JP2871412B2 - Vehicle anti-theft device - Google Patents

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 controlling the start and stop of a security system which performs an alarm operation in response to a detection signal of an intruder based on a transmission signal from a portable transmitter. The present invention relates to a vehicle anti-theft device provided.

[0002]

2. Description of the Related Art In recent years, in automobiles as vehicles,
In some cases, door locking and unlocking operations are performed 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 lock signal or the unlock signal is received by a receiving device provided on the automobile side, a drive signal is output from a control device, and the door lock mechanism is transmitted to the door lock mechanism. The locking operation or the unlocking operation is performed, so that the user does not need to insert the key into the door key cylinder and perform the turning operation each time, which is excellent in usability.

[0003] In this case, since the radio signal transmitted from the remote key is provided with an identification code for specifying the corresponding automobile, the identification signal is received 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. And, as the number of digits of the identification code increases, the number of combinations becomes enormous, so that the code is not easily decrypted by a third party, and the security against theft can be extremely increased. .

However, in case of an emergency, the door is provided with a door key cylinder so that a mechanical lock operation and an unlock operation as in the prior art can be performed. If it is, there is a risk of being stolen.

Therefore, recently, for example, if all the doors are closed when a door lock signal is received from a remote key, the control device causes the door lock mechanism to perform a locking operation and sets an alert mode to set the theft. Some are designed to prevent this.

That is, in the alert mode setting state, the control device causes the door lock mechanism to perform the unlock operation and release the alert mode only when an unlock signal from the remote key is received. 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, and a position lamp and a tail lamp are blinked so as to draw attention to the surroundings. Can be abandoned, and theft can be prevented as much as possible.

[0008]

By the way, in the above case, if the warning mode is released only when an unlock signal is transmitted from the remote key, the transmission circuit of the remote key breaks down or the built-in battery reaches the end of its life. If it has reached, it will not be possible to send an unlock signal, and even if the user has a legitimate remote key, he will be alerted when he unlocks the door lock mechanism using the key plate. Since the mode is not canceled,
When the door is opened, there is a problem that an alarm operation is performed on the assumption that an illegal act has occurred.

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

That is, an input code by a key is registered and stored in advance in a control device on the automobile side, and when a key plate of a remote key is inserted into a door key cylinder, the insertion is detected by a shutter switch, and the key plate is detected. The input code resulting from the turning operation of the door key rotation switch is sequentially received and stored in response to the detection signal of the turning 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 of the door key cylinder. It is configured to judge whether or not the warning mode is set, and to release the set state of the alert mode when the state is correct. Thus, when the door is opened by directly unlocking the door lock mechanism, the occurrence of theft can be prevented by performing an alarm operation, and the above-mentioned problem is solved.

However, in order to provide a method of inputting a predetermined key input code by rotating the door key cylinder as a method of releasing the set state of the alert mode, the key input code will be input by unauthorized means. It is conceivable that wrongdoing will occur. For example, there is a so-called picking method of inserting a key input code by inserting a wire into a door key cylinder and turning on and off a door key rotation switch using a wire or the like.

[0012] Therefore, due to such misconduct,
When a correct input code is given from the door key rotation switch, the setting state of the alert mode is canceled by the control device, so that the anti-theft effect is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to insert a key into a door key cylinder and perform a turning operation so that the security system can be started and stopped by inputting a code. Even in such a case, an object of the present invention is to provide a vehicle anti-theft device capable of preventing illegal acts 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 between start and stop of a security system which performs an alarm operation in response to a detection signal of an unauthorized intruder is performed based on a transmission signal from a portable transmitter. are those directed to the vehicle antitheft device provided with means, times of a shutter switch for detecting the open or closed state of the shutter of the door key cylinder, the locking operation direction and unlocking operation side <br/> direction of the door key cylinder A door key rotation switch for detecting a moving operation and outputting a rotation detection signal , wherein the control means controls the shutter switch to detect the open state of the shutter of the door key cylinder, and to control the door key rotation switch within a predetermined time. The alarm operation is performed when the rotation detection signal is not input, and the rotation from the door key rotation switch is performed within a predetermined time. When the output signal is input, sequentially accepts an input of a subsequent rotation detection signal as a data element, this
A series of times that combine these data elements in chronological order
The shift detection signal is a sequence of data elements stored in advance.
The security system is characterized in that the activated state of the security system is released when the codes match with all the codes.

