JP5685226B2 - Alarm device - Google Patents

Description

  The present invention relates to an alarm device.

  Conventionally, expensive electrical equipment such as car audio and car navigation is attached to an instrument panel of a vehicle. Such an expensive electric device may be stolen while parking for the purpose of resale or the like, and thus a device for suppressing theft has been made (for example, see Patent Document 1).

  In the electrical equipment removal notification device described in Patent Document 1, the attachment spring is grounded, the contact plate is set to a pole to which power is supplied, and the attachment key is brought into contact with the attachment spring to deform the attachment spring. In some cases, a configuration is disclosed in which a mounting spring is removed and brought into contact with a contact plate via a key to form a closed circuit to sound a buzzer.

JP 2002-347527 A

  However, in the conventional electrical equipment removal notification device, if the electrical equipment is forcibly removed by disassembling the instrument panel without using the removal key, the buzzer will not sound and the theft cannot be suppressed. There's a problem.

  This invention is made | formed in view of this point, The objective is to provide the alarm device which can detect reliably that the electric equipment was removed with a comparatively simple structure.

  The present invention is directed to an alarm device including a controller that detects a connection state with an electrical device when a vehicle security system is on and performs a predetermined alarm operation based on the detection result. The solution was taken.

That is, in the first invention, the side wall surface of the electric device is formed of a metal ground plate,
The controller includes an electric wire electrically connected to the ground plate of the electric device, a determination unit that determines whether the electric wire is grounded via the ground plate of the electric device, and the determination unit determines whether the electric wire is A notification unit that performs the alarm operation when it is determined that the controller is disconnected from the ground state, and a pull-up circuit that can perform a switching operation to intermittently turn on or off the power to the controller;
The pull-up circuit performs the switching operation when the electrical device is not operating, and switches so that energization to the controller is always on when the electrical device is operating. To do.

  In 1st invention, the electric wire of a controller is electrically connected to the ground plate of an electric equipment. Then, in the determination unit, when the vehicle security system is in the on state, it is determined whether the electric wire is grounded via the grounding plate of the electric device, and when it is determined that the electric wire is removed from the ground state, An alarm operation is performed by the notification unit.

  With such a configuration, it is possible to reliably detect that the electrical device has been removed with a relatively simple configuration. In other words, when the electric device is stolen, the electric wire is removed from the grounded state, so that it is detected and an alarm operation for the suspicious person is performed. Thereby, theft of an electric equipment can be suppressed.

  In addition, the controller pull-up circuit is intermittently switched on or off. Here, when the electric device is operating, the pull-up circuit is switched so as to be always on.

  With such a configuration, it is possible to prevent the electric device from being affected by noise generated by the controller. Specifically, the controller performs a switching operation for switching energization on or off by a pull-up circuit when confirming the on or off state of various signals of the vehicle. Such a switching operation is performed for the purpose of reducing current consumption, but noise is generated along with the switching operation. Here, since the controller wires are electrically connected to the ground plate on the side wall surface of the electrical equipment, noise generated by the switching operation affects the electrical equipment side through the electrical wires, and the screen display of the electrical equipment There is a risk of problems such as flickering.

  On the other hand, in the present invention, the pull-up circuit is always turned on when the electric device is operating, so that the generation of noise associated with the switching operation is suppressed and the electric device is not affected by the noise. be able to.

According to a second invention, in the first invention,
The controller, when the electric device is applied to the vehicle and electrically connected to the battery of the vehicle , the controller determines that the electric wire and the ground plate are not grounded. It is characterized by performing a warning operation.

In the second invention, when the electric device is applied to the vehicle and electrically connected to the battery of the vehicle, the connection state between the electric wire and the ground plate is detected. Then, a predetermined warning operation is performed based on the detection result.

  With such a configuration, it is possible to reliably detect a contact failure between the electric device and the electric wire with a relatively simple configuration. Specifically, once the connection state between the electric device and the electric wire is secured and attached to the instrument panel of the vehicle, it cannot be visually recognized from the outside. For this reason, when there is a problem such as forgetting to install the electric wire when the product is applied to the vehicle or when the fastening screw is loosened due to aging, there is a possibility that the worker or user who performed the construction may miss it.

  Therefore, when an electrical device is attached to the instrument panel of the vehicle (when the electrical device is installed in the vehicle) or when the user starts the engine, the connection state with the electrical device is detected, so that the warning operation to the user It is possible to recognize an attachment failure of the electric wire.

  In the above description, it is assumed that an action for a suspicious person is an alarm action, and an action for a user is distinguished as a warning action, for example, a buzzer sound, a lamp emission color, a blinking interval, and the like are different from each other. However, the alarm operation and the warning operation may be the same operation.

  According to the present invention, with a relatively simple configuration, it is possible to reliably detect that the electrical device has been removed and that a contact failure between the electrical device and the electric wire has occurred. In other words, when the electric device is stolen, the electric wire is removed from the grounded state, so that it is detected and an alarm operation for the suspicious person is performed. Thereby, theft of an electric equipment can be suppressed.

