JP2005188168A - Crime preventive electric lock system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent locking and unlocking by an illegal act from an external part. <P>SOLUTION: This crime preventive electric lock system controls the locking and unlocking of an electric lock 1A by controlling the existence of power source supply to a driving part 1a of the electric lock 1A via an electric wire 4a from a power source 2a of a controller 2A by connecting the electric lock 1A and the controller 2A by the electric wires 4 (4a to 4d). A disconnection detecting electric wire 3 is arranged so as to cover the electric wires 4 between the electric lock 1A and the controller 2A. This disconnection detecting electric wire 3 is composed of a wire rod including a conductor, and a predetermined voltage is applied to the conductor from the power source 2a. A change in the voltage applied to the conductor of the disconnection detecting electric wire 3 is detected by a disconnection detecting part 2b. A switching part 1b opens and closes a contact point 1c arranged in a part of the electric wire 4a on the basis of the detecting result of the disconnection detecting part 2b by the control of a control part 2c. The control part 2c cuts off the power source supply to the driving part 1a by opening the contact point 1c of the electric wire 4a when the disconnection detecting part 2b detects the change in the voltage. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a security electric lock system that can be used in an electric lock that is attached to a door or the like and is electrically locked and unlocked, and can be prevented from being locked and unlocked by an illegal act from the outside.

  Conventionally, in order to lock and unlock a door of an office building, a public facility, or a general house, an electric lock that uses a dead bolt to be moved in and out electrically is used. As such an electric lock, for example, in addition to a normal key, a magnetic card or ID card in which a personal identification number is stored is inserted into a card reader to perform locking and unlocking, radio waves output by key operations of remote control keys, Various types of electric locks are known, such as those that lock and unlock with infrared rays and unlock signals.

  As this type of electric lock, for example, an electric lock system disclosed in Patent Document 1 below is known. The electric lock system shown in FIG. 6 determines whether the electric lock 52 is locked or unlocked by an electric lock 52 and an electric lock control unit (not shown) installed on the door 51 and electric means installed on the wall. Locking / unlocking determining means 53 for outputting a control signal for controlling the electric lock 52, and one side of the door 51 is connected to the door frame 55 by a hinge 54. Thereby, the door 51 can be freely opened and closed with respect to the door frame 55. An AC power supply (AC100V or AC200V) is supplied to the locking / unlocking determination means 53 by a power line 56, and a signal is transmitted between the locking / unlocking determination means 53 and the electric lock control unit via the electric wires 57, 58 and the transmission means A. It is supposed to be transmitted.

Japanese Patent Laid-Open No. 10-025935

  In the conventional electric lock system disclosed in Patent Document 1 described above, there is a problem that when an electric wire is disconnected by an external force due to disconnection or fraud, etc., it does not function normally as an electric lock. In this case, the electric lock system cannot determine whether or not the electric wire is disconnected, and if the electric power necessary for unlocking the electric lock is improperly applied to the electric wire disconnected from the outside during this period, There was a risk that the door was illegally unlocked and the door was opened.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a crime prevention electric lock system capable of preventing locking and unlocking due to an illegal act from the outside.

In order to achieve the above-described object, the electric security lock system according to claim 1 is configured such that the electric lock and the controller are connected by an electric wire, and the electric lock is connected to the electric lock from the power source of the controller via the electric wire. In the electric lock system that controls the locking and unlocking of the electric lock by controlling the presence or absence of power supply to the drive unit,
An electric wire for wire breakage detection comprising a wire covering the electric wire between the electric lock and the controller and including a conducting wire to which a predetermined voltage is applied from the power supply unit,
A disconnection detector for detecting a change in voltage applied to the disconnection detection wire;
A switching unit for opening and closing a contact provided in a part of the electric wire based on the detection result of the disconnection detection unit,
The presence or absence of power supply to the drive unit is controlled by opening and closing the contact based on a detection result of a change in voltage by the disconnection detection unit.

