JP2006188813A - Carry-away prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize power savings and radio savings in a carry-away prevention system for protecting an object to be protected. <P>SOLUTION: This carry-away prevention system comprises: a key element 4 for authentication, which is possessed by a specific person with legitimate authority; a locking mechanism for locking the object to be protected, so that the object to be protected cannot be carried away; a starting action detecting means 33 for outputting an authentication starting signal by detecting that the specific person or a person except the specific person takes a positive action for carrying out the object to be protected; a means 31 for authentication and control, which establishes communications with the key element 4 when the authentication starting signal is output from the means 33, and outputs an unlocking signal on necessary condition that the signal from the key element for the authentication includes unlocking authority; and a lock driving means for performing switching to a state wherein a lock can be released in an automatic or driven manner, by actuating an electric actuator, when the unlocking signal is output from the means 31. The system is constructed in such a manner that the lock driving means is set in normally locked specifications. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a take-away prevention system that is preferably used in an office or the like to improve security.

  Recently, in various organization operations, information leakage has emerged as a major problem, and improvement of security measures has become an important issue in order to improve the reliability of the organization.

  On the other hand, the diversification of members in the offices in the organization, etc. is rapidly progressing recently. In addition to the main workers such as so-called full-time employees and contract workers, sub-workers such as temporary employees, arbiters, external maintenance contractors, etc. An environment where people can act freely is established. And it is in a situation where a person who does not have any authority using such an environment cannot ignore the possibility of intrusion from the outside.

In such an environment, as a measure to protect the protection object such as a medium storing important information and confidential documents, in addition to the traditional measure of locking the wagon drawer and storage door, A system having a personal authentication function using a weak wireless communication method has been developed. As an example, a worker who can work in an office lends a name tag or the like equipped with an active type RFID tag (hereinafter referred to as an “ID tag”) as an authentication key element, and each worker has its own characteristic. In addition to making it possible to work while sending an identification signal, a worker who owns an ID tag by wirelessly communicating with an ID tag approaching within a certain range in a wagon or storage that houses the object to be protected A device provided with an authentication means for authenticating whether or not the user has the authority to access the storage is known. Thus, this device is configured to output an unlock signal when it is determined that the signal from the ID tag includes the unlocking authority, and based on the unlock signal, The doors of the storage can be unlocked (see the following patent document).
Japanese Patent Publication No. 07-015229

  In the above-described conventional system, as in the case of the conventional mechanical locking, it is essential for the user to consciously perform the operation of locking the wagon drawer, etc., and the worker who works while standing frequently Is forced to perform the lock operation many times. For this reason, it is often troublesome that the lock operation is not performed or the lock operation is often forgotten, and it is difficult to substantially improve the security.

  Further, in the conventional system, ID tags possessed by a plurality of workers each continuously transmit identification signals intermittently or intermittently. Even in the case of weak radio waves, the situation where electromagnetic waves frequently propagate in a limited space area may cause electromagnetic interference such as interference with the normal operation of other equipment and devices, which is not preferable. .

  In addition, in such a system, both the ID tag and the device on the side that performs authentication by communicating with the ID tag must be constantly activated. According to such a configuration, the authentication means mounted on the wagon outputs a lock release signal only by a worker having the authority to release the lock passing the vicinity of the wagon or the like. It can happen that it is activated. For this reason, there is a problem that it is not possible to sufficiently satisfy the desire to reduce power consumption, and there is also a possibility that a person other than the specific person illegally takes out the protection target.

  The present invention, which has been made in view of the above problems, aims to realize a more suitable system by reducing the power saving and “wireless saving”, that is, the opportunity of wireless communication, without deteriorating usability.

  In order to solve the above-described problems, a wireless authentication key element to be held by each specific person having the ability to take away the object to be protected, a lock mechanism that locks the object to be removed, and the specific person or It is detected whether or not a person other than the specific person performs an active action for using or taking away the object to be protected using one or more action detection sensors, and a detection result indicating that the active action has been performed is obtained. A trigger operation detecting means for outputting at least an authentication start signal when obtained, and a communication operation by a wireless method is executed for the authentication key element when an authentication start signal is output from the trigger operation detecting means. Authentication / control means for outputting an unlock signal on the condition that the signal from the key element for use is recognized as including the unlocking authority, and this authentication / control And a lock driving means for operating the electric actuator to switch the lock mechanism to a state in which the lock can be automatically or passively released when a lock release signal is output from the operating means. A take-away prevention system with a normally-locked locking mechanism was constructed.

  Here, the object to be protected is various items stored in a drawer, storage, etc., confidential documents and recording media stored in a room such as a library or server room, a server computer, etc. This is a concept encompassing others such as personal computers. The specific person means a person who has the authority to take out the protected object, and the person other than the specific person means a person who does not have the authority to take out the protected object. The person other than the specific person includes not only an outside intruder but also an acquaintance of the specific person, a friend, and the like. The signal output generally means that the processing / operation required next is caused by the signal, and is not limited to sending a predetermined current signal or electromagnetic wave signal. This also includes inducing the next necessary processing / operation by changing the signal or the like or stopping the transmission. Normally-locked means that it is locked except when the specific person releases the lock based on the positive action performed by his / her own intention.

  According to the carry-out prevention system according to the present invention, at least the lock driving means has a normally-locked specification, so that it is not necessary for the specific person to perform the lock operation consciously, and security is not compelled. Improvements can be made. Also, a trigger action detection means is provided so that the authentication / control means communicates with the authentication key element and starts authentication only when a specific person or a person other than the specific person performs a certain positive action. Therefore, when the active operation is not performed, it is possible to set the authentication / control unit and the authentication key element to a sleep state in which only standby power is consumed. In addition, in such a case, the lock release signal is not output only when the specific person having the unlocking authority approaches, so that the malfunction that causes the actuator to operate improperly does not occur. And while avoiding the situation where electromagnetic waves fly wastefully, there exists an effect that electric power consumption can be suppressed as much as possible.

  The application object of this invention is various. The lock mechanism locks, for example, a drawer that houses a protection object to a housing that supports the drawer so as to be slidable. The casing is an outer casing of a wagon that houses the drawer, a sleeve structure in a sleeve desk, or the like.

  Further, the locking mechanism may be for locking the opening / closing body to a main body that supports the opening / closing body so as to be capable of opening / closing. In this case, a door, a lid, a door, or the like that closes a main body such as a storage or a safe for storing the object to be protected corresponds to the opening / closing body. In addition, if you think of a room such as a library or server room where documents, server computers, disk storage devices, etc. to be protected are placed as the `` main body '' here, doors and gates that close the entrance of this room will be `` Opening and closing body ". Further, when a notebook computer is used as a protection object, a display unit (a display unit is a lid that shields a keyboard and the like on the main unit) attached to the “main unit” of the notebook computer via a hinge. It can also be considered to be “opening / closing body”.

  Alternatively, the locking mechanism may be for locking the object to be protected to the anchoring member. For example, a wire for anchoring a notebook personal computer or the like corresponds to the anchoring member.

  The most basic aspect of the trigger motion detection means uses a manual operation switch operated by a specific person or a person other than the specific person as a motion detection sensor.

  As another mode of the trigger motion detection means, a switch that is switched when an attempt is made to operate the drawer or the handle of the opening / closing body may be considered as the motion detection sensor. If this is the case, the natural action to take out the protected object stored, that is, the action of pulling out the drawer from the housing or the action of opening the opening / closing body will be used to authenticate the unlocking authority. Directly linked to the active action to be initiated. Therefore, it becomes a very easy-to-use system that matches the consciousness and work of a specific person.

  By the way, if the trigger motion detection means detects a positive motion using only a manual operation switch, a single positive motion by a specific person will always cause the unlocking. If an unlocking type electric lock is used for the locking mechanism, energy is consumed during the unlocking control. If you do not open your body, or if you happen to operate the manual operation switch, you will lose energy. On the other hand, if the trigger operation means uses only a switch that is switched in response to an operation on the handle of the drawer or the opening / closing body, the unlocking authority is authenticated after the handle is operated by a specific person and the lock is released. The time allowed to spend is limited to a short time. This is because the fact that “the handle is pulled but does not open” makes a particular person feel stress. However, in order to reduce energy consumption as much as possible, the circuit configuration of the processor and other elements mounted on the authentication / control means must be simplified, and the drive frequency must be kept low. That is, the processing time required for authentication of the unlocking authority and the like becomes long, and therefore a time lag is inevitably generated until the lock is released after the specific person pulls the handle. As a method for solving these disadvantages, the trigger motion detection means outputs an authentication start signal when the detection result indicating that the positive motion has been performed based on the first motion detection sensor is obtained, and the second motion It is configured to output a lock release permission signal when a detection result indicating that a positive action has been performed based on the detection sensor is obtained, and the authentication start signal is output from the trigger operation detection means to the authentication / control means. When the communication operation is performed for the authentication key element and it is determined that the signal from the authentication key element includes the unlocking authority, the authentication result is stored, and the trigger operation detection is performed. It can be considered that when the lock release permission signal is output from the means, the lock release signal is output based on the stored contents. At this time, the manual operation switch is used as the first motion detection sensor, and the switch that is switched when the specific person touches the part that must be touched to use or remove the protection object is referred to as the second motion detection sensor. It is preferable to do.

  Specifically, the correlation between the lock driving means and the lock mechanism is described. The lock drive means is configured to operate the electric actuator between a lock position and an unlock position, and The mechanism is configured to be in a locked state or a lockable state when the electric actuator is moved to the lock position, and to be unlocked when the electric actuator is moved to the unlock position.

  The lock driving means is configured to operate the electric actuator between a locked position and an unlocked position, and the lock mechanism is closed when the drawer is housed in a casing. When the robot moves to the lock position, it immediately enters the locked state in which the drawer is locked.When the electric actuator moves to the lock position with the drawer being pulled out of the housing, the drawer is operated to close the drawer. If it is configured to be in a lockable state capable of shifting to the locked state, it is suitable for application to a drawer such as a wagon or a sleeve desk. Further, it is not necessary to limit the operation of the electric actuator for driving the electric actuator according to the current position of the drawer, and the electric circuit for driving and controlling the electric actuator can be simplified.

  The lock driving means is configured to operate the electric actuator between a lock position and an unlock position, and the lock mechanism is provided between the lock claw protruding position and the lock claw immersing position provided on the housing. And a plurality of lock claws that are respectively provided on the lock claw support body so as to correspond to each of the drawers and engage with the corresponding drawers at the protruding position of the lock claw and respectively lock the drawers. And a plurality of drawers can be simultaneously unlocked and unlocked by a single mechanism if the lock claw support can be operated by the elastic biasing force of the elastic member and the driving force of the electric actuator. Is possible.

  At this time, the elastic member elastically urges the lock claw support in the lock claw protruding position direction, and the electric claw support is provided when the electric actuator is moved from the lock position to the unlock position direction. If the body is driven in the direction of the lock claw immersing position against the elastic biasing force, a normally-lock can be easily realized without any special contrivance in the lock driving means. However, the elastic member is configured to elastically bias the lock claw support in the lock claw insertion position direction, and the lock claw support is moved when the electric actuator is moved from the unlock position to the lock position. Is prevented from being driven in the direction of the locking claw protruding position against the elastic biasing force.

  Alternatively, the lock driving means is configured to operate the electric actuator between the lock position and the unlock position, and the lock mechanism is for locking the drawer to the housing, A main lock body for locking the movement of the main lock body and a sub-block body for prohibiting or allowing the movement of the main lock body without synchronizing with the movement of the main lock body, and the operation of the electric actuator If the sub-lock body is driven by this, it is possible to prevent or suppress a large load acting on the main lock body from being transmitted to the electric actuator, etc., and to reduce the possibility of failure. A body, an electric actuator, etc. can be reduced in size.

  According to the present invention, power saving and wireless saving can be realized without deteriorating usability, and a more suitable take-away prevention system can be achieved.

  <First Embodiment> An embodiment of the present invention will be described below with reference to the drawings. The take-away prevention system of the present embodiment includes a lock mechanism that suppresses the opening / closing operation of the drawer 1 on a furniture W such as a wagon or a sleeve desk equipped with the drawer 1 that can store a protection object, and locks the lock mechanism. / Unlock is controlled through user authentication.

  The furniture W such as a wagon or a sleeve desk accommodates and holds the one-stage or multiple-stage drawers 1 in a housing 2 (in the case of a sleeve desk, it is a structure constituted by a sleeve). As shown in FIG. 1, the drawer 1 has a back plate 12 attached to a front end portion of a body plate 11 that forms a storage space that opens upward, and an end plate 13 is assembled to the back plate 12 from the front. A protrusion 14 extending in the front-rear direction is provided on the outer surface of the body plate 11, and the protrusion 14 is slidably supported on a rail 22 (which may be a suspension rail) attached in the housing 2. Let

  As shown in FIG. 2, the housing 2 is formed by connecting left and right side walls 21 with a rear wall (not shown) and an upper horizontal member 22, and an internal space that houses the drawer 1 is connected to the front. Yes. The side wall 21 is formed by fixing an inner plate 212 forming an inner side surface and a rearward surface to a front edge portion of an outer plate 211 forming an outer side surface and a front end surface of the side wall 21 by welding or the like. The front reinforcing surface 213 that reinforces rigidity is formed by the front end surface, the inner surface, and the rear surface, and has a flat space region that extends in the vertical direction.

  The lock mechanism for locking the drawer 1 mainly includes the lock claw support 24 arranged in the space area and the lock claw 241 supported by the lock claw support 24. The lock claw support 24 is a plate-like body that is long in the vertical direction, and is produced by, for example, pressing a sheet metal material. The lock claw support 24 has shaft portions 242 that are integrally formed at both upper and lower ends, and these shaft portions 242 are supported by bearings 251 and 252 so as to be horizontally rotatable. The bearing body 251 that supports the shaft portion 242 at the lower end of the lock claw support 24 is a tongue-shaped member that is cut and raised from the inner plate 212 of the side wall 21 to the space region in the front reinforcing portion 213 and has a substantially heart shape in plan view. A shaft hole is formed. The bearing body 252 that supports the shaft portion 242 at the upper end is, for example, a resin molded product, and also has a shaft hole that accommodates the shaft portion 242. Mounting of the bearing body 252 to the housing 2 is performed by press-fitting a part of the bearing body 252 into a notch formed in the upper edge of the inner plate 212 or the upper horizontal member 22.

  A number of lock claws 241 corresponding to the number of stages of the drawer 1 are provided at the rear edge of the lock claw support 24. These lock claws 241 are cut and raised from the lock claw support 24 and project substantially horizontally toward the inside. The lock claw 241 includes a rear end edge substantially orthogonal to the vertical surface of the lock claw support 24 in plan view, and a tapered side end edge inclined slightly forward from a direction parallel to the vertical surface of the lock claw support 24. However, it has a substantially right triangle shape. Further, at positions corresponding to the lock claws 241 on the inner plate 212 of the side wall 21, a claw protrusion / recess opening 214 through which the lock claws 241 can pass is formed.

  The lock claw support 24 is urged by the elastic member 26 in a direction in which each lock claw 241 protrudes from the inner plate 212 of the side wall 21 through the claw protrusion / recess opening 214. In the illustrated example, a torsion coil spring 26 as an elastic member is wound around the shaft portion 242 of the lock claw support 24 and one end thereof is supported by the outer plate 211 of the side wall 21 while the other end is external to the lock claw support 24. It is assumed to be in contact with the side surface.

  The lock claw 241 that projects through the claw projecting opening 214 can lock the drawer 1 at each stage. As shown in FIG. 1, the protrusion 14 or the trunk plate 11 of the drawer 1 is formed with an engagement hole 15 facing the claw protrusion / submerged opening 214 in advance, or with an engagement protrusion 16 protruding therefrom. . The rear end edge of the lock claw 241 that protrudes inward from the claw protrusion / recess opening 214 engages with the opening edge of the engagement hole 15 or the front end edge of the engagement protrusion 16 to slide the drawer 1 forward. To prevent.

  Due to the elastic biasing by the elastic member 26, the lock claw 241 protrudes from the claw protrusion / contraction opening 214 during normal times. Therefore, in order to release the lock on the drawer 1, it is necessary to displace the lock claw support 24 against the elastic biasing force by some method and to immerse the lock claw 241 into the side wall 21. In the present embodiment, in principle, the lock claw support 24 is displaced through the movement of the electric actuator 27. As shown in FIGS. 3A, 3B, and 4, the electric actuator 27 has a substantially wedge shape in plan view, and the unlock position P2 and the lock position are within the space region formed in the front reinforcing portion 213 of the housing 2. Move forward / backward with P1. When the electric actuator 27 is in the lock position P1 shown in FIGS. 3A, 3B, and 5, the electric actuator 27 does not engage with the lock claw support 24, and the lock claw support 24 pushes the lock claw 241 into the claw. It is positioned at a lock claw protruding position P3 that protrudes from the immersion port 214. When the electric actuator 27 moves forward and moves to the unlock position P2 shown in FIGS. 4 and 6, the outer side surface of the electric actuator 27 engages with the rear end portion of the lock claw support 24, and the rear end portion thereof. Turns outward and the lock pawl support 24 is displaced to the lock pawl immersing position P4. As a result, the lock claw 241 is immersed in the side wall 21 and the lock on the drawer 1 is released.

  The electric actuator 27 is operated by lock driving means. The lock driving means includes an electric actuator 28 that outputs an operating force that operates the electric actuator 27, and a transmission mechanism 29 that transmits the operating force output by the electric actuator 28 to the electric actuator 27. The electric actuator 28 may receive power from an external power supply outlet, or may receive power from a battery (regardless of the type). In the present embodiment, the electric actuator 28 includes a solenoid 281 that moves the plunger 282 forward and backward and an elastic member 283 that pulls and urges the plunger 282 forward. In the illustrated example, the front end of the coil spring 283 is fixed to the housing 2, and the rear end is attached to the plunger 282 to apply a tensile force to the plunger 282. The transmission mechanism 29 includes an operation rod 291 that connects the front end to the electric actuator 27 and extends in the front-rear direction, and a balance member 292 that connects the operation rod 291 and the plunger 282 of the solenoid 281. The balance member 292 has one end connected to the operating rod 291 and the other end connected to the plunger 282 via hinges 293 and 294, respectively. Further, an intermediate portion of the balance member 292 is pivotally supported on the housing 2 via a horizontal support shaft 295. The balance member 292 can pivot vertically about the horizontal support shaft 295.

  When the solenoid 281 is not energized, the plunger 282 is pulled forward by the coil spring 283, the other end of the balance member 292 is positioned forward, and the other end is positioned rearward so that the operating rod 291 and the electric motor 291 are electrically operated. Pull the actuator 27 backward. Therefore, the electric actuator 27 moves backward to the lock position P1. When the solenoid 281 is energized, the plunger 282 is attracted by the solenoid 281 and retracts backward, and the other end of the balance member 292 rotates rearward and one end rotates forward to move the operating rod 291 and the electric actuator 27. Press forward. Therefore, the electric actuator 27 moves forward to the unlock position P2. That is, the lock claw 241 can be immersed in the side wall 21 by energizing the solenoid 281, and the lock claw 241 can be protruded from the side wall 21 by interrupting the energization of the solenoid 281.

  In order to achieve the purpose of protecting the object to be protected stored in the drawer 1 from a person other than a specific person having a legitimate authority, the electric actuator 27 is operated and locked only when the specific person is successfully authenticated. Can be canceled. The drive / control means is responsible for user authentication and control of the electric actuator 28. In this system, user authentication is performed by the authentication determination module 31, and control of the electric actuator 28 is performed by the control module 32. The authentication determination module 31 and the control module 32 may be supplied with electric power from an external power supply outlet or may be supplied with electric power from a battery, but normally the electric actuator 28 and the electric power supply source are the same.

  The authentication determination module 31 performs user authentication by wireless communication with the authentication key element 4 provided to each user in advance. For example, as shown in FIG. 7, the authentication determination module 31 includes a processor unit 311 including a processor, a main memory, a flash memory (nonvolatile memory), and / or a ROM (Read Only Memory), an antenna, an amplifier, and a demodulator. A weak wireless communication unit 312 having a circuit, a modulation circuit, and the like. A program to be executed by the processor is stored in the flash memory or ROM, and is read into the main memory and decoded by the processor at the time of execution. The authentication determination module 31 operates hardware resources according to the program and performs processing necessary for user authentication. The authentication determination module 31 outputs a signal indicating that to the control module 32 when authentication of a specific person having the right to take away the protection target is successful.

  The authentication determination module 31 and the control module 32 are electrically connected, and the control module 32 can receive a signal transmitted from the authentication determination module 31. The actuator control circuit mounted on the control module 32 outputs a lock release signal for releasing the lock by the lock mechanism when receiving a signal indicating that the identification person has been successfully authenticated from the authentication determination module 31. In the present embodiment, the lock release signal is an electric signal that is applied to the solenoid 281 to retract the plunger 282.

  In the present embodiment, the authentication / control means (the authentication determination module 31) restricts the opportunity of wireless communication with the authentication key element 4. Specifically, the wireless communication is started only when it is detected that a specific person or a person other than the specific person has used the object to be protected or has taken an active action to take it away. The trigger action detection means detects the positive action by the specific person or a person other than the specific person. The trigger motion detection means detects an active motion using at least one motion detection sensor 33, and outputs an authentication start signal when a detection result indicating that the active motion has been performed is obtained. In order to realize power saving, it is desirable to employ a switch or the like that does not consume standby power as the motion detection sensor. In the present embodiment, a manual operation switch 33 typified by a push button is provided as an operation detection sensor so as to be exposed on the housing 2 or the drawer 1 of the furniture W. A person who releases the lock of the drawer 1 and wants to operate the drawer 1 operates the manual operation switch 33 as an active action. The manual operation switch 33 that has detected the positive action outputs a predetermined pulse signal indicating that. This pulse signal becomes an authentication start signal.

  The manual operation switch 33 that is an operation detection sensor and the authentication determination module 31 are electrically connected, and the authentication determination module 31 can receive a pulse signal that is an authentication start signal transmitted from the manual operation switch 33. The authentication determination module 31 starts executing a program routine for performing wireless communication and authentication with the authentication key element 4 when receiving an authentication start signal output from the manual operation switch 33 according to the program.

  On the other hand, as shown in FIG. 8, each specific person who has the right to take away the object to be protected, in other words, the right to open / close the drawer 1, has an authentication key element 4. The authentication key element 4 serves as a key for unlocking the drawer 1. For example, as shown in FIG. 9, the authentication key element 4 includes a processor unit 41 including a processor, a main memory, a flash memory and / or a ROM, an antenna, an amplifier, a demodulation circuit, a modulation circuit, and the like. The weak wireless communication unit 42 is provided. This authentication key element 4 is driven by receiving power supply from a battery (regardless of its type). The outer shape of the authentication key element 4 is not particularly limited. The authentication key element 4 is not limited to a tag shape or a card shape, and may have a shape larger than these (for example, a folder, a file, etc.), or a shape smaller than these (for example, a clip or a ring). , Staples, chips, etc.). A program to be executed by the processor is stored in the flash memory or ROM, and is read into the main memory and decoded by the processor at the time of execution. The authentication key element 4 operates hardware resources according to the program and communicates with the authentication determination module 31 on the furniture W side by radio.

  Hereinafter, user authentication will be described. An authentication identifier is assigned in advance to each authentication key element 4 possessed by each specific person. The authentication identifier identifies a specific person or a group including a plurality of persons, and has a predetermined length (for example, 4 bytes) for each person or each group. The flash memory or ROM mounted on the authentication key element 4 stores an authentication identifier assigned to the authentication key element 4.

  On the other hand, an authentication identifier to be authenticated is stored in the flash memory or ROM mounted on the authentication determination module 31 on the furniture W side. The authentication identifier to be authenticated is an authentication identifier related to a specific person or a group of specific persons who have the right to open and close the drawer 1 and take out the object to be protected.

  The user authentication procedure is shown in the flowcharts of FIGS. FIG. 10 shows a processing procedure executed by the authentication judgment module 31 on the furniture W side, and FIG. 11 shows a processing procedure executed by the authentication key element 4 possessed by the specific person. As already described, the authentication determination module 31 on the furniture W side detects an active action by a specific person or a person other than the specific person via the manual operation switch 33 that is an operation detection sensor. The authentication determination module 31 that has detected the positive action by receiving the authentication start signal output from the manual operation switch 33 receives a request signal including a part of the authentication identifier (for example, the second half 2 bytes) to be authenticated as an authentication key element. 4 is transmitted wirelessly (step S1).

  Upon receiving the request signal (step S5), the authentication key element 4 determines whether or not a part of the authentication identifier included in the request signal is inherent in the authentication identifier assigned to itself (step S6). If it exists, a response signal including the remaining part (for example, the first two bytes) of the authentication identifier assigned to itself is sent back to the authentication judgment module 31 by radio (step S7). If it does not exist, no response signal is returned.

  The authentication determination module 31 that has transmitted the request signal waits for a response signal provided from the authentication key element 4. When the response signal is received (step S2), it is determined whether or not the remaining part of the authentication identifier included in the response signal corresponds to the authentication identifier to be authenticated (step S3). If the authentication is successful, control for releasing the lock is executed. Specifically, the control module 32 is caused to output a lock release signal (step S4). That is, it can be said that the response signal including the remaining portion of the authentication identifier to be authenticated is a signal including the unlocking authority. If the response signal by the authentication key element 4 to which the authentication identifier to be authenticated is assigned within a predetermined time limit after the request signal is transmitted, the authentication is not successful, that is, the right authority The control module 32 is not allowed to output a lock release signal because there is no specific person in the vicinity.

  An example of user authentication is shown in FIG. In the illustrated example, an authentication identifier “00 11 22 22” relating to a user or group having a legitimate authority is stored in the authentication determination module 31 and also stored in the authentication key element 4 (4K) possessed by the user. Has been. At the start of user authentication, the authentication determination module 31 transmits a request signal including the latter two bytes “22 22” as a part of the authentication identifier to be authenticated.

  Each of the authentication key elements 4 (4J, 4K, 4L, 4M, 4N) in a position where wireless communication with the authentication determination module 31 can receive the request signal and determine whether or not a response signal should be returned. That is, in each authentication key element 4J, 4K, 4L, 4M, 4N, it is determined whether or not the latter 2 bytes of the authentication identifier stored in itself matches the latter 2 bytes of the authentication identifier included in the request signal. to decide. Of these authentication key elements 4, the authentication key elements 4K and 4N return a response signal. The authentication key element 4K returns a response signal including the first two bytes “00 11”, which is the remaining part of the authentication identifier assigned to itself, and the authentication key element 4N returns the authentication identifier assigned to itself. A response signal including the first two bytes “33 44” is returned. The other authentication key elements 4J, 4L, and 4M do not return a response signal.

  Accordingly, the authentication determination module 31 receives the response signals returned from the authentication key elements 4K and 4N, respectively, and makes a final authentication determination. In this example, the first two bytes of the authentication identifier included in the response signal provided from the authentication key element 4K match the first two bytes of the authentication identifier “00 11 22 22” to be authenticated. Therefore, it is determined that there is a specific person having a legitimate authority in the vicinity, and the unlocking of the drawer 1 can be permitted.

  As is clear from the above example, a plurality of authentication key elements 4 may respond to the request signal transmitted by the authentication determination module 31. Therefore, it is preferable that the authentication key element 4 generates a random number and determines a wait time based on the random number in step S7, and returns a response signal after the determined wait time has elapsed. As a result, even if there are a plurality of authentication key elements 4 that return response signals in response to the request signal, the response timing of response signals can be shifted from each other.

  When the user authentication is successful, a signal indicating that is input from the authentication determination module 31 to the control module 32. Upon receiving this signal input, the control module 32 outputs a lock release signal, that is, energizes the solenoid 281 of the electric actuator 28 to operate it, and advances the electric actuator 27 to the unlock position P2. At this time, the time for the control module 32 to output the lock release signal, that is, the time for energizing the solenoid 281 is limited to a predetermined period (for example, several seconds). That is, after a positive action by a specific person, the period during which the lock claw 241 is immersed through user authentication is limited, and after the period, the electric actuator 27 is retracted to the lock position P1 and the lock claw 241 protrudes again. I am doing so.

  When the electric actuator 27 moves to the unlock position P <b> 2, the lock claw 241 is immersed in the side wall 21 of the housing 2 and unlocks the drawer 1. In turn, when the electric actuator 27 moves to the lock position P1, the lock claw 241 protrudes from the side wall 21 and enters a locked state in which the drawer 1 is locked, or a lockable state in which it can shift to the locked state. That is, when the electric actuator 27 moves to the lock position P1 when the drawer 1 is housed in the housing 2 and closed, the lock claw 241 immediately engages with the engagement hole 15 or the engagement protrusion 16 of the drawer 1. The drawer 1 is locked together, but when the electric actuator 27 moves to the lock position P1 when the drawer 1 is pulled out from the inside of the housing 2, the lock claw 241 is pulled out from the drawer 1 Is not immediately locked. However, if the electric actuator 27 is in the lock position P1, when the drawer 1 is pushed into the housing 2 and closed, the lock claw 241 is driven by the sliding movement of the drawer 1 (that is, once in the side wall 21). And then re-projects) to engage the engagement hole 15 or the engagement protrusion 16 and lock it.

  Incidentally, it is desirable to be able to mechanically release the lock by the lock mechanism in the event of a power failure, battery exhaustion, or other trouble in the electrical system. For example, as shown in FIG. 3B, a lock 17 capable of moving the manual actuator 171 forward and backward by inserting and operating a key is provided, and the lock claw support 24 is locked by the manual actuator 171. It is configured to be able to rotate to the nail immersion position P4. The manual actuator 171 advances outward by operating the lock 17 using a key, and drives the lock claw support 24 directly or indirectly through another member. In the illustrated example, the lock claw support 24 is indirectly driven through an indirect drive member 215 supported on an inner plate 212 of the housing 2 so as to be swingable around a vertical axis. The side wall 21 has a through hole 216 through which at least a part of the manual operation member 171 or the indirect drive member 215 is inserted in advance, and the manual operation member 171 or the indirect drive member 215 has a lock claw support through the through hole 216. Push 24 outward. Since the lock claw support 24 pushed by the manual actuator 171 or the indirect drive member 215 moves to the lock claw immersing position P4, the lock claw 241 is inserted into the side wall 21 through the operation of the lock 17 to manually release the lock. Is possible.

  According to the present embodiment, the wireless key authentication key element 4 that each specific person possessing the ability to take away the object to be protected, the lock mechanism that locks the object to be removed, and the specific person or At least when a person other than the specific person detects whether or not to perform an active action for using or taking away the object to be protected using an action detection sensor and obtains a detection result indicating that the active action has been performed. A trigger operation detecting means for outputting an authentication start signal, and when an authentication start signal is outputted from the trigger operation detecting means, a communication operation by a wireless system is executed for the authentication key element 4 to perform the authentication key element 4 The authentication / control means for outputting the unlock signal on the condition that the signal from the terminal has been recognized as including the unlocking authority, and the lock from the authentication / control means. Lock driving means for operating the electric actuator to switch the lock mechanism to a state in which the lock can be automatically or passively released when a release signal is output, at least for the lock drive Since the removal prevention system in which the means is set to the normally lock specification is constructed, it is not necessary for the specific person to perform the lock operation consciously, and the security can be improved without complicating a complicated procedure. Also, the authentication / control means communicates with the authentication key element 4 and starts authentication only when a specific person or a person other than the specific person performs a certain positive action. Makes it possible to put these authentication / control means and authentication key element 4 in a sleep state in which only standby power is consumed. In addition, in such a case, the lock release signal is not output only when the specific person having the unlocking authority approaches, so that the malfunction that causes the actuator to operate improperly does not occur. And while avoiding the situation where electromagnetic waves fly wastefully, there exists an effect that electric power consumption can be suppressed as much as possible.

  The system of this embodiment can protect a protection target object appropriately by locking the drawer 1 which accommodates a protection target object to the housing which supports the said drawer 1 so that a slide is possible.

  The trigger motion detection means uses a manual operation switch 33 that is operated by a finger of a specific person or a person other than the specific person as an operation detection sensor, and can easily and reliably detect an active action based on the intention of the specific person. .

  The lock driving means is configured to operate the electric actuator 27 between the lock position P1 and the unlock position P2. The lock mechanism moves the electric actuator 27 to the lock position P1. When the electric actuator 27 is moved to the unlock position P2, the unlocked state is established.

  The lock driving means is configured to operate the electric actuator 27 between the lock position P1 and the unlock position P2, and the lock mechanism is closed when the drawer 1 is housed in the housing 2. When the electric actuator 27 is moved to the lock position P1 in this state, the drawer 1 is immediately locked, and the electric actuator 27 is in the lock position P1 while the drawer 1 is pulled out from the housing 2. When it is moved to the position, it is configured to be in a lockable state that can be moved to the locked state by following the operation of closing the drawer 1 and is suitable for application to the drawer 1 such as a wagon or a sleeve desk. Yes. Further, it is not necessary to limit the operation of the electric actuator 28 that drives the electric actuator 27 according to the current position of the drawer 1, and the electric circuit (control module 32) that controls the driving of the electric actuator 28 can be simplified. it can.

  The lock driving means is configured to operate the electric actuator 27 between the lock position P1 and the unlock position P2, and the lock mechanism is provided on the housing 2 and the lock claw protruding position P3 and the lock claw. A lock claw support 24 operable between the immersion position P4 and a lock claw support 24 provided on the lock claw support 24 corresponding to each of the drawers 1 and engaged with a corresponding drawer 1 at the lock claw protruding position P3. A plurality of lock claws 241 for locking the drawer 1 are provided, and the lock claw support 24 can be operated by the elastic biasing force of the elastic member 26 and the driving force of the electric actuator 27. Therefore, it is possible to simultaneously lock and unlock a plurality of drawers 1 with a single mechanism.

  The elastic member 26 elastically biases the lock claw support 24 in the lock claw protruding position P3 direction, and the electric actuator 27 is moved when the electric actuator 27 is moved from the lock position P1 to the unlock position P2. Since the lock claw support 24 is driven in the direction of the lock claw immersing position P4 against the elastic urging force, a normally locked state can be easily realized without any special contrivance in the lock driving means. Moreover, in the furniture W in this embodiment, the lock claw 241 and the lock claw support 241 for locking each drawer 1 are always urged in the direction of the lock claw protruding position P3 and the drawer 1 is not energized unless the solenoid 281 is energized. Is pushed into the case 2 and closed whenever it is closed. Even if the electrical system, that is, the electric actuator 27, the electric actuator 28, the transmission mechanism 29, the authentication judgment module 31, and the control module 32 are removed from the furniture W, the auto-lock furniture that can be unlocked using a key. It can be established as W.

  <Second Embodiment> This embodiment is a modification of the motion detection sensor according to the first embodiment. Hereinafter, description will be made with emphasis on elements different from the first embodiment. Since the lock mechanism, the electric actuator 27, the electric actuator 28 and the transmission mechanism 29, the authentication determination module 31, the control module 32, and the authentication key element 4 can be configured in the same manner as in the first embodiment, they are detailed. Description is omitted.

  In the first embodiment, the manual operation switch 33 that is operated by a specific person or a person other than the specific person is provided as the operation detection means. However, in general, it is the handle 18 of the drawer 1 that is gripped when the drawer 1 is to be pulled out of the housing 2. In the case where the manual operation switch 33 is provided separately from the handle 18, the specific person who opens and closes the drawer 1 must hold the handle 18 after operating the manual operation switch 33, and the operation is slightly performed. It cannot be denied that this becomes complicated. Therefore, in place of the manual operation switch 33, the furniture W is mounted with a switch 34 that must be touched to open and close the drawer 1, that is, the switch 34 that is switched when the handle 18 is to be operated. If it can be set as a sensor, it will become more preferable.

  The handle 18 of the drawer 1 is usually provided on the end plate 13 of the drawer 1. As shown in FIGS. 1, 13, and 14, the end plate 13 includes a face plate portion 131 having a recess 132 in which the handle 18 is disposed, an upper end portion 133 bent rearward from the upper edge of the face plate portion 131, and a face plate portion. For example, a resin molded product having a substantially square basin shape including a lower end portion 134 bent rearward from the lower edge of 131 and a side end portion 135 bent rearward from the side edge of the face plate portion 131. The handle 18 is for operating a latch 136 for mooring the drawer 1 to the housing 2. Both ends of the rotation shaft of the handle 18 are supported so as to be rotatable while being guided through the recess 132 to the back side of the face plate portion 131. The latch 136 is pivotally supported by a pivoting portion 137 provided on the inner surface side of the side end portion of the end plate 13 so as to be pivotable horizontally, and a distal end thereof is provided on the side edge of the back plate 12 of the drawer 1. 121, the drawer 1 is hung on a latch receiver 217 provided in advance on the inner side surface of the side wall of the casing 2 when the drawer 1 is pushed into the casing 2. Moored on body 2. When the handle 18 is turned, the latch 136 rotates following the handle 18 and the engagement between the latch 136 and the latch receiver 217 is released. A specific person who wants to pull out the drawer 1 grips and rotates the handle 18 to drive the latch 136 to detach it from the latch receiver 217, and then slides the drawer 1 forward of the hand.

  Thus, in the present embodiment, a switch 34 that detects that the latch 136 of the drawer 1 is driven is mounted in the vicinity of the latch receiver 217 provided on the side wall of the housing 2. The switch is, for example, a mechanical switch 34 that is turned on when engaged with a latch 136 that is engaged with the latch receiver 217 and that is turned off when the latch 136 is detached from the latch receiver 217. The mechanical switch 34 can detect that a specific person or a person other than the specific person has operated the handle 18. In other words, the mechanical switch 34 may be an operation detection sensor that can detect an active operation in which several persons grasp the handle 18 and pull out the drawer 1. The mechanical switch 34 that has detected the positive action outputs a predetermined pulse signal indicating that. As in the first embodiment, this pulse signal becomes an authentication start signal. However, a magnet sensor or the like that detects whether the latch 136 is hooked on the latch receiver 217 or detached from the latch receiver 217 may be mounted and used as an operation detection sensor. Alternatively, it is conceivable that a sensor (for example, an infrared sensor, an ultrasonic sensor, or the like) that can detect that a finger has approached the vicinity of the handle 18 is employed as the motion detection sensor.

  As shown in FIG. 15, the mechanical switch 34 or the magnet sensor, which is an operation detection sensor, and the authentication determination module 31 are electrically connected, and the authentication determination module 31 is sent from the mechanical switch 34 or the magnet sensor or the like. A pulse signal as an authentication start signal can be received. When the authentication determination module 31 receives an authentication start signal output from the mechanical switch 34 or the magnet sensor or the like according to the program, the authentication determination module 31 learns that an active operation has been performed and performs wireless communication with the authentication key element 4 and Starts execution of a program routine that performs authentication. Thus, when the specific person is successfully authenticated, a signal indicating the fact is sent to the control module 32, and the control module 32 is made to output a lock release signal.

  According to the present embodiment, the trigger motion detection means uses the switch 34 that is switched when the handle 18 is to be operated as the motion detection sensor, so that the protection object stored in the drawer 1 is taken out. That is, the action of trying to pull out the drawer 1 from the housing 2 directly leads to the positive action for starting the authentication of the unlocking authority. Therefore, it becomes a very convenient system that matches the consciousness and work of a specific person.

  In addition to the above, it goes without saying that the effects described in the first embodiment can also be achieved.

  <Third Embodiment> In the first embodiment, the manual operation switch 33 is an operation detection sensor, and in the second embodiment, the mechanical switch 34 is an operation detection sensor. In the first and second embodiments, a positive action by a specific person or a person other than the specific person is detected by one action detection sensor. In this embodiment to be described subsequently, a plurality of motion detection sensors are used to detect a positive motion step by step. Hereinafter, description will be given with emphasis on elements different from the first and second embodiments. The lock mechanism, the electric actuator 27, the electric actuator 28 and the transmission mechanism 29, the authentication determination module 31, the control module 32, and the authentication key element 4 can be the same as those in the first and second embodiments. Therefore, detailed explanation is omitted.

  In the second embodiment, a switch 34 that is switched when a specific person or a person other than the specific person tries to operate the handle 18 is provided, and the authentication determination module 31 wirelessly communicates with the authentication key element 4 when the switch is switched. Communication was started and user authentication was performed. The problem in that case is that the time allowed for user authentication is short. That is, if the drawer 1 cannot be pulled out even though the handle 18 is gripped and rotated, the specific person feels stress. On the other hand, as in the first embodiment, if the authentication determination module 31 performs wireless communication with the authentication key element 4 and user authentication when the manual operation switch 33 is operated, such stress is specified. I don't feel it. However, immediately after the manual operation switch 33 is operated, the electric actuator 28 is actuated to release the lock, and after several seconds, the electric actuator 28 is re-locked. there is a possibility.

  This embodiment is a compromise between both aspects in order to solve the problems of the first and second embodiments described above. The furniture F in this embodiment has both a manual operation switch 33 and a mechanical switch 34 as motion detection sensors. The manual operation switch 33 and the mechanical switch 34 are electrically connected to the authentication determination module 31, respectively. The authentication determination module 31 can receive a pulse signal transmitted from the manual operation switch 33 and the mechanical switch 34. In the present embodiment, the pulse signal output from the manual operation switch 33 is an authentication start signal, and the pulse signal output from the mechanical switch 34 is a lock release permission signal.

  A specific person who intends to open / close the drawer 1 operates the manual operation switch 33 first to cause user authentication processing, and then operates the handle 18 to pull out the drawer 1. The authentication judgment module 31 at this time is a program for performing wireless communication and authentication with the authentication key element 4 when receiving an authentication start signal sent from the manual operation switch 33 as the first motion detection sensor according to the program. Start the routine execution. Then, when the authentication of the specific person is successful, the control module 32 does not immediately output the lock release signal (instead of executing step S4), but indicates that the specific person has been successfully authenticated. Is stored in a required storage area of the main memory or flash memory of the processor unit 311. Accordingly, the authentication determination module 31 successfully authenticates the specific person by referring to the main memory or the flash memory when receiving the unlocking permission signal sent from the mechanical switch 34 as the second motion detection sensor according to the program. It is determined whether or not the information indicating that it has been stored is stored, and if the fact that the identification person has already been successfully authenticated has been confirmed, the control module 32 outputs a lock release signal. If no information indicating that the specific person has been successfully authenticated is stored in the main memory or the flash memory, even if it is detected via the mechanical switch 34 that the handle 18 has been operated, an unlock signal is sent to the control module 32. Do not output.

  According to this embodiment, when the trigger motion detection means obtains a detection result indicating that the positive motion has been performed based on the first motion detection sensor 33, the authentication start signal is output and the second motion detection is performed. The lock release permission signal is output when the detection result indicating that the positive action is performed based on the sensor 34, and the authentication / control means outputs the authentication start signal from the trigger action detection means. When the communication operation is performed for the authentication key element and it is determined that the signal from the authentication key element includes the unlocking authority, the result of the authentication (main memory of the processor unit 311 or Stored in the flash memory), and when the unlocking permission signal is output from the trigger operation detecting means, the unlocking signal is output based on the stored contents. Made which are, first, and can solve the problems of the second embodiment.

  In addition to the above, it goes without saying that the effects described in the first and second embodiments can also be achieved.

  <Fourth Embodiment> In this embodiment, the modes of the lock mechanism and the means for driving the lock are greatly changed from those in the first, second and third embodiments. Hereinafter, description will be made with emphasis on elements different from the first, second, and third embodiments. The trigger motion detection means and motion detection sensor, the authentication determination module 31, and the authentication key element 4 can be configured in the same manner as in the first, second, and third embodiments, and thus detailed description thereof is omitted. To do.

  In this embodiment, one of the drawers 1 possessed by furniture X such as an existing wagon or sleeve desk is replaced (the drawer 1 itself may be replaced, or only the end plate 13 of the drawer 1 may be replaced. The concept is to add a normally lock function using an electric lock and an unlock function through user authentication to the furniture X. Therefore, first, the lock mechanism provided in the casing 6 of the existing furniture X will be described.

  The basic configuration of the housing 6 is similar to that of the housing 2 described in the first embodiment. That is, as shown in FIG. 16, the left and right side walls 61 are connected by a rear wall (not shown) and the upper horizontal member 62, and the internal space that houses the drawers 1, 5 is communicated to the front. . The side wall 61 is formed by fixing the inner plate 612 forming the inner side surface and the rearward surface to the front edge portion of the outer plate 611 forming the outer side surface and the front end surface of the side wall 61 by welding or the like. The front reinforcing surface 613 that reinforces rigidity is constituted by the front end surface, the inner surface, and the rear surface, and has a flat space region that extends in the vertical direction. Needless to say, the drawers 1 and 5 are slidably supported by rails 63 (which may be suspension rails) attached to the inner surface of the side wall 61.

  The lock mechanism for locking the drawers 1 and 5 mainly includes the lock claw support 64 disposed in the space area and the lock claw 641 supported by the lock claw support 64. The lock claw support 64 is a plate-like body that is long in the vertical direction, and is produced by, for example, pressing a sheet metal material. The lock claw support 64 has shaft portions 642 integrally formed at both upper and lower ends, and these shaft portions 642 are supported by bearing bodies 651 and 652 so as to be horizontally rotatable.

  A number of lock claws 641 corresponding to the number of drawers 1 and 5 are provided at the rear edge of the lock claw support 64. These lock claws 641 are cut and raised from the lock claw support 64 and project substantially horizontally toward the inside. Further, at positions corresponding to the lock claws 641 on the inner plate 612 of the side wall 61, claw protrusions and recesses 614 through which the lock claws 641 can pass are formed.

  The lock claw support 64 is biased by the elastic member 66 in a direction in which each lock claw 641 is immersed in a space region formed in the front reinforcing portion 613. In the illustrated example, a torsion coil spring 66, which is an elastic member, is wound around the shaft portion 642 of the lock claw support 64, and one end thereof is supported by the outer plate 611 of the side wall 61 while the other end is inside the lock claw support 64. It is assumed to be in contact with the side surface.

  A lock claw 641 projecting and retracting via the claw projecting opening 614 can lock the drawers 1 and 5 at each stage. That is, as in the first embodiment, the lock claw 641 protruding inward from the claw protrusion / inlet 614 prevents the drawers 1 and 5 from sliding forward.

