JPS6294679A - Electronic key apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic key device that opens and closes a lock in a non-contact manner using radio waves, light, ultrasonic waves, etc.

[Conventional technology]

Traditionally, security devices such as doors and gates of buildings and rooms, car doors, doors and lids of safes, desks, lockers, drawers, etc. have been equipped with locking mechanisms using mechanical locks and keys. . This is a combination of mechanical information such as the unevenness inside the lock, the length and position of pins and cylinders, or their presence or absence, and mechanical information such as the unevenness, length and position of the key, or their presence or absence. The locking mechanism is released and the lock opens only when -It is mechanically or dynamically checked with the combination of -It.

In recent years, instead of the mechanical locking mechanism using a lock and key, an electronically controlled locking device consisting of a so-called electronic key device and an electronic locking device has been developed and used. Such a lock device may include, for example, a remote control device using radio waves or the like within an electronic key device, and the lock can be unlocked in a non-contact manner by sending a code code from the remote control device to the electronic lock device at a distance. Alternatively, a magnetic stripe card with an encryption code recorded on magnetic tape is used as an electronic key device, and the lock can be unlocked by reading the magnetic stripe card with an electronic lock device. Are known.

[Problems with conventional technology]

The conventional electronic key device described above allows the electronic lock device to be opened at any time or time zone as long as a predetermined operation is performed. Therefore, if an electronic lock device is built into a device whose use is prohibited depending on the time of day, such as a safe that cannot be opened or closed at night, or a device that must not stop operating until a predetermined time, the user's If the electronic key device is operated due to carelessness or malice by a third party, there is a problem in that the electronic lock device may be opened even during a time period when it should not be opened.

Furthermore, there was also a concern that the encryption code stored in the electronic key device could be changed by a third party with malicious intent at a time when the user would not be aware of it.

[Purpose of the invention]

In view of the above-mentioned conventional problems, it is an object of the present invention to provide an electronic key device with high safety and crime prevention properties, which cannot unlock the electronic lock device or change the encryption code except at a predetermined time or within a predetermined time period. purpose.

[Key points of the invention]

In order to achieve the above object, the present invention provides a means for arbitrarily setting the time or time zone, and makes it possible to send an encryption code only at that time or time zone. Alternatively, the encryption code can be changed only during certain hours.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view showing an embodiment in which the present invention is applied to a wristwatch. In the figure, the wristwatch main body 1 is
A display section 2- consisting of a liquid crystal display device, etc., and a group of various keys 3a.
It is composed of a key operation section 3 equipped with. Display section 2
Key S is on the side end surface.

S2. The keys St, Sz, S3, and the equal (=) key S4 and minus (-) key S in the key group 3a are provided with the keys St, Sz, S3, and the equal (=) key S4, and the minus (-) key S, which will be described in detail later, but the It has a function to switch the display mode.

Next, FIG. 2 is an external perspective view of the jewelry box 10 whose locking mechanism is released by the electronic key function according to this embodiment. The jewelry box 10 is composed of a main body 11 and a lid 12.
2 is attached to the main body 11 by a hinge or the like (not shown) so that it can be opened and closed. Moreover, inside the lid body 12,
A locking protrusion 13 is provided that engages with a retaining portion (not shown) provided inside the main body 11. These act as a locking mechanism in which when the lid body 12 is closed, the engaging portion and the protruding portion 13 are engaged with each other, thereby automatically locking.

Furthermore, a digital switch 14 for rotating four dials to match the numbers is attached to the inside of the lid 12, and is electrically connected to the locking mechanism. If an optical signal corresponding to the encryption code (RO 425J in FIG. 2) set by this digital switch 14 is output from the LED 4 of the wristwatch in FIG. The above locking mechanism can only be unlocked using a key.

FIG. 3 shows the circuit configuration of the wristwatch main body 1 and the jewelry box IO shown in FIGS. 1 and 2.

First, the wristwatch main body 1 will be explained. ROM21 is
It is a fixed memory that contains the brochure and data that control the entire system.

The address control unit 22 includes an R
Address part of OM21, ROM21, calculation part 25
and the output of the frequency divider circuit 27 are input. RAM2
Reference numeral 3 denotes a memory for outputting the data stored at a designated address in the ROM 21 to the arithmetic unit 25 and the conversion circuit 29, and for inputting and storing the results processed and processed by the arithmetic unit 25. Instruction decoder 24
is a block that decodes the output of the ROM 21 and sends a control signal to each block. Computation block 2
5 performs calculations using the data in the RAM 23 based on instructions from the ROM 21 and the key input block 28, writes the results to the address of the RAM 23 designated by the ROM 21, and displays them on the display section 2. This display section 2 is the same as that shown in FIG. The oscillator 26 outputs a clock signal with a constant period, and the timing generator 27 divides the frequency of the clock signal to a predetermined frequency and outputs a timing signal for controlling each block in time series. The key manual unit 28 is a block that sends signals from the outside to instruct the system to perform each processing operation, and is a block that sends signals from the outside to instruct the system to perform each processing operation, and is a block that sends signals from the outside to the keys S, S2, . S3 and a key group 3a.

The conversion circuit 29 converts the cryptographic code written in the RAM 23, which will be described later, into -H (high) and L (low) serial electrical signals. The transistor 30 turns on and off according to the output signal of the conversion circuit 29, and accordingly the L
By turning the ED4 on and off, an optical signal containing predetermined data is output. This LED 4 is the same as that shown in FIG.

Next, the circuit configuration of the jewelry box 10 will be explained.

The photodiode 31 receives an optical signal from the LED 4 and turns it on and off, thereby converting the optical signal into an electrical signal. Note that this photodiode 31 is attached to the back of the keyhole 15 in FIG.
It is now possible to detect light that enters through the

Furthermore, the photodiode 31 may be replaced by a phototransistor. The amplifier 32 amplifies the electrical signal obtained by the photodiode 31, and the low-pass filter 33 extracts only low frequency components from the output thereof. The conversion circuit 34 converts the output signal of the low-pass filter 33 into a digital signal (cipher code). - The number output circuit 35 compares the encryption code set by the digital switch 14 described above with the encryption code output from the conversion circuit 34, and outputs a match signal when the contents are unfavorable. do. The locking mechanism 36 includes the protrusion 1 in FIG.
3 and an engaging portion within the main body 11, and when the matching signal is received, their engagement is released and the lock is released.

Next, FIG. 4 shows the internal configuration of the RAM 23 mentioned above.

In the figure, the RAM 23 includes a time register W, a display register It consists of a register G, a pass data storage register H1, a time display mode flag M, a pass data setting mode flag N, an item/code setting change mode flag 0, an item selection mode flag P1, a code sending mode flag Q, and the like.

The time register W is a register that stores time data such as hours, minutes, seconds, and 1/16 seconds, and the display register X is a register that temporarily stores data to be displayed on the display section 2 described above. The item storage register Y and the cipher code storage register Z are composed of a plurality of registers, and each register stores items corresponding to various types of locks and cipher codes set for each item. For example, in FIG. 4, for the jewelry box 10 shown in FIG. 2, the item is rJEWELJ, and the corresponding encryption code is set as ro 425J. In addition, in the case of a house door and an office door, the items are rDOORJ,
rOFFIcEJ, and an encryption code is set for each item.

The cipher code sending time period storage register F is a register that stores the time period in which each cipher code can be sent, and allows the start and end times of the time period to be set. For example, the encryption code "0425" corresponding to the item rJEWELJ shown in FIG. 4 is set so that it can be sent during the time period from 5:00 pm (5:00 pm) to 9:00 am. The encryption code setting change time period storage register G is a register that stores the time period in which the encryption code can be set and changed.Similar to the above register F, the start and end times of the time period can be set. There is. For example, the fourth
In the figure, the setting is such that the encryption code can be set and changed during the time period from 8:00 a.m. to 9:00 a.m.

The pass data storage register H is a register that stores pass data, that is, data consisting of secret numbers or symbols known only to a specific person.
It stores path data called ollJ. Time display mode flag M, path data setting mode flag N, items
When the code setting change mode flag 0, item selection mode flag P, and code sending mode flag Q are set to "1", the display mode of the display section 2 is set to the time display mode m5 shown in FIG. 9, respectively. ．． Pass data setting mode m2, item/code setting change mode m3. Item selection mode m4. Code sending mode m.

