JPH06144158A - Theft preventing device for vehicle - Google Patents

Abstract

PURPOSE:To improve the safety against a theft by providing a theft preventing control circuit capable of taking a warning action when the illicit action state is detected while allowing an unlocking action via the rotating action of a key in the alert mode. CONSTITUTION:When the unlocking signal from the remote transmitting circuit 15 of an IG key 43 is received or the identification code is inputted by the rotating action of the IG key 13 inserted into the key cylinder of a door is inputted in the alert mode, a theft preventing control circuit 11 feeds the unlocking signal to a door control circuit 24 to perform the unlocking action of a door locking mechanism 22 and releases the alert mode. When the unlocking action of the door locking mechanism 22 is performed by an illicit action, an alarm is outputted to a warning device 26, a warning action is taken to the outside of a vehicle, and the safety against a theft is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention receives a lock signal or a lock signal from a door lock mechanism and a remote operation means for performing a lock operation and a lock operation by rotating a key inserted in a key cylinder of a door. The present invention relates to a vehicle antitheft device for a vehicle having a door lock control device that causes a door lock mechanism to perform a locking operation or an unlocking operation.

[0002]

2. Description of the Related Art For example, in an automobile as a vehicle,
Generally, for the door lock mechanism provided on the door,
The ignition key is inserted into the key cylinder of the door and is rotated to the locking side or the unlocking side to mechanically perform the locking operation or the unlocking operation. Also,
For example, in the door lock mechanism provided on the door on the driver's side, in response to the turning operation of the key cylinder, the lock mechanism of each other door is driven by an electric means such as a solenoid or a motor to perform a locking operation or an unlocking operation. There is a configuration in which a door control device for performing an operation is provided.

Further, in recent years, there is a door control device provided with a receiving device so that a door lock mechanism can perform a locking operation or an unlocking operation by a radio signal from the outside. This is because, for example, a small remote transmission circuit is incorporated in the key grip part of the ignition key, and the unlocking signal or the locking signal can be transmitted by a radio wave signal. In response to this, an unlocking signal or a locking signal is given to the door control device to cause the lock mechanism to perform the unlocking operation or the locking operation.

By the way, in an automobile having a door lock mechanism as described above, the lock key can be mechanically unlocked by inserting the ignition key into the key cylinder of the door and rotating the ignition key. Therefore, for example, even if the key cylinder of the door is rotated by a fraudulent act, the unlocking operation is performed, and the safety against theft is impaired.

Therefore, conventionally, even in a vehicle having a door lock mechanism as described above, the door lock mechanism is unlocked by a fraudulent act by attaching the antitheft control device 1 as shown in FIG. When the is opened, it is considered to improve the safety against theft by outputting an alarm to the outside.

That is, in FIG. 7, an anti-theft control device 1 operating as will be described later has a receiving circuit for receiving a radio wave signal from a remote transmitting circuit 2a built in the ignition key 2 via an antenna 1a. Detection signals are input from various switches. That is, a key position for detecting the presence or absence of an ignition switch (hereinafter referred to as an IG switch) 3 and an ignition key (hereinafter referred to as an IG key) 2 provided on an ignition key cylinder is provided at each input terminal of the anti-theft control device 1. The switch 4 is connected, and the door courtesy switch 5 and the lock position switch 6 provided on the door are also connected.

A door control circuit 8 capable of electrically driving and controlling the door lock mechanism 7 is provided with a signal from a key interlock switch 9 which is switched in response to a turning operation of a key cylinder of a driver side door or a vehicle interior (not shown). Depending on the switch operation, the motor 8a is energized to turn on the door lock mechanism 7 for all doors.
Is electrically driven to perform a locking or unlocking operation, and a signal is also given from the anti-theft control device 1. Also, an alarm device 10 for issuing an alarm is connected to the anti-theft control device 1, and is configured to perform an alarm operation according to an alarm output from the anti-theft control device 1.

Now, the antitheft control device 1 is, for example, I
When the warning mode is set based on the detection signals from the G switch 3, the key position switch 4, the door courtesy switch 5, and the lock position switch 6, when the unlock signal from the remote transmission circuit 2a of the IG key 2 is received. Only, an unlocking signal is given to the door control circuit 8 to drive the motor 8a to cause the door lock mechanism 7 to perform the unlocking operation and release the warning mode.

In this case, the radio signal transmitted from the remote transmission circuit 2a includes an identification code set uniquely to each vehicle, and the anti-theft control device 1 determines that the identification codes match. It is specified that the signal is a radio signal from the remote transmission circuit 2a owned by the user. Therefore, for example, if the identification code is set as a coded signal having a plurality of digits, the number of combinations increases as the number of digits increases, so that the security against theft can be further improved.

In the anti-theft mode, the anti-theft control device 1 opens the door when, for example, the door lock mechanism 7 is unlocked by inserting a foreign substance into the key cylinder of the door. If the door is opened due to an illegal act, an alarm output is given to the alarm device 10 to perform an alarm operation. Examples of the alarm operation include sounding a horn, blinking a headlight, or transmitting an alarm signal to an external receiver by a radio signal, which is intended to prevent an unauthorized intruder into the vehicle. is there.

By the way, in the above case, if the alarm mode is released only when the anti-theft control circuit 1 receives the radio signal from the remote transmission circuit 2a, the remote transmission circuit 2a may cause some trouble. Alternatively, even if the battery is inoperable due to the life of the built-in battery, if the user directly unlocks the door lock mechanism 7 with the IG key 2, an alarm operation will be performed when the door is opened. Therefore, some kind of remedy is needed.

Therefore, conventionally, as a remedy in such a case, even if the unlock signal from the remote transmission circuit 2a is not accepted, the user operates the IG key 2 to directly unlock the door lock mechanism 7. A configuration that allows opening the door is being considered. That is, when the door is opened after the door lock mechanism 7 is unlocked, at that time, the anti-theft control device 1 does not immediately issue an alarm and waits for a predetermined time (for example, 10 to 30 seconds). During this time, if the user inserts the IG key 2 into the ignition key cylinder and sets it to the ACC position,
The warning state is released based on the detection signal from the IG switch 3.

As a result, a user who possesses the legitimate IG key 2 can release the warning mode even when the door lock mechanism 7 is directly unlocked, and an intruder illegally opens the door. In the case of being stolen, an alarm operation can be performed after a predetermined time, so that the safety against theft can be improved while providing a relief measure.

[0014]

However, in the conventional configuration as described above, in the warning mode set by the anti-theft control device 1, the direct door lock mechanism 7 is directly operated because of the provision of the above-mentioned remedy. When the door is opened after the unlocking operation, the alarm operation is performed after waiting for a predetermined time. Therefore, there is a possibility that the vehicle may be intruded during this time and illegal acts may be performed.

However, as the standby time set in that case, it is necessary to estimate the time required for the user to open the door and insert the IG key 2 into the ignition to release the warning mode and set the ACC key to the ACC position. Because there is
There are circumstances where it cannot be set shorter than a certain amount.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to release the alarm mode by rotating the key to unlock the door lock mechanism in the alarm mode. With the above configuration, it is possible to provide an antitheft device for a vehicle that can immediately issue an alarm to the outside upon detecting a fraudulent activity state and can further improve safety against theft.

[0017]

A vehicle antitheft device of the present invention comprises a door lock mechanism for performing an unlocking operation and a locking operation by rotating a key inserted in a key cylinder of a door, and a remote operating means. It is intended for a vehicle equipped with a door lock control device that causes the door lock mechanism to perform a locking operation or an unlocking operation based on a locking signal or an unlocking signal of the key cylinder. A switch, a storage means for storing an identification code uniquely set to the vehicle, an alarm means for giving an alarm to the outside of the vehicle, and a warning mode set in a locked state of the door lock mechanism are illegal. When an action state is detected, an alarm output is given to the alarm means, and when an unlocking signal is received from the remote operation means or a detection signal from the rotary switch Force characterized in was constructed by providing the anti-theft control means for canceling the warning mode causes perform unlocking operation on the door lock control device only when it matches with the identification code.

Further, in the above-mentioned vehicle, a rotation switch for detecting rotation of the key cylinder to the unlocking side and the locking side, a key detecting means for detecting insertion of the key into the key cylinder, and the vehicle. Storage means for storing a uniquely set identification code, warning means for giving an alarm to the outside of the vehicle, and unlocking of the door lock mechanism in a warning mode set in the locked state of the door lock mechanism State or an open state of the door is detected, an alarm output is given to the alarm means, and when an unlock signal is received from the remote operation means or a rotation detection signal to the lock side of the rotary switch and the key detection means. Only when the input in combination with the detection signal coincides with the identification code, the door lock control device is caused to perform the unlocking operation and the warning mode is released. That anti-theft control unit and may be configured by providing a.

Further, a driver side door lock mechanism for performing an unlocking operation and a locking operation by rotating a key inserted in a key cylinder of the driver side door, and an unlocking operation provided on another seat side door Other seat side door lock mechanism for performing a locking operation, and the driver seat side and other parts based on a locking signal or an unlocking signal from the remote operation means or in response to the unlocking operation or the locking operation of the driver side door. In the case of a vehicle equipped with a door lock control device that causes the seat side door lock mechanism to perform a locking operation or an unlocking operation, a rotary switch for detecting the rotation of the key cylinder to the unlocking side and the locking side. A storage means for storing an identification code set uniquely to the vehicle, an alarm means for giving an alarm to the outside of the vehicle, and a lock state of the door lock mechanism on the driver side and the other side of the seat. In the warning mode set by, when the open state of the door is detected, an alarm output is given to the alarm means, when an unlock signal is received from the remote operation means, or the locking side and the unlocking side of the rotary switch. And a theft prevention control means for causing the door lock control device to perform the unlocking operation and canceling the warning mode only when the input by the combination of the rotation detection signals to the identification code coincides with the identification code. You can also

In this case, a key detecting means for detecting the insertion of the key into the key cylinder is provided, and the door lock control device operates the unlocking operation in the state where the detection signal is given from the key detecting means. It is preferable to configure so as to prohibit.