  Contrary to the case 2 in the first embodiment, as shown in FIG. 17, the lock claw 641 is immersed in the side wall 61 of the case 6 by the elastic biasing by the elastic member 66 during normal times. Therefore, in order to lock the drawers 1 and 5, it is necessary to displace the lock claw support 64 against the elastic biasing force by some method and to cause the lock claw 641 to protrude from the claw protrusion / sink 614. In this embodiment, in principle, the lock claw support 64 is displaced through the movement of the electric actuator 52. The electric actuator 52 is mounted on the drawer 5 disposed in place of the existing drawer 1 (or the end plate 51 mounted in place of the end plate 13 of the existing drawer 1). The electric actuator 52 is a relatively long thin plate-shaped thin plate body, and is on the back side of the end plate 51 so as to be displaceable in the width direction between the unlock position P2 and the lock position P1. 55 is supported. When the electric actuator 52 is in the lock position P1 shown in FIG. 18, the front end of the electric actuator 52 protrudes outward through an opening (not shown) previously formed in the back plate. Further, the tip of the electric actuator 52 enters the front reinforcing portion 613 through the through hole 615 of the side wall 61 of the housing 6, and a portion in front of the shaft portion 642 of the lock claw support 64 is outward. Push. As a result, the rear end portion of the lock claw support 64 pivots inward, and the lock claw support 64 is positioned at the lock claw protrusion position P3 where the lock claw 641 protrudes from the claw protrusion / sink 614. Conversely, when the electric actuator 52 is in the unlocked position P2 shown in FIGS. 17 and 19, the electric actuator 52 does not engage with the lock claw support 64, and the lock claw support 64 has the side wall of the lock claw 641. It is positioned at a lock claw immersing position P4 for immersing in 61.

  The electric actuator 52 is operated by a lock driving means. The lock driving means is also mounted on the drawer 5 disposed in place of the existing drawer 1 (or the end plate 51 attached in place of the end plate 13 of the existing drawer 1). The lock driving means includes an electric actuator 53 that outputs an operating force that operates the electric actuator 52, and a transmission mechanism 54 that transmits the operating force output by the electric actuator 53 to the electric actuator 52. The electric actuator 53 may be supplied with electric power from an external power supply outlet, or may be supplied with electric power from a battery (regardless of its type). In this embodiment, the electric actuator 53 includes a motor 531 capable of rotating in the forward and reverse directions and a reduction gear (existing in the gear box 532) that transmits the rotation of the motor 531. The transmission mechanism 54 includes a rotating member 541 that rotates in the forward and reverse directions by receiving the rotational force of the motor 531 via a reduction gear, and a connecting member 542 that mechanically connects the rotating member 541 and the electric actuator 52. And The rotating member 541 has a substantially disk shape when viewed from the back, and a plurality of protruding pieces 543 are intermittently provided on the outer peripheral portion thereof. These protruding pieces 543 protrude rearward from the rear surface of the rotating member 541. The connecting member 542 is a member that is pivotally supported so as to be freely rotatable about a concentric axis with the rotating member 541, and is superposed on the rear surface of the rotating member 541. The connection member 542 has an arm 544 extending toward the electric actuator 52. The tip of the arm 544 is connected to the electric actuator 52 via a pin 521. Further, the arm 544 is positioned between the projecting pieces 543 of the rotating member 541, and the rotation of the rotating member 541 is transmitted to the connecting member 542 when one of the projecting pieces 543 engages with the side edge of the arm 544. It has become so.

  When the motor 531 rotates in the forward direction, the rotating member 541 that receives the transmission of the rotational force via the reduction gear rotates clockwise in the figure. Then, the protruding piece 543 engages with the side edge of the arm 544, and the arm 544 and the connecting member 542 are rotated clockwise in the drawing. As a result, the electric actuator 52 is displaced rightward in the drawing, that is, outward, and reaches the lock position P1. When the motor 531 rotates in the reverse direction, the rotating member 541 that has received the rotational force via the reduction gear rotates counterclockwise in the figure. Then, the projecting piece 543 engages with the side edge of the arm 544, and the arm 544 and the connection member 542 are rotated counterclockwise in the drawing. As a result, the electric actuator 52 is displaced leftward in the drawing, that is, inward, to reach the unlock position P2.

  Note that a braking body 522 hanging vertically downward is attached to the base end of the electric actuator 52. In addition, limit switches 351 and 352 that are paired so as to sandwich the braking body 522 are provided. The limit switches 351 and 352 function to stop the electric actuator 52 at an appropriate position. When the electric actuator 52 displaced in the width direction reaches the lock position P1, the brake body 522 contacts the limit switch 351 on the right side in the figure, and when the electric actuator 52 reaches the unlock position P2, the brake body 522 is reached. Contacts the limit switch 352 on the left side of the figure. As will be described later, by stopping the rotation of the motor 531 when the braking body 522 contacts any of the limit switches 351 and 352, the electric actuator 52 is appropriately stopped at the lock position P1 or the unlock position P2. be able to.

  In order to achieve the purpose of protecting the objects to be protected stored in the drawers 1 and 5 from a person other than a specific person having a legitimate authority, the electric actuator 52 is operated only when the specific person is successfully authenticated. To unlock. The drive / control unit manages user authentication and control of the electric actuator 53. User authentication is performed by the authentication determination module 31, and control of the electric actuator 53 is performed by the control module 35. The authentication determination module 31 and the control module 35 may be supplied with electric power from an external power supply outlet or may be supplied with electric power from a battery, but normally the electric actuator and the electric power supply source are the same.

  As in the first, second, and third embodiments, the authentication determination module 31 operates hardware resources according to a program and performs processing necessary for user authentication. When the specific person having the right to take away the protection target is successfully authenticated, a signal indicating that fact is output to the control module 35.

  The authentication determination module 31 and the control module 35 are electrically connected, and the control module 35 can receive a signal transmitted from the authentication determination module 31. The actuator control circuit mounted on the control module 35 outputs a lock release signal for releasing the lock by the lock mechanism when receiving a signal indicating that the identification person has been successfully authenticated from the authentication determination module 31. In the present embodiment, the lock release signal is an electrical signal that is applied to the motor 531 to reversely rotate the motor 531.

  Also in this embodiment, the opportunity for wireless communication with the authentication key element 4 is restricted by the authentication / control means (the authentication determination module 31). Specifically, the wireless communication is started only when it is detected that a specific person or a person other than the specific person has used the object to be protected or has taken an active action to take it away. The trigger action detection means detects the positive action by the specific person or a person other than the specific person. The trigger motion detection means may use the manual operation switch 33 or the mechanical switch 34.

  When the user authentication is successful, a signal indicating that is input from the authentication determination module 31 to the control module 35. Upon receiving this signal input, the control module 35 outputs a lock release signal, that is, energizes the motor 531 of the electric actuator 53 to rotate it reversely, and moves the electric actuator 52 to the unlock position P2. As shown in FIG. 20, the limit switches 352 and 351 described above are electrically connected to the control module 35, and the control module 35 has the electric actuator 52 at the unlock position P2 or the lock position P1. It can be detected via limit switches 352 and 351. The control module 35 stops energization of the motor 531 when the electric actuator 52 reaches the unlocked position P2 or the locked position P1, and stops the rotation of the motor 531. When the electric actuator 52 moves to the unlock position P2, the lock claw 641 is immersed in the side wall 61 of the housing 6 and unlocks the drawers 1 and 5.

  In turn, when the electric actuator 52 moves to the lock position P1, the lock claw 641 protrudes from the side wall 61 and enters a locked state in which the drawers 1 and 5 are locked. Unlike the locking mechanism in the first embodiment, the locking mechanism in this embodiment needs to cause both unlocking and locking through displacement of the electric actuator 52. However, the drawers 1 and 5 cannot be properly locked unless the electric actuators 52 are displaced to the lock position P1 in a state where the drawers 1 and 5 of all the stages including the drawer 5 are accommodated in the housing 6. Therefore, it is necessary to provide the drawer 5 with a means for detecting that all the drawers 1 and 5 are accommodated in the housing 6. For example, the drawer 5 has a sensor 353 (mechanical switch, magnet sensor, etc.) for detecting that the drawer 5 is housed in the housing 6, and the drawer 1 disposed adjacent to the top and bottom of the drawer 5. Is provided at the same front and rear position as the drawer 5, and the motor 531 is driven based on the detection results of both sensors. If these sensors 353 and 354 are electrically connected to the control module 35, the control module 35 can sense through the sensors 353 and 354 that all the drawers 1 and 5 are accommodated in the housing 6. . The control module 35 energizes the motor 531 at the time when all the drawers 1 and 5 are accommodated in the housing 6 to rotate the motor 531 in the forward direction, and moves the electric actuator 52 to the lock position P1. In addition, the rotation of the motor 531 is stopped when it is detected via the limit switch 351 that the electric actuator 52 has reached the lock position P1. By configuring the control module 35 (actuator control circuit thereof) as described above, a normally-lock that is automatically locked when all the drawers 1 and 5 are accommodated in the housing 6 is realized. .

  <Fifth Embodiment> This embodiment also greatly changes the modes of the lock mechanism and the lock driving means from those of the first, second, third and fourth embodiments. Hereinafter, description will be given with emphasis on elements different from the first, second, third, and fourth embodiments. The trigger motion detection means and motion detection sensor, the authentication determination module 31, and the authentication key element 4 can be configured in the same manner as in the first, second, third, and fourth embodiments. Description is omitted.

  In the present embodiment, as shown in FIG. 21, a lock system device 7 is retrofitted to a case 6 of furniture X such as an existing wagon, sleeve desk, etc., and this lock system device 7 is used for a normally lock function and user authentication. The concept is to add a new unlock function. The lock system device 7 includes a number of main lock bodies 71 corresponding to the number of stages of the drawer 1 of the furniture X, and the main lock body 71 pushes forward of the drawer 1 to suppress the sliding movement of the drawer 1. is there.

