JP2002213124A - Locking/unlocking device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking/unlocking device for a vehicle, capable of enhancing the accuracy of detection of a fraudulent unlocking operation while securing crime-prevention properties. SOLUTION: A microcomputer 26 outputs a transponder driving signal from a transmission circuit 23 when receiving an ID code signal including a locking code from a door key 11 over the first receiving circuit 22. The microcomputor 26 receives a transponder signal from the door key 11 and compares a transponder code of the door key 11 with that of the microcomputer 2. In this case, when the respective transponder codes correspond to each other, the microcomputer 26 is set not to go into alarm mode. In other words, when the door key 11 is within a vehicle 2, the microcomputer 26 is not put into the alarm mode though a door lock is fastened by an operation part 12 of the door key 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle locking and unlocking device, and more particularly to a vehicle locking and unlocking device for remotely locking and unlocking a vehicle door lock.

[0002]

2. Description of the Related Art In recent years, automobiles have been required to have not only improved basic performance and safety but also improved operability. As a device for improving such operability, a vehicle locking / unlocking device that locks and unlocks a door even at a position away from a vehicle by operating an operation unit provided on a door key is known.

[0003] Conventionally, a vehicle locking and unlocking device having a security function has been proposed. In this type of vehicle locking / unlocking device, the caution mode is set when the door lock is locked by remote control from the door key. In this alert mode, when the door is unlocked by an operation other than the remote operation, or when the door is opened after the unlocking operation, the alarm provided on the vehicle is driven. ing. That is, in the alert mode, the alarm device is driven when there is a possibility that an unauthorized unlocking operation has been performed.

[0004]

By the way, the owner of the door key may operate the door key consciously or accidentally in the vehicle cabin to lock the door lock.

However, in a conventional vehicle locking / unlocking device,
Even in such a case, the alert mode is set. For this reason,
When the door is manually unlocked from the vehicle interior or when the door is opened after the manual unlocking, the alarm is activated. That is, in the conventional vehicle locking / unlocking device, even if it is certain that an unauthorized unlocking operation is not performed, the alarm device may be driven, and the detection accuracy for the unauthorized unlocking operation is low. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle locking / unlocking device capable of improving the detection accuracy for an unauthorized unlocking operation while ensuring security. It is in.

[0007]

According to a first aspect of the present invention, there is provided a door key for outputting a radio signal, the door key being provided in a vehicle, receiving the radio signal when receiving the radio signal. A communication control device that locks and unlocks the door lock based on the condition that the door lock locked based on the wireless signal is unlocked by an operation other than the locking operation based on the wireless signal. And an alarm means for issuing an alarm, the door key automatically outputs a response signal in response to the response request signal when receiving a response request signal from the communication control device, The communication control device receives a response signal from the door key transmitted in response to the response request signal, and a response request signal output unit that outputs the response request signal to a predetermined area in the vehicle compartment. Receiving means, and summarized in that a control means for prohibiting the driving of the alarm means upon receiving the response signal.

According to a second aspect of the present invention, in the vehicle locking and unlocking apparatus according to the first aspect, the door key generates an electromotive force according to the response request signal, and automatically generates the response signal according to the electromotive force. And a transponder control unit that outputs the data to

According to a third aspect of the present invention, in the vehicle locking and unlocking apparatus according to the first aspect, the control means makes the engine startable only while receiving a response signal from the door key. That is the gist.

Hereinafter, the "action" of the present invention will be described. According to the first aspect of the present invention, the door key can perform two-way communication with the communication control device. And
Even when the door lock is locked by a wireless signal from the door key, the communication control device prohibits the driving of the alarm unit when the response signal from the door key is received. For this reason, even if the door is unlocked by an operation other than the unlocking operation by the wireless signal in this state, the alarm means will not be driven on the condition that the door is unlocked. Since the door key and the communication control device can communicate with each other in the vehicle compartment, when the door key holder is present in the vehicle compartment, the alarm unit is not activated regardless of how the door lock is unlocked.
That is, there is no possibility that the alarm unit is driven even though the door key is present in the vehicle.

According to the second aspect of the present invention, the transponder control unit generates an electromotive force by the response request signal, so that a power supply for driving the transponder control unit is not required. That is, the power supply required for the door key is only a power supply for transmitting a radio signal. Therefore, the power consumption of the power supply for the door key can be reduced.

According to the invention described in claim 3, according to claim 1 of the present invention,
In addition to the above operation, the communication control device makes the engine startable only when the door key is present in the vehicle. Therefore, when starting the engine, a door key is indispensable. Therefore, unauthorized starting of the engine is prevented, and the security of the vehicle is further improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below in detail with reference to FIGS.

As shown in FIG. 1, a vehicle locking / unlocking device 1
Is the door key 1 possessed by the owner (driver) of the vehicle 2
1 and a communication control device 21 mounted on the vehicle 2. The door key 11 includes an operation unit 12, a microcomputer (microcomputer) 13, a transmission circuit 14, and a transponder control unit 15.

The operation section 12 is composed of a push button switch and the like, and can be manually operated by a driver. In this embodiment, the operation unit 12 is configured by two push button switches including an unlock switch and a lock switch. And this operation unit 1
When 2 is operated, the microcomputer 13 outputs an ID code signal including an operation code (an unlock code or a lock code) and a predetermined ID code. This ID code signal is
A predetermined frequency (30 in this embodiment)
The signal is modulated to a wireless signal of 0 MHz) and output from the antenna 16 to the outside as a wireless signal. The microcomputer 26 and the transmission circuit 14 are driven by using a battery (not shown) provided in the door key 11 as a power supply.

When the transponder control unit 15 receives sufficient energy from the electromagnetic wave, it outputs a transponder signal as a response signal including a predetermined transponder ID code (transponder code). I have. Specifically, when the transponder control unit 15 receives a transponder driving radio wave from the communication control device 21, it automatically outputs a transponder signal of a predetermined frequency (134 kHz in this embodiment).

On the other hand, the communication control device 21 includes a first receiving circuit 22, a transmitting circuit 23 as transmitting means, a second receiving circuit 24 as receiving means, a switching circuit 25, and a microcomputer (microcomputer) 26 as controlling means. Have. As shown in FIG. 2, the communication control device 21 is disposed at a substantially central position in the room of the vehicle 2. The microcomputer 26 is connected to a door courtesy switch 31, a door lock driving device 32, and an alarm 33. As shown in FIG. 2, the door courtesy switch 31 is a switch provided for each door, detects the open / closed state of each door, and outputs the detection result to the microcomputer 26.
The door lock driving device 32 is a device for automatically locking / unlocking the door lock, and outputs a locked / unlocked state of the door lock to the microcomputer 26. The alarm device 33 includes a buzzer, a horn, and the like provided in the vehicle 2, and emits an alarm sound when driving.

The first receiving circuit 22, the transmitting circuit 23, and the second
The receiving circuits 24 are connected to the microcomputer 26, respectively. The antenna 27 is connected to the first receiving circuit 22. Further, the transmission circuit 23 and the second reception circuit 2
A switching circuit 25 is connected to 4, and an antenna 28 is connected to the switching circuit 25. The switching circuit 25 is a circuit for selectively connecting the antenna 28 to the transmission circuit 23 or the second reception circuit 24.

The first receiving circuit 22 can receive the ID code signal from the door key 11 via the antenna 27. The first receiving circuit 22 demodulates the ID code signal into a pulse signal to generate a received signal, and outputs the received signal to the microcomputer 26.

The transmitting circuit 23 converts the transponder driving signal as a response request signal output from the microcomputer 26 into a radio wave of a predetermined frequency (134 kHz in this embodiment) to generate a transponder driving radio wave, Output. The transponder driving radio wave is output to a predetermined area A1 in the room of the vehicle 2 as shown in FIG. Therefore,
In the predetermined area A1, the mutual communication between the door key 11 and the communication control device 21 becomes possible.

The second receiving circuit 24 can receive a transponder signal from the door key 11 via the antenna 28. The receiving circuit 24 generates a received signal by demodulating the transponder signal into a pulse signal, and outputs the received signal to the microcomputer 26.

The microcomputer 26 includes a C (not shown).
It is a CPU unit including a PU, a ROM, a RAM, and the like. The microcomputer 26 stores a preset ID code and transponder code. The ID code is set corresponding to the ID code set in the microcomputer 13 of the door key 11. The transponder code is set in correspondence with the transponder code set in the transponder control unit 15 of the door key 11.

Next, the processing performed by the microcomputer 26 will be described with reference to the flowchart shown in FIG. This process is repeatedly executed at predetermined time intervals based on a program stored in the ROM constituting the microcomputer 26. Further, the program may be recorded on a computer-readable recording medium other than the ROM.

First, in step S1, the microcomputer 26
Receives the ID code signal from the door key 11 and determines whether the ID code of the ID code signal matches its own ID code. Then, the microcomputer 26
When the ID codes match, the process proceeds to step S2.
If the D codes do not match, the process here is temporarily terminated. That is, the microcomputer 26 is in a state of waiting for reception of the ID code signal from the door key 11.

In step S2, the microcomputer 26
It is determined whether the lock code is included in the D code signal. Then, when the ID code signal does not include the lock code, that is, when the unlock code is included in the ID code signal, the microcomputer 26 proceeds to the process of step S3.

In step S3, the microcomputer 26 monitors an output signal from the door lock driving device 32 and determines whether or not the door lock is unlocked. Then, when the door lock is not in the unlocked state, that is, when the door lock is in the locked state, the microcomputer 26 proceeds to the process of step S4. When the door lock is in the unlocked state, the microcomputer 26 temporarily terminates the processing here.

In step S4, the microcomputer 26 outputs a control signal for unlocking the door lock to the door lock driving device 32 to unlock the door lock, and terminates the process once.

When the lock code is included in the ID code signal in the process of step S1, the microcomputer 2
6 shifts to the processing of step S5. In step S5, the microcomputer 26 monitors an output signal from the door lock driving device 32 and determines whether or not the door lock is locked. Then, when the door lock is not in the locked state, that is, when the door lock is in the unlocked state, the microcomputer 26 proceeds to the process of step S6. When the door lock is in the locked state, the microcomputer 26 shifts to the processing of step S7.

In step S6, the microcomputer 26 outputs a control signal for locking the door lock to the door lock driving device 32 to lock the door lock.
Move to the processing of.

In step S7, the microcomputer 26 outputs a transponder drive signal as a response request signal to the transmission circuit 23. Thereby, the transponder driving radio wave is output to the predetermined area A2 in the room of the vehicle 2.

In the following step S8, the microcomputer 26
Compares the transponder code included in the transponder signal from the door key 11 with its own transponder code, and ends the processing once if they match. When the transponder codes do not match, the microcomputer 26 proceeds to the process of step S9. That is, even when the microcomputer 26 cannot receive the transponder signal from the door key 11, the process proceeds to step S9.

Then, in step S9, the microcomputer 26 sets the alarm 33 to a drivable state, that is, an alarm mode. In this alarm mode, the microcomputer 26 monitors an output signal from the door lock driving device 32 and an output signal from the door courtesy switch 31. Then, the microcomputer 26 turns on the door courtesy switch 31 in a state where the door lock is unlocked by an operation other than the unlocking operation of the door lock based on the ID code signal from the door key 11 shown in steps S1 to S4. When the alarm 3
3 to output a drive signal. Thereby, the alarm 33
Will emit an alarm sound. That is, when the door is unlocked without using the door key 11, an alarm is issued as a possibility that an unauthorized door lock has been unlocked.

Next, the microcomputer 26 based on such processing
Will be described with reference to FIG. First, microcomputer 2
6 denotes a door key 11 as indicated by a point P1 in FIG.
When receiving the ID code signal including the locking code from the, the transponder driving signal is output as indicated by a point P2. If the transponder signal cannot be received from the door key 11 or the transponder codes do not match between the points P3 and P4, the microcomputer 26 enters the alarm mode as indicated by the point P4 and can drive the alarm 33. State.

