JPH05155293A - Anti-theft device for in-vehicle electrical components - Google Patents

Abstract

(57) [Summary] [Purpose] If a legitimate user forgets the secret code of an electrical component, it is possible to avoid the situation where the electrical component becomes unusable due to forgetting the secret code. Anti-theft device. [Structure] In an anti-theft device for in-vehicle electrical equipment, a keyboard 7b for inputting a personal identification number, a controller CR for permitting operation of the electrical equipment (audio device 2) when a valid personal identification number is input, and a keyless Entry device 1
A key code determination unit 0 of 0 or an antitheft device 30 of the vehicle body for determining whether a regular user gets on the vehicle, and a display unit that displays the regular PIN code for a predetermined time when the regular user gets on the vehicle. And 8 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an antitheft device for vehicle-mounted electric equipment. .

[0002]

2. Description of the Related Art Conventionally, as an anti-theft device for an on-vehicle electrical component such as a car radio or car audio device, the electrical component is illegally removed by detecting a change in the potential of the ground component of the electrical component. It is generally well known that an alarm is issued when the connection is cut off (see, for example, Japanese Patent Laid-Open No. 63-2755).

In addition, a personal identification number is set in the electrical component so that the electrical component can be kept in an inoperable state unless a regular personal identification number is input from a personal identification number input keyboard. Are known. When such a security code input type anti-theft device is provided, even if the electric component is stolen, it cannot be mounted on another vehicle and used unless the proper security code is known. Therefore, it is possible to prevent the theft by notifying that the antitheft device is installed.

[0004]

However, in the case where the above-mentioned personal identification number input type antitheft device is provided, even if the user forgets the personal identification number, even if the user is a legitimate user, It is inconvenient because the electrical component cannot be used until the regular PIN is confirmed and entered by some method. Especially, while maintaining the anti-theft effect,
For the purpose of avoiding the inconvenience of entering a personal identification number each time an electrical component is used, only when the connection between the electrical component and the onboard battery is interrupted, the first time the electrical component is used afterwards, It is conceivable to keep the electrical components in an unusable state unless a valid personal identification number is entered.In this case, although the electrical components can certainly be disabled in the case of theft, the user cannot Since there is an opportunity to use the personal identification number only in very limited cases, such as when maintaining electrical components or when replacing the battery, it is likely that the personal identification number will be forgotten frequently.

The present invention has been made in view of the above-mentioned problems. Even if a legitimate user forgets the secret code of an electrical component, the forgetting of the secret code makes the electrical component unusable. An object of the present invention is to provide a theft prevention device for an on-vehicle electrical component that can avoid the above.

[0006]

Therefore, the first invention of the present application is, in an anti-theft device for an on-vehicle electrical component, a personal identification number input means and a predetermined electrical component when a regular personal identification number is input. A control means for permitting operation, a determination means for determining that a legitimate user has boarded, and a display means for displaying the legitimate personal identification number only for a predetermined time when the legitimate user has boarded are provided. It is a feature.

A second invention of the present application is characterized in that, in the first invention, the judging means is a secret code number judging means of a keyless entry device.

Further, a third invention of the present application is characterized in that, in the first invention, the judging means is a vehicle body antitheft device.

[0009]

According to the first invention of the present application, since the judgment means and the display means are provided in addition to the personal identification number input means and the control means, when a legitimate user gets on the vehicle for a predetermined time. Only the legitimate personal identification number can be displayed, and if the legitimate user forgets the personal identification number of the electrical component, the legitimate personal identification number can be confirmed by the display means. It is possible to reliably avoid the situation where the electrical component becomes unusable. That is, it is possible to improve convenience while maintaining the antitheft effect.

According to the second invention of the present application, in the first invention, the determining means is the secret code determining means of the keyless entry device, so that the same effect as the first invention can be obtained. In addition, it is possible to easily and accurately determine that an authorized user has boarded.

Further, according to the third invention of the present application, in the first invention, the judging means is a theft prevention device for the vehicle body, so that the same effect as the first invention can be obtained. It is possible to easily and accurately determine that a legitimate user has boarded.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings, in the case of being applied to an antitheft device for a car audio system. FIG. 1 is a block configuration diagram schematically showing the overall configuration of an antitheft mechanism for preventing the theft of a vehicle-mounted audio device according to the present embodiment. As shown in FIG.
Includes an audio circuit 3 and a speaker device 4 which are well known in the related art. The audio circuit 3 is electrically connected to a controller CR of an audio device 2 with an anti-theft mechanism which is mainly composed of a microcomputer. It is connected.

