JP2004086680A - Burglar alarm of on-vehicle electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burglar alarm capable of effectively preventing burglary by surely detecting an initial stage of action which may be necessarily performed in the burglary of on-vehicle electronic equipment and generating an alarm. <P>SOLUTION: A sensor 3 is constituted of an elastic sheet 3b having a pair of conducting parts 3a and stuck to an optional position on the rear side of an interior panel 31. A conducting body (omitted in the shown figure) consisting of a thin plate-like metallic piece is stuck to a position on which the conducting parts 3a of the elastic sheet 3b stuck to the interior panel 31 are abutted. When a gap appears between the interior panel 31 and an electronic equipment storing part 30 at the detachment of the interior panel 31 in burglar action, a burglar action detection circuit detects a state in which ground is disconnected by the separation of the conducting parts 3a from the conducting body. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a burglar alarm device for on-vehicle electronic devices such as a car audio device mounted on a vehicle and a car navigation system.
[0002]
[Prior art]
In recent years, relatively expensive electronic devices such as car audio devices such as CD (compact disk) players and MD (mini disk) players and car navigation systems have been mounted on automobiles. Theft, called vandalism, is on the rise. As a technique for preventing such a theft, a security system including theft prevention of a vehicle itself is known. However, such a security system is generally expensive, and for a user, only the on-vehicle electronic device is stolen. In many cases, it is sufficient to prevent theft, and there is a need for an anti-theft technology specializing in the prevention of in-vehicle electronic devices from being stolen.
[0003]
As such anti-theft technology for in-vehicle electronic devices, Japanese Patent Application Laid-Open No. 2002-029320 has an anti-theft function for invalidating operation commands, and releases the anti-theft function using a memory card storing authentication data. An in-vehicle electronic device is described. This on-vehicle electronic device reduces the motivation of a person who carries out the theft by displaying externally that a person who does not have the memory card cannot operate by using the anti-theft function.
On the other hand, Japanese Patent Application Laid-Open No. H11-259772 discloses a burglar alarm device equipped with a sensor for detecting a detachment operation of an electronic device mounting bracket as a device for generating an alarm when a vehicle-mounted electronic device is stolen. Has been described. This burglar alarm device aims to prevent theft by generating an alarm when the sensor detects the operation of detaching the fitting.
[0004]
[Problems to be solved by the invention]
However, the in-vehicle electronic device described in Japanese Patent Application Laid-Open No. 2002-093320 does not perform any function when a theft is performed, and a person having a technology for canceling the anti-theft function or a device having the anti-theft function. It was not effective for those who did not notice the indication. Further, since the function is provided in the vehicle-mounted electronic device, it is not applicable to existing vehicle-mounted electronic devices.
On the other hand, the burglar alarm device disclosed in Japanese Patent Application Laid-Open No. H11-259772 detects the last-stage action of removing the vehicle-mounted electronic device, so that even if an alarm occurs, the device is taken out as it is. The danger was high and was not always enough to prevent theft.
In addition to the above, a technology for detecting unauthorized opening of a vehicle door or the like is also used, but a special key device or a password is required for opening and closing the door, and the original owner is required to use the key device. If the user loses the password or forgets the password, there is a problem that the door cannot be opened and closed without calling a specialist. In addition, since the opening of the door and the like is a normal operation, there is a possibility that the alarm device may malfunction due to the erroneous operation of the holder, and it is not necessarily required for the holder who only wants to prevent theft of the electronic device. It wasn't very convenient.
[0005]
Therefore, the present invention effectively prevents theft by preventing malfunctions of the sensor and reliably detecting an action at an initial stage and issuing an alarm for an action necessarily performed in the case of theft. It is an object of the present invention to provide a burglar alarm device capable of performing the above.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a burglar alarm device for in-vehicle electronic devices, a sensor that detects a removal operation of an interior panel performed when the in-vehicle electronic device is removed, and a sensor that is connected to the sensor and the sensor is removed. It is provided with an alarm generation device that generates an alarm when an operation is detected. Thus, an alarm can be generated for the prerequisite action for removing the on-vehicle electronic device, and an effective anti-theft effect can be provided.
In this case, as the sensor, when the interior panel is mounted, the sensor is constituted by a conduction portion that contacts a conductor attached to one of the interior panel and the interior panel attachment portion inside the vehicle, and the conduction portion is A device that detects a detaching operation by separating from the conductive body, or a conductive portion that is in contact with a metal portion on the vehicle side when the interior panel is attached, and is removed by separating the conductive portion from the metal portion. The one that detects the operation is used.
[0007]
In addition, the apparatus further includes a second sensor that detects a detaching operation of the in-vehicle electronic device mounted on the interior panel or on the floor inside the vehicle, wherein the alarm generating device is any one of the sensor and the second sensor. Since an alarm is generated when the device detects the detaching operation, it is possible to prevent theft of a vehicle-mounted electronic device such as a display device of a car navigation system mounted on the dashboard.
[0008]
Further, the theft alarm device further includes a power supply control circuit that turns on the alarm generation device when the accessory switch in the automobile is turned off, so that the alarm generation device can be easily and reliably operated. it can.
Further, the theft alarm device further includes a light emitting element control circuit that turns on or blinks a light emitting element when detecting the OFF state of the accessory switch, so that the owner can easily confirm the operation of the alarm generating device, It has the effect of issuing a warning to the thief.
Further, the theft alarm device further includes an alarm control circuit that generates an alarm intermittently at a predetermined time interval when each of the sensors detects a detachment operation. Waste can be suppressed.
In addition, the theft alarm device includes a battery power detection circuit that detects an OFF state of a battery power, and a second alarm that generates an alarm using an auxiliary power when the battery power detection circuit detects an OFF state of the battery power. Since the apparatus further includes the generator, an alarm can be generated even when the battery is removed or the like, and the anti-theft effect can be more reliably achieved.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a theft alarm device according to one embodiment of the present invention.
As shown in this figure, the burglar alarm device 1 according to the present embodiment has an accessory power ON / OFF detection circuit 2 as a power control circuit, sensors 3 to 5, a burglary detection circuit 6 as an alarm generation device, An alarm control circuit 7, an alarm drive circuit 8, a counter counting circuit 9, and an LED drive circuit 10 as a light emitting element control circuit are provided. Further, it includes a battery ON / OFF detection circuit 11 as a battery power detection circuit, an alarm control circuit 12, an alarm drive circuit 13 as a second alarm generation device, an auxiliary power supply 14, and a built-in alarm 15. The theft alarm device 1 is connected to an accessory switch (not shown), a battery, and a horn provided in the vehicle.
[0010]
The accessory power supply ON / OFF detection circuit 2 detects the ON state or the OFF state of the accessory power supply, and operates each circuit when the accessory power supply is in the OFF state. When the theft detection circuit 6 detects the operation of the interior panel or the in-vehicle electronic device based on the sensors 3 to 5, the alarm control circuit 7 controls the alarm drive circuit 8 to generate an alarm. At this time, based on the output from the counter counting circuit 9, the alarm control circuit 7 intermittently controls the generation of an alarm according to a preset time interval and number of times (for example, three times in 20 seconds). In this case, a horn provided on the vehicle is used to generate an alarm.
[0011]
When the accessory power ON / OFF detection circuit 2 detects the OFF state, the LED drive circuit 10 turns on or blinks an LED indicating that the theft alarm device 1 is operating.
The battery ON / OFF detection circuit 11 detects, as an OFF state, interruption of power supply from the battery due to removal of the battery or the like. When the battery ON / OFF detection circuit 11 detects the OFF state, the alarm control circuit 12 controls the alarm drive circuit 13 and generates an alarm by the built-in alarm 15 using the auxiliary power supply 14.
[0012]
FIG. 2 is an explanatory diagram illustrating the operation principle of the sensors 3 to 5 used in the theft alarm device 1.
The sensor 20 used in the burglar alarm device 1 according to the present embodiment has a pair of conducting portions 21 and 21, and as shown in FIG. 2A, an interior panel or the like is attached to a panel attaching portion on the vehicle body side. In this case, the state is in contact with the conductor 22. In this state, the voltage from the battery BATT is not applied to the theft detection circuit 6 because it is electrically connected to the ground GND. That is, when the sensor 20 is grounded, the theft detection circuit 6 does not output a detection signal.
On the other hand, as shown in FIG. 2 (b), when the conducting portions 21, 21 and the conducting body 22 are separated from each other with the act of removing the interior panel or the like, the conduction with the ground GND is released. , The transistor Q1 is turned on and the transistor Q5 is turned on, the voltage from the battery BATT is applied to the theft detection circuit 6, and a detection signal is output. That is, when the sensor 20 cannot be grounded, the theft detection circuit 6 outputs a detection signal.
Thus, in the theft alarm device 1, when the sensor 20 cannot be grounded, the detection signal is output from the theft detection circuit 6 to generate an alarm. Accordingly, an alarm is generated not only when the conducting portions 21 and 21 are separated from the conducting body 22 but also when the connection line connecting the theft alarm device 1 and the sensor 20 is disconnected.
In FIG. 2, the pair of conducting portions 21 and 21 and the conducting body 22 are brought into contact with each other to be grounded. The conductive portion may be grounded by contacting the metal portion on the vehicle body side.
[0013]
FIG. 3 is an explanatory diagram showing a mounting position of the sensor 3.
The sensor 3 is used for detecting a removal operation of the interior panel 31 attached to the electronic device storage unit 30.
As shown in FIG. 3A, the interior panel 31 is provided with hooks (not shown) having claws at a plurality of positions on the outer peripheral end on the back surface side, and the hooks are electronic devices. The electronic device 32 is mounted on the front side of the vehicle-mounted electronic device 32 by being hooked on a concave portion formed in the storage portion 30. A panel receiving portion 33 is provided inside the electronic device housing portion 30 so that the back surface of the outer peripheral end of the interior panel 31 abuts.
As shown in FIG. 3B, the sensor 3 is formed of an elastic sheet 3b having a pair of conducting portions 3a, 3a, and is attached to an arbitrary position on the back side of the interior panel 31. On the other hand, in the panel receiving portion 33 of the electronic device housing portion 30, a conductive body (not shown) made of a thin metal plate is provided at a position where the conductive portions 3a of the elastic sheet 3b affixed to the interior panel 31 abut. Is affixed. An LED 3c that is turned on or off by the LED drive circuit 10 is attached to the tip of the elastic sheet 3b, and is attached so as to be visible from the front of the interior panel 31.
In the state where the interior panel 31 is attached, the ground is formed by the contact between the conductive portions 3a, 3a of the elastic sheet 3b affixed to the back side of the interior panel 31 and the conductive body affixed to the panel receiving portion 33. It is in a state where it has been taken.
In the theft act, when a gap is formed between the interior panel 31 and the electronic device storage unit 30 when the interior panel 31 is removed, a state in which the ground cannot be obtained due to the separation of the conductive parts 3a and 3a from the conductive body. Is detected by the theft detection circuit 6.
Here, the claw portion in the hooking portion of the interior panel 31 is formed with high precision so that there is almost no gap on the front surface of the electronic device housing portion 30, so that the interior panel 31 and the electronic device housing portion are formed by a predetermined tool. When a gap is formed between the sensor 3 and the sensor 30, the removal action can be detected by the sensor 3. Therefore, by using the sensor 3, it is possible to generate an alarm at the initial stage of the act of removing the interior panel 31, and the anti-theft effect can be enhanced.
Further, since the claw portions are formed with high precision, the conducting portions 3a, 3a and the conducting body are in close contact with each other when the interior panel 31 is attached, and a gap is generated in normal use of a vehicle. Since there is no problem, the problem of malfunction can be reliably eliminated.
[0014]
FIG. 4 is an explanatory diagram showing an outline of a mounting position of the sensor 4.
The sensor 4 is used to detect a detaching operation of the interior panel 41 fixed to the interior panel mounting portion 40 inside the vehicle using a fixing tool such as a screw, such as an interior panel called a center console.
The sensor 4 is inserted between the screw insertion hole 41a formed in the interior panel 41 and the screw hole 40a formed in the interior panel attachment portion 40 which is a metal part on the vehicle body side when the interior panel 41 is mounted. It is constituted by an annular body 4a. In mounting the interior panel 41, the screw 42 is screwed into the screw insertion hole 41a, the annular body 4a, and the screw hole 40a and tightened, so that the annular body 4a comes into contact with the screw hole 40a (the metal part on the vehicle body side). Fixed in state.
In the theft act, when the screw 42 is loosened during the work of removing the interior panel 41 and a gap is formed between the screw insertion hole 41a and the screw hole 40a, the annular body 4a becomes the screw hole 40a (metal part on the vehicle body side). The theft detection circuit 6 detects a state in which the ground cannot be removed by moving away from the vehicle.
That is, although the sensor 4 does not have a pair of conductive portions, it is directly connected to the ground GND by contact with the screw hole 40a (the metal portion on the vehicle body side). As a result, the theft detecting circuit 6 can detect a state in which the ground cannot be taken, like the sensor 3.
Therefore, the use of the sensor 4 makes it possible to appropriately detect the removal action and generate an alarm for the interior panel 41 attached with a fixing tool such as a screw.
The sensor 3 may be attached to the interior panel 41 together with the sensor 4.
As shown in FIG. 4A, theft of a display device 50 mounted on a dashboard, such as a monitor (display device) of a car navigation system, is irrespective of the removal of the interior panel. Therefore, theft is prevented by the sensor 5 described later.
[0015]
FIGS. 5 and 6 are diagrams schematically illustrating the mounting position and mounting state of the sensor 5 as the second sensor.
The sensor 5 detects removal of a vehicle-mounted electronic device itself such as a display device of a car navigation system mounted on a dashboard.
Display devices and the like of car navigation systems are different from car audio devices and the like, and many of them are mounted on the surface of an interior panel such as a dashboard. Since such an in-vehicle electronic device does not involve the operation of removing the interior panel, the sensor 5 detects the removal of the in-vehicle electronic device itself.
As shown in FIG. 5, the sensor 5 is composed of a U-shaped flat plate 5b having a pair of conducting portions 5a. The flat plate 5b is inserted between the bearing 53 at the tip of the support arm 52 and the back surface of the support arm attachment portion 51 in the metal support arm attachment portion 51 provided on the back side of the display device 50, and By tightening the screw portion 54 of 52, the conductive portions 5a, 5a are fixed in contact with the back surface of the support arm mounting portion 51 as a conductive body.
In the theft act, when the screw 54 is loosened when removing the display device, the theft act detection circuit 6 detects a state in which the conductive portions 5a, 5a are separated from the back surface of the support arm mounting portion 51 and ground cannot be obtained. I do.
[0016]
As shown in FIG. 6, when the main body device 60 of the car navigation system is mounted on the floor 61 inside the vehicle, the flat plate 5b constituting the sensor 5 is attached to the main body device mounting portion 62 on the floor 61. When the main body device 60 is mounted on the main body device attachment portion 62 by being attached and fixed, the conductive portions 5a, 5a come into contact with the bottom surface of the metal main body device 60 as a conductive body. Note that the main body device 60 is fixed using the planar fastener 63 or the like.
In the theft act, when the main unit 60 is lifted, the theft detecting circuit 6 detects a state in which the back surface of the main unit 60 is separated from the conducting parts 5a, 5a and the ground cannot be removed.
In this way, the sensor 5 can generate an alarm for the act of removing the vehicle-mounted electronic device without removing the interior panel.
[0017]
As described above, by using the sensors 3 and 4, the removal of the interior panel, which is performed as a prerequisite for the removal of the on-vehicle electronic device, is detected. An alarm can be generated at an early stage of the theft, and the anti-theft effect can be enhanced.
In addition, the sensor 5 detects the removal of the device itself of the car navigation system mounted on the dashboard, so that it can be removed without removing the interior panel. Electronic devices can also be prevented from being stolen.
Further, since the theft detection circuit 6 detects that the ground cannot be obtained using the sensors 3 to 5, the alarm can be generated even when the connection line of the sensors 3 to 5 is disconnected. It becomes possible. Therefore, theft can be prevented even when an action that hinders the detection of the theft by the sensor is performed.
[0018]
The accessory power supply ON / OFF detection circuit 2 detects the OFF state of the accessory power supply and activates the other circuits when the accessory power supply is in the OFF state, so that the ignition key normally used when leaving the vehicle is used. Through the operation, the burglar alarm device 1 can be easily and reliably operated by the owner of the vehicle without being particularly conscious.
In addition, the LED as a light emitting element is turned on or blinked by the LED drive control circuit when the theft alarm device 1 is operating. Can be warned.
Further, the alarm control circuit 7 generates an alarm intermittently according to the set time and the number of times based on the output of the counter counting circuit 9, so that the battery is wasted due to the continuous generation of the alarm. Can be suppressed.
In addition, the battery ON / OFF detection circuit 11 detects the interruption of power supply from the battery as an OFF state, so that an action such as disconnection of a connection line connecting the battery and the theft alarm device or removal of the battery is performed. It becomes possible to detect. In this case, the second alarm generating device that generates an alarm by the auxiliary power supply 14 and the built-in alarm is provided. Can occur.
