JP6900185B2 - Switch operation device and power window control device - Google Patents

Description

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

Conventionally, a circuit capable of outputting four kinds of output voltages by using two switch elements is known (see Patent Document 1). This circuit increases the voltage level difference between each of the four output voltages by equalizing the voltage level difference between them. Then, the erroneous detection of the voltage level by the microcomputer that operates by detecting the voltage level is prevented.

Registered Utility Model No. 3182794

However, in the above circuit, when a leakage current is generated due to water wetting, submersion, submersion, etc. (hereinafter referred to as "water wetting, etc."), the output voltage becomes unstable due to the influence of the leakage current. As a result, the microcomputer may falsely detect the voltage level.

In view of the above points, it is desired to provide a switch operation device capable of preventing erroneous detection of the signal level when water wetting or the like occurs.

Switch operating device according to an embodiment of the present invention includes an input section, a plurality of paths which are selectively energized to connect an output section for outputting a switching signal, and said input portion and said output portion, comprising a plurality of paths including the controlled object path containing series-connected switch and resistor, and a submergence-time control circuit connected to a predetermined potential the control object path operates upon submersion, the control target path Connects the input unit and the output unit .

By the above-mentioned means, it is possible to provide a switch operation device capable of preventing erroneous detection by setting the signal level to a predetermined potential when water wetting or the like occurs.

It is the schematic which shows the configuration example of the power window control device. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the transition of the output voltage of a switch operation device. It is a flowchart which shows the flow of the process which a motor control part executes. It is a flowchart which shows the flow of another process executed by a motor control part. It is the schematic which shows the configuration example of the power window control device. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is the schematic which shows another configuration example of the power window control device. It is a figure which shows the specific state of the power window control device of FIG. It is a figure which shows the specific state of the power window control device of FIG. It is the schematic which shows still another configuration example of the power window control device.

FIG. 1 is a schematic view showing a configuration example of the power window control device 100. 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 operation device 1 is a device that outputs a switch signal corresponding to the switch when the switch is operated. The switch signal is, for example, a voltage signal. It may be a current signal. The switch operation device 1 mainly includes a signal circuit 10, a submersion detection circuit 11, and a submersion control circuit 12.

The signal circuit 10 is a circuit that generates a plurality of levels of switch signals. In the example of FIG. 1, the signal circuit 10 is composed of an input unit P1, an output unit P2, switches S1 to S4, and resistors R1 to R4. The signal circuit 10 generates a plurality of voltage levels as a plurality of level switch signals. In the example of FIG. 1, the signal circuit 10 constitutes a voltage dividing circuit together with a resistor R5 provided in the motor control device 2.

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

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

The signal circuit 10 includes a plurality of electric circuits that are selectively energized in the output unit P2. The plurality of electric circuits include a controlled electric circuit including a switch and a resistor connected in series. The controlled electric circuit is an electric circuit to be controlled by the submersion control circuit 12 when the switch operating device 1 gets wet. In the example of FIG. 1, the signal circuit 10 has five paths EP1～EP 5. The input unit P1 and the output unit P2 are selectively connected by one of the five electric lines EP1 to EP5.

The first electric circuit EP1 is energized when the switch S1 is in the closed state. In FIG. 1A, the current flowing through the first electric circuit EP1 is indicated by a dotted arrow. The current flows to the output unit P2 through the switch S1 without passing through the resistor.

The second electric circuit EP2 is energized when the switch S1 is in the open state and the switch S2 is in the closed state. In FIG. 1B, the current flowing through the second electric circuit EP2 is indicated by a dotted arrow. The current flows to the output unit P2 through the resistor R1 and the switch S2.

The third electric circuit EP3 is energized when the switches S1 and S2 are in the open state and the switch S3 is in the closed state. In FIG. 1C, the current flowing through the third electric circuit EP3 is indicated by a dotted arrow. The current flows to the output unit P2 through the resistors R1, R2, and the switch S3.

The fourth electric circuit EP4 is energized when each of the switches S1 to S3 is in the open state and the switch S4 is in the closed state. In FIG. 1D, the current flowing through the fourth electric circuit EP4 is indicated by a dotted arrow. The current flows to the output unit P2 through the resistors R1 to R3 and the switch S4.

The fifth electric circuit EP5 is energized when all four switches S1 to S4 are in the open state. In FIG. 1E, the current flowing through the fifth electric circuit EP5 is indicated by a dotted arrow. The current flows through the resistors R1 to R4 to the output unit P2.

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

The submersion control circuit 12 operates when the switch operating device 1 gets wet. In the example of FIG. 1, when connected to a power source by the submersion detection circuit 11, an electric component such as a relay is operated. Then, the resistance of one or a plurality of controlled electric circuits in the signal circuit 10 is lowered. Further, the submersion control circuit 12 fixes the switch signal to a predetermined value. For example, another one or a plurality of controlled electric circuits in the signal circuit 10 are connected to a portion of a predetermined potential to fix the output voltage to the predetermined voltage. Specifically, another one or a plurality of controlled electric circuits in the signal circuit 10 are grounded.

Specifically, the submersion control circuit 12 includes a normally open relay connected in parallel to the resistor R1 in the second electric circuit EP2, which is the controlled electric circuit, and is always used when the switch operating device 1 gets wet. The open relay is closed to bypass the resistor R1. That is, a new electric circuit (second electric circuit EP2S when submerged) is energized by opening an electric circuit that bypasses the resistor R1 in the second electric circuit EP2. In FIG. 1F, the current flowing through the second electric circuit EP2S when submerged is indicated by a dotted arrow.

Further, the submersion control circuit 12 includes a normally open type relay provided in the grounding electric circuit connected to the third electric circuit EP3 which is the controlled electric circuit. The submerged control circuit 12 closes the normally open relay when the switch operating device 1 gets wet, and grounds the third electric circuit EP3. The submersion control circuit 12 grounds the third electric circuit EP3 between the resistor R2 and the resistor R3, for example.

Relays include contact relays and non-contact relays. Contact relays include electromagnetic relays. Non-contact relays include solid state relays using semiconductor switching elements such as thyristors, triacs, diodes and transistors.

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 electric power to the switch operating device 1. In the example of FIG. 1, it is a storage battery such as an in-vehicle 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 due to the leakage current generated when the switch operating device 1 gets wet. In the following, for convenience, the voltage output by the regulator 21 will be referred to as the 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 portion 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 a point on the electric circuit to which the voltage after being adjusted by the regulator 21 is applied. It may be one point on the electric circuit to which the power supply voltage Vcc is applied.

The input unit P4 is a portion where signals output by other devices enter the motor control device 2. In the example of FIG. 1, it is a point on the electric circuit to which the output voltage of the switch operating device 1 is applied.

In the example of FIG. 1, the input unit P1 of the switch operation device 1 and the output unit P3 of the motor control device 2 are connected by a signal line SL1. Further, the output unit P2 of the switch operation device 1 and the input unit P4 of the motor control device 2 are connected by a signal line SL2. The signal line SL1 and the signal line SL2 are housed 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 provided with a CPU, RAM, ROM, and the like. The motor control unit 22 controls the electric motor according to the signal level in the input unit P4, that is, the signal level of the switch signal output by the switch operation device 1.

Specifically, the motor control unit 22 controls the electric motor according to the voltage level in the input unit P4, that is, the voltage level in five stages output by the switch operating device 1.

The voltage levels in the five stages 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. Determined by the ratio to 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 of the resistance value r5 of the resistor R5 to 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 in the closed state. 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) in 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 rotationally drives the electric motor in the direction of lowering the window until the window is completely lowered. Hereinafter, this operation is referred to as an “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 rotationally drives the electric motor until the window is completely lowered.

The second voltage level V2 is determined by the ratio of the resistance value r5 of the resistor R5 to 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 energizes when the switch S2 is operated, that is, when the switch S2 is in the closed state. The second electric circuit EP2 includes a resistor R1. Therefore, the second voltage level V2 is determined by the ratio of the resistance value r1 of the resistor R1 and the resistance value r5 of the resistor R5 (V2 / (Vcc-V2) = r5 / r1). The motor control unit 22 rotationally drives the electric motor in the direction of lowering the window 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. Hereinafter, this operation is referred to as a "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 of the resistance value r5 of the resistor R5 to 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 to 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 rotationally drives the electric motor in the direction of raising the window until the window is completely raised. Hereinafter, this operation is referred to as an "auto-up operation". In this case, the switch S3 functions as an auto-up switch. Even if the operation of the switch S3 is stopped, the motor control unit 22 continuously rotationally drives the electric motor until the window is completely raised.

The fourth voltage level V4 is determined by the ratio of the resistance value r5 of the resistor R5 to 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 energizes when the switch S4 is operated, that is, when the switch S4 is in the closed state. The fourth electric circuit 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)). The motor control unit 22 rotationally drives the electric motor in the direction of raising the window 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. Hereinafter, this operation is referred to as a "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 of the resistance value r5 of the resistor R5 to 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 energizes 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.

The five-step voltage level is evenly distributed between, for example, the power supply voltage Vcc and the ground voltage. The respective resistance values of the resistors R1 to R5 are determined so that such an even allocation is realized.

Next, the voltage level in 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 submersion detection circuit 11 connects the power supply 20 and the submersion control circuit 12 to operate the submersion control circuit 12. The submersion control circuit 12 operates an electric component such as a relay to reduce the resistance of one or a plurality of controlled electric circuits in the signal circuit 10. Further, the submersion control circuit 12 grounds another one or a plurality of 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 not submerged. The electric circuit energized when the submerged control circuit 12 is operating is for the same first electric circuit EP1 as when the submerged 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 not submerged. This is because the submersion control circuit 12 operates so as to reduce the resistance of the second electric circuit EP2. Specifically, as shown in FIG. 1F, the submersion control circuit 12 opens an electric circuit that bypasses the resistor R1 in the second electric circuit EP2 (see FIG. 1B) to energize the submerged second electric circuit EP2S. .. Since the second electric circuit EP2S when submerged does not include a resistor, the voltage level is equal to the voltage (for example, power supply voltage Vcc) in the input unit P1 of the switch operating device 1. 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 executes the auto-down operation. That is, the switch S2, which has functioned 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 rotationally 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 submersion control circuit 12 grounds the third electric circuit EP3. Specifically, the submersion control circuit 12 grounds the electric circuit on the upstream side (the side close to the power supply 20) of the switch S3. In the example of FIG. 1C, the third electric circuit EP3 is grounded between the resistor R2 and the resistor R3. Therefore, the voltage level in the input unit P4 is in the ground 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, with reference to FIGS. 2 and 3, 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. FIG. 2 is a diagram showing a 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 the time t1 to the time t2, the switch S2 is operated from the time t3 to the time t4, the switch S3 is operated from the time t5 to the time t6, and the switch S3 is operated from the time t7. The output voltage when the switch S4 is operated until the 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 shows 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 cycle regardless of whether or not the switch operation 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 value TH1 (YES in step ST1), the motor control unit 22 executes an auto-down operation (step ST2). Specifically, 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 motor 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 equal to or more than 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 executes the 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 executes 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 or not the output voltage is equal to or more 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.

When it is determined that the output voltage is equal to or higher than the threshold value TH3 (YES in step ST5), the motor control unit 22 executes the auto-up operation (step ST6). Specifically, when the switch S3 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 TH3 and executes the auto-up operation.

When it is determined that the output voltage is less than the threshold value TH3 (NO in step ST5), the motor control unit 22 determines whether or not the output voltage is equal to or more than the threshold value 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 value TH4 (YES in step ST7), the motor control unit 22 executes the manual up operation (step ST8). Specifically, when the switch S4 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 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 the manual down operation or the manual up operation is being executed, the electric motor is stopped. If the electric motor is stopped, maintain that state. If an auto-down operation or an auto-up operation is being executed, 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 ground state. That is, it is maintained below the threshold 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 above configuration, the switch operating device 1 can prevent erroneous detection of the signal level by the motor control device 2 when water getting wet or the like occurs. Specifically, the switch operating device 1 is an output when a switch (switch S1 or switch S2, hereinafter collectively referred to as a "down switch") for lowering the window when submerged is operated. Make the voltage as high as possible. For example, the voltage is set to a level higher than the highest threshold value TH1.

Further, the switch operating device 1 is an output voltage when the switch (switch S3 or switch S4, hereinafter collectively referred to as "up switch") for raising the window when submerged in water is closed. To be as small as possible. For example, the voltage is set to a level lower than the lowest threshold value TH4.

Therefore, the switch operating device 1 can prevent, for example, erroneously outputting a voltage at the same level as when the up switch is operated even though the down switch is operated. As a result, the window can be reliably lowered when the down switch is operated during submersion.

Further, the switch operating device 1 can prevent, for example, erroneously outputting a voltage at the same level as when the up switch is operated 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 executed when the up switch is closed due to leakage current or the like regardless of the operation of the operator. The leakage current is generated at, for example, the signal lines SL1 and SL2.

Further, in the above-described embodiment, when the switch operating device 1 is submerged and none of the switches S1 to S4 is operated, the output voltage in the output unit P2 becomes an extremely low level. This is because the fifth electric circuit EP5 is grounded by the submersion 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 the motor control unit 22 determines 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 to ensure that the down switch has been operated even when the output voltage fluctuates greatly due to leakage current or the like.

FIG. 4 shows a flowchart showing a flow of processing in which the motor control unit 22 reduces the threshold value TH1 when the switch operation 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 operation 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.

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

Next, a configuration example of the submersion detection circuit 11 and the submersion control circuit 12 will be described with reference to FIG. FIG. 5 is a schematic view showing a configuration example of the power window control device 100, and corresponds to FIG. FIG. 5 differs from FIG. 1 in that the details of the submersion detection circuit 11 and the submersion control circuit 12 are shown, but is common to FIG. 1 in other respects. Therefore, the explanation of the common part is omitted, and the difference part is explained in detail. 5A and 5B show a particular state of the power window controller 100 shown in FIG. Specifically, FIG. 5A shows a state when the switch S2 is operated while the switch operating device 1 is submerged. FIG. 5B shows a state when the switch S3 is closed while the switch operating device 1 is submerged.

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

In the example of FIG. 5, the submersion control circuit 12 includes a relay 120 and a relay 123A. The relay 120 is a normally open type relay that is closed when the switch operating device 1 is submerged. The relay 123A is a normally open type relay that is closed when the switch operating device 1 is submerged. In the example of FIG. 5, the relay 120 is composed of an electromagnetic relay, and the relay 123A is composed of an NPN transistor.

When the switch operating device 1 is submerged and the space between the pair of pads in the water leakage detection pad 110 is energized, the relay 111 is closed. Specifically, the base voltage of the PNP type transistor is lowered, and a current flows from the emitter to the collector. As a result, as shown by the dotted arrow in FIG. 5A, a current flows from the power supply 20 through the submersion detection circuit 11 to the submersion control circuit 12.

Then, when a current flows from the power supply 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 while the switch operating device 1 is submerged, the current passes through the relay 120 and the switch S2 without passing through the resistor R1 as shown by the dotted arrow in FIG. 5A. It flows. Therefore, the voltage level in the input unit P4 is the first voltage level V1. As a result, the motor control unit 22 can execute the auto-down operation.

Further, when a current flows from the power supply 20 to the relay 123A, the relay 123A is closed. Specifically, the base voltage of the NPN transistor rises, and a current flows from the emitter to the collector. When the relay 123A is closed, the electric circuit is grounded between the resistor R2 and the resistor R3.

Therefore, even if the switch S3 is closed when the switch operating device 1 is submerged, the current is directed toward the submerged detection circuit 11 and the submerged control circuit 12 as shown by the dotted arrows in FIG. 5B. It only flows to the ground through the relay 120, the resistor R2, and the relay 123A, and does not flow toward the switch S3. Therefore, the voltage level in the input unit P4 is in the ground state. As a result, the motor control unit 22 does not raise the window even when the switch S3 is closed. The same applies when the switch S4 is closed.

Next, another configuration example of the submersion control circuit 12 will be described with reference to FIG. FIG. 6 is a schematic view showing another configuration example of the power window control device 100, and corresponds to FIG. FIG. 6 differs from FIG. 1 in that the details of the submersion detection circuit 11 and the submersion control circuit 12 are shown, but is common to FIG. 1 in other respects. Further, the submersion detection circuit 11 and the relay 123A in FIG. 6 are the same as the submersion detection circuit 11 and the relay 123A in FIG. Therefore, the description of the portion already described will be omitted, and the portion peculiar to the configuration of FIG. 6 will be described in detail. 6A and 6B show a particular state of the power window controller 100 shown in FIG. Specifically, FIG. 6A shows a state when the switch S2 is operated while the switch operating device 1 is submerged. FIG. 6B shows a state when the switch S3 is closed while the switch operating device 1 is submerged.

In the example of FIG. 6, the submerged control circuit 12 includes relays 122, 123, and 123A. The relay 122 is a normally open type relay that is closed when the switch operating device 1 is submerged. The relay 123 is a normally open type relay that is closed when the switch operating device 1 is submerged. In the example of FIG. 6, the relay 122 is composed of a P-type MOSFET, and the relay 123 is composed of 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 rises, 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 drops, and a current flows from the source to the drain.

Therefore, when the switch S2 is operated while 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 shown by the dotted arrow in FIG. 6A. It flows. Therefore, the voltage level in the input unit P4 is the first voltage level V1. As a result, the motor control unit 22 can execute the auto-down operation.

Further, when the switch operating device 1 is submerged, the relay 123A is closed. Specifically, the base voltage of the NPN transistor rises, and a current flows from the emitter to the collector. When the relay 123A is closed, the electric circuit is grounded between the resistor R2 and the resistor R3.

Therefore, even if the switch S3 is closed when the switch operating device 1 is submerged, the current is directed toward the submerged detection circuit 11 and the submerged control circuit 12 as shown by the dotted arrows in FIG. 6B. It only flows to the ground through the relay 120, the resistor R2, and the relay 123A, and does not flow toward the switch S3. Therefore, the voltage level in the input unit P4 is in the ground state. As a result, the motor control unit 22 does not raise the window even when 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. 7. FIG. 7 is a schematic view showing still another configuration example of the power window control device 100. The power window control device 100 of FIG. 7 differs 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 explanation of the common part is omitted, and the difference part is explained in detail.

In FIG. 7, in the switch operating device 1, the port on the side close to the power supply 20 is the output unit P2, and the port on the side close to the ground is the input unit P1. In the motor control device 2, the port on the side close to the power supply 20 is the input unit P4, and the port on the side close to the ground is the output unit P3. Therefore, the voltage at the input unit P1 is equal to the ground voltage.

Further, in the motor control device 2, the resistor R5 is connected between the power supply 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-step 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. Then, when the switch S4 is operated, when the switch S3 is operated, and when the switch S2 is operated, the output voltage becomes smaller in this order, and becomes the minimum when the switch S1 is operated.

When the switch operating device 1 is submerged, the switch operating device 1 provides an alternative two-step voltage level by dividing the pressure. Specifically, the output voltage of the switch operating device 1 becomes maximum when all the switches S1 to S4 are in the open state, when the switch S3 is in the closed state, and when the switch S4 is in the closed state. This is because the submersion control circuit 12 grounds the electric circuit between the resistor R2 and the resistor R3. Then, it becomes the minimum when the switch S1 is operated and when the switch S2 is operated. This is because the submersion control circuit 12 opens an electric circuit that bypasses the resistor R1.

As described above, the switch operation device 1 includes, for example, an output unit P2 that outputs a switch signal, and a plurality of electric paths EP1 to EP5 that are connected to the output unit P2 and are selectively energized. The plurality of electric circuits EP1 to EP5 may be partially overlapped as described above, or may be completely independent. The plurality of electric circuits EP1 to EP5 include an electric circuit EP2 as a controlled electric circuit including a switch S2 connected in series and a resistor R1. Further, the switch operating device 1 includes a submerged control circuit 12 that operates when the switch operating device 1 is submerged to reduce the resistance of the electric circuit EP2. With this configuration, the switch operating device 1 can prevent the motor control unit 22 from erroneously detecting the signal level when water getting wet 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 to change the output voltage at the output unit P2 when the switch S2 is closed from the original second voltage level V2. It can be increased 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. Further, 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 operation device 1 gets wet. In this case, the false detection of the signal level by the motor control device 2 includes the false detection that the up switch has been operated and the 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 operation device 1 is submerged. Therefore, it is not necessary to detect whether or not 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 has been operated according to whether or not the switch operating device 1 is submerged.

Further, the switch operation device 1 includes a submersion detection circuit 11 that operates when submerged and connects the power supply and the submersion control circuit 12. The power source may be a power source 20 mounted on the motor control device 2, a 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 submersion control circuit 12 when submerged.

Further, the submersion control circuit 12 includes relays 120 and 122 connected in parallel to the resistor R1 in the electric circuit EP2 as the controlled 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 water.

Further, the power window control device 100 using the switch operation device 1 uses, for example, a switch signal output by the output unit P2 when the electric circuit EP2 as a controlled 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 even though the manual down switch is operated.

Further, the plurality of electric circuits EP1 to EP5 that are alternately energized include two electric wires EP1 and EP2 having different resistances. The switch signal output by 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. The switch signal sometimes 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 operation device 1 and is connected to the switch operation device 1 via a 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 having separate housings, 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. In addition, the degree of freedom of arrangement inside the vehicle door is increased. Therefore, the switch operation device 1 and the motor control device 2 can be mounted at 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 operation device 1 includes an auto down switch S1 for outputting the auto down switch signal to the signal line SL2 and a manual down switch S2 for outputting the manual down switch signal to the signal line SL2. When the submersion control circuit 12 is not operating, the output value of the manual down switch signal is different from the output value of the auto down switch signal. For example, the output voltage level of the manual down switch signal (second voltage level V2) is lower than the output voltage level of the auto down switch signal (first voltage level V1). On the other hand, when the submersion control circuit 12 is operating, the output value of the manual down switch signal becomes 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 operating 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 regardless of which of the switch S1 and 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.

Further, the submersion control circuit 12 operates when the switch operating device 1 is submerged to ground the electric circuit EP3 as the controlled electric circuit. With this configuration, the switch operating device 1 can prevent the motor control unit 22 from erroneously detecting the signal level when water getting wet or the like occurs. For example, in the example of FIG. 1, the switch operating device 1 grounds 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. It can be lowered to (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. Further, 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 in the closed state. Therefore, the output voltage when the up switch is closed can be kept away from the higher threshold value TH3 of the two threshold values TH3 and TH4, and the output voltage can be more reliably prevented from exceeding the threshold value TH3. As a result, when the switch operating device 1 gets wet and the up switch is unintentionally closed due to a leakage current or the like, the motor control device 2 erroneously detects the signal level. Can be prevented. In this case, the erroneous detection of the signal level by the motor control device 2 includes erroneously detecting that the up switch (particularly the auto up switch) has been operated even though the up switch has not been operated. It is also possible to prevent the window from rising even when the upswitch is actually operated. This is to prevent the window from being raised when the vehicle is submerged.

Further, the submersion control circuit 12 includes a relay 123A provided in a grounding electric circuit connected to the electric circuit EP3 as a controlled electric circuit, and closes the relay 123A when the switch operating device 1 is submerged. With this configuration, the switch operating device 1 can ground the electric circuit EP3 when submerged.

Further, the power window control device 100 using the switch operation device 1 uses, for example, a switch signal output by the output unit P2 when the electric circuit EP3 as a controlled electric circuit is energized as a signal for raising the window. .. With this configuration, the power window control device 100 can prohibit the window from rising even when the switch S3 as an auto-up switch is closed when the switch operation 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 controlled electric circuit to be grounded includes two electric circuits EP3 and EP4 having different resistances. The switch signal output by 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. The switch signal sometimes output by the output unit P2 is a manual up switch signal.

Further, the switch operating device 1 has an auto-up switch S3 for outputting the auto-up switch signal to the signal line SL2 as an output line, and a manual up switch S4 for outputting the manual up switch signal to the signal line SL2. Be prepared. When the submersion control circuit 12 is not operating, the output value of the auto-up switch signal is different from the output value of the manual up switch signal. For example, the output voltage level of the auto-up switch signal (third voltage level V3) is higher than the output voltage level of the manual up switch signal (fourth voltage level V4). On the other hand, when the submersion control circuit 12 is operating, the output value of the auto-up switch signal becomes 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 equal at a voltage level lower than the fourth voltage level V4 (for example, the ground voltage). With this configuration, when the switch operating 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 when 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 embodiment of the present invention has been described in detail above. However, the present invention is not limited to the embodiments described above. Various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention.

1 ... Switch operation device 2 ... Motor control device 10 ... Signal circuit 11 ... Submersion detection circuit 12 ... Submersion control circuit 20 ... Power supply 21 ... Regulator 22 ... Motor Control unit 100 ・ ・ ・ Power window control device 110 ・ ・ ・ Water leakage detection pad 110 111 ・ ・ ・ Relay 111 120 ～ 123, 123A ・ ・ ・ Relay CB ・ ・ ・ Cable EP1 ・ ・ ・ First electric circuit EP2 ・ ・ ・2nd electric circuit EP2S ・ ・ ・ When submerged 2nd electric circuit EP3 ・ ・ ・ 3rd electric circuit EP4 ・ ・ ・ 4th electric circuit EP5 ・ ・ ・ 5th electric circuit P1 ・ ・ ・ Input part P2 ・ ・ ・ Output part P3 ・ ・ ・ Output Part P4 ... Input part R1 to R5 ... Resistor S1 to S4 ... Switch SL1, SL2 ... Signal line

Claims (8)

Input section and
The output section that outputs the switch signal and
A plurality of electric circuits that are selectively energized to connect the input unit and the output unit, and include a plurality of electric circuits to be controlled including a switch and a resistor connected in series, and a plurality of electric circuits.
It is provided with a submersion control circuit that operates when submerged and connects the controlled electric circuit to a predetermined potential .
The controlled electric circuit connects the input unit and the output unit.
Switch operating device. The output section that outputs the switch signal and
A plurality of electric circuits connected to the output unit and selectively energized, and a plurality of electric circuits including a controlled electric circuit including a switch and a resistor connected in series, and a plurality of electric circuits.
A switch operating device including a submersion control circuit that operates when submerged to connect the controlled electric circuit to a predetermined potential.
The submergence-time control circuit includes a relay provided in the connected grounding path to the control target path, for grounding the control target path by closing the relay during submersion of the switch operating device,
Switch operation unit. The relay includes a contact relay and a non-contact relay.
The switch operating device according to claim 2. A submersion detection circuit that operates when submerged and connects the power supply and the submersion control circuit is provided.
The switch operating device according to any one of claims 1 to 3. A power window control device using the switch operation device according to any one of claims 1 to 4.
The switch signal output by the output unit when the controlled electric circuit is energized is a signal for raising the window.
Power window controller. The controlled 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-up switch signal, and the two electric circuits The switch signal output by the output unit when the other of them is energized is a manual up switch signal.
The power window control device according to claim 5. Equipped with a motor control unit that controls the 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 has an output line and
The switch operating device includes an auto-up switch for outputting an auto-up switch signal to the output line and a manual up switch for outputting a manual up switch signal to the output line.
When the submersion control circuit is not operating, the output value of the auto-up switch signal is different from the output value of the manual up switch signal.
The power window control device according to claim 7.

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