In the security electric lock system according to claim 2, the electric lock and the controller are connected by an electric wire, and whether or not the power is supplied from the power supply unit of the controller to the drive unit of the electric lock via the electric wire. In the electric lock system for controlling the locking and unlocking of the electric lock by controlling,
A high-frequency transmission unit that is provided in the controller and transmits a preset high frequency to the electric wire with respect to the power supply from the power supply unit,
A high frequency receiving unit that is provided in the electric lock and receives a power source on which a high frequency transmitted from the high frequency transmitting unit via the electric wire is superimposed,
The presence or absence of power supply to the driving unit is controlled based on whether or not a preset high frequency is superimposed on a signal received by the high frequency receiving unit.

In the security electric lock system according to claim 3, the electric lock and the controller are connected by an electric wire, and whether or not the power is supplied from the power supply unit of the controller to the drive unit of the electric lock via the electric wire. In the electric lock system for controlling the locking and unlocking of the electric lock by controlling,
The electric lock and the controller perform encryption processing on pre-stored password data and transmit / receive each other via the electric wire,
It is characterized in that mutual authentication of the encrypted password data is performed, and whether or not power is supplied to the drive unit is controlled based on the authentication result.

  As described above, according to the electric lock system of the present invention, the electric wire connecting the electric lock and the controller is covered with the wire for detecting disconnection to which a predetermined voltage is applied, If the power supply to the drive unit is controlled by detecting a change in the voltage applied to the disconnection detection wire, the drive unit will be detected when a wire breakage or disconnection due to an illegal act from the outside is detected. The power supply to the power supply can be cut off, and the locking and unlocking of the electric lock due to fraud can be prevented.

  In addition, a high frequency set in advance is superimposed on the power source output from the controller to the electric lock via the electric wire, and the drive unit is controlled depending on whether the received signal on the electric lock side includes the high frequency set in advance. If the power supply is configured to be controlled, the power supply to the drive unit can be controlled using the power line electric wire, and even if the wire is cut or disconnected due to an illegal act from the outside, it includes a preset high frequency. If no signal is input, the power supply to the drive unit can be cut off, and locking and unlocking of the electric lock due to fraud can be prevented. This improves both the security function and the reliability of the electric lock.

  Furthermore, the encryption data is subjected to encryption processing between the electric lock and the controller via the electric wire, and mutual authentication is performed. Based on the authentication result, the power supply to the drive unit is controlled. Then, even if the wire is cut or disconnected due to an illegal act from the outside, the power supply to the drive unit can be cut off if mutual authentication of the PIN code is not performed normally. Locking and unlocking can be prevented.

  Hereinafter, each form of the security electric lock system of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a first embodiment of a security electric lock system according to the present invention, FIG. 2 is a partial cross-sectional view of a breakage detection electric wire employed in the first embodiment of the security electric lock system, and FIG. FIG. 4 is a schematic configuration diagram of a second embodiment of the security electric lock system according to the present invention, and FIG. 5 is related to the present invention. It is a schematic block diagram of the 3rd form of a crime prevention electric lock system.

  As for the structure of the electric lock in which the crime prevention electric lock system of the present invention is adopted, conventionally, for example, an electric motor or solenoid is driven to lock and unlock doors of office buildings, public facilities, general houses, etc. Since it is the same as what performs locking / unlocking by making a bolt enter / exit, concrete description is abbreviate | omitted.

  First, the 1st form of the security electric lock system of this invention is demonstrated, referring FIG. 1 thru | or FIG. As shown in FIG. 1, the crime prevention electric lock system according to the first embodiment is roughly configured to include an electric lock 1 (1A) and a controller 2 (2A).

  As shown in FIG. 1, the electric lock 1 </ b> A and the controller 2 </ b> A are electrically connected by a plurality of electric wires 4 (4 a to 4 d), and each electric wire 4 is covered with a disconnection detecting electric wire 3. It has a configuration. The electric lock 1A includes a drive unit 1a such as a motor and a solenoid, a switching unit 1b such as a relay that switches on / off power supplied to the drive unit 1a, and an unlocking / unlocking operation by inputting a locking / unlocking signal from the controller 2A. A switch unit including, for example, a micro switch 11 that outputs a contact signal according to a state as a monitor signal to the controller 2A, and a reed switch 12 that outputs a door open / close signal as a monitor signal to the controller 2A according to the opening / closing of the door. have.

