CN111527275A

CN111527275A - Communication system for electronic lock, electronic lock control system, electronic lock system, door with electronic lock, key device, communication method for key device, and program

Info

Publication number: CN111527275A
Application number: CN201880083543.0A
Authority: CN
Inventors: 铃木悠太; 栗田昌典; 西尾昭彦; 菅原隆行
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2017-12-27
Filing date: 2018-12-11
Publication date: 2020-08-11
Also published as: JP2019116812A; WO2019131118A1; JP2022141682A; JP7122521B2

Abstract

The purpose of the present disclosure is to improve the responsiveness of processing in which a key device that is not connected to a communication unit is connected to the communication unit. The communication system (4) for an electronic lock is provided with a communication unit (lock-side communication unit (41)) and a management unit (43). The communication unit can simultaneously connect a plurality of key devices (5) of a first number or less by wireless. When the number of the key devices (5) connected to the communication unit reaches a second number, the management unit (43) causes the communication unit to disconnect at least one target key device from the second number of the key devices (5) connected to the communication unit.

Description

Communication system for electronic lock, electronic lock control system, electronic lock system, door with electronic lock, key device, communication method for key device, and program

Technical Field

The present disclosure relates to a communication system for an electronic lock, an electronic lock control system, an electronic lock system, a door with an electronic lock, a key device, a communication method for a key device, and a program, and more particularly, to a communication system for an electronic lock, an electronic lock control system, an electronic lock system, a door with an electronic lock, a key device, a communication method for a key device, and a program, in which a key device and a communication unit of the communication system for an electronic lock are wirelessly connected.

Background

As a conventional example of an apparatus that is connected to a device by wireless, a wireless communication apparatus described in patent document 1 is exemplified. In patent document 1, a wireless communication device operates as a master station of a wireless network, and a slave station device operates as a slave station of the wireless network. In the wireless communication apparatus described in patent document 1, when a wireless connection request is received from a specific external device in a state where the number of slave station devices matches an upper limit number K (K is an integer equal to or greater than 1), the wireless connection with the target device among the K slave station devices is disconnected.

However, in the wireless communication apparatus described in patent document 1, when a wireless connection request is received from a specific external device in a state where the number of slave station devices matches the upper limit number K, the wireless communication apparatus cannot wirelessly connect to the specific external device until the wireless connection with the target device is disconnected. Therefore, the wireless communication apparatus described in patent document 1 has a problem in response to a process of connecting to a specific external device.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-142163

Disclosure of Invention

An object of the present disclosure is to provide a communication system for an electronic lock, an electronic lock control system, an electronic lock system, a door with an electronic lock, a key device, a communication method for a key device, and a program, which improve the responsiveness of processing in which a key device (corresponding to a specific external device) not connected to a communication unit (corresponding to a wireless communication device) of the communication system for an electronic lock is connected to the communication unit.

In order to solve the above problem, a communication system for an electronic lock according to one aspect of the present disclosure includes a communication unit and a management unit. The communication unit is capable of simultaneously connecting a plurality of key devices of a first number or less by wireless. When the number of the key devices connected to the communication unit reaches a second number, the management unit causes the communication unit to disconnect at least one target key device from the second number of the key devices connected to the communication unit. The second number is 2 or more and the first number or less.

An electronic lock control system according to one aspect of the present disclosure includes the electronic lock communication system and an electronic lock control unit. The electronic lock control unit operates the electronic lock in accordance with a command signal for operating the electronic lock, which is transmitted from the key device and received by the communication unit.

An electronic lock system according to an aspect of the present disclosure includes the electronic lock control system and the electronic lock.

A door with an electronic lock according to one embodiment of the present disclosure includes the electronic lock system and a door main body. The electronic lock system is mounted to the door body.

A key device according to an aspect of the present disclosure includes a key-side communication unit. The key-side communication unit is connected to the communication unit of the electronic lock communication system by wireless.

A communication method of a key device according to an aspect of the present disclosure is a communication method of one key device used together with a communication system for an electronic lock. The communication system for the electronic lock is provided with a communication unit. The communication unit may be capable of simultaneously connecting a plurality of the key devices equal to or less than a first number. The communication method of the key device comprises the following steps: the one key device is connected to the communication unit by wireless; and a processing unit configured to receive, when the number of the key devices connected to the communication unit reaches a second number and the one key device matches one of at least one target key device to be disconnected from the communication unit among the second number of the key devices connected to the communication unit, the one key device to disconnect the connection between the one key device and the communication unit, the second number being 2 or more and the first number or less.

A program according to one aspect of the present disclosure is configured to cause a computer system of the key device to execute a communication method of the key device.

Drawings

Fig. 1 is a block diagram of a key device and an electronic lock system according to an embodiment.

Fig. 2 is an explanatory diagram of an example of use of the key device and the electronic lock system.

Fig. 3 is a sequence diagram showing an example of the operation of the electronic lock communication system of the key device and the electronic lock system.

Fig. 4 is a flowchart showing an example of the operation of the electronic lock communication system of the key device and the electronic lock system.

Detailed Description

Hereinafter, a communication system for an electronic lock, an electronic lock control system, an electronic lock system, a door with an electronic lock, a key device, a communication method for a key device, and a program according to embodiments will be described with reference to the drawings. However, the embodiments described below are merely some of the various embodiments of the present disclosure. The following embodiments can be variously modified according to design and the like if the purpose of cost disclosure can be achieved.

(Structure)

As shown in fig. 2, the door 1 with an electronic lock according to the present embodiment includes an electronic lock system 2 and a door main body 11. As shown in fig. 1, the electronic lock system 2 includes an electronic lock control system 3 and an electronic lock 21. The electronic lock control system 3 includes an electronic lock communication system 4 and an electronic lock control unit 31. The electronic lock control unit 31 controls the electronic lock 21 to operate the electronic lock 21.

As shown in fig. 2, the electronic lock system 2 is mounted to the door main body 11. The door main body 11 opens and closes an opening portion 13 of a building 12 (for example, each household of an individual house or a collective house). The door body 11 is, for example, a door such as an entrance door or a back door, or a window such as a trash opening. In the present embodiment, the door main body 11 is a front door. The door body 11 may be a hinge door or a sliding door.

