JP4285182B2 - Vehicle anti-theft system and vehicle anti-theft method using the same - Google Patents

Description

  The present invention relates to a vehicle theft prevention system for preventing a vehicle theft and a vehicle theft prevention method using the same.

2. Description of the Related Art Conventionally, as a device for preventing vehicle theft, for example, a vehicle theft prevention device configured to detect a theft act on a vehicle from unauthorized opening / closing of a door or occurrence of vibration and act as an alarm device to threaten the theft Various proposals have been made. Also, in order to notify the vehicle owner or user of the occurrence of the theft, a theft detection signal is transmitted by radio waves when the theft occurs, and this is received by a control panel provided in the house. Attempts have also been made to turn on a dedicated warning light or the like (for example, see Patent Document 1).
JP-A-8-167081 (page 3, FIG. 4)

  However, a vehicle antitheft device configured to threaten a theft by the operation of an alarm device is less effective for a theft who does not feel a threat to the operation of the alarm device, especially for handling this type of antitheft device. It is assumed that a familiar theft addict will break the alarm device and go into theft, and the current situation is that a satisfactory anti-theft effect cannot always be obtained.

  Further, as described in Patent Document 1, when a theft occurs, a dedicated warning light provided in the house is turned on to notify the vehicle owner or user of the occurrence of the theft. In the configuration, the owner or user of the vehicle can also expect to drive away the stolen person or seize the stolen person, but confronting the stolen person is dangerous and should be avoided if possible. desirable. In addition, providing a dedicated warning light for preventing theft of the vehicle leads to an increase in cost, and improvement is desired from the viewpoint of cost.

  The present invention was devised in view of the conventional situation as described above, and can give a psychological pressure to the theft without the owner or user of the vehicle confronting the theft. Another object of the present invention is to provide a vehicle anti-theft system capable of exhibiting a high anti-theft effect with an inexpensive configuration and a vehicle anti-theft method using the same.

  As a result of intensive studies to achieve the above object, the present inventor makes the vehicle owner or user think that the theft of the vehicle has been noticed in order to give a psychological pressure to the theft. It is extremely effective, and it has been found that a theft against a vehicle can be effectively prevented by giving such a psychological pressure to the theft.

  The present invention was created based on the above knowledge, and when the in-vehicle theft detection device detects the theft of a vehicle, the in-vehicle transmitter transmits a theft detection signal, and the The signal is received by a receiver installed in the house where the vehicle is parked, and the lighting device installed in the house is turned on.

  Here, as the illuminating device, an existing illuminating device such as an illuminating device for illuminating a room or the like is used. In the present invention, the lighting device is turned on in conjunction with the detection of the theft by the in-vehicle theft detection device, thereby making it possible for the thief who performs the theft to think that the theft was noticed by the vehicle owner. Can give a feeling of psychological pressure.

  According to the present invention, the lighting device installed in the house where the vehicle is parked is turned on in conjunction with the detection of the theft by the in-vehicle theft detection device, and the theft is handled by the owner or user of the vehicle. Therefore, it is possible to give a psychological pressure to the theft without confronting the theft, and to exert a high anti-theft effect.

  In addition, according to the present invention, since it is configured to give a feeling of psychological pressure to the theft by lighting an existing lighting device in the house, for example, it is not necessary to separately install a dedicated warning light or the like, and is inexpensive. A high antitheft effect can be exhibited with a simple configuration.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic configuration diagram schematically showing a configuration example of a vehicle antitheft system to which the present invention is applied. This vehicle antitheft system lights the lighting devices 3a and 3b installed in the home of the owner of the vehicle in conjunction with detection of the theft by the in-vehicle antitheft device 1 mounted on the vehicle. It has a great feature in that it makes the thief think that the act was noticed by the owner of the vehicle, and gives a psychological pressure to the thief, thereby effectively preventing theft of the vehicle It is.

  In order to achieve this, a vehicle-mounted transmitter 2 that transmits a theft detection signal is mounted on the vehicle together with the vehicle-mounted theft detection device 1. In addition to the lighting devices 3a and 3b, receivers 4a and 4b that receive a theft detection signal transmitted from the in-vehicle transmitter 2 are installed at the home of the owner of the vehicle. Furthermore, remote control transmitters 5a and 5b and remote control receivers 6a and 6b for controlling the lighting devices 3a and 3b by remote operation are provided. The remote control receiver 6a is provided in the lighting device 3a, and the remote control receiver 6b is provided in the lighting device 3b. Are attached to each. The receiver 4a is configured integrally with the remote control transmitter 5a, and the receiver 4b is configured integrally with the remote control transmitter 5b.

  The lighting devices 3a and 3b are existing lighting devices for illuminating the interior of the vehicle owner's home. Particularly, in the present embodiment, the vehicle owner's home is a two-story building. An example in which the lighting device 3a that illuminates the room on the upper floor and the lighting device 3b that illuminates the room on the lower floor are used in the vehicle antitheft system will be described.

  The in-vehicle theft detection device 1 detects a theft act on a vehicle, and includes a controller 11 that controls the operation of the in-vehicle theft detection device 1 as shown in FIG. The controller 11 includes, for example, a keyless receiver 12 that receives a keyless entry signal instructing locking or unlocking of a door from a vehicle key, a door opening / closing detection switch 13 that detects an open / closed state of the vehicle door, and unlocking of the vehicle door. Various switches such as a door lock / unlock state detection switch 14 for detecting the lock state, a vibration sensor 15 for detecting the vibration of the vehicle, an infrared sensor 16 for detecting the intrusion of the human body into the vehicle interior, and a voltage change in the electric circuit system Various sensors such as a voltage sensor 17 are connected. The controller 11 is connected with a horn 18, a hazard lamp 19, a sound reproducing device 20, and the like. Furthermore, in the vehicle antitheft system to which the present invention is applied, the onboard transmission is transmitted to the controller 11 of the onboard antitheft device 1. Machine 2 is connected.

  The in-vehicle theft detection device 1 configured as described above is set to a detection standby state for a theft act triggered by the reception of a keyless signal instructing locking of the vehicle door by the keyless receiver 12. When it is determined that an unauthorized opening / closing of the vehicle door has been performed based on signals from the door opening / closing detection switch 13 and the door lock / unlock state detection switch 13 while being in the detection standby state for theft. When the vibration sensor 15 detects a vibration of a predetermined value or more, when the infrared sensor 16 detects the intrusion of a human body into the vehicle interior, the voltage sensor 17 causes an abnormal voltage drop in the electric circuit system. When detected, the controller 11 determines that the vehicle has been stolen, and warns the theft by sounding the horn 18 or turning on the hazard lamp 19.

  Further, when the controller 11 determines that the theft has been performed on the vehicle, the controller 11 operates the audio reproducing device 20 to reproduce the pre-recorded audio, thereby threatening the theft. Here, various sounds can be considered to be reproduced by the audio reproducing device 20 in order to threaten the theft. From the viewpoint of making the theft think that the theft was noticed by the owner of the vehicle, for example, It is extremely effective to record in advance the sound of the vehicle owner going down the stairs at home, and to reproduce the sound by the sound reproducing device 20 when the theft is performed.

  The in-vehicle transmitter 2 transmits a theft detection signal when the in-vehicle theft detection device 1 detects a theft act on the vehicle. The in-vehicle transmitter 2 is connected to the controller 11 of the in-vehicle antitheft device 1 as described above. When the controller 11 determines that the theft has been performed on the vehicle, for example, wireless communication is performed. A theft detection signal indicating the occurrence of the theft is transmitted using radio waves or the like. Here, in particular, the in-vehicle transmitter 2 according to the present embodiment has a built-in timer circuit, and can transmit the theft detection signal a plurality of times at a predetermined time interval. Specifically, this in-vehicle transmitter 2 is for receiving, for example, one receiver 4a installed in the vehicle owner's home immediately after the in-vehicle theft detection device 1 detects the theft of the vehicle. Send a theft detection signal. Then, after counting for a predetermined time by the timer circuit, a theft detection signal for transmitting the signal to the other receiver 4b installed at the home of the vehicle owner is transmitted.

  The receivers 4a and 4b are installed at the home of the vehicle owner and receive a theft detection signal transmitted from the in-vehicle transmitter 2. One of these receivers 4a is installed on the upper floor side of the vehicle owner's home, and the other receiver 4b is installed on the lower floor side of the vehicle owner's home. In this embodiment, in particular, one receiver 4a is configured integrally with a remote control transmitter 5a for controlling the lighting device 3a on the upper floor side by remote operation, and the receiver 4a and the remote control transmitter 5a are combined. It is designed to work together. Further, the other receiver 4b is configured integrally with a remote control transmitter 5b for controlling the lower floor side lighting device 3b by remote operation so that the receiver 4b and the remote control transmitter 5b can operate in cooperation with each other. It has become.

  The remote control transmitters 5a and 5b transmit illumination control signals for controlling the illumination devices 3a and 3b, for example, using infrared rays or the like in accordance with the switch operation by the operator. In particular, in the present embodiment, as described above, the remote control transmitter 5a is configured integrally with the receiver 4a, and the remote control transmitter 5b is configured integrally with the receiver 4b, and the receiver 4a transmits from the in-vehicle transmitter 2. When the received theft detection signal is received, the remote control transmitter 5a transmits an illumination control signal for instructing lighting of the upper floor side illumination device 4a to the remote control receiver 6a, and the receiver 4b is transmitted from the in-vehicle transmitter 2. When the transmitted theft detection signal is received, the remote control transmitter 5b transmits an illumination control signal for instructing lighting of the lower floor side illumination device 4b to the remote control receiver 6b.

  The remote control receivers 6a and 6b receive the illumination control signals transmitted from the remote control transmitters 5a and 5b, and control the illumination devices 3a and 3b according to the received illumination control signals. In this embodiment, in particular, one of the remote control receivers 6a and 6b is attached to the upper floor side lighting device 3a, and the other remote control receiver 6b is connected to the lower floor side lighting device 3b. Is attached.

  Specifically, the remote control receivers 6a and 6b (hereinafter, collectively referred to as the remote control receiver 6 when they are not particularly distinguished) are, for example, a casing 21 formed in a substantially cylindrical shape as shown in FIG. And an electric circuit board on which a remote control receiving circuit or the like is formed is housed, and one end face of the housing 21 is provided with lighting devices 3a and 3b (hereinafter referred to as a lighting device unless particularly distinguished from each other). 3), the engagement groove 21a is formed in which the hooking blade 22a provided on the connector 22 is engaged. Further, as shown in FIG. 4, the other end face of the casing 21 of the remote control receiver 6 is engaged with an engagement groove 23a formed in a hooking ceiling 23 which is a power distribution device installed on the ceiling portion of the house. A hooking blade 21b is provided. Then, the remote control receiver 6 engages the hooking blade 21b of the housing 21 with the engaging groove 23a of the hooking ceiling 23 and engages the hooking blade 22a of the connector 22 of the lighting device 3 with the engaging groove 21a. By doing so, the hook ceiling 23 and the lighting device 3 are interposed.

  Note that the engagement groove 23 a of the hook ceiling 23 and the hook plug blade 22 a of the connector 22 of the lighting device 3 are standardized, and the engagement groove 21 a formed in the housing 21 of the remote control receiver 6. The hooking blade 21b is in conformity with this standard.

  Among such remote control receivers 6, the remote control receiver 6 a attached to the lighting device 3 a on the upper floor side detects theft transmitted from the in-vehicle transmitter 2 in conjunction with the detection of the theft by the in-vehicle theft detection device 1. When a signal is received by the receiver 4a and an illumination control signal for instructing lighting of the illumination device 4a is transmitted from the remote control transmitter 5a, the illumination control signal is received, and control corresponding to the illumination control signal is performed. Turn on 4a. The remote control receiver 6b attached to the lower floor side lighting device 3b receives the theft detection signal transmitted from the in-vehicle transmitter 2 in conjunction with the detection of the theft by the in-vehicle theft detection device 1 by the receiver 4b. When an illumination control signal for instructing lighting of the lighting device 4b is transmitted from the remote control transmitter 5b, the lighting control signal is received and control is performed in accordance with the received illumination control signal to turn on the lighting device 4b.

  Here, an outline of the operation of the vehicle antitheft system of the present embodiment configured as described above will be briefly described with reference to the flowchart of FIG.

  First, when the vehicle is parked in a parking lot or the like near the owner's home and the vehicle door is locked by a keyless signal from the vehicle key, the in-vehicle theft detection device 1 is placed in a detection theft state of the theft (step S1). ). Then, if the theft acts on the parked vehicle while the in-vehicle theft detection device 1 is in the detection standby state for the theft, the in-theft detection device 1 detects the theft. (Step S2).

  When a theft is detected by the in-vehicle theft detection device 1, a theft detection signal is transmitted from the in-vehicle transmitter 2 in conjunction with this. At this time, the in-vehicle transmitter 2 starts the timer circuit and starts counting for a predetermined time (step S3).

  The theft detection signal transmitted from the in-vehicle transmitter 2 immediately after the in-theft detection device 1 detects the theft is first received by the receiver 4a installed on the upper floor side of the vehicle owner's home ( Step S4). When the receiver 4a receives the theft detection signal, an illumination control signal instructing lighting of the upper floor side lighting device 3a is transmitted from the remote control transmitter 5a configured integrally with the receiver 4a ( Step S5). This lighting control signal is received by the remote control receiver 6a attached to the lighting device 3a on the upper floor side (step S6).

  When receiving the illumination control signal from the remote control transmitter 5a, the remote control receiver 6a controls the upper floor side illumination device 3a in accordance with the illumination control signal. As a result, the lighting device 3a on the upper floor side is turned on (step S7).

  Next, at the stage when a predetermined time has started counting in step S3 (step S8), the theft detection signal is transmitted again from the in-vehicle transmitter 2 (step S9). The theft detection signal transmitted here is received by the receiver 4b installed on the lower floor side of the vehicle owner's home (step S10). When the receiver 4b receives the theft detection signal, an illumination control signal instructing lighting of the lower floor side lighting device 3b is transmitted from the remote control transmitter 5b configured integrally with the receiver 4b ( Step S11). This lighting control signal is received by the remote control receiver 6b attached to the lower floor side lighting device 3b (step S12).

  When receiving the illumination control signal from the remote control transmitter 5b, the remote control receiver 6b controls the lower floor side illumination device 3b in accordance with the illumination control signal. As a result, the lower floor side lighting device 3b is turned on (step S13). The illuminating devices 3a and 3b that are turned on may be automatically turned off when a predetermined time elapses after the lighting. Thereby, for example, when the vehicle owner is not at home, it is possible to avoid the inconvenience that the lighting devices 3a and 3b remain on for a long time and power is wasted. Also, at this time, if a predetermined time for continuing lighting of the lighting devices 3a and 3b is set at random, the theft person notices that the lighting devices 3a and 3b are automatically turned on and off. Can be reduced, and a higher anti-theft effect can be expected.

  As described above, in the vehicle antitheft system of the present embodiment, when a theft is detected by the in-vehicle antitheft device 1 mounted on the vehicle, the lighting device at the home of the vehicle owner is linked to this. Since the lights 3a and 3b are lit, it is possible to give a psychological feeling of pressure to the theft by thinking that the vehicle owner has noticed the theft. Thereby, the theft can give up the theft of the vehicle, and the theft of the vehicle can be effectively prevented. Further, at this time, the vehicle owner can give a psychological pressure to the theft without actually confronting the theft, which is safe.

  Further, in the vehicle antitheft system of this embodiment, the upper floor side lighting device 3a and the lower floor side lighting device 3b are sequentially lit at a predetermined time difference, so that the vehicle owner approaches the theft. It can be thought that it is coming, giving a stronger psychological pressure to the theft, and exhibiting a higher anti-theft effect. Further, the voice reproduction device 20 provided in the in-vehicle theft detection device 1 is operated in cooperation with the control of the lighting devices 3a and 3b, for example, the upper floor side lighting device 3a is turned on and then the lower floor side If the vehicle owner reproduces the sound of the vehicle owner going down the stairs with the sound reproducing device 20 until the lighting device 3b is turned on, it gives a stronger psychological pressure to the theft, and the extremely high theft The prevention effect can be exhibited.

  Moreover, in the vehicle antitheft system of this embodiment, as the structure which gives psychological pressure to a theft by lighting the lighting devices 3a and 3b which are already installed to illuminate the interior of the vehicle owner's home. Therefore, for example, it is not necessary to separately install a dedicated warning light or the like, and a high antitheft effect can be exhibited with an inexpensive configuration.

(Second Embodiment)
Next, another example of a vehicle antitheft system to which the present invention is applied will be described. In the vehicle antitheft system of this embodiment, as shown in FIG. 6, receivers 4a and 4b for receiving a theft detection signal from the in-vehicle transmitter 2 are built in the remote control receivers 6a and 6b, respectively. When a theft detection signal from the in-vehicle transmitter 2 is received by the devices 4a and 4b, the remote control receivers 6a and 6b perform control to forcibly turn on the lighting devices 4a and 4b. Since the other configuration is the same as that of the vehicle antitheft system of the first embodiment described above, the same parts as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted. To do.

  In the present embodiment, since the receivers 4a and 4b are separated from the remote control transmitters 5a and 5b and are built in the remote control receivers 6a and 6b, respectively, the remote control transmitters 5a and 5b are compared. The shape can be freely set. For example, as shown in FIG. 7, remote control transmitters 5a and 5b (hereinafter collectively referred to as remote control transmitter 5 unless otherwise distinguished) are formed to be detachable from the remote control receiver 6, and the remote control receiver It is also possible to store the remote control transmitter 5 in combination with the remote control receiver 6 before the 6 is attached to the lighting device 3 or when not in use. In this case, if a logo mark or the like is engraved on the outer peripheral surface of the remote control transmitter 5, the aesthetic appearance can be improved.

  The remote control receiver 6 in the present embodiment basically receives the illumination control signal transmitted from the remote control transmitter 5 and controls the illumination device 3 in accordance with this, but the in-vehicle transmitter is provided by the built-in receiver 4. When the theft detection signal from 2 is received, control is performed to forcibly turn on the illumination device 3 regardless of the presence or absence of the illumination control signal. That is, the remote control receiver 6a attached to the lighting device 3a on the upper floor side operates in cooperation with the built-in receiver 4a, and is mounted on the vehicle in conjunction with the detection of the theft by the in-vehicle theft detection device 1. When the theft detection signal transmitted from the transmitter 2 is received by the receiver 4a, the lighting device 3a on the upper floor side is forcibly turned on. In addition, the remote control receiver 6b attached to the lower floor side lighting device 3b operates in cooperation with the built-in receiver 4b, and is mounted on the vehicle in conjunction with the detection of the theft by the in-vehicle theft detection device 1. When the theft detection signal transmitted from the transmitter 2 is received by the receiver 4b, a control for forcibly lighting the lower floor side lighting device 3b is performed.

  Thereby, also in this embodiment, in conjunction with the detection of the theft by the in-vehicle theft detection device 1, the lighting devices 3a and 3b installed at the home of the owner of the vehicle can be turned on. It is possible to make the thief think that the owner of the vehicle has noticed, to give a psychological pressure to the theft, and to effectively prevent the vehicle from being stolen.

  The above is a specific example of a vehicle antitheft system to which the present invention is applied, and the present invention is not limited to the above example, and various modifications are of course possible. For example, in the vehicle anti-theft system described above, assuming that the vehicle owner's home is a two-story building, when the in-vehicle anti-theft device 1 detects the theft, the lower floor lighting device 3a and the lower The floor side lighting device 3b is sequentially turned on. However, one lighting device may be turned on in conjunction with the detection of the theft by the in-vehicle theft detection device 1, or three or more lights. The apparatus may be turned on. Moreover, the lighting device that is turned on in conjunction with the detection of the theft by the in-vehicle theft detection device 1 is not limited to the lighting device for illuminating the interior of the room, but is also installed in the vicinity of the entrance or the parking lot. May be used.

  Moreover, in the vehicle antitheft system described above, a plurality of receivers corresponding to the respective lighting devices 3a and 3b are provided for each of the plurality of lighting devices 3a and 3b that are turned on in conjunction with the detection of the theft by the in-vehicle antitheft device 1. 4a and 4b are installed, but only one receiver is installed at the home of the vehicle owner, and when the receiver receives a theft detection signal, each of the plurality of lighting devices is turned on. Also good.

  The vehicle anti-theft system described above has a configuration using the remote control transmitters 5a and 5b and the remote control receivers 6a and 6b for controlling the lighting devices 3a and 3b by remote control. If 3b is configured to be operable in cooperation with receivers 4a and 4b, remote control transmitters 5a and 5b and remote control receivers 6a and 6b can be dispensed with. However, in order to provide such functions to the existing lighting devices 3a and 3b, complicated work such as wiring work is required, so the remote control transmitters 5a and 5b and the remote control receivers 6a and 6b are used. The vehicle anti-theft system to which the present invention is applied can be easily realized with the above configuration.

  In other words, since a technology for enabling remote control of an existing lighting device by separately providing a remote control transmitter and a remote control receiver has already been established, applying such technology, By incorporating a receiver for receiving a theft detection signal into a remote control receiver and providing them to the vehicle owner as a set, a vehicle antitheft system to which the present invention is applied can be easily realized. . In this case, the vehicle owner only has to temporarily remove the lighting device from the hook ceiling installed on the ceiling of the house and interpose a remote control receiver between them, and no complicated work is required. .

  In the above-described embodiment, assuming that the vehicle is parked in the parking lot of the owner's home, the receiver 4 that receives the theft detection signal is installed at the vehicle owner's home, and the theft is performed. The example in which the existing lighting device 3 is turned on at the vehicle owner's home when detected is described. For example, the receiver 4 is installed in a house where a vehicle may be parked for a long time, such as a relative's house or inn. When the receiver 4 receives the theft detection signal, if the existing lighting device 3 is turned on in this house, the same applies when the vehicle is parked in a place other than the home of the vehicle owner. The anti-theft effect can be demonstrated.

It is a schematic diagram which shows one structural example of the vehicle antitheft system to which this invention is applied. It is a block diagram of the vehicle-mounted antitheft detection apparatus used for the said vehicle antitheft system. It is a figure explaining the attachment method of the remote control receiver used for the said vehicle antitheft system, and is a perspective view which shows the relationship between a remote control receiver and an illuminating device. It is a figure explaining the attachment method of the said remote control receiver, and is a perspective view which shows the relationship between a remote control receiver and hook ceiling. It is a flowchart which shows the operation | movement outline | summary of the said vehicle antitheft system. It is a schematic diagram which shows the other structural example of the vehicle antitheft system to which this invention is applied. It is a perspective view which shows the modification of a remote control receiver and a remote control transmitter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle theft detection apparatus 2 In-vehicle transmitter 3a, 3b Illuminating device 4a, 4b Receiver 5a, 5b Remote control transmitter 6a, 6b Remote control receiver 20 Audio | voice reproduction apparatus

Claims (7)

An in-vehicle theft detection device for detecting a theft against the vehicle;
An in-vehicle transmitter that transmits a theft detection signal when a theft is detected by the in-vehicle theft detection device; and
A receiver installed in a house where the vehicle is parked and receiving a theft detection signal transmitted from the in-vehicle transmitter ;
Illuminating the interior of the house, and including a lighting device installed in the interior of the house so that the illuminated state can be recognized from outside the house ,
A vehicle theft prevention system, wherein the lighting device is turned on when the receiver receives a theft detection signal from the in-vehicle transmitter. A remote control transmitter for transmitting a lighting control signal for controlling the lighting device by remote operation;
The vehicle theft according to claim 1, further comprising: a remote control receiver that receives a lighting control signal transmitted from the remote control transmitter and controls the lighting device according to the received lighting control signal. Prevention system. The receiver is provided on the remote control transmitter side,
The remote control transmitter transmits an illumination control signal instructing lighting of the illumination device when the receiver receives a theft detection signal from the in-vehicle transmitter. Vehicle anti-theft system. The receiver is provided on the remote control receiver side,
3. The vehicle according to claim 2, wherein the remote control receiver forcibly turns on the lighting device when the receiver receives a theft detection signal from the in-vehicle transmitter. 4. Anti-theft system. A plurality of lighting devices are installed in the house where the vehicle is parked,
The in-vehicle transmitter has a built-in timer circuit,
When the theft detection is detected by the in-vehicle theft detection device, the in-vehicle transmitter transmits the theft detection signal a plurality of times at predetermined time intervals to sequentially turn on the plurality of lighting devices. Item 5. The vehicle antitheft system according to any one of Items 1 to 4.   6. The vehicle antitheft system according to any one of claims 1 to 5, wherein the in-vehicle antitheft device has an audio reproduction means and reproduces a prerecorded audio when a theft is detected. In-vehicle theft detection device and in-vehicle transmitter are mounted on the vehicle,
Install a receiver in the house where the vehicle is parked,
When a theft act on the vehicle is detected by the in-vehicle theft detection device, the in-vehicle transmitter transmits a theft detection signal,
When the theft detection signal is received by a receiver installed in the house where the vehicle is parked, the interior of the house is illuminated, and the illuminated state can be recognized from outside the house. A vehicle theft prevention method comprising lighting an illumination device installed indoors .

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