  As shown in FIGS. 21, 22, and 23, the lock mechanism that locks the drawer 1 includes a main lock body 71 that protrudes and retracts at least at the tip from the casing 73, and a state in which the main lock body 71 protrudes from the casing 73. The sub-block body 72 to be maintained in the above is a main component. In the present embodiment, the main lock body 71 is supported so as to be able to protrude and retract in the width direction, and is attached in a direction in which its tip end protrudes inward from the casing 73 by an elastic member (not shown). It is energized. The front end portion of the main lock body 71 protruding from the casing 73 has a substantially triangular shape in plan view, and its rearward edge engages with the corner edge on the front surface side of the end plate 13 of the drawer 1 so that the drawer 1 Prevent forward slide movement. In addition, the leading end of the main lock body 71 protruding from the casing 73 is located on the inner side of the side end portion of the end plate 13 of the drawer 1 and on the outer side of the outer surface of the body plate 11 of the drawer 1. Therefore, when the drawer 1 has already been pulled out from the housing 6, it does not interfere with the body plate 11 although it can engage with the corner edge on the rear surface side of the end plate 13. On the upper surface of the main lock body 71, an upwardly protruding locking body 711 is provided. The locking body 711 has a tapered inner side edge. In addition, a mooring hook 712 having a substantially inverted L shape when viewed from the front is projected from the outer edge of the main lock body 71.

  The sub-block body 72 is a flat member having a substantially square shape in plan view, and its rear end is pivotally supported by a horizontal support shaft 76 provided so as not to move relative to the casing 73. Therefore, the front portion of the sub-block body 72 can swing up and down around the horizontal support shaft 76. The sub-block body 72 is in contact with or close to the upper surface of the main lock body 71 when it takes a substantially horizontal posture. Further, the outer side edge of the sub-block body 72 is positioned so as to be hooked on a mooring hook 712 protruding from the main lock body 71. The front portion of the sub-block body 72 is provided with a locking hole 721 that opens at least downward. The locking hole 721 is for engaging with a locking body 711 provided on the upper surface of the main lock body 71 so as to prevent displacement of the main lock body 71 in the width direction. Further, a leaf spring 722 extending rearward is attached to the sub-block body 72.

  Due to elastic urging by an elastic member (not shown), the front end portion of the main lock body 71 protrudes inward from the casing 73 during normal times. As already described, in this state, the leading end of the main lock body 71 is engaged with the end plate 13 of the drawer 1. In addition, if the engaging hole 721 of the sub-block body 72 is engaged with the engaging body 711 to prevent the main lock body 71 from being displaced in the width direction, the main lock body 71 locks the drawer 1. The sliding movement of the drawer 1 can be suppressed. Therefore, in order to release the lock on the drawer 1, it is necessary to allow the sub-lock body 72 to be flipped up by some method to allow the main lock body 71 to be immersed in the casing 73. In the present embodiment, the sub-block body 72 is swung up and down through the movement of the electric actuator 74. The electric actuator 74 has a substantially crank shape in a plan view, and the rear end side is divided into two forks up and down, and a leaf spring 722 is sandwiched therebetween. The electric actuator 74 swings vertically around the front end axis and swings the sub-block body 72 up and down via the leaf spring 722. When the electric actuator 74 is in the lock position P1 shown in FIG. 24 or 27, the sub-block body 72 takes a substantially horizontal posture, and the locking hole 721 of the sub-block body 72 is formed in the locking body 711 of the main lock body 71. The main lock body 71 is prevented from being displaced by engaging with the concave and convex portions. When the electric actuator 74 is in the unlock position P2 shown in FIG. 25 or FIG. 26, the front portion of the sub-block body 72 jumps up from the upper surface of the main lock body 71, and the engagement between the locking hole 721 and the locking body 711 is achieved. Is eliminated, and the main lock body 71 is allowed to project and retract in the width direction.

  The electric actuator 74 is operated by a lock driving means. The lock driving means is mounted in the casing 73. The lock driving means includes an electric actuator 75 that outputs an operating force for operating the electric actuator 74. The electric actuator 75 may be supplied with power from an external power supply outlet, or may be supplied with power from a battery (regardless of its type). In this embodiment, the electric actuator is a rotary solenoid 75 that rotates the shaft on the front end side of the electric actuator 74 forward and backward within a predetermined angle range.

  When the rotary solenoid 75 rotates in the forward direction, the electric actuator 74 rotates in the same direction to reach the lock position P1, and the sub-block body 72 is set to a substantially horizontal posture. When the rotary solenoid 75 rotates in the reverse direction, the electric actuator 74 rotates in the same direction to reach the unlock position P2, and the front portion of the sub-block body 72 is flipped upward.

  In order to achieve the purpose of protecting the protection object stored in the drawer 1 from a person other than a specific person having a legitimate authority, the electric actuator 74 is operated and locked only when the specific person is successfully authenticated. Can be canceled. The drive / control means manages user authentication and control of the electric actuator 75. User authentication is performed by the authentication determination module 31, and control of the electric actuator 75 is performed by the control module 36. The authentication determination module 31 and the control module 36 may be supplied with electric power from an external power supply outlet or may be supplied with electric power from a battery. Usually, the electric actuator 75 and the electric power supply source are the same.

  As in the first, second, third, and fourth embodiments, the authentication determination module 31 operates hardware resources according to a program and performs processing necessary for user authentication. When the specific person having the right to take away the protection target is successfully authenticated, a signal indicating that fact is output to the control module 36.

  As shown in FIG. 28, the authentication determination module 31 and the control module 36 are electrically connected, and the control module 36 can receive a signal transmitted from the authentication determination module 31. The actuator control circuit mounted on the control module 36 outputs a lock release signal for releasing the lock by the lock mechanism when receiving a signal indicating that the identification person has been successfully authenticated from the authentication determination module 31. In the present embodiment, the lock release signal is an electrical signal that is applied to the rotary solenoid 75 to reversely rotate the rotary solenoid 75.

  Also in this embodiment, the opportunity for wireless communication with the authentication key element 4 is restricted by the authentication / control means (the authentication determination module 31). Specifically, the wireless communication is started only when it is detected that a specific person or a person other than the specific person has used the object to be protected or has taken an active action to take it away. The trigger action detection means detects the positive action by the specific person or a person other than the specific person. The trigger motion detection means may use the manual operation switch 33 or the mechanical switch 34.

  When the user authentication is successful, a signal indicating that is input from the authentication determination module 31 to the control module 36. Upon receiving this signal input, the control module 36 outputs a lock release signal, that is, energizes the rotary solenoid 75 to reversely rotate it, and moves the electric actuator 74 to the unlock position P2. In this embodiment, there are a plurality of main lock bodies 71, sub-block bodies 72, electric actuators 74, rotary solenoids 75, etc. corresponding to the number of stages of the drawer 1, and the control module controls all of these rotary solenoids 75. Apply the unlock signal. When each electric actuator 74 moves to the unlock position P2, each sub-block body 72 jumps up, but the outer side edge of the sub-block body 72 is hooked on the mooring hook 712 of the main lock body 71 as shown in FIG. Thus, the sub-block body 72 does not float up to the uppermost position, and the sub-block body 72 is just urged upward by the leaf spring 722.

  In the state shown in FIG. 25, the displacement of the main lock body 71 is already allowed, and the lock on the drawer 1 at each stage is released. The specific person can pull out the desired drawer 1 from the housing 6. When a certain drawer 1 is pulled out, the main lock body 71 engaged with the end plate 13 of the drawer 1 is pushed into the casing 73 once. Then, the mooring hook 712 of the main lock body 71 is disengaged from the outer side edge of the sub-block body 72, and the sub-block body 72 floats to the uppermost position as shown in FIG. Furthermore, when the end plate 13 of the drawer 1 moves forward from the main lock body 71, the leading end of the main lock body 71 returns to the position where it projects from the casing 73 again due to the elastic biasing force.

  In turn, when the electric actuator 74 moves to the lock position P1, in this embodiment, the sub-lock body 72 tends to descend to a position where the sub-block body 72 assumes a substantially horizontal posture. A sensor 361 (mechanical switch, magnet sensor, etc.) is attached to detect an event that the 71 is once immersed in the casing 73 and then returns to the position where it protrudes from the casing 73 again. These sensors 361 are electrically connected to the control module 36, so that the control module 36 can sense through the sensor 361 that any drawer 1 has been pulled out. The control module 36 stops the output of the lock release signal when any one of the drawers 1 is pulled out, that is, stops energization of the rotary solenoid 75 to rotate it forward, and moves the electric actuator 74 to the lock position P1. Let As a result, the sub-block body 72 associated with the main lock body 71 corresponding to the drawer 1 that has not been pulled out by the specific person returns to the substantially horizontal posture shown in FIG. 24, and the locking hole 721 is locked to the main lock body 71. Re-engage with the body 711 again. On the other hand, the sub-block body 72 attached to the main lock body 71 corresponding to the drawer 1 drawn out by the specific person is in a substantially horizontal position as shown in FIG. 27 due to the presence of the mooring hook 712 of the main lock body 71. The sub-block body 72 is just urged downward by the leaf spring 722. When the drawer 1 is pushed into the housing 6, it engages with the end plate 13 of the drawer 1, the main lock body 71 is pushed into the casing 73, and at the same time, the sub-block body 72 is higher than the height of the mooring hook 712. Descent downward. After that, when the drawer 1 is completely accommodated in the housing 6, the front end of the main lock body 71 returns to the position where it protrudes from the casing 73, and approaches the front of the end plate 13. Then, the locking body 711 of the main lock body 71 is accommodated in the locking hole 721 of the sub-block body 72, and the sub-block body 72 returns to a substantially horizontal posture. By passing through the above process, the normally locked which is automatically locked when the drawer 1 is accommodated in the housing 6 is realized. In addition, even if a power failure, battery exhaustion, electrical system failure, or the like occurs when the sub-block body 72 is locked to the mooring hook 712 as shown in FIG. 27, the drawer 1 is pushed into the housing 6. As long as this is done, the sub-block body 72 descends to the lowest position to prohibit the main lock body 71 from protruding and retracting (regardless of the operation of the electric actuator 75), and the drawer 1 can be re-locked.