As shown in fig. 1 and 2, the electronic lock communication system 4 is connected to one or more key devices 5 by wireless using radio waves as a medium, and performs wireless communication with the one or more key devices 5. Here, the connection means a state in which mutual communication is possible. The upper limit of the number of key devices 5 that can be connected to 1 electronic lock communication system 4 (hereinafter referred to as the first number) is, for example, 5 (one). Wireless communication is performed between the electronic lock communication system 4 and one or more key devices 5, and the door body 11 is locked or unlocked by the electronic lock 21 according to the content of the wireless communication.

The key device 5 is a mobile phone such as a smartphone, a PDA (Personal Digital Assistant), or a portable terminal such as a tablet terminal. However, the key device 5 is not limited to a portable terminal, and may be an IC (Integrated Circuit) tag or the like. In the present embodiment, a plurality of (for example, 6) key devices 5 are prepared. The plurality of key devices 5 are carried by a plurality of users (for example, a user U1 shown in fig. 2). Each of the plurality of key devices 5 is registered in advance in the electronic lock communication system 4. The plurality of key devices 5 are assigned identification information different from each other. The electronic lock communication system 4 identifies the plurality of key devices 5 based on the identification information of each key device 5.

The electronic lock communication system 4 and the key devices 5 are configured to communicate with each other in compliance with BLE [ Bluetooth (registered trademark) Low Energy: bluetooth low energy ] short-range wireless communication. BLE is a name of a low power consumption specification among specifications of Bluetooth (registered trademark) which is a wireless PAN (Personal area network) technology.

The key device 5 includes a key-side communication unit 51. The key device 5 further includes a key-side control unit 52, a key-side storage unit M5, and a key-side operation unit Op 5.

The key-side communication unit 51 has an antenna and a communication circuit. The key-side communication unit 51 is wirelessly connected to and communicates with a lock-side communication unit 41 (communication unit) of the electronic lock communication system 4, which will be described later. Upon receiving the notification signal Sig1 transmitted from the lock-side communication unit 41, the key-side communication unit 51 transmits a response signal Sig 2. More specifically, upon receiving the notification signal Sig1, the key-side communication unit 51 repeatedly transmits the response signal Sig2 for a predetermined period of time. While the key-side communication unit 51 is connected to the lock-side communication unit 41, the response signal Sig2 is intermittently transmitted to the lock-side communication unit 41.

The key-side control unit 52 controls the operation of the key-side communication unit 51.

Each key device 5 stores the key information and its own identification information in the key-side storage unit M5.

The key-side operation part Op5 is, for example, a touch panel of the key device 5.

The electronic lock communication system 4 includes a lock-side communication unit 41 (communication unit) and a lock-side control unit 42. The lock-side control unit 42 includes a management unit 43, a determination unit 44, a connection restriction unit 45, an authentication unit 46, a region determination unit 47, and a timer unit 48. The communication system 4 for the electronic lock further includes a lock side memory unit M4 and a lock side operation unit Op 4.

The lock-side communication unit 41 and the key-side communication unit 51 are connected to each other by wireless communication and communicate with each other. The lock-side communication unit 41 includes an antenna and a communication circuit. The lock-side communication section 41 intermittently (for example, at 1 second intervals) transmits the notice signal Sig 1. The lock-side communication unit 41 receives the response signal Sig2 transmitted when the key-side communication unit 51 of the key device 5 receives the notification signal Sig 1. Upon receiving the response signal Sig2, the lock-side communication unit 41 outputs information such as the identification information and key information of the key device 5 as the transmission source included in the response signal Sig2 to the lock-side control unit 42.

The lock-side communication unit 41 measures the reception Strength (RSSI) of the Received Signal (for example, the response Signal Sig 2). The lock-side communication unit 41 outputs the measured value of the measured reception intensity to the lock-side control unit 42.

The lock-side control unit 42 and the key-side control unit 52 are each constituted by a computer (microcomputer) having a processor such as a central processing unit, for example. That is, the execution subject of the communication method of the communication system 4 for electronic locks, the electronic lock control system 3, the electronic lock system 2, the door 1 with electronic locks, the key device 5, and the key device 5 in the present disclosure includes a computer system. The computer system has one or more computers. The computer system has a main configuration of a processor and a memory as hardware. The functions as the execution main bodies of the communication method of the electronic lock communication system 4, the electronic lock control system 3, the electronic lock system 2, the door 1 with an electronic lock, the key device 5, and the key device 5 in the present disclosure are realized by executing a program recorded in a memory of a computer system by a processor. The program may be recorded in advance in a memory of the computer system, or may be provided via a telecommunication line, or may be recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive (magnetic disk) readable by the computer system. A processor of a computer system is constituted by one or more electronic circuits including a semiconductor Integrated Circuit (IC) or a large scale integrated circuit (LSI). The plurality of electronic circuits may be integrated into one chip or may be provided in a plurality of chips in a dispersed manner. The plurality of chips may be integrated into one device or may be distributed among a plurality of devices.

The lock side memory unit M4 may be used as a memory of the lock side control unit 42. The key-side storage unit M5 of the key device 5 may be used as a memory of the key-side control unit 52.

When the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number, the management unit 43 causes the lock-side communication unit 41 to disconnect the connection with one of the target key devices of the second number of the key devices 5 connected to the lock-side communication unit 41. The second number is 2 or more and the first number (5) or less. In the present embodiment, the second number is 5 (one). That is, the second number is equal to the first number, which is the upper limit of the number of the key devices 5 that can be connected to the lock-side communication unit 41.

The determination unit 44 determines the target key device based on a predetermined condition. The following predetermined conditions.

When the management unit 43 disconnects the target key device from the lock-side communication unit 41, the connection restriction unit 45 restricts the connection between the target key device and the lock-side communication unit 41 until a predetermined recovery condition is satisfied. The predetermined recovery condition is, for example, a notification to the connection restricting unit 45 that the user has performed a predetermined operation on the key-side operation unit Op5 of the target key device. The key-side communication unit 51 notifies the connection limiting unit 45 of the predetermined operation performed on the key-side operation unit Op5 by a predetermined signal.

The authentication unit 46 authenticates the key device 5 based on the identification information and the key information included in the response signal Sig2 transmitted from the key-side communication unit 51 and received by the lock-side communication unit 41. More specifically, the authentication unit 46 refers to the identification information and the key information of each key device 5 stored in the lock-side storage unit M4 to authenticate the key device 5. When the authentication unit 46 has successfully authenticated the key device 5, the lock-side communication unit 41 is wirelessly connected to the key-side communication unit 51 of the key device 5.

The area determination unit 47 determines the area in which the key device 5 is located, of the first area a1 and the second area a2, based on the measured value of the reception intensity of the response signal Sig2 transmitted from the key-side communication unit 51 of the key device 5 and received by the lock-side communication unit 41 (hereinafter, referred to as area determination).

The first and second regions a1 and a2 are spread out in the vicinity of the door main body 11. The second region a2 is a larger region than the first region a 1. The second region a2 includes the entire first region a 1.

The area determination unit 47 includes, for example, a comparator. The area determination unit 47 determines that the key device 5 is present in the first area a1 if the measured value of the reception intensity of the response signal Sig2 is equal to or greater than the first threshold value. Further, if the measured value of the reception intensity of the response signal Sig2 is equal to or greater than the second threshold value, the area determination unit 47 determines that the key device 5 is present in the second area a 2. The first threshold value is a value greater than the second threshold value. The first threshold is, for example, -70dBm and the second threshold is, for example, -100 dBm. The first threshold value and the second threshold value are determined by, for example, a user operating the electronic lock communication system 4, and are stored in the lock-side storage unit M4.

The timer unit 48 measures the time elapsed since the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number.

The lock-side operation part Op4 of the communication system 4 for an electronic lock is provided, for example, on the door handle 111 of the door main body 11. The lock-side operation part Op4 is, for example, a touch panel.

When the key device 5 is connected to the lock-side communication part 41 and the area judgment part 47 judges that the key device 5 exists in the first area a1, the lock-side operation part Op4 of the communication system 4 for electronic locks receives the first operation by the user, and the key-side operation part Op5 of the key device 5 receives the second operation by the user.

When the key device 5 is connected to the lock-side communication part 41 and the area judgment part 47 judges that the key device 5 exists in the second area a2, the key-side operation part Op5 of the key device 5 receives the second operation by the user.

The first operation is, for example, a touch operation on the lock-side operation part Op4 (touch panel). When the first operation is performed on the lock-side operation part Op4, the electronic lock control part 31 transmits a control signal Sig3 to the drive circuit of the electronic lock 21 to cause the electronic lock 21 to lock or unlock the door main body 11. The first operation may be an operation for locking the door main body 11 or an operation for unlocking the door main body 11. The lock-side operation part Op4 may be attached to a wall surface of the building 12 where the door body 11 is installed or the door body 11. The lock-side operation part Op4 may be a button provided on the door body 11 or the door handle 111 of the door body 11, or the like, and the first operation may be a button operation on the lock-side operation part Op 4.

The second operation is, for example, a click operation or a slide operation of the key-side operation part Op5 (touch panel). In the key device 5, when the second operation is performed on the key-side operation part Op5, the key-side communication part 51 transmits the drive request signal Sig4 to the lock-side communication part 41. When the lock-side communication unit 41 receives the drive request signal Sig4, the electronic lock control unit 31 transmits a control signal Sig3 to the drive circuit of the electronic lock 21 to lock or unlock the door main body 11 by the electronic lock 21. The second operation may be an operation for locking the door main body 11 or an operation for unlocking the door main body 11. The key-side operation part Op5 may be a button of the key device 5, and the second operation may be a button operation on the key-side operation part Op 5.

The electronic lock 21 has a dead bolt (deadbolt), a motor, and a drive circuit. The motor transmits the driving force of the motor to the latch tongue to move the latch tongue between the locked position and the unlocked position. The locked position is a position where at least a part of the latch bolt protrudes from the side surface of the door main body 11 (door) and is inserted into the slot of the door frame. The unlock position is a position where the entire latch bolt is retracted into the door main body 11 inward of the side surface. The drive circuit drives the motor in response to a control signal Sig3 sent from the electronic lock control unit 31 of the electronic lock communication system 4. More specifically, when the control signal Sig3 indicates a lock command, the drive circuit drives the motor to move the latch to the lock position, thereby locking the door main body 11. When the control signal Sig3 indicates an unlock command, the drive circuit drives the motor to move the latch to the unlock position, thereby unlocking the door main body 11.

(action)

Next, how the plurality of key devices 5 and the electronic lock communication system 4 operate and how to switch the wireless connection between the key-side communication unit 51 of each of the plurality of key devices 5 and the lock-side communication unit 41 of the electronic lock communication system 4 will be described with reference to fig. 3 and 4.

As shown in fig. 3, 6 key devices 5 are prepared. Hereinafter, in order to distinguish 6 key devices 5, the 6 key devices 5 are sometimes referred to as key devices 5A, 5B, … …, and 5F, respectively.

The lock-side communication unit 41 of the electronic lock communication system 4 intermittently transmits the notification signal Sig1 (for example, step S1). However, fig. 3 only illustrates the notification signal Sig1 transmitted at a part of the timings among the intermittently transmitted notification signals Sig 1.

In step S1, 4 of the key devices 5A to 5F enter an area (for example, an area including the second area a 2) where the notification signal Sig1 can be received. Therefore, the key-side communication unit 51 of each of the key devices 5A to 5D receives the notification signal Sig 1. In response to this, the key-side communication unit 51 of each of the key devices 5A to 5D transmits a response signal Sig2 to the lock-side communication unit 41 of the electronic lock communication system 4 (step S2).

When the lock-side communication unit 41 receives the response signal Sig2 from each of the key devices 5A to 5D, the authentication unit 46 of the electronic lock communication system 4 authenticates the key devices 5A to 5D based on the identification information and the key information included in the response signal Sig 2. When the authentication unit 46 has successfully authenticated the key devices 5A to 5D, the lock-side communication unit 41 wirelessly connects to the key devices 5A to 5D (step S3).

While the key-side communication unit 51 of the key devices 5A to 5D is connected to the lock-side communication unit 41, the response signal Sig2 is intermittently transmitted to the lock-side communication unit 41.

Further, the lock-side communication unit 41 measures the reception intensity of the response signal Sig2 when receiving the response signal Sig2 from each of the key devices 5A to 5D. The measured value of the reception intensity of the response signal Sig2 is stored in the lock-side memory unit M4 and is output to the lock-side control unit 42.

The area determination unit 47 performs area determination for each of the key devices 5A to 5D based on the measured value of the reception intensity of the response signal Sig 2.

After the key devices 5A to 5D enter the area where the notification signal Sig1 can be received, the key device 5E enters the area. Then, the key-side communication unit 51 of the key device 5E receives the notification signal Sig1 intermittently transmitted from the lock-side communication unit 41 (step S4). In response to this, the key-side communication unit 51 of the key device 5E transmits a response signal Sig2 to the lock-side communication unit 41 of the communication system 4 for electronic locks (step S5).

When the lock-side communication unit 41 receives the response signal Sig2 from the key device 5E, the authentication unit 46 authenticates the key device 5E. At this time, the number of the key devices 5 connected to the lock-side communication unit 41 is 4, and is less than the first number (5) which is the upper limit of the number of the key devices 5 connectable to the lock-side communication unit 41. Therefore, when the authentication unit 46 has successfully authenticated the key device 5E, the lock-side communication unit 41 is wirelessly connected to the key device 5E (step S6).

While the key device 5E is connected to the lock-side communication unit 41, the response signal Sig2 is intermittently transmitted to the lock-side communication unit 41.

The lock-side communication unit 41 measures the reception intensity of the response signal Sig2 from the key device 5E. The measured value of the reception intensity of the response signal Sig2 is stored in the lock-side memory unit M4 and is output to the lock-side control unit 42.

The area determination unit 47 performs area determination for the key device 5E based on the measured value of the reception intensity of the response signal Sig 2.

When the key device 5E is connected to the lock-side communication unit 41, the number of key devices 5 connected to the lock-side communication unit 41 is 5. That is, the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number. Then, the timer unit 48 starts to measure the time elapsed since the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number. The determination unit 44 determines whether or not a predetermined time T1 has elapsed since the number of key devices 5 connected to the lock-side communication unit 41 reached the second number, based on the output of the timer unit 48.

While the number of key devices 5 connected to the lock-side communication unit 41 is the second number, the lock-side communication unit 41 includes information that connection is not possible in the notification signal Sig1 and transmits the notification signal Sig 1. Therefore, when the key device 5F that is not connected to the lock-side communication unit 41 receives the notification signal Sig1 while the number of key devices 5 connected to the lock-side communication unit 41 is the second number, the key-side controller 52 of the key device 5F does not cause the key-side communication unit 51 to transmit the response signal Sig 2. Therefore, the key-side communication unit 51 of the key device 5F is not connected to the lock-side communication unit 41.

Further, it is assumed that a predetermined time T1 (for example, 2 minutes) has elapsed since the number of key devices 5 connected to the lock-side communication unit 41 in step S6 reached the second number (step S7). Then, the determination unit 44 determines the key device 5 (target key device) to be disconnected from the lock-side communication unit 41 from among the key devices 5A to 5E connected to the lock-side communication unit 41, based on predetermined conditions (step S72: see fig. 4).

The predetermined condition is a condition related to the reception intensity of the response signal Sig2 transmitted from the key-side communication unit 51 and received by the lock-side communication unit 41 in each of the key devices 5A to 5E connected to the lock-side communication unit 41. That is, the determination unit 44 determines the target key device based on the measured value of the reception intensity of the response signal Sig2 measured by the lock-side communication unit 41. Specifically, the predetermined condition is, for example, a condition in which the key device 5 that transmits the response signal Sig2 that minimizes the measured value of the reception intensity measured by the lock-side communication unit 41 among the key devices 5A to 5E is set as the target key device. In this case, the key device 5 that is farther from the lock-side communication unit 41 among the key devices 5A to 5E can be easily selected as the target key device. Here, the measured value of the reception intensity of the response signal Sig2 transmitted from the key device 5A among the key devices 5A to 5E is the smallest, and the key device 5A is selected as the target key device.

Here, the reception intensity of the response signal Sig2 is, for example, an average value of the reception intensities from the time point when the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number until a predetermined time T1 elapses. That is, as shown in fig. 4, the lock-side control unit 42 calculates an average value of the response signal Sig2 over a predetermined time T1 (step S71). The determination unit 44 determines the target key device using the average value of the response signal Sig2 over the predetermined time T1 (step S72).

Next, the management unit 43 disconnects the lock-side communication unit 41 from the target key device (key device 5A) (step S8). That is, as shown in fig. 3, the lock-side communication unit 41 is not connected to the key device 5A but is connected to the key devices 5B to 5E. That is, the number of the key devices 5 connected to the lock-side communication unit 41 is 4, which is smaller than the first number (5) that is the upper limit of the number of the key devices 5 that can be connected to the lock-side communication unit 41.

Therefore, thereafter, when the key device 5F enters an area where the notification signal Sig1 can be received, the key-side communication unit 51 of the key device 5F receives the notification signal Sig1 (step S9), and transmits the response signal Sig2 to the lock-side communication unit 41 in response thereto (step S10).

Alternatively, the same as described above is also applied to the following cases: when the key devices 5A to 5E are connected to the lock-side communication unit 41, the key device 5F enters an area where the notification signal Sig1 can be received, and the key device 5F continues to exist in the area until the management unit 43 disconnects the lock-side communication unit 41 from the target key device (key device 5A). That is, in this case as well, the key-side communication unit 51 of the key device 5F receives the notification signal Sig1 and transmits the response signal Sig2 to the lock-side communication unit 41 in response thereto.

In step S10, when the lock-side communication unit 41 receives the response signal Sig2 from the key device 5F, the authentication unit 46 authenticates the key device 5F. At this time, the number of the key devices 5 connected to the lock-side communication unit 41 is 4, and is less than the first number (5) which is the upper limit of the number of the key devices 5 connectable to the lock-side communication unit 41. Therefore, when the authentication unit 46 has successfully authenticated the key device 5F, the lock-side communication unit 41 is wirelessly connected to the key device 5F (step S11).

The following processing is the same as that when the key devices 5A to 5E are connected to the lock-side communication unit 41, and therefore, the description thereof is omitted. When the key device 5F is connected to the lock-side communication unit 41, the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number (5). Therefore, when the predetermined time T1 has elapsed, the determination unit 44 determines, from among the key devices 5B to 5F connected to the lock-side communication unit 41, the target key device to be disconnected from the lock-side communication unit 41, according to the predetermined condition. The management unit 43 disconnects the lock-side communication unit 41 from the target key device.

As described above, when the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number, the management unit 43 disconnects the lock-side communication unit 41 from the target key device. Therefore, the period in which the number of key devices 5 connected to the lock-side communication unit 41 is less than the second number is longer than the period in which the management unit 43 does not perform such processing. When the number of the key devices 5 connected to the lock-side communication unit 41 is less than the second number, the key devices 5 not connected to the lock-side communication unit 41 can be immediately connected to the lock-side communication unit 41. Therefore, according to the present embodiment, it is possible to improve the response of the process in which the key device 5 not connected to the lock-side communication unit 41 is connected to the lock-side communication unit 41.

