JPS6278381A - 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, and the presence or absence of them, and the mechanical or mechanical information such as the unevenness, length and position of the key, and the presence or absence of them. The locking mechanism is released and the lock opens only when a match is found.

In addition, recently, instead of the above-mentioned mechanical locking mechanism using a lock and key, a locking device using electronic control has been developