JPH0761327A - Burglar preventive device for vehicle - Google Patents

Abstract

PURPOSE:To improve the burglar preventing effect by preventing the dishonest act such as insertion of foreign material with the structure that a code is input by turning a door key cylinder. CONSTITUTION:When the lock signal is sent from a remote key 2, a control device 1 carries out an alarm mode routine under the condition that all doors are closed, and when each courtesy switch 10, 11, 12 of a door, a trunk and an engine and an intrusion sensor 13 detect the dishonest intrusion, the control device 1 operates a position lamp 15, a tail lamp 16 and a horn 17 for alarming. In the alarm mode, when a key plate 2a is inserted to a door key cylinder and it is turned within ten seconds, the control device 1 catches the code signal by the rotation detecting signal from a door key rotating switch 7, and in the case this code signal coincides with a registered code, the control device 1 cancels the alarm mode. In the case where the key plate 2a is not turned after passing ten minutes, the control device 1 performs the alarm operation to improve the burglar preventing effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control means for performing switching control of start and stop of a security system which performs an alarm operation according to a detection signal of an unauthorized intruder based on a transmission signal from a portable transmitter. The present invention relates to a vehicle antitheft device.

[0002]

2. Description of the Related Art Recently, in automobiles as vehicles,
Some doors can be locked and unlocked by remote control without using keys. That is, when a lock signal or an unlock signal is transmitted using a remote key as a portable transmitter, the receiving device provided on the automobile side receives the signal and outputs a drive signal from the control device to the door lock mechanism. The lock operation or the unlock operation is performed, and the user does not need to insert the key into the door key cylinder and rotate the key each time, which is excellent in usability.

In this case, since the radio signal transmitted from the remote key is provided with an identification code for identifying the corresponding vehicle, the radio signal is identified even if a lock signal or an unlock signal is received from another remote key. If the codes do not match, the door lock mechanism cannot be operated. Since the number of combinations of the identification code increases as the number of digits increases, the identification code is not easily deciphered by a third party and can be extremely safe against theft. .

However, in case of an emergency, a door key cylinder is provided so that the door can be mechanically locked and unlocked as in the conventional case. If it is given, there is a risk of theft.

Therefore, recently, for example, if all the doors are in a closed state when a door lock signal is received from a remote key, the controller locks the door lock mechanism and sets a warning mode to steal the door. There are some that are designed to prevent this.

That is, in this setting mode of the warning mode, the control device causes the door lock mechanism to perform the unlocking operation and release the warning mode only when the unlock signal from the remote key is received. Therefore, when the door is opened by other means, an alarm operation is performed based on a detection signal from a door courtesy switch, an intrusion sensor, or the like.

In this alarm operation, for example, a horn is sounded, a position lamp and a tail lamp are operated to blink so that attention is given to the surroundings. It is possible to give up and prevent theft from occurring as much as possible.

[0008]

In the above case, if the warning mode is released only when the unlock signal is transmitted from the remote key, the transmitter circuit of the remote key may be broken or the built-in battery may reach the end of its life. If it reaches the limit, it becomes impossible to send the unlock signal, and even if the user has a regular remote key, he / she will be warned when the door lock mechanism is unlocked using the key plate. Since the mode is not released,
When the door is opened, there is a problem that an alarm action will be performed as if an illegal act occurred.

Therefore, conventionally, in order to deal with such a problem, for example, in addition to the transmission of the unlock signal from the remote key, the setting state of the warning mode can be released by using the key plate. Is being considered.
In this case, the key plate is used to sequentially rotate the door key cylinder to the lock side and the unlock side, whereby a predetermined code signal is formed and input by the combination.

That is, the input code by the key is registered and stored in advance in the control device on the automobile side, and when the key plate of the remote key is inserted into the door key cylinder, the insertion is detected by the shutter switch, and the key plate is detected. The input code generated by the rotating operation of the door key is sequentially received and stored as the detection signal of the rotating operation of the door key rotation switch to the lock side or the unlock side, and the input code is correct when the key plate is pulled out from the door key cylinder. It is configured to judge whether or not it is, and to release the setting state of the warning mode when it is correct. As a result, the door lock mechanism is directly unlocked and the alarm operation is performed when the door is opened, so that the occurrence of theft can be prevented and the above-mentioned inconvenience is solved.

However, in order to provide a method for inputting a predetermined key input code by rotating the door key cylinder as a method for canceling the setting state of the warning mode, the key input code will be input by an illegal means. It is conceivable that a fraudulent act will occur. For example, there is a so-called picking method of inserting a key input code by inserting a wire or the like into a door key cylinder to turn on / off a door key rotation switch.

Therefore, due to such an illegal act,
When a correct input code is given from the door key rotation switch, the control device cancels the setting state of the warning mode, which causes a problem that the antitheft effect is lowered.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to start and stop the security system by inputting a code by inserting a key into a door key cylinder and rotating the key. Even in such a case, it is an object of the present invention to provide a vehicle antitheft device capable of preventing a fraudulent act such as inserting a foreign object into a door key cylinder to unlock a door lock mechanism.

[0014]

SUMMARY OF THE INVENTION According to the present invention, control for switching start / stop of a security system for performing an alarm operation in response to an unauthorized intruder detection signal is performed based on a transmission signal from a portable transmitter. The present invention is directed to a vehicle antitheft device including means, a shutter switch that detects an open / closed state of a shutter of a door key cylinder, and a door key rotation switch that detects rotation of the door key cylinder in a locking direction and an unlocking direction. When the shutter switch detects the open state of the shutter of the door key cylinder, the control means executes the alarm operation when a rotation detection signal from the door key rotation switch is not input within a predetermined time, If the rotation detection signal from the door key rotation switch is input within the time, Characterized in was configured to release the active state of said security system when there is a match against the previously stored code sequentially receives an input of the detection signal.

[0015]

According to the vehicle anti-theft device of the present invention, the control means performs switching between activation and deactivation of the security system based on the transmission signal from the portable transmitter, and in the activated state of the security system, An alarm operation is executed in response to a detection signal such as a door being opened or an unauthorized intruder being detected. Further, in this activated state, when the shutter of the door key cylinder is in the open state, and when the rotation operation is performed within a predetermined time thereafter, the control means controls the door key rotation switch input by the subsequent rotation operation. The rotation detection signals from the above are sequentially received, and the input code signal is collated with the code stored in advance. When they match, the activation state of the security system is released.

On the other hand, when the shutter of the door key cylinder is in the open state in the above-mentioned starting state and if the rotation operation is not performed within a predetermined time thereafter, the control means receives the rotation detection signal from the door key rotation switch. If no input is made, the alarm action will be executed.

As a result, if the user turns the door key cylinder with a regular key to input a code signal and then turns the key immediately after the key is inserted, the subsequent turn input will take time. If the foreign object other than the legitimate key is inserted into the door key cylinder due to a fraudulent act such as picking, it will be detected and an alarm will be activated when it is not rotated within a predetermined time. Therefore, the anti-theft effect will be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 showing an electrical configuration, a control device 1 as a control means provided on the side of a vehicle body (not shown), which is a vehicle, has a CPU, ROM, RA inside.
The security program is stored including M and the like, and a detection program that is executed in a state where the warning mode is set is also stored, as will be described later.

The remote key 2 as a portable transmitter is
It is for opening and closing a door (not shown) of this automobile, and is composed of a key plate 2a as a key for mechanically opening and closing the door and a key grip 2b for holding the key plate 2a. The key grip 2b is provided with a lock switch 3 for transmitting a lock signal and an unlock switch 4 for transmitting an unlock signal. When these are pressed, a lock is performed by a transmission circuit (not shown) incorporated inside. The signal or unlock signal is output as a radio wave signal.

On the other hand, a receiving device 5 for receiving a radio wave signal from the remote key 2 is provided on the automobile side and is connected to the input terminal P1 of the control device 1. When receiving the radio wave signal via the antenna 5a, the receiving device 5 demodulates the radio wave signal into a lock signal or an unlock signal and inputs the signal to the control device 1.

The door (not shown) is provided with a door key cylinder, and the key plate 2a of the remote key 2 is provided so as to be insertable and rotatable. A shutter is provided at the insertion opening of the door key cylinder, and a shutter switch 6 for detecting the insertion of the key plate 2a into the door key cylinder when the shutter is open.
Is provided. Further, a door key rotation switch 7 for detecting the rotation of the door key cylinder due to the rotation operation is provided.

The door key rotation switch 7 is adapted to detect the rotation of the door key cylinder in the locking direction and the unlocking direction from the off position and, as described later, functions as a mechanical code signal reading device. It also has. The output terminals of the shutter switch 6 and the door key rotation switch 7 are connected to the input terminals P2 and P3 of the control device 1 via the input circuit 8, respectively.