  As illustrated in FIG. 1, the controller 2A includes a power supply unit 2a, a disconnection detection unit 2b, and a control unit 2c. The power supply unit 2a supplies power to the disconnection detection electric wire 3 and the control unit 2c, and supplies power to the electric wire 4 via the control unit 2c. The disconnection detection unit 2b detects the voltage applied to the disconnection detection electric wire 3, and is disconnected before the electric wire 4 is disconnected depending on whether or not the detection voltage changes (whether the voltage is out of the allowable range). The presence or absence of disconnection of the detection electric wire 3 is detected. The disconnection detection unit 2b outputs an abnormality detection signal to the control unit 2c when the detection voltage changes, that is, when the voltage applied to the disconnection detection electric wire 3 is out of the allowable range.

  When a signal permitting unlocking of the electric lock 1A is input from the outside, the control unit 2c inputs a switching signal to the switching unit 1b so as to close the contact 1c of the electric wire 4 (4a). The power from the part 2a is supplied to the drive part 1a via the electric wire 4a. At that time, the contact of the micro switch 11 is switched to the unlocking side by the unlocking signal from the control unit 2c, and the contact signal at that time is sent to the control unit 2c as a monitor signal. When the door is opened after unlocking the electric lock 1A, a door opening signal is sent from the reed switch 12 to the control unit 2c as a monitor signal. Further, when an abnormality detection signal is input from the disconnection detection unit 2b, the control unit 2c inputs a switching signal to the switching unit 1b to cut off the power supply from the power supply unit 2a to the drive unit 1a, and contacts 1c of the electric wire 4a. Is controlled to open.

  The electric wire 4 forms a transmission line such as a metal wire or glass fiber. In the example of FIG. 1, the electric wire 4 (4a) which forms the power supply line for supplying power from the power supply part 2a to the drive part 1a, and the contact 1c provided on a part of the power supply line on the electric lock 1A side are turned on / off. The electric wire 4 (4b) forming a drive line for supplying a drive signal to the switching unit 1b to be switched, the contact of the micro switch 11 is switched by a locking / unlocking signal from the control unit 2c, and the contact signal at the time of switching is used as a monitor signal Electric wire 4 (4c) forming a signal line for output to the control unit 2c, electric wire 4 (4d) forming a signal line for outputting the door opening / closing signal as a monitor signal to the control unit 2c according to the opening / closing of the door Is provided.

  Here, the wire breakage detection wire 3 provided so as to cover the wire 4 is configured as shown in FIGS. The disconnection detecting electric wire 3 (3A) shown in FIG. 2 includes a conducting wire 3a, a covering material 3b, and a sheath 3c.

  The conducting wire 3a is formed in a linear shape using a low resistance metal such as copper. The conducting wire 3a has one end connected to the power supply unit 2a and the disconnection detecting unit 2b, and the other end grounded. A predetermined voltage is applied to the conducting wire 3a from the power supply unit 2a. The change in the voltage applied to the conducting wire 3a is detected by the disconnection detecting unit 2b.

  In addition, the shape of the conducting wire 3a is not limited to a linear shape, and the shape can be freely set according to the shape of the electric wire 4 and the usage environment.

  The covering material 3b is formed of an insulating member such as synthetic rubber or silicone resin. The covering material 3b is formed in a tube shape having a circular cross section and having a hollow portion. An electric wire 4 is accommodated in the hollow portion of the covering material 3b to protect the electric wire 4 from external force. Moreover, the conducting wire 3a is embed | buried under the coating | covering material 3b. In the example of FIG. 2, a plurality of conducting wires 3a are embedded in the covering material 3b at predetermined intervals in the outer peripheral direction.

  In addition, the burying position of the conducting wire 3a with respect to the covering material 3b is not limited to the central portion of the thickness. For example, when the covering material 3b is thick in the concentric direction, it may be embedded at a position close to the outer peripheral direction. Further, in the example of FIG. 2, the configuration is such that a plurality of conductors 3 a are embedded, but the same effect can be obtained even if at least one conductor 3 a is embedded depending on the shape of the electric wire 4 or the conductor 3 a, the usage environment, and the application. Play.

  The sheath 3c is provided on the outer periphery of the covering material 3b and is applied to the outermost layer of the disconnection detecting electric wire 3. The sheath 3c is formed of, for example, a vinyl chloride material or flame resistant polyethylene. The sheath 3c is for preventing damage to the covering material 3b, flooding, and the like.

