JP2003253933A - Answerback mechanism, as well as keyless entry system and automobile equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique available in locking in a keyless entry system, which can issue notification that the locking has been completed without damaging a living environment. <P>SOLUTION: The keyless entry system 1 is comprised of a remote-controlled receiver 5, a door locking motor 15, a state switch 17, a determining circuit 27, and a horn 31. The remote-controlled receiver 5 inputs a locking signal to the door locking motor 15 and the determining circuit 27. The door locking motor 15 is driven in response to input of the locking signal, to thereby try to change over the state switch 17 from an unlocking state to a locking state. If the state switch 17 remains in the unlocking state, an unlocking status signal is input to the determining signal 27. Thus, the determining signal 27 determines that a signal input therein is the unlocking status signal, and then the horn 31 blows. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an answerback mechanism, a keyless entry system including the same, and an automobile.

[0002]

2. Description of the Related Art Conventionally, a keyless entry system has been known as a system for locking or unlocking doors and trunks of automobiles. The keyless entry system is used to lock automobile doors,
Alternatively, it is a system that unlocks remotely by using radio waves or infrared rays.

In the keyless entry system, a mechanism for notifying the completion of locking or unlocking by turning on a hazard lamp or the like, a so-called
An answer back mechanism may be attached.

FIG. 4 is a schematic configuration diagram of a keyless entry system 101 having the answer back mechanism described above. The keyless entry system 101 is used for locking the door of a car.

The keyless entry system 101 includes a remote controller 103, a remote controller receiver 105, a lock signal wiring 107, a door lock motor 109, a status switch 111, a lock status signal wiring 113, a determination circuit 115, and a hazard lamp. 117.

Now, a process for locking the door of the automobile using the keyless entry system 101 will be described. Before locking, the state switch 111
Is unlocked.

First, the remote control 103 transmits a radio wave to the remote control receiver 105 to instruct to lock the state switch 111 of the door of the automobile, and the remote control receiver 105 receives the radio wave transmitted from the remote control 103. . The remote control receiver 105 inputs a lock signal to the door lock motor 109 via the lock signal wiring 107. Here, the lock signal is a signal instructing to lock the state switch 111. The door lock motor 109 is driven by the input lock signal, thereby switching the state switch 111 from unlocked to locked. Then, the state switch 111 inputs the lock status signal to the determination circuit 115 via the lock status signal wiring 113. Here, the lock status signal is a signal having information that the status switch is in the locked status. Next, the determination circuit 115 determines whether the input signal is the lock status signal or the unlock status signal. When the input signal is determined to be the lock status signal, the hazard lamp 117 is turned on.

[0008]

By the way, in the keyless entry system 101, since the doors are locked by using radio waves, etc., the doors are locked in a place where the vehicle cannot be seen or a place away from the vehicle. Is possible. However, in this case, since it is not possible to confirm whether or not the hazard lamp 117 is turned on, it is not possible to confirm whether or not the door is locked normally.

Therefore, in order to eliminate the above-mentioned adverse effect, it is conceivable to sound the horn as a means for notifying the completion of locking, instead of turning on the hazard lamp 117.
As a result, it is possible to confirm the completion of locking the door even when the vehicle is locked in a place where the vehicle cannot be visually inspected. However, in this case, a loud horn is sounded each time the door is locked, which is not preferable from the viewpoint of living environment.

From the above, the hazard lamp is turned on,
Alternatively, when a keyless entry system having an answer-back mechanism for ringing a horn is used to lock a door of an automobile from a place where the vehicle cannot be visually inspected, an adverse effect occurs in any case.

The present invention has been made in view of the above points, and it is an object of the present invention to know that the lock is completed in the keyless entry system without damaging the living environment. To provide the technology.

[0012]

The answerback mechanism according to the present invention determines whether or not locking is completed when a locking operation is performed by a keyless entry system having a function of locking remotely by using electromagnetic waves. An answer back mechanism having a function of informing whether or not, when the locking operation is carried out by the keyless entry system, a judging means for judging whether or not the locking is completed, and the locking means is not completed by the judging means. And a warning means for issuing a warning when it is determined that

Thus, when the determination means determines that the locking is not completed, the warning means issues a warning, so that it is possible to easily know that the locking is not completed. Therefore, according to the present invention, it is possible to easily know that the locking by the keyless entry system is not completed, and consequently prevent the harmful effects that may occur due to the incomplete locking, such as theft.