Therefore, the door lock is unlocked by an operation other than the unlock operation of the door lock based on the ID code signal from the door key 11, and then the door courtesy switch 31 is turned on.
When the state is reached, the alarm 33 is driven and an alarm is issued.

The microcomputer 26 determines the point P in FIG.
As shown by 5, the door key 11 includes the locking code
When the D code signal is received, a transponder driving signal is output as indicated by a point P6. Then, when the transponder signal is received and the transponder codes match as indicated by the point P7, the microcomputer 26 does not enter the alert mode as indicated by the point P8. That is, when the door key 11 is present in the vehicle 2, the microcomputer 26 does not enter the alarm mode despite receiving the ID code signal including the locking code.

Accordingly, in this case, even if the door lock is unlocked by an operation other than the unlocking operation based on the ID code signal from the door key 11 and the door courtesy switch 31 is subsequently turned on, the alarm is activated. 33 is not driven.

As a result, as shown in FIG. 5, the microcomputer 26 of the vehicular locking / unlocking device 1 enters the alarm mode when the transponder signal cannot be received when the ID code signal including the locking code is received. In addition, microcomputer 2
No. 6 does not enter the alarm mode when the transponder signal can be received when the ID code signal including the lock code is received. When the ID code signal including the unlock code is received, the alarm mode is released.

Therefore, according to the present embodiment, the following effects can be obtained. (1) The door key 11 is capable of bidirectional communication with the communication control device 21. Then, the communication control device 21
Even when the door lock is locked by the ID code signal from the door key 11, when the transponder signal is received from the door key 11 in response to the transponder driving radio wave, the alarm mode is not set. Therefore, in this state, even if the door is unlocked and the door is opened by an operation other than the unlocking operation based on the ID code signal, the alarm 33 is not driven. Since the door key 11 and the communication control device 21 can communicate with each other in the room of the vehicle 2, no matter how the door lock is unlocked when the owner of the door key 11 is present in the room of the vehicle 2, The alarm 33 is not driven.

Therefore, when the owner of the door key 11 performs the locking operation with the door key 11 in the vehicle 2 and then unlocks the door by an operation other than the door key 11 and opens the door, the alarm 33 is activated. It is possible to prevent such an inconvenience as that. That is, it is possible to prevent an inconvenience that the alarm 33 is driven even though the operation is not an unauthorized unlocking operation. In other words, it is possible to improve the detection accuracy for an unauthorized unlocking operation.

(2) Since the transponder control unit 15 generates an electromotive force by the transponder driving radio wave, a power supply for driving the transponder control unit 15 is not required. That is, the power supply required for the door key 11 is only the power supply for driving the microcomputer 13 and the transmission circuit 14. Therefore, the power consumption of the power supply of the door key 11 can be suppressed low.

(3) The transponder drive signal is output only when an ID code signal including a lock code is received from the door key 11. For this reason,
Useless output of the transponder drive signal is prevented, and power consumption of the vehicle battery can be suppressed. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In each of the embodiments described below, points different from the first embodiment will be mainly described, and common points will be denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, an engine starting device 34 is connected to the microcomputer 26 of the communication control device 21 as shown by a two-dot chain line in FIG. An unillustrated engine start switch is provided in the vehicle 2. The engine starts and stops when the engine start switch is operated under a predetermined condition. As shown in FIG. 7, the microcomputer 26 outputs the transponder drive signal intermittently at predetermined time intervals T.

The main difference between the vehicle locking / unlocking device 1 and the first embodiment is the processing contents of the microcomputer 26. Therefore, the microcomputer 26 of the present embodiment
Will be described with reference to the flowchart shown in FIG.

First, in step S11, the microcomputer 2
6 outputs the transponder drive signal to the transmission circuit 23. Thereby, the transponder driving radio wave is output to the predetermined area A2 in the room of the vehicle 2.