  The sheath 3c described above is covered with the covering material 3b according to the use environment and application, and can be omitted without being covered.

  Next, a second embodiment of the security electric lock system according to the present invention will be described with reference to FIG. In addition, in the security electric lock system of 2nd form, the same number is attached | subjected to the component same as the security electric lock system of 1st form, and the description is abbreviate | omitted.

  The crime prevention electric lock system of the second form is roughly configured to include an electric lock 1 (1B) and a controller 2 (2B) connected by an electric wire 4. As shown in FIG. 4, the electric lock 1 </ b> B includes a driving unit 1 a, a high frequency receiving unit 1 d, a control unit 1 e, and switch units 11 and 12. Further, the controller 2B includes a power supply unit 2a, a control unit 2c, and a high frequency transmission unit 2d. An electric wire 4 is electrically connected between the electric lock 1B and the controller 2B.

  The high frequency receiver 1d of the electric lock 1B receives a signal (a power source on which the high frequency is superimposed) transmitted from the high frequency transmitter 2d of the controller 2A via the electric wire 4, and outputs this received signal to the controller 2c. ing. The control unit 1e determines whether or not a high frequency having the preset frequency (the same frequency as the high frequency set by the control unit 2c of the controller 2B) is superimposed on the signal received by the high frequency receiving unit 1d. . When the control unit 1e determines that the reception signal of the high frequency receiving unit 1d includes a high frequency having a preset frequency, the control unit 1e outputs a power source necessary for driving to the driving unit 1a to drive and control the driving unit 1a. Yes.

  The high frequency transmission unit 2d of the controller 2B superimposes a high frequency having a preset frequency on the power supply from the power supply unit 2a and transmits it to the electric wire 4. The control unit 2c controls transmission of a signal from the high frequency transmission unit 2d so as to transmit a signal to the electric wire 4 by superimposing a high frequency with a preset frequency on the power supply from the power supply unit 2a.

  In the example of FIG. 4, only one electric wire 4 is illustrated, but monitor signals (locking / unlocking) of the switch units 11 and 12 as well as electric wires forming a power supply line for supplying power to the driving unit 1 a are illustrated. Signal, door opening / closing signal) is provided to form a signal line for outputting to the controller 2c. In this case, a configuration is used in which high frequencies having frequencies set in advance are superimposed on all signals transmitted from the control unit 2c to the electric wires 4, and whether or not high frequencies having frequencies set for each signal are superimposed. You can also

  Next, a third embodiment of the security electric lock system according to the present invention will be described with reference to FIG. Note that, in the security electric lock system of the third embodiment, the same components as those of the first and second security electric lock systems are denoted by the same reference numerals, and the description thereof is omitted.

  The crime prevention electric lock system of the third form is roughly configured to include an electric lock 1 (1C) and a controller 2 (2C) connected by an electric wire 4. In the crime prevention electric lock system of the third embodiment, mutual authentication is performed between the electric lock 1C and the controller 2C via the electric wire 4 through encrypted communication, and the power to the drive unit 1a is based on the authentication result. The presence or absence of supply is controlled, and the locking / unlocking of the electric lock 1C is controlled.

  As shown in FIG. 5, the electric lock 1C includes a drive unit 1a, a control unit 1e, a communication I / F (interface) unit 1f, an encryption storage unit 1g, an encryption processing unit 1h, and switch units 11 and 12. . The controller 2C includes a power supply unit 2a, a control unit 2c, an encryption storage unit 2e, an encryption processing unit 2f, and a communication I / F (interface) unit 2g. An electric wire 4 is electrically connected between the electric lock 1C and the controller 2C.

  Here, the control unit 2c, the encryption storage unit 2e, the encryption processing unit 2f, and the communication I / F unit 2g in the controller 2C perform encryption processing on the password data of the controller 2C and transmit it to the electric wire 4, and The encryption processing transmission unit 2Ca is configured to authenticate the encrypted signal transmitted from the lock 1C and notify the result to the electric lock 1C. In addition, the control unit 1e, the communication I / F unit 1f, the encryption storage unit 1g, and the encryption processing unit 1h in the electric lock 1C authenticate encrypted signals transmitted to and from the controller 2C via the electric wire 4. The power control unit 1Ca is configured to control the presence or absence of power supply to the drive unit 1a based on the authentication result.