The door is provided with a door lock mechanism 9 which is driven in accordance with the rotation of the door key cylinder. The door lock mechanism 9 is locked by the turning operation in the lock side direction and is rotated in the unlock side direction. It is designed to be unlocked by dynamic operation. Further, as will be described later, when the door lock mechanism 9 receives a lock signal or an unlock signal from the output terminal Q1 of the control device 1 via the drive circuit 9a, the door lock mechanism 9 operates in accordance with the lock signal or the unlock signal. It has become.

The door courtesy switch 10 for detecting the open / closed state of the door is provided corresponding to each door, and is connected to the input terminal P4 of the control device 1 via the input circuit 8 (in the figure). Represents a door courtesy switch 10 corresponding to one door).

A trunk courtesy switch 11 (hereinafter abbreviated as T courtesy switch) and an engine hood courtesy switch 12 (hereinafter abbreviated as EF courtesy switch) detect open / closed states of a trunk and an engine hood as compartment doors (not shown), respectively. The output terminal is an input circuit 8
Is connected to the input terminals P5 and P6 of the control device 1 via.

The intrusion sensor 13 arranged in the vehicle interior outputs a detection signal when an object invading the vehicle interior is detected, and is composed of, for example, an infrared pyroelectric sensor or an ultrasonic sensor. The signal output terminal of the intrusion sensor 13 is an input terminal P of the control device 1 via the input circuit 13a.
Connected to 7.

The indicator 14 is a display lamp arranged in the instrument panel of the driver's seat, and receives a drive signal from the output terminal Q2 of the control unit 1 via the drive circuit 14a.
In response to this, a lighting operation is performed and a display operation is performed as described later.

The position lamp 15 and the tail lamp 16 as auxiliary lamps which are turned on at night or in the twilight state also have a function as an alarm means, and are connected from the output terminals Q3 and Q4 of the control device 1 through the drive circuits 15a and 16a. When a control signal is given by the control signal, the lighting operation is performed accordingly. The horn 17 also has a function for performing an alarm operation, and the drive circuit 17
When a control signal is given from the output terminal Q5 of the control device 1 via a, the control device 1 sounds.

Next, the operation of this embodiment will be described with reference to the flow chart of the detection program shown in FIG. First, when a lock signal is transmitted from the outside by the remote key 2 while the automobile is stopped with all doors closed, the control device 1 gives a lock signal to the door lock mechanism 6 to cause the lock operation. At the same time, the security system is activated to implement the alert mode.

In this warning mode, the intrusion sensor 13 is activated by the control device 1 to accept the detection signal, and the detection signals from the door courtesy switch 10, the T courtesy switch 11 and the EH courtesy switch 12 are received and monitored. It becomes a state.

When the unlock signal is received from the remote key 2 during the execution of the alert mode, the unlock signal is given to the door lock mechanism 6 to perform the unlock operation and the alert mode is released. When the door is opened without receiving the unlock signal or the window glass is broken into the vehicle, the control device 1 causes the courtesy switches 10, 11, 1 to operate.
The alarm operation is carried out based on the detection signal from 2 or the detection signal from the intrusion sensor 13.

In the alarm operation, the control unit 1 controls the position lamp 15, the tail lamp 16 and the drive circuit 15 to operate.
a and 16a, a blinking drive signal is applied to cause a blinking operation, and a horn 17 is given a ringing signal via a drive circuit 17a to intermittently cause a horn 17 to awaken the attention of the surroundings and intruder. It is the one that tries to abandon the execution of cheating.

As described above, in the state where the warning mode is set, the control device 1 executes the detection program shown in FIG. 2 and receives a signal from the key inserted in the door key cylinder. ing. this is,
For example, when the built-in battery of the regular remote key 2 owned by the user has expired, or the internal signal transmission circuit has a failure, and transmission of the radio signal is disabled, Remote key 2 key plate 2
This is performed when the warning mode is canceled or the door is opened using a.

That is, when the detection program is started, the control device 1 first clears the value of the counter N to "0" in step S1 and also clears the time count values of the timers T1 and T2 to "0". Thereafter, the control device 1 determines that the step S2 for determining whether the value of the counter N is "3" is "NO" and proceeds to step S3, until the shutter of the door key cylinder is opened. During this period, the standby state is waited for the input of the detection signal from the shutter switch 6.