This is a flag that becomes .

Next, the main operations of this embodiment having the above circuit configuration will be explained below.

First, in FIG. 5, the Hol I-(HALT) state (a
, ), the time counting process is sequentially performed every 16 seconds (C2).

This time-measuring process is executed by a time-measuring clock signal output every 1716 seconds from the frequency divider circuit 27 shown in FIG. 3, the details of which will be described later.

On the other hand, in the HALT state (al), when keys S, -S5, etc. are pressed as shown in FIG. 1, key processing is performed (C3). This key processing is a process performed by operating the ROM 21, RAM 23, etc. based on a signal output from the key input unit 28 shown in FIG. 3 when a key is pressed.

Hereinafter, the process and change in display mode when the keys 81 to S are operated will be described.

FIG. 6 is a flowchart of processing when keys S and -SS are pressed, and FIG. 9 shows changes in display when each key is operated. However, in Fig. 6, first the key S
If the key S1 is pressed, it is determined whether the time display mode flag M is 1 (b2). When M=1, that is, when the display mode is the time display mode m+ shown in FIG. 9, the path data setting mode flag N is set to 1, and M is set to 0 (b3).

If M≠1 in step b2 above, it is determined whether the path data setting mode flag N is 1 (b
,). If N=1, that is, in the pass data setting mode m2, the pass data and encryption code setting change time period input from the key manual section 28 in FIG.
They are stored in the pass data storage register H and the encryption code setting change time period storage register G in FIG. 4, respectively (b,
).

Next, the time display mode flag M is set to 1, and N;L! to cO (b,). Note that if N≠1 in step b4, no processing is performed.

If the key SI was not pressed in step b1 above, it is determined whether the key S3 was pressed next (C
1). If the key S3 is pressed, it is determined whether the time display mode flag M is 1 (C2). If M=1,
That is, if the time display mode is m, it is determined whether there is numerical data, that is, whether numerical data has been input from the key input section 28 (C3). If there is no numeric data, no processing will be performed, and if there is numeric data,
It is determined whether this number data matches the path data stored in the path data storage register H in step b above (C4). If these do not match, no processing is performed, and if they match, the item selection mode flag P is set to 1.
At the same time, the time display mode flag M is set to O (C5).

In step C2, if M≠1, it is determined whether the item selection mode flag P is 1 (C6). P=
If it is 1, that is, if it is the item selection mode m4, the time display mode flag M is set to 1 and P is set to O (C1), and on the other hand, if Pf=1, no processing is performed.

If key S3 was not pressed in step C1 above, it is determined whether key S2 was pressed next (
di). If the key S2 is pressed, it is determined whether the time display mode flag M is 1 (d2). When M=1, that is, when the time display mode is m1, it is determined whether there is numerical data, that is, whether numerical data has been input from the key input section 28 (d3). If there is numeric data, it is determined whether this numeric data matches the bus data stored in the bus data storage register H (d4). If these data match, then it is determined whether the time when the key S2 was pressed is within the time zone stored in the encryption code setting change time zone storage register G in step b mentioned above ( d,
). If the above-mentioned time is within the above-mentioned time zone, the item/code setting change flag O is set to 1, and M is set to O (d,). On the other hand, step d3. d,,d.

If any of them is NO, the process of step d6 is not performed.

If M≠1 in step d2 above, determine whether the item/code setting change flag 0 is 1 (dt)
, when O=1, the time display mode flag M is set to 1 and O is set to O (aO), whereas when 0≠1, no processing is performed.

If the key S2 was not pressed in step d1 above, it is then determined whether the key S4 was pressed (e
+). If the key 84 has been pressed, it is determined whether the item selection mode flag P is 1 (C2), and if it is Pf-1, no processing is performed.

In the case of P=1, that is, in the item selection mode m4,
Whether the time at which the key S4 was pressed is within the time period corresponding to the item input from the key human power section 28 among the time periods stored in the encryption code sending time period storage register F in step f3, which will be described later. (C3). If the above-mentioned time is within the above-mentioned time zone, the encryption code corresponding to the above-mentioned item is sent to the conversion circuit 29 in Fig. 3 (C4);
Next, the code sending mode flag Q is set to 1 and P is set to 0. Note that if the time zones do not match in step e3, no processing is performed.