Further, when the determination means determines that the locking is not completed, the warning means issues a warning to notify that the locking is not completed, that is, some failure occurs in the keyless entry system. You can easily know. Therefore, according to the present invention, when a malfunction occurs in the keyless entry system, it is possible to easily know the fact of the occurrence.

Further, according to the present invention, when the determination means determines that the locking is not completed, the warning means issues a warning. Therefore, conversely, if the warning is not given by the warning means, it means that the locking is completed. Therefore, according to the present invention, it is possible to easily know that the locking by the keyless entry system is completed.

The present invention is further arranged such that the warning means emits a warning sound.

By the way, for example, when the warning means issues a visually appealing warning, if the object to be locked cannot be seen visually or if the object is locked away from the object, the warning is issued. It is not possible to see whether or not the lock is completed, and thus it is not possible to confirm whether or not the lock is completed.

According to the present invention, when the determination means determines that the locking is not completed, the warning means emits a warning sound, so that the object to be locked can be locked from a place where the object to be locked cannot be visually observed. Even if you do, you can know that the locking is not completed. Therefore, according to the present invention, it is possible to confirm whether or not the locking is completed even when the locking is performed from a place where the object to be locked cannot be visually observed.

Considering the certainty of the performance of the keyless entry system, the proportion of the number of times the keyless entry system has been locked is judged to be extremely low by the judging means. .

According to the present invention, the warning sound is emitted by the warning means when the judgment means judges that the locking is not completed. Therefore, the frequency of the warning sound is extremely low. Therefore, the above warning sound does not cause noise pollution. Therefore, according to the present invention, it is possible to confirm whether or not the locking is completed without damaging the living environment.

Further, according to the present invention, the warning means issues a notice informing of the completion of the locking when the judging means judges that the locking is completed.

As a result, when locking is performed by the keyless entry system, the warning means issues different notifications depending on whether the locking is completed or not, so that the completion of the locking is completed. It is possible to easily discriminate the time when not doing. Therefore, according to the present invention, it is possible to more easily confirm whether or not the locking is completed.

Further, according to the present invention, the keyless entry system is configured to be switchable between a locked state and an unlocked state, and after the keyless entry system is locked, the lockless status signal is output when the keyless entry system is in the locked state. To the above determination means,
A switch unit that sends an unlock status signal to the determination unit when in the unlocked state is provided, and when the determination unit receives the lock status signal from the switch unit, it is determined that the locking is completed. When the unlock status signal is received from the switch unit, it is determined that the locking is not completed.

As a result, the judging means judges whether or not it is locked, based on the lock status signal and the unlock status signal directly transmitted from the switch portion which is the object of actual locking. You can make a definite decision. Therefore, according to the present invention, the determination means can reliably determine whether or not the lock is made.

In the present invention, the keyless entry system further includes transmitting means for transmitting an electromagnetic wave for instructing locking, receiving the electromagnetic wave transmitted from the transmitting means, and receiving a lock signal for instructing locking when the electromagnetic wave is received. The determining means includes a receiving means having a function of transmitting the lock signal and a control means having a function of receiving the lock signal transmitted by the receiving means and operating to lock the lock signal when the lock signal is received. It is to determine whether or not the locking is completed when or after the transmission of the lock signal from the receiving means to the control means is completed.

By the way, when the determination means determines whether or not the lock means is locked during transmission of the lock signal, that is, while the control means having the function of operating to lock by the lock signal is in operation, the control means locks. The determination is made before the end of the lock signal transmission time set so that the above can be surely performed. Therefore, the determination unit may determine whether the lock operation is completed before the lock operation by the control unit is completed.

Here, according to the present invention, the determination means determines whether or not the lock signal has been transmitted, or whether or not the lock signal has been locked. Therefore, the determination means makes the determination after the end of the transmission time, that is, after the locking operation by the control means is completed. Therefore, the determination unit does not make an erroneous determination due to incomplete locking work. Therefore, according to the present invention, the determination means can more reliably determine whether or not the lock has been made.

The keyless entry system according to the present invention comprises any of the above-mentioned answer back mechanism.