Further, a key detecting means for detecting the insertion of the key into the key cylinder is provided, and the anti-theft control means operates the door when the detection signal is given from the key detecting means in the warning mode. The lock control device may be configured to prohibit the unlocking operation.

[0022]

According to the vehicle antitheft device of claim 1,
In the security mode, the anti-theft control means is a door lock control device when the unlock signal is received from the remote operation means or when the input of the detection signal from the rotary switch matches the identification code stored in the storage means. The unlocking operation is performed, the warning mode is released, and when a state in which an illegal act other than this is performed is detected, an alarm output is given to the alarm means to give an alarm to the outside of the vehicle. This enables the key to unlock even if the remote operation means fails to transmit the unlock signal, and outputs an alarm immediately when an unauthorized entry into the vehicle occurs. As a result, the security against theft is improved.

According to the vehicle anti-theft device of the second aspect, the anti-theft control means rotates the rotary switch to the locking side when the unlock signal is received from the remote operation means in the warning mode. When the input by the combination of the signal and the detection signal of the key detection means coincides with the identification code stored in the storage means, the door lock control device is caused to perform the unlocking operation and the warning mode is released, and the other method is used. When the door lock mechanism is released or the open state of the door is detected, an alarm output is given to the alarm means to give an alarm to the outside of the vehicle.

In this case, when the identification code is inputted by the key, the operation of inserting the key into the key cylinder and the operation of rotating to the locking side is combined, so that the door lock mechanism is caused to perform the unlocking operation. Alternatively, the warning mode can be released without opening the door, and when an illegal act is detected, it can be immediately detected and an alarm operation can be performed.

According to the vehicle anti-theft device of the third aspect, the anti-theft control means, when in the warning mode, receives an unlocking signal from the remote operating means, or the locking side and the unlocking side of the rotary switch. When the input by the combination of the turning signals to the door coincides with the identification code stored in the storage means, the door lock control device is caused to perform the unlocking operation and the warning mode is released. When the door is opened when the unlocking operation is performed, an alarm output is given to the alarm means to give an alarm to the outside of the vehicle.

In this case, when the identification code is input by the key, the key is inserted into the key cylinder and the combination of the turning operation to the locking side and the unlocking side is performed. Therefore, the key is inserted into the key cylinder. The input operation of the identification code can be continuously performed as it is.

According to the vehicle antitheft device of the fourth aspect, in the above case, when the key detecting means detects that the key is inserted in the key cylinder, in this state, the door lock control device causes the door lock control device to operate. The unlocking operation for the lock mechanism is prohibited. Therefore, when the identification code is input by the key inserted in the key cylinder, the unlocking operation by the door lock control device is not performed, and other door lock mechanisms are not electrically locked or unlocked. .

According to the vehicle antitheft device of the fifth aspect, in the above-mentioned case, when the key detection means detects that the key is inserted in the key cylinder, in this state, the antitheft control means causes the antitheft control means to operate. The unlocking operation by the lock control device is prohibited. Therefore, when the identification code is input by the key inserted in the key cylinder, the unlocking operation by the door lock control device is not performed, and the other door lock mechanism does not electrically repeat the locking operation or the unlocking operation. .

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. That is, in FIG. 1 showing an electrical block configuration, an anti-theft control circuit 11 as an anti-theft control unit has a CPU 11a, a ROM 11b as a storage unit, a RAM 11c, and a receiving circuit 11d. In this case, ROM1
In 1b, a unique identification code set for each vehicle is stored and a security program as described later is stored. Further, the receiving circuit 11d is adapted to receive a radio signal from the outside received via the antenna 12.

The ignition key (hereinafter abbreviated as IG key) 13 comprises a key plate 13a having a key groove and a key grip portion 13b for supporting the key plate 13a. The key grip portion 13b has a lock switch 14a. Further, an unlock switch 14b is provided, and a remote transmission circuit 15 as a remote transmission means for transmitting a lock signal and an unlock signal as a radio wave signal is provided inside. Then, the remote transmission circuit 15 sends a lock signal or an unlock signal containing the identification code set corresponding to the target automobile to the lock switch 14a or the unlock switch 14b.
It is designed to be transmitted according to the operation input of.

An ignition switch (hereinafter abbreviated as IG switch) 16 and a key position switch 17 are provided on an ignition key cylinder (not shown) provided in the driver's seat portion. The IG switch 16 is an IG key 13 inserted in an ignition key cylinder.
Is a switch for detecting whether the switch is turned to the OFF position, the ACC position, the ON position or the ST (start) position, and the key position switch 1
Reference numeral 7 is a switch for detecting whether or not the IG key 13 is inserted in the ignition key cylinder. Then, the IG switch 16 and the key position switch 1
7 are connected to input terminals A and B of the anti-theft control circuit 11, respectively.

Next, in the door portion, a shutter provided at the entrance of a key cylinder (not shown) is provided with a shutter switch 18 as a key detecting means for detecting the insertion of the IG key 13 or the like. A rotary switch 19 for detecting that the key cylinder is rotated in the locking direction or the unlocking direction by the inserted IG key 13 or the like is provided. The shutter switch 18 and the rotation switch 19 are connected to the input terminals C and D of the anti-theft control circuit 11, respectively.

Further, a door courtesy switch 20 which is turned on / off according to the opening / closing of the door is provided on the door, and
A lock position switch 21 for detecting the locked state of the door is provided. The door courtesy switch 20 and the lock position switch 21 are connected to the input terminals E and F of the anti-theft control circuit 11, respectively.

The door lock mechanism 22 for locking and unlocking the door includes an IG key 13 inserted in a door key cylinder.
When is rotated, it is mechanically driven in conjunction with this to perform a locking operation or a locking operation. A motor 23 is provided in the drive unit of the door lock mechanism 22, and the door lock mechanism 22 is electrically configured to be unlocked and locked.

The door control circuit 24 as a door lock control device drives and controls various loads arranged on the door, and is also connected to the motor 23 to provide a drive output. The input terminal of the door control circuit 24 is connected to the output terminal P of the anti-theft control circuit 11, and when an operation command signal for locking and unlocking is given, either the forward or reverse of the motor 23 is energized. The door lock mechanism 22 is adapted to perform a locking operation or an unlocking operation. When the door control circuit 24 receives a locking or unlocking signal from a key interlock switch 25 which is turned on and off in conjunction with the rotation of the door key cylinder in the locking direction and the unlocking direction, the motor 23 is driven based on this signal. Energization control is performed, and further, the motor 2 is responsive to a signal from a lock switch provided in the vehicle compartment.
3 is controlled so that the door lock mechanism 22 performs a locking operation and an unlocking operation. Also,
Although not shown, the door control circuit 24 is adapted to receive detection signals from the respective switches for performing other controls.

The alarm device 26 as an alarm means is, for example, a horn provided in an automobile, and includes an antitheft control circuit 1
It is connected to the output terminal Q of No. 1 and sounds when an alarm output is given. The alarm device 26 is not limited to a horn, and may be a circuit that causes a headlight to blink, or may be a transmitter that transmits an alarm signal by a radio signal to the outside, and these are used together. You may comprise by a combination.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 2 and the time chart of FIG. That is, the CPU 11 of the antitheft control circuit 11
a is for performing control according to the flowchart of the security program shown in FIG.
At 1, it is determined whether the warning mode is set. The alert mode is a state in which an unauthorized intruder is monitored and alerted when a user is absent, and specifically, for example, the following three conditions are set. There is. The CPU 11a detects that the IG key 13 is pulled out from the ignition key cylinder by a detection signal from the key position switch 17, and detects that all doors are closed by a detection signal from the door courtesy switch 20, Then, the detection signal from the lock position switch 21 is used to detect that the door lock mechanism 22 is in the locked state, and the condition is set according to these conditions.

When the warning mode is set in step S1, the CPU 11a proceeds to step S1.
It shifts to 2 and determines whether the unlock signal is transmitted from the remote transmission circuit 15 of the IG key 13. in this case,
When the unlock switch 14b of the IG key 13 is pressed, the remote transmission circuit 15 transmits an unlock signal as a radio wave signal. The unlock signal from the remote transmission circuit 15 is input to the reception circuit 11d via the antenna 12, demodulated in the reception circuit 11d, converted into a digital signal, and then given to the CPU 11a.

When the identification code of the digital signal input from the receiving circuit 11d matches the identification code stored in the ROM 11b, the CPU 11a accepts the signal and when the signal is the unlock signal. "YE
S "is determined and the process proceeds to step S3. Then, in step S3, the CPU 11a gives an unlock signal to the door control circuit 24 and cancels the warning mode, and thereafter returns to step S1. As a result, the door control circuit 24 energizes the motor 23 to cause the door lock mechanism 22 to perform the unlocking operation.

Therefore, when the correct unlocking signal is transmitted from the remote transmission circuit 15 of the IG key 13 by the radio wave signal, the door is unlocked from the locked state, and the warning mode is released. No alarms are output.

When the unlock signal from the remote transmission circuit 15 is not input in step S2, the CPU 11a determines "NO" and determines in step S4.
Move to. Here, the CPU 11a determines whether or not the IG key 13 or the like is inserted into the key cylinder of the door based on the detection signal from the shutter switch 18. Then, if there is a detection signal, it is determined to be "YES" and the process proceeds to step S5, and if it is not, it is determined to be "NO" and the process proceeds to step S6.

In step S5, the CPU 11a determines "YES" when the correct identification code is input by the turning operation of the IG key 13 as will be described later, shifts to step S3, and the door is opened as described above. The unlock signal is given to the control circuit 24 and the warning mode is released. The CPU 11a also executes step S5.
If the correct identification code is not entered in,
When it is determined to be "NO", the process proceeds to step S6.

When the CPU 11a detects that the door is opened by the detection signal from the door courtesy switch 20 in step S6, "YES".
Then, the process proceeds to step S7, and an alarm output is given to the alarm device 26 to perform an alarm operation to the outside. Therefore, when the door lock mechanism 22 is unlocked through the proper procedure, that is, step S2 or step S
When it is determined to be "YES" in step 5 and the door lock mechanism 22 is unlocked by moving to step S3, the warning mode is released, but the door lock mechanism 22 is unlocked by some illegal method. When the door is opened after the lock operation is performed, it is regarded as a fraudulent state and the alarm operation is performed.

Now, a method of inserting the IG key 13 into the key cylinder of the door and inputting the identification code by rotating the IG key 13 will be described. Here, a case where the identification code is set to, for example, a two-digit number “23” will be described as an example.

That is, as a procedure for inputting the identification code "23", the IG key 13 is inserted into the key cylinder of the door, and the IG key 13 is turned in the locking direction in correspondence with the upper digit "2". The IG key 13 is once removed from the key cylinder and then reinserted, and the IG key 13 is rotated three times in the locking direction corresponding to the lower digit "3". The rear IG key 13 is removed from the key cylinder, and the process ends.

On the other hand, when the identification code is input by the IG key 13 in this way, the CPU 11a causes the shutter switch 18 and the rotary switch 1 as shown in FIG.
According to the detection signal from 9, the discrimination is performed as follows. First, as shown in FIG. 3 (a), the shutter switch 18 is turned on to turn the IG key 13 into the key cylinder of the door.
Is detected, and as shown in (b) of the figure, the input of the rotation signal from the rotary switch 19 to the locking side is counted within a predetermined time. When the IG key 13 is removed from the key cylinder and the shutter switch 18 is turned off, the CPU 11a determines that the input of the rotation signal to the locking side is completed, fixes the count number, and stores it as the input number of the upper digit. Like

In the same manner, when the count number of the rotation signal from the rotary switch 19 to the locking side according to the lower digit is determined within a predetermined time, the input identification code is stored in the ROM.
It is determined whether or not it coincides with the identification code "23" stored in 11b, and if it coincides, it is determined as "YES" in step S5 and the door control circuit as described above. The unlocking signal is given to 24 and the warning mode is released. When the identification code is input, the IG key 13 is not rotated to the unlocking side, so that the rotation signal from the rotary switch 19 to the unlocking side is generated as shown in FIG. It is never entered.

As described above, in the present embodiment, the anti-theft control circuit 11 opens the door from the state in which the door lock mechanism 22 is unlocked by the fraudulent act which does not go through the proper procedure in the warning mode. The alarm code is immediately issued at this point, and the identification code is input when the unlock signal is received from the remote transmission circuit 15 or when the IG key 13 inserted in the key cylinder of the door is rotated to the lock side. Only at this time, the unlocking operation of the door lock mechanism 22 and the release of the warning mode are performed.

Thus, in the alert mode, even when the user inserts the IG key 13 directly into the key cylinder of the door and inputs the identification code to cause the door lock mechanism 22 to perform the unlocking operation, the identification code is used. When the door is input, the alarm mode is not released when the door lock mechanism 22 is mechanically unlocked due to a fraudulent action, and the alarm operation is immediately performed when the door is opened. It becomes possible to improve the security against theft.

In the above embodiment, step S6
Although the alarm operation is performed on the condition that the door is opened, the present invention is not limited to this, and the alarm operation is performed on the condition that the door lock mechanism 22 is mechanically unlocked. Is also good. This is because, in the above embodiment, when the identification code is input by the IG key 13, the door lock mechanism 22 is not mechanically unlocked because the door lock mechanism 22 is not rotated to the unlock side. .

FIG. 4 shows a second embodiment of the present invention. Hereinafter, parts different from the first embodiment will be described. That is, in the first embodiment, the identification code is input by the IG key 13 in the warning mode by rotating the IG key 13 inserted in the key cylinder of the door only to the locking side. In the example, with the IG key 13 still inserted in the key cylinder, the IG key 13 is rotated to the locking side and the unlocking side to input the identification code.

That is, here, the case where the identification code is set to, for example, a four-digit number "9053" will be described as an example. First, insert the IG key 13 into the key cylinder of the door, and in response to the digit "9" of the thousand digit, the IG key 13
Is rotated 9 times to the locking side, and then the IG key 13 is rotated 10 times to the unlocking side in response to the digit “0” of 100 digits. After turning the IG key 13 to the locking side five times corresponding to the digit "5" of the digit, the IG key 13 is moved to the unlocking side in response to the digit "3" of the one digit. The rotation operation is performed three times, the IG key 13 is removed from the key cylinder, and the input operation ends.

On the other hand, when the identification code is input by the IG key 13 in this way, the CPU 11a responds to the detection signal from the rotary switch 19 as shown in FIG.
The determination is made as follows. First, the shutter switch 1
When the switch 8 is turned on, the insertion of the IG key 13 into the key cylinder of the door is detected (see FIG. 4A), and the detection signal from the rotary switch 19 is accepted. And CPU
11a counts the input of the rotation signal from the rotation switch 19 to the locking side (see FIG. 11B),
Then, when a rotation signal to the unlocking side is input from the rotation switch 19 (see (c) in the same figure), it is considered that the input of the rotation signal to the locking side is finished at that time and the rotation side of the rotation switch 19 is locked. The count value of the rotation signal to the memory is stored, and the input of the rotation signal to the unlocking side is continuously counted.

Thereafter, similarly, the CPU 11a stores the count value at the time when the rotation signal from the rotation switch 19 is switched from the unlocking side to the locking side or vice versa, and finally the IG key 13 is operated. When removed from the key cylinder, the input count value of the last digit is fixed and stored. Then, when the count value input in this way matches the identification code stored in the ROM 11b, the CPU 11a comes to cancel the warning mode.

In this case, since the IG key 13 is rotated in the unlocking direction when the identification code is input by the IG key 13, the door interlocking switch 25 is switched during the input operation. So, the door control circuit 2
4, the door lock mechanism 22 is unlocked. However, if the door is opened before inputting the identification code at that time, the CPU 11a immediately performs the alarm operation because the identification codes being input do not match.

Accordingly, when the key cylinder of the door is rotated in the unlocking direction to cause the door lock mechanism 22 to be unlocked by an illegal act, since the warning mode is not released, the door is opened when the door is opened. The alarm operation can be immediately performed, and the same effect as that of the first embodiment can be obtained in the second embodiment.

Further, in the present embodiment, the IG key 13
When the identification code is input by inserting the key into the key cylinder of the door, unlike the first embodiment, the input operation of the identification code can be continuously performed with the IG key 13 still inserted. For example, even when the number of digits of the identification code is large, the input operation becomes easy.

FIG. 5 shows the third embodiment of the present invention, and the portions different from the second embodiment will be described. That is, in the above-described second embodiment, when the IG key 13 is inserted into the key cylinder of the door and the identification code is input, when the IG key 13 is rotated to the unlocking side or the locking side, The door interlocking switch 25 is switched in conjunction with each other, and the door control circuit 24 causes the door lock mechanism 22 of all doors to perform an unlocking operation or a locking operation. This does not reduce the safety against theft as described above, but in the present embodiment, unnecessary power consumption for locking and unlocking the door lock mechanism 22 in such a case and power consumption This is to eliminate the offensive sound.

That is, in FIG. 5, the movable contact 25a of the key interlocking switch 25 is grounded, and the locking side terminal 25b and the unlocking side terminal 25c are the locking side input terminal A and the unlocking side input of the door control circuit 24, respectively. It is connected to terminal B. When the key cylinder of the door is rotated to the lock side, the movable contact 25a becomes conductive with the lock side terminal 25b, and the door control circuit 24 is turned on.
When a signal of "L" level is given to the input terminal A of and the key cylinder of the door is rotated to the unlocking side, the movable contact 25a
Is in a conductive state with the unlocking side terminal 25c, and applies an "L" level signal to the input terminal B of the door control circuit 24.

On the other hand, the shutter switch 18 provided in the key cylinder of the door is turned on when the IG key 13 or the like is inserted into the key cylinder, and gives a signal to the input terminal C of the anti-theft control circuit 11 to the ground potential. It is like this. In the anti-theft control circuit 11, the input circuit 27 is provided on the path from the input terminal C to the input terminal of the CPU 11a. Although the input circuit 27 is shown in FIG. 5, other input circuits are omitted.

In the input circuit 27, the input terminal C has a diode 28 and a resistor 29 for blocking the reverse current having the polarities shown in the figure.
Connected to the input terminal of the CPU 11a via a resistor 28, a common connection point between the diode 28 and the resistor 29 is connected via a resistor 30 to a power source terminal 31 of a 12V battery, for example, and a ground via a Zener diode 32 having the polarity shown in the figure. Has been done. The input terminal of the CPU 11a is grounded via the capacitor 33.

Further, the lock signal output terminal a of the CPU 11a
Is connected to an output terminal P1 via an output circuit 34 including a transistor, a resistor and a Zener diode, and the output terminal P is connected to an input terminal A of the door control circuit 24. Further, the input terminal C of the anti-theft control circuit 11 is connected to the output terminal P via the diode 35 of the illustrated polarity.
Connected to 1. Therefore, the shutter switch 1
When the switch 8 is turned on, a signal of "L" level is directly applied to the input terminal A of the door control circuit 24 through the input terminal C and the output terminal P1.

The unlock signal output terminal b of the CPU 11a is connected to the output terminal P2 via the output circuit 36 including a transistor, a resistor and a Zener diode.
The output terminal P2 is connected to the input terminal B of the door control circuit 24.

The door control circuit 24 not only controls the drive of the door lock mechanism 22, but also controls the other loads arranged on the door.
Key position switch 17, door courtesy switch 2
0 and the lock position switch 21 are connected.

According to this structure, when the anti-theft control circuit 11 sets the warning mode, when the IG key 13 is inserted into the key cylinder of the door to input the identification code, the IG key Since the shutter switch 18 is turned on by inserting the key 13, the input terminal C, the diode 35, and the output terminal P of the anti-theft control circuit 11 are turned on.
1, the input terminal A of the door control circuit 24 is set to the "L" level.

As a result, the door control circuit 24
Holds the door lock mechanism 22 in the locked state during the period when the signal of the "L" level is given from the input terminal A. During this period, the IG key 13 is rotated to the unlocking side to operate the key. Even when the interlock switch 25 is turned on and off,
Regardless of this, the locked state of the door lock mechanism 22 is maintained.

Therefore, even when the IG key 13 is rotated to the locking side and the unlocking side when the identification code is input,
The power consumption for driving the door lock mechanism 22 can be eliminated and the operation noise can be eliminated, and the operation feeling for the user can be improved.

FIG. 6 shows a fourth embodiment of the present invention. The difference from the third embodiment is that in the third embodiment, the input terminal C and the output terminal P1 of the anti-theft control circuit 11 are shown. In the present embodiment, a signal of "L" level to the input terminal A of the door control circuit 24 is given by the output signal of the CPU 11a. I have just done it.

That is, the CPU of the anti-theft control circuit 11
When the IG key 13 is inserted in the key cylinder and the detection signal is input from the shutter switch 18 in the setting mode of the warning mode, the security program causes the output circuit 11a to output the detection signal. Three
4, a lock signal, that is, an "L" level signal is applied to the input terminal A of the door control circuit 24.

As a result, the door control circuit 24 comes to hold the door lock mechanism 22 in the locked state,
When the identification code is input by the IG key 13, even if the key cylinder is rotated to the unlocking side, the door lock mechanism 22 is prevented from performing the unlocking operation. As a result, according to the present embodiment. Also, the same effect as that of the third embodiment can be obtained.

In each of the above embodiments, the unlocking operation or the locking operation of the door lock mechanism 22 is performed by driving the motor 23, but the invention is not limited to this.
For example, the solenoid may be energized to perform the unlocking operation and the locking operation.

[0072]

As described above, according to the vehicle antitheft device of the present invention, the following excellent effects can be obtained. That is, according to the vehicle anti-theft device of the first aspect, the anti-theft control unit stores the detection signal input from the remote operation unit or the input of the detection signal from the rotary switch in the alert mode. When it matches the identification code stored in the means, the door lock control device performs the unlocking operation and the warning mode is released. When a fraudulent state is detected, an alarm output is given to the alarm means to give an alarm to the outside of the vehicle. As a result, even if the remote operation means fails to transmit the unlocking signal, it can be unlocked by inserting the key into the key cylinder and rotating it. When an illegal intrusion is attempted, an alarm can be immediately output, which has an excellent effect of improving safety against theft.

According to the vehicle anti-theft device of the second aspect, the anti-theft control means can prevent
The door is received when an unlocking signal is received from the remote operation means, or when an input by a combination of a rotation signal to the locking side of the rotary switch and a detection signal of the key detection means matches the identification code stored in the storage means. When the lock control device is unlocked and the warning mode is released, and if the door lock mechanism is released or the open state of the door is detected by any other method, an alarm output is given to the alarm means and output outside the vehicle. Since it is configured to warn, even if the identification code is input by rotating the key due to a malfunction of the remote operation means, the door lock mechanism should not be unlocked and the warning mode should be released. Therefore, when the door lock mechanism is unlocked due to a fraudulent act, an alarm will be issued immediately at that time or when the door is opened. It is possible to perform the work, an excellent effect that it is possible to improve the security against theft.

According to the vehicle anti-theft device of the third aspect, the anti-theft control means can prevent
When the unlocking signal is received from the remote operation means, or when the input by the combination of the rotation signals to the locking side and the unlocking side of the rotary switch matches the identification code stored in the storage means, the door lock control device is displayed. When the door lock mechanism is unlocked by any other method, an alarm output is given to the alarm means to give an alarm to the outside of the vehicle. With this configuration, while improving safety against theft, even when the identification code is input by rotating the key due to a malfunction of the remote operation means, etc., it is continuously identified with the key inserted in the key cylinder. It has an excellent effect that a code input operation can be performed.

According to the vehicle anti-theft device of the fourth aspect, the key detecting means detects that the key is inserted into the key cylinder, and in the detected state, the door lock control device detects the solution to the door lock mechanism. The lock operation is prohibited, and the vehicle antitheft device according to claim 5 detects that the key is inserted into the key cylinder by the key detection means, and in the detected state, the theft is detected. Since the unlocking operation by the door lock control device is prohibited by the prevention control means, even when the key inserted in the key cylinder is rotated to the lock side and the unlock side to input the identification code, The door lock mechanism can be held in the locked state by the lock control device or the anti-theft control means. Therefore, when the identification code is input, the other door lock mechanism is turned on. Manner prevents repeated locking operation or unlocking operation, an excellent effect that it is possible to eliminate the wasteful power consumption and harsh operation sound caused by the locking operation or unlocking operation.

