JPH06115408A - Sound reproducing equipment on vehicle - Google Patents

Abstract

PURPOSE:To prevent theft of a vehicle surely with an inexpensive structure. CONSTITUTION:A code number is stored beforehand in a radio ever reci 1, that is a sound reproducing equipment on vehicle, and when the same number as the stored code number is not input by preset buttons a-f, even if an ignition key switch 5 is turned in a contact ST, current supply from a battery 6 to a starter motor 7 is cut off by a starter cut relay 8. Therefore if a vehicle is stolen together with the key, a starter motor 7 can not be started so as to prevent the theft surely. Moreover a cheap structure can be realized by only providing a line L4 for detecting a state of the contact ST of the ignition key switch 5 and a line L3 for connecting to a switch 11 which controls continuity/cutoff of the starter cut relay 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel on-vehicle sound reproducing device having a vehicle antitheft function.

[0002]

2. Description of the Related Art In a conventional antitheft device, when it is detected that a vehicle has been stolen, the theft is notified to the outside of the vehicle, for example, by blinking a brake lamp or a side light and blowing a horn. It is configured so that the vehicle cannot run by cutting off the power supply to the ignition circuit of the engine.

As a method for detecting the theft, a method for providing a switch for detecting that a door, an engine hood, a trunk or the like has been opened, a method for detecting a change in battery voltage or current due to a starter start, or a glass is used. There is a method of detecting the sound of only a specific frequency component generated when the sound is generated.

[0004]

In the above-mentioned prior art, there is a problem that the structure for detecting the theft is complicated, the cost is high, and the theft prevention function does not work when the key is stolen. .

An object of the present invention is to provide a novel on-vehicle sound reproducing device which can prevent the vehicle from being stolen with a simple structure.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to an input operation means for input operation for reproducing a desired sound, and an acousticizing means for performing acoustic conversion in response to an input operation to the input operation means. In a vehicle-mounted sound reproduction device including: a determination unit that determines whether or not the input operation unit has been operated in a predetermined procedure; a battery; and an electric system for operating the internal combustion engine. A vehicle-mounted sound reproducing device comprising: a disconnecting unit that responds to the output of the determining unit and disconnects the power supply to the electric system when the input operating unit is not operated in the predetermined procedure. is there.

[0007]

According to the present invention, an on-vehicle sound reproducing device such as a radio receiver or a magnetic tape reproducing device listens to the sounding means in response to an input operation from an input operation means such as a preset button or a music selection button. The sound desired by the person is converted into sound.

By using the input operating means provided for such sound reproduction, the determining means determines whether or not the preset buttons have been operated in the order predetermined by the input operating means, for example, in the order of pre-registered personal identification numbers. To judge. The result of the determination is given to the cutoff means, and the cutoff means is a battery and an electric system for operating the internal combustion engine,
For example, it is interposed between the starter motor, the ignition circuit, and the power supply line of the fuel injection control device. The cutoff means cuts off the power supply from the battery to the electric system when the input operation means is not operated in the predetermined procedure.

Therefore, since the internal combustion engine can be operated only after the input operation according to the predetermined procedure is performed on the input operation means, the vehicle can be prevented from being stolen.

[0010]

1 is a block diagram showing the electrical construction of an embodiment of the present invention. A radio receiver 1, which is an on-vehicle sound reproducing device, is configured to include an antenna and a receiving circuit for radio broadcasting, a power amplification circuit for a received acoustic signal, and a sounding means such as a speaker.
Is provided with preset buttons a to f which are input operation means for selecting a broadcasting station desired by a listener, and a display device 3 for displaying a reception frequency and a volume and sound quality adjustment knob. 4 are provided. When the ignition key switch 5 is conducted to the contact point Acc, electric power from the battery 6 can be supplied to a vehicle accessory device (not shown) such as a wiper device or a headlamp.
The radio signal is supplied to the radio receiver 1 through the line L1 so that the radio broadcast can be received and converted into sound.

The reception frequency is stored in the memory in the radio receiver 1 corresponding to each of the preset buttons a to f individually, and the stored contents are supplied from the battery 6 via the line L2. By the backup power, the ignition key switch 5 is held even in the state where the contact is turned off.

The ignition key switch 5 has a contact I.
When it is conducted to G, electric power is supplied to an electric system such as an ignition circuit of the internal combustion engine and a fuel injection control device (not shown), so that the internal combustion engine can be maintained in an operating state. This contact IG
Also, power is supplied to the radio receiver 1 via the line L1.