A vehicle according to the present invention comprises the above keyless entry system.

The vehicle according to the present invention further comprises a warning means,
It is configured to issue a warning by a horn.

Thus, since the horn mounted on the vehicle is used as the warning means, it is not necessary to separately provide the vehicle with the warning means. Therefore, according to the present invention, the structure of the automobile can be simplified and the cost can be reduced.

[0032]

According to the present invention, the answer back mechanism determines whether or not the locking is completed when the keyless entry system performs the locking operation, and the determination means completes the locking. Since it is provided with a warning means for issuing a warning when it is determined that there is no lock, it is possible to know that the lock is completed in the keyless entry system without damaging the living environment.

[0033]

1 is a schematic configuration diagram of a keyless entry system 1 having an answer back mechanism according to the present invention. In this embodiment, the keyless entry system 1 is used to lock the door of the automobile. Here, keyless entry system 1
Is a system having a function of locking a door of an automobile without using a key. What is the answerback mechanism?
The keyless entry system 1 is a mechanism for informing whether or not the locking of the vehicle door has been completed.

The keyless entry system 1 includes a remote controller 3, a remote controller receiver 5, and a first lock signal wiring 7.
A first unlock signal wiring 9, a second lock signal wiring 11, a second unlock signal wiring 13, a door lock motor 15, and a door lock actuator (not shown).
, Lock knob rod (not shown), and status switch 1
7, the first lock status signal wiring 19, the first unlock status signal wiring 21, the second lock status signal wiring 23, the second unlock status signal wiring 25, the determination circuit 27, and the horn drive circuit 29. A horn 31, a hazard lamp drive circuit 33, and a hazard lamp 35. The determination means is the determination circuit 2
7, the warning means is a horn drive circuit 29,
The answerback mechanism is composed of a horn 31, a hazard lamp drive circuit 33, and a hazard lamp 35. The answerback mechanism includes a second lock signal wiring 11, a second lock status signal wiring 23, a second unlock status signal wiring 25, a determination circuit 27, and a horn. It is composed of a drive circuit 29, a horn 31, a hazard lamp drive circuit 33, and a hazard lamp 35, a switch section is composed of a state switch 17, a transmitting means is composed of a remote controller 3, and a receiving means is composed of a remote controller receiver 5. The control means is constituted by the door lock motor 15.

The remote controller 3 has a lock button (not shown) and an unlock button (not shown). Then, when the lock button is pressed, a radio wave for instructing the remote control receiver 5 to lock the vehicle door status switch 17 is transmitted, and when the unlock button is pressed, the remote control receiver 5 causes the vehicle door status switch 17 to be locked. A radio wave is transmitted to instruct to unlock 17.

The remote control receiver 5 receives the radio wave transmitted from the remote control 3. The remote control receiver 5 is connected to the door lock motor 15 by a first lock signal wiring 7 and a first unlock signal wiring 9. The first lock signal wiring 7 is for inputting a lock signal, which will be described later, from the remote control receiver 5 to the door lock motor 15 when the remote control receiver 5 receives a radio wave instructing to lock the state switch 17. This is the wiring used. For the first unlock signal wiring 9, the remote control receiver 5 has a status switch 17
This is a wire used for inputting an unlock signal, which will be described later, from the remote control receiver 5 to the door lock motor 15 when a radio wave instructing to unlock is received. The lock signal is a signal instructing to lock the state switch 17, and the unlock signal is a signal instructing to lock the state switch 17.

Further, the remote control receiver 5 is connected to the status switch 17 by the first lock status signal wiring 19 and the first unlock status signal wiring 21. The first lock status signal wire 19 is a wire used for inputting a lock status signal described later from the status switch 17 to the remote control receiver 5 when the status switch 17 is in the locked state. The first unlock status signal wiring 21 is a wiring used for inputting an unlock status signal, which will be described later, from the status switch 17 to the remote control receiver 5 when the status switch 17 is in the unlocked state. The lock status signal is a signal having information that the state switch 17 is in the locked state, and the unlock status signal is a signal having information that the state switch 17 is in the unlocked state.

The door lock motor 15 is connected to the door lock actuator and operates the door lock actuator by rotating the door lock motor 15 in the normal direction or the reverse direction by inputting a lock signal or an unlock signal. The door lock actuator is connected to the lock knob rod, and the lock knob rod is connected to the status switch 17. By operating the door lock actuator, the status switch 17 is locked or unlocked via the lock knob rod.