  According to this embodiment, the lock driving means is configured to operate the electric actuator 74 between the lock position and the unlock position, and the lock mechanism locks the drawer 1 to the housing 6. The main lock body 71 for locking the movement of the drawer 1 relative to the housing 6 and the movement of the main lock body 71 is prohibited or permitted without being synchronized with the movement of the main lock body 71. The sub-block body 72 is provided, and the sub-block body 72 is driven by the operation of the electric actuator 74, so that a large load acting on the main lock body 71 is prevented from being transmitted to the electric actuator 74 or the like. This can be suppressed, the possibility of failure occurring can be reduced, and the size of the sub-block body 72, the electric actuator 74, etc. can be reduced.

  In addition to the above, it goes without saying that the effects described in the first, second and third embodiments can also be achieved.

  The present invention is not limited to the embodiment described in detail above. In particular, the application target of the system of the present invention is not limited to furniture and furniture having a drawer. If the casing in the above embodiment is regarded as a main body (main body of a storage, a safe, etc.) that stores a protection object, and the end plate of the drawer is regarded as an opening / closing body (door, door, etc.) that closes the main body, It is possible to apply this system as it is to furniture and fixtures that do not have. Further, the lock mechanism may be a device for locking the object to be protected to a tethering member such as a wire (so-called wire lock or the like).

  In addition, the specific configuration of each unit, detailed processing procedure, and the like are not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

The perspective view which shows the drawer in each embodiment of this invention. The principal part disassembled perspective view which shows the housing | casing in 1st Embodiment. The principal part plane sectional view which shows the furniture in the embodiment. The principal part plane sectional view which shows the furniture in the embodiment. The principal part plane sectional view which shows the furniture in the embodiment. The principal part side view which shows the means for a lock drive in the same embodiment, and an electric actuator. The principal part side view which shows the means for a lock drive in the same embodiment, and an electric actuator. FIG. 3 is a hardware resource configuration diagram such as an authentication determination module and a control module in the embodiment. The figure which shows the mode of the radio | wireless communication of the authentication judgment module at the time of user authentication, and the key element for authentication. The hardware resource block diagram of the key element for authentication in the embodiment. The flowchart which shows the procedure of the process which an authentication judgment module performs. The flowchart which shows the procedure of the process which the key element for authentication performs. The figure which shows the Example of the personal authentication by a radio | wireless system. The principal part disassembled perspective view which shows the drawer in 2nd, 3rd embodiment. The principal part perspective view which shows the switch which switches, when it is going to operate the handle in the embodiment. FIG. 3 is a hardware resource configuration diagram such as an authentication determination module and a control module in the embodiment. The principal part disassembled perspective view which shows the housing | casing in 4th Embodiment. The principal part plane sectional view of the furniture in the embodiment. The principal part rear view which shows the means for a lock drive in the same embodiment, and an electric actuator. The principal part rear view which shows the means for a lock drive in the same embodiment, and an electric actuator. FIG. 3 is a hardware resource configuration diagram such as an authentication determination module and a control module in the embodiment. The principal part plane sectional view which shows the furniture and lock mechanism in 5th Embodiment. The principal part perspective view which shows the locking mechanism in the embodiment. The enlarged perspective view which shows the lock mechanism in the same embodiment, the means for a lock drive, and an electric actuator. The principal part side view which shows the means for a lock drive in the same embodiment, and an electric actuator. The principal part side view which shows the means for a lock drive in the same embodiment, and an electric actuator. The principal part side view which shows the means for a lock drive in the same embodiment, and an electric actuator. The principal part side view which shows the means for a lock drive in the same embodiment, and an electric actuator. FIG. 3 is a hardware resource configuration diagram such as an authentication determination module and a control module in the embodiment.

Explanation of symbols

W, X ... Furniture 1, 5 ... Drawer 2, 6 ... Housing 28, 53, 75 ... Electric actuator 33, 34 ... Motion detection sensor 4 ... Key element for authentication P1 ... Lock position P2 ... Unlock position P3 ... Lock claw Projection position P4: Lock claw immersion position

Claims (14)

A wireless authentication key element to be carried by each specific person having the ability to take away the object to be protected;
A lock mechanism that locks the object to be protected so that it cannot be taken away;
Whether or not the specific person or a person other than the specific person performs an active action for using or taking away the object to be protected is detected using one or more action detection sensors, and the active action has been performed. Trigger action detecting means for outputting at least an authentication start signal when obtaining the detection result of
When an authentication start signal is output from this trigger operation detection means, a wireless communication operation is performed on the authentication key element, and it is determined that the signal from the authentication key element includes an unlocking authority. Authentication / control means for outputting a lock release signal as a necessary condition,
A lock driving means for operating the electric actuator to switch the lock mechanism to a state in which the lock can be automatically or passively released when a lock release signal is output from the authentication / control means. Become
A take-away prevention system, wherein at least the lock driving means is set to a normally lock specification. The take-away prevention system according to claim 1, wherein the lock mechanism is for locking the drawer to a housing that slidably supports the drawer. The take-away prevention system according to claim 1, wherein the locking mechanism is for locking the opening / closing body to a main body that supports the opening / closing body so as to be capable of opening / closing. The take-away prevention system according to claim 1, wherein the lock mechanism is for locking the object to be protected to the anchoring member. The take-away prevention system according to claim 1, 2, 3, or 4, wherein the trigger motion detection means uses a manual operation switch as the motion detection sensor. The take-away prevention system according to claim 2 or 3, wherein the trigger motion detection means uses a switch that switches when an attempt is made to operate a drawer or an opening / closing handle as the motion detection sensor. When the trigger motion detection means obtains a detection result indicating that the positive motion has been performed based on the first motion detection sensor, an authentication start signal is output, and the positive motion is performed based on the second motion detection sensor. It is configured to output a lock release permission signal when a detection result indicating that
When the authentication / control unit outputs an authentication start signal from the trigger operation detection unit, the authentication / control unit performs a communication operation on the authentication key element, and the signal from the authentication key element includes the unlocking authority. When authorized, the authorization result is stored, and when the unlocking permission signal is output from the trigger operation detecting means, the unlocking signal is output based on the stored content. Item 7. The take-away prevention system according to Item 1, 2, 3, 4, 5 or 6. 8. The first motion detection sensor is a manual operation switch, and the second motion detection sensor is a switch that is switched when a specific person touches a place that must be touched in order to use or remove the object to be protected. The take-away prevention system described. The lock driving means is configured to operate the electric actuator between a locked position and an unlocked position;
The lock mechanism is configured to be in a locked state or a lockable state when the electric actuator is moved to the lock position, and to be unlocked when the electric actuator is moved to the unlock position. 9. The carry-out prevention system according to claim 1, 2, 3, 4, 5, 6, 7 or 8. The lock driving means is configured to operate the electric actuator between a locked position and an unlocked position;
The lock mechanism is for locking the drawer to the housing, and when the electric actuator moves to the lock position in a state where the drawer is housed in the housing and is closed, the lock mechanism is immediately locked. When the electric actuator is moved to the lock position in a state where the drawer is pulled out from the housing, it is configured to be in a lockable state that can be moved to the locked state by following the operation of closing the drawer. The take-away prevention system according to claim 1 or 2. The lock driving means is configured to operate the electric actuator between a locked position and an unlocked position;
The lock mechanism is for locking a plurality of drawers to a housing, and is provided on the housing and is operable between a lock claw protruding position and a lock claw immersing position; A plurality of lock claws that are provided on the lock claw support corresponding to the drawer and are respectively engaged with the corresponding drawers at the lock claw protruding position to lock the drawers, and are elastically biased by the elastic member. The take-away prevention system according to claim 1 or 2, wherein the lock claw support body can be operated by the driving force of the electric actuator. The elastic member elastically biases the lock claw support in the lock claw protruding position direction,
The holding device according to claim 11, wherein the electric actuator drives the lock claw support body in the direction of the lock claw immersion position against the elastic biasing force when moving from the lock position to the unlock position direction. Leaving prevention system. The elastic member elastically urges the lock claw support in the lock claw immersing position direction,
12. The holding device according to claim 11, wherein the electric actuator drives the lock claw support body in the lock claw protruding position direction against the elastic biasing force when moving from the unlock position to the lock position direction. Leaving prevention system. The lock driving means is configured to operate the electric actuator between a locked position and an unlocked position;
The lock mechanism is for locking the drawer to the housing, and a main lock body for locking the movement of the drawer with respect to the housing, and the main lock body without synchronizing with the movement of the main lock body 3. A take-away prevention system according to claim 1, further comprising a sub-block body that prohibits or allows movement of the sub-block, and the sub-block body is driven by the operation of the electric actuator.

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