JP2009193393A - Case body detachment detector for electronic device whose case body is fixed to mobile object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable case body detachment detector for an electronic device, for preventing illegal act such as robbery and illegal fishing at a low manufacture cost. <P>SOLUTION: The case body detachment detector for the electronic device fixed to a conductive holding member of a mobile object by a pair of conductive connection members is provided with: a conduction detection means for detecting conduction between a pair of electrodes 9c and 9c electrically connected to the connection members; and an information transmission means. When the conduction detection means detects non-conduction between the electrodes 9c and 9c, the information transmission means transmits the information on the detachment of the case body including an ID of the electronic device. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic device of a moving body such as a ship or an automobile, and particularly relates to a housing removal detection device.

  2. Description of the Related Art Conventionally, electronic devices such as a self-position transmission device and a navigation device have been used for mobile bodies such as ships and automobiles. Such an electronic device desirably has a theft prevention function and an unauthorized use prevention function. The navigation device disclosed in Japanese Patent Laid-Open No. 2002-62145 stores the current position information in the storage unit 4 when the power is turned off, and then stores the current position information first when the power is turned on. Compared with the position information, the navigation operation is not performed if they do not match.

  Even if the navigation device is detached from the vehicle and attached to another vehicle with such a configuration, the navigation operation is not performed and the navigation device cannot be used. If the operation of such a navigation device is known, an anti-theft effect can be obtained.

  The navigation device disclosed in Japanese Patent Application Laid-Open No. 2002-62145 includes means for storing current position information for theft prevention, next, position information previously stored with position information when the power is turned on. Since the means for comparing and the means for disabling the navigation operation are required, there is a problem that the apparatus becomes complicated and the manufacturing cost increases. Furthermore, there is also a problem that when there is a theft, it cannot be notified at the time of theft.

  FIG. 6 and FIG. 7 show a local position transmission device used in a conventional ship. This own position transmitting device 20 is attached to a ship and automatically transmits the own position of the ship. In other words, a GPS device for specifying the own position is provided, and a signal indicating the own position is transmitted to the monitoring base station that is monitoring via the satellite. Moreover, it has a unique ID at the same time, and the ID is also transmitted simultaneously.

  A detection switch 21 is provided in the housing of the self-position transmission device 20, and when the housing is fixed to the holding bracket 22 with a bolt 23, the detection switch 21 is turned on. In this state, the self-position transmission device 20 is normal. To work. FIG. 6A shows a state before the self-position transmitting device 20 is attached to the holding metal fitting 22. At this time, the actuator of the detection switch 21 protrudes from the housing and the detection switch 21 is turned off. FIG. 6B shows a state in which the self-position transmitting device 20 is attached to the holding bracket 22. At this time, the actuator of the detection switch 21 is pushed into the housing by the holding bracket 22 and the detection switch 21 is turned on. Yes.

  As shown in FIG. 7, when the self-position transmitter 20 is removed from the holding bracket 22, the actuator of the detection switch 21 protrudes from the housing and the detection switch 21 is turned off. When the detection switch 21 is turned off, the local position transmission device 20 transmits the information and the ID removed from the holding bracket 22. In this way, illegal operations such as intrusion of territorial waters are monitored.

  Since the conventional self-position transmitting apparatus shown in FIGS. 6 and 7 uses a detection switch, there is a problem in that it requires parts cost and assembly cost for mounting the detection switch. There is also a problem that reliability is impaired due to a defective detection switch.

In addition, since the detection switch is provided in a place where it can be seen from the outside, when you try to operate illegally by removing your position transmitter, you may craft the detection switch to prevent illegal operations such as intrusion of territorial waters from being detected. It was possible.
JP 2002-62145 A, paragraphs 0019 to 0026, FIG.

  The present invention has been made in view of the above points, and the object of the present invention is to remove the casing of an electronic device for preventing fraud such as theft and illegal operation with low manufacturing cost and high reliability. It is to provide a detection device.

  According to another aspect of the present invention, there is provided a housing removal detection device for an electronic device, which is fixed to a conductive holding member of a moving body with a pair of conductive connection members, and is electrically connected to the connection member. A casing including a conduction detecting means between a pair of connected electrodes and an information transmitting means, and when the conduction detecting means detects non-conduction between the electrodes, the information transmitting means includes an ID of the electronic device Information on removal is transmitted.

  According to another aspect of the present invention, there is provided a device removal detection device for an electronic device, which is fixed to a conductive holding member of a moving body with a pair of conductive connection members. Continuity detecting means between a pair of electrodes connected to each other and information transmitting means, and while the continuity detecting means detects continuity between the electrodes, the information transmitting means periodically transmits information. When the continuity detecting means detects non-conduction between the electrodes, the information transmitting means stops transmitting the information.

  Further, in the housing removal detection device of each electronic device, the electronic device includes a GPS receiving device, and transmits data on its own location acquired by the GPS receiving device together with housing removal information including the ID, or information Is to stop sending.

  Moreover, in the said housing removal detection apparatus of each said electronic device, it is applied to the self-position transmission apparatus attached to a ship.

  According to the case detachment detection apparatus for an electronic device in which the case is fixed to the moving body of the present invention, information can be obtained to prevent fraud such as highly reliable theft and illegal operation, and the manufacturing cost is low.

  The best mode for carrying out the present invention will be described below with reference to examples.

  1 is a block diagram showing a position transmitter 11 according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view showing the position transmitter 11, and FIG. 3 shows the position transmitter 11 in a direction perpendicular to the cross section of FIG. It is sectional drawing which shows a cross section.

  The control unit 2 shown in FIGS. 1 to 3 is composed of electronic components mounted on a printed circuit board, and controls the entire apparatus. The GPS module 3 receives a signal transmitted from a GPS artificial satellite via the antenna 4, calculates a local position signal, and outputs the signal to the control unit 2.

  The control unit 2 is connected to the housing removal detection device 9, and when the detection device 9 is on, the own position signal obtained from the GPS module 3 and the device-specific ID are periodically sent to the satellite communication module 5. Output.

  The satellite communication module 5 generates a transmission signal based on the self-position signal input from the control unit 2 and the device-specific ID, amplifies the power, and transmits the signal as a radio wave from the satellite communication antenna 6. This radio wave is transmitted to the ship monitoring station via the communication satellite.

  When the housing removal detection device 9 is turned off, the control unit 2 transmits a signal indicating that the housing of the position transmission device has been removed, the own position signal, and the ID to the ship monitoring station in the same manner as described above. The battery 7 supplies power to the control unit 2, the GPS module 3, and the GPS module 3. The control unit 2 outputs a self-position signal to the connector 8, and when the display device 10, which is an external device, is connected to the connector 8, the map screen and the self-position are displayed on the display device 10.

  Next, the structure of the housing removal detection device 9 will be described with reference to FIG. The control unit (printed circuit board) 2, the GPS module 3, the GPS antenna 4, the satellite communication module 5, the satellite communication antenna 6 and the battery 7 are the lower casing 1b made of a non-conductive resin as shown in FIGS. And the upper casing 1a are accommodated in a casing 1 formed by fastening with bolts 23, 23. The connector 8 is formed on the lower housing 1b.

  The housing removal detection device 9 is formed by an insert nut 9a, a bolt 9b, and a washer 9c shown in FIG. The insert nut 9a is insert-molded so as to be embedded in a boss 1c formed in the lower housing 1b. Two insert nuts 9a and 9a are embedded in each boss 1c and 1c.

  Bolts 9b and 9b are screwed onto the insert nuts 9a and 9a via washers 9c and 9c. The washers 9c and 9c are two electrodes that form a closed circuit by being connected to two conductive film patterns of the printed circuit board constituting the control unit 2 via the cords 9d and 9d, respectively.

  The lower casing 1b is fixed to the holding metal fitting 22 by screwing a bolt through the hole of the holding metal fitting 22 used in the conventional example to the lower side of the insert nut 9a, 9a, and the insert nut 9a, 9a. And the washer 9c and 9c will be in a conduction | electrical_connection state with a volt | bolt and the holding | maintenance metal fitting 22. FIG.

  When the lower housing 1 b is removed from the holding metal fitting 22, the washers 9 c and 9 c are in a non-conductive state, and it is detected that the housing 9 has been removed from the holding metal fitting 22. Thus, the housing removal detection device 9 that reliably detects that the housing 9 has been removed can be configured with a simple configuration.

  FIG. 5 is a cross-sectional view showing a portion of a position transmitting device that is Embodiment 2 of the present invention. In this example, the housing removal detection device 9 described in FIG. 4 of the first embodiment is replaced with the housing removal detection device shown in FIG. More specifically, the washer 9c of the first embodiment is replaced with the printed board 2.

  And the bolt 9b which penetrates the hole of the printed circuit board 2 in the same insert nut 9a as Example 1 is screwed. Around the hole of the printed circuit board 2, a conductive film pattern for forming two electrodes is provided. Other configurations are the same as those of the first embodiment, and the housing removal detection device can be obtained also with such a configuration. In this example, since the washers 9c and 9c connected to the conductor film of the printed circuit board 2 used in the first embodiment are not necessary, the assembly process is simplified.

  The embodiment is configured as described above, but the invention is not limited to this. For example, when the housing removal detection device 9 is turned off, the transmission of the position information and the like that was periodically transmitted is stopped. Also good.

  Further, when the present invention is applied to an in-vehicle navigation device and the in-vehicle navigation device is removed from the vehicle, the information can be transmitted via a mobile phone or the like.

It is a block diagram which shows the position transmitter which is Example 1 of this invention. It is sectional drawing which shows the same position transmitter. It is sectional drawing which shows the cross section of the same position transmitter in the direction orthogonal to the cross section of FIG. It is sectional drawing which shows the part of the position transmitter. It is sectional drawing which shows the part of the position transmitter which is Example 2 of this invention. FIG. 6A is a side view showing a state before the conventional position transmission device is attached, and FIG. 6B is a side view showing the attachment state of the position transmission device. It is a side view which shows the removal state of the same position transmitter.

Explanation of symbols

1 casing, 1a upper casing, 1b lower casing, 1c boss 2 control unit (printed circuit board)
3 GPS module 4 GPS antenna 5 Satellite communication module 6 Satellite communication antenna 7 Battery 8 Connector 9 Housing removal detection device, 9a Insert nut, 9b Bolt, 9c Washer 9d Code 10 Display device 11 Position transmission device 20 Position transmission device 21 Detection switch 22 Holding bracket 23 Bolt

Claims (4)

An apparatus for detecting removal of a casing of an electronic device fixed to a conductive holding member of a moving body with a pair of conductive connecting members, wherein a means for detecting conduction between a pair of electrodes electrically connected to the connecting member; And an information transmission means, and when the continuity detection means detects non-conduction between the electrodes, the information transmission means transmits a case removal information including an ID of the electronic device. apparatus. An apparatus for detecting removal of a casing of an electronic device fixed to a conductive holding member of a moving body with a pair of conductive connecting members, wherein a means for detecting conduction between a pair of electrodes electrically connected to the connecting member; Information transmitting means, while the continuity detecting means detects continuity between the electrodes, the information transmitting means periodically transmits information, and the continuity detecting means is not connected between the electrodes. A device removal detection device for an electronic device in which when the continuity is detected, the information transmitting means stops transmitting the information. 3. The electronic device housing removal according to claim 1, further comprising a GPS receiving device, and transmitting the data of the own position acquired by the GPS receiving device together with the housing removal information including the ID, or stopping the transmission of information. Detection device. The case removal detection device for an electronic device according to any one of claims 1 to 3, which is used in a self-position transmission device attached to a ship.

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