The state switch 17 can be switched between locked and unlocked states.

One end of the second lock signal wiring 11 is connected to the first lock signal wiring 7 and the other end is connected to the determination circuit 27. One end of the second unlock signal wiring 13 is connected to the first unlock signal wiring 9 and the other end is connected to the determination circuit 27. The second lock signal wiring 11 is a wiring used to input a lock signal from the remote control receiver 5 to the determination circuit 27, and the second unlock signal wiring 13 outputs an unlock signal from the remote control receiver 5 to the determination circuit 27. This is the wiring used for input.

One end of the second lock status signal wiring 23 is connected to the first lock status signal wiring 19, and the other end is connected to the determination circuit 27. One end of the second unlock status signal wiring 25 is connected to the first unlock status signal wiring 21, and the other end is connected to the determination circuit 27. The second lock status signal wiring 23 is a wiring used for inputting a lock status signal from the state switch 17 to the determination circuit 27, and the second unlock status signal wiring 25 is an unlock status from the state switch 17 to the determination circuit 27. It is a wiring used for inputting a signal.

The determination circuit 27 is connected to the horn drive circuit 29 and the hazard lamp drive circuit 33. The determination circuit 27 determines whether the state switch 17 is normally switched from unlocked to locked based on the input lock signal and lock status signal or unlock status signal. Here, keyless entry system 1
When the determination circuit 27 determines that the state switch 17 is not switched from unlocked to locked when the door is locked by the determination circuit 27, the determination circuit 27 inputs a horn drive signal to the horn drive circuit 29, and When the determination circuit 27 determines that the state switch 17 is switched from unlocked to locked, the determination circuit 27 inputs a hazard lamp drive signal to the hazard lamp drive circuit 33.

The horn drive circuit 29 is connected to the horn 31, and when the determination circuit 27 inputs a horn drive signal, the horn 31 sounds.

The hazard lamp drive circuit 33 is connected to the hazard lamp 35, and when the determination circuit 27 inputs a hazard lamp drive signal, the hazard lamp 35 blinks.

Now, description will be given of the case where the keyless entry system 1 having the answerback mechanism according to the present invention is used to lock the door of the automobile. Before locking, the state switch 17
Is unlocked.

First, when the lock button of the remote controller 3 is pressed, the remote controller 3 sends a radio wave to the remote controller receiver 5 to instruct the remote controller receiver 5 to lock the state switch 17 of the door of the automobile. The remote control receiver 5 receives the radio wave transmitted from the remote control 3, and determines whether the received radio wave is a radio wave instructing to lock or a radio wave instructing to unlock. Then, the remote control receiver 5 determines that the received radio wave is a radio wave that instructs locking.

After the determination, the remote control receiver 5 inputs the lock signal to the door lock motor 15 via the first lock signal wiring 7. At the same time, the lock signal is also input to the determination circuit 27 via the second lock signal wiring 11. The door lock motor 15 is driven by the input lock signal and attempts to switch the status switch 17 from unlocked to locked via the door lock actuator and the lock knob rod. Here, if some failure occurs in the keyless entry system 1,
For example, when a foreign object is caught in the door lock actuator, the state switch 17 does not switch from unlocked to locked, but remains in the unlocked state. As shown in FIGS. 2 and 3, the lock signal input time T1 is 300 to 700 msec.
It is preferably msec.

Next, as shown in FIG. 1, the status switch 1
When 7 is switched to the lock, the lock status signal is input to the remote control receiver through the first lock status signal wiring 19, and at the same time, the lock status signal is determined through the second lock status signal wiring 23. 27 is input. On the other hand, when the status switch 17 is still in the unlocked state, the unlock status signal is input to the remote control receiver 5 through the first unlock status signal wiring 21, and at the same time, the second unlock status is received. The unlock status signal is input to the determination circuit 27 via the signal wiring 25.

