JPH09161348A - Burglarproof device of reproducing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burglarproof device of reproducing equipments such as a CD player easily to execute the input operation of an ID code and hardly to forget the ID code for the purpose of the burglarproof. SOLUTION: The information of TOC(table of contents) of a specified CD is stored beforehand in an auxiliary storage device 8 as the ID code, and when a power supply of the CD player reproducing device is once disconnected from a battery and again connected, the power is not supplied to the CD player reproducing device unless the decision is made by a control circuit 5 that the TOC information read out from the specified CD loaded to a CD deck 1 and the TOC information stored in the auxiliary storage device 8 coincide. Thus, the burglarproof device is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for a reproducing device used in a sound reproducing device such as a compact disc (CD) player, a mini disc (MD) player and a digital compact cassette (DCC) player.

[0002]

2. Description of the Related Art An anti-theft device used for an on-vehicle audio device has been known. Such an anti-theft device, for example, shown in USP 4,604,708, detects whether or not the power supply terminal of the audio device is removed from the battery by monitoring the power supply voltage, and once the power supply terminal of the audio device is turned on. After it is detected that the audio device has been disconnected from the battery, a code input is requested when the power supply terminal of the audio device is connected to the battery again, and I stored in the audio device is requested.
Unless the ID code that is the same as the D code is entered from the key, the operation of the audio equipment is stopped.
The audio device cannot be used unless the D-code is known, so that it is theft prevention.

[0003]

As described above, according to the conventional method, the main power is turned on when the same ID code as the ID code stored in the audio equipment is input from the key, and the regular ID is input. The audio device could not be used unless the code was entered.

According to this method, the user must store an ID code consisting of a plurality of alphanumeric characters. If the user forgets the ID code, the audio equipment cannot be used and it takes time and effort for input. There was a problem.

The present invention solves the above-mentioned conventional problems. For the purpose of theft prevention, the operation of inputting an ID code is easy and the ID code is not forgotten, and the playback device such as a CD player is stolen. The purpose is to provide a prevention device.

[0006]

In order to achieve the above object, the present invention comprises a data reading means for reading data stored in a recording medium, and a reproducing / amplifying means for reproducing / amplifying the data read by the data reading means. In the reproducing apparatus provided, the data stored in the predetermined storage medium is read and I
ID code storage means for storing as a D code, ID code comparison means for comparing the data stored in the recording medium read by the data reading means with the ID code stored in the ID code storage means, and power supply control means. And the data reading means, the ID code storage means, the I
A first power supply means for supplying a first power supply to the D code comparison means and the control means, and a second power supply means for supplying a second power supply to other parts of the reproducing apparatus including the reproduction / amplification means. The power supply control means has the second power supply when the ID code comparison means determines that the data stored in the recording medium and the ID code match after the first power supply means is turned on. It is characterized in that the means is turned on.

Thus, for the purpose of preventing theft, the operation of inputting the ID code is easy, the ID code is not forgotten, and the reproducing apparatus does not operate unless the predetermined ID code is input, so that the reproducing apparatus does not operate. The anti-theft device can be obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention comprises a data reading means for reading the data stored in the recording medium, and a reproducing / amplifying means for reproducing and amplifying the data read by the data reading means. In the playback device,
ID code storage means for storing the data stored in a predetermined storage medium as a read ID code, the data stored in the recording medium read by the data reading means, and the I
A first power source for the ID code comparison means for comparing the ID codes stored in the D code storage means, the power supply control means, the data reading means, the ID code storage means, the ID code comparison means and the control means. And a second power supply means for supplying a second power supply to the other part of the reproducing apparatus including the reproduction / amplification means, wherein the power supply control means has the first power supply means. After the means is turned on, the second power supply means is turned on when the ID code comparison means determines that the data stored in the recording medium matches the ID code.

As a result, unless the predetermined ID code is input, the power for the reproducing / amplifying means is not turned on and the reproducing apparatus does not work, which is useful for theft prevention.

The invention according to claim 2 is characterized in that the TOC information stored in a predetermined storage medium is used as an ID code.

As a result, it is not necessary to store the ID code, and it suffices to determine only the storage medium to be inserted first, so that the ID code is not forgotten, and the labor of inputting is reduced.

Further, the invention according to claim 3 is the first
Power supply means and second power supply means for detecting the voltage of the second power supply means are provided, and in the power supply control means, the power supply voltage detection means temporarily lowers the first power supply voltage and the second power supply voltage. After that, when it is detected that the power is turned on again, only the first power supply means is turned on until the comparison determination result of the ID code comparison means is output.

As a result, the input of the ID code is designated only when there is a risk of theft, which leads to a reduction in the number of operations.

The anti-theft device for a reproducing apparatus according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

(Embodiment 1) FIG. 1 is a block diagram of an embodiment of a theft prevention device for a reproducing apparatus according to the present invention. The present embodiment is an example of an anti-theft device used in a CD player device.

In FIG. 1, reference numeral 1 is a sound reproducing device C.
This is a D deck, and the disc insertion slot 2 of this CD deck 1
The CD is played by inserting the CD into. CD
The audio signal output from the CD deck 1 by playing
It is amplified by the amplifier 3 and applied to the speaker 4. 5 is C
The control circuit is composed of a microcomputer for controlling the operation of the D deck 1. Reference numeral 6 denotes a key group for issuing various operation commands to the CD deck 1, and this key group also includes a key for turning on / off the power of the CD player device. Reference numeral 7 is a display device for displaying a reproduction state and the like, and 8 is an auxiliary storage device for storing an ID code. The auxiliary storage device 8 is an EEPROM or the like which can be held even if the power supply is stopped. ing. Reference numeral 9 denotes a power supply circuit. The power supply circuit 9 includes a circuit for detecting ON / OFF of an accessory switch (ACC), a power switch for controlling power supply to the CD deck 1, a voltage monitoring circuit for monitoring power supply voltage, and the like. Composed.

