JPH07156718A - On-vehicle equipment with theft preventing function - Google Patents

Abstract

PURPOSE:To attain on-vehicle equipment provided with a more effective and easy-to-operate security system. CONSTITUTION:This is on-vehicle equipment equipped with theft preventing function which has an theft preventing means 1 and switches whether a vehicle switch means 101 operated by a portable key 100 is in an operative condition, and is provided with a cover switch 3 which is switched, depending on whether or not a cover 2 which covers the whole or partial part of the front surface of the on-vehicle equipment is fitted, and a control means 4 which set the theft preventing means 1 in an operative condition when the cover 2 is fitted, and conducts control so as to release the operation of the theft preventing means 1 when the vehicle switch means 101 sets the on-vehicle equipment in an operative condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expensive on-vehicle device such as an audio device, a video device, a navigation system, etc., which is mounted on a vehicle and has an antitheft function.

[0002]

2. Description of the Related Art Various in-vehicle devices mounted on a vehicle such as an automobile are not only stolen together with the vehicle, but also removed from the vehicle and only the in-vehicle device is stolen. It is easier to steal than a vehicle, and it is more difficult to find and recover stolen items than a vehicle, so only expensive in-vehicle equipment such as audio equipment, video equipment, and navigation systems are stolen. There is a problem. Therefore, in order to prevent such theft, expensive vehicle equipment is provided with its own antitheft system (security system). The following methods are currently considered as typical security systems.

(1) A system in which a vehicle-mounted device can be easily attached and detached, and the vehicle-mounted device can be detached and carried around when the user goes out of the vehicle. (2) A method in which the operation panel on the front of the in-vehicle device can be attached and removed, and only the operation panel is removed to carry around when going out of the vehicle. (3) It can be used when a predetermined input condition such as an ID code previously input by the user is input when connecting to the power supply for reuse after the power supply to the vehicle-mounted device is stopped. A code security method that locks your computer.

(4) In order to reduce the troublesomeness for the user to store the input conditions, a system for providing an ID card reading mechanism is provided so that the user can be identified by the ID card.

[0005]

The above method (1) is reliable as a security system, but has a problem that it is not easy to carry around when a vehicle-mounted device is heavy, and it is complicated. There is also a case where the vehicle is hidden not in the vehicle for carrying around but in an appropriate place in the vehicle, for example, under a seat, but in that case, there is a problem in that the antitheft function cannot be sufficiently achieved because the vehicle is easily found.

The above method (2) is easier than carrying the entire device because the operation panel is lightweight,
Thieves also do not know what kind of equipment because there is no operation panel, there is also an effect that feel stealing is eliminated. However, carrying the operation panel is still complicated, and there is a problem that if the operation panel is lost on the way, it cannot be used. Further, since the operation panel is frequently attached and detached, there is a problem of durability of electric contacts with the main body.

In order to steal the vehicle-mounted device, the code security method of the above (3) must be removed from the battery which is the power source, and even if stolen, it cannot be used unless the predetermined input condition is known. , Has the effect of deterring thieves from stealing. However, a thief who does not know that such a security system is installed will steal, so there is a problem that the effect is not sufficient. In addition, even if a legitimate user removes the in-vehicle device or the battery fails, the lock must be released when connecting to the power supply again, and if you forget the input condition, the lock cannot be released. There is a problem that it can not be used for. Moreover, since the setting of the input condition is complicated, even if the in-vehicle device having such a lock mechanism does not actually set the input condition,
In many cases, the anti-theft function is not used.

Compared to the code security method of (3), the above method (4) does not require the setting of input conditions and the storage of the input conditions, so that the antitheft function can be used easily, but the ID card can be used. Since it is necessary to provide a reading mechanism for the above, there is a problem that the cost becomes high. As described above, various security systems currently considered have their respective problems. The present invention has been made in view of the problems of the various security systems described above, and an object thereof is to realize an in-vehicle device having an effective security system that can be easily used with a simple configuration.

[0009]

FIG. 1 is a diagram showing the configuration of an on-vehicle device with an anti-theft function according to the present invention. In the drawings, parts having common functions are designated by the same reference numerals. The on-vehicle device with an anti-theft function of the present invention that achieves the above-mentioned object is provided with a cover switch 3 that switches depending on whether the cover 2 covering the front surface of the on-vehicle device is attached or not, and whether or not the cover 2 is attached. To switch whether to activate the anti-theft function. Then, the vehicle switch means 101 operated by the portable key 100 of the vehicle itself enables the antitheft function to be released when the in-vehicle device is brought into an operable state.

That is, the present invention is provided with the anti-theft means 1, and is brought into an operable state and an inoperable state by the vehicle switch means 101 operated by the portable key 100 provided in the vehicle to which the in-vehicle device itself is attached. An on-vehicle device with an anti-theft function that can be switched is characterized by including a cover switch 3 and a control means 4.
The cover switch 3 switches depending on whether or not the cover 2 that covers all or part of the front surface of the vehicle-mounted device is attached. The control means 4 activates the anti-theft means 1 when the cover switch 3 indicates that the cover 2 is attached, and at the same time, the vehicle switch means 101.
Controls the operation of the anti-theft unit 1 while the vehicle-mounted device is in operation.

[0011]

According to the in-vehicle device with anti-theft function of the present invention,
When this in-vehicle device is used, the vehicle switch means 101 is brought into a state in which the in-vehicle device can be operated by the key 100 of the vehicle as usual. This allows
Since the anti-theft means 1 is in a non-operating state, the anti-theft means 1 does not operate even if the cover 2 is removed, and normal use is possible. When leaving the vehicle, the cover 2 is attached and the cover switch 3 is turned on, and the vehicle switch means 101 is switched so that the vehicle key 100 is removed and the in-vehicle device cannot operate. As a result, the anti-theft unit 1 is activated.

As described above, whether or not the anti-theft device 1 is activated is determined by the attachment / detachment of the cover 2, so that the anti-theft device 1 can be easily set. Moreover, this cover 2
Need only be held in the vehicle when the in-vehicle device is used, and is attached to the in-vehicle device when leaving the vehicle, so there is no need to carry it around and there is no risk of loss. To release the operation of the anti-theft device 1, the key 1 carried by the user is used.
00 operation. Therefore, a legitimate user naturally has the key 100, and can easily cancel the operation of the antitheft unit 1. Accordingly, even if the cover 2 is removed and the antitheft means 1 starts operating by mistake before the operation of the antitheft means 1 is canceled by mistake, the operation of the antitheft means 1 can be immediately stopped.

[0013]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 2 is a diagram showing the configuration of an embodiment of an on-vehicle device with an anti-theft function according to the present invention. In FIG. 2, reference numeral 10 is an in-vehicle device, and the microcomputer 1
1, a main body 12, a cover switch 3, a speaker 16, and a power switch 17 for the main body 12. Reference numeral 2 is a cover, and 21 is a protrusion provided on the cover 2. 1
Reference numeral 02 denotes a vehicle battery, which is a power source for in-vehicle devices. The microcomputer 11 has a microprocessor (MPU), a ROM, a RAM and the like, as well as a non-volatile ROM 13, a I / O port 14 and a resistor 15 for detecting the state of the cover switch 3 in the same manner as an ordinary one. Have A vehicle switch signal indicating the state of the vehicle switch operated by the key is input to the I / O port 14. Generally, in a vehicle, a vehicle switch operated by a key is in an off state and an in-vehicle device such as a car stereo is in an operating state of an accessory (ACC).
Then, there are three stages, that is, a state in which the vehicle is running, and the in-vehicle device is in an operable state in two states other than the off state.

Since the vehicle-mounted device itself has a timer function and the like, a part of the internal circuit is always supplied with power and is always on. Here, the microcomputer 11 is always on and the I / O port 1
Power supply to the main body 12 is switched in accordance with a vehicle switch signal input to the control unit 4 to control whether the main body 12 is operable or inoperative.

The cover 2 is mounted so as to cover the operation panel on the front surface of the vehicle-mounted device. FIG. 3 is a perspective view showing the cover 2 of this embodiment. Here, although the presence of the security system is displayed on the surface to warn the thief, the cover 2 may be attached to the shape to hide the presence of the vehicle-mounted device. Cover 2
A protrusion 21 is provided on the cover 2, and the cover switch 3 of the vehicle-mounted device 10 is switched according to the attachment / detachment of the cover 2.

In this embodiment, as a security system, when the cover 2 is illegally removed, a warning sound is generated with a loud sound to inform that the cover 2 is stolen, and the cover 2 is illegally removed. In this state, when the power supply of the vehicle-mounted device is further turned off, the two methods of the code security method which requires the input of a predetermined condition at the time of reuse of (3) are used together. Although the speaker 16 is provided to generate the warning sound, if the vehicle-mounted device is an audio system or a television, the speaker provided in them can be used. In the code security method, the user inputs a unique code in advance and the input code is stored in the nonvolatile ROM 13 of the microcomputer 11.
The program of the microcomputer 11 is made so that when the battery 102 is connected to the battery 102 for use again after being disconnected from 02, it cannot be used unless the same code as the stored code is input.

When the in-vehicle device having the above-mentioned configuration is used, the vehicle switch is brought into a state in which the in-vehicle device becomes operable by the key of the vehicle as in the usual case. The microcomputer 11 detects this and cancels the operation of the security system. Specifically, the data indicating the address storing the input code in the non-volatile ROM 13 is changed from the address storing the code originally input by the user to the address storing the default value which does not require the input of the code. . By doing so, even when the operation of the security system is canceled, the code entered by the user is left as it is, and there is no need to enter it again. As described above, since the security system is in the non-operating state, even if the cover 2 is removed, the security system does not operate and the normal use is possible.

When leaving the vehicle, the cover 2 is attached and the cover switch 3 is connected, and the vehicle switch is turned off by turning the key of the vehicle.
This activates the security system,
The data indicating the address storing the input code in the non-volatile ROM 13 is changed to the address storing the code originally input by the user. If the cover 2 is removed as it is, the microcomputer 11 detects it, confirms that the vehicle switch is in the off state, and then causes the speaker 16 to generate a warning sound. At this time, if the vehicle switch changes to make the in-vehicle device operable,
Immediately stop the warning sound. When the connection with the battery 102 is further disconnected while the warning sound is being output, the data indicating the address storing the input code in the non-volatile ROM 13 is the code originally input by the user. This is the address that has been input, and the code that is the same as the code that the user has independently input is required for reuse.

Next, the processing of the microcomputer 11 for generating the warning sound and setting / releasing the lock will be described. FIG. 4 is a flowchart showing this processing. Step 4
In 01, it is determined that the cover switch 3 is on. If it is on, it is in a state where it is not used because the cover 2 has been attached by the user, and the process proceeds to the processing of step 402 and subsequent steps for setting the security system in the operating state. If it is off, step 407 is performed to deactivate the code input security system.
Go to and change the address of the restart input code to the position showing the default value so that you do not need to enter the code when restarting. After step 407, step 401 is performed again.
Return to.

In step 402, in order to activate the code input security system, it is necessary to change the address of the restart input code to the position indicating the address storing the code input by the user and input the code when restarting. To be In step 403, it is determined again that the cover switch 3 is in the on state. As long as the cover switch 3 is in the ON state, the cover switch 3 is not used or stolen, so this process is repeated. Cover switch 3
Is turned off, it means that the cover 2 has been removed. Therefore, it is determined in step 404 whether the cover 2 has been removed by an authorized user. In step 404, it is determined whether the vehicle switch is in a state where the vehicle-mounted device can be used and the user is an authorized user. If the vehicle switch is not in a state where the in-vehicle device can be used, it is considered that the cover 2 has been removed by an unauthorized user. Therefore, in step 405, the speaker 16 is switched to output an alarm sound, and then step 404 is performed. Return to. If the vehicle switch is in a state where the vehicle-mounted device can be used, it is considered that a legitimate user has put the vehicle switch in this state with the key. Therefore, in step 406, the output of the alarm sound is stopped and the process returns to step 401.

Even if the legitimate user removes the cover 2 before turning the vehicle switch with the key, the process returns to step 405 after step 405. Therefore, if the user has the key to turn the vehicle switch, steps 404 and 406 are performed. After that, the output of the alarm sound is immediately stopped. If the in-vehicle device is removed from the battery 102 while the alarm sound is still being output, the alarm sound output is stopped due to the power supply. However, as described above, the address of the restart input code is changed in step 402. Since the code entered by the user has been changed to the position indicating the stored address, code entry is required at the time of restart, and the code entry security system operates.

The code input process at the time of restart is the same as the process in the conventional code input security system.
A brief description will be given here. FIG. 5 is a flowchart showing this processing. In step 501, the microcomputer 11 is initialized. In step 502, the address of the restart input code stored in the nonvolatile ROM 13 is read, and the restart input code stored in the read address is read. In step 503, it is determined whether the restart input code is the default value. With the default value, the code entry security system does not operate and shifts to normal operation. If the restart input code is not the default value, the code input process from step 504 is performed.

In the code input, i
Up to one input shall be allowed. In step 504, this number i is input to the register. Step 50
In step 4, the user is prompted to enter a code by voice or display, and in step 504, it is confirmed that the code input is completed.
In step 504, it is determined whether the input code is the same as the stored restart input code. If the input code is the same, it is considered that the user is a valid user, and thus the normal operation is performed. If not, steps 508 and 509
At, it is determined whether the erroneous input is the i-th time. If the incorrect input is repeated i times, it is considered that the user is not a legitimate user, so all the operations are stopped in step 510 so that the user cannot restart. This means that even if you steal, you cannot use it without knowing the restart input code. If an erroneous input is made in step 508 but it is not the i-th time, it is considered to be an input error by a valid user, and the process returns to step 506.

As described above, in the in-vehicle device of this embodiment, the security system can be easily set and released depending on whether the cover 2 is attached or not, and the key is considered to be owned by only a legitimate user. Since the security system can be released by turning the vehicle switch operated by, the operation is less complicated than the conventional one. For example, if the cover 2 is not attached, the security system is in a released state. Therefore, when a legitimate user removes and replaces this device, the cover 2 is simply replaced without attaching, and a troublesome restart operation is performed. No longer needed.

In the above embodiment, the alarm sound generation and the code input method are used together as the security system, but only one of them may be used. Although all the control processing is performed by the microcomputer, the alarm sound generation processing can be realized by a hardware circuit. FIG. 6 is a diagram showing an embodiment of a hardware circuit for performing the alarm sound generation processing. In FIG. 6, reference numeral 3 is a cover switch, which is turned off when the cover 2 is attached. When the cover 2 is removed from the mounted state, the resistors 61 and 62 and the capacitor 6 are removed.
By 3, the input of the Schmitt trigger type inverter 64 changes to "H" and the output changes to "L". Then, the output is input to the monostable multivibrator 66 via the inverter 65 as a signal rising to "H". In response to this, the monostable multivibrator 66 generates a pulse and the flip-flop 67
Entered in. The flip-flop 67 is cleared when the vehicle switch signal makes this in-vehicle device operable, and the alarm signal is not generated regardless of the pulse from the monostable multivibrator 66, but the in-vehicle device cannot operate. At the time of, the alarm sound signal is continuously generated in response to the pulse from the monostable multivibrator 66. The generation of the warning sound signal is stopped only when the flip-flop 67 is cleared by the vehicle switch signal.

Further, in the above embodiment, the cover 2 is shown in FIG.
Although the entire operation panel on the front surface of the vehicle-mounted device is covered as shown in FIG. 5, a part of the operation panel may be covered.
FIG. 7 is a diagram showing an example widely used in a mounting mechanism of an in-vehicle device such as a car radio. In-vehicle device 10
Is accommodated in the accommodation hole 110 at the front of the vehicle, but has a groove 19 on the side surface, and the hook 1 for fixing the groove 19 thereto.
8 are provided. When the in-vehicle device 10 is pushed into the storage hole 110, the hook 18 is hooked on the edge of the storage hole 110 and fixed. For removal, a tool 120 having a thin tip as shown is inserted in the groove 19 and the hook 18 is removed from the edge of the storage hole 110 and taken out. Therefore, it is considered that the portion of the groove 19 is used even in the case of stealing. Therefore, it is considered that only the portion of the groove 19 should be covered to prevent theft.

FIG. 8 is a view showing an embodiment in which the cover covers only the groove 19 portion. As shown in the figure, covers 22 are provided to cover only the grooves 19 on both sides of the vehicle-mounted device 10. Each cover 22 is provided with a protrusion for switching the cover switch 3. In this case, the cover 22 need not be attached / detached even during normal use or when the vehicle is separated from the vehicle, and the cover 2 is kept in a state where the vehicle switch is turned on only when the security system needs to be released for replacement or the like.
Just remove 2.

[0028]

As described above, according to the present invention,
There is an effect that a more effective and easy-to-operate security system for in-vehicle devices can be realized.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a vehicle-mounted device of the present invention.

FIG. 2 is a diagram showing a configuration of an embodiment of an in-vehicle device of the present invention.

FIG. 3 is a diagram showing a cover that entirely covers the front surface of the device according to the embodiment.

FIG. 4 is a diagram showing a process of setting and canceling a security system in the embodiment.

FIG. 5 is a diagram showing a code input process at the time of restart in the embodiment.

FIG. 6 is a diagram showing an embodiment of a hardware circuit for controlling the generation of an alarm sound.

FIG. 7 is a diagram showing an example of an attachment / detachment mechanism of an in-vehicle device.

FIG. 8 is a diagram showing an embodiment of a cover that covers a part of the front surface of the device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Anti-theft means 2 ... Cover 3 ... Cover switch 4 ... Control means 100 ... Key 101 ... Vehicle switch means

Claims (6)

[Claims] 1. A vehicle switch means (10) provided with anti-theft means (1) and operated by a portable key (100) provided in a vehicle to which the in-vehicle device is attached.
It is an on-vehicle device with an anti-theft function that can be switched between an operable state and an inoperable state according to 1), and whether a cover (2) covering all or part of the front surface of the in-vehicle device is attached or not. A cover switch (3) to be switched, and when the cover switch (3) indicates that the cover (2) is attached, the antitheft means (1) is activated and the vehicle switch means (10
1) An on-vehicle with anti-theft function, comprising: a control unit (4) for controlling the operation of the anti-theft unit (1) to be released when the in-vehicle device is in an operating state. Equipment. 2. The in-vehicle device with anti-theft function according to claim 1, wherein the cover (2) is a cover that covers the entire operation panel on the front surface of the in-vehicle device. 3. The cover (2) is a cover for covering a portion that needs to be operated to remove the vehicle-mounted device from a vehicle in which the vehicle-mounted device is mounted. In-vehicle device with anti-theft function described in. 4. The anti-theft function vehicle-mounted device according to claim 1, wherein the anti-theft means (1) includes a speaker (16) for outputting an alarm sound. 5. The control means (4) controls to stop the output of the alarm sound when the vehicle switch means (101) is switched to a state in which the vehicle-mounted device is in an operating state. The in-vehicle device with an anti-theft function according to claim 4. 6. The anti-theft means (1) is provided with an input of a condition previously stored by a user at the time of connecting the power supply for reuse after the power supply to the vehicle-mounted device is stopped. The vehicle-mounted device with an anti-theft function according to claim 1, which is a required system.