Next, as shown in FIGS. 2 and 3, at the time t after the end of the input time T1 of the lock signal to the determination circuit 27.
The determination circuit 27 determines whether the input signal is the lock status signal or the unlock status signal. Then, as shown in FIG. 3, when it is determined that the input signal is the unlock status signal, the determination circuit 27 inputs the horn drive signal to the horn drive circuit 29, which causes the horn 31 to operate. Ring. As a result, it is possible to know that the locking of the door of the automobile has not been completed, and further it is possible to know that some malfunction has occurred in the keyless entry system, for example, that a foreign object has been caught in the door lock actuator.

On the other hand, as shown in FIG. 2, when the input signal is determined to be the lock status signal, the determination circuit 27 inputs the hazard lamp drive signal to the hazard lamp drive circuit 33, which causes the hazard lamp drive signal. The lamp 35 lights up. As a result, it is possible to know that the locking of the vehicle door has been completed.

According to this embodiment, when the determination circuit 27 determines that the state switch 17 is still in the unlocked state, the horn 31 issues a warning, so that the keyless entry system 1 locks the door. It is possible to easily know that the lock has not been completed, and thus it is possible to prevent an adverse effect that may occur due to incomplete locking, such as theft.

In addition, the decision circuit 27 causes the state switch 1
When it is determined that 7 remains unlocked, a warning is issued by the horn 31 to lock the door, that is, some failure occurs in the keyless entry system 1, for example, ,
It is possible to easily know that a foreign object is caught in the door lock actuator.

In addition, the decision circuit 27 causes the state switch 1
When it is determined that 7 remains unlocked, the horn 31 issues a warning. Therefore, conversely, if the horn 31 does not issue a warning, it means that the door has been locked. Therefore, it is possible to easily know that the locking by the keyless entry system 1 is completed.

Further, the judgment circuit 27 causes the status switch 1
When it is determined that 7 remains unlocked, a warning is issued by the horn 31, so even if the door is locked from a place where the car cannot be seen or a place away from the car. , You can know that the lock is not completed. Therefore, even when the door is locked from a place where the automobile cannot be visually inspected, it is possible to confirm whether or not the locking is completed.

Considering the certainty of the performance of the keyless entry system 1, the keyless entry system 1
It is considered that the rate at which the determination circuit 27 determines that the state switch 17 remains in the unlocked state is extremely low with respect to the number of times the door is locked by. Here, according to the present embodiment, when the determination circuit 27 determines that the state switch 17 is still in the unlocked state, the horn 31 issues a warning. Therefore, the frequency with which the horn 31 issues a warning is Extremely low. Therefore, the warning by the horn 31 does not cause noise pollution. Therefore, it is possible to confirm whether or not the door has been locked without damaging the living environment.

When the door is locked by the keyless entry system 1, a warning by the hazard lamp 35 is issued when the locking is completed, and a warning by the horn 31 is issued when the locking is not completed. The time when the locking is completed and the time when the locking is not completed can be easily distinguished. Therefore, it is possible to more easily know that the locking by the keyless entry system 1 is completed.

Further, since the judging circuit 27 judges whether or not it is locked based on the lock status signal and the unlock status signal directly transmitted from the state switch 17, the judging circuit 27 judges whether or not it is locked. It is possible to make a reliable determination.

Further, since the judging circuit 27 judges whether or not the door is locked at the time t1, the judgment is made after completion of the locking work by the door lock motor 15. Therefore, the determination circuit 27 does not make an erroneous determination due to the determination made at the time t2 shown in FIG. 2 or the time t3 shown in FIG. 3, for example. Therefore, the determination circuit 27 can more reliably determine whether or not it is locked.

Further, in this embodiment, since the warning is issued by the horn 31 mounted on the vehicle, it is not necessary to provide a mechanism for issuing a warning separately to the vehicle. Therefore, the structure of the automobile can be simplified and the cost can be reduced.

In the present embodiment, the keyless entry system 1 having an answer back mechanism is used to lock the door of the automobile, but the present invention is not limited to this, and for example,
It may be used to lock the luggage compartment of a car.

Further, in the present embodiment, the keyless entry system 1 having an answer back mechanism is used for locking an automobile, but the present invention is not limited to this, and may be used for locking a house, for example.

Further, in the present embodiment, the horn 31 is used to warn that the state switch 17 remains in the unlocked state, but the present invention is not limited to this, and a buzzer may be used, for example. .

Further, in the present embodiment, the hazard lamp 35 is used to notify that the status switch 17 is switched from unlocked to locked, but the present invention is not limited to this, and a horn having a tone color different from that of the horn 31 may be used. You may use. Further, when the status switch 17 is switched from unlocked to locked, no warning may be given.

Further, in the present embodiment, the judgment circuit 27
Is determined at time t1, but not limited to this, any time may be set when the lock signal is turned off or after that.

Further, in the present embodiment, a radio wave is used as the electromagnetic wave transmitted from the remote controller 3 to the remote controller receiver 5, but the invention is not limited to this, and infrared rays may be used, for example.

Further, in the present embodiment, the keyless entry system 1 has the above-mentioned configuration, but the present invention is not limited to this and may have another configuration.

The answerback mechanism according to the present embodiment has a function of notifying whether or not the lock of the door of the automobile by the keyless entry system 1 is completed, but the present invention is not limited to this, and the functions described above are not limited thereto. In addition, it may have a function of notifying whether the unlocking of the door of the automobile is completed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a keyless entry system having an answerback mechanism according to the present embodiment.

FIG. 2 is a diagram showing changes in states of a lock signal, a lock status signal, and an unlock status signal according to the present embodiment with the lapse of time.

FIG. 3 is a diagram showing changes in states of a lock signal, a lock status signal, and an unlock status signal according to the present embodiment with the passage of time.

FIG. 4 is a schematic configuration diagram of a keyless entry system having an answerback mechanism.

[Explanation of symbols]

1 keyless entry system 3 Remote control (transmitting means) 5 Remote control receiver (reception means) 7 First lock signal wiring 11 Second lock signal wiring 15 Door lock motor (control means) 17 Status switch (switch section) 23 Second lock status signal wiring 25 2nd unlock status signal wiring 27 Judgment circuit (judgment means) 29 Horn drive circuit (warning means) 31 horn (warning means) 33 Hazard lamp drive circuit (warning means) 35 Hazard lamp (warning means)

Continued front page    (72) Inventor Tsuyoshi Matsumoto             23-9 Imaikecho, Anjo City, Aichi Prefecture Mitsubishi Electric             Line Industry Co., Ltd. Okazaki Development Center F-term (reference) 2E250 AA21 BB08 BB25 CC27 CC28                       DD06 FF24 FF27 FF35 HH01                       JJ03 KK03 LL01 RR11 SS08                       SS12 TT03 UU02 UU03 VV01

Claims (8)

[Claims] 1. An answer back mechanism having a function of notifying whether or not locking is completed when a locking operation is performed by a keyless entry system having a function of locking remotely by using electromagnetic waves, When the locking operation is performed by the above keyless entry system, a judging means for judging whether or not the locking is completed, and a warning means for issuing a warning when the judging means judges that the locking is not completed. , An answerback mechanism comprising. 2. The answerback mechanism according to claim 1, wherein the warning means is configured to emit a warning sound. 3. The answerback mechanism according to claim 1, wherein the warning means issues a notification notifying the completion of locking when the determination means determines that the locking is completed. 4. The keyless entry system is configured to be switchable between a locked state and an unlocked state, and after locking by the keyless entry system, if the lock state is in the locked state, the lock status signal is judged as above. On the other hand, when the unlock status signal is transmitted to the means, the switch means for sending the unlock status signal to the judging means is provided, and the judging means locks when the lock status signal is received from the switch section. The answerback mechanism according to claim 1, wherein the lock-back mechanism determines that the lock is not completed when the unlock status signal is received from the switch unit while determining that the lock is completed. 5. A keyless entry system, which transmits an electromagnetic wave for instructing locking, receives the electromagnetic wave transmitted from the transmitting means, and, when receiving the electromagnetic wave, transmits a lock signal for instructing locking. The receiving unit having a function and the control unit having a function of receiving the lock signal transmitted from the receiving unit and operating to lock the lock signal when the lock signal is received are provided. The answer back mechanism according to any one of claims 1 to 4, wherein when the transmission of the lock signal from the means to the control means is ended or after the end, it is determined whether or not the locking is completed. 6. A keyless entry system comprising the answerback mechanism according to claim 1. Description: 7. An automobile provided with the keyless entry system according to claim 6. 8. The vehicle according to claim 7, wherein the warning means is configured to issue a warning by a horn.