  In addition, by determining whether the controller's electric wire is grounded, the connection state between the electric device and the electric wire is detected, so even if there is a problem such as a loosening screw due to aging deterioration. Therefore, it is possible to recognize a wire installation failure by a warning operation to the user.

It is the schematic which shows the structure of the alarm device which concerns on embodiment of this invention. FIG. 6 is a timing chart illustrating a pull-up circuit switching operation. It is a flowchart figure which shows the operation | movement procedure of an alarm device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a schematic diagram illustrating a configuration of an alarm device according to an embodiment of the present invention. As shown in FIG. 1, the alarm device 10 includes a controller 20, detects a connection state with the electric device 15 attached to the instrument panel 11 of the vehicle C, and performs a predetermined alarm operation based on the detection result. Or perform a warning action.

  The electrical device 15 is, for example, a car audio device or a car navigation device, and is fitted into and attached to the opening hole 11a of the instrument panel 11 of the vehicle C. The side wall surface of the electrical device 15 is formed of a grounded metal ground plate 15a. A battery 12 is connected to the electrical device 15 and operates when the ignition key is turned to the ACC position.

  The controller 20 is electrically connected to the ground plate 15 a of the electric device 15 through the electric wire 21. Specifically, a spectacle terminal 21a is provided at the tip of the electric wire 21, and the spectacle terminal 21a is fastened and fixed to the ground plate 15a of the electric device 15 by a fastening screw 21b.

  A battery 12 is connected to the controller 20, and a switching operation for intermittently switching on or off the energization of the controller 20 is performed by a pull-up circuit 22 built in the controller 20. As described above, if the controller 20 is not always energized but intermittently energized, the current consumption can be reduced.

  By the way, in the pull-up circuit 22, noise is generated along with the switching operation. Since the electric wire 21 of the controller 20 is electrically connected to the ground plate 15a of the electric device 15, noise generated by the switching operation affects the electric device 15 side through the electric wire 21, and the electric device 15 May cause problems such as flickering on the screen.

  Therefore, in the present embodiment, the pull-up circuit 22 is switched so as to be always on when the electrical device 15 is operating (see FIG. 2). In this way, it is possible to suppress the generation of noise associated with the switching operation and prevent the electrical device 15 from being affected by noise on the controller 20 side.

  The controller 20 includes a control unit 25 and a notification unit 28 that performs a predetermined alarm operation or warning operation. For example, the control unit 25 controls the switching operation of the pull-up circuit 22 and controls the alarm operation or warning operation of the notification unit 28. The notification unit 28 operates, for example, an alarm buzzer, a warning buzzer, an alarm lamp, a warning lamp, and the like. Here, it is assumed that the notification unit 28 distinguishes an operation for a suspicious person as an alarm operation and distinguishes an operation for a user as a warning operation, for example, a buzzer sound, a lamp emission color, a blinking interval, and the like are different from each other. However, the alarm action and the warning action may be the same action.

  The controller 20 is connected to a vehicle control unit 30 that controls operations of the horn 16, the hazard lamp 17, the LED lamp 18, and the buzzer 19 of the vehicle C. Therefore, in addition to sounding an alarm buzzer or flashing an alarm lamp in the notification unit 28, an operation signal is output to the vehicle control unit 30 to sound the horn 16 or the buzzer 19 or to turn on the hazard lamp 17 or the LED lamp 18. By blinking, an alarm operation or a warning operation can be performed.

  The vehicle control unit 30 receives a detection signal from the security system 31 that detects when there is an intruder into the vehicle C or that the vehicle C has been harmed, or the engine 32 is operated in conjunction with an ignition key. Disable start.

  The control unit 25 includes a determination unit 26 that determines whether the electric wire 21 is grounded via the ground plate 15 a of the electric device 15. When it is determined that the electric wire 21 is not grounded, the notification unit 28 performs a predetermined alarm operation or warning operation.

  Here, the theft determination by the determination unit 26 is performed when the security system is turned on. That is, when the electric device 15 is stolen and the electric wire 21 of the controller 20 is disconnected from the electric device 15 or when the electric device 15 is disconnected from the ground side of the battery 12, the electric wire 21 is not grounded and an alarm operation is performed. Therefore, the theft of the electric device 15 can be suppressed.

  The construction check determination by the determination unit 26 when the electrical device 15 is applied to the vehicle C is, for example, 1 minute when the electrical device 15 is attached to the instrument panel 11 and the battery 12 is connected, or the battery 12 is connected. You only need to do it the first time when you set security for the first time. Thereby, even when there is a problem such as the fastening screw 21b being loosened when the electric wire 21 is connected, the installation person or the inspector can recognize the attachment defect of the electric wire 21 by the warning operation.

  Moreover, you may make it perform construction check determination for 1 minute every time after setting security, or at the time of vehicle travel start. Thereby, even if the attachment of the electric wire 21 is loosened due to aging and a contact failure between the electric device 15 and the electric wire 21 occurs, the user can recognize the defect by the warning operation.

  Next, operation | movement of the alarm device 10 is demonstrated using the flowchart figure of FIG. As shown in FIG. 3, first, in step S101, it is determined whether the security system is on. The security system is turned on when, for example, the user stops the engine, gets off the vehicle C and locks the door. If “YES” at step S101, the process branches to step S102. If “NO” at step S101, the process branches to step S104.

  In step S <b> 102, it is determined whether the electric wire 21 of the controller 20 has been removed from the state of being grounded via the ground plate 15 a of the electric device 15. If the determination in step S102 is “YES”, it is determined that the connection state is abnormal, that is, the electric device 15 has been stolen and the electric wire 21 has been removed from the electric device 15, and the process proceeds to step S103. When the determination in step S102 is “NO”, it is determined that the connection state is normal and the process waits.

  In step S <b> 103, the notification unit 28 performs a warning operation for the suspicious person. Here, examples of the alarm operation include sounding an alarm buzzer of the notification unit 28 and blinking an alarm lamp. In addition, an operation signal is output to the vehicle control unit 30 connected to the controller 20. Then, the horn 16 and the buzzer 19 of the vehicle C may be sounded, or the hazard lamp 17 and the LED lamp 18 may be blinked.

  In step S104 after it is determined that the security system is off, it is determined whether the engine has been started. If “YES” at step S104, the process branches to step S105. If the determination in step S104 is “NO”, the process waits until the engine is started. The determination in step S104 may be performed for one minute after the battery 12 is connected or only when the security is set for the first time after the battery 12 is connected.

  In step S105, it is determined whether the electric wire 21 of the controller 20 is grounded via the ground plate 15a of the electric device 15. When the determination in step S105 is “YES”, it is determined that the connection state between the electric device 15 and the electric wire 21 is normal, and waits. When the determination in step S105 is “NO”, the electrical device 15 and the electric wire 21 are in an abnormal connection state between the electric device 15 and the electric wire 21, that is, due to a malfunction such as the fastening screw 21b being loosened due to aging. If it is determined that a contact failure with is occurring, the process proceeds to step S106.

  In step S106, a warning operation for the user is performed by the notification unit 28. Here, examples of the warning operation include sounding a warning buzzer of the notification unit 28 and blinking a warning lamp. In addition, an operation signal is output to the vehicle control unit 30 connected to the controller 20. Then, the horn 16 and the buzzer 19 of the vehicle C may be sounded, or the hazard lamp 17 and the LED lamp 18 may be blinked.

  In the present embodiment, for example, it is assumed that the alarm operation and the warning operation can be distinguished by making the buzzer sound, the emission color of the lamp, the blinking interval, and the like different from each other. And the warning action may be the same action.

  As described above, according to the alarm device 10 according to the present embodiment, it is possible to reliably detect the removal of the electric device 15 with a relatively simple configuration. That is, when the electric device 15 is stolen and the electric wire 21 of the controller 20 is disconnected from the electric device 15, the electric wire 21 is not grounded and an alarm operation is performed. Thereby, theft of the electric equipment 15 can be suppressed.

  Further, since the connection state between the electric device 15 and the electric wire 21 is detected by determining whether the electric wire 21 of the controller 20 is grounded, the fastening screw 21b is loosened when the electric wire 21 is connected. Even if there is a problem, it can be recognized by a warning action.

  As described above, the present invention has a highly practical and industrial applicability because it has a relatively simple configuration and can reliably detect that an electrical device has been removed. Is expensive.

DESCRIPTION OF SYMBOLS 10 Alarm apparatus 15 Electric equipment 15a Ground plate 20 Controller 21 Electric wire 22 Pull-up circuit 26 Judgment part 28 Notification part 31 Security system 32 Engine C Vehicle

Claims (2)

When a vehicle security system is in an on state, an alarm device including a controller that detects a connection state with an electrical device and performs a predetermined alarm operation based on the detection result,
The side wall surface of the electrical device is formed of a metal ground plate,
The controller includes an electric wire electrically connected to the ground plate of the electric device, a determination unit that determines whether the electric wire is grounded via the ground plate of the electric device, and the determination unit determines whether the electric wire is A notification unit that performs the alarm operation when it is determined that the controller is disconnected from the ground state, and a pull-up circuit that can perform a switching operation to intermittently turn on or off the power to the controller;
The pull-up circuit performs the switching operation when the electrical device is not operating, and switches so that energization to the controller is always on when the electrical device is operating. Alarm device to play. In claim 1,
The controller, when the electric device is applied to the vehicle and electrically connected to the battery of the vehicle , the controller determines that the electric wire and the ground plate are not grounded. An alarm device configured to perform a warning operation.

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