In the following step S12, the microcomputer 26
Compares the transponder code included in the transponder signal from the door key 11 with its own transponder code, and determines whether or not they match. Then, when the transponder codes match with each other, the microcomputer 26 proceeds to the process of step S13. If the transponder codes do not match, or the transponder signal cannot be received, the microcomputer 26 proceeds to the processing in step S14.

In step S13, the microcomputer 26
An engine start permission signal for permitting the start of the engine is output to the engine start device 34, and step S1 is performed.
Then, the processing shifts to processing No. 4. Therefore, the engine can be started by the door key 11 only while the engine start permission signal is being output. That is, the engine is started when the engine start switch is operated while the engine start permission signal is being output.

In step S14, the microcomputer 26
Upon receiving an ID code signal from the door key 11,
It is determined whether or not the ID code of the D code signal matches its own ID code. When the ID codes match, the microcomputer 26 proceeds to the process of step S15, and when no ID code signal is received,
If the codes do not match, the process here is temporarily terminated. That is, the microcomputer 26 is in a state of waiting for reception of the ID code signal from the door key 11.

In step S15, the microcomputer 26
It is determined whether or not the lock code is included in the ID code signal. Then, when the ID code signal does not include the lock code, that is, when the unlock code is included, the microcomputer 26 proceeds to the process of step S16.

In step S16, the microcomputer 26
The output signal from the door lock driving device 32 is monitored to determine whether or not the door lock is unlocked. Then, when the door lock is not in the unlocked state, that is, when the door lock is in the locked state, the microcomputer 26 proceeds to the process of step S17. When the door lock is in the unlocked state, the microcomputer 26 temporarily terminates the processing here.

In step S17, the microcomputer 26
A control signal for unlocking the door lock is output to the door lock driving device 32 to unlock the door lock, and the process here is temporarily terminated.

Also, in the process of step S15, the ID
If the lock signal is included in the code signal, the microcomputer 26 proceeds to the process of step S18. Step S1
At 8, the microcomputer 26 monitors the output signal from the door lock driving device 32 to determine whether or not the door lock is locked. Then, when the door lock is not in the locked state, that is, when the door lock is in the unlocked state, the microcomputer 26 proceeds to the process of step S19. Also, the microcomputer 26
Shifts to the process of step S20 when the door lock is in the locked state.

In step S19, the microcomputer 26
A control signal for locking the door lock is output to the door lock driving device 32 to lock the door lock.
The processing shifts to 20.

In step S20, the microcomputer 26
It is determined whether or not the engine start is permitted. Then, if the engine start is permitted, the microcomputer 26 temporarily terminates the process here, and if not, the process proceeds to step S21.

Then, in step S21, the microcomputer 26 enters a state in which the alarm device 33 can be driven, that is, an alarm mode. Therefore, in this alarm mode, the door key 11
When the door lock is unlocked without using, an alarm is issued from the alarm device 33 as a possibility that an unauthorized door lock operation may be performed.

Next, the microcomputer 26 based on such processing is executed.
Will be described with reference to FIG. First, microcomputer 2
6 outputs a transponder drive signal as indicated by point P1 in FIG. Then, as indicated by a point P2, when the transponder signal is received from the door key 11 and the transponder codes match, the microcomputer 2
6 is an engine starter 34 as indicated by the point P2.
Outputs an engine start permission signal to the controller. This engine start permission signal is output while the transponder signal is being received. That is, when the door key 11 is present in the vehicle 2, the microcomputer 26 performs control so that the engine can be started only by the door key 11 (in this embodiment, the engine start switch). Moreover, the engine can be started only when the transponder code of the door key 11 and the transponder code of the communication control device 21 match, so that the vehicle locking and unlocking device 1 functions as a smart ignition device.

Then, even if the microcomputer 26 receives the ID code signal including the lock code from the door key 11 in the engine start permission state as shown at the point P3, the microcomputer 26 does not enter the alarm mode as shown at the point P4. That is, when the door key 11 is present in the vehicle 2, the microcomputer 26 does not enter the alarm mode despite receiving the ID code signal including the locking code.

