JP3055372B2 - Key cylinder abnormality detection device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality of a key cylinder for a vehicle which is rotatable when a key is inserted.

[0002]

2. Description of the Related Art For example, in an automobile, a door key cylinder for locking and unlocking a door from outside with a key is provided on an outer portion of the door.
An ignition key cylinder for starting an engine or supplying power by a key is provided in a driver's seat portion.

In this case, in a door key cylinder or an ignition key cylinder, when a key is inserted and a key rotor is rotated, a rotation detection signal is output by a door key rotation switch or an ignition switch, and the control device detects the rotation detection signal. Thus, the above-described operation is controlled.

In recent years, various measures have been taken in order to prevent illegal acts by inserting foreign matter or the like into a door key cylinder or an ignition key cylinder and rotating the door key cylinder or the ignition key cylinder. I have. As such a means, for example, there is a case where a switch for detecting insertion of a key is provided in a door key cylinder or an ignition key cylinder.

In the door key cylinder, a shutter switch is provided so as to detect opening / closing of a shutter provided in a key insertion opening, or a key position switch is provided so as to detect a key insertion state of an ignition key cylinder. It is a configuration provided.

In this case, in the door key cylinder,
When a legitimate key is inserted, the key rotor is usually rotated immediately, so that if the door key rotation switch is not turned on within a certain period of time after the shutter is opened, for example, illegal operations such as picking are performed. It can be determined that it has been done.

In some cases, a key position switch is provided in an ignition key cylinder in order to determine whether or not the ignition switch detects the turning position of the key cylinder in a state where a proper key is inserted.

For example, if the key rotation switch is not turned on within a predetermined time after the shutter switch detects the shutter open state of the door key cylinder, the control device issues It is determined that the key rotor of the door key cylinder is not being rotated by using the key of (1), and an alarm operation is performed, or a predetermined operation is performed after the key position switch detects insertion of the key into the ignition key cylinder. If not, an alarm operation is performed in a similar manner.

In the above-mentioned alarm operation, for example, a horn is sounded, and a position lamp and a tail lamp are blinked so as to call attention to the surroundings. Execution of the act can be abandoned, and theft can be prevented as much as possible.

[0010]

However, if an abnormality occurs in the operation of detecting various switches in order to perform such a detection operation, it becomes impossible to reliably detect and judge an improper act. There are cases. Further, even when the operation of various switches is inconsistent due to a mechanical malfunction of the door key cylinder or the ignition key cylinder, a correct detection operation may not be performed.

[0011] In such a case, with the conventional device, the user cannot recognize that the detection operation cannot be performed normally, so that no countermeasure can be taken and fraud has occurred. Even in such a case, there is a problem that the alarm operation is not performed and 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 provide a vehicle capable of detecting and reporting an abnormality in an operation state of a key cylinder when the abnormality occurs. An object of the present invention is to provide a key cylinder abnormality detecting device.

[0013]

SUMMARY OF THE INVENTION An abnormality detection apparatus for a key cylinder for a vehicle according to the present invention is intended for a key cylinder for a vehicle which is rotatable in a key insertion state, and detects the key insertion. Key insertion detecting means, rotation detecting means for detecting rotation of the key rotor, notifying means for notifying an abnormal state, and rotation from the rotation detecting means in a state where the key insertion detecting signal is not outputted from the key insertion detecting means. When the detection signal is output, the key insertion is performed on the notification means.
The present invention is characterized in that it is provided with determining means for performing a notification operation indicating a failure state of the input detecting means .

[0014]

According to the vehicular key cylinder abnormality detecting device of the present invention, when the vehicular key cylinder operates normally, when a key is inserted, it is detected by the key insertion detecting means, and thereafter, the key is rotated. When operated, a rotation detection signal is output from the rotation detecting means in accordance with the rotation of the key rotor. When the detection signal is output from the detection means in response to the operation of the key, the operation is determined to be normal and the subsequent operation is permitted.

On the other hand, for example, when the key insertion is performed but the key insertion detecting means does not detect the key insertion, or when the rotation detecting means outputs the rotation detection signal without the key insertion, the key is detected. A rotation detection signal is output from the rotation detection means in a state where the detection signal indicating the key insertion is not output from the insertion detection means, and in this case, the determination means determines that the state is abnormal and informs the user. This causes the means to perform the notification operation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an automobile in which a door can be locked and unlocked by using a remote key will be described with reference to the drawings. In FIG. 1 showing an electrical configuration, a control device 1 as a determination unit provided on a vehicle body (not shown) which is a vehicle is configured to include a CPU, a ROM, a RAM, and the like inside. A security program is stored, and an abnormality detection program executed in the vehicle stop mode state to detect an abnormal state of the switch operation is stored as described later.

The remote key 2 is for remotely locking and unlocking the door (not shown) of the vehicle, and includes a key plate 2a as a key for mechanically opening and closing the door. And a key grip 2b for holding it. 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.

An ignition key cylinder (hereinafter abbreviated as an IG key cylinder) provided in a driver seat (not shown) has a key position switch 6 as key insertion detecting means for detecting insertion of the key plate 2a of the remote key 2, and An ignition switch (hereinafter abbreviated as IG switch) 7 is provided as rotation detection means for detecting the rotation position of the key rotor of the IG key cylinder. In this case, the IG switch 7 detects four turning positions: an OFF position, an ACC position for turning on the accessory power, an ON position in an engine start state, and an ST position for starter start. The key position switch 6 and the IG switch 7 are connected to the input terminals P2 and P3 of the control device 1 via the input circuit 8, respectively.

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 rotated. A shutter is provided at an insertion opening of the door key cylinder, and a shutter switch 9 is provided as key insertion detecting means for detecting insertion of the key plate 2a into the door key cylinder when the shutter is opened. Further, a door key rotation switch 10 is provided as rotation detection means for detecting rotation of the key rotor of the door key cylinder.

The door key rotation switch 10 detects rotation of the key rotor of the door key cylinder from the off position in the locking direction and the unlocking direction. Output terminals of the shutter switch 9 and the door key rotation switch 10 are connected to input terminals P4 and P5 of the control device 1 via an input circuit 8, respectively.

The door is provided with a door lock mechanism 11 which is driven in accordance with the rotation of the key rotor of the door key cylinder. The door is locked by a rotation operation in the lock direction and is unlocked in the unlock direction. The unlocking operation is performed by the turning operation of. 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 11a, the door lock mechanism 11 performs a lock operation or an unlock operation according to the lock signal or the unlock signal. It has become.

A door courtesy switch 12 for detecting the open / closed state of the door is provided corresponding to each door, and is connected to an input terminal P6 of the control device 1 via an input circuit 8 (see FIG. Represents a door courtesy switch 12 corresponding to one door).

A trunk courtesy switch 13 (hereinafter abbreviated as a T courtesy switch) and an engine hood courtesy switch 14 (hereinafter abbreviated as an EF courtesy switch) are provided so as to detect open / close states of a trunk and an engine hood (not shown). The output terminal is connected to the input terminals P7 and P8 of the control device 1 via the input circuit 8.

The intrusion sensor 15 disposed in the vehicle compartment outputs a detection signal when detecting an object entering the vehicle compartment, and is composed of, for example, an infrared pyroelectric sensor or an ultrasonic sensor. A signal output terminal of the intrusion sensor 15 is connected to an input terminal P of the control device 1 through an input circuit 15a.
9 is connected.

An indicator 16 as a notifying means is a display lamp disposed on the instrument panel of the driver's seat, and receives a drive signal from an output terminal Q2 of the control device 1 via a drive circuit 16a. As described later, a lighting operation is performed to perform a display operation.

The position lamp 17 and the tail lamp 18 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 drive circuits 17a and 18a. When a control signal is given by the controller, the lighting operation is performed in response to the control signal. The horn 19 also has a function as an alarm means, and emits a sound when a control signal is given from the output terminal Q5 of the control device 1 via the drive circuit 19a.

Next, the operation of the present embodiment will be described with reference to the flowcharts of the abnormality detection program shown in FIGS. First, in a state where the vehicle is in a stopped state and the alert mode has not been set yet, as described later, it is determined whether the operation of switches for detecting cheating in the alert mode is normal or not. In this mode, the abnormality detection program shown in FIGS. 2 and 3 is executed to make the determination.