[0015]

According to the anti-theft device for a vehicle of the present invention, the control means switches between starting and stopping of the security system based on a transmission signal from the portable transmitter. An alarm operation is performed in response to a detection signal indicating that a door has been opened or an unauthorized intruder has been detected. Further, when the shutter of the door key cylinder is opened in the activated state, and when the rotation operation is performed within a predetermined time thereafter, the control means operates the door key rotation switch input by the subsequent rotation operation. sequentially receiving the rotation detection signal from, were these input
Rotation detection signals as data elements are combined in time series
And a series of rotation detection signals
When the code is matched with the code as the column of the data element, the activated state of the security system is released when the code is matched.

On the other hand, when the shutter of the door key cylinder is opened in the above-mentioned starting state and the turning operation is not performed within a predetermined time thereafter, the control means outputs a rotation detection signal from the door key turning switch. The alarm operation is executed when no input is made.

Thus, if the user turns the door key cylinder immediately after inserting the key, as in the case where the user turns the door key cylinder with a regular key to input a code signal, the subsequent turning operation input takes time. Is detected without any restriction, and when a turning operation is not performed within a predetermined time, such as when foreign matter other than a regular key is inserted into the door key cylinder due to an illegal act such as picking, this is detected and an alarm operation is performed. Therefore, the anti-theft effect is improved.

[0018]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 showing the electrical configuration, a control device 1 as control means provided on the side of an automobile main body (not shown) as a vehicle has a CPU, ROM, RA
M and the like, and stores a security program and a detection program that is executed in a state where the alert mode is set, as described later.

The remote key 2 as a portable transmitter is
This is for opening and closing a door (not shown) of the automobile, and includes 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 circuit is provided by a transmission circuit (not shown) incorporated therein. A signal or unlock signal is output as a radio signal.

On the other hand, a receiving device 5 for receiving a radio signal from the remote key 2 is provided on the vehicle side, and is connected to an input terminal P 1 of the control device 1. When receiving the radio signal via the antenna 5a, the receiving device 5 demodulates the 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 a key plate 2a of the remote key 2 is provided so as to be inserted and rotatable. A shutter is provided at an insertion opening of the door key cylinder, and a shutter switch 6 for detecting 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 by the rotation operation is provided.

The door key rotation switch 7 detects the rotation of the door key cylinder from the off position in the locking direction and the unlocking direction, and functions as a mechanical code signal reader as described later. Also has. The output terminals of the shutter switch 6 and the door key rotation switch 7 are connected to input terminals P2 and P3 of the control device 1 via an 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 is locked by a rotation operation in the lock direction, and is turned in the unlock direction. The unlock operation is performed by the moving operation. Further, as described later, when a lock signal or an unlock signal is given from the output terminal Q1 of the control device 1 via the drive circuit 9a, the door lock mechanism 9 performs a lock operation or an unlock operation in response thereto. It has become.

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

A trunk courtesy switch 11 (hereinafter abbreviated as a T courtesy switch) and an engine hood courtesy switch 12 (hereinafter abbreviated as an EF courtesy switch) detect the open / close state of a trunk as a compartment door and an engine hood (not shown). And its output terminal is connected to the input circuit 8.
Are connected to the input terminals P5 and P6 of the control device 1 via.

The intrusion sensor 13 disposed in the vehicle compartment outputs a detection signal when detecting an object entering the vehicle compartment, and comprises, for example, an infrared pyroelectric sensor or an ultrasonic sensor. A signal output terminal of the intrusion sensor 13 is connected to an input terminal P of the control device 1 through an input circuit 13a.
7 is connected.

The indicator 14 is a display lamp disposed on the instrument panel of the driver's seat, and is provided with a drive signal from an output terminal Q2 of the control device 1 via a drive circuit 14a.
In response to this, a lighting operation is performed to perform a display operation as described later.

The position lamp 15 and the tail lamp 16 as auxiliary lamps which are lit at night or at twilight also function as alarm means, and are output from the output terminals Q3 and Q4 of the control device 1 via the drive circuits 15a and 16a. When a control signal is given by the controller, the lighting operation is performed in response to the control signal. The horn 17 also has a function of performing an alarm operation.
When a control signal is given from the output terminal Q5 of the control device 1 via a, a sound is generated.