When the microcomputer 26 receives the ID code signal including the lock code when the engine start permission signal is not output as indicated by the point P5, the microcomputer 26 enters the alarm mode as indicated by the point P6. That is, the microcomputer 26 enters the alarm mode when the door key 11 is not present in the vehicle 2 at the time of receiving the ID code signal including the locking code.

Therefore, according to the present embodiment, in addition to the effect described in the above (1) in the first embodiment,
The following effects can be obtained. (4) The microcomputer 26 makes the engine startable when the door key 11 exists in the room of the vehicle 2. Therefore, when starting the engine, the door key 11 is indispensable. Therefore, unauthorized starting of the engine by a forged key or the like can be prohibited, and the security of the vehicle can be further improved.

(5) In the startable state of the engine, the engine is started when the engine start switch is operated. That is, the vehicle locking and unlocking device 1
Also functions as a smart ignition device. Therefore, it is not necessary to insert the door key 11 into the key switch when starting the engine, and the operability of the vehicle 2 can be improved. (Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 8, the door key 11 in the present embodiment comprises an operation unit 12, a microcomputer 13, a transmission circuit 1,
4 and a receiving circuit 18. And the receiving circuit 1
An antenna 19 is connected to 8, and a receiving circuit 18 is connected to the microcomputer 13. That is, the door key 11 of the present embodiment is the same as the door key 11 of the above-described embodiments.
Is changed to the receiving circuit 18 and the antenna 19.

The receiving circuit 18 can receive the request signal output from the communication control device 21 via the antenna 19. The receiving circuit 18 demodulates the request signal into a pulse signal to generate a received signal, and outputs the received signal to the microcomputer 13.

The microcomputer 13 is connected to the operation unit 12
The ID code signal is automatically output as a response signal when this reception signal is received, in addition to when the is operated.

On the other hand, the communication control device 2 in the present embodiment
1 includes a receiving circuit (first receiving circuit) 22, a transmitting circuit 23, and a microcomputer 26. An antenna 28 is connected to the transmission circuit 23. That is, the communication control device 21 of the present embodiment has a configuration in which the second receiving circuit 24 and the switching circuit 25 of the communication control device 21 in each of the above embodiments are omitted.

The microcomputer 26 outputs a request signal as a response request signal intermittently at predetermined time intervals. This request signal is modulated by the transmission circuit 23 into a radio wave of a predetermined frequency (134 kHz in this embodiment). Then, the request signal is selectively output to a predetermined area A1 inside the vehicle 2 or a predetermined area A2 outside the vehicle, as shown in FIG. In the microcomputer 26, only the ID code is recorded, and the transponder code is not recorded.

Next, the processing performed by the microcomputer 26 will be described with reference to the flowchart shown in FIG. First, in step S31, the microcomputer 26
A request signal is output outside the vehicle. As a result, the request signal is output to the predetermined area A2 around the vehicle 2.

In the following step S32, the microcomputer 26
Is the ID included in the ID code signal from the door key 11.
The code is compared with its own ID code, and it is determined whether or not they match. Then, the microcomputer 26
When the D codes match with each other, the process proceeds to step S33, the door is unlocked in step S33, and the process proceeds to step S40. Also, the microcomputer 26
Moves to step S34 when the ID codes do not match or when the ID code signal cannot be received. Therefore, when the request signal is output outside the vehicle, the door lock is unlocked when the door key 11 is present in the predetermined area A2. In other words, the owner of the door key 11 can automatically unlock the door just by approaching the vehicle 2. That is, in the present embodiment, the vehicle locking / unlocking device 1 also functions as a smart entry device.

In step S34, the microcomputer 26
A request signal is output to the interior of the vehicle 2. Thereby, the request signal is output to the predetermined area A2 in the room of the vehicle 2.

In the following step S35, the microcomputer 26
Determines whether the ID codes match with each other. When the ID codes match, the microcomputer 26 proceeds to the process of step S36, outputs an engine start permission signal to the engine start device 34, and proceeds to the process of step S40.

If the ID codes do not match each other in step S35,
If the code signal cannot be received, the process proceeds to step S37. Then, in step S37, the microcomputer 26 determines whether or not the door lock is locked. Here, when the door lock is not in the locked state, that is, when the door lock is in the unlocked state, the microcomputer 26 shifts to the processing of step S38, and when the door lock is in the locked state, shifts to the processing of step S39.

In step S38, the microcomputer 26
After the door is locked, the process proceeds to step S39. Then, in step S39, the microcomputer 26
The state where the alarm 33 can be driven, that is, the alarm mode is set. Therefore, when the door is unlocked without using the door key 11 in the alert mode, the alarm 33 issues an alarm on the assumption that there is a possibility that an unauthorized door lock has been unlocked. That is, in the present embodiment, the microcomputer 26 does not lock the door lock by operating the operation unit 12 but also enters the alarm mode when the door lock is locked by the smart entry function, thereby maintaining a high crime prevention property. You.

On the other hand, step S33 or step S3
After the process in step 6, the microcomputer 26 proceeds to step S40.
It is determined whether a lock code has been received from the door key 11. When the microcomputer 26 receives the lock code, the process proceeds to step S41, and when the lock code is not received, the microcomputer 26 temporarily ends the process.

At step S41, the microcomputer 26
The output signal from the door lock drive device 32 is monitored to determine whether or not the door lock is locked. Then, when the door lock is not in the locked state, that is, when the door lock is in the unlocked state, the microcomputer 26 proceeds to the process of step S42. When the door lock is in the locked state, the microcomputer 26 shifts to the process of step S43.

In step S42, the microcomputer 26
A control signal for locking the door lock is output to the door lock driving device 32 to lock the door lock.
The process moves to the process of 43.

In step S43, the microcomputer 26
It is determined whether or not the engine start is permitted. If the engine start is permitted, the microcomputer 26 temporarily ends the process here, and if not, the process proceeds to step S44.

In step S44, the microcomputer 26
The state where the alarm 33 can be driven, that is, the alarm mode is set. Therefore, when the door is unlocked without using the door key 11 in the alarm mode, the alarm 33 issues an alarm on the assumption that there is a possibility that an unauthorized door lock has been unlocked.

That is, also in the present embodiment, even when the door lock is locked by operating the operation unit 12, the microcomputer 26 is in the engine start permission state, that is, when the door key 11 is in the room of the vehicle 2. , Is prohibited from entering the alert mode.

Therefore, according to the present embodiment, the following effects can be obtained in addition to the effects (1), (4) and (5) in each of the above embodiments. (6) The operability of the vehicle 2 can be further improved by adding the smart entry function. Further, the alarm mode is set even when the door lock is locked by the smart entry function, so that the security of the vehicle 2 is also maintained at a high level.

(7) The configuration of the communication control device 21 can be simplified as compared with the first and second embodiments. The embodiment of the present invention may be modified as follows.

The configuration of the door key 11 and the communication control device 21 in the first and second embodiments may be changed to the configuration of the door key 11 and the communication control device 21 in the third embodiment. That is, the transponder control unit 15 of the door key 11 is changed to the receiving circuit 18 and the antenna 19, and the second receiving circuit 24 and the switching circuit 25 of the communication control device 21 are omitted. By doing so, the configuration of the communication control device 21 can be simplified.

In each of the above embodiments, the antenna 28 for outputting the transponder drive signal or the request signal to the predetermined area A1 can be constituted by one or a plurality. Then, the antenna 28 in the vehicle 2
Is not limited to substantially the center of the room, and may be any position as long as the transponder drive signal or the request signal can be output only to the room.

In the second and third embodiments,
A shift position sensor is connected to the microcomputer 26.
When the transponder signal or the ID code signal is received from the door key 11 in the room of the vehicle 2, the engine can be started only when the shift position is in the "P" or "N" range and the door is in the closed state. Is also good. With this configuration, the engine can be started only in a safe state.

In the second and third embodiments, the engine start switch is provided in the room of the vehicle 2, and the engine is started by operating the engine start switch. That is, the vehicle locking / unlocking device 1 is made to function as a smart ignition device. However, an engine start switch is not always necessary. That is, a conventional structure in which the door key 11 is inserted into the key cylinder and the engine is started by rotating the key 11 may be used. In this way, the vehicle locking and unlocking device 1 can be provided with an immobilizer function, and the security of the vehicle 2 can be further improved.