That is, first, the control device 1 determines whether or not the operation states of the shutter switch 9 and the door key rotation switch 10 of the door key cylinder are normal by executing the abnormality detection program shown in FIG. It has become. When the control device 1 starts the program, it determines in step S1 whether or not the shutter of the door key cylinder is open based on the detection signal from the shutter switch 9, and if no operation is performed with the shutter closed. Is determined to be "NO", and the routine goes to step S2.

Next, the control device 1 determines whether or not the door key rotation switch 10 has detected the rotation of the key rotor of the door key cylinder. If no rotation detection signal is output and no operation is performed, " NO ”and step S3
Then, the warning operation is not executed here, so that "NO" is determined and the process returns to step S1.

Thereafter, the control device 1 detects the operating state of the door key cylinder by repeating the above-described steps S1 to S3 in the stop mode, and both the shutter switch 9 and the door key rotation switch 10 function normally. If so, it operates as follows.

First, the key plate 2 is attached to the door key cylinder.
If a is inserted, a detection signal indicating that the shutter is open is output from the shutter switch 9, so that the control device 1 determines "YES" in step S1 and shifts to step S3, where a warning operation is performed. Is not performed.
O "is determined, and the process returns to step S1.

If the shutter switch 9 has a failure and does not output a detection signal in spite of the fact that the shutter is open, the control device 1 proceeds to step S1.
, The process proceeds to step S2, where the door key rotation switch 1
When the rotation detection signal is output from 0, the detection signal is input from the shutter switch 9 in spite of detecting that the key rotor is rotated and the door key cylinder is in the inserted state of the key plate 2a or the like. Therefore, the determination is "YES" and the process proceeds to step S4.

The control device 1 determines "NO" in step S4 because the warning operation is not performed, executes the warning operation, and prohibits the transition to another mode (steps S5 and S6). . In this warning operation, the control device 1 outputs a warning signal to the indicator 16 to perform a blinking operation at a predetermined frequency, thereby notifying the user that the shutter switch 9 is abnormal. . Thereafter, while this state continues, the control device 1 repeats steps S1 and S2, again determines "YES" in S4, and returns to step S1, thereby returning the shutter switch 9 to the open state. The warning operation is continued until the detection signal is input.

When a detection signal indicating an open state is output from the shutter switch 9, the control device 1 determines "YES" in step S1 and shifts to step S3 where a warning operation is executed. "YE
S "and the process proceeds to step S7. Since the shutter switch 9 operates normally, the control device 1 stops the warning operation and cancels the state in which the transition to another mode is prohibited (steps S7 and S8).

Since the operation of the shutter switch 9 has returned to the normal state, the control unit 1 repeats the normal steps when executing this program.

In the above case, it is assumed that the shutter switch 9 does not output a detection signal even when the key plate 2a is inserted into the door key cylinder. When a rotation detection signal is output from the door key rotation switch 10 for some reason in a state in which nothing is inserted into the door key, the state is detected by proceeding in exactly the same manner. And
When the output of the rotation detection signal from the door key rotation switch 10 stops, the control device 1 determines that the state is normal.

Thus, the door key rotation switch 1
In the state where 0 is turned on, the shutter switch 9 should always detect the shutter open state of the door key cylinder prior to this. However, if an abnormality occurs in the detection operation by these switches, a warning described later will be made. In the execution state of the mode, there is a possibility that the control device 1 may not be able to normally perform the operation of detecting the misconduct, but by executing the above-described abnormality detection program in the state where the stop mode is being executed, caution is exercised. Even when the mode is shifted, the detection operation can be reliably performed.

The control device 1 determines the operation of the IG switch 6 and the key position switch 7 by executing the abnormality detection program of FIG. 3 by interrupt processing or the like. That is, first, the control device 1 determines whether or not the key plate 2a has been inserted into the IG key cylinder in step T1 based on the detection signal from the key position switch 7, and determines whether the key plate 2a or the like has not been inserted. Then, it is determined “NO” and step T2
Move to

Next, the control device 1 sets the IG switch 6 to I
It is determined whether or not the rotation of the key rotor of the G key cylinder has been detected. If no rotation detection signal has been output and no operation has been performed, “NO” is determined and the process proceeds to step T3, where a warning operation is also performed. Is not executed, the determination is "NO", and the process returns to step T1.

Thereafter, the control device 1 detects the operating state of the IG key cylinder by repeating the above-described steps T1 to T3 in the stop mode, and both the key position switch 7 and the IG switch 6 function normally. If so, it works as follows.

First, the key plate 2 is attached to the IG key cylinder.
When a is inserted, a detection signal indicating the key insertion state is output from the key position switch 7, so that the control device 1 determines "YES" in step T1 and shifts to step T3. Since the warning operation has not been performed yet, "NO" is determined, and the process returns to step T1.

If the key position switch 7 has failed and does not output a key insertion detection signal even if the key plate 2a is inserted, the control device 1 proceeds to step T2 via step T1. , IG switch 6
When the rotation detection signal is output from the IG key cylinder, the detection signal is input from the key position switch 7 in spite of detecting that the key rotor has been rotated while the IG key cylinder is in the inserted state of the key plate 2a or the like. Therefore, it is determined that the answer is "YES" and the process proceeds to step T4.

Since the warning operation is not performed, the control device 1 determines "NO" in step T4, executes the warning operation, and prohibits the transition to another mode (steps T5 and T6). . In this warning operation, the control device 1 outputs a warning signal to the indicator 16 to perform a blinking operation at a predetermined frequency different from the above, thereby notifying the user that an abnormality has occurred in the key position switch 7. I will be. Thereafter, while this state continues, the control device 1 again performs the steps T1 and T2 to
The determination of "YES" in 4 and the return to step T1 are repeated, whereby the warning operation is continued until the detection signal indicating the key insertion state is input from the key position switch 7.

When a detection signal indicating an open state is output from the key position switch 7, the control device 1
In step T1, it is determined "YES" and the process shifts to step T3. Here, since the warning operation is executed, "Y
ES ”and the process proceeds to step T7. Since the key position switch 7 operates normally, the control device 1 stops the warning operation and releases the prohibition of shifting to another mode (step T).
7, T8).

Since the operation of the key position switch 7 has returned to the normal state, when the program is executed thereafter, the control unit 1 repeats the normal steps.

In the above case, it is assumed that the detection signal is not output from the key position switch 7 even when the key plate 2a is inserted into the IG key cylinder.
Even if a rotation detection signal is output from the IG switch 6 for some reason in a state where nothing is inserted into the IG key cylinder, the state is detected by proceeding in exactly the same way. And IG
When the output of the rotation detection signal from the switch 6 stops, the control device 1 determines that it is in a normal state.

As described above, when the IG switch 6 is turned on, the key position switch 7 must always detect the key insertion state of the IG key cylinder before the switch is turned on. If an abnormality occurs in the warning mode described below, there is a possibility that the control device 1 may not be able to normally perform the operation of detecting a fraudulent action in the execution state of the later-described alert mode. By executing the above-described abnormality detection program, the detection operation can be reliably performed even when the mode shifts to the alert mode.

Next, when the operation states of the shutter switch 9, the door key rotation switch 10, the key position switch 7 and the IG switch 6 are normal as described above, the control device is set when the alert mode is set. 1
Operates as follows.

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 the door lock mechanism 11 a lock signal. In addition to the lock operation, the security system is operated to execute the alert mode.

In this alert mode, the control device 1 activates the intrusion sensor 15 to receive a detection signal, and receives and monitors detection signals from the door courtesy switch 12, the T courtesy switch 13, and the EH courtesy switch 14. 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 11 to perform an 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 inside of the vehicle, the control device 1 sets the courtesy switches 12, 13,
The alarm operation is performed based on the detection signal from the intrusion sensor 15 or the detection signal from the intrusion sensor 15.

In the alarm operation, the control device 1 controls the position lamp 17 and the tail lamp 18 to drive the driving circuit 17.
The horn 19 is intermittently sounded by giving a horn 19 a sounding signal via a drive circuit 19a, while providing a blinking drive signal via the drive circuit 19a.
Attempts have been made to call attention to others and give intruders abandon the conduct of cheating.

Now, in the alert mode setting state, the control device 1 executes a detection program and receives a rotation detection signal input by a rotation operation of a key inserted into the door key cylinder. . This is, for example, the case where the built-in battery of the legitimate remote key 2 owned by the user has expired, or the radio signal cannot be transmitted due to a failure in the internal signal transmission circuit. The operation is performed when the warning mode is canceled or the door is opened using the key plate 2a of the remote key 2.

