistance value of the resistor R5 provided in the motor control device 2, and the resistance of the resistor included in one electric circuit selected from the five electric circuits EP1 to EP5 in the switch operating device 1. It is determined by the ratio with the value. That is, the resistor R5 and the resistor included in one electric circuit selected from the five electric circuits EP1 to EP5 form a voltage dividing circuit.

  The first voltage level V1 is determined by the ratio between the resistance value r5 of the resistor R5 and the resistance value of the resistor included in the first electric circuit EP1. As shown in FIG. 1A, the first electric circuit EP1 is an electric circuit that is energized when the switch S1 is operated, that is, when the switch S1 is closed. Since the first electric circuit EP1 does not include a resistor, the first voltage level V1 is equal to the voltage (for example, the power supply voltage Vcc) at the input unit P1 of the switch operating device 1. When the voltage of the first voltage level V1 is applied to the input unit P4, the motor control unit 22 continuously rotates and drives the electric motor in the direction in which the window is lowered until the window is completely lowered. Hereinafter, this operation is referred to as “auto-down operation”. In this case, the switch S1 functions as an auto down switch. Even if the operation of the switch S1 is stopped, the motor control unit 22 continuously drives the electric motor to rotate until the window is completely lowered.

  The second voltage level V2 is determined by the ratio between the resistance value r5 of the resistor R5 and the resistance value of the resistor included in the second electric circuit EP2. As shown in FIG. 1B, the second electric circuit EP2 is an electric circuit that is energized when the switch S2 is operated, that is, when the switch S2 is closed. The second electric circuit EP2 includes a resistor R1. Therefore, the second voltage level V2 is determined by the ratio between the resistance value r1 of the resistor R1 and the resistance value r5 of the resistor R5 (V2 / (Vcc−V2) = r5 / r1). While the voltage of the second voltage level V2 is applied to the input unit P4, that is, until the operation of the switch S2 is stopped, the motor control unit 22 rotates the electric motor in the direction in which the window is lowered. Hereinafter, this operation is referred to as “manual down operation”. In this case, the switch S2 functions as a manual down switch. When the operation of the switch S2 is stopped, the motor control unit 22 stops the electric motor.

  The third voltage level V3 is determined by the ratio between the resistance value r5 of the resistor R5 and the resistance value of the resistor included in the third electric circuit EP3. As shown in FIG. 1C, the third electric circuit EP3 is an electric circuit that is energized when the switch S3 is operated, that is, when the switch S3 is in the closed state. The third electric circuit EP3 includes resistors R1 and R2. Therefore, the third voltage level V3 is determined by the ratio of the total resistance value (r1 + r2) of the resistance values r1 and r2 of the resistors R1 and R2 and the resistance value r5 of the resistor R5 (V3 / (Vcc−V3) = r5. / (R1 + r2)). When the voltage of the third voltage level V3 is applied to the input unit P4, the motor control unit 22 continuously rotates and drives the electric motor in the direction in which the window is raised until the window is completely raised. Hereinafter, this operation is referred to as “auto-up operation”. In this case, the switch S3 functions as an auto up switch. Even when the operation of the switch S3 is stopped, the motor control unit 22 continuously drives the electric motor to rotate until the window is completely raised.

  The fourth voltage level V4 is determined by the ratio between the resistance value r5 of the resistor R5 and the resistance value of the resistor included in the fourth electric circuit EP4. As shown in FIG. 1D, the fourth electric circuit EP4 is an electric circuit that is energized when the switch S4 is operated, that is, when the switch S4 is in the closed state. The fourth electric path EP4 includes resistors R1 to R3. Therefore, the fourth voltage level V4 is determined by the ratio of the total resistance value (r1 + r2 + r3) of the resistance values r1 to r3 of the resistors R1 to R3 and the resistance value r5 of the resistor R5 (V4 / (Vcc−V4) = r5. / (R1 + r2 + r3)). While the voltage of the fourth voltage level V4 is applied to the input unit P4, that is, until the operation of the switch S4 is stopped, the motor control unit 22 rotationally drives the electric motor in the direction of raising the window. Hereinafter, this operation is referred to as “manual up operation”. In this case, the switch S4 functions as a manual up switch. When the operation of the switch S4 is stopped, the motor control unit 22 stops the electric motor.

  The fifth voltage level V5 is determined by the ratio between the resistance value r5 of the resistor R5 and the resistance value of the resistor included in the fifth electric circuit EP5. As shown in FIG. 1E, the fifth electric circuit EP5 is an electric circuit that is energized when none of the switches S1 to S4 is operated. The fifth electric circuit EP5 includes resistors R1 to R4. Therefore, the fifth voltage level V5 is determined by the ratio of the total resistance value (r1 + r2 + r3 + r4) of the resistance values r1 to r4 of the resistors R1 to R4 and the resistance value r5 of the resistor R5 (V5 / (Vcc−V5) = r5. / (R1 + r2 + r3 + r4)). When the voltage of the fifth voltage level V5 is applied to the input unit P4, the motor control unit 22 basically stops the electric motor. For example, when the auto-down operation or the auto-up operation is not executed, the electric motor is stopped.

  For example, the five voltage levels are equally allocated between the power supply voltage Vcc and the ground voltage. The resistance values of the resistors R1 to R5 are determined so that such an equal allocation is realized.

  Next, the voltage level at the input unit P4 when the switch is operated when the switch operating device 1 is submerged will be described.

  When the switch operating device 1 is submerged, the submergence detection circuit 11 connects the power source 20 and the submergence control circuit 12 to operate the submergence control circuit 12. The submergence control circuit 12 operates an electrical component such as a relay to lower the resistance of one or more control target electric circuits in the signal circuit 10. In addition, the submergence control circuit 12 blocks one or more other control target electric circuits in the signal circuit 10.

  In the example of FIG. 1, the voltage level when the switch S1 is operated when submerged is the same first voltage level V1 as when the switch S1 is operated when submerged. The electric circuit that is energized when the submergence control circuit 12 is operating is for the same first electric circuit EP1 as when the submergence control circuit 12 is not operating.

  The voltage level when the switch S2 is operated when submerged is higher than the voltage level when the switch S2 is operated when submerged. This is because the submergence control circuit 12 operates to lower the resistance of the second electric circuit EP2. Specifically, as shown in FIG. 1F, the submergence control circuit 12 opens the electric circuit bypassing the resistor R1 in the second electric circuit EP2 (see FIG. 1B) to energize the second electric circuit EP2S when submerged. . Since the second electric circuit EP2S at the time of submersion does not include a resistor, the voltage level is equal to the voltage at the input part P1 of the switch operating device 1 (for example, the power supply voltage Vcc). That is, the first voltage level V1 is the same as when the switch S1 is operated. When the voltage of the first voltage level V1 is applied to the input unit P4, the motor control unit 22 performs an auto-down operation. That is, the switch S2 functioning as a manual down switch functions as an auto down switch. Therefore, even if the operation of the switch S2 is stopped, the motor control unit 22 continuously rotates and drives the electric motor until the window is completely lowered.

  The voltage level when the switch S3 is closed when submerged is lower than the voltage level when the switch S3 is closed when not submerged. This is because the submergence control circuit 12 blocks the third electric circuit EP3. Specifically, the submergence control circuit 12 cuts off the electric circuit on the upstream side of the switch S3 (the side close to the power source 20). In the example of FIG. 1C, the third electric circuit EP3 is interrupted between the resistor R1 and the resistor R2. Therefore, the voltage level at the input part P4 is in an open state. As a result, the motor control unit 22 keeps the electric motor stopped even when the switch S3 is closed. The same applies when the switch S4 is closed.

  Next, the operation of the motor control unit 22 according to the level of the output voltage of the switch operating device 1 will be described with reference to FIGS. FIG. 2 is a diagram illustrating transition of the output voltage of the switch operating device 1 when each of the switches S1 to S4 is operated. Specifically, in FIG. 2, the switch S1 is operated from time t1 to time t2, the switch S2 is operated from time t3 to time t4, the switch S3 is operated from time t5 to time t6, and from time t7. The output voltage when the switch S4 is operated until time t8 is shown. FIG. 2A shows the output voltage when the switch operating device 1 is not submerged, and FIG. 2B shows the output voltage when the switch operating device 1 is submerged.

  FIG. 3 is a flowchart showing a flow of processing executed by the motor control unit 22. The motor control unit 22 repeatedly executes this process at a predetermined control period regardless of whether or not the switch operating device 1 is submerged.

  First, the motor control unit 22 determines whether or not the output voltage is equal to or higher than the threshold value TH1 (step ST1). The threshold value TH1 is a value smaller than the first voltage level V1 and larger than the second voltage level V2. For example, it is an intermediate value between the first voltage level V1 and the second voltage level V2.

  When it is determined that the output voltage is equal to or higher than the threshold TH1 (YES in step ST1), the motor control unit 22 performs an auto-down operation (step ST2). Specifically, the motor is operated when the switch S1 is operated when the switch operating device 1 is not submerged, and when the switch S1 or the switch S2 is operated when the switch operating device 1 is submerged. The control unit 22 determines that the output voltage is equal to or higher than the threshold value TH1, and executes the auto-down operation.

  When it is determined that the output voltage is less than the threshold value TH1 (NO in step ST1), the motor control unit 22 determines whether or not the output voltage is greater than or equal to the threshold value TH2 (step ST3). The threshold value TH2 is a value smaller than the second voltage level V2 and larger than the third voltage level V3. For example, it is an intermediate value between the second voltage level V2 and the third voltage level V3.

  When it is determined that the output voltage is equal to or higher than the threshold value TH2 (YES in step ST3), the motor control unit 22 performs a manual down operation (step ST4). Specifically, when the switch S2 is operated when the switch operating device 1 is not submerged, the motor control unit 22 determines that the output voltage is equal to or higher than the threshold value TH2, and performs a manual down operation.

  When it is determined that the output voltage is less than the threshold value TH2 (NO in step ST3), the motor control unit 22 determines whether the output voltage is equal to or higher than the threshold value TH3 (step ST5). The threshold value TH3 is a value smaller than the third voltage level V3 and larger than the fourth voltage level V4. For example, it is an intermediate value between the third voltage level V3 and the fourth voltage level V4.

  If it is determined that the output voltage is equal to or higher than the threshold TH3 (YES in step ST5), the motor control unit 22 performs an auto-up operation (step ST6). Specifically, when the switch operating device 1 is not submerged and the switch S3 is operated, the motor control unit 22 determines that the output voltage is equal to or higher than the threshold value TH3 and performs the auto-up operation.

  When it is determined that the output voltage is less than the threshold TH3 (NO in step ST5), the motor control unit 22 determines whether or not the output voltage is equal to or higher than the threshold TH4 (step ST7). The threshold value TH4 is a value smaller than the fourth voltage level V4 and larger than the fifth voltage level V5. For example, it is an intermediate value between the fourth voltage level V4 and the fifth voltage level V5.

  When it is determined that the output voltage is equal to or higher than the threshold TH4 (YES in step ST7), the motor control unit 22 performs a manual up operation (step ST8). Specifically, when the switch operating device 1 is not submerged and the switch S4 is operated, the motor control unit 22 determines that the output voltage is equal to or higher than the threshold value TH4 and executes the manual up operation.

  When it is determined that the output voltage is less than the threshold value TH4 (NO in step ST7), the motor control unit 22 appropriately controls the electric motor assuming that none of the switches S1 to S4 is operated. For example, when a manual down operation or a manual up operation is being executed, the electric motor is stopped. When the electric motor is stopped, the state is maintained. If an auto-down operation or an auto-up operation is being performed, that state is maintained until each operation is completed.

  Even when the switch S3 or the switch S4 is closed when the switch operating device 1 is submerged, the output voltage is maintained in the open state. That is, it is maintained below the threshold value TH4. Therefore, as described above, the motor control unit 22 can appropriately control the electric motor assuming that none of the switches S1 to S4 is operated.

  With the configuration described above, the switch operating device 1 can prevent erroneous detection of the signal level by the motor control device 2 when water wetting or the like occurs. Specifically, the switch operating device 1 outputs when a switch for lowering a window when submerged (switch S1 or switch S2, hereinafter collectively referred to as “down switch”) is operated. Increase the voltage as much as possible. For example, the voltage is higher than the highest threshold TH1.

  Further, the switch operating device 1 outputs an output voltage when a switch for raising a window when submerged (the switch S3 or the switch S4, hereinafter collectively referred to as an “up switch”) is closed. Make it as small as possible. For example, the voltage is lower than the lowest threshold TH4.

  Therefore, for example, the switch operating device 1 can prevent a voltage having the same level as that when the up switch is operated from being erroneously output even though the down switch is operated. As a result, when the down switch is operated during submergence, the window can be reliably lowered.

  In addition, the switch operating device 1 can prevent a voltage having the same level as that when the up switch is operated from being erroneously output even though the up switch is not operated. As a result, it is possible to prevent the auto up operation or the manual up operation from being performed when the up switch is closed due to leakage current or the like regardless of the operation of the operator. For example, the leakage current is generated at the signal lines SL1 and SL2.

  In the above-described embodiment, when the switch operating device 1 is submerged and when none of the switches S1 to S4 are operated, the output voltage at the output unit P2 is at a very low level. This is because the fifth electric path EP5 is interrupted by the submergence control circuit 12. Therefore, the motor control unit 22 may determine whether or not the switch operating device 1 is submerged by monitoring the output voltage. Then, when it is determined that the switch operating device 1 is submerged, the motor control unit 22 may reduce the threshold value TH1 for determining whether or not the down switch has been operated. This is because it is possible to reliably recognize that the down switch has been operated even when the fluctuation of the output voltage due to the leakage current or the like is large.

  FIG. 4 is a flowchart showing a flow of processing in which the motor control unit 22 reduces the threshold value TH1 when the switch operating device 1 is submerged. The motor control unit 22 repeatedly executes this process at a predetermined control cycle until it is determined that the switch operating device 1 is submerged.

  First, the motor control unit 22 determines whether or not the output voltage is less than the threshold value TH5 (step ST11). The threshold value TH5 is a value smaller than the fifth voltage level V5 and larger than the ground level (0V). For example, it is an intermediate value between the fifth voltage level V5 and the ground level.

  When it is determined that the output voltage is less than the threshold value TH5 (YES in step ST11), the motor control unit 22 sets the threshold value TH1 to the threshold value TH5 (step ST12).

  When it is determined that the output voltage is equal to or higher than the threshold value TH5 (NO in step ST11), the motor control unit 22 ends the current process without setting the threshold value TH1 to the threshold value TH5.

  With this process, the motor control unit 22 erroneously performs auto-up operation even if the output voltage when the switch S2 (manual down switch) is operated due to the influence of leakage current or the like becomes smaller than the threshold value TH2. The manual down operation can be executed without executing.

  Next, a configuration example of the submergence detection circuit 11 and the submergence control circuit 12 will be described with reference to FIG. FIG. 5 is a schematic diagram illustrating a configuration example of the power window control apparatus 100, and corresponds to FIG. FIG. 5 is different from FIG. 1 in that details of the submergence detection circuit 11 and the submergence control circuit 12 are shown, but is otherwise common to FIG. Therefore, the description of the common part is omitted, and the different part is described in detail. 5A and 5B show a specific state of the power window control device 100 shown in FIG. Specifically, FIG. 5A shows a state when the switch S2 is operated when the switch operating device 1 is submerged. FIG. 5B shows a state when the switch S3 is closed when the switch operating device 1 is submerged.

  In the example of FIG. 5, the submergence detection circuit 11 includes a water leak detection pad 110 and a relay 111. The water leak detection pad 110 is configured to energize between a pair of pads when a conductive liquid adheres between the pair of pads. The relay 111 is a normally open relay that is closed when a current is passed between a pair of pads in the water leak detection pad 110. In the example of FIG. 5, it is composed of a PNP transistor.

  In the example of FIG. 5, the submergence control circuit 12 includes a relay 120 and a relay 121. The relay 120 is a normally open relay that is closed when the switch operating device 1 is submerged. The relay 121 is a normally closed relay that is opened when the switch operating device 1 is submerged. In the example of FIG. 5, both the relays 120 and 121 are electromagnetic relays.

  When the switch operating device 1 is submerged and the pair of pads in the water leak detection pad 110 are energized, the relay 111 is closed. Specifically, the base voltage of the PNP transistor decreases, and a current flows from the emitter to the collector. As a result, current flows from the power source 20 through the submergence detection circuit 11 to the submergence control circuit 12 as indicated by the dotted arrows in FIG. 5A.

  When a current flows from the power source 20 to the relay 120, the relay 120 is closed. That is, an electric circuit that bypasses the resistor R1 is opened.

  Therefore, when the switch S2 is operated when the switch operating device 1 is submerged, the current passes through the relay 120 and the switch S2, not through the resistor R1, as indicated by the dotted arrow in FIG. 5A. Flowing. Therefore, the voltage level at the input unit P4 is the first voltage level V1. As a result, the motor control unit 22 can execute an auto-down operation.

  Further, when a current flows from the power supply 20 to the relay 121, the relay 121 is opened. That is, the electric circuit is interrupted between the resistor R1 and the resistor R2.

  Therefore, even if the switch S3 is closed when the switch operating device 1 is submerged, the current flows toward the submergence detection circuit 11 and the submergence control circuit 12 as shown by the dotted arrows in FIG. 5B. It only flows, not toward the switch S3. Therefore, the voltage level at the input part P4 is in an open state. As a result, the motor control unit 22 does not raise the window even if the switch S3 is closed. The same applies when the switch S4 is closed.

  Next, another configuration example of the submergence control circuit 12 will be described with reference to FIG. FIG. 6 is a schematic diagram illustrating another configuration example of the power window control apparatus 100, and corresponds to FIG. FIG. 6 is different from FIG. 1 in that the details of the submergence detection circuit 11 and the submergence control circuit 12 are shown, but the other points are common to FIG. Moreover, the submergence detection circuit 11 of FIG. 6 is the same as the submergence detection circuit 11 of FIG. Therefore, the description of the parts already described is omitted, and the parts specific to the configuration of FIG. 6 are described in detail. 6A and 6B show a specific state of the power window control device 100 shown in FIG. Specifically, FIG. 6A shows a state when the switch S2 is operated when the switch operating device 1 is submerged. FIG. 6B shows a state when the switch S3 is closed when the switch operating device 1 is submerged.

  In the example of FIG. 6, the submergence control circuit 12 includes relays 122, 123, and 124. The relay 122 is a normally open relay that is closed when the switch operating device 1 is submerged. The relay 123 is a normally open relay that is closed when the switch operating device 1 is submerged. The relay 124 is a normally closed relay that is opened when the switch operating device 1 is submerged. In the example of FIG. 6, both the relays 122 and 124 are configured by P-type MOSFETs, and the relay 123 is configured by an NPN-type transistor.

  When the switch operating device 1 is submerged, the relay 123 is closed. Specifically, the base voltage of the NPN transistor increases, and a current flows from the emitter to the collector. When the relay 123 is closed, the relay 122 is closed. That is, an electric circuit that bypasses the resistor R1 is opened. Specifically, the gate voltage of the P-type MOSFET decreases, and a current flows from the source to the drain.

  Therefore, when the switch S2 is operated when the switch operating device 1 is submerged, the current passes through the relay 122 and the switch S2 without passing through the resistor R1, as indicated by the dotted arrow in FIG. 6A. Flowing. Therefore, the voltage level at the input unit P4 is the first voltage level V1. As a result, the motor control unit 22 can execute an auto-down operation.

  Further, when the switch operating device 1 is submerged, the relay 124 is opened. That is, the electric circuit is interrupted between the resistor R1 and the resistor R2. Specifically, the gate voltage of the P-type MOSFET increases, and no current flows from the source to the drain.

  Therefore, even if the switch S3 is closed when the switch operating device 1 is submerged, the current flows toward the submergence detection circuit 11 and the submergence control circuit 12 as shown by the dotted arrows in FIG. 6B. It only flows, not toward the switch S3. Therefore, the voltage level at the input part P4 is in an open state. As a result, the motor control unit 22 does not raise the window even if the switch S3 is closed. The same applies when the switch S4 is closed.

  Next, still another configuration example of the power window control device 100 will be described with reference to FIG. FIG. 7 is a schematic diagram illustrating still another configuration example of the power window control apparatus 100. The power window control device 100 of FIG. 7 is different from the power window control device 100 of FIG. 1 mainly in the internal configuration of the motor control device 2, but is common in other points. Therefore, the description of the common part is omitted, and the different part is described in detail.

  In FIG. 7, the switch operating device 1 has a port near the power source 20 as an output unit P2 and a side close to the ground as an input unit P1. The motor control device 2 uses the port near the power supply 20 as the input unit P4 and the side close to the ground as the output unit P3. Therefore, the voltage at the input P1 is equal to the ground voltage.

  In the motor control device 2, the resistor R5 is connected between the power source 20 and the input unit P4, and the motor control unit 22 is connected between the resistor R5 and the input unit P4.

  With this configuration, when the switch operating device 1 is not submerged, the switch operating device 1 provides an alternative five-stage voltage level by dividing the voltage. Specifically, the output voltage of the switch operating device 1 becomes maximum when none of the switches S1 to S4 is operated. When the switch S4 is operated, when the switch S3 is operated, when the switch S2 is operated, the output voltage decreases in the order, and when the switch S1 is operated, the output voltage becomes minimum.

  When the switch operating device 1 is submerged, the switch operating device 1 provides an alternative two-stage voltage level due to the partial pressure. Specifically, the output voltage of the switch operating device 1 is maximized when the switches S1 to S4 are all open, when the switch S3 is closed, and when the switch S4 is closed. This is because the submergence control circuit 12 cuts off the electric circuit between the resistor R1 and the resistor R2. And it becomes the minimum when the switch S1 is operated and when the switch S2 is operated. This is because the submergence control circuit 12 opens an electric circuit that bypasses the resistor R1.

  Next, still another configuration example of the power window control apparatus 100 will be described with reference to FIG. FIG. 8 is a schematic diagram showing still another configuration example of the power window control device 100. The power window control device 100 in FIG. 8 is different from the power window control device 100 in FIG. 7 mainly in the internal configuration of the switch operation device 1, but is common in other points. Therefore, the description of the common part is omitted, and the different part is described in detail.

  In FIG. 8, the switch operating device 1 includes a power supply 13 for operating the submergence detection circuit 11 and the submergence control circuit 12. Further, resistors R11 to R14 connected in series to the switches S1 to S4 are provided. The resistor R15 provided in the motor control device 2 and each of the resistors R11 to R14 included in one electric circuit selected from five electric circuits form a voltage dividing circuit.

  When the switch operating device 1 is not submerged, the switch operating device 1 provides an alternative five-stage voltage level due to the partial pressure. Specifically, the output voltage of the switch operating device 1 is maximized when the switches S1 to S4 are all open. When the switch S4 is closed, the switch S3 is closed, the switch S2 is closed, and the switch S1 is closed, the resistors R11 to R15 are set so that the output voltage decreases in this order. The resistance value is determined.

  When the switch operating device 1 is submerged, the switch operating device 1 provides an alternative two-stage voltage level due to the partial pressure. Specifically, the output voltage of the switch operating device 1 becomes maximum when the switches S1 to S4 are all open, when the switch S3 is closed, and when the switch S4 is closed. This is because the submergence control circuit 12 cuts off the electric circuit between the input unit P1 and each of the switches S3 and S4. The minimum value is obtained when the switch S1 is closed and when the switch S2 is closed. This is because the submergence control circuit 12 opens an electric circuit that bypasses the resistors R11 and R12.

  As described above, the switch operating device 1 includes, for example, an output unit P2 that outputs a switch signal and a plurality of electric circuits EP1 to EP5 that are connected to the output unit P2 and are alternatively energized. The plurality of electric circuits EP1 to EP5 may partially overlap as described above, or may be completely independent. Several electric circuit EP1-EP5 contains electric circuit EP2 as a control object electric circuit containing switch S2 and resistor R1 connected in series. Further, the switch operating device 1 includes a submergence control circuit 12 that operates when the switch operating device 1 is submerged and reduces the resistance of the electric circuit EP2. With this configuration, the switch operating device 1 can prevent erroneous detection of the signal level by the motor control unit 22 when water wetting or the like occurs. For example, in the example of FIG. 1, the switch operating device 1 lowers the resistance of the electric circuit EP2, thereby reducing the output voltage at the output unit P2 when the switch S2 is in the closed state from the original second voltage level V2. It can be raised to one voltage level V1. That is, the output voltage when the down switch is operated can be made higher than the threshold value TH1. The down switch includes an auto down switch and a manual down switch. The threshold value TH1 is the higher threshold value of the two threshold values TH1 and TH2 for determining whether or not the down switch has been operated. Therefore, the output voltage when the down switch is operated can be kept away from the lower threshold value TH2 of the two threshold values, and the output voltage can be more reliably prevented from falling below the threshold value TH2. As a result, it is possible to prevent the motor control device 2 from erroneously detecting the signal level when the down switch is operated when the switch operating device 1 is wet. In this case, erroneous detection of the signal level by the motor control device 2 includes erroneous detection that the up switch has been operated and non-detection that the down switch has been operated.

  The motor control device 2 does not need to change the control content depending on whether or not the switch operating device 1 is submerged. Therefore, it is not necessary to detect whether the switch operating device 1 is submerged. However, the motor control device 2 may detect whether or not the switch operation device 1 is submerged. This is because erroneous detection of the signal level can be more reliably prevented by changing the threshold value for determining whether or not the down switch is operated depending on whether or not the switch operating device 1 is submerged.

  Further, the switch operating device 1 includes a submergence detection circuit 11 that operates when submerged and connects the power source and the submergence control circuit 12. The power source may be the power source 20 mounted on the motor control device 2, the power source 13 mounted on the switch operating device 1, or an external power source. With this configuration, the switch operating device 1 can reliably operate the submergence control circuit 12 when submerged.

  Further, the submergence control circuit 12 includes relays 120 and 122 connected in parallel to the resistor R1 in the electric circuit EP2 as the control target electric circuit, and closes the relays 120 and 122 when the switch operating device 1 is submerged. Bypass R1. The relays 120 and 122 may be contact relays or non-contact relays. With this configuration, the switch operating device 1 can reduce the resistance of the electric circuit EP2 when submerged.

  In addition, the power window control device 100 using the switch operation device 1 uses, for example, a switch signal output from the output unit P2 when the electric circuit EP2 as a control target electric circuit is energized as a signal for lowering the window. . With this configuration, the power window control device 100 can reliably lower the window when the switch S2 as the manual down switch is operated when the switch operation device 1 is submerged. That is, when the switch operating device 1 is submerged, it is possible to prevent a situation in which the window rises or does not move despite the manual down switch being operated.

  The plurality of electric paths EP1 to EP5 that are alternatively energized include two electric paths EP1 and EP2 having different resistances. The switch signal output from the output unit P2 when the electric circuit EP1 which is one of the two electric circuits is energized is an auto-down switch signal, and the electric circuit EP2 which is the other of the two electric circuits is energized. Sometimes the switch signal output by the output unit P2 is a manual down switch signal.

  Further, the power window control device 100 includes a motor control unit 22 that controls an electric motor for moving the window up and down. The motor control unit 22 is provided separately from the switch operating device 1 and is connected to the switch operating device 1 via the cable CB. For example, the motor control device 2 including the motor control unit 22 and the switch operation device 1 are configured as separate devices each having an individual casing, and are connected to each other via a cable CB. With this configuration, each of the switch operation device 1 and the motor control device 2 can be miniaturized. Moreover, the freedom degree of arrangement | positioning in the inside of a vehicle door is raised. Therefore, the switch operating device 1 and the motor control device 2 can be attached to positions separated from each other inside the vehicle door. However, the switch operation device 1 and the motor control unit 22 may be configured as one device having a common housing. Alternatively, the switch operation device 1 and the motor control device 2 including the motor control unit 22 may be configured as one device having a common housing.

  Further, the cable CB includes a signal line SL2 as an output line. The switch operating device 1 includes an auto down switch S1 for outputting an auto down switch signal to the signal line SL2, and a manual down switch S2 for outputting a manual down switch signal to the signal line SL2. When the submergence control circuit 12 is not in operation, the output value of the manual down switch signal is different from the output value of the auto down switch signal. For example, the level of the output voltage of the manual down switch signal (second voltage level V2) is lower than the level of the output voltage of the auto down switch signal (first voltage level V1). On the other hand, when the submergence control circuit 12 is activated, the output value of the manual down switch signal is equal to the output value of the auto down switch signal. For example, the output voltage level of the manual down switch signal is equal to the output voltage level of the auto down switch signal (first voltage level V1). With this configuration, when the switch operation device 1 is not submerged, the power window control device 100 operates the motor control unit 22 by distinguishing between when the switch S1 is operated and when the switch S2 is operated. be able to. For example, the auto down function can be executed when the switch S1 is operated, and the manual down function can be executed when the switch S2 is operated. On the other hand, when the switch operating device 1 is submerged, the motor control unit 22 can be operated without distinguishing between when the switch S1 is operated and when the switch S2 is operated. For example, the auto-down function can be executed even when either the switch S1 or the switch S2 is operated. The manual down function may be executed even when either the switch S1 or the switch S2 is operated. In the above example, the switch S1 is associated with the auto down switch, and the switch S2 is associated with the manual down switch. However, the switch S2 may be associated with the auto down switch, and the switch S1 may be associated with the manual down switch.

  The submergence control circuit 12 is activated when the switch operating device 1 is submerged, and interrupts the electric circuit EP3 as the electric circuit to be controlled. With this configuration, the switch operating device 1 can prevent erroneous detection of the signal level by the motor control unit 22 when water wetting or the like occurs. For example, in the example of FIG. 1, the switch operating device 1 cuts off the electric circuit EP3, so that the output voltage at the output unit P2 when the switch S3 is closed is lower than the original third voltage level V3. (Eg, ground voltage). That is, the output voltage when the up switch is closed can be made lower than the threshold value TH4. The up switch includes an auto up switch and a manual up switch. The threshold value TH4 is the lower threshold value of the two threshold values TH3 and TH4 for determining whether or not the up switch is closed. Therefore, the output voltage when the up switch is in the closed state can be kept away from the higher threshold value TH3 of the two threshold values TH3 and TH4, and the output voltage can be prevented more reliably from exceeding the threshold value TH3. As a result, when the switch operating device 1 is wetted with water or the like, the motor control device 2 erroneously detects the signal level when the up switch is unintentionally closed due to leakage current or the like. Can be prevented. In this case, erroneous detection of the signal level by the motor control device 2 includes erroneous detection that the up switch (particularly, the auto up switch) has been operated even though the up switch has not been operated. Further, it is possible to prohibit the window from rising even when the up switch is actually operated. This is to prevent the window from being raised when the vehicle is submerged.

  Further, the submergence control circuit 12 may include relays 121 and 124 provided on the electric circuit EP3 as a control target electric circuit, and may open the relays 121 and 124 when the switch operating device 1 is submerged. With this configuration, the switch operating device 1 can block the electric circuit EP3 when submerged.

  Further, the power window control device 100 using the switch operating device 1 uses, for example, the switch signal output from the output unit P2 when the electric circuit EP3 as the electric circuit to be controlled is energized as a signal for raising the window. . With this configuration, the power window control device 100 can prohibit the window from being raised even when the switch S3 as the auto up switch is closed when the switch operating device 1 is submerged. That is, when the switch operating device 1 is submerged, it is possible to prevent the window from rising even though the up switch is not operated. Further, when the switch operating device 1 is submerged, it is possible to prohibit the window from rising even when the up switch is intentionally operated.

  Further, the control target electric circuit to be interrupted includes two electric circuits EP3 and EP4 having different resistances. The switch signal output from the output unit P2 when the electric circuit EP3, which is one of the two electric circuits, is energized is an auto-up switch signal, and the electric circuit EP4, which is the other of the two electric circuits, is energized. Sometimes the switch signal output by the output unit P2 is a manual up switch signal.

  The switch operating device 1 includes an auto up switch S3 for outputting an auto up switch signal to a signal line SL2 as an output line, and a manual up switch S4 for outputting a manual up switch signal to the signal line SL2. Prepare. When the submergence control circuit 12 is not in operation, the output value of the auto up switch signal is different from the output value of the manual up switch signal. For example, the level of the output voltage of the auto up switch signal (third voltage level V3) is higher than the level of the output voltage of the manual up switch signal (fourth voltage level V4). On the other hand, when the submergence control circuit 12 is activated, the output value of the auto up switch signal is equal to the output value of the manual up switch signal. For example, the output voltages of the auto up switch signal and the manual up switch signal are both equal at a voltage level lower than the fourth voltage level V4 (eg, ground voltage). With this configuration, when the switch operation device 1 is not submerged, the power window control device 100 operates the motor control unit 22 by distinguishing between when the switch S3 is operated and when the switch S4 is operated. be able to. For example, the auto up function can be executed when the switch S3 is operated, and the manual up function can be executed when the switch S4 is operated. On the other hand, when the switch operating device 1 is submerged, the motor control unit 22 is not operated even when either the switch S3 or the switch S4 is closed. Therefore, it is possible to prevent the window from rising in any case where the up switch is unintentionally closed due to leakage current or the like, or when the up switch is operated. In the above example, the switch S3 is associated with the auto up switch, and the switch S4 is associated with the manual up switch. However, the switch S4 may be associated with the auto up switch, and the switch S3 may be associated with the manual up switch.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiment. Various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Switch operation apparatus 2 ... Motor control apparatus 10 ... Signal circuit 11 ... Submergence detection circuit 12 ... Submergence control circuit 20 ... Power supply 21 ... Regulator 22 ... Motor Control unit 100 ... Power window control device 110 ... Water leak detection pad 110 111 ... Relay 111 120-124 ... Relay CB ... Cable EP1 ... First electric circuit EP2 ... Second Electric circuit EP2S ... Second electric circuit when submerged EP3 ... Third electric circuit EP4 ... Fourth electric circuit EP5 ... Fifth electric circuit P1 ... Input part P2 ... Output part P3 ... Output part P4 ... Input section R1-R5 ... Resistors S1-S4 ... Switch SL1, SL2 ... Signal line

Claims (8)

An output unit for outputting a switch signal;
A plurality of electric circuits connected to the output unit and selectively energized, a plurality of electric circuits including a control target electric circuit including a switch and a resistor connected in series;
A submergence control circuit that operates when submerged to lower the resistance of the control target electric circuit, and
Switch operating device. Provided with a submergence detection circuit unit that operates when submerged and connects the power source and the submergence control circuit,
The switch operating device according to claim 1. The submergence control circuit includes a relay connected in parallel to the resistor in the electric circuit to be controlled, and closes the relay when the switch operating device is submerged to bypass the resistor.
The switch operating device according to claim 1 or 2. The relay includes a contact relay and a contactless relay,
The switch operation device according to claim 3. A power window control device using the switch operating device according to claim 1,
The switch signal output by the output unit when the control target electric circuit is energized is a signal for lowering the window,
Power window control device. The electric circuit includes two electric circuits having different resistances, and the switch signal output by the output unit when one of the two electric circuits is energized is an auto-down switch signal. The switch signal output by the output unit when the other is energized is a manual down switch signal.
The power window control device according to claim 5. A motor control unit for controlling an electric motor for moving the window up and down;
The motor control unit is provided separately from the switch operation device, and is connected to the switch operation device via a cable.
The power window control device according to claim 5 or 6. The cable comprises an output line;
The switch operating device includes an auto down switch for outputting an auto down switch signal to the output line, and a manual down switch for outputting a manual down switch signal to the output line,
When the submergence control circuit is not in operation, the output value of the auto down switch signal is different from the output value of the manual down switch signal.
The power window control device according to claim 7.

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