In each of the above embodiments, the microcomputer 26
Is the alarm 3 when the door is opened in the alarm mode.
3 is driven. However, the microcomputer 26
The alarm 33 may be driven when the door is unlocked by an operation other than the operation of the door key 11 in the alarm mode.

Next, in addition to the technical ideas described in the claims, technical ideas grasped by the above-described embodiments will be enumerated below. (1) The vehicle locking and unlocking device according to claim 1,
The communication control device outputs the response request signal triggered by the wireless signal when receiving the wireless signal from the door key, and does not output the response request signal when the wireless signal is not received. According to the invention described in the technical concept (1), power consumption of the vehicle battery can be suppressed.

(2) In the vehicular locking / unlocking device according to claim 1 or 3, the response request signal output means outputs the response request signal to a predetermined area in the vehicle compartment and to a predetermined area outside the vehicle. The control means can automatically unlock the door lock upon receiving the response signal transmitted in response to the response request signal output to the outside of the vehicle, and receive the response signal. The door lock is automatically locked when it disappears, and the alarm means is made drivable. According to the invention described in the technical concept (2), crime prevention can be further improved.

[0086]

As described in detail above, according to the first to third aspects of the present invention, it is possible to improve the detection accuracy for an unauthorized unlocking operation while ensuring security.

According to the second aspect of the present invention, the power consumption of the power supply for the door key can be reduced. According to the third aspect of the present invention, it is possible to prevent unauthorized engine start, and to further improve the security of the vehicle.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a vehicle locking and unlocking device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the vehicle equipped with the vehicle locking and unlocking device of the embodiment.

FIG. 3 is a flowchart showing processing executed by the control unit of the embodiment.

FIG. 4 is a time chart showing an example of a control mode executed by the control unit of the embodiment.

FIG. 5 is a table showing a control mode executed by the control unit of the embodiment.

FIG. 6 is a flowchart illustrating processing executed by a control unit according to the second embodiment.

FIG. 7 is a time chart illustrating an example of a control mode executed by a control unit according to the second embodiment.

FIG. 8 is a block diagram illustrating a schematic configuration of a vehicle locking and unlocking device according to a third embodiment.

FIG. 9 is a plan view of the vehicle equipped with the vehicle locking and unlocking device of the embodiment.

FIG. 10 is an exemplary flowchart illustrating processing executed by the control unit of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle locking / unlocking device, 2 ... Vehicle, 11 ... Door key, 1
2 ... operation unit, 15 ... transponder control unit, 21 ... communication control unit, 22 ... first reception circuit, 23 ... transmission circuit as response request signal output means, 24 ... second circuit as reception means
Receiving circuit, 26: microcomputer (microcomputer) as control means, 32: door lock drive device, 33: alarm device as alarm means.

Claims (3)

[Claims] 1. A door key for outputting a radio signal, a communication control device disposed in a vehicle for locking and unlocking a door based on the radio signal when the radio signal is received, and a door locked based on the radio signal. The vehicle door unlocking device further comprising: an alarm unit that generates an alarm by driving the door lock on condition that the door lock is unlocked by an operation other than the locking operation by the wireless signal. When receiving a response request signal from the communication control device, the communication control device automatically outputs a response signal in response to the response request signal, and the communication control device outputs the response request signal to a predetermined area in the vehicle interior. Output means, receiving means for receiving a response signal from the door key transmitted in response to the response request signal, and prohibiting driving of the alarm means when receiving the response signal The vehicle unlocking apparatus characterized by a control unit. 2. The vehicle according to claim 1, wherein the door key includes a transponder control unit that generates an electromotive force based on the response request signal and automatically outputs the response signal based on the electromotive force. Locking and unlocking device. 3. The vehicle locking / unlocking device according to claim 1, wherein the control unit sets the engine in a startable state only while receiving a response signal from the door key.