In step S8, when the management unit 43 disconnects the target key device (key device 5A) from the lock-side communication unit 41, the connection restriction unit 45 restricts the connection of the target key device to the lock-side communication unit 41 until a predetermined recovery condition is satisfied (that is, until a predetermined operation is performed on the key-side operation unit Op5 of the target key device). More specifically, the connection restricting unit 45 identifies the target key device whose connection to the lock-side communication unit 41 is disconnected by the management unit 43 based on the identification information included in the response signal Sig2, and restricts the connection of the target key device to the lock-side communication unit 41 until a predetermined recovery condition is satisfied.

When a predetermined recovery condition is satisfied, the key-side communication unit 51 of the target key device transmits the response signal Sig2 to the lock-side communication unit 41 in response to the notification signal Sig1, and the number of key devices 5 connected to the lock-side communication unit 41 is less than the second number, the target key device is connected to the lock-side communication unit 41 again. In fig. 3, since the predetermined recovery condition is not satisfied, the target key device (key device 5A) is not connected to the lock-side communication unit 41 again.

(modification of predetermined conditions)

Next, a modification example of a predetermined condition for the determination unit 44 to determine the key device 5 (target key device) to be disconnected from the lock-side communication unit 41 from the second number of key devices connected to the lock-side communication unit 41 will be described.

The determination unit 44 may determine not one but a plurality of key devices 5 as the target key device according to a predetermined condition. For example, the predetermined condition may be a condition in which the second number of key devices 5 are preferentially set as the target key devices from the key devices 5 that transmit the response signals Sig2 having the smaller measurement value of the reception intensity measured by the lock-side communication unit 41. More specifically, when the determination unit 44 determines two target key devices, the predetermined condition may be a condition in which the key device 5 that has transmitted the response signal Sig2 that has the smallest measured value of the reception intensity measured by the lock-side communication unit 41 and the key device 5 that has transmitted the response signal Sig2 that has the second smallest measured value of the reception intensity measured by the lock-side communication unit 41 are set as the target key devices.

The determination unit 44 may determine the number of target key devices from 1 or more according to a predetermined condition. For example, the determination unit 44 may decrease the number of the target key devices as the number of the key devices 5 that transmit the response signals Sig2 for which the measured value of the reception intensity measured by the lock-side communication unit 41 is smaller than the predetermined threshold value decreases.

The number of key devices 5 determined as the target key devices and disconnected from the lock-side communication unit 41 is preferably less than the second number.

The predetermined condition may be, for example, a condition in which the second number of key devices 5 are prioritized as the target key devices from the key devices 5 that transmit the response signals Sig2 with small variations (for example, variances) in the measured values of the reception intensity measured by the lock-side communication unit 41. This makes it possible to give priority to the target key device from the key device 5 with a small fluctuation. The deviation of the measured value of the reception intensity may be obtained, for example, by the lock-side control unit 42 from the measured value of the reception intensity starting at the time point when the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number until the predetermined time T1 elapses.

The predetermined condition may be a condition related to the reception intensity of the notification signal Sig1 in each of the second number of key devices 5 connected to the lock-side communication unit 41. More specifically, the key-side communication unit 51 of each key device 5 may measure the reception intensity of the notification signal Sig1 transmitted from the lock-side communication unit 41 and notify the electronic lock communication system 4 of the measured value via the response signal Sig 2. The determination unit 44 may determine the target key device under a predetermined condition related to the measured value of the reception intensity of the notification signal Sig1 in each key device 5. As a specific example, the predetermined condition may be a condition in which the key device 5 having the smaller measured value of the reception intensity of the notification signal Sig1 among the second number of key devices 5 is preferentially set as the target key device. Here, the reception intensity of the notification signal Sig1 is, for example, an average value of the reception intensities until a predetermined time T1 elapses after the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number.

The predetermined condition may be, for example, a condition in which the target key device is prioritized from the key devices 5 of the second number of key devices 5 whose measured values of the reception intensity of the notification signal Sig1 have small variations (for example, variance).

The predetermined condition may be a condition concerning the time elapsed from the connection to the lock-side communication unit 41 in each of the second number of key devices 5 connected to the lock-side communication unit 41. Specifically, the timer unit 48 may measure the time elapsed from the connection of the key device 5 to the lock-side communication unit 41 for each key device 5. The predetermined condition may be a condition in which the target key device is prioritized from the key device 5 with a long elapsed time when the number of key devices 5 connected to the lock-side communication unit 41 among the second number of key devices 5 reaches the second number.

In the embodiment, when the key device 5 is connected to the lock-side communication unit 41 by transmitting the response signal Sig2 (command signal) to the lock-side communication unit 41 by the key device 5 and the area judgment unit 47 judges that the key device 5 is present in the first area a1, the lock-side operation unit Op4 receives the first operation by the user. The user can cause the electronic lock 21 to perform an operation of locking or unlocking the door main body 11 by performing the first operation on the lock-side operation part Op 4. Here, the predetermined condition may be a condition as to whether or not the electronic lock 21 is operated (locked or unlocked) by the response signal Sig2 from each of the second number of key devices 5 connected to the lock-side communication unit 41. For example, it is assumed that some of the second number of key devices 5 connected to the lock-side communication unit 41 transmit the response signal Sig2 to connect to the lock-side communication unit 41, and then the user operates the electronic lock 21 (to lock or unlock) by the first operation of the lock-side operation unit Op 4. In this case, the predetermined condition may be a condition in which the above-described part of the key devices 5 are preferentially set as the target key devices.

When the key device 5 is connected to the lock-side communication unit 41 and the area determination unit 47 determines that the key device 5 is present in the first area a1 or the second area a2, the key-side operation unit Op5 of the key device 5 receives the second operation by the user. The user can cause the key-side communication unit 51 of the key device 5 to transmit the drive request signal Sig4 (command signal) by performing the second operation on the key-side operation unit Op5 of the key device 5, thereby causing the electronic lock 21 to perform the operation of locking or unlocking the door main body 11. Here, the predetermined condition may be a condition as to whether or not the electronic lock 21 is operated by the drive request signal Sig4 from each of the second number of key devices 5 connected to the lock-side communication unit 41. For example, the predetermined condition may be that the key device 5 that has transmitted the drive request signal Sig4 and operated the electronic lock 21 among the second number of key devices 5 connected to the lock-side communication unit 41 is preferentially set as the target key device.

