JPH05239963A - Electronic lock device for car door - Google Patents

Abstract

PURPOSE:To prevent any other person from disengaging a locked door by interrupting the read of an entry No. when the entry No. being unidentical from the registered No. occurs over a specified number of runs successively from an external handle switch for setting code No. CONSTITUTION:A code No. is in advance registered in an electronic control unit 3, and the applicable door which is locked is disengaged with the output of the unit 3 when the identical No. is entered from an outside handle switch 5. When the door is locked, reading the entry No. externally is prohibited for a certain period of time if the entered code No. being unidentical from the registered code No. occurs over a certain number of runs successively. Thereupon the switch 5 judges that the entering operation is made by any undue person, prohibits reading of the entry No. for a certain period of time, and prevents undeliberate disengagement resulting from successive entries.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic lock device for a vehicle door in which a cipher is set by operating a handle for opening and closing the door.

[0002]

2. Description of the Related Art Generally, at least a door on the driver's seat side of an automobile door can be locked from the outside with an engine key, but a keyless lock type door can be locked without using the engine key. It is easy to cause a trouble that the engine key is locked with the engine key left. In such a case, various cryptographic unlocking devices have been proposed for unlocking the door lock from the outside without a key. For example, a ten-key is installed on the outer surface of the door, and if the code entered from the ten-key matches the code registered in advance in the internal processing device, the door lock is electromagnetically released. However, in this method, since the ten-key pad is exposed on the outer surface of the door, not only is the appearance impaired, but there is the drawback that it is easily mischievous.

Therefore, the inventors of the present invention previously proposed an electronic lock device for a vehicle door which utilizes a switch interlocking with an outside handle (handle) for opening and closing the door to input a code by operating the handle. According to this method, no special parts are exposed on the outer surface of the door, so there is no aesthetic problem.

[0004]

However, even with the above-mentioned method of inputting the code by the outside handle (handle), the mischief of the handle by a third party remains unsolved, and the handle is operated several times by this mischief. While doing so, there is a problem that the encryption numbers coincide with each other and the lock is released.

The present invention seeks to solve the above-mentioned drawbacks by limiting the reading of encryption numbers.

[0006]

In order to solve the problem, the present invention is to lock the door with the output of the unit when the code number registered in advance in the electronic control unit and the code number inputted from the outside match. In the electronic lock device for a vehicle door that unlocks, when the entered code number does not match the previously registered code number a predetermined number of times or more when the door is locked, the code input from the outside for a predetermined time. The feature is that reading of numbers is prohibited.

[0007]

[Function] It is highly likely that the fact that the encryption numbers do not match several times is due to an operation by a third party.
Therefore, if the code number input when the door is locked does not match the code number registered in advance for a predetermined number of times or more in succession, it is determined that it is due to an operation by a third party and is input from the outside for a predetermined time. Disable reading the encryption number. In this way, it is impossible for the encryption numbers to match each other no matter how many times the input operation is attempted during the predetermined time, so that the lock is not accidentally released.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention, 5 is a switch (outside handle SW) which is turned on and off in conjunction with an external handle for opening and closing a door, and 6 is a door solenoid of a driver's seat. SW and 7 are fuses. The solenoid SW6 is inside the door and instructs the ECU 3 to set (lock) and unlock (unlock) the door lock. The solenoid 4 is related to unlocking, and the locking solenoid is omitted. 31 is CM
33, which is an OS microcomputer
Is a solenoid drive circuit.

FIG. 2 is a general flow chart showing the basic processing outline of the microcomputer 31, which distinguishes the encryption setting and the determination from the ON / OFF of the switch 6 and accordingly the presence or absence of the D seat lock. That is, if the serial signal is read when unlocked, it is set (registered) as an encryption, and if it is read when locked, the encryption judgment is performed. If the determination results match, a signal is output to the solenoid drive circuit 33 to energize the solenoid 4 (lock release).

FIG. 3 is a basic flow of serial signal reading processing. In this process, the outside handle S
When W5 is OFF for 3 seconds or more, the encryption is determined to be valid, and when it remains OFF for 1 second, the digit is switched. _Remember in _KETA . KETA is a digit counter that stores the number of digits.

FIG. 4 is a basic operation waveform diagram of FIG. 1, in which each digit of the cipher code is input by correlating the number of ON times of the outside handle SW5 with the numbers 0-9. And solenoid SW6
Depending on the state, the encryption is set when the door is unlocked and the encryption is determined when the door is locked. Since they match in this example, the unlock solenoid control signal (unlock pulse) is output from the microcomputer 31 to the solenoid drive circuit 33. The code digit can be changed depending on the time after the door is locked.

As described above, according to the first embodiment of the present invention, as shown in the flow chart of FIG. 2, since the encryption setting is permitted when the D door is in the unlocked state, the encryption number can be easily changed by a third party. There is no such thing. The example of FIG. 5 shows a first modification of the present invention, in which an encryption setting switch 8 is added in hardware, and in terms of software, encryption is performed between D door lock (N) and serial signal reading in FIG. The judgment step of setting SW ON is inserted. That is, the registration is permitted only when the door is unlocked and the cipher setting switch 8 is turned on. Therefore, it is possible to more reliably prevent the third party from changing the encryption number.

FIG. 6 shows a second modification of the present invention, in which a protection condition is added as pure software instead of the switch 8 described above, and encryption can be set only at the first D-door unlock after the initial. It is what Initialization is performed when the battery is connected, so the encryption setting (change) is performed by disconnecting the battery and reconnecting. This method does not require any additional hardware configuration.

FIG. 7 shows a third modified example of the present invention, which is a method for restricting encryption settings in the format of a serial signal. For example, if it is a three-digit code, it is invalid unless it is input within a fixed time. Specifically, the effective width of ON time a is 0.1 to 2 seconds, and the effective width of OFF time b is 0.1 to 2 seconds.
1 second, the effective width of the digit separation time c is 1 to 3 seconds, and OFF
When the time exceeds 3 seconds, it is determined that the input is completed, and if 3 digits are not input during this time, it is invalid. Also, a,
Signals that deviate from the range of b are also invalidated. A to above
The value of c is almost adjusted to the human operation interval.

On the other hand, FIG. 8 shows an example of the processing of the present invention.
When the encryption valid process of FIG. 7 is executed by software, a protection measure for turning on the handle SW for 10 seconds or more and then inputting a signal is added. Therefore, in this example, the D seat is unlocked and the steering wheel SW is O for 10 seconds or more.
The encryption can be set only when the three conditions of N and the encryption valid according to FIG. 7 are satisfied. In this example, when the D-seat is locked, if the cryptographic input does not match the registered cryptographic code three times in a row, it is determined that the cryptographic input is performed by a third party, and thereafter the reading is not permitted for a certain period of time. Therefore, it is impossible for the third party to make the same encryption number no matter how many times the third party tries to input the encryption during this fixed time.

Further, in the present embodiment, the signal is inputted by the switch interlocked with the external handle, but it goes without saying that a hidden SW or the like can be used.

[0017]

As described above, according to the present invention, it is possible to realize an electronic lock device in which the lock is not accidentally released by mischief by a third party.

[Brief description of drawings]

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

FIG. 2 is a basic general flow chart.

FIG. 3 is a basic flowchart of a serial signal reading process.

FIG. 4 is a basic operation waveform diagram of FIG. 1.

FIG. 5 is a first modification example of the present invention.

FIG. 6 is a second modification of the present invention.

FIG. 7 is a third modification example of the present invention.

FIG. 8 is an example showing processing contents of the present invention.

[Explanation of symbols]

 3 ... Electronic control unit 4 ... Unlock solenoid 5 ... Outside handle SW 6 ... Door solenoid switch 8 ... Code setting switch

Claims (1)

[Claims] 1. An electronic lock device for a vehicle door, wherein when a code number registered in advance in an electronic control unit and a code number inputted from the outside match, the lock of the door is unlocked by the output of the unit, When the input encryption number does not match the previously registered encryption number a predetermined number of times or more when locked, the reading of the encryption number input from the outside for a predetermined time is prohibited. Electronic lock device.