JP3553820B2 - Security unlocking system and security unlocking jig - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a security system, particularly a security lock release system, and a security lock used for a security lock release system, which can be used for all devices such as audio devices or the like that can use a memory such as a memory IC to restrict the function thereof. Related to release jig.
[0002]
[Prior art]
A security system is provided to prevent in-vehicle audio equipment from being stolen from a vehicle. Conventional security systems for in-vehicle audio equipment usually use a variety of numeric keys on the front panel of the equipment to manually enter a several-digit user PIN code. to start. When an audio device is stolen from a car, the device is first detached from the car and attached to another car again. That is, the device is once disconnected from the battery and connected to the battery again. This change in the battery connection state is detected based on a change in the power supply, and the security system is executed when this state is detected, so that the device is not started unless a correct password is input.
[0003]
However, in audio devices, not all devices have a large number of numeric keys, and in that case, the types of passwords are reduced, and security performance is reduced. In addition, it is conceivable to input a security code using a key other than a number. However, the operation becomes complicated, and the security code is not a number.
[0004]
As another mode, when the security system is operated and locked, the user brings the device to a dealer, and the dealer inputs a master code by operating a switch of the device to release the lock. However, in such a case, in order to prevent the user from directly performing the unlocking operation, a very complicated operation must be performed, and the person in charge of the dealer may have difficulty. On the other hand, there is also a risk that the master code leaks outside.
[0005]
Furthermore, as another form, in the case of audio equipment having a function of reproducing a signal recorded on a CD as a recording medium, a security system using TOC (TABLE OF CONTENT) information such as a compact disc (CD) has been proposed. I have. That is, when the device is in the security lock state, the CD used in the security mode setting or the same CD is inserted into the CD player of the audio device, the TOC information is read from the CD into which the security device is inserted, and this is stored in the memory. The inoperable state is released if the TOC information matches the TOC information recorded in the. However, also in this case, the disk or the device for reproducing the disk has a defect, so that the TOC information cannot be read and the security lock cannot be released.
[0006]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a system and a jig therefor that enable a dealer's person to release a security-locked device by a simple operation without disclosing a master code.
[0007]
[Means for Solving the Problems]
A security lock release system according to the present invention includes a device having storage means for storing a security lock signal, and a security lock which is formed separately from the device and has a built-in command for initializing the security signal stored in the storage means. A security lock release system that has a release jig, connects the security lock release jig to the device, and transmits the command from the jig to the detection storage unit of the device, thereby releasing a security lock.
The security lock release jig includes a security lock releaseable number setting unit, a number storage unit for storing the set number, and the releaseable number stored by subtracting the releaseable number each time the command is transmitted. Has a releasing operation stopping means for stopping the releasing operation after the value becomes 0,
The device and the security unlocking jig are configured separately from each other, and a number setting unit for setting an initial value of a releasable number of times for the security unlocking jig; and A connection unit for connecting the unit,
The security lock releaseable number setting means has a configuration which functions as a number setting means for setting an initial value of the number of times that can be released in the number storage means when the number setting unit is connected to the connection unit. ing.
[0008]
The security lock release jig of the present invention incorporates a command for initializing a security lock signal stored in a device, and outputs the command to the device to release the security lock of the device.
Means for setting the number of times the security lock can be released, means for storing the number of times set, and a release operation after the number of times the release is subtracted each time the command is output and the stored number of times released becomes zero A release operation stopping means for stopping
The security lock release jig is configured separately from the security lock release jig, and further includes a connection unit for connecting a count setting unit for setting an initial value of the number of releasable times to the security lock release jig. ,
The security lock releaseable number setting means has a configuration which functions as a number setting means for setting an initial value of the number of times that can be released in the number storage means when the number setting unit is connected to the connection unit. ing.
[0009]
Further, the security lock releaseable number setting means has a connection portion with the number setting unit, and has a built-in voltage combination pattern to be received from the number setting unit, and has a built-in voltage pattern output from the number setting unit. When the pattern coincides with the set pattern, the security lock release jig functions as the number setting means.
[0010]
When the voltage pattern output from the number-of-times setting unit does not match the built-in pattern, the security-lock-cancellable-times setting means does not function as the number-of-times setting means but functions as a security lock release jig.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a diagram showing the configuration of the security lock release system of the present invention. In the figure, reference numeral 1 denotes a security lock target, for example, an in-vehicle audio device, 2 a security lock release jig, and 3 a frequency setting unit. The audio device includes a microcomputer 11, a communication I / F IC 12, and a memory IC 13, and is connected to a vehicle accessory power supply Acc (for example, 13V) via a connector 14 and a battery Bu for storing the memory. . Another connector 15 is connected to the security lock release jig 2.
[0012]
The security lock release jig 2 includes a microcomputer 21, a memory IC 22, a communication I / F IC 23, a release operation switch (SW) 24, a display device 25, and a regulator 26, and is connected to the audio device 1 via a connector 27. Connected. Another connector 28 is connected to the count setting unit 3. The regulator 26 reduces the voltage (for example, 13 V) of the power supply line lp and the ground line le received from the audio device 1 via the connector 27 to, for example, 5 V and supplies the voltage to the microcomputer 21 and the like via the power supply line lp1 and the ground line le1. I do.
[0013]
The number-of-times setting unit 3 includes resistors R11 to R42, and is connected to the security lock release jig 2 via the connector 31.
Next, the operation of the security unlocking system of the present invention will be described. First, the operation of the security lock will be described with reference to an example of an in-vehicle audio device. When the audio device 1 is stolen from the car, the audio device 1 is once removed from the battery. Then, the microcomputer 11 detects the change in the connection state of the battery based on the change in the power supply, and stores the change in the memory IC 13 of the audio device 1 as a security lock signal. Then, when the audio device 1 is attached to another vehicle and connected to the battery again, the security lock system executes the security lock operation on condition that it is stored that the battery has been once removed. When the security lock operation is performed, the audio device 1 is in an inoperable state, and does not accept various switch operations. That is, when the power supply is turned off once and then the audio device 1 is turned on, the microcomputer 11 detects this, and if the information that the battery has been removed is stored in the memory IC 13, the microcomputer 11 executes the security lock.
[0014]
Further, the security lock function can be operated by detecting only that the power supply is connected to the audio device. In this case, when the audio device is connected to the power supply, the user writes information in the security system so as to operate as such. The operation of connecting the power supply means that the power supply was disconnected before that. Therefore, when the audio device is once disconnected from the battery and is connected to the battery again, this is detected and the security lock is activated, and the audio device becomes inoperable.
[0015]
Next, the operation of releasing the security lock will be described. It is assumed that the audio device 1 is security-locked. First, the connector 27 of the security unlocking jig 2 is connected to the connector 15 of the audio device 1. Then, the release operation switch (SW) 24 is pressed. Then, the microcomputer 21 instructs the communication I / F IC 23 to transmit a security lock release command. This command is stored in the program ROM of the microcomputer 21 of the security lock release jig 2 in advance. The communication I / F IC 23 receives this and transmits a security lock release command to the audio device 1 via the connector 27. In the audio device 1, the communication I / F IC 12 receives the security lock release command via the connector 15 and outputs this command to the microcomputer 11. The microcomputer 11 receives this, initializes the memory of the security lock signal stored in the memory IC 13, and releases the security lock.
[0016]
In the above operation, the number of times the security can be released is stored in the memory IC 22 of the security lock release jig 2 and is subtracted from the number of times the security lock can be released each time the security lock releasing operation is performed. After that, the release operation is not performed even if the release operation switch (SW) 24 is pressed. The microcomputer 21 stops the release operation upon receiving a signal indicating that the number of times that can be released is 0 from the memory IC 22.
[0017]
The display device 25 displays each stage of the release operation, and the following display is performed during the release operation. First, (1) when the connector 27 of the security lock release jig 2 is connected to the connector 15 of the audio device 1, it is displayed that the audio device 1 and the security lock release jig 2 are connected. Next, (2) when the release operation switch (SW) 24 is pressed, a message to that effect is displayed. (3) When the security lock release operation is completed, a message indicating that the security lock has been released is displayed.
[0018]
Next, the number setting unit 3 will be described. The frequency setting unit 3 is supplied with power from the security lock release jig 2. Each of the resistors R11, R12, R21, R22, R31, R32, R41, and R42 is a voltage dividing resistor, and a specific voltage value is generated by these voltage dividing resistors. For example, it is set so that 1 V, 2 V, 3 V, and 4 V are output from the output terminals a, b, c, and d in the figure, respectively. Although the number of output terminals is four in the case of the drawing, this number can be arbitrarily changed as necessary. The number-of-times setting unit 3 is used by connecting the connector 31 to the connector 28 of the security unlocking jig.
[0019]
On the other hand, the microcomputer 21 of the security lock release jig 2 has a built-in combination pattern of voltages to be received from the output terminals a, b, c, and d of the number setting unit 3.
Next, the operation of the number setting unit 3 will be described. The frequency setting unit 3 is connected to the security unlocking jig 2. In this case, the output voltage patterns from the output terminals a, b, c, and d of the circuit setting unit 3 and the output voltages a, b, c, and d incorporated in the microcomputer 21 of the security lock release jig 2 should be received. When the voltage combination patterns match, the security lock release jig 2 functions as a security lock release count setting unit. At this time, the jig 2 does not function as a security lock release unit. Therefore, if the SW 24 is pressed the set number of times at this time, the number of times the SW 24 can be pressed for releasing the security lock can be set. At that time, the set number of times is displayed on the display device 25, and when the security release operation is performed, how many times the release operation can be performed is also displayed.
