JP3372961B2 - Security system for car audio equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a car audio device.
Security system for a car audio device , and more particularly to a security system for a car audio device including a component having no operation panel.

[0002]

2. Description of the Related Art Car audio systems often incorporate a so-called security system in order to prevent theft. The security system is a system that does not start the operation by simply turning on the power switch, but starts the operation only by operating the preset buttons of the tuner in a predetermined order.

[0003]

However, recent car audio systems are often composed of a plurality of components such as a CD player, a cassette recorder, an amplifier, etc., but all the components are equipped with an operation panel. Not necessarily. Therefore, the security system that operates the buttons to release the security cannot be applied to components that do not have an operation panel.
Theft cannot be prevented.

The present invention has been made in view of the above problems and is a car including a component having no operation panel.
An object is to provide a security system for an audio system device .

[0005]

A security system for a car audio device according to a first aspect of the present invention comprises a head component having an input means and at least one slave component connected to the head component. a is, security is determined whether the head components are installed in the head component to release the security status of the head component on the basis of a specific code inputted from the input means when in the security state
When it is determined that the
A head component processing means for transmitting the specific code to the slave component to release the security status of the slave components together to permit operation of the Component, based on the particular code that has been transmitted from the head component processing means installed in the slave component To determine whether to release the security status of the slave component and release the security status
If it is determined that the slave component operation
And a slave component processing means for permitting . A security system for a car audio device according to a second aspect of the present invention includes a reference code storing and transmitting unit that is installed in the head component, stores the reference code for security release input from the input unit, and transmits the reference code to the slave component. Further comprising reference code storage means installed in the slave component for storing the reference code transmitted from the reference code storage transmission means, wherein the head component processing means outputs the specific code from the input means when the head component is in the security state. When input, it determines whether or not to release the security state of the head component based on the specific code and the reference code stored in the reference code storing and transmitting means, and the slave component processing means determines the specific code and the reference code. Based on the stored reference code in the storage means is to determine whether or not to cancel the security status of the slave component.

[0006]

According to the present invention, the security code input from the operation panel installed on the head component is transmitted via the bus line to the slave component having no operation panel, and the security of the slave component is released.

[0007]

1 is a block diagram of an embodiment of the present invention, in which a head component is a tuner 21, and slave components are a CD player 221 and an amplifier 222.
Is. That is, an audio signal output from the tuner 21 which is a sound source or the CD player 221 is transmitted to the amplifier 222 by the analog cables 241 and 242, power-amplified, and then output as sound from the speaker 25.

The tuner 21 includes a CPU 213, a memory 214, and an input interface 2 centering on a bus 212.
15 and the output interface 216. Input interface 21
An operation panel 211 having a ten-key pad, for example, is connected to 5 to input a tuning command and a security code.

A tuner 210 is connected to the output interface 216, and tuning is performed according to a tuning command input from the operation panel 211. Further, the bus 23 is connected to the output interface 216 and the operation panel 211 is connected.
The security code input from the CD player 221 or the amplifier 222 that is the slave component
Be transmitted to.

The CD player 221 is also the bus 2211.
Is controlled by a control unit including a CPU 2212, a memory 2213, an input interface 2214, and an output interface 2215. The input interface 2214 is connected to the bus line 23 and inputs a security code.

The CD player unit 2210 selects a CD or a track, for example, according to an operation command output from the output interface 2215. Amplifier 222
Similarly, a control unit is also mounted, and the switching of the tuner 21 and the CD player 221 which are sound sources and the reproduction volume are controlled. FIG. 2 is a flowchart of a reference security code setting routine executed by the control unit of the tuner 21 which is a head component, and is executed at the time of setting the security code.

In step 31, the reference security code input from the operation panel 211 is read. When the button indicating that the setting of the security code is completed is operated, the security code is stored in the memory 214 which is the E2 ROM in step 32.

Next, in step 33, the security code is transmitted from the output interface 216 to the bus line 23. FIG. 3 is a flowchart of a slave security code setting routine executed by the CD player 221 or the amplifier 222, which is a slave component, and is executed at the same time when the reference security code is set by the head component.

In step 41, the reference security code transmitted via the bus line 23 is received, and in step 42 it is stored in the memory 2213 which is an E2 ROM. The security code may be set in advance by the manufacturer. FIG. 4 is a flowchart of a head component operation routine for starting the operation of the tuner 21 that is a head component, which is executed before the start of use of the car audio device.

In step 51, the input security code input from the operation panel 211 is read. Step 5
In step 2, it is determined whether the reference security code and the input security code match. When a negative determination is made in step 52, this routine is immediately terminated without releasing the security of the head component.

If an affirmative decision is made in step 52, in order to cancel the security, the routine proceeds to step 53, where a tuner operation start command is outputted and the execution of this routine is ended. Next, in step 54, the input security code is output to the bus line 23. FIG. 5 is a flowchart of a slave component operation routine for starting the operation of the CD player 221 or the amplifier 222 which is the slave component, which is executed before the start of use of the car audio device.

In step 61, the input security code transmitted via the bus line 23 is received. In step 62, it is determined whether the reference security code and the input security code match. When a negative determination is made in step 62, this routine is immediately terminated without releasing the security of the slave component.

When the affirmative judgment is made in step 62, in order to cancel the security, the process proceeds to step 63 and the operation start command of the CD player 221 or the amplifier 222 is outputted to finish the execution of this routine.

[0019]

According to the present invention, a security code can be set for all components of a car audio device that is configured by combining a head component having an operation panel and a slave component having no operation panel. It is possible, and it is possible to reliably prevent theft.

[Brief description of drawings]

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

FIG. 2 is a flowchart of a reference security code setting routine.

FIG. 3 is a flowchart of a slave reference security code setting routine.

FIG. 4 is a flowchart of a head component operation routine.

FIG. 5 is a flowchart of a slave component operation routine.

[Explanation of symbols]

11 ... Head component 111 ... Operation panel 112 ... Input security code storing and transmitting means 113 ... Reference security code storage means 114 ... Head component operation command means 12i ... Slave component 12i1 ... Input security code receiving / storing means 12i2 ... Slave reference security code storage means 12i3 ... Slave component operation command means 13 ... Bus line

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Claims (2)

(57) [Claims] 1. A security system for a car audio device, comprising: a head component having an input means; and at least one slave component connected to the head component, wherein the security system is installed in the head component. When it is determined that the security state of the head component is to be released based on the specific code input from the input means when in the security state, and it is determined to release the security state
While allowing the operation of the head component ,
A head component processing means for transmitting the specific code in order to release the security status of the slave component in the slave component is installed in the slave component, based on the specific codes transmitted from the head component processing means Determine whether to release the security status of the slave component by
When it is determined that the
A security system for a car audio device, comprising slave component processing means for permitting the operation of a network component. 2. A is installed in the head component, a reference code storage transmission means for transmitting the reference code to the slave component stores the reference code for security release that is input from the input unit, the slave component Further comprising a reference code storage unit installed in the storage unit for storing the reference code transmitted from the reference code storage transmission unit, wherein the head component processing unit outputs from the input unit when the head component is in a security state. When a particular code is input, which determines whether or not to cancel the security status of the head component on the basis of the reference code stored in the reference code storage transmission means and the specific code, the slave component processing means, said The security system for a car audio device according to claim 1, wherein it is determined whether or not to release the security state of the slave component based on a specific code and a reference code stored in the reference code storage means.