  The communication I / F unit 1f of the electric lock 1C transmits and receives the encrypted signal from the communication I / F unit 2g of the controller 2C via the electric wire 4, and receives the encrypted signal received from the controller 2C via the electric wire 4. It is output to the encryption processing unit 1h. For example, a serial number and an IP address are stored in the encryption storage unit 1g as authentication data for authenticating the password data of the electric lock 1C and the encrypted signal from the controller 2C. The encryption processing unit 1h performs encryption processing on the password data of the electric lock 1C and outputs it to the communication I / F unit 1f, and also authenticates the encrypted signal received from the controller 2C by the communication I / F unit 1f. Is performed based on the authentication data stored in the encryption storage unit 1g, and the authentication result is output to the control unit 1e. Based on the authentication result of the encrypted signal from the controller 2C side by the encryption processing unit 1h and the notification of the authentication result of the electric lock 1C from the controller 2C, the control unit 1e determines whether power is supplied to the drive unit 1a. I have control. That is, the control unit 1e controls supply of power from the power supply unit 2a to the drive unit 1a when the electric lock 1C and the controller 2C are normally authenticated.

  The controller 2c of the controller 1C controls power supply to the electric lock 1C via the electric wire 4. The control unit 2c outputs a locking / unlocking signal (locking signal or unlocking signal) to the encryption processing unit 2f when a signal permitting the locking / unlocking of the electric lock 1C is input from the outside. For example, a serial number and an IP address are stored in the encryption storage unit 2e as authentication data for authenticating the personal identification data of the controller 1C and the encrypted signal from the electric lock 1C. When the lock / unlock signal is input as a trigger from the control unit 2c, the encryption processing unit 2f performs encryption processing on the personal identification data of the controller 1C stored in the encryption storage unit 2e and outputs it to the communication I / F unit 2g. In addition, authentication of the encrypted signal from the electric lock 1C received by the communication I / F unit 2g is performed based on the authentication data stored in the cipher storage unit 2e, and the authentication result is sent to the communication I / F unit 2g. Is output. The communication I / F unit 2 g transmits the encrypted signal encrypted by the encryption processing unit 2 f to the electric wire 4. The communication I / F unit 2g transmits the authentication result of the encrypted signal transmitted from the electric lock 1C side to the electric wire 4 and notifies the electric lock 1C.

  Here, the above-described encryption process will be described. Encryption means that data is converted according to a rule in which input / output data and a personal identification number are determined so that they cannot be seen or falsified by a third party. For this encryption, a “key” corresponding to the encryption table is used, but there are public key encryption using two pairs of keys and secret key encryption using the same key for both. Examples of public key cryptography include RSA (Rivest Shamir Adleman), ElGamal cryptography, and elliptic curve cryptography. Examples of the secret key cryptography include DES (Data Encryption Standard), IDEA (International Data Encryption Algorithm), FEAL (Fast data Encipherment ALgorihtme), MISTY, and the like. In addition to the processing using the public key encryption and the secret key encryption, scramble processing or the like can be used.

  In addition, RS-485, Ethernet (R), etc. can be used for the communication interface at the time of carrying out the encryption communication mentioned above, for example.

  Next, the operation of the security electric lock system according to the first to third embodiments described above will be described with reference to specific usage examples. The crime prevention electric lock system according to the first to third embodiments is employed for an electric lock provided in an entrance hall of a building such as an office building or a public facility, a door installed at a service entrance, or the like.

  The electric lock 1 (1A to 1C) in FIG. 1, FIG. 4 and FIG. 5 is an electric wire from the power supply unit 2a of the controller 2 (2A to 2C) when a person who permits unlocking performs a predetermined unlocking operation. Power is supplied through 4, and the drive unit 1 a such as a motor or a solenoid is operated and unlocked by the supply of this power. Here, there is a possibility that the electric lock is illegally unlocked by cutting the electric wire 4 by an external force and applying a voltage necessary to operate the drive unit 1a from the outside to the cut electric wire 4.

