JP2015168945A - Lock system using human body communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock system capable of unlocking a mechanical lock and an electronic lock by only an operation for unlocking the mechanical lock even when two of the mechanical lock and the electronic lock are provided.SOLUTION: A lock system 1 includes a mechanical lock 2 and an electronic lock 3. The mechanical lock 2 includes a contact terminal 25 which is brought into electrical contact with a physical key 4 which is inserted into a key hole 24 and has conductivity and collates the physical key 4 inserted into the key hole 24. An electronic lock 3 electrically connected to the contact terminal 25 of the mechanical lock 2 uses the physical key 4 inserted into the key hole 24 as an electrode for human body communication, performs human body communication with human body communication equipment 5 possessed by a user 6 inserting the physical key 4 into the key hole 24, and collates authentication information acquired from the human body equipment 5.

Description

  The present invention relates to a lock system in which a door such as an entrance door is used for locking. More specifically, the present invention uses human body communication using a human body as a communication path for data communication.

  At present, physical keys such as cylinder lock keys are often used as keys for locking and unlocking locks provided on entrance doors. However, a lock using a physical key is technically capable of unlocking the lock even if it is not the owner of the original physical key due to unauthorized duplication or picking of the physical key. It is desired to improve the security of the lock.

  As a lock to improve security against picking, a lock (for example, Patent Document 1) that uses a dimple key having a small dimple on the surface and collates the dimple provided on the surface of the dimple key has already been developed. ing.

  Also, by providing a single door with a mechanical lock that is a mechanical lock that uses a physical key for locking and unlocking, and an electronic lock that is an electronic lock that verifies authentication information, security related to unlocking can be improved. Is also possible. However, the above method requires two operations: unlocking the mechanical lock and unlocking the electronic lock to unlock one door. The authentication information necessary for unlocking the electronic lock is stored in the physical key, and when unlocking the mechanical lock using the physical key, the authentication information is read from the physical key and verified to unlock the mechanical lock. It has also been studied that the mechanical lock and the electronic lock can be unlocked by the operation (for example, Patent Documents 2 and 3).

JP 2003-247364 A Japanese Patent Laid-Open No. 11-007513 JP 2006-112118 A

  However, in the conventional invention, when the electronic device that transmits the authentication information necessary for unlocking the electronic lock is separated from the physical key, the mechanical lock and the electronic lock are unlocked only by the operation of unlocking the mechanical lock. I couldn't.

  Therefore, in the present invention, in order to improve the security of the lock, two mechanical locks and an electronic lock are provided, and the electronic device that transmits authentication information necessary for unlocking the electronic lock is separated from the physical key. However, an object is to provide a lock system that can unlock a mechanical lock and an electronic lock only by an operation of unlocking the mechanical lock.

  1st invention which solves the subject mentioned above is provided with the contact terminal which electrically contacts with the physical key which has the electric conductivity inserted in the keyhole, The mechanical lock which collates the physical key inserted in the keyhole, Electrically connected to the contact terminal, comprising human body communication means using the physical key inserted into the keyhole as an electrode for human body communication, and using the human body communication means, the physical key was inserted into the keyhole A lock system comprising at least an electronic lock that performs human body communication with a human body communication device possessed by a person and collates authentication information acquired from the human body communication device. According to the first invention, by inserting the physical key into the keyhole of the mechanical lock, the electronic lock and the human body communication device become in a state where human body communication is possible, and authentication information is verified on the electronic lock side. Therefore, in addition to the mechanical lock, the electronic lock can be unlocked by the operation of unlocking the mechanical lock.

  Further, the second invention is an invention in which the present invention is applied to a widely used cylinder lock in the lock system described in the first invention, and can be rotated between a fixed outer cylinder and the outer cylinder. A cylinder lock mechanism that has a stored inner cylinder and inhibits rotation of the inner cylinder by a tumbler that is pressurized by a spring is used as the mechanism of the mechanical lock that collates the physical key inserted into the key hole. , At least one of the tumblers is configured to also serve as the contact terminal.

  Furthermore, the third invention is an invention in which the mechanical lock cannot be unlocked when the electronic lock is not unlocked in the lock system described in the second invention. A drive mechanism that electrically switches between enabling and disabling of the inner cylinder is provided, and when the verification of the authentication information is successful, the drive mechanism is controlled so that the inner cylinder is rotatable.

  Thus, according to the present invention described above, in order to improve the security of the lock, two mechanical locks and an electronic lock are provided, and an electronic device and a physical key that transmit authentication information necessary for unlocking the electronic lock are provided. Even if it is a separate case, it is possible to provide a lock system that can unlock the mechanical lock and the electronic lock only by the operation of unlocking the mechanical lock.

The figure explaining the structure of the lock system which concerns on this embodiment. The figure explaining a lock system to this embodiment. The figure explaining the physical key which a user possesses. The figure explaining the human body communication apparatus which a user possesses. The figure explaining operation | movement of a lock system. The figure explaining the state of the lock system when a physical key is inserted in the keyhole. The figure explaining the state of the lock system when unlocking is possible. The figure explaining the form which provides the contact terminal different from a tumbler.

  From here, preferred embodiments of the present invention will be described. The following description is not intended to limit the scope of the present invention, but is provided to aid understanding.

  FIG. 1 is a diagram illustrating a configuration of a lock system 1 according to the present embodiment. The lock system 1 according to the present embodiment has a keyhole 24 into which a conductive physical key 4 is inserted, and a mechanical lock 2 for collating the physical key 4 inserted into the keyhole 24 and a human body communication possessed by the user 6. In FIG. 1, a lock lock system 1 is provided at the entrance door 7 and the user 6 who is permitted to use the entrance door 7 is a system that is configured at least from the electronic lock 3 that verifies the authentication information obtained from the device 5. , Possess a physical key 4 necessary for unlocking the mechanical lock 2 and a human body communication device 5 necessary for unlocking the electronic lock 3.

  FIG. 2 is a diagram illustrating the lock system 1 according to the present embodiment. In FIG. 2, the structure of the mechanical lock 2 of the lock system 1 is a widely used cylinder lock structure. As illustrated in FIG. 2, the mechanical lock 2 according to the present embodiment includes an outer cylinder 20 that is fixed and an inner cylinder 21 that can rotate inside the outer cylinder 20 in the same manner as a general cylinder lock. , A plurality of pin-shaped tumblers 22 (here, six) composed of an upper pin 22a and a lower pin 22b. Although not shown in FIG. 2, a cam for transmitting the rotation of the inner cylinder 21 is attached to the left end of the inner cylinder 21 facing the key hole 24, and the dead bolt moves to the unlocking position by this cam. The mechanical lock 2 is unlocked.

  The tumbler 22 included in the mechanical lock 2 is a member that inhibits the rotation of the inner cylinder 21. In the state shown in FIG. 2, the tumbler 22 that is pressurized by a metal spring 23 is the inner cylinder 21 and the outer cylinder of the mechanical lock 2. 20, the upper pin 22a of each tumbler 22 gets in the way, and the inner cylinder 21 of the mechanical lock 2 cannot be rotated in the unlocking direction.

  In the mechanical lock 2 of the present embodiment, at least one of the tumblers 22 included in the mechanical lock 2 is electrically connected to the electronic lock 3 so that the physical key 4 inserted into the keyhole 24 can be used as an electrode for human body communication. In FIG. 2, the third tumbler 22 from the left side is configured to also serve as the contact terminal 25.

  The electronic lock 3 of the lock system 1 according to the present embodiment is an electronic device to which power is supplied from an external power source such as a dry battery, and is physically connected to the contact terminal 25 of the mechanical lock 2 and inserted into the key hole 24. Authentication information obtained from the human body communication means 30 using the key 4 as an electrode for human body communication and the human body communication device 5 that communicates with the human body communication means 30 are collated, and the unlocking is electrically performed based on the collation result of the authentication information. The electronic lock control means 31 to control is provided.

  In the present embodiment, since the electronic lock 3 must receive at least authentication information from the human body communication device 5, the human body communication means 30 of the electronic lock 3 can communicate with the human body via the connection terminal 25 that also serves as the tumbler 22. The function of demodulating the electric signal input from the device 5 is provided. The electronic lock control means 31 of the electronic lock 3 is a means realized by using a small IC chip having a CPU, RAM, ROM, etc. The human body communicating with the human body communication means 30 is stored in the ROM of the IC chip. A program for collating authentication information obtained from the communication device 5 is stored.

  In addition, the electronic lock 3 according to the present embodiment has a lock pin 33 that inhibits the rotation of the inner cylinder 21 of the mechanical lock 2 as a drive mechanism that electrically switches between rotation and non-rotation of the inner cylinder 21 of the mechanical lock 2. And an electromagnetic actuator 32 for driving the lock pin 33. An insertion hole 34 for inserting the lock pin 33 of the electronic lock 3 is provided on the left end side of the inner cylinder 21 of the mechanical lock 2. When the verification of verification information is not successful, the lock pin 33 is inserted into the insertion hole 34. In this state, the lock pin 33 gets in the way, and the inner cylinder 21 of the mechanical lock 2 cannot be rotated in the unlocking direction.

  Next, the physical key 4 possessed by the user 6 will be described. FIG. 3 is a diagram for explaining the physical key 4 possessed by the user 6. The physical key 4 according to the present embodiment is used for unlocking the mechanical lock 2 and is used as an electrode for human body communication. Therefore, the material of the physical key 4 is a conductive material (for example, metal). I need it. The physical key 4 in the present embodiment is plate-shaped, and the blade portion of the physical key 4 is formed with a mountain-valley shape for pushing up the tumbler 22 of the mechanical lock 2. Note that the shape of the ridges and valleys of the physical key 4 that can unlock the mechanical lock 2 is such that when the physical key 4 is inserted into the key hole 24 of the mechanical lock 2, the boundary between the upper pin 22a and the lower pin 22b of the tumbler 22 is It is designed to be a boundary between the inner cylinder 21.

  FIG. 4 is a diagram for explaining the human body communication device 5 possessed by the user 6. The human body communication device 5 possessed by the user 6 includes an electrode 50 used for human body communication, a human body communication means 51 for performing human body communication using the electrode 50, authentication information (for example, a key code) after human body communication is possible. Is transmitted to the human body communication device 5.

  Human body communication methods are roughly divided into an electric field method and a current method, and the form of the electrode 50 of the human body communication device 5 differs depending on the human body communication method. For example, when the current method is adopted, the electrode 50 of the human body communication device 5 is composed of a pair of electrode plates in contact with the human body (here, the user 6). Further, since at least authentication information must be transmitted to the electronic lock 3 in order to unlock the electronic lock 3, the human body communication means 51 of the human body communication device 5 modulates and modulates an electric signal flowing through the human body. A function of applying a voltage corresponding to the electric signal to the electrode 50 is provided. The device control means 52 of the human body communication device 5 is realized by using a small IC chip having a CPU, RAM, ROM, etc. The human body communication means 50 of the human body communication device 5 is stored in the ROM of the IC chip. The program etc. which transmit authentication information using are stored.

  5 is a diagram for explaining the operation of the lock system 1, FIG. 6 is a diagram for explaining the state of the lock system 1 when the physical key 4 is inserted into the key hole 24, and FIG. 7 is for unlocking. It is a figure explaining the state of the lock system 1 at the time.

  When the user 6 unlocks the entrance door 7, the user 6 performs an operation of inserting the physical key 4 possessed by the user 6 into the key hole 24 of the mechanical lock 2 (S1).

  When the physical key 4 is inserted into the key hole 24, each tumbler 22 of the mechanical lock 2 is pushed up along the shape of the valley formed on the blade portion of the physical key 4, thereby forming the blade portion of the physical key 4. The shapes of the peaks and valleys are collated (S2). As shown in FIG. 6, in the case of the physical key 4 in which the unlocking of the mechanical lock 2 is permitted, the tumbler 22 is pushed up in accordance with the valley shape formed on the physical key 4, so that the upper pin 22 a of the tumbler 22 is pushed. And the lower pin 22b all coincide with the boundary between the inner cylinder 21 and the outer cylinder 20, and the inner cylinder 21 of the mechanical lock 2 becomes rotatable.

  Further, as shown in FIG. 6, when the user 6 inserts the physical key 4 into the key hole 24 of the mechanical lock 2, the contact terminal 25, which is also used as the tumbler 22, is in a state where the spring 23 is pressed. Furthermore, since the physical key 4 is in contact with the hand of the user 6, the physical key 4 includes at least a contact terminal 25 that is also used as the tumbler 22, the physical key 4, the human body of the user 6, and the electrode 50 of the human body communication device 5. A communication path is formed (S3), and the human body communication between the human body communication device 5 possessed by the user 6 and the electronic lock 3 becomes possible. Since the user 6 always touches the physical key 4 when unlocking the mechanical lock 2, it is preferable to adopt a current method that is not easily affected by external noise as a human body communication method.

  When the human body communication becomes possible, the device control means 52 of the human body communication device 5 operates the human body communication means 51 of the human body communication device 5 and transmits the authentication information to the electronic lock 3 by human body communication (S4). When the human body communication means 30 of the electronic lock 3 receives the authentication information transmitted from the human body communication device 5, the electronic lock control means 31 of the electronic lock 3 stores the authentication information received from the human body communication device 5 in the electronic lock 3 in advance. The authentication information received from the human body communication device 5 is verified (S5).

  Next, the electronic lock control means 31 of the electronic lock 3 branches the process based on the verification result of the authentication information (S6), and when the verification of the authentication information is successful, the electromagnetic actuator 32 is operated to activate the lock pin 33. The electronic lock 3 is unlocked by moving to the retracted position (S7). When the verification of the authentication information fails, the electronic lock control means 31 of the electronic lock 3 does not operate to move the lock pin 33 to the retracted position by operating the electromagnetic actuator 32.

  When the user 6 inserts the physical key 4 into the keyhole 24 of the mechanical lock 2 and then performs an operation of rotating the physical key 4 in the unlocking direction (S8), the inner cylinder 21 of the mechanical lock 2 is rotatable and electronic When the lock 3 is in the unlocked state, as shown in FIG. 7, all the boundaries between the upper pin 22 a of the tumbler 22 of the mechanical lock 2 and the lower pin 22 b of the tumbler 22 of the mechanical lock 2 are connected to the outer cylinder 20 and the inner cylinder 21. Furthermore, since the lock pin 33 of the electronic lock 3 is in the retracted position, the inner cylinder 21 of the mechanical lock 2 rotates in the unlocking direction and is connected to the inner cylinder 21 of the mechanical lock 2. The mechanical lock 2 is unlocked by the rotation of the cam (S9), and this procedure ends. When the inner cylinder 21 of the mechanical lock 2 is not rotatable or the electronic lock 3 is not unlocked, the rotation of the inner cylinder 21 of the mechanical lock 2 is inhibited by at least one of the tumbler 22 or the lock pin 33. Therefore, since the inner cylinder 21 of the mechanical lock 2 is not rotatable, the mechanical lock 2 is not unlocked, and this procedure ends.

  As described above, according to the lock system 1 according to the present embodiment, the rotation of the inner cylinder 21 of the mechanical lock 2 is inhibited by the tumbler 22 of the mechanical lock 2 and the lock pin 33 of the electronic lock 3. The operation of unlocking 2 and the operation of unlocking the electronic lock 3 should be necessary, but when the user 6 inserts the physical key 4 into the key hole 24 of the mechanical lock 2, the electronic lock 3 and the human body communication device 5 Since the authentication information is automatically verified on the electronic lock 3 side, the electronic lock 3 can be unlocked in addition to the mechanical lock 2 by the operation of unlocking the mechanical lock 2.

  In the present embodiment, the physical key 4 having a mountain-valley shape is used. However, the physical key 4 can also be realized by a dimple key having an uneven shape formed on the surface of the key. In this embodiment, the lock pin 33 of the electronic lock 3 is provided so as to inhibit the rotation of the inner cylinder 21 of the mechanical lock 2. However, the lock pin 33 is provided so as to inhibit the entrance door 7 from opening. It can also be provided. In addition, a configuration in which the contact terminal 25 is provided separately from the tumbler 22 without using the tumbler 22 and the contact terminal 25 is also conceivable.

  FIG. 8 is a diagram illustrating a form in which a contact terminal different from the tumbler 22 is provided. In FIG. 8, the same reference numerals are used for elements that are not changed from FIG. In the lock system 1a shown in FIG. 8, a leaf spring-like contact terminal 26 that contacts the physical key 4 inserted into the key hole 24 is provided on the side facing the tumbler 22 of the outer cylinder 20 of the mechanical lock 2a. The leaf spring-like contact terminal 26 and the human body communication means 30 of the electronic lock 3 are connected.

DESCRIPTION OF SYMBOLS 1 Lock system 2 Mechanical lock 20 Outer cylinder 21 Inner cylinder 22 Tumbler 23 Spring 24 which pressurizes tumbler 24 Key hole 25 Contact terminal used also as a tumbler 3 Electronic lock 30 Human body communication means 31 Electronic lock control means 32 Electromagnetic actuator 4 Physical key 5 Human body communication Equipment 50 Electrode 51 Human body communication means 52 Equipment control means 6 User 7 Entrance door

Claims (3)

A mechanical lock comprising a contact terminal in electrical contact with a conductive physical key inserted into the keyhole, for collating the physical key inserted into the keyhole;
Electrically connected to the contact terminal, comprising human body communication means using the physical key inserted into the keyhole as an electrode for human body communication, and using the human body communication means, the physical key was inserted into the keyhole An electronic lock for human body communication with a human body communication device possessed by a person, and for verifying authentication information acquired from the human body communication device;
A lock system characterized by comprising at least   A cylinder lock mechanism having a fixed outer cylinder and an inner cylinder rotatably housed in the outer cylinder, and preventing rotation of the inner cylinder by a tumbler pressurized by a spring, is inserted into the key hole. Used as a mechanism of the mechanical lock for collating the physical key, and at least one of the tumblers is electrically connected to the electronic lock, and at least one of the tumblers is also used as the contact terminal. The lock system according to claim 1, wherein: The electronic lock includes a drive mechanism that electrically switches between rotation and non-rotation of the inner cylinder of the mechanical lock, and the drive mechanism is configured to be rotatable when the verification of the authentication information is successful. The lock control system according to claim 2, wherein the lock control system is controlled.

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