The controller CR has a battery B mounted on the vehicle.
A power supply circuit 9 connected to the power supply circuit 9 is provided.
It is connected to the audio circuit 3 through a power supply circuit 5 connected to the ACC terminal 6a of the ignition switch 6. The ignition switch 6 is set so that when the ignition key (not shown) is set to the ACC position 6a, electric power is supplied to various in-vehicle electrical components.
In this case, by setting the ignition switch 6 to the ACC position 6a, power is supplied from the power supply circuit 9 to the audio device 2 via the power supply circuit 5.

Further, the controller CR is provided with various operation switches 7a for operating the audio device 2 at a normal time and, as will be described later in detail, a personal identification number relating to the audio device 2 in a specific case. An operation panel 7 having a keyboard 7b capable of inputting is connected. Further, the controller CR indicates that the audio device 2 is provided with an anti-theft mechanism, and as will be described later in detail, the personal identification number of the user relating to the audio device 2 in a specific case. The display unit 8 for displaying is connected.

In the present embodiment, when the connection between the audio device 2 and the vehicle-mounted battery B is once cut off, when the audio device 2 is used for the first time thereafter, for example, a four-digit number is input from the keyboard 7b. The power supply circuit 5 is prevented from being driven unless a regular personal identification number composed of, etc. is input. Therefore, this audio device 2
Even if the user steals the password and attaches it to another car, unless he / she knows the proper personal identification number, the power supply circuit 5 cannot be operated to supply power to the audio circuit 3 and eventually cannot be used. That is, the stolen audio device becomes useless, and the display of the display unit 8 informs that the audio device 2 is provided with such an anti-theft mechanism, thereby suppressing the theft. You can

Further, in the present embodiment, even if the legitimate user forgets the above-mentioned personal identification number, it is possible to avoid the situation in which the audio device 2 becomes unusable due to the forgetting of the personal identification number. Is provided for determining that the user has boarded the vehicle, and the regular password of the audio device 2 is displayed on the display unit 8 for a predetermined time when the regular user gets on the vehicle. ing.

That is, the above-mentioned automobile is equipped with a so-called keyless entry device 10 capable of remotely controlling the operation of the door lock from a place remote from the vehicle by operating the portable transmitter 11. And
The keyless entry device 10 includes a receiving unit 13 that receives a signal wave from the transmitter 11 via a receiving antenna 12.
And a key code determination unit 14 that determines whether a proper personal identification number (key code) unique to the keyless entry device 10 has been input, and the key code determination unit 14 determines that a regular key code has been input. In this case, the door lock drive unit 15 is provided, which locks / unlocks the door lock of the vehicle by, for example, driving a motor in response to an input signal from the transmitter 11.

In the keyless entry device 10, a key code is inputted when the transmitter 11 remotely operates the door lock.
The remote control of the door lock is possible only when it is determined that the entered key code is 4 is authentic. Therefore, the occupant who gets on the door after unlocking the door with the keyless entry device 10 can be determined to be an authorized user who knows the authorized key code.

The key code determination unit 14 of the keyless entry device 10 is the controller CR of the audio device 2.
When a legitimate user gets in the vehicle, a control signal is sent from the key code determination unit 14 to the controller CR. On the audio device 2 side, the personal identification number of the audio device 2 is displayed on the display unit 8 for a predetermined time based on the input of this control signal. The display unit 8 may be shared with, for example, the frequency display unit of the audio device 2, and the display unit of the personal identification number may be provided separately from the display unit of the anti-theft mechanism. ..

The operation of the antitheft mechanism of the audio device 2 will be described below with reference to the flowcharts of FIGS. As shown in FIG. 2, first in step # 1, the ignition switch 6 is set to the ACC position 6
It is determined whether or not the state is not set to a (ACC: OFF), and if this is YES, the indicator of the display unit 8 blinks and the audio device 2 is provided with a theft prevention mechanism, It is displayed that it is ready for operation (step # 2).

Next, at step # 3, it is judged whether or not the connection between the audio device 2 and the battery B is cut off (power supply connection is OFF), and if the judgment result is YES, the theft prevention is performed. The mechanism is activated (step #
4). When the electrical connection between the audio device 2 and the battery B is cut off (step # 3: YES)
Other than the theft, the battery B may be replaced or the audio device 2 may be maintained.

When the operation of the anti-theft mechanism starts, as shown in FIG. 3, first, at step # 11, it is judged whether or not the audio device 2 and the battery B are reconnected (power supply connection is ON). This judgment result is YE
If the result is S, it is determined whether or not a valid personal identification number of the audio device 2 has been input (step #
12). If the determination result is NO, step # 1
At 3, it is determined whether or not all the doors are locked, and if they are locked, the boarding determination of the authorized user is performed (step # 14).

That is, as shown in FIG.
At 31, it is determined whether or not there is a key code input on the side of the keyless entry device 10, and if there is input (step # 31: YES), then it is determined whether or not the input key code is valid. Is determined (step # 3
2). If the result of this determination is YES, it is determined that it is the legitimate user who got on the vehicle (step # 33).

On the basis of the boarding judgment processing result of the above-mentioned authorized user, it is judged at step # 15 whether or not the authorized user has boarded. If the judgment result is YES, at step # 16, the audio device 2 is judged to be authorized. Your PIN is displayed on the display 8
Is displayed for a predetermined time (for example, about 30 seconds or 1 minute). Next, it is determined whether or not the personal identification number is input from the keyboard 7b (step # 17), and this is YES.
In the case of, it is determined whether or not the input personal identification number is valid (step # 18). If the determination result in step # 18 is YES, the operation of the anti-theft mechanism is canceled and the power feeding circuit 5 of the audio device 2 is released.
Is ready for operation (Step # 19 and Step # 2
0), the audio device can be operated normally by operating the operation switch 7a.

It should be noted that the result of the determination in step # 17 is N.
In the case of O, that is, when the personal identification number is not input, it is determined in step # 21 whether or not a predetermined time (for example, about 2 to 3 minutes) has elapsed, and even if the predetermined time elapses, the personal identification number remains unchanged. When there is no input, the operation of the anti-theft mechanism is not released, and the audio device 2 is maintained in the unusable state. If the result of the determination in step # 12 is YES, the input is made in step # 18 without going through the steps such as the determination of boarding the regular user (step # 14) and the display of the personal identification number (step # 16). It is determined whether or not the provided personal identification number is valid. In such a case, the battery B may be replaced or the audio device 2
It is conceivable that the user gets on the vehicle immediately after the maintenance is performed (that is, before all the doors are closed and locked).

As described above, according to this embodiment, when a legitimate user gets on the vehicle, the legitimate personal identification number can be displayed for a predetermined period of time. Even when the password is forgotten, the regular password can be confirmed by the display means, and it is possible to surely avoid the situation where the electrical component becomes unusable due to forgetting the password. That is, it is possible to improve convenience while maintaining the anti-theft effect. Further, since the key code determination unit 14 of the keyless entry device 10 determines that the legitimate user has boarded, the legitimate user can easily and accurately determine the boarding.

The above embodiment (hereinafter referred to as the first embodiment)
Is a key code determination unit 1 of the keyless entry device 10 as a determination means for determining that an authorized user has boarded.
However, instead of this, another system capable of identifying the boarding of a legitimate user, for example, an anti-theft system for the vehicle itself may be used. Hereinafter, the second aspect of the present invention
Examples will be described. In the following description, the same components as those in the first embodiment will be designated by the same reference numerals, and further description will be omitted.

FIG. 5 is a block diagram showing the overall construction of the audio apparatus 2 and the vehicle body antitheft apparatus mounted on the vehicle according to this embodiment. As shown in FIG. Device 30 is an ignition key
An ignition switch 31 operated by (not shown),
A keyless switch 32 that is turned on when the ignition key is inserted into the key cylinder, a door switch 33 that detects an opening / closing operation of the door, and a key cylinder switch 34 that is turned on when the key is inserted into the key cylinder of the door. , A trunk lid switch 35 that detects the opening / closing operation of the trunk lid, a trunk key cylinder switch 36 that is turned on when a key is inserted into a key cylinder on the trunk side, and a link release operation of a lock mechanism of each door or trunk lid. A lock link switch 37 for detecting the above is connected to the control unit CU of the vehicle anti-theft system, and a number of switches for detecting an operation for getting on the vehicle or carrying out luggage from the trunk room are connected. The control unit CU receives the detection signals from the various switches and also outputs a warning when a theft occurs.
The headlamp 42 is also connected so that signals can be exchanged.

If the ignition switch 31 is turned on while the keyless switch 32 is off,
When the door switch 33 detects the opening operation of the door when the key cylinder switch 34 is OFF, and when the trunk lid switch 35 detects the opening operation of the trunk lid when the trunk key cylinder switch 36 is OFF,
Further, when the lock link switch 37 detects the release operation of the link of the lock mechanism while the key cylinder switch 34 and the trunk key cylinder switch 36 are in the OFF state, a non-authorized user other than an authorized user having various authorized keys to be inserted into each key cylinder. When a person illegally opens the door or the trunk lid of the vehicle or operates the ignition switch 31, the headlamp 42 is turned on and the horn 41 is activated to issue a vehicle theft alarm.

On the other hand, even if the legitimate user opens the door or the trunk lid using the legitimate key or operates the ignition switch 31, the horn 41 and the headlamp 42 do not operate. For example, all the doors and the trunk lid. When the keyless switch 32 is turned on in a state where it is confirmed that the vehicle has been closed, it is confirmed that the legitimate user has boarded by setting various switches to a predetermined state. Is configured to release the operation of the vehicle antitheft system.

The control unit CU of the vehicle antitheft device 30 is the controller CR of the audio device 2.
Is connected to the vehicle anti-theft device 30, and when the anti-theft system is released by the boarding of an authorized user on the vehicle anti-theft device 30 side, a control signal is output from the control unit CU to the controller CR, and on the audio device 2 side, Based on the input of the control signal, the personal identification number of the audio device 2 is displayed on the display unit 8 for a predetermined time. That is, as the antitheft mechanism of the audio device 2, a mechanism similar to that shown in the flowchart of FIG. 3 operates. However, in the present embodiment, the boarding determination process for the authorized user is performed using the vehicle theft prevention device 30 instead of the keyless entry device 10.
As shown in FIG. 6, it is determined whether or not the vehicle antitheft system has been canceled (step # 41), and if YES, it is determined that an authorized user has boarded (step # 41).
42).

In each of the above-described embodiments, when it is determined that the legitimate user has boarded, the legitimate personal identification number is displayed on the display unit 8. Instead, after it is determined that a legitimate user has boarded,
When the operation switch 7a of the audio device 2 is operated, the personal identification number may be displayed for a predetermined time in conjunction with the operation. Further, in each of the above-described embodiments, when the electrical connection between the audio device 2 and the vehicle-mounted battery B is once cut off, when the audio device 2 is used for the first time thereafter, the correct password is used. The present invention, which was required to enter a number,
The present invention is not limited to such a type, and can be applied to an antitheft device configured to be kept in an unusable state unless a valid personal identification number is input every time the audio device 2 is used. it can. Further, although the above-mentioned respective embodiments are all directed to the theft prevention device for the audio device 2 of the automobile, the present invention is not limited to this, and it is possible to remove the automobile radio, television or telephone device. Of course, the present invention can be applied to all other electric components that can be attached to other vehicles.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an overall configuration of an anti-theft mechanism of an in-vehicle audio device according to a first embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation start of the anti-theft mechanism of the audio device.

FIG. 3 is a flowchart for explaining the operation of the anti-theft mechanism.

FIG. 4 is a flowchart for explaining a boarding determination process of an authorized user in the anti-theft mechanism.

FIG. 5 is a block configuration diagram showing an overall configuration of an anti-theft mechanism of an in-vehicle audio device according to a second embodiment of the present invention.

FIG. 6 is a flowchart for explaining a boarding determination process for an authorized user in the anti-theft mechanism according to the second embodiment.

[Explanation of symbols]

 2 ... Audio device 7b ... Keyboard 8 ... Display unit 10 ... Keyless entry device 14 ... Key code determination unit 30 ... Vehicle anti-theft device CR ... Controller

Claims (3)

[Claims] 1. A personal identification number input means, a control means for permitting the operation of a predetermined electrical component when a regular personal identification number is input, a determination means for determining that a legitimate user has boarded, and a regular personal identification number. An antitheft device for in-vehicle electrical equipment, comprising: a display means for displaying the above-mentioned authorized personal identification number for a predetermined time when a user gets on the vehicle. 2. The anti-theft device for an on-vehicle electrical component according to claim 1, wherein the determining means is a personal identification number determining means of a keyless entry device. 3. The antitheft device for an on-vehicle electrical component according to claim 1, wherein the determination means is an antitheft device for a vehicle body.