[Brief description of drawings]

FIG. 1 is an electrical block diagram showing a first embodiment of the present invention.

[Figure 2] Security program flowchart

FIG. 3 is a time chart when inputting an identification code

FIG. 4 is a diagram corresponding to FIG. 3 showing a second embodiment of the present invention.

FIG. 5 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 6 is a diagram corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 7 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

11 is an anti-theft control circuit (theft prevention control means), 11a
Is a CPU, 11b is a ROM (storage means), 11d is a reception circuit, 13 is an ignition key, 15 is a remote transmission circuit (remote transmission means), 16 is an ignition switch, 17 is a key position switch, and 18 is a shutter switch (key detection). Means), 19 is a rotary switch, 20
Is a door courtesy switch, 21 is a lock position switch, 22 is a door lock mechanism, 23 is a motor, 24 is a door control circuit (door lock control device), and 26 is an alarm device (alarm means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Mizuno No. 1 Noda, Toyoda, Oguchi-cho, Niwa-gun, Aichi Prefecture Tokai Rika Electric Co., Ltd.

Claims (5)

[Claims] 1. A door lock mechanism for performing an unlocking operation and a locking operation by rotating a key inserted in a key cylinder of a door, and the door locking mechanism based on a locking signal or an unlocking signal from a remote operation means. In a vehicle equipped with a door lock control device for performing a locking operation or an unlocking operation, a rotation switch for detecting rotation of the key cylinder, a storage unit for storing an identification code uniquely set for the vehicle, In the alarm mode for issuing an alarm to the outside of the vehicle and in the alarm mode set by the locked state of the door lock mechanism, a fraudulent state is detected and an alarm output is given to the alarm unit, and the remote operation unit is operated. Only when the unlock signal is received or when the input of the detection signal from the rotary switch matches the identification code, the door lock control device is Anti-theft device, characterized in that provided with the anti-theft control means for canceling the warning mode causes perform unlocking operation. 2. A door lock mechanism for performing an unlocking operation and a locking operation by rotating a key inserted in a key cylinder of a door, and the door locking mechanism based on a locking signal or an unlocking signal from a remote operating means. In a vehicle equipped with a door lock control device for performing a locking operation or an unlocking operation, a rotation switch for detecting rotation of the key cylinder to an unlocking side and a locking side, and insertion of the key into the key cylinder. A key detecting means for detecting a key, a storage means for storing an identification code set uniquely to the vehicle, an alarm means for giving an alarm to the outside of the vehicle, and a warning set in a locked state of the door lock mechanism. In the mode, the unlocked state of the door lock mechanism or the opened state of the door is detected and an alarm output is given to the alarm means, and the remote operation means is operated. The door lock control device is unlocked only when an unlock signal is received or when an input by a combination of a rotation detection signal to the locking side of the rotary switch and a detection signal of the key detection means matches the identification code. An anti-theft device for a vehicle, comprising: anti-theft control means for performing a locking operation and releasing the warning mode. 3. A driver's seat side door lock mechanism for performing an unlocking operation and a locking operation by rotating a key inserted in a key cylinder of a driver's seat side door, and an unlocking operation provided on another seat side door. Other seat side door lock mechanism for performing a locking operation, and the driver seat side and other parts based on a locking signal or an unlocking signal from the remote operation means or in response to the unlocking operation or the locking operation of the driver side door. In a vehicle equipped with a door lock control device that causes a seat side door lock mechanism to perform a locking operation or an unlocking operation, a rotary switch that detects rotation of the key cylinder to an unlocking side and a locking side, and a unique to the vehicle Storage means for storing the identification code set for the vehicle, an alarm means for giving an alarm to the outside of the vehicle, and a warning set in a locked state of the door lock mechanism on the driver's seat side and the other seat side. In the mode, the open state of the door is detected, an alarm output is given to the alarm means, and when the unlock signal is received from the remote operation means or the rotation detection of the rotary switch to the locking side and the unlocking side is detected. A vehicle theft, comprising: an antitheft control unit that causes the door lock control device to perform an unlocking operation and releases the warning mode only when an input by a combination of signals matches the identification code. Prevention device. 4. A key detection means for detecting insertion of the key into the key cylinder is provided, and the door lock control device prohibits the unlocking operation in a state where a detection signal is given from the key detection means. The anti-theft device for a vehicle according to claim 3, wherein 5. A key detection means for detecting the insertion of the key into the key cylinder is provided, and the anti-theft control means is configured to operate the door when the detection signal is given from the key detection means in the warning mode. The antitheft device for a vehicle according to claim 3, wherein an unlocking operation by the lock control device is prohibited.