Locking and unlocking system

Abstract

To provide a locking and unlocking system with high crime prevention performance and low battery consumption.SOLUTION: A locking and unlocking system has a code selection device and a lock, the lock has code input means 11 and code creation means 21, the code creation means 21 creates or selects one or more unlocking codes, the code selection device creates or selects one or more input codes which duplicate the unlocking codes, a code is input to the code input means 11, and the lock can be unlocked on condition that the input code matches the unlocking code, the unlocking code becoming invalid when certain conditions are met.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a locking and unlocking system for homes, accommodation facilities, and the like. [Background technology]

[0002] Locks are installed at the entrances of detached houses and apartments, and people enter and exit by unlocking them. In addition, the entrances are locked when people go out. When selling or renting a house or condominium, a viewing is conducted prior to signing a contract. When viewing a vacant room, a real estate agent or a representative from the management company will often accompany you and lock and unlock the room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7250370 Summary of the Invention [Problem to be solved by the invention]

[0004] Due to a shortage of manpower, there are cases where real estate agents are not present when viewing vacant rooms, etc., and viewings are conducted by those who wish to view the property alone. For example, if the front door is locked with a manual key, a person wishing to view the property will receive a key from the real estate agent or the like and will be able to lock and unlock the property by operating the key themselves. However, this method poses a security risk as people wishing to view the property may have a duplicate key made. The same applies when using coded electronic locks or combination locks with combination codes, as the code or number can be discovered, posing a security problem.

[0005] One way to address security concerns is to use a lock with a changeable PIN code. The lock is equipped with a communication function, and the management company etc. sends an unlocking password (hereafter referred to as a one-time password) to the lock. As a result, the lock that receives the password becomes one that can be unlocked with only the one-time password. Those who wish to view the property will also be notified of the one-time password. Those who wish to view the property can enter the one-time password to unlock the property. Once the viewing is over, the management company etc. will operate the communication means to disable the one-time password for unlocking the lock.

[0006] The above-mentioned method of using one-time passwords provides high security. In addition, since real estate agents do not need to accompany the viewing, fewer personnel are required. However, the above-mentioned locks using one-time passwords have the problem that they consume a lot of power and the battery runs out quickly. That is, locks that use one-time passwords consume power not only for opening and closing the lock, but also for communication. Some electric locks are powered by commercial power sources, but locks that use commercial power sources require a lot of wiring. For this reason, battery-powered electric locks are highly valued, but locks that use one-time passwords as described above consume power not only for opening and closing the lock, but also for communication, so there is dissatisfaction that the batteries wear out quickly and need to be replaced frequently.

[0007] The present invention focuses on the above-mentioned problems and provides a locking / unlocking system that has high security and consumes little battery power. [Means for solving the problem]

[0008] An aspect for solving the above-mentioned problems is a locking / unlocking system having a code selection device and a lock, wherein the lock has a code input means and an unlocking code creation means which creates or selects one or more unlocking codes, the code selection device has an input code creation means which creates or selects one or more input codes which overlap with the unlocking code, and the lock can be unlocked by inputting a code into the code input means and providing that the input code matches the unlocking code, and wherein the unlocking code becomes invalid when certain conditions are satisfied.

[0009] The locking / unlocking system of this embodiment is composed of a code selection device and a lock. The lock is attached to a front door or the like. On the other hand, the password selection device is installed in, for example, a management company, etc. In other words, the password selection device is located away from the lock. In the lock / unlock system of this aspect, the lock side has an unlocking code generating means which generates or selects one or more unlocking codes. In response to this, the code selection device generates or selects one or more input codes which overlap with the unlocking codes. The input password is notified to a person who wishes to view the room, for example. The person who wishes to view the room enters the input password into the lock of a vacant room, for example. Since the input password overlaps with the unlocking password, the input password matches the unlocking password and the lock can be opened. The unlocking code becomes invalid when certain conditions are met, so the unlocking code communicated to those wishing to view the property cannot be misused. Furthermore, in the locking / unlocking system of this embodiment, communication between the lock and the code selection device is not required, and the lock does not require standby power required for communication. Therefore, the lock consumes less power and consumes less battery power.

[0010] In the above-mentioned aspect, it is desirable that the unlocking code creation means creates or selects one or more unlocking codes under certain conditions, and that the input code creation means creates or selects one or more input codes that overlap with the unlocking code by creating or selecting an input code under the same conditions as the unlocking code creation means.

[0011] In the locking / unlocking system of this embodiment, the unlocking code is created or selected under certain conditions, and the input code is created or selected under the same conditions. Therefore, the unlocking code and the input code can be matched without mutual communication between the lock and the code selection device.

[0012] In each of the above-mentioned aspects, it is preferable that the unlocking code creation means has a lock side code storage means for storing a plurality of code candidates, and selects one or more of the code candidates from the code candidates stored in the lock side code storage means in a predetermined order to use them as the unlocking code, and that the code selection device has a selection device side code storage means which stores a plurality of code candidates common to the lock side code storage means, and selects one or more of the code candidates stored in the selection device side code storage means in the same order as the unlocking code creation means to use them as the input code.

[0013] According to this aspect, the unlocking code and the input code can be matched without mutual communication between the lock and the code selection device.

[0014] The locking / unlocking system of this embodiment also comprises a code selection device and a lock. The lock is attached to a front door or the like. On the other hand, the encryption code selection device is installed in, for example, a management company. In this embodiment of the locking / unlocking system, there is a lock side code storage means which stores multiple code candidates on the lock side, and one or more code candidates are selected in a predetermined order from the code candidates stored in the lock side code storage means to be used as the unlocking code. On the other hand, the encryption code selection device has a selection device-side encryption code storage means, which stores encryption code candidates that are common to the lock-side encryption code storage means, and selects one or more encryption code candidates from the selection device-side encryption code storage means in the same order as the lock to use as the input encryption code. Therefore, the input password is the same as the unlock password. The input password is notified to, for example, a person who wishes to view the room. The person who wishes to view the room then enters the input password into, for example, the lock of a vacant room. Since the input password is the same as the unlocking password, the input password matches the unlocking password and the lock can be opened. The unlocking code becomes invalid when certain conditions are met, so the unlocking code communicated to those wishing to view the property cannot be misused.

[0015] In each of the above-mentioned aspects, the unlocking code creation means creates or selects multiple unlocking codes, and if the unlocking code becomes invalid, it is desirable that a new unlocking code be created or selected to replenish it.

[0016] According to this embodiment, new unlocking codes are created or selected and replenished, allowing a large number of users to lock and unlock the door.

[0017] In each of the above-mentioned aspects, it is desirable that the encryption code selection device creates or selects a plurality of the input encryption codes, and when a specified input is made for a particular input encryption code, at least one of the following is performed: the input encryption code becomes unusable or a specified display is displayed.

[0018] According to the locking / unlocking system of this embodiment, it is possible to prevent an invalid password from being mistakenly disclosed.

[0019] In each of the above-mentioned aspects, the encryption code selection device creates or selects a plurality of the input encryption codes, and when the encryption code selection device receives information indicating that the unlocking encryption code has become invalid, it is desirable that a new input encryption code be created or selected to replenish the input encryption code.

[0020] According to the locking / unlocking system of this embodiment, it is possible to prevent an invalid password from being mistakenly disclosed.

[0021] In each of the above-mentioned aspects, it is desirable for the locking / unlocking system to be one in which the unlocking code becomes invalid when one or more of the following conditions are satisfied. (1) If the lock has been artificially locked. (2) A certain amount of time has passed since it was first unlocked. (3) When a certain time is reached. (4) When a certain amount of time has passed since a specified time.

[0022] In each of the above-mentioned aspects, it is preferable that the lock has an indication means, and a predetermined indication is given when the lock is locked.

[0023] According to this embodiment, it is possible to confirm that the door has been locked. In addition, for example, a person wishing to view the property can inform the property manager of the contents displayed on the screen, so that the property manager can confirm that the door has been locked.

[0024] In each of the above aspects, it is preferable that the lock can be locked by inputting a predetermined code.

[0025] For example, a predetermined code may be given by the manager of the real estate, or the code may be displayed on the display means of the lock. Effect of the Invention

[0026] The locking and unlocking system of the present invention has high security and consumes little battery power, so it can be used for a long period of time. [Brief description of the drawings]

[0027] [Figure 1] 1 is a configuration diagram of a locking / unlocking system according to an embodiment of the present invention. [Diagram 2] 2 is a front view of the lock operating section of the locking / unlocking system of FIG. 1. [Diagram 3] FIG. 2 is a block diagram of a lock control device of the locking / unlocking system of FIG. [Figure 4] 2 is a block diagram of a control device of the code selection device of the locking / unlocking system of FIG. 1. [Diagram 5] A list of candidate cryptograms stored in the lock and cryptogram selection device. [Figure 6] This is a list of lock confirmation indicators stored in the lock. [Figure 7] FIG. 2 is an explanatory diagram for explaining the operation of the lock side of the locking / unlocking system of FIG. [Figure 8] This is an explanatory diagram showing the operation of the code selection device of the locking / unlocking system of Figure 1 when there is only one code recipient, where (a) shows the state when four code candidates are initially selected, (b) shows the state when one of the input codes has been notified to several people, and (c) shows the state after a certain amount of time has passed since the input code was notified to the recipient. [Figure 9] This is an explanatory diagram showing the operation of the code selection device of the locking / unlocking system in Figure 1, showing the case where there are two code recipients, where (a) shows the state when person B unlocks the door using a code, and (b) shows the state when person A unlocks the door using a code after person B. [Figure 10] This is an explanatory diagram showing the operation of the code selection device of the locking / unlocking system in Figure 1, showing the case where there are two code recipients. (c) shows the state 24 hours after person B uses the code to unlock the door, and (d) shows the state 24 hours after person A uses the code to unlock the door. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an embodiment of the present invention will be described. 1, a locking / unlocking system 1 of this embodiment is composed of a lock 2 and a code selection device 3. In addition, a portable terminal 5 such as a mobile phone is included as an auxiliary member. The lock 2 is a so-called electric lock, and has an internal drive source (not shown) that extends and retracts the deadbolt 50. The drive source is a motor or a solenoid, and is driven by a built-in battery (not shown). In addition, a handle 51 is attached to the lock 2, and by operating the handle 51, the latch 52 becomes capable of being retracted.

[0029] The lock 2 also has an operating portion 10 as shown in FIG. The operation unit 10 has a code input means 11 , a display means 12 , a lock switch 13 and an unlock switch 15 . The code input means 11 is a known numeric keypad. The code input means 11 may be a touch panel. The display means 12 is a known liquid crystal panel or organic EL panel, and is capable of displaying characters, symbols, and the like.

[0030] In the lock 2 of this embodiment, a code is inputted by the code input means 11. The inputted code is displayed on the display means 12. When the inputted code matches an unlocking code described below, and the unlocking switch 15 is operated, a drive source (not shown) is operated to move the deadbolt 50 backward and enter an unlocked state. When the lock switch 13 is operated, a drive source (not shown) is activated, causing the deadbolt 50 to protrude and enter a locked state.

[0031] A control device (hereinafter referred to as a lock side control device) 20 as shown in Fig. 3 is built into the operation unit 10. The lock side control device 20 has a known CPU and memory. The lock side control device 20 has an unlocking code generating means 21 and a password collating means 22. The unlocking code generating means 21 has a lock side code storing means 23 and a lock side code selecting means 25. The password verification means 22 compares the password inputted from the code input means 11 with an unlocking code, which will be described later. The lock control device 20 also has a built-in timer 26.

[0032] The lock side control device 20 has a lock confirmation code storage means 27. The lock confirmation code storage means 27 stores easy-to-remember numbers as shown in Fig. 6 in order as lock confirmation codes. In this embodiment, when the locking is completed, the locking confirmation code is displayed on the display means 12. The lock side control device 20 also has a switching means 28. The switching means switches between the preview mode and the normal use mode. The switching means 28 employed in this embodiment is a DIP switch, but the preview mode and the normal use mode may also be switched between by operating the encryption code input means 11.

[0033] The lock side controller 20 receives signals from the code input means 11, the lock switch 13, and the unlock switch 15. The lock side controller 20 outputs signals to the display means 12 and the drive source.

[0034] The encryption code selection device 3 is a known personal computer, and includes a CPU and a memory. The encryption code selection device 3 includes a keyboard (input means) 55 and a display screen 56. 4, the encryption code selection device 3 has an input encryption code generation means 31. The input encryption code generation means 31 has a selection device side encryption code storage means 33 and a selection device side encryption code selection means 35. The encryption code selection device 3 also has a timer 36 built in. The cryptographic code selection device 3 includes a communication means 37 .

[0035] Next, the functions of the lock side control device 20 and the cryptographic code selection device 3 will be described. As described above, the lock side control device 20 has the unlocking code generating means 21, and the code selection device 3 has the input code generating means 31. In the locking / unlocking system 1 employed in this embodiment, the unlocking code generating means 21 and the input code generating means 31 have substantially the same functions.

[0036] As described above, the lock side control device 20 has a lock side encryption code storage means 23 and a lock side encryption code selection means 25. On the other hand, the encryption code selection device 3 has a selection device side encryption code storage means 33 and a selection device side encryption code selection means 35. The lock side encryption code storage means 23 and the selection device side encryption code storage means 33 store a plurality of encryption code candidates as shown in the table of Fig. 5. The encryption code candidates stored in the lock side encryption code storage means 23 and the selection device side encryption code storage means 33 are the same. Although not limited thereto, the encryption candidate employed in this embodiment is a six-digit number. Although not limited thereto, 10,000 encryption candidate items are stored in this embodiment. The encryption candidate is a random number, which is a group of numerical values ​​with no regularity. In this embodiment, the encryption candidates are ordered as shown in the table of FIG.

[0037] The lock side code selection means 25 has a code selection function for selecting an unlocking code, and a deletion function for deleting the selected unlocking code under certain conditions. In this embodiment, the lock side cipher selection means 25 selects the unlocking cipher in the order of the cipher candidate list. Although not limited to this, in this embodiment, the four cipher candidate lists with the first through fourth orders are first selected as the unlocking cipher, as shown in FIG.

[0038] Also, when lock 2 is unlocked, after a certain amount of time has passed since it was unlocked, the unlocking code used to unlock it is erased, and the next candidate code in sequence becomes the unlocking code. For example, as shown in Figure 7, first, four candidate codes from 1st to 4th rank are selected as the unlocking codes, and if the lock is unlocked by the unlocking code with 1st rank, after a certain period of time has passed, the unlocking code with 1st rank is erased and becomes unusable, and the next candidate code with 5th rank is selected and becomes the unlocking code. The order in which the unlocking codes are used is arbitrary, and the codes with 2nd rank or lower may be used first.

[0039] The selection device side cipher selection means 35 has a cipher selection function for selecting an input cipher. In this embodiment, the selection device's encryption code selection means 35 selects an input encryption code in the order of the list of encryption code candidates. Although not limited to this embodiment, a list of multiple encryption code candidates displayed in the order of the list is displayed on the display screen 56 as shown in FIG. Next to each encryption candidate, a "Available for use" column, a "Used" column, a "Unused expired" column, a "Date of issue" column, and a "Recipient" column are displayed. As shown in FIG. 8(a), first, four candidate codes are selected from the first through fourth order, and circles are placed in the "Usable" column on the display screen to indicate that they are valid input codes. Also, as shown in Figure 8(b), if any of the input codes has been made known to several people, a circle is added to the "Used" column to indicate that the code has been made known to several people. The input to the "Used" column is done manually by the operator. In this way, when a specific input is made for a specific input password, a specific display is given to prevent duplicate use. The input password can also be erased to make it unusable. The "issue date" field will display the specific date and time of notification. The "recipient" field will display the specific recipient. For example, the recipient's name and email address will be displayed. The "issue date" field and the "recipient" field will also be entered manually by the worker.

[0040] After the recipient is notified of the input password, after a certain period of time has passed, the "Available" column will change to a cross, as shown in Figure 8(c). This change is made automatically. The "Used" field is filled in by the user using the keyboard 55. The "Unused, expired" field is automatically filled with a circle when there is no entry in the "Used" field and a certain amount of time has passed since the input password was notified. Also, the "Available" field is filled with a cross.

[0041] When the "Available" column is marked with a cross, the next candidate code number 5 is selected as the input code, and the "Available" column for the next candidate code number 5 is changed to a circle. In this manner, in this embodiment, when the information that the input cipher has become invalid is input to the cipher selection device 3, a new input cipher is created or selected to replenish it.

[0042] The lock 2 employed in this embodiment has a normal use mode and a preview mode as its operation modes. The normal use mode is an operation mode that is used in the same way as a known electric lock, and the lock can be opened by inputting a preset PIN into the code input means 11. The preview mode is an operation mode in which the lock can be unlocked only when the unlocking code selected by the unlocking code generating means 21 of the lock 2 is entered. When used in the preview mode, the lock cannot be unlocked by entering a normal PIN number.

[0043] Next, a method of using the locking / unlocking system 1 will be described. As described above, the locking / unlocking system 1 of this embodiment is a system designed to be used by those who wish to view the property. When a viewing is expected, the switching means 28 of the lock 2 is switched to the viewing mode. The preview mode is an operation mode in which the lock can be unlocked only when the lock confirmation code selected by the unlocking code generating means 21 of the lock 2 is entered.

[0044] Those who wish to view the property apply for a viewing to a real estate agent or building manager (hereafter referred to as the agent). The agent checks the property requested for viewing, and uses the encryption code selection device 3 to display a list of encryption code candidates for the property on the display screen 56. The agent then informs the person requesting to view the input encryption code that has a circle in the "Available" column. For example, the agent informs the person requesting to view the input encryption code that is ranked number 1. The means for notifying the input password is not limited, and for example, the input password may be notified to a designated mobile terminal 5 by email. The input password may also be notified by telephone or in person. At this time, the user is also informed of precautions to take when locking the door. That is, in the lock 2 of this embodiment, when locking is completed, the lock confirmation code stored in the lock confirmation code storage means 27 is displayed on the display means 12. When locking is completed, a notice is given to inform the dealer of the lock confirmation code as a precaution for locking.

[0045] A person wishing to view the property goes to the property to be viewed and operates the code input means 11 of the operation unit 10 of the lock 2 to input the input code that he or she has been given into the code input means 11. The PIN verification means 22 of the lock 2 compares the PIN entered from the code input means 11 with the unlocking code stored in the lock 2. If the two are the same, a drive source (not shown) is activated to move the deadbolt 50 backward and enter an unlocked state.

[0046] As described above, the unlocking code generating means 21 and the input code generating means 31 have substantially the same functions, the same code candidates are input as data, and the input code and the unlocking code are selected according to the same selection criteria. That is, the input code given by the dealer is the same as the unlocking code. Therefore, if there is no input error, the personal identification number input from the code input means 11 is the unlocking code, and the lock 2 is unlocked.

[0047] After completing the inspection, the person wishing to inspect the property operates the operating unit 10 of the lock 2 to lock the property. In this embodiment, when the locking is completed, the locking confirmation code is displayed on the display means 12. The person who wishes to view the property informs the agent of the locking confirmation code using a mobile terminal or the like. This notification enables the agent to confirm that the property has been locked. If the property is not locked, the person wishing to view the property will not be able to know the lock confirmation code, and the agent will be able to know that the property has not been locked.

[0048] The above-described example of use is for a case where there is only one person wishing to view the property, but this locking / unlocking system can also accommodate cases where there are multiple people wishing to view the property at the same time. For example, Figure 9 shows how to respond when there are two people, Mr. A and Mr. B, who wish to view the property. Let's say that Mr. B unlocks the lock first to view the property. In Figure 9(a), the PIN number issued to Mr. B to unlock the lock was "895411". Mr. B used this PIN to unlock the lock, so this PIN number has already been used. Next, as shown in Figure 9(b), Mr. A unlocks the lock after Mr. B to view the property. The PIN number issued to him at that time to unlock the lock was "592336". Therefore, this PIN number has also been used. Next, as shown in Figure 10(c), 24 hours have passed since Mr. B unlocked the lock, so the PIN number "895411" used by Mr. B can no longer be used. At this point, the PIN number "159874", which had not been available until now, becomes available. Next, as shown in Fig. 10(d), 24 hours have passed since Mr. A unlocked the door, and the PIN number "592336" used by Mr. A can no longer be used, and a new PIN number "246932" can be used. In this embodiment, the PIN number becomes invalid 24 hours after its use, but there is no particular limit to the time.

[0049] In this embodiment, four PIN numbers are always prepared as unlocking codes, so that different unlocking codes can be given to up to four people as input codes. Each person wishing to view the room can unlock the door using the input password that has been notified to him / her. The input password to be selected is one that has a circle mark in the "Usable" column on the display screen indicating that it is a valid input password, and that has not been notified to anyone else.

[0050] Once the viewing is over and the rental or sales contract is signed, the operating mode switches to normal use mode, allowing the door to be unlocked with the PIN number set by the lessor.

[0051] The above-described method of use is intended for a viewing of the property, but the viewing mode is also effective when the renter moves out. For example, when the rental contract ends and the person has decided to move out, the operation mode is switched to the preview mode. Then, the manager informs the person who is leaving of the password to be entered, as described above. When the person has completed leaving and the door has been locked, the lock confirmation code is displayed on the display means 12. The person leaving informs the administrator of the lock confirmation code using a mobile terminal or the like. This notification enables the administrator to confirm that the door has been locked. It is also possible to impose some kind of penalty if the lock confirmation code is not provided. For example, it is possible to return the security deposit on the condition that the lock confirmation code is provided.

[0052] In the above-described embodiment, the unlocking code is a number, but characters such as alphabets and kana letters or other symbols may be used. The unlocking code may also be composed of only alphabets and kana letters.

[0053] As a modified example, a locking PIN code may be provided so that the door can be locked only by using the locking PIN code. It is desirable to create the locking PIN in the same manner as the unlocking code described above. That is, a locking code generating means is provided in the lock side controller 20, and a locking PIN code is generated in the same manner as the unlocking code. The code candidates may be the same as those for the unlocking code, or may be different.

[0054] For example, when the viewing is over, the person who wishes to view the room should inform the manager or the like of the completion of the viewing and be given the PIN number for locking the room. The person who wishes to view the room can then use the PIN number to lock the room. Once the locking is complete, a lock confirmation code is displayed on the display means 12.

[0055] The locking / unlocking system 1 described above does not require communication between the lock 2 and the code selection device 3. The lock 2 does not require standby power required for communication. Therefore, the lock 2 consumes little power and consumes little battery power. Furthermore, the locking / unlocking system 1 is highly secure since it unlocks the lock 2 using a code that cannot be known by a third party.

[0056] In the embodiment described above, the unlocking code etc. is selected in order from code candidates stored in advance, but the present invention is not limited to this selection method. For example, from among pre-stored code candidates, a code candidate with a number corresponding to the current date may be selected as the unlocking code, etc. For example, if the date is April 1, 2023, the 2341st code candidate is selected as the unlocking code, etc. Also, the unlocking password and the input password may be newly created under the same conditions.

[0057] In the embodiment described above, when a certain amount of time has passed since the lock was unlocked, the unlocking code used to unlock the lock is erased and the original unlocking code becomes invalid, but the conditions for invalidating the unlocking code are not limited to this. For example, the following are conditions under which the unlocking code becomes invalid: For example, if lock 2 is manually locked, there is no need to re-enter, so the unlocking code may be invalidated. For example, the unlocking code may be invalidated when it reaches a time when there is no possibility of a visitor coming, such as midnight. In other words, the unlocking code may be invalidated when a certain time is reached. In addition, the unlocking code can be invalidated when a certain amount of time has elapsed from a predetermined time. For example, the unlocking password may be invalidated when a certain period of time has elapsed since the door was locked.

[0058] The above-described method of use utilizes the locking and unlocking system of an apartment or detached house, but the present invention can also be used in lodging facilities. In this case, the code selection device 3 is installed at the front desk or elsewhere. [Explanation of symbols]

[0059] 1 Locking and unlocking system 2 tablets 3 Cipher selection device 10 Control section 11. Means of inputting cipher code 12 Display means 20 Lock side control device 21 How to create a decryption code 22 PIN verification method 23 Lock side encryption storage means 25 Lock side encryption selection means 27 Lock confirmation code storage means 28 Switching means 33 Selection device side encryption storage means 35 Selection device side encryption selection means

Claims

1. A locking / unlocking system having a code selection device and a lock, said lock having a code input means and an unlocking code generating means for generating or selecting one or more unlocking codes; The encryption code selection device has an input encryption code creation means for creating or selecting one or more input encryption codes that overlap with the unlocking encryption code, The lock can be unlocked by inputting a code into the code input means and the input code being consistent with the unlocking code, A locking / unlocking system characterized in that the unlocking code becomes invalid when certain conditions are satisfied.

2. The unlocking code generating means generates or selects one or more unlocking codes under certain conditions, The locking / unlocking system as described in claim 1, characterized in that the input code creation means creates or selects one or more input codes that overlap with the unlocking code by creating or selecting an input code under the same conditions as the unlocking code creation means.

3. the unlocking code generating means has a lock side code storage means for storing a plurality of code candidates, and selects one or a plurality of the code candidates in a predetermined order from the code candidates stored in the lock side code storage means to generate the unlocking code; The locking / unlocking system described in claim 1, characterized in that the encryption code selection device has a selection device side encryption code storage means, which stores a plurality of encryption code candidates that are common to the lock side encryption code storage means, and which selects one or more from the encryption code candidates stored in the selection device side encryption code storage means in the same order as the unlocking encryption code creation means to use them as the input encryption code.

4. A locking / unlocking system having a code selection device and a lock, The lock has a code input means and a lock side code storage means for storing a plurality of code candidates, and selects one or more of the code candidates stored in the lock side code storage means in a predetermined order as an unlocking code, The encryption code selection device has a selection device-side encryption code storage means, which stores encryption code candidates common to the lock-side encryption code storage means, and selects one or more encryption code candidates from the encryption code storage means on the selection device in the same order as the lock, to be used as an input encryption code; A code is input to the input means, and the lock can be unlocked on condition that the input code matches the unlocking code, A locking / unlocking system characterized in that the unlocking code becomes invalid when certain conditions are satisfied.

5. The locking / unlocking system described in claim 1, characterized in that the unlocking code creation means creates or selects multiple unlocking codes, and if the unlocking code becomes invalid, a new unlocking code is created or selected to replenish it.

6. The locking / unlocking system described in claim 1, characterized in that the code selection device creates or selects a plurality of the input codes, and when a specified input is made for a particular input code, at least one of the following is executed: the input code becomes unusable or a specified display is displayed.

7. The locking / unlocking system described in claim 1, characterized in that the encryption code selection device creates or selects a plurality of the input encryption codes, and when the encryption code selection device receives information indicating that the unlocking code has become invalid, a new input encryption code is created or selected to replenish the code.

8. 8. The locking / unlocking system according to claim 1, wherein the unlocking code is invalidated when one or more of the following conditions are satisfied: (1) If the lock has been artificially locked. (2) When a certain amount of time has passed since it was first unlocked. (3) When a certain time is reached. (4) When a certain amount of time has passed since a specified time.

9. 8. The locking / unlocking system according to claim 1, wherein the lock has a display means, and when the lock is locked, a predetermined display is given.

10. 10. The locking / unlocking system according to claim 9, wherein the lock can be locked by inputting a predetermined code.

Images