The predetermined condition may be a condition as to whether or not the electronic lock 21 is operated by at least one of the response signal Sig2 and the drive request signal Sig4 from each of the second number of key devices 5 connected to the lock-side communication unit 41. In the case where there are two or more key devices 5 that have operated the electronic lock 21 by at least one of the response signal Sig2 and the drive request signal Sig4, the determination unit 44 may prioritize the key device 5 that has operated the electronic lock 21 at an earlier (or later) time point as the target key device.

In addition, two or more of the plurality of conditions described so far may be combined as the predetermined condition.

For example, when all of the one or more target key devices cannot be determined based on the first condition, the determination unit 44 may determine the remaining target key devices based on the second condition. As a specific example, the first condition may be a condition in which the key device 5 of the second number of key devices 5 that transmitted the response signal Sig2 whose measured value of the reception intensity measured by the lock-side communication unit 41 was small is preferentially set as the target key device. When all of the one or more target key devices cannot be determined based on the first condition, the determination unit 44 may determine the remaining target key devices based on the second condition. The second condition is, for example, a condition that the target key device is prioritized from the key device 5, which is connected to the lock-side communication unit 41 and has a long elapsed time, among the remaining key devices 5.

Alternatively, two or more of the plurality of conditions described so far may be set as predetermined conditions, the number of points of each of the second number of key devices 5 may be calculated for each condition, and the target key device may be prioritized from the key device 5 having a larger (or smaller) total number of points. For example, the larger the number of points may be given to the key device 5 that has transmitted the response signal Sig2 indicating that the measured value of the reception intensity measured by the lock-side communication unit 41 is smaller, and the larger the number of points may be given to the key device 5 that has been connected to the lock-side communication unit 41 for a longer period of time. In addition, the point number may be previously weighted for each condition.

The determination unit 44 may determine the target key device from the key devices 5 other than the key device 5 connected to the lock-side communication unit 41 at the latest time point.

The determination unit 44 may perform the process of determining the target key device according to the predetermined condition until the predetermined time T1 elapses after the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number. For example, the process of the determination unit 44 determining the target key device according to the predetermined condition may be performed immediately after the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number, or may be performed when a predetermined time T1 has elapsed.

(other modification of the embodiment)

Next, other modifications of the embodiment will be described. The following modifications may be implemented in appropriate combination, or may be implemented in appropriate combination with modifications relating to predetermined conditions.

The predetermined recovery condition for releasing the restriction on the connection between the target key device and the lock-side communication unit 41 is not limited to notifying the connection restriction unit 45 that the user has performed a predetermined operation on the key-side operation unit Op5 of the target key device. The predetermined recovery condition may be, for example, a lapse of a predetermined first time (for example, 1 minute) from the time when the management unit 43 disconnects the target key device from the lock-side communication unit 41. Alternatively, the predetermined recovery condition may be that the state in which the target key device is outside the predetermined area (for example, the second area a2 or the area in which the target key device can receive the notification signal Sig1) continues for a predetermined second time (for example, 1 minute). Alternatively, the predetermined recovery condition may be a combination of two or more of the plurality of recovery conditions.

When the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number, the management unit 43 may immediately (for example, within 10 seconds, more preferably within 5 seconds) disconnect the lock-side communication unit 41 from the target key device without waiting for the predetermined time T1 to elapse.

In addition, the management unit 43 may disconnect the lock-side communication unit 41 from the target key device when the number of the key devices 5 connected to the lock-side communication unit 41 reaches the second number, or may disconnect the lock-side communication unit 41 from the key devices 5 according to other conditions. For example, the management unit 43 may disconnect the lock-side communication unit 41 from the key device 5 according to the communication status between the lock-side communication unit 41 and each key device 5. More specifically, when the lock-side communication unit 41 does not receive the response signal Sig2 from the key device 5 for a certain period of time, the management unit 43 may disconnect the lock-side communication unit 41 from the key device 5. Alternatively, the management unit 43 may cause the lock-side communication unit 41 to disconnect the key device 5 when the measured value of the reception intensity of the response signal Sig2 from the key device 5 is equal to or less than a predetermined threshold value. Alternatively, when the electronic lock 21 is operated in response to a command signal (the response signal Sig2 or the drive request signal Sig4) transmitted from the key device 5, the management unit 43 may cause the lock-side communication unit 41 to disconnect the electronic lock from the key device 5. Alternatively, the management unit 43 may disconnect the lock-side communication unit 41 from the key device 5 when a certain time has elapsed since the key device 5 was connected to the lock-side communication unit 41.

Further, while the number of key devices 5 connected to the lock-side communication unit 41 is the second number, the lock-side communication unit 41 of the embodiment includes information that connection is not possible in the notification signal Sig1 and transmits the notification signal Sig 1. Here, the lock-side communication unit 41 may not include the information that connection is impossible in the notification signal Sig 1. In this case, while the number of the key devices 5 connected to the lock-side communication unit 41 is the second number, there is a possibility that the key device 5 not connected to the lock-side communication unit 41 receives the notification signal Sig1 and transmits the response signal Sig 2. At this time, the lock-side communication unit 41 may be configured not to connect to the key device 5 that is not connected to the lock-side communication unit 41, regardless of whether the response signal Sig2 is received.

Further, the predetermined time T1 from when the number of key devices 5 connected to the lock-side communication unit 41 reaches the second number until the management unit 43 disconnects the lock-side communication unit 41 from the target key device may be determined according to the predetermined condition. The predetermined condition may be, for example, a condition in which the predetermined time T1 is set to be shorter as the time elapsed since the connection to the lock-side communication unit 41 is longer in one or more key devices 5 among the second number of key devices 5 connected to the lock-side communication unit 41.

The second number may be a number smaller than the first number, which is an upper limit of the number of key devices 5 that can be connected to the lock-side communication unit 41, and may be 2 or more.

Further, the plurality of key devices 5 may be connected to the lock-side communication unit 41 via a relay.

The key device 5 may include a notification unit that visually or audibly notifies whether or not the key device 5 is connected to the lock-side communication unit 41.

In the embodiment, the management unit 43, the determination unit 44, the connection restriction unit 45, the authentication unit 46, the area determination unit 47, and the timer unit 48, which are originally integrated as the configuration of the lock-side control unit 42, may be provided in a plurality of devices in a distributed manner.

Further, a part of the configuration of the electronic lock communication system 4 may be provided in a plurality of key devices 5 or a computer system such as a server connected to the electronic lock communication system 4 through a telecommunication line or the like.

For example, a structure corresponding to the connection restricting portion 45 may be provided in each of the plurality of key devices 5. That is, each key device 5 may automatically restrict the connection to the lock-side communication unit 41 by not transmitting the response signal Sig2 until a predetermined recovery condition is satisfied when the management unit 43 disconnects the lock-side communication unit 41.

The management unit 43 may be provided in each of the plurality of key devices 5. In the key device 5 corresponding to the target key device, the management unit 43 may be configured to perform the process of disconnecting the key-side communication unit 51 from the lock-side communication unit 41, and the key-side communication unit 51 of the key device 5 may be configured to receive the process of disconnecting the key-side communication unit 41 from the key-side communication unit 51.

The respective components of the electronic lock system 2 may be integrated into one housing or may be distributed among a plurality of housings.

(conclusion)

As described above, the electronic lock communication system 4 according to the first aspect includes the communication unit (lock-side communication unit 41) and the management unit 43. The communication unit can simultaneously connect a plurality of key devices 5 of a first number or less by wireless. When the number of the key devices 5 connected to the communication unit reaches the second number, the management unit 43 causes the communication unit to disconnect at least one target key device from the second number of the key devices 5 connected to the communication unit. The second number is 2 or more and the first number or less.

According to the above configuration, when the number of the key devices 5 connected to the communication unit (lock-side communication unit 41) reaches the second number, the connection between at least one target key device and the communication unit is disconnected. Thus, only the key devices 5 of the number smaller than the second number can be connected to the communication unit before the key devices 5 not connected to the communication unit are connected to the communication unit. In this case, when the key device 5 not connected to the communication unit is to be connected to the communication unit, the key device can be connected to the communication unit without waiting for disconnection between the key device 5 connected to the communication unit and the communication unit. That is, when the key device 5 not connected to the communication unit is to be connected to the communication unit, the key device 5 connected to the communication unit and the communication unit may not wait for disconnection, and the response of the process of connecting the key device 5 not connected to the communication unit and the communication unit may be improved accordingly.

In the electronic lock communication system 4 according to the second aspect, the determination unit 44 is further provided in the first aspect. The determination unit 44 determines at least one target key device based on a predetermined condition.

According to the above configuration, the key device to be disconnected from the communication unit (lock-side communication unit 41) is determined according to the predetermined condition, and therefore the convenience of the electronic lock communication system 4 is improved.

In the electronic lock communication system 4 according to the third aspect, the predetermined condition is a condition relating to at least one of the reception intensities of a signal (for example, the response signal Sig2) transmitted from the key device 5 and received by the communication unit and a signal (for example, the notification signal Sig1) transmitted from the communication unit and received by the key device 5, in each of the second number of key devices 5 connected to the communication unit (the lock-side communication unit 41).

The reception intensity of a signal (for example, the response signal Sig2 or the notification signal Sig1) transmitted and received between the key device 5 and the communication unit (the lock-side communication unit 41) varies depending on the distance between the key device 5 and the communication unit, and the like. That is, according to the above configuration, the determination unit 44 determines the target key device to be disconnected from the communication unit based on the distance between the key device 5 and the communication unit, and the like, and therefore the convenience of the electronic lock communication system 4 is improved. The determination unit 44 can set the key device 5 determined to have a low possibility of communicating with the communication unit as the target key device, for example, based on the distance between the key device 5 and the communication unit.

In the electronic lock communication system 4 according to the fourth aspect, the predetermined condition is a condition relating to the time elapsed from the connection to the communication unit in each of the second number of key devices 5 connected to the communication unit (lock-side communication unit 41) in the second or third aspect.

According to the above configuration, the determination unit 44 determines the target key device to be disconnected from the communication unit based on the condition regarding the time elapsed since the key device 5 was connected to the communication unit (lock-side communication unit 41), and therefore the convenience of the electronic lock communication system 4 is improved. The determination unit 44 can set the key device 5 determined to have a low possibility of communicating with the communication unit as the target key device based on, for example, the time elapsed since the key device 5 was connected to the communication unit.

In the electronic lock communication system 4 according to the fifth aspect, in any one of the second to fourth aspects, the key device 5 transmits a command signal (the response signal Sig2 or the drive request signal Sig4) for operating the electronic lock 21 to the communication unit (the lock-side communication unit 41). The predetermined condition is a condition as to whether or not the electronic lock 21 is operated by a command signal from each of the second number of key devices 5 connected to the communication unit.

With the above configuration, the determination unit 44 determines the target key device to which the connection with the communication unit (lock-side communication unit 41) is to be disconnected, based on the condition as to whether or not the electronic lock 21 is operated by the command signal (response signal Sig2 or drive request signal Sig4) from each of the key devices 5. Thus, the convenience of the communication system 4 for the electronic lock is improved. The determination unit 44 can set the key device 5 determined to have a low possibility of communicating with the communication unit as the target key device, for example, based on a condition as to whether or not the electronic lock 21 is operated by the command signal from each of the key devices 5.

In the electronic lock communication system 4 according to the sixth aspect, in any one of the first to fifth aspects, the management unit 43 causes the communication unit to disconnect at least one target key device after a predetermined time T1 has elapsed since the number of key devices 5 connected to the communication unit (lock-side communication unit 41) reached the second number.

With the above configuration, the electronic lock communication system 4 can perform processing for determining the target key device to be disconnected from the communication unit (lock-side communication unit 41) for a predetermined time period T1. Therefore, it is possible to easily secure a time required to acquire information for deciding the target key device (for example, information to be referred to by the decision unit 44 when deciding the target key device according to a predetermined condition) and the like.

In addition, the electronic lock communication system 4 according to the seventh aspect further includes a connection restriction unit 45 according to any one of the first to sixth aspects. When the management unit 43 disconnects the communication unit (lock-side communication unit 41) from at least one target key device, the connection restriction unit 45 restricts the connection between the communication unit and at least one target key device until a predetermined recovery condition is satisfied.

According to the above configuration, the target key device whose connection with the communication unit (lock-side communication unit 41) is disconnected can be prevented from being immediately reconnected to the communication unit. This makes it possible to more reliably maintain the state in which only a smaller number of key devices 5 than the second number are connected to the communication unit.