  Therefore, in the security electric lock system according to the first embodiment, as shown in FIG. 1, the disconnection detecting electric wire 3 (3A or 3B) is connected in advance to the electric wires 4 (4a to 4d) connecting the electric lock 1A and the controller 2A. ). For example, in the disconnection detecting electric wire 3A shown in FIG. 2, a conductor 3a is embedded in a covering material 3b in which the electric wire 4 is accommodated, and a sheath 3c is formed so as to cover the covering material 3b. When this disconnection detecting electric wire 3A is used, the electric wires 4 (4a to 4b) connecting the electric lock 1A and the controller 2A are accommodated in the hollow portion of the covering material 3b. And each electric wire 3A for disconnection detection which accommodated the electric wire 4 electrically connects the conducting wires 3a which the adjacent disconnection detection electric wire 3A opposes, and makes it one line. In the example of FIG. 2, since the conducting wire 3a is six, six lines are formed. Then, one end of each line is connected to the power supply unit 2a and the disconnection detection unit 2b, and the other end is grounded. In this state, a voltage is applied from the power supply unit 2a to each conducting wire 3a of the disconnection detecting electric wire 3A.

  If there is an illegal act of disconnecting the electric wire 4 due to an external force, the disconnection detecting electric wire 3A covered with the electric wire 4 is cut before the electric wire 4, and the voltage applied to the conducting wire 3a changes. To do. When the disconnection detection unit 2b detects this change in voltage, a switching signal for disconnecting the power supply line is input from the control unit 2c to the switching unit 1b. The switching unit 1b opens the contact 1c on the electric wire 4a when a switching signal for cutting the power supply line is input from the control unit 2c. Thereby, the electric wire 4a which forms a power supply line is opened, and power supply to the drive unit 1a such as a motor and a solenoid for unlocking the electric lock 1A is cut off. As a result, the lock / unlock of the electric lock 1A becomes impossible, and it is possible to prevent the lock / unlock by an illegal act on the electric lock 1A, thereby enhancing the crime prevention effect. In addition, the control part 2c can also output an alarm signal outside simultaneously with performing the control which opens the contact 1a on the electric wire 4a.

  As described above, in the crime prevention electric lock system according to the first embodiment, the disconnection detecting electric wire 3 to which a predetermined voltage is applied is covered with the electric wire 4 connecting the electric lock 1A and the controller 2A. And when trying to cut the electric wire 4 from the outside by an illegal act, the electric wire 4 for disconnection detection is cut before the electric wire 4, and the voltage applied to the electric wire 3 for disconnection detection changes. When the disconnection detection unit 2b detects a change in voltage, the switching unit 1b opens the contact 1c on the electric wire 4a under the control of the control unit 2c. Thereby, since the electric wire 4a is in an open state and the power supply to the drive unit 1a of the electric lock 1A is cut off, it is possible to prevent the electric lock 1A from being locked and unlocked due to an illegal act from the outside.

  In the crime prevention electric lock system of the first embodiment, the voltage applied to the disconnection detection electric wire 3 is detected by the disconnection detection unit 2b of the controller 2A, and the control unit 2c is switched based on the detection result. However, the disconnection detection unit 2b and the control unit 2c may be provided in the electric lock 1A to perform the same control.

  Next, in the security electric lock system according to the second embodiment, when a predetermined locking / unlocking operation is performed by a person who is permitted to lock / unlock the electric lock 1B, the power supply from the power supply unit 2a of the controller 2B turns on the control unit 2c. And input to the high-frequency transmitter 2d. The high-frequency transmission unit 2d transmits a high frequency of a predetermined frequency to the power supply from the control unit 2c and transmits it to the electric wire 4. The high frequency receiving unit 1d of the electric lock 1B receives a signal (a power source on which a high frequency is superimposed) from the electric wire 4 and outputs the signal to the control unit 1e. The control unit 1e determines whether or not the reception signal from the high frequency reception unit 1d includes a preset high frequency. If it is determined that the received signal from the high frequency receiving unit 1d includes a preset high frequency, for example, in the case of a power source including a preset high frequency, a necessary driving power is supplied to the driving unit 1a. Thereby, the unlocking of the electric lock 1B is controlled. On the other hand, if it is determined that the preset high frequency is not included in the reception signal of the high frequency receiving unit 1d, the power supply to the driving unit 1a is cut off.