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

In this alert mode, the control device 1 activates the intrusion sensor 13 to receive a detection signal, and receives and monitors detection signals from the door courtesy switch 10, the T courtesy switch 11, and the EH courtesy switch 12. State.

During the execution of the alert mode, when an unlock signal is received from the remote key 2, an unlock signal is given to the door lock mechanism 6 to perform the unlock operation and release the alert mode. When the door is opened or the window glass is broken in a state in which the unlock signal is not received, and the vehicle enters the vehicle, the control device 1 sets the courtesy switches 10, 11, 1
The alarm operation is performed based on the detection signal from the second or the intrusion sensor 13.

In the alarm operation, the control device 1 controls the position lamp 15 and the tail lamp 16 to drive the driving circuit 15.
a, and a horn 17 is intermittently sounded by applying a sound signal to the horn 17 through a drive circuit 17a, thereby alerting the surroundings and invading the intruder. To give up on the conduct of wrongdoing.

Now, in the state where the alert mode is set, the control device 1 executes the detection program shown in FIG. 2 and receives a signal from the key inserted into the door key cylinder. ing. this is,
For example, when the built-in battery of the authorized remote key 2 owned by the user has expired, or when the internal signal transmission circuit has a failure or the like and the radio signal cannot be transmitted, Key plate 2 of remote key 2
This is executed when the warning mode is canceled or the door is to be 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" and clears the time count values of the timers T1 and T2 to "0" in step S1. Thereafter, the control device 1 determines "NO" in step S2 for determining whether the value of the counter N is "3" and proceeds to step S3 until the shutter of the door key cylinder is opened. During this period, the camera enters a standby state waiting for the input of a detection signal from the shutter switch 6.

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

This timer T1 is used to determine whether or not the door key cylinder has been turned within 10 seconds after the detection signal indicating the shutter key is opened from the shutter switch 6 is output. 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 controller 1 returns "YES" in step S6. The process proceeds to step S7 to determine that an abnormal state has occurred and perform the above-described alarm operation.

This is assumed, for example, in the case where so-called picking is performed in which a foreign object such as a wire is inserted into the door key cylinder to rotate the door key cylinder, and such illegal act is performed. In this case, the door key cylinder cannot be immediately rotated in 10 seconds, and the on-state signal is not input from the door key rotation switch 7 to detect the occurrence state of fraud. In this case, , A warning operation is performed to alert the surroundings of the occurrence state of the fraudulent activity and to give up.

If the first rotation operation is performed within 10 seconds after the user inserts the proper key plate 2a 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 from the start, the control device 1 determines in step S5 that “YE
Then, the process proceeds to step S8, in which the timer T1 is stopped and cleared, and the process proceeds to step S9. Then, in step S9, the control device 1
Has not started the timer T2, so "N
O "is determined, and the process proceeds to step S10.

Thereafter, the controller 1 repeats steps S10 and S11 until the key plate 2a is pulled out of 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 of the door key cylinder and the shutter is closed, the controller 1
Determines “YES” in step S11 based on the detection signal from the shutter switch 6, and returns to step S12
Then, it is determined whether the currently stored input code matches the code registered in advance, and if they match, the input code is determined to be correct and "YES".
Then, the process proceeds to step S13, where the setting state of the alert mode is released, and after the value of the count value N is cleared to "0" in step S14, the process returns to step S2.

On the other hand, if the input code does not match the registered code, control device 1 determines "NO" in step S12 and shifts to step S15 to add "1" to count value N. And in this case "1"
To return to step S2. After that, the control device 1 repeats the above-described steps, thereby canceling the setting state of the alert mode when there is a correct input code, and adding "1" to the count value N when there is an erroneous input. I will do it.

Thereafter, when the input code is incorrectly input three times in succession in this manner, the count value N becomes "3", so that the control device 1 sets "Y" in step S2.
ES ”, and the process proceeds to step S16 to start the timer T2. Thereafter, 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 been started in step S9, it is determined to be "YES" and the process proceeds to step S17.

Here, the control device 1 determines whether or not the count time of the timer T2 has elapsed for 5 minutes or more.
If "O", the process proceeds to step S18, and if the shutter of the door key cylinder is open, the process returns to step S1.
Returning to step S18 and waiting for the elapsed time of the timer T2 to reach 5 minutes or more. If the key plate 2a is pulled out and the shutter switch 6 detects that the shutter is closed, "NO" is returned. Judge and return to step S2.