The electronic lock control system 3 according to the eighth aspect includes the electronic lock communication system 4 according to any one of the first to seventh aspects, and the electronic lock control unit 31. The electronic lock control unit 31 operates the electronic lock 21 based on a command signal (the response signal Sig2 or the drive request signal Sig4) for operating the electronic lock 21, which is transmitted from the key device 5 and received by the communication unit (the lock-side communication unit 41).

According to the above configuration, it is possible to improve the response of the process of connecting the communication unit to the key device 5 that is not connected to the communication unit (lock-side communication unit 41) of the electronic lock communication system 4. This enables the process of operating the electronic lock 21 using the key device 5 to be performed more quickly.

The electronic lock system 2 according to the ninth aspect is provided with the electronic lock control system 3 according to the eighth aspect and the electronic lock 21.

According to the above configuration, it is possible to improve the response of the process in which the key device 5 not connected to the communication unit (lock-side communication unit 41) of the electronic lock control system 3 is connected to the communication unit. This enables the process of operating the electronic lock 21 using the key device 5 to be performed more quickly.

The door 1 with an electronic lock according to the tenth aspect is provided with the electronic lock system 2 according to the ninth aspect and the door main body 11. The electronic lock system 2 is mounted on the door main body 11.

According to the above configuration, it is possible to improve the response of the process of connecting the key device 5, which is not connected to the communication unit (lock-side communication unit 41) of the electronic lock system 2, to the communication unit. This enables the process of operating the electronic lock 21 using the key device 5 to be performed more quickly.

The key device 5 according to the eleventh aspect is provided with a key-side communication unit 51. The key-side communication unit 51 is wirelessly connected to the communication unit (lock-side communication unit 41) of the electronic lock communication system 4 according to any one of the first to seventh aspects.

According to the above configuration, it is possible to improve the response of the process of connecting the communication unit to the key device 5 that is not connected to the communication unit (lock-side communication unit 41) of the electronic lock communication system 4.

The communication method of the key device 5 according to the twelfth aspect is a communication method of one key device 5 used together with the electronic lock communication system 4. The electronic lock communication system 4 includes a communication unit (lock-side communication unit 41). The communication unit can simultaneously connect a plurality of key devices 5 equal to or less than a first number. The communication method of the key device 5 includes: a step of connecting the one key device 5 to the communication unit by wireless; and a step in which the one key device 5 receives a process of disconnecting the communication unit. And a step of executing a process of receiving disconnection of the communication unit by the one key device 5 when the number of the key devices 5 connected to the communication unit reaches a second number and the one key device 5 corresponds to one of at least one target key device to be disconnected from the communication unit among the second number of the key devices 5 connected to the communication unit. The second number is 2 or more and the first number or less.

Further, the program according to the thirteenth aspect causes the computer system of the key device 5 to execute the communication method according to the twelfth aspect.

The configurations according to the second to seventh aspects are not essential to the electronic lock communication system 4 and can be omitted as appropriate.

Description of the reference numerals

1: a door with an electronic lock; 2: an electronic lock system; 3: an electronic lock control system; 4: a communication system for the electronic lock; 5: a key device; 11: a door main body; 21: an electronic lock; 31: an electronic lock control section; 41: a lock-side communication unit; 43: a management unit; 44: a determination unit; 45: a connection limiting part; 51: a key-side communication unit; sig 1: a notification signal (signal); sig 2: response signals (signals, command signals); sig 4: a drive request signal (instruction signal); t1: for a prescribed time.

Claims

1. A communication system for an electronic lock, comprising:

a communication unit capable of simultaneously connecting a plurality of key devices of a first number or less by wireless; and

and a management unit that causes the communication unit to disconnect at least one target key device from the second number of key devices connected to the communication unit when the number of the key devices connected to the communication unit reaches a second number, the second number being 2 or more and the first number or less.

2. The communication system for electronic locks according to claim 1,

the key management device further includes a determination unit configured to determine the at least one target key device based on a predetermined condition.

3. The communication system for electronic locks according to claim 2,

the predetermined condition is a condition related to at least one of reception intensities of a signal transmitted from the key device and received by the communication unit and a signal transmitted from the communication unit and received by the key device in each of the second number of key devices connected to the communication unit.

4. The communication system for electronic locks according to claim 2 or 3,

the predetermined condition is a condition concerning a time elapsed from the connection to the communication unit in each of the second number of key devices connected to the communication unit.

5. The communication system for electronic locks according to any one of claims 2 to 4,

the key device transmits a command signal for operating the electronic lock to the communication unit,

the predetermined condition is a condition as to whether or not the electronic lock is operated by the command signal from each of the second number of key devices connected to the communication unit.

6. The communication system for electronic locks according to any one of claims 1 to 5,

the management unit causes the communication unit to disconnect the at least one target key device after a predetermined time has elapsed since the number of the key devices connected to the communication unit reached the second number.

7. The communication system for electronic locks according to any one of claims 1 to 6,

the communication device further includes a connection restriction unit that restricts connection between the at least one object key device and the communication unit until a predetermined recovery condition is satisfied when the management unit disconnects the at least one object key device from the communication unit.

8. An electronic lock control system includes:

the communication system for the electronic lock according to any one of claims 1 to 7; and

and an electronic lock control unit that operates the electronic lock in accordance with a command signal for operating the electronic lock, the command signal being transmitted from the key device and received by the communication unit.

9. An electronic lock system, comprising:

the electronic lock control system according to claim 8; and

the electronic lock is provided.

10. A door with an electronic lock is provided with:

the electronic lock system of claim 9; and

a door body to which the electronic lock system is mounted.

11. A key device comprising a key-side communication unit that is connected by wireless to the communication unit of the communication system for electronic locks according to any one of claims 1 to 7.

12. A communication method of a key device used together with a communication system for an electronic lock including a communication unit capable of simultaneously connecting a plurality of key devices of a first number or less, the communication method comprising:

the one key device is connected to the communication unit by wireless; and

when the number of the key devices connected to the communication unit reaches a second number, which is 2 or more and is equal to or less than the first number, and the one key device corresponds to one of at least one target key device to be disconnected from the communication unit among the second number of the key devices connected to the communication unit, the one key device receives a process of disconnecting the connection between the one key device and the communication unit.

13. A program for causing a computer system of the key device to execute the communication method according to claim 12.