If key S4 was not pressed in step e1 above, it is then determined whether key S was pressed (
rI). If the key S is pressed, it is determined whether the item/code setting change mode flag 0 is 1 (f2
). ○ If it is -1, that is, if it is item/code setting change mode m, the item, cipher code, and cipher code sending time period inputted from the key manual section 28 are stored in the item storage register Y and the cipher code storage register Z. and is written to a predetermined location in the encryption code sending time zone storage register F, and the next item and encryption code are read out (f3). Note that if 0≠1 in step f2, the process is performed.

The key processing is performed as described above, and next, in the time-related processing a2 shown in FIG. 5, the time-keeping processing g8, mode processing g2, and display processing g3 are sequentially performed as shown in FIG.

The time measurement process h1 is performed by counting 1/16 seconds, 1 second, 1 minute, 1 hour, etc. in the time register W shown in FIG. 4, and storing these count values as time data.

Next, FIG. 8 specifically shows the mode processing g2 and display processing g3.

In the figure, first, it is determined whether the time display mode flag M is 1 (h+), and if M=1, it is determined whether or not there is numeric data (h2). If there is no numerical data, display processing of time, date, etc. is performed (h3). An example of this display is shown in FIG. 10(a).

Additionally, if there is numeric data, display processing of time and numeric data is performed (h4). An example of this display is shown in Figure 10 fb)
Shown below. The figure shows a case where "0011" is input as the numeric data.

If M≠1 in step h1 above, it is determined whether the bus data setting mode flag N is 1 (hs), N
If =1, display processing of the set pass data and encryption code setting change time period is performed (h6). An example of this display is shown in Fig. 1 (C1).

In the same figure, the set path data is rollJ,
It also indicates that the above time period is from 8:00 to 9:00.

In the case of NA3 in step h above, next item
It is determined whether the code setting change mode flag 0 is 1.) If O=1, display processing of the set or changed items, the encryption code, and the encryption code sending time period is performed (h8). An example of this display is shown in FIG. 10(d).

In the figure, for the item “JEWELJ, the encryption code r
04251 and its transmission time period r17:00-9:O
This indicates that OJ has been set or changed.

If 0≠1 in step h7 above, determine whether the item selection mode flag P is 1 (h9), P=
If it is 1, display processing of the selected item is performed (h+.

). An example of this display is shown in FIG. This is the case when item rJEWELJ is selected.

If P≠1 in the above step h, it means that the code sending mode Q=1, and in this case, the encrypted code converted into a serial signal by the conversion circuit 29 shown in FIG. (hz).

Then, it is determined whether or not the transmission of the encryption code has been completed (h+z), and if it has not been completed, a process is performed to display that the code is being transmitted (h13). In this case, the item is notified by blinking as shown in FIG. 10(f). On the other hand, when the transmission of the encryption code is completed, the code transmission mode flag Q is set to 0, and the item selection mode flag P is set to 1 (h14).

Next, how to operate the above-mentioned keys S1-5s and changes in the display mode based on these operations will be explained again with reference to FIG.

First, in the time display mode m1, the time is displayed as shown in FIG. 10(a), as described above. Therefore, when setting the pass data, press the key S+. Then, the mode switches to the pass data setting mode m2, and in this state, the pass data (for example, rollJ
).

Furthermore, in this state, it is possible to set a time period during which items and encryption codes can be set and changed.

At this time, a display as shown in FIG. 10(C) is displayed.

Then, by pressing the key Sl, each of the above data can be stored in a predetermined register.

Next, when setting or changing the items and the encryption code, input the above pass data within the above time period from the time display mode m1. Then, a display like that shown in Fig. 10 (bl) appears, so press the key S2 continuously.The input pass data matches the pass data set above, and the time when the key S2 was pressed is the above time. Only when it is within the band, the mode switches to item/code setting change mode m.

In this state, the key operator 28 is operated to input the item, the code, and the transmission time period. At this time, the 10th
A display like the one shown in Figure (dl) is displayed.Next, by pressing the key S5, each of the above input data can be stored in a predetermined register.
At the same time, the next item etc. can be set or changed. Key S like this.

By alternately performing the operation and inputting items, etc., the fourth
As shown in the figure, multiple items etc. can be set or changed.

To send out the encryption code set or changed in this way, the above-mentioned pass data is input from the time display mode m1. Then, a display like that shown in FIG. 10 (bl) appears, so press S3 again. Only when the input pass data matches the set pass data, the mode switches to item selection mode m4. If you specify a desired item in this state, a display like that shown in FIG. Only when the code is within the specified range, the mode switches to code sending mode m, and the encryption code corresponding to the specified item is sent.During this sending, the item is displayed blinking as shown in Fig. 10(f). When the transmission is completed, the mode is switched to the item selection mode mJ again.In this way, in this embodiment, it is possible to set and change the items and encryption codes only during a predetermined time period.
Furthermore, the encryption code can be sent only during a predetermined time period.

This may be done by simply allowing the time to be set without setting the time zone.

Note that the present invention is applicable not only to the above-mentioned wristwatch, but also to pocket-type small calculators and other items that can be worn on the body. Further, in the above embodiment, a jewelry box is shown as the electronic lock device, but the present invention is not limited to this at all, and can also be applied to, for example, an electronic lock built into the door of a house, office, car, etc.

In addition, the RAM mentioned above is a non-volatile memory, especially an EEP
Preferably, it is a ROM. In this way, even if the battery of a wristwatch or the like runs out, the encryption code will not be lost.

Furthermore, as a medium for transmitting the encryption code, LE
Instead of the light caused by D, radio waves, sound waves, etc. may be used.

Further, the item may use the full name, but may also include only the initial letter or only 2 to 3 letters from the initial letter. Items may also be specified sequentially with a single switch.

Furthermore, the pass data is not limited to the numbers mentioned above; for example, the number of times a predetermined key is operated, the operation time, etc.
Alternatively, it may be possible to recognize a specific voice or word by incorporating a combination of keys for various operations or a voice recognition function.

〔Effect of the invention〕

As explained above, according to the present invention, the encryption code can be sent only at a preset time or time zone, and can be changed, so that a third party who does not know the time or time zone can Alternatively, it is possible to prevent the lock from being opened or the encryption code from being changed due to carelessness, and therefore it is possible to obtain an electronic key device with high safety and security.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing one embodiment of the present invention, Fig. 2 is an external perspective view of a jewelry box whose locking mechanism is released according to the same embodiment, and Fig. 3 is an external perspective view showing the same embodiment and Fig. 2. FIG. 4 is a diagram showing the internal structure of the RAM shown in FIG. 3; FIGS. 5 to 8 are flow charts showing the processing operation of the same embodiment; FIG. 10(al) to (f) are diagrams showing each display example in the same embodiment. 4...LED. 21... ROM. 23...RAM. 29...Conversion circuit, F...Encryption code sending time zone storage register, G...
Outside encryption code setting change time zone storage register H...Pass data storage register, M...Time display mode flag, N...Pass data setting mode flag, 0...Item.
Code setting change mode flag, P...Item selection mode flag, Q...Code sending mode flag, Y...Item storage register, Z...Encryption code storage register. Patent Applicant Casio Computer Co., Ltd. RAM 23 Figure 4 Figure 5 Figure 7 (a) (d) '(b)
(e) Figure 10

Claims (1)

[Claims] 1) Encrypted code storage means for storing an encrypted code for unlocking an electronic lock; Time setting means for setting an arbitrary time or time zone; and Time setting means for setting an arbitrary time or time zone. An electronic key device comprising: cryptographic code sending means for transmitting the cryptographic code stored in the cryptographic code storage means to the electronic lock only at a time or a time period. 2) Encrypted code storage means for storing an encrypted code for unlocking the electronic lock, time setting means for setting an arbitrary time or time period, and only at the time or time period set by the time setting means. , comprising: an encryption code changing means that can change the encryption code stored in the storage means; and an encryption code sending means that sends the encryption code stored in the encryption code storage means to the electronic lock. An electronic key device characterized by: