JP2008239003A - On-board electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-board electronic device disabling it to be normally dismounted from a vehicle by modifying a sensor. <P>SOLUTION: An inclination detection part 50 serving as a detection means for detecting that a portable car navigation device 1 as an on-board electronic device is dismounted is incorporated in the casing of the portable car navigation device 1. The car navigation device further comprises a lock control part 408 serving as a lock means for locking the car navigation device 1 in an inoperative state according to the output detected by the inclination detection part 50 when the device is dismounted. The lock control device brings the dismounted car navigation device 1 into an unusable state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted device that is detachably mounted on a vehicle, such as a vehicle-mounted navigation device, and particularly includes detection means for detecting that the vehicle has been removed from the vehicle, and is removed from the vehicle by theft. The present invention relates to a vehicle-mounted device that suppresses theft by making the removed vehicle-mounted device unusable.

  Recently, various electronic devices such as a navigation device, a music player, a DVD player, a television receiver compatible with analog broadcasting and digital broadcasting have been miniaturized, and are provided as portable devices or as in-vehicle devices. In particular, as a vehicle-mounted device, an electronic device having a combination of the various functions described above is also provided.

  Some of these in-vehicle electronic devices are used by being attached to a dashboard of a vehicle like a navigation device, for example. Recently, an in-vehicle / portable electronic device that is equipped with a built-in power source, an AC power source connection unit, etc., is removed from the vehicle and carried outside and can be used at home or at home is also provided. Such a vehicle-mounted device is likely to be stolen because it is relatively easy to remove from the dashboard.

  Various proposals have been made as countermeasures for the case where these in-vehicle electronic devices are stolen. For example, conventionally, the following Patent Document 1 (Japanese Patent Laid-Open No. 2004-355241) discloses an invention of a vehicle communication ECU and a theft monitoring method thereof.

  The technology disclosed in Patent Document 1 relates to an apparatus in which a vehicle-mounted device communicates with the outside through a radio, and includes a sensor that detects a mounting state of the vehicle-mounted device on a vehicle. Is used to monitor abnormal removal such as theft. The detection output from the sensor informs the management center that it has been stolen through the wireless device. At the same time, the radio is locked to be unusable.

  As a specific configuration of the sensor, a concave portion is formed at the vehicle mounting end of the in-vehicle device, a convex portion that fits into the concave portion is formed on the vehicle side, and whether or not the convex portion is fitted into the concave portion. Is to detect. As another configuration, a sensor provided with a sensor corresponding to a vehicle connector for receiving power from a vehicle battery is also considered.

Moreover, the vehicle-mounted electronic device disclosed by this patent document 1 uses the password registered when it attached to the vehicle for the first time as a countermeasure for returning a removal abnormal state to a normal state. When the in-vehicle electronic device is attached to the vehicle again, the password is entered and compared with the password that was originally registered, and if the entered password is correct, the abnormal removal flag is reset. The normal state is restored.
JP 2004-355241 A (paragraph [0018] to paragraph [0020], paragraph [0029] to paragraph [0037])

  However, in the in-vehicle electronic device disclosed in Patent Document 1, since the sensor for monitoring the removal of the in-vehicle device is exposed to the outside, the sensor can be crafted so as not to remove it abnormally. is there. Therefore, it cannot be detected that the sensor does not operate normally and the in-vehicle device is removed. As a result, the conventional technique has a problem that it is impossible to accurately grasp abnormal removal of the in-vehicle device and prevent theft reliably.

  The inventor of the present application, as a result of repeated studies to solve the above problems, when removing the vehicle-mounted electronic device from the installation member, paying attention to the change in attitude from the installation state of the vehicle-mounted electronic device, The present invention is completed by conceiving that the above-mentioned problems can be solved if the detection means for detecting that the in-vehicle electronic device is removed is configured so that it cannot be easily changed from the outside. It has come.

  That is, the present invention aims to solve the above-mentioned problems, makes it impossible to make a normal removal state by crafting the sensor, and detects that the on-vehicle electronic device has been removed abnormally. Then, it aims at providing the vehicle-mounted electronic device which enabled the said vehicle-mounted electronic device to be in an unusable state.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
In an in-vehicle electronic device that is detachably mounted on a vehicle,
The in-vehicle electronic device includes a lock control unit, and a removal detection unit provided in the main body of the in-vehicle electronic device,
The removal detection means is configured to detect that the attitude of the on-vehicle electronic device has changed when the on-vehicle electronic device is removed, and the lock control means is based on a detection output of the removal detection means. Thus, the operation of the in-vehicle electronic device is locked in an impossible state.

  The invention according to claim 2 of the present application is the in-vehicle electronic device according to claim 1, wherein the removal detecting means is formed by an inclination detecting unit that detects that the in-vehicle electronic device is inclined more than a predetermined angle. It is characterized by being.

The invention according to claim 3 of the present application is the vehicle-mounted electronic device according to claim 1 or claim 2, wherein the vehicle-mounted electronic device further includes a password determination unit and a lock release unit,
The password determination unit determines whether the input password matches a previously registered password, and the lock release unit releases the lock by a match determination output from the password determination unit.

  By providing the above configuration, the present invention has the following excellent effects.

  That is, according to the first aspect of the present invention, the removal detecting means built in the in-vehicle electronic device detects that the in-vehicle electronic device has been removed, and the lock control means is based on this detection output. Since the device is locked in an inoperative state, it cannot be used after the vehicle-mounted electronic device is removed from the vehicle. Further, since the removal detecting means is built in the apparatus, it is impossible to intentionally malfunction from the outside, and the in-vehicle electronic device can be effectively prevented from being stolen.

  Further, according to the invention of claim 2, since the removal detection means is constituted by the inclination detection unit that detects the inclination of the device that occurs when the vehicle-mounted electronic device is removed, there is a direct relationship with the vehicle in the structure. There is no need to be exposed on the surface of the in-vehicle electronic device. Therefore, there is no special configuration in the vehicle in order to provide the removal detection means.

  According to the invention of claim 3, the password determination unit determines whether the input password matches a previously registered password, and the lock release unit releases the lock by the match determination output by the password determination unit. Thus, when the owner of the in-vehicle electronic device removes the device and mounts it on the other, the lock can be released and the device can be used again.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment described below exemplifies an in-vehicle electronic device for embodying the technical idea of the present invention, and is not intended to specify the present invention as the in-vehicle electronic device. The present invention is equally applicable to the in-vehicle electronic devices of other embodiments included in the claims.

  FIG. 1 is a side view showing a state in which an in-vehicle electronic device according to an embodiment of the present invention is attached to a vehicle, and FIG. 2 is a state in which the in-vehicle electronic device in FIG. FIG. 3 is a side view showing a state where the in-vehicle electronic device in the embodiment of the present invention is removed from the vehicle, and FIG. 4 is a rear view showing the state in which the in-vehicle electronic device in FIG. 3 is removed from the vehicle. FIG. 5 is a block diagram showing a configuration of an in-vehicle electronic device according to an embodiment of the present invention.

  As shown in FIG. 1 and FIG. 2, reference numeral 1 is a portable car navigation device that is a type of in-vehicle electronic device, and includes a housing 10 and a display surface 20 including a liquid crystal monitor disposed in the housing 10. The mounting bracket 30, the navigation circuit unit 40 built in the housing 10, and the tilt detection unit 50 also built in the housing 10.

  Reference numeral 60 is a stand for attaching the portable car navigation apparatus 1 to a dashboard (not shown) of the vehicle. The stand 60 includes a stand column 601, a coupling portion 602 provided at one end of the stand column 601 for coupling to the mounting bracket 30, and a stand fixing unit 603 provided at the other end of the stand column 601. Yes. The stand fixing portion 603 fixes the stand column 601 to the dashboard.

  As shown in FIG. 3 and FIG. 4, the mounting bracket 30 includes a mounting plate 301 (see FIG. 3) formed entirely on the L-shape along the back and bottom surfaces of the housing 10. The coupling plate 302 is provided at a position corresponding to the back surface of the housing 10 and the screw hole 303 (see FIG. 4) formed at a position corresponding to the bottom surface of the housing 10. Bolts 70 are screwed into the screw holes 303, and the bolts 70 are screwed into screw holes (not shown) formed on the bottom surface of the housing 10 so that the mounting bracket 30 is fixed to the housing 10. It has become.

  The coupling portion 602 includes a coupling frame 604 to which the coupling plate 302 is coupled, and a lever 605 that releases the coupling plate 302 coupled to the coupling frame 604. The coupling plate 302 is slidably coupled to the coupling frame 604. The housing 10 is attached to the stand 60 by this connection. In order to release this mounting state, the lever 605 is pulled and the housing 10 is lifted upward, and the coupling plate 302 is slid upward with respect to the coupling frame 604. By this upward sliding, the coupling plate 302 is separated from the coupling frame 604 and released from the mounted state.

  Next, with reference to FIG. 5, the navigation circuit unit 40 and the inclination detection unit 50 built in the housing 10 of the portable car navigation device 1 will be described in detail.

  The navigation circuit unit 40 includes a current position detection unit 401, a main control unit 402, a display unit 403 for driving image data for displaying image information such as map data on the display surface 20, a sound output unit 404, and a data storage. Unit 405, ROM 406 as a main storage memory, RAM 407 for storing a program, lock control unit 408 for locking navigation circuit unit 40 to an inoperable state, an input password and a pre-registered password, A password determination unit 409 that determines whether the password matches, and a lock release unit 410 that releases the lock state by the lock control unit 408 based on the determination result by the password match by the password determination unit 409.

  The data storage unit 405 includes a map data storage area 411 for storing map data for route search, and a facility data storage area for storing data relating to various facilities such as hotels, parking lots, public facilities, and shopping centers. 412.

  The map data includes roads (routes) as nodes and node positions as inflection points, links as paths connecting the nodes, and cost information (distance and required time) of all links as data. The route search refers to this map data and sequentially searches for a link from the departure node to the destination node, and traces the node and link with the smallest cost information of the link as a guide route. As a result, the shortest route can be guided to the user. As such a route search method, a method called label determination method or Dijkstra method is used.

  When the optimum route from the starting point to the destination obtained by route search using the map data as described above is searched, guide route data is created. The guide route data includes road data and guidance data on the map in addition to the data of the optimum route, and is displayed on the display screen. Then, a guide route and a mark indicating the current position of the navigation device are superimposed on a map of a fixed scale and a fixed range including the current position measured by the current position detection unit 401, and the current position mark is placed at the center of the display screen. Display as follows. When the apparatus has a voice guidance function, guidance (guidance) to the user is performed by voice output.

  The inclination detection unit 50 detects that the portable car navigation apparatus 1 is inclined more than a predetermined angle from the state where it is attached to the vehicle. The detection output of the tilt detection unit 50 is supplied to the main control unit 402 to operate the lock control unit 408, lock the navigation circuit unit 40 in an inoperable state, and make the portable car navigation device 1 inoperable. It is supposed to be set.

  Next, the operation of the portable car navigation apparatus 1 configured according to the above-described embodiment of the present invention will be described.

  As shown in FIGS. 1 and 2, the portable car navigation device 1 is attached in a state of being suspended from a dashboard. This attachment is achieved by attaching the housing 10 to a stand 60 fixed to the dashboard. More specifically, the mounting bracket 30 is fixed to the housing 10 by bolts 70, and the coupling plate 302 of the mounting bracket 30 is coupled to the coupling frame 604 of the coupling portion 602 of the stand 60.

  The case where the portable car navigation apparatus 1 is detached from the dashboard will be described with reference to FIGS. Removal of the portable car navigation device 1 is performed by lifting the housing 10 upward with the lever 605 pulled down and sliding the coupling plate 302 away from the coupling frame 604.

  At the time of this removal, the portable car navigation device 1 is greatly inclined more than a predetermined angle. The inclination detection unit 50 detects an inclination greater than the predetermined angle. The detection output of the tilt detection unit 50 is sent to the main control unit 402, and the main control unit 402 operates the lock control unit 408 by this detection output to lock the operation of the navigation circuit unit 40. As a result, the navigation circuit unit 40 becomes inoperable. This locked state can be released by inputting a password preset by a proper owner.

  Therefore, even if the portable car navigation device 1 once removed due to the theft is to be attached to the dashboard of another vehicle and used again, it cannot be operated because it is locked in an inoperable state by the lock control unit 408. When a legitimate user reattaches to another vehicle due to replacement of the vehicle or the like, the password is input, the lock control unit 408 is controlled by the main control unit 402, and the locked state is released.

  A third party involved in the theft cannot use the registered password and cannot release the locked state. Therefore, the stolen portable car navigation device 1 cannot be used illegally. If the third party inputs an appropriate password and attempts to release the lock, the attempt is determined to be inconsistent by the password determination unit 409 and the unlock cannot be achieved.

  As described above, according to the present invention, the portable car navigation device 1 attached to the dashboard of the vehicle includes the inclination detection unit 50 that detects that the casing 10 is inclined at a predetermined angle or more for removal, Since the lock control unit 408 that locks the navigation circuit unit 40 in an inoperable state is provided and the lock control unit 408 is operated by the detection output of the tilt detection unit 50, the portable car navigation device 1 is removed. In some cases, the casing 10 is always tilted by a predetermined angle or more, so that the tilt detection unit 50 detects this, and the lock control unit 408 is activated to lock in an inoperable state.

  Therefore, since it is impossible to use the portable car navigation device 1, theft by the thief is suppressed. In particular, since the inclination detection unit 50, which is a detection unit that detects that the portable car navigation device 1 has been removed from the dashboard, is built in the housing 10, it cannot be intentionally malfunctioned from the outside.

  Such a built-in state of the inclination detection unit 50 is completely different from that of the sensor provided with the concave portion and the convex portion provided at the vehicle mounting portion and the sensor provided at the power connector as in the conventional example described above. It is stored. Therefore, the inclination detection unit 50 cannot be crafted from the outside unless the portable car navigation device 1 is destroyed, unlike the conventional one.

  On the other hand, since unlocking is achieved by inputting a password, it does not affect the use by re-installation after removal by the user. For example, after the user removes and reinstalls the portable car navigation device 1 for repair, the user can use the device by unlocking it by entering a password.

  In the above embodiment, the present invention has been described by taking a portable car navigation device as an example of an in-vehicle electronic device. However, the present invention is not limited to this and can be applied to other in-vehicle electronic devices.

FIG. 1 is a side view showing a state where an in-vehicle electronic device according to an embodiment of the present invention is attached to a vehicle. FIG. 2 is a perspective view showing a state in which the in-vehicle electronic device in FIG. 1 is attached to the vehicle as viewed from the back side. FIG. 3 is a side view showing a state where the in-vehicle electronic device in the embodiment of the present invention is removed from the vehicle. 4 is a perspective view showing a state in which the vehicle-mounted electronic device in FIG. 3 is removed from the vehicle as viewed from the back side. FIG. 5 is a block diagram showing the configuration of the in-vehicle electronic device according to the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Portable car navigation apparatus 10 .... Case 20 ... Display surface 30 ... Mounting bracket 40 ... Navigation circuit part 50 ... Tilt detection part 60- ... Stand 70 ... Bolt 301 ... Mounting plate 302 ... Coupling plate 401 ... Current position detection unit 402 ... Main control unit 403 ... Display unit 404 ... Audio output unit 405: Data storage unit 408 ... Lock control unit 409 ... Password determination unit 410 ... Lock release unit 601 ... Stand column 602 ... Coupling unit 603 ... Stand fixing unit 604・ Combined frame 605 ... Lever

Claims (3)

In in-vehicle electronic devices that are detachably mounted on vehicles,
The in-vehicle electronic device includes a lock control unit, and a removal detection unit provided in the main body of the in-vehicle electronic device,
The removal detection means is configured to detect that the attitude of the on-vehicle electronic device has changed when the on-vehicle electronic device is removed, and the lock control means is based on a detection output of the removal detection means. The vehicle-mounted electronic device is characterized in that the operation of the vehicle-mounted electronic device is locked in an impossible state.   The in-vehicle electronic device according to claim 1, wherein the removal detection unit is formed by an inclination detection unit that detects that the in-vehicle electronic device is inclined by a predetermined angle or more. The in-vehicle electronic device further includes a password determination unit and a lock release unit,
The password determination unit determines whether the input password matches a pre-registered password, and the lock release unit releases the lock by a match determination output from the password determination unit. Or the vehicle-mounted electronic device of Claim 2.

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