That is, when the control device 1 starts the detection program, the control device 1 is in a standby state waiting for the input of a detection signal from the shutter switch 9 until the shutter of the door key cylinder is opened. When a detection signal indicating that the shutter of the door key cylinder is in the open state is output from, the control waits until an ON signal indicating that the key rotor of the door key cylinder has been rotated is input from the door key rotation switch 10. I will be.

When the shutter switch 9 outputs a shutter open detection signal, the control device 1 thereafter controls the lock direction or the unlock direction from the door key rotation switch 10 until the key plate 2a is pulled out of the door key cylinder. Then, a detection signal indicating the rotation to 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 whether the currently stored input code matches a pre-registered code, and if so, determines that the input code is correct and cancels the alert mode setting state .

On the other hand, when the alert mode is set,
When the key plate 2 a is inserted into the G key cylinder, the control device 1 detects the insertion state of the key plate 2 a based on the detection signal from the key position switch 7, and outputs the detection signal from the IG switch 6. A signal is transmitted to the remote key 2 side based on this, and waits for the unlock signal to be transmitted together with the identification code from the remote key 2, thereby detecting that the regular key plate 2 a has been inserted, and starting the operation of the starter. Enabled.

According to this embodiment, the control device 1
By executing the abnormality detection program in the vehicle stop mode, the operation states of the shutter switch 9, the door key rotation switch 10, the IG switch 6 of the IG key cylinder, and the key position switch 7 provided on the door key cylinder are determined, and the abnormality is determined. If a warning has occurred, a warning signal is given to the indicator 16 to perform a warning operation, and the transition to the alert mode is awaited. Therefore, the occurrence of fraudulent activity is reliably detected in the alert mode setting state. And the anti-theft effect can be improved.

In the above embodiment, the case where the present invention is applied to an automobile using the remote key 2 has been described. However, the present invention is not limited to this, but can be applied to an automobile having only a mechanical key. It is. Further, in the above embodiment, the case where the present invention is applied to both the door key cylinder and the ignition key cylinder has been described. However, the present invention is not limited to this, and it is also possible to adopt a configuration using only one of the key cylinders as necessary. It is.

[0061]

As described above, according to the vehicular key cylinder abnormality detecting device of the present invention, the rotation detecting signal is output from the rotation detecting means in a state where the key insertion detecting signal is not output from the key insertion detecting means. When the output is outputted, the notifying means is caused to perform the notifying operation by the judging means. For example, when the key insertion is performed but the key insertion detecting means does not detect this, or there is no key insertion. However, there is an excellent effect that it is possible to detect and notify that there is an abnormality in the detection operation such as when the rotation detection means outputs a rotation detection signal.

[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 an abnormality detection program for a door key cylinder.

FIG. 3 is a diagram corresponding to FIG. 2 of an ignition key cylinder.

[Explanation of symbols]

1 is a control device (determining means), 2 is a remote key, 2a is a key plate (key), 5 is a receiving device, 6 is an ignition switch (rotation detecting means), 7 is a key position switch (key insertion detecting means), 9 Is a shutter switch (key insertion detecting means), 10 is a door key rotation switch (rotation detecting means), 11 is a door lock mechanism, 12 is a door courtesy switch, 13 is a trunk courtesy switch,
14 is an engine hood courtesy switch, 15 is an intrusion sensor, 16 is an indicator (notifying means), 17 is a position lamp, 18 is a tail lamp, and 19 is a horn.

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Sadao Kokubu 1 Noda, Toyota, Oguchi-machi, Oguchi-machi, Niwa-gun, Aichi Prefecture Inside Tokai Rika Electric Works (56) References JP-A-60-124553 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60R 25/00-25/10 E05B 1/00-75/00

Claims (1)

(57) [Claims] 1. A key cylinder for a vehicle, which can be rotated in a key inserted state, wherein key insertion detecting means for detecting insertion of the key, rotation detecting means for detecting rotation of a key rotor, and reporting an abnormal state. Notifying means; and when the rotation detecting means outputs a rotation detection signal in a state where the key insertion detecting signal is not output from the key insertion detecting means, the notifying means includes a key insertion detecting means.
And a determination means for performing a notification operation indicating a failure state of the vehicle.