Next, the operation of this embodiment will be described. First, the operation of storing the ID code will be described.

When the ID code setting key in the key group 6 is operated, the ID code setting mode is set. Here, when a predetermined CD is inserted into the disc insertion slot 2 of the CD deck 1, the TOC information of this CD is read and this TOC information is stored in the auxiliary storage device 8 as an ID code.

The power supply voltage monitoring circuit in the power supply circuit 9 monitors the voltage of the power supply line connected to the battery. When the power supply voltage monitoring circuit detects that the power supply voltage has dropped, the control circuit 5 sends the power supply voltage drop data to the auxiliary storage device 8 for storage. Such a decrease in the power supply voltage also applies, for example, when the power supply line of the CD player installed in the vehicle compartment is removed from the battery and stolen.

After that, when the power supply voltage monitoring circuit detects that a power supply voltage of a predetermined level or higher is applied, a signal is sent from the control circuit 5 to the display device 7 and an ID code for inputting the ID code to the display device 7 is sent. The input request is displayed.

Here, the disc insertion slot 2 of the CD deck 1
When a predetermined CD is inserted into the CD, the CD deck 1 reads TOC (Table Of Contents) information recorded in the inserted CD and sends it to the control circuit 5.

The control circuit 5 uses the TOC information previously stored as the ID code in the auxiliary storage device 8 and the TOC read this time.
The C information is compared to determine whether they match. if,
If the determination results match, a signal indicating the match is sent from the control circuit 5 to the power supply circuit 9, the power switch is turned on, and the CD is turned on.
The power supply voltage can be supplied to the player device.

On the other hand, when it is determined that the TOC information stored as the ID code in the auxiliary storage device 8 and the TOC information read this time do not match, the power switch of the power supply circuit 9 continues to be in the off state and the CD player. The power supply voltage is not supplied to the device and the CD player device cannot be used.

As described above, unless a predetermined CD is inserted into the CD deck 1 and the TOS information is input, the C
Since the D player cannot be used, it will prevent theft.

As described above, in the above-described embodiment, since the ID code is the TOC information of the predetermined CD, it is not necessary to store the ID code composed of, for example, a plurality of digits, and the title of the predetermined CD or the like. It only needs to remember the singer's name, etc., which makes it easier to use.

The above is an example of the CD player device, but if it is an electronic device having a recording medium reproducing device capable of discriminating the recorded data of a medium previously recorded like a CD,
The present invention can be used.

The TOC information used as the ID code is T
All of the OC information may be used, a part of the performance time or the like may be used, or the unique data of the CDROM may be used.

[0028]

As described above, according to the present invention, in the reproducing apparatus provided with the data reading means for reading the data stored in the recording medium and the reproducing / amplifying means for reproducing and amplifying the data read by the data reading means, ID code storage means for storing the data stored in the storage medium as a read ID code, and an ID code for comparing the data stored in the recording medium read by the data reading means with the ID code stored in the ID code storage means. A comparison device, a power supply control device, a data reading device, an ID code storage device, an ID code comparison device, a first power supply device for supplying a first power supply to the control device, and a reproduction device including a reproduction amplification device. Second power source means for supplying a second power source to the portion of the power source control means, and the power source control means controls the ID Comparison means has to turn on the second power supply means if it is determined a match of the stored data and the ID code to the recording medium.

Here, TOC information or the like can be used as the data stored in a predetermined storage medium.

As a result, it is not necessary to store the ID code, and it suffices to determine only the storage medium to be inserted first. Therefore, the forgetting of the ID code is eliminated, and the anti-theft device is easy to operate and easy to operate. realizable.

Further, since the ID code comparison is performed when it is detected that the power supply is turned on again after the power supply voltage has once dropped, it is sufficient to turn on the ID code only when there is a risk of theft. It leads to a decrease in the number of times.

[Brief description of the drawings]

FIG. 1 is a block diagram of a theft prevention device for a playback device according to an embodiment of the present invention.

[Explanation of symbols]

 1 CD deck 2 Disc insertion slot 3 Amplifier 4 Speaker 5 Control circuit 6 Key group 7 Display device 8 Auxiliary storage device 9 Power circuit

Claims (3)

[Claims] 1. A data reproducing device comprising a data reading device for reading data stored in a recording medium and a reproduction amplifying device for reproducing and amplifying the data read by the data reading device. An ID code storage means for storing as a read ID code, an ID code comparison means for comparing the data read by the data reading means on the recording medium with the ID code stored in the ID code storage means, and a power supply. Control means,
A second power source means for supplying a first power source to the data reading means, the ID code storage means, the ID code comparing means and the control means, and a second portion for the other part of the reproducing apparatus including the reproducing / amplifying means. Second power supply means for supplying power to the power supply control means, the power supply control means, after the first power supply means is turned on, the ID code comparison means stores the data and the ID code stored in the recording medium. An apparatus for preventing theft of a reproducing device, wherein the second power supply means is turned on when it is determined that the two match. 2. The anti-theft device for a reproducing device according to claim 1, wherein the TOC information stored in a predetermined storage medium is used as an ID code. 3. A power supply voltage detecting means for detecting the voltages of the first power supply means and the second power supply means is provided, and the power supply control means is configured such that the power supply voltage detecting means has the first power supply voltage and the first power supply voltage. After the second power supply voltage has dropped once,
When it is detected that the power is turned on again, the I
The anti-theft device for a reproducing apparatus according to claim 1 or 2, wherein only the first power supply means is turned on until the comparison judgment result of the D code comparison means is output.