That is, when the input code is incorrectly input three times, the input code by the rotation operation of the door key cylinder is not accepted by the control device 1 until five minutes have elapsed. Then, after 5 minutes have elapsed, the control device 1
If "YES" is determined in the step S17, the step S1 is performed.
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, so that the reception of the input code is restarted.

In the above case, "Y" is determined in step S2.
After determining “ES” and starting the timer T2 in step S16, if the key plate 2a is inserted into the door key cylinder after 5 minutes or more, the control device 1 proceeds to step S17. Then, "YE
S ", and the process directly proceeds to step S10 via steps S19 and S20.

Thus, even if the key plate 2a is inserted into the door key cylinder and rotated by wrongdoing by a third party, if an input code is input three or more times by an erroneous operation, the input code is input for five minutes thereafter. Since the acceptance of the code is prohibited, the input operation cannot be performed over and over again, so that the illegal act can be abandoned.

According to this embodiment, the control device 1
When the 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. In the state where the fraudulent activity is being performed by inserting the key, etc., it is possible to detect that the door key cylinder is not rotated within 10 seconds, and it is possible to abandon the execution of the fraudulent activity. When the user who knows the input code performs the input operation using the regular key plate 2a, if the user performs the first rotation operation within 10 seconds, the subsequent input operation is time-limited. It can be performed slowly without using, and the usability is also improved.

Further, according to the present embodiment, even when the controller 1 inserts the key plate 2a of the remote key 2 into the door key cylinder to perform the input operation of the input code,
If you make an incorrect input operation three or more times in a row, a 5-minute input prohibition period is provided. If a third party does not know the correct input code even if they have a duplicate key, Since the input operation cannot be performed many times in succession, it is possible to abandon the unauthorized intrusion.

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 present invention is not limited to this. Can be done. In addition, the allowable number of erroneous input of the input code is set to three times, but is not limited thereto.
In order to achieve the purpose, the number may be set to two or less or four 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. However, the present invention is not limited to this. For example, a headlight may be used as the alarm unit. 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 control means detects the open state of the shutter. When the rotation detection signal from the door key rotation switch is not input within a 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 rotation operation is performed. The input of the corresponding rotation detection signals is sequentially received, and these input data are
Time-series combination of rotation detection signals
A series of rotation detection signals and data stored in advance
The security system is configured to release the activation state when it matches and matches the code as a column of data elements, so if an illegal act such as picking is performed, the door key cylinder will not be rotated or immediately Is not rotated, it can be determined that the act has not been rotated within a predetermined period of time, and if there is a first rotation operation within the predetermined period of time, the operation time for inputting the code by the rotation operation is reduced. Since the operation can be performed slowly without restriction, the anti-theft effect can be improved, and an excellent effect of excellent usability can be obtained.

[Brief description of the drawings]

FIG. 1 is an electrical configuration diagram showing one 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 are indicators, 15 is a position lamp, 16 is a tail lamp, and 17 is a horn.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Mizuno 1 Noda, Toyota, Oguchi-machi, Oguchi-cho, Niwa-gun, Aichi Prefecture Inside Tokai Rika Electric Works, Ltd. (56) References JP-A-7-61328 (JP, A) JP-A-7-61326 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60R 25/10 G08B 21/00

Claims (1)

(57) [Claims] An anti-theft vehicle for a vehicle, comprising control means for controlling switching between start and stop of a security system that performs an alarm operation in response to a detection signal of an unauthorized intruder based on a transmission signal from a portable transmitter. in the apparatus, a shutter switch for detecting the open or closed state of the shutter of the door key cylinder lock operation direction and unlocking movement of the door key cylinder
; And a door key rotary switch that outputs a rotation detection signal by detecting a rotational operation of the work direction, the control means, when the shutter switch detects the open state of the shutter of the door key cylinder, within a predetermined time When the rotation detection signal from the door key rotation switch is not input, the alarm operation is performed. When the rotation detection signal is input from the door key rotation switch within a predetermined time, the input of the subsequent rotation detection signal requires data.
As elements , and these data elements are chronologically
For a vehicle, the system is configured to release the activation state of the security system when a series of rotation detection signals formed by combination is checked and matched with a code as a sequence of data elements stored in advance. Anti-theft device.