  As described above, in the crime prevention electric lock system according to the second embodiment, when a person who is permitted to lock / unlock the electric lock 1B performs a locking / unlocking operation (particularly, an unlocking operation), the power source on which a preset high frequency is superimposed is controlled. 2B is transmitted from the device 2B to the electric wire, the electric power transmitted to the electric wire is received by the electric lock 1B side, and it is recognized whether or not the power includes a preset high frequency, and the presence or absence of power supply to the drive unit 1a is controlled. doing. As a result, power supply to the drive unit 1a can be controlled using a simple high-frequency transmission / reception circuit and a power line. When a signal other than a preset high frequency is input, the power supply to the drive unit 1a is cut off. Therefore, the electric wire 4 is cut by an improper action from an external force, and the electric lock 1B cannot be unlocked only by applying a predetermined voltage from the cut portion of the electric wire 4, and the crime prevention effect can be enhanced.

  Next, in the crime prevention electric lock system of the third embodiment, necessary power is supplied to each part of the electric lock 1C from the power supply unit 2a of the controller 2C. Now, when a predetermined locking / unlocking operation is performed by a person who is permitted to lock / unlock, the encryption processing unit 2f performs encryption processing on the personal identification data of the controller 1C stored in the encryption storage unit 2e to perform communication I / O. Output to F part 2g. This encrypted signal is transmitted from the communication I / F unit 2g to the electric wire 4. When the communication I / F unit 1f of the electric lock 1C receives the encrypted signal via the electric wire 4, the communication I / F unit 1f outputs the received encrypted signal to the encryption processing unit 1h. The encryption processing unit 1h authenticates the encrypted signal received by the communication I / F unit 1f based on the authentication data in the encryption storage unit 1g. When the encryption processing unit 1h successfully authenticates the encrypted signal, the encryption processing unit 1h performs encryption processing on the password data of the electric lock 1C stored in the encryption storage unit 1b under the control of the control unit 1e, and performs communication I / F unit Output to 1f. This encrypted signal is transmitted from the communication I / F unit 1 h to the electric wire 4. When the communication I / F unit 2g of the controller 1C receives the encrypted signal via the electric wire 4, the communication I / F unit 2g outputs the received encrypted signal to the encryption processing unit 2f. The encryption processing unit 2f authenticates the encrypted signal received by the communication I / F unit 2g based on the authentication data in the encryption storage unit 2e. When the encryption processing unit 2f authenticates the encrypted signal normally, the encryption processing unit 2f notifies the electric lock 1C through the electric wire 4 that the control unit 2c has successfully authenticated. When the electric lock 1C receives notification from the controller 1C that the encrypted signal has been normally authenticated, the electric lock 1C supplies power necessary for driving to the drive unit 1a to control the unlocking of the electric lock 1C. As a result, when the password data of the electric lock 1C and the controller 2C are not normally mutually authenticated, the power supply to the drive unit 1a is cut off, so that the electric wire 4 is cut by an improper action from an external force. Therefore, the electric lock 1B cannot be unlocked only by applying a predetermined voltage to the crime prevention effect.

  As described above, in the crime prevention electric lock system according to the third embodiment, when a person who is permitted to lock / unlock the electric lock 1C performs a lock / unlock operation (particularly, an unlock operation), the electric lock 1C and the controller 2C are connected via the electric wire 4. The password data is mutually authenticated, and the presence / absence of power supply to the drive unit 1a is controlled based on the authentication result. As a result, the power supply to the drive unit 1a is cut off if the mutual authentication is not normally performed. As a result, the electric wire 4 is cut by an improper action from an external force, and the electric lock 1B cannot be unlocked only by applying a predetermined voltage from the cut portion of the electric wire 4, and the crime prevention effect can be enhanced.

  By the way, the disconnection detecting electric wire 3 employed in the security electric lock system of the first embodiment has the same effect regardless of which of the configurations shown in FIGS. Further, depending on the use environment and application, the configurations shown in FIGS. 2 and 3 can be used in combination.

  Moreover, the shape of the disconnection detection electric wire 3 used in the security electric lock system of the first embodiment is not limited to that shown in FIGS. 2 and 3, and the disconnection detection electric wire 3 is cut before the electric wire 4. Since it is sufficient to provide only 4 so as not to be cut, a wide variety of configurations are conceivable, such as covering in a lattice shape, for example, by overlapping a plurality of wires on a concentric circle with the electric wire 4 and attaching them.

  Furthermore, the structure of the security electric lock system of each form mentioned above is not restricted to what is illustrated, The structure of the security electric lock system of each form can also be combined according to a use environment or a use. For example, the disconnection detection electric wire 3 used in the security electric lock system of the first form is covered with the electric wire 4 in the security electric lock system of the second form or the third form, or used in the security electric lock system of the second form. If a configuration in which a high frequency is superimposed on a power source or a signal is adopted in the security electric lock system of the third form or a security electric lock system that combines the first to third forms is adopted, the crime prevention effect can be further enhanced.

It is a schematic structure figure of the 1st form of a security electric lock system concerning the present invention. It is a fragmentary sectional view of the electric wire for disconnection detection employ | adopted for the crime prevention electric lock system of the 1st form of FIG. It is a schematic explanatory drawing which shows the other example of the electric wire for a disconnection detection employ | adopted as the crime prevention electric lock system of the 1st form of FIG. It is a schematic block diagram of the 2nd form of the crime prevention electric lock system which concerns on this invention. It is a schematic block diagram of the 3rd form of the crime prevention electric lock system which concerns on this invention. It is a schematic explanatory drawing which shows the structure of the conventional electric lock system.

Explanation of symbols

1 (1A, 1B, 1C) Electric lock 1Ca Power supply control unit 1a Drive unit 1b Switching unit 1c Contact point 1d High frequency receiving unit 1e Control unit 1f Communication I / F unit 1g Encryption storage unit 1h Encryption authentication unit 2 (2A, 2B, 2C ) Controller 2Ca Encryption processing transmission unit 2a Power supply unit 2b Disconnection detection unit 2c Control unit 2d High frequency transmission unit 2e Encryption storage unit 2f Encryption authentication unit 2g Communication I / F unit 3 Disconnection detection wire 4 (4a, 4b, 4c, 4d) ) Electric wire 11 Micro switch (switch part)
12 Reed switch (switch part)

Claims (3)

The electric lock and the controller are connected by an electric wire, and the electric lock is controlled to be unlocked by controlling whether or not power is supplied from the power supply unit of the controller to the drive unit of the electric lock via the electric wire. In the electric lock system
An electric wire for wire breakage detection comprising a wire covering the electric wire between the electric lock and the controller and including a conducting wire to which a predetermined voltage is applied from the power supply unit,
A disconnection detector for detecting a change in voltage applied to the disconnection detection wire;
A switching unit for opening and closing a contact provided in a part of the electric wire based on the detection result of the disconnection detection unit,
A crime prevention electric lock system, wherein the presence or absence of power supply to the drive unit is controlled by opening and closing the contact based on a detection result of a voltage change by the disconnection detection unit. The electric lock and the controller are connected by an electric wire, and the electric lock is controlled to be unlocked by controlling whether or not power is supplied from the power supply unit of the controller to the drive unit of the electric lock via the electric wire. In the electric lock system
A high-frequency transmission unit that is provided in the controller and transmits a preset high frequency to the electric wire with respect to the power supply from the power supply unit,
A high frequency receiving unit that is provided in the electric lock and receives a power source on which a high frequency transmitted from the high frequency transmitting unit via the electric wire is superimposed,
A security electric lock system, wherein the presence or absence of power supply to the drive unit is controlled based on whether or not a preset high frequency is superimposed on a signal received by the high frequency receiving unit. The electric lock and the controller are connected by an electric wire, and the electric lock is controlled to be unlocked by controlling whether or not power is supplied from the power supply unit of the controller to the drive unit of the electric lock via the electric wire. In the electric lock system
The electric lock and the controller perform encryption processing on pre-stored password data and transmit / receive each other via the electric wire,
A crime prevention electric lock system characterized by performing mutual authentication of the encrypted password data and controlling the power supply to the drive unit based on the authentication result.

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