When the shutter switch 6 outputs a detection signal indicating that the shutter of the door key cylinder is in the open state, the control device 1 determines "YE" in step S3.
S "is determined and the process proceeds to step S4, and the timer T1 is started.

The timer T1 is used to determine whether or not the door key cylinder has been rotated within 10 seconds after the detection signal indicating the shutter open state of the door key cylinder is output from the shutter switch 6. The control device 1 waits until an ON signal indicating that the door key cylinder has been rotated is input from the door key rotation switch 7 in steps S5 and S6.

If the ON signal is not input from the door key rotation switch 7 within 10 seconds after the shutter switch 6 outputs the shutter open detection signal, the control device 1 returns "YES" in step S6. After making a determination, the process proceeds to step S7, and the alarm operation as described above is performed assuming that an abnormal state has occurred.

This assumes, for example, a case where so-called picking is performed in which a foreign material such as a wire is inserted into the door key cylinder to rotate the door key cylinder, and such an illegal act is performed. In this case, the fact that the door key cylinder cannot be immediately rotated in 10 seconds is used to detect the occurrence of fraudulent activity by not inputting an ON signal from the door key rotation switch 7. In this case, In this case, an alarm operation is performed to alert the surroundings of the occurrence of fraudulent activity and to give up.

If the user performs the first rotation operation within 10 seconds after the regular key plate 2a is inserted into the door key cylinder, the shutter switch 6 outputs a shutter open detection signal. Since the ON signal is output from the door key rotation switch 7 within 10 seconds after the start, the control device 1 determines "YE" in step S5.
S ", the process proceeds to step S8, the timer T1 is stopped and cleared, and the process proceeds to step S9. Then, in this step S9, the control device 1
Does not start the timer T2, so "N
When it is determined to be "O", the process proceeds to step S10.

Thereafter, the control device 1 repeats steps S10 and S11 until the key plate 2a is pulled out from the door key cylinder, thereby detecting the rotation of the door key rotation switch 7 in the locking direction or the unlocking direction. A signal is input and the input pattern is stored.

When the operation of the input pattern is completed and the key plate 2a of the remote key 2 is pulled out from the door key cylinder and the shutter is closed, the controller 1
Judges "YES" in step S11 based on the detection signal from the shutter switch 6 and determines in step S12.
Then, it is judged whether or not the input code stored just now matches the code registered in advance. If they match, it is determined that the input code is correct and "YES".
Then, the process proceeds to step S13, the setting state of the warning mode is released, the count value N is cleared to "0" at step S14, and then the process returns to step S2.

On the other hand, when the input code does not match the registered code, the control device 1 makes a "NO" determination at step S12 and proceeds to step S15 to increment the count value N by "1". And in other words, in this case, "1"
Then, the process returns to step S2. Then, after this, the control device 1 repeats the above steps to cancel the setting state of the warning mode when there is a correct input code, and adds “1” to the count value N when there is an erroneous input. Do it.

After that, when the input code is erroneously input three times in succession in this way, the count value N becomes "3", so that the controller 1 returns "Y" in step S2.
Then, the process proceeds to step S16, and the timer T2 is started. After that, when the key plate 2a is inserted into the door key cylinder and rotated within 10 seconds in the same manner as described above, the control device 1
Goes through steps S5 and S8, and since the timer T2 has started in step S9, it is determined to be "YES" and the process proceeds to step S17.

Here, the control device 1 judges whether or not the count time of the timer T2 has passed 5 minutes or more, and "N"
If "O", the process proceeds to step S18, and if the shutter of the door key cylinder is in the open state, step S1 is performed again.
If the key plate 2a is pulled out and the shutter switch 6 detects that the shutter is closed, the operation returns to "NO". The determination is made, and the process returns to step S2.

That is, when the input code is erroneously input three times, the input code due to the rotation operation of the door key cylinder cannot be accepted by the control device 1 until the lapse of 5 minutes. Then, after 5 minutes, the control device 1
It is determined to be "YES" in step S17, and step S1
Go to 9 and clear the count value N to "0",
In step S20, the timer T2 is stopped and cleared, and the process proceeds to step S10, and the acceptance of the input code is restarted.

In the above case, in step S2, "Y
When it is determined that 5 minutes or more have elapsed after the key plate 2a is inserted into the door key cylinder after the timer T2 is started in step S16 after determining "ES", the control device 1 proceeds to step S17. At that time, "YE
When it is determined to be "S", the process directly proceeds to step S10 through steps S19 and S20.

As a result, even if the key plate 2a is inserted and rotated in the door key cylinder due to a fraudulent act by a third party, if the input code is input three times or more by an erroneous operation, the input code is input for five minutes thereafter. Since the acceptance of the code is prohibited, it becomes impossible to repeatedly perform the input operation, so that it becomes possible to give up the illegal act.

According to this embodiment, the control device 1
Thus, when a rotation detection signal is not input from the door key rotation switch 7 within 10 seconds after the shutter switch 6 detects the shutter open state of the door key cylinder, an alarm operation is performed. When a fraudulent act is performed by inserting a key etc., it becomes possible to detect that the door key cylinder is not rotated within 10 seconds, and it is possible to give up the execution of the fraudulent act. When a user who knows the input code uses the regular key plate 2a to perform an input operation, if he / she rotates only within the first 10 seconds, the subsequent input operation is subject to a time constraint. It can be done slowly without having to improve the usability.

Further, according to this embodiment, even when the control device 1 inserts the key plate 2a of the remote key 2 into the door key cylinder to input the input code,
If an incorrect input operation is performed three or more times in succession, a five-minute input prohibition period is set, so if a third party does not know the correct input code even if he / she has a duplicate key, etc. Since it is not possible to continuously perform input operations many times, it is possible to give up an illegal intrusion act.

In the above embodiment, the timer time of the timer T1 is set to 10 seconds and the timer time of the timer T2 is set to 5 minutes. However, the timer time is not limited to this, and may be set to an appropriate time to achieve the purpose. Is something that can be done. Also, although the allowable number of times the input code is erroneously input is set to three times, it is not limited to this,
In order to achieve the purpose, it may be set to 2 times or less, or may be set to 4 times or more.

In the above embodiment, the case where the alarm operation is performed using the position lamp 15, the tail lamp 16 and the horn 17 has been described, but the present invention is not limited to this, and for example, a headlight may be used as the alarm means. Alternatively, a dedicated alarm device may be provided.

[0052]

As described above, according to the vehicle antitheft device of the present invention, the door key cylinder is provided with the shutter switch and the door key rotation switch, and the shutter switch detects the open state of the shutter by the control means. When the rotation detection signal from the door key rotation switch is not input within the predetermined time, the alarm operation is performed, and when the rotation detection signal from the door key rotation switch is input within the predetermined time, the subsequent rotation detection signal Since the security system has been configured to cancel the activation state when the input is received in sequence and checked against a pre-stored code, the door key cylinder will not be rotated if an illegal act such as picking is performed. Or, it does not rotate immediately, so be careful not to rotate it within the specified time. It can be determined that the fraud,
Also, if the first turning operation is performed within the predetermined time, the operation time for inputting the code by the turning operation can be operated slowly without restriction, so that the antitheft effect can be improved and the usability is improved. It also has an excellent effect of being excellent.

[Brief description of drawings]

FIG. 1 is an electrical configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart of a detection program.

[Explanation of symbols]

1 is a control device (control means), 2 is a remote key (portable transmitter), 2a is a key plate, 3 is a lock switch,
4 is an unlock switch, 5 is a receiving device, 6 is a shutter switch, 7 is a door key rotation switch, 9 is a door lock mechanism, 10 is a door courtesy switch, 11 is a trunk courtesy switch, 12 is an engine hood courtesy switch, and 13 is an intrusion sensor. , 14 is an indicator, 15 is a position lamp, 16 is a tail lamp, and 17 is a horn.

 ─────────────────────────────────────────────────── ─── 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 (1)

[Claims] 1. An anti-theft vehicle protection equipped with a control means for performing switching control of start and stop of a security system which performs an alarm operation in response to an unauthorized intruder detection signal based on a transmission signal from a portable transmitter. In the device, a shutter switch for detecting an open / closed state of a shutter of the door key cylinder, and a door key rotation switch for detecting rotation of the door key cylinder in a locking direction and an unlocking direction, the control means, When the open state of the shutter of the door key cylinder is detected, the alarm operation is executed when the rotation detection signal from the door key rotation switch is not input within a predetermined time, and the rotation detection signal from the door key rotation switch is detected within the predetermined time. When input, the subsequent rotation detection signal input will be accepted in sequence. An anti-theft device for a vehicle, wherein the security system is configured to release the activation state of the security system when the code is compared with the stored code.