JPH07237526A - Antitheft device for automobile - Google Patents

Abstract

PURPOSE:To simply and surely check the invasion of a thief and preventing the theft in an automobile by expanding an expansive body instantly in the interior space on the basis of a detection signal sent from a door sensor and a window sensor, when a car thief destroys a door lock and a window glass to invade the automobile. CONSTITUTION:The turning on and off of an ignition switch in an automobile are detected by an ignition sensor 1. Whether persons are in the interior space or not is detected by a person sensor 2, and the opened or closed state of a door is detected by a door sensor 3, and the destruction of a window glass is detected by a window sensor 4. On the other hand, a bag-shaped expansive body 8 is provided in the interior space, and a driving device 7 and a gas supply device 8 for expanding the expansive body 8 are provided there. The driving device 7 is controlled on each detection signal issued from each of sensors 1 to 4 according to the turning on and off of a primary switch 5 by a controller 6. Namely, when a car thief destroys a door lock and the window glass and invades the automobile the expansive body 8 is expanded in the interior space to check the invasion of the thief.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The anti-theft device for an automobile according to the present invention is incorporated in an automobile and used to prevent the theft of the automobile and metal parts and equipment inside the automobile.

[0002]

2. Description of the Related Art Conventionally, in order to prevent a parked car from being stolen, or money, audio equipment, car telephones and other equipment in the car being stolen,
The ignition switch, steering wheel lock (lock steering mechanism), and door lock are used to prevent theft. Among them, the ignition switch is a switch that is operated by an ignition key when the driver parks the vehicle. When the switch is turned off, the circuit between the battery and the starter motor of the engine is cut off and the engine cannot be started. Further, normally, the steering wheel lock is simultaneously performed by operating the ignition key.

More recently, when a door lock, an automobile windshield, a rear glass or a side glass (in this specification, these are collectively referred to as "window glass") is broken, an alarm such as a siren sounds and is stolen. Prevention devices are being considered.

However, in such an anti-theft device, the engine is started by using a key that is a duplicate of the above ignition key, or by connecting the wiring between the battery inside the vehicle and the starter motor directly without the ignition key. You can steal a car.

Further, in the structure in which the siren sounds to alert the surroundings when a car thief breaks the door lock or the window glass to steal the metal or equipment in the car, the car itself is not stolen. Since there is time (time) for stealing the hardware and equipment of, the sufficient effect cannot be obtained. Further, in Europe and the United States, there is known an anti-theft device that locks the backrest of the front seat in a state in which the backrest is tilted forward, but this is troublesome because the backrest must be tilted forward every time the vehicle gets out of the vehicle. In view of such circumstances, the vehicle antitheft device of the present invention prevents theft of a vehicle and theft of metal parts and equipment inside the vehicle without requiring a particularly troublesome operation.

[0006]

The anti-theft device for a vehicle according to the present invention is a vehicle anti-theft device.
Ignition sensor that detects the FF state, door sensor that detects the open / closed state of the door, window sensor that detects that the window glass has been destroyed, and whether there is a person in the space between the dashboard and the front seats. A human sensor for detecting whether the space is inflatable, an inflatable body that is inflatable in the space portion and prevents a person from entering the space portion when inflated, a drive device that inflates the inflatable body based on a drive signal, A controller that issues the drive signal based on the signal from each sensor and an original switch for turning on and off the function of the controller are provided. Then, the controller is conditioned that the door sensor detects opening of the door or the window sensor detects breakage of glass when the ignition switch is OFF and the original switch is ON. To
It has a function of issuing the drive signal.

[0007]

The vehicle anti-theft device of the present invention constructed as described above is expanded by the detection signals of the door sensor and the window sensor when an automobile thief breaks the door lock or the window glass and tries to enter the vehicle. Inflate your body instantly to prevent intrusion and prevent theft.

[0008]

1 and 2 show an embodiment of the present invention. In FIG. 1 showing the structure of the vehicle antitheft device of the present invention, an ignition sensor 1 detects the ON / OFF state of an ignition switch by an ignition key used by a driver of the vehicle when the vehicle is in operation or stopped. Further, the door sensor 3 detects opening / closing of an entrance / exit door, a bonnet, and a trunk (these are collectively referred to as “door” in this specification). Further, the human sensor 2 detects whether or not a person is present in a space inside the vehicle, such as a front seat or a rear seat of the automobile. The human sensor 2 is composed of, for example, an infrared sensor or an ultrasonic sensor. For example, when an infrared sensor is used as the human sensor 2, a structure having a structure for detecting infrared rays emitted from a human body can be used. On the other hand, when an ultrasonic sensor is used, a structure in which the receiver receives the ultrasonic waves emitted from the transmitter and reflected by the human body can be used. Further, a bag-shaped inflatable body that expands as the pressure gas is fed is installed in the space.

The window sensor 4 is a sensor which sends out a detection signal when the window glass of an automobile is broken. For example, this sensor is an impact sensor which detects an impact when the window glass is broken,
Alternatively, it is composed of an ultrasonic sensor, a vibration sensor, or the like that detects damage to the window glass. These human sensor 2, door sensor 3,
The detection signal from the window sensor 4 is input to the controller 6.
The controller 6 has a function of sending a drive signal to the drive device 7 for starting the gas supply device 9 (inflator) based on the detection signals from the sensors 2, 3, and 4. The gas supply device 9 ejects gas based on the drive signal to instantly expand the expander 8.

The human sensor 2 and the window sensor 4 do not necessarily have to be provided independently, and both sensors 2 and 4 can be used by a single sensor. In this case, for example, an ultrasonic sensor including an oscillator and a receiver can be used as a sensor that serves as both the sensors 2 and 4.
Then, ultrasonic waves are transmitted from the oscillator to the window glass,
The ultrasonic waves reflected by this window glass are received by the receiver. When the window glass is broken, this ultrasonic wave does not reflect, so it is possible to detect that the window is broken.

When a person enters the vehicle, the ultrasonic waves sent from the oscillator are reflected by the surface of the human body and return to the receiver. The human body, especially the person who intrudes into the car in an attempt to steal, moves without distinction from the window glass, so the ultrasonic waves reflected by the human body and returning to the receiver are disturbed (fluctuation). Therefore, the presence or absence of fluctuation of the ultrasonic wave returning to the receiver is obtained, and if the fluctuation exists, it is determined that a person is in the vehicle. Then, when there is no fluctuation for a predetermined time (several seconds to several tens of seconds), a detection state for determining whether or not the window glass has been broken is set. Hereinafter, in order to release the anti-theft device, person detection and window glass detection are alternately repeated for a short time.

As described above, the human sensor 2 is provided in a single sensor.
In order to have the function as and the function as the window sensor 4, an infrared sensor having a transmitter that emits infrared light and a receiver that receives the reflected infrared light can be used.
However, infrared rays have higher directivity than ultrasonic waves,
Not only is the detection range narrow, but it is also not practical because it is easily affected by temperature changes. That is, the traveling speed of infrared rays changes with a change in temperature, and particularly when the temperature exceeds 65 ° C., the traveling speed becomes unstable. Therefore, 70 ~ in summer
When the reflection time is measured by installing it in a vehicle that reaches as high as 80 ° C., it is apt to malfunction and is not suitable as a sensor that also serves as both the sensors 2 and 4.

The source switch 5 is a switch for turning on and off the function (start / stop) of the controller 6. The original switch 5 can be turned on and off by a driver or the like from outside the vehicle, for example, by remote control of a remote control unit.

The vehicle antitheft apparatus of the present invention constructed as described above operates as shown in the flow chart of FIG. 2 to prevent theft of the parked vehicle and the metal parts and equipment inside the vehicle.

First, when parking, the driver
Turn off the ignition switch with the ignition key
And handle lock (lock steering mechanism)
And then go out of the car.

After the driver gets out of the vehicle, the driver locks the door and turns on the original switch 5 by remote control using a remote controller. Since the original switch 5 can turn on and off the function of the controller 6 as described above, the vehicle antitheft device of the present invention is set in this state.

Further, as shown in the flow chart of FIG. 2, when an automobile thief breaks the door lock and tries to enter the inside of the vehicle, the door sensor 3 detects the opening of the door, and the controller based on the detection signal of the door sensor 3. 6 sends a drive signal to the drive device 7. Then, the drive device 7 activates the gas supply device 9, and the high-pressure gas ejected by the gas supply device 9 instantly inflates the expander 8 to fill the space portion inside the vehicle.

Similarly, when the window glass is broken, the window sensor 4 also detects that the window glass is broken, and based on the detection signal of the window sensor 4, the inflatable body 8 instantly moves inside the vehicle. Inflate to fill the space. The expansive body 8 is not easily broken, and a bag-shaped one made of a flame-retardant material is used. The inside of the expander 8 is filled with high-pressure gas when the expander 8 is expanded, and the high-pressure gas is never discharged. Therefore, when the inflatable body 8 inflates to the full space portion by the detection signal of the door sensor 3 or the window sensor 4, there is no space to enter at least in the front portion of the front seat in the vehicle. Therefore, it is possible to prevent the intrusion of a car thief and prevent the theft of metal items and equipment in the vehicle.

In the flow chart of FIG. 2, the door opening detection precedes the condition for detecting that the window glass has been broken, but it is clear that the determination of any condition may precede. . Finally, the inflatable body 8 inflates when the human sensor 2 described above determines that there is no person in the vehicle. That is, the human sensor 2 functions as a safety device that prevents the inflatable body 8 from expanding when the driver or passenger is in the vehicle.

When the driver of the car enters the car, the remote control unit turns off the original switch 5 before opening the door.
Then, after the car's anti-theft device has been unset, board the car. If the main purpose is to prevent the vehicle itself from being stolen, the inflatable body 8 may be inflated at least in the space between the front seat and the dashboard in the vehicle. In this case, the human sensor 2 may detect whether or not there is a person or an animal (for example, a dog) in at least the space portion.

[0021]

The vehicle antitheft device of the present invention is constructed as described above, but even if a vehicle thief breaks a door lock or a window glass and tries to enter the vehicle, the vehicle interior is instantly filled. Since the inflatable body swells and blocks this invasion, it is possible to reliably prevent theft without requiring a particularly troublesome operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automobile antitheft device of the present invention.

FIG. 2 is a flowchart showing the operation of the vehicle antitheft device of the present invention.

[Explanation of symbols]

 1 Ignition sensor 2 Person sensor 3 Door sensor 4 Window sensor 5 Source switch 6 Controller 7 Drive device 8 Expander 9 Gas supply device

Claims (1)

[Claims] 1. An O switch for an automobile ignition switch.
There is an ignition sensor that detects the N and OFF states, a door sensor that detects the open / closed state of the door, a window sensor that detects that the window glass has been destroyed, and a person is present in the space between the dashboard and the front seats. A human sensor for detecting whether or not it is inflated, an inflatable body that is inflatable in the space portion and prevents a person from entering the space portion when inflated, and a drive device that inflates the inflatable body based on a drive signal. , A controller for emitting the drive signal based on the signal from each sensor, and an original switch for turning on and off the function of the controller, the controller, the ignition switch is OFF, A function of issuing the drive signal on condition that the door sensor detects opening of the door or the window sensor detects breakage of glass when the original switch is ON. Automobile anti-theft device having.