[0020]
On the other hand, when the number-of-times setting unit 3 is connected to the security lock release jig 2, the output voltage patterns from the output terminals a, b, c, and d of the circuit setting unit 3 and the microcomputer 21 of the security lock release jig 2 If the combination patterns of the voltages to be received from the built-in output terminals a, b, c, and d do not match, the security lock release jig 2 does not function as the release number setting means, but functions as the security lock release means. I do.
[0021]
Although the combination of voltages incorporated in the microcomputer 21 is set to 1 V, 2 V, 3 V, and 4 V, it is actually a pattern that is more difficult to understand, for example, a pattern of 0.3 V, 4.6 V, 2.1 V, 1.7 V, or the like. Can be used.
FIG. 2 is a flowchart showing the security lock release operation of the present invention. First, it is determined whether the power of the audio device 1 of FIG. 1 is turned on (S1). If Yes, then it is determined whether the security lock release jig 2 is connected to the audio device 1 (S2). If Yes, it is determined whether the audio device 1 has received a security lock release command from the security lock release jig 2 (S3). If Yes, the security locked memory stored in the memory IC 13 of the audio device 1 is initialized, and the security lock is released. If the result is No in each step, the security lock release operation is not performed.
[0022]
The security unlocking system of the present invention has the following usage. For example, in the case of an in-vehicle audio device, a dealer holds a security unlocking jig, and when a user brings in a security-locked audio device, an unlocking service is performed using the security unlocking jig. On the other hand, the number-of-times setting unit is owned by the manufacturer or seller of the security unlocking jig, and sets the number of times of unlocking at the time of shipment to a dealer. In this case, the number of times is set in consideration of the shipping area and the number of devices handled, and the number is set so as to prevent unauthorized use.
[0023]
In the above description, the audio device has been described as an example. However, the present invention is not limited to the audio device, but can be applied to any device whose functions can be limited using a memory IC or the like.
[0024]
【The invention's effect】
According to the present invention, the security lock can be easily released by connecting the dedicated security lock release jig to the external connector of the device and pressing the switch when the security lock occurs. can do. Also, it is not necessary to use the master code for unlocking, and the command for unlocking the security is stored in the microcomputer of the security unlocking jig, so there is no need to disclose it and it can be leaked to the outside As a result, it is possible to prevent unauthorized unlocking. Furthermore, since the number of times of unlocking can be easily set, even if the security unlocking jig is stolen, the number of times of unlocking by the jig is specified and limited, so that the unauthorized use can be performed without restriction. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a security lock release system of the present invention.
FIG. 2 is a flowchart showing a security lock release operation of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... In-vehicle audio equipment 2 ... Security lock release jigs 11, 21 ... Microcomputers 12, 23 ... Communication I / F IC
13, 22 ... Memory IC
24 Release switch 25 Display device 26 Regulators 14, 15, 27, 28, 31 Connector 3 Number setting unit

Claims (5)

A device having storage means for storing a security lock signal, and a security lock release jig which is configured separately from the device and has a built-in command for initializing the security lock signal stored in the storage means,
A security lock release system that releases the security lock by connecting the security lock release jig to the device and transmitting the command from the jig to the detection storage unit of the device.
The security lock release jig includes a security lock releaseable number setting unit, a number storage unit for storing the set number, and the releaseable number stored by subtracting the releaseable number each time the command is transmitted. In the security lock release system having a release operation stopping means for stopping the release operation after the value becomes 0,
The device, and the security lock release jig are configured separately from each other, a number setting unit for setting an initial value of the number of releasable times in the security lock release jig, and provided in the security lock release jig, A connection unit for connecting the setting unit,
The security lock release possible number setting means, when the number setting unit is connected to the connection unit, functions as a number setting means for setting an initial value of the number of times that can be released in the number storage means. Do security unlock system. The security lock release possible number setting means has a built-in voltage combination pattern to be received from the number setting unit, and sets the number of times only when the voltage pattern output from the number setting unit matches the built-in pattern. 2. The security unlocking system according to claim 1, functioning as a means. A security lock release jig, which incorporates a command for initializing a security lock signal stored in a device and outputs the command to the device to release the security lock of the device,
Means for setting the number of times the security lock can be released, means for storing the number of times set, and a release operation after the number of times the release is subtracted each time the command is output and the stored number of times released becomes zero In a security lock release jig having a release operation stopping means for stopping
The security lock release jig is configured separately from the security lock release jig, and further includes a connection unit for connecting a count setting unit for setting an initial value of a releasable count to the security lock release jig. Prepare,
The security lock release possible number setting means, when the number setting unit is connected to the connection unit, functions as a number setting means for setting an initial value of the number of times that can be released in the number storage means. A security unlocking jig. The security lock release possible number setting means has a built-in voltage combination pattern to be received from the number setting unit, and sets the number of times only when the voltage pattern output from the number setting unit matches the built-in pattern. The security unlocking jig of the security unlocking system according to claim 3, which functions as a means. The security lock release jig of the security lock release system according to claim 3, wherein the security lock release jig has a switch, and the number of times the security lock can be released is set by operating the switch.

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