[0019]
In the above embodiment, the sensor 3 is attached to the interior panel 20 and the conductor is attached to the panel mounting portion 21. However, the present invention is not limited to this. The mounting position may be reversed.
Further, the shape and mounting position of each sensor may be changed according to the shape of the interior panel, the in-vehicle electronic device, and the like.
Further, as the sensor, another sensor may be used as long as it can detect removal of the interior panel or the in-vehicle electronic device.
Further, an input unit for setting and changing the generation time and the number of times of the alarm controlled by the alarm control circuit 7 may be provided.
[0020]
【The invention's effect】
As described above, according to the present invention, it is possible to reliably detect an initial-stage action that is inevitably performed when an on-vehicle electronic device is stolen without causing a malfunction of a sensor in normal use of a vehicle. As a result, an alarm can be generated, so that theft can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of a burglar alarm device of the present invention.
FIG. 2 is an explanatory diagram showing the operation principle of a sensor used in the theft alarm device of the present invention.
FIG. 3 is an explanatory view schematically showing a sensor constituting the theft alarm device of the present invention and a mounting position of the sensor.
FIG. 4 is an explanatory view schematically showing other sensors constituting the burglar alarm device of the present invention and the mounting positions of the sensors.
FIG. 5 is an explanatory view schematically showing another sensor constituting the theft alarm device of the present invention and the mounting position of the sensor.
FIG. 6 is an explanatory view schematically showing another sensor constituting the theft alarm device of the present invention and the mounting position of the sensor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Theft alarm device 2 Accessory power ON / OFF detection circuit 3 Sensor 3a Conducting part 3b Elastic sheet 4 Sensor 4a Annular body 5 Sensor 5a Conducting part 5b Flat plate 6 Theft detecting circuit 7 Alarm control circuit 8 Alarm driving circuit 9 Counter counting circuit 10 LED drive circuit 11 Battery ON / OFF detection circuit 12 Alarm control circuit 13 Alarm drive circuit 14 Auxiliary power supply 15 Built-in alarm

Claims (8)

In a burglar alarm device for in-vehicle electronic devices,
A sensor for detecting a removal operation of the interior panel performed when the vehicle-mounted electronic device is removed,
A burglar alarm device for in-vehicle electronic equipment, comprising: an alarm generating device connected to the sensor and generating an alarm when the sensor detects a detaching operation. The sensor includes a conductive portion that contacts a conductive body attached to one of the interior panel and an interior panel mounting portion inside the vehicle when the interior panel is mounted, and the conductive portion is formed from the conductive body. 2. The burglar alarm device for an in-vehicle electronic device according to claim 1, wherein a detachment operation is detected by moving away. 2. The sensor according to claim 1, wherein the sensor includes a conductive part that contacts a metal part on a vehicle side when the interior panel is mounted, and detects the detaching operation by separating the conductive part from the metal part. 3. 4. A burglar alarm device for in-vehicle electronic devices according to claim 1. The apparatus further includes a second sensor that detects a detaching operation of the on-vehicle electronic device mounted on the interior panel or on the floor inside the vehicle, and the alarm generation device is configured such that either the sensor or the second sensor is detached. The burglar alarm device for an in-vehicle electronic device according to claim 1, wherein an alarm is generated when an operation is detected. 5. The power supply control circuit according to claim 1, wherein the theft alarm device further includes a power supply control circuit that turns on the alarm generation device when detecting an OFF state of an accessory switch in the automobile. 6. A burglar alarm device for in-vehicle electronic devices. The in-vehicle electronic device according to any one of claims 1 to 5, wherein the burglar alarm device further includes a light emitting element control circuit that turns on or off a light emitting element when the accessory switch is turned off. Equipment burglar alarm device. The apparatus according to any one of claims 1 to 6, wherein the theft alarm device further includes an alarm control circuit that generates an alarm intermittently at predetermined time intervals when each of the sensors detects a detachment operation. A burglar alarm device for an in-vehicle electronic device according to the above. The theft alarm device includes a battery power detection circuit for detecting an OFF state of a battery power, and a second alarm generation device for generating an alarm by an auxiliary power supply when the battery power detection circuit detects the OFF state of the battery power. The burglar alarm device according to any one of claims 1 to 7, further comprising:

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