On the other hand, the starter motor 7 of the internal combustion engine
Is connected to the battery 6 via the relay switch 9 of the starter cut relay 8. One terminal of the relay coil 10 of the starter cut relay 8 is connected to the battery 6, and the other terminal is grounded via the switch 11. Therefore, when the switch 11 is turned on, the relay coil 10 is excited, the relay switch 9 is turned on, and the starter motor 7 is activated.

The switch 11 is turned on / off by the radio receiver 1 through the line L3. Therefore, the switching state of the contact ST of the ignition key switch 5 for driving the starter motor 7 is read into the radio receiver 1 via the line L4. The radio receiver 1 determines whether or not the vehicle has been stolen as follows, and when the vehicle is not stolen, the ignition key switch 5 is turned on to the contact ST to turn on the switch 11 to start the starter. The motor 7 is started and the internal combustion engine can be started. On the other hand, when the vehicle is stolen, even if the ignition key switch 5 is brought into contact with the contact ST, the switch 11 is kept off and the start of the internal combustion engine is prohibited.

That is, if the personal identification number is registered in advance from the preset buttons a to f and the anti-theft function is set, the switch 11 remains closed when the preset buttons a to f are not operated again in the order of the numbers. Hold and
When the ignition key switch 5 is turned on to the contact ST after the anti-theft function is reset by operating the personal identification numbers in order, the switch 11 is turned on.

Such a theft prevention function is set by setting a personal identification number and, for example, the ignition key switch 5 is brought into a contact OFF state while any one of the preset buttons a to f is pressed. It

FIG. 2 is a flow chart for explaining the antitheft operation as described above. In step n1,
Whether or not the anti-theft function is set is determined by the setting operation as described above, and if not, the process proceeds to step n2, and the ignition key switch 5 causes the contact S
When it is conducted to T, the switch 11 is conducted and the starter motor 7 is started to be in the normal operation state.

On the other hand, when the anti-theft function is set in step n1, the process proceeds to step n3, and the switch 11 is turned off and the starter cut state is set.
In step n4, it is determined whether or not the personal identification number is input from the preset buttons a to f. If not, the process returns to step n3, and if so, the process proceeds to step n5. In step n5, it is judged whether or not the input personal identification number and the pre-registered personal identification number match. If not, the process returns to step n3, and if so, the process proceeds to step n6 and the starter cut state is set. Is released and the ignition key switch 5 is in contact ST.
When the switch is turned on, the switch 11 is turned on to start the starter motor 7.

As described above, in the radio receiver 1 according to the present invention, even if the vehicle is stolen together with the key, when the same personal identification number as the registered personal identification number is not input,
Since the starter motor 7 cannot be activated, the vehicle cannot be moved and thus theft can be reliably prevented.

Further, according to the present invention, the line L4 for detecting the switching state of the contact ST of the ignition key switch 5 is used.
It is only necessary to provide the line L3 for controlling the switch 11 and it can be realized at a low cost with a simple configuration.

As another embodiment of the present invention, instead of the radio receiver 1, another in-vehicle sound reproducing device having a plurality of operation buttons such as a magnetic tape reproducing device and a compact disc reproducing device is used. Good. Further, as still another embodiment of the present invention, a condition may be added in which the number of times of incorrect input operation of the personal identification number is counted and the input is not accepted when the count value becomes equal to or more than a predetermined value.

[0022]

As described above, according to the present invention, by using the input operation means such as the preset button and the music selection button provided in the on-vehicle sound reproducing device, the operation is performed according to the procedure predetermined by the input operation means. If the vehicle is stolen, the electric system of the internal combustion engine is prohibited from being energized. Therefore, even if the vehicle is stolen together with the key, the internal combustion engine cannot be operated and the theft can be reliably prevented. Further, it is not necessary to provide a dedicated sensor or the like for detecting the theft, and it can be realized at low cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an anti-theft operation according to the present invention.

[Explanation of symbols]

 1 Radio receiver 5 Ignition key switch 6 Battery 7 Starter motor 8 Starter cut relay 11 Switch af Preset button

Claims (1)

[Claims] 1. An on-vehicle sound reproducing device comprising: an input operation means for input operation for reproducing a desired sound; and an acousticizing means for performing acoustic operation in response to an input operation to the input operation means. In the above, in response to the output of the determination means, it is interposed between the determination means for determining whether or not the input operation means is operated in a predetermined procedure, the battery, and the electric system for operating the internal combustion engine. However, the vehicle-mounted sound reproduction device is provided with a cutoff unit that cuts off the power supply to the electric system when the input operation unit is not operated in the predetermined procedure.