JP3679157B2 - Ignition key warning sound control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ignition key warning sound control device for avoiding interference between a warning sound for forgetting to remove an ignition key and a sound from an audio device.
[0002]
[Prior art]
For example, when the driver opens the door on the driver's seat while holding the ignition key inserted into the ignition switch hole when the vehicle is stopped, the driver can feel that the driver has forgotten to remove the ignition key. An alarm system for generating an alarm sound is known.
[0003]
The ignition switch includes an off position (hereinafter referred to as an “OFF position”), an accessory position where the accessory circuit is turned on (hereinafter referred to as an ACC position), and an ignition circuit which is in an on state corresponding to the rotation position of the ignition key. Generally, an ON position (hereinafter referred to as an ON position) is set. The alarm system is configured such that an alarm sound for preventing the user from forgetting to remove the ignition key is sounded only when the ignition key is in the OFF position or the ACC position and the door on the driver's seat is opened.
[0004]
[Problems to be solved by the invention]
However, the alarm system according to the prior art is configured such that an alarm sound for forgetting to remove the key is always sounded when the ignition key is in the OFF position or the ACC position and the driver's side door is opened. . For this reason, for example, if the driver stops the engine while driving on the beach or highland and tries to take a break by opening the door on the driver's seat with the ignition key inserted in the vehicle, an unnecessary alarm sound is generated. There is an inconvenience that it sounds troublesome.
[0005]
In this case, the driver does not forget to pull out the ignition key, but simply opens the door on the driver side with the engine stopped, but is inconvenienced by the unexpected alarm sound as described above. There is.
[0006]
Further, in the alarm system according to the prior art, when the alarm sound sounds despite the driver being aware of the ignition key insertion state, there is no means for stopping the alarm sound, There is a difficulty that is recognized as noise for the driver or passengers. That is, when the automobile is stopped, this unnecessary alarm sound can be annoying when trying to enjoy the audio device by opening the door with the ignition key inserted.
[0007]
The present invention has been made to overcome the above-described disadvantages, and is an ignition key warning sound that can prevent an alarm sound from being generated under the urging action of the audio device while the ignition key is inserted. An object is to provide a control device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an ignition switch detecting means for detecting whether or not an ignition switch energized by an ignition key is in an on state,
Door opening detection means for detecting whether the door on the driver's seat side is open,
Warning sound generating means for generating a warning sound to inform the driver that the driver has forgotten to remove the ignition key;
Whether or not the power switch of the audio unit is turned on via a signal derived from an audio unit that is provided in the passenger compartment and electrically connected to the battery power source regardless of the on / off state of the ignition switch A control means for determining whether or not
And the control means derives a signal to the warning sound generation means based on detection signals respectively derived from the ignition switch detection means and the door opening detection means when the power switch of the audio unit is on. The generation of the warning sound from the warning sound generating means is stopped.
[0009]
According to the present invention, the detection signal indicating that the ignition switch is in the OFF state (OFF position or ACC position) via the ignition switch detection means, and the door on the driver's seat side are opened via the door opening detection means. And when the power switch of the audio unit electrically connected to the battery power source is in the on state regardless of the on / off state of the ignition switch , A signal for preventing the generation of the warning sound is sent to the warning sound generating means. As a result, the warning sound generating means is prevented from generating warning sounds such as alarms.
[0010]
Further, the present invention provides an ignition switch detecting means for detecting whether or not an ignition switch energized by an ignition key is in an on state,
Door opening detection means for detecting whether the door on the driver's seat side is open,
Warning sound generating means for generating a warning sound to inform the driver that the driver has forgotten to remove the ignition key;
Control means for determining whether or not the volume of the audio unit is equal to or higher than a set value via an output signal level derived from an audio unit provided in a vehicle interior;
And the control means outputs a signal to the warning sound generation means based on detection signals respectively derived from the ignition switch detection means and the door opening detection means when the volume of the audio unit is larger than the set value. And the generation of the warning sound from the warning sound generating means is stopped.
[0011]
According to the present invention, the detection signal indicating that the ignition switch is in the OFF state (OFF position or ACC position) via the ignition switch detection means, and the door on the driver's seat side are opened via the door opening detection means. When the control signal is introduced to the control means and the volume of the audio unit is larger than the set value, the control means sends a signal for preventing the warning sound from being generated to the warning sound generating means. As a result, the warning sound generating means is prevented from generating warning sounds such as alarms.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of an ignition key warning sound control apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.
[0013]
FIG. 1 is a schematic configuration diagram of an ignition key warning sound control apparatus according to an embodiment of the present invention.
[0014]
The ignition key warning sound control device 10 includes an electronic control unit (hereinafter referred to as an ECU) 12 that functions as control means and has a key removal forget alarm generation circuit (not shown). The ECU 12 detects whether or not an ignition key is inserted into the hole of the ignition key cylinder, and when the ignition key is inserted into the hole, an insertion detection switch 14 for leading an ON signal to the ECU 12; A door opening detection switch (door opening detection means) 16 is connected to detect the open / closed state of the driver's door and derive an ON signal to the ECU 12 when the driver's door is opened. One end of the insertion detection switch 14 and the door opening detection switch 16 is grounded to the ground side.
[0015]
For example, an audio unit 18 that integrally includes a radio, a cassette tape recorder, a compact disc (CD), and the like is electrically connected to the ECU 12, and the audio unit 18 is electrically connected to a battery power source having a voltage + B. ing. Between the audio unit 18 and the ECU 12, a first line 20 through which an audio power signal is derived from the audio unit 18 to the ECU 12 when the power switch of the audio unit 18 is turned on, and reproduction of the audio unit 18. The second line 22 for leading the sound output signal level to the ECU 12 is electrically connected to each other. An ignition switch (between the battery power source and the ECU 12) detects the rotation position of the ignition key and is turned off when the ignition key is in the OFF position or the ACC position. Ignition switch detection means) 24 is electrically connected.
[0016]
The ECU 12 is electrically connected to a warning sound generating means 26 for generating a warning sound such as an alarm in order to notify the driver that the driver has forgotten to remove the ignition key. Based on this, a warning sound such as an alarm is generated from the warning sound generating means 26.
[0017]
The ignition key warning sound control apparatus 10 according to the embodiment of the present invention is basically configured as described above. Next, its operation and effects will be described based on the flowchart shown in FIG. .
[0018]
First, it is detected by the insertion detection switch 14 whether or not the ignition key is inserted into the hole of the ignition key cylinder that constitutes the ignition switch 24 (step S1), and the ignition key is inserted into the hole of the ignition key cylinder. The insertion detection switch 14 is turned on to derive an on signal to the ECU 12, and the process proceeds to step S2. On the other hand, when the ignition key is not inserted into the hole of the ignition key cylinder, the insertion detection switch 14 is in an OFF state, and a warning sound such as an alarm for notifying the driver of forgetting to remove the ignition key is generated. Since it is not necessary, the process proceeds to step S6.
[0019]
In step S2, it is detected whether or not the ignition switch 24 is in an ON state under the urging action of the ignition key. That is, when the ignition key is in the OFF position or the ACC position, the ignition switch 24 is turned off, an off signal is derived to the ECU 12, and the process proceeds to step S3. On the other hand, when the ignition key is in the ON position, the ignition switch 24 is turned on, and the engine is running and the ignition key cannot be removed. There is no need to generate a warning sound such as an alarm notifying that the user forgets to unplug, and the process proceeds to step S6.
[0020]
In step S3, the ECU 12 determines whether or not the power switch of the audio unit 18 is turned on by an audio power signal introduced from the audio unit 18 via the first line 20, and the power switch is turned off. When it becomes, it progresses to step S4. On the other hand, when the audio power signal of the audio unit 18 is on, the process proceeds to step S6 and no alarm sound such as an alarm is generated.
[0021]
That is, when the power signal of the audio unit 18 is in the on state, any one of the radios, cassette tape recorders, compact discs, etc. constituting the audio unit 18 is energized, and the driver Eighteen reproduced sounds (for example, music and sound flowing from a speaker) can be heard. Accordingly, the driver can be aware that the ignition key is forgotten to be removed by the reproduced sound derived from the audio unit 18, and therefore it is not necessary to sound a warning sound such as an alarm to prevent the ignition key from being forgotten. .
[0022]
In step S4, it is detected by the door opening detection switch 16 whether or not the driver side door is opened. When the driver side door is opened, the process proceeds to step S5, where the attachment is derived from the ECU 12. A warning sound such as an alarm is generated via the warning sound generating means 26 by the force signal. That is, the door opening detection switch 16 is turned on when the door on the driver's seat is opened, and an on signal is derived to the ECU 12. The ECU 12 determines that the door on the driver's seat side is opened by inputting the ON signal, and derives an energizing signal to the warning sound generating means 26. As a result, a warning sound such as an alarm is sounded to notify the driver that the ignition key has been forgotten to be removed. On the other hand, when the door on the driver's seat side is not opened, the door opening detection switch 16 is turned off and the process proceeds to step S6, and no warning sound such as an alarm is generated.
[0023]
Thus, in the ignition key warning sound control apparatus 10 according to the present embodiment, when the power switch of the audio unit 18 is on even when the door on the driver's seat is opened, the ignition key is removed. It is possible to prevent the generation of warning sounds such as alarms for notifying forgetting. Therefore, for example, when driving on the beach or plateau, when the driver stops the engine and opens the door on the driver's side, if the driver tries to take a break, an alarm will occur if the power switch of the audio unit 18 is on. As a result, it does not sound annoying and can be comfortably rested.
[0024]
Next, an ignition key warning sound control apparatus 10a according to another embodiment of the present invention will be described. In the embodiment described above, the generation of the warning sound is controlled by the on / off state of the power switch of the audio unit 18, whereas this warning sound control device 10a for the ignition key is shown in step S3a of FIG. As described above, the difference is that the presence or absence of the warning sound is controlled according to the output level of the volume of the audio unit 18.
[0025]
That is, an output signal level of volume is output from the audio unit 18 to the ECU 12 via the second line 22, and the ECU 12 compares the set value held in advance with the output signal level, and outputs the output signal. When the level is larger than the set value, a signal for preventing the warning sound from being generated is derived to the warning sound generating means 26 to prevent the warning sound such as an alarm.
[0026]
Since the driver can be aware of forgetting to remove the ignition key due to the playback sound with a large volume derived from the audio unit 18, it is necessary to sound a warning sound such as an alarm in order to prevent forgetting to remove the ignition key. Because there is no.
[0027]
Since other configurations and operational effects are the same as those of the above-described embodiment, detailed description thereof is omitted.
[0028]
【The invention's effect】
The ignition key warning sound control apparatus according to the present invention provides the following effects.
[0029]
That is, when the door on the driver's seat side is opened and the power switch of the audio unit is turned on, the generation of a warning sound such as an alarm for notifying that the ignition key is forgotten to be removed is prevented. Therefore, for example, if the driver stops the engine and opens the door on the driver's side with the ignition key inserted into the vehicle while driving on the beach or plateau, the audio unit power switch is turned on. If this is the case, a warning sound such as an alarm will not sound and you will not feel bothersome, so you can rest comfortably.
[0030]
Further, when the volume of the audio unit is equal to or higher than a set value, the generation of warning sound such as the alarm is prevented. On the other hand, if the volume of sound flowing from the audio unit is low and it is difficult for the driver to hear the sound of the radio or the like, the driver can be informed of forgetting to remove the ignition key via a warning sound such as an alarm.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an ignition key warning sound control apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing an operation of the ignition key warning sound control apparatus shown in FIG. 1;
FIG. 3 is a flowchart showing an operation of an ignition key warning sound control apparatus according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10, 10a ... Ignition key warning sound control device 12 ... Electronic control unit (ECU) 14 ... Insertion detection switch 16 ... Door opening detection switch 18 ... Audio unit 20, 21 ... Track 24 ... Ignition switch

Claims (2)

An ignition switch detecting means for detecting whether or not the ignition switch energized by the ignition key is in an ON state;
Door opening detection means for detecting whether the door on the driver's seat side is open,
Warning sound generating means for generating a warning sound to inform the driver that the driver has forgotten to remove the ignition key;
Whether or not the power switch of the audio unit is turned on via a signal derived from an audio unit that is provided in the vehicle interior and electrically connected to the battery power supply regardless of the on / off state of the ignition switch A control means for determining whether or not
And the control means derives a signal to the warning sound generation means based on detection signals respectively derived from the ignition switch detection means and the door opening detection means when the power switch of the audio unit is on. An ignition key warning sound control device for stopping the generation of a warning sound from the warning sound generating means. An ignition switch detecting means for detecting whether or not the ignition switch energized by the ignition key is in an ON state;
Door opening detection means for detecting whether the door on the driver's seat side is open,
Warning sound generating means for generating a warning sound to inform the driver that the driver has forgotten to remove the ignition key;
Control means for determining whether or not the volume of the audio unit is equal to or higher than a set value via an output signal level derived from an audio unit provided in a vehicle interior;
And when the volume of the audio unit is larger than the set value, the control means outputs a signal to the warning sound generation means based on detection signals respectively derived from the ignition switch detection means and the door opening detection means. , And the generation of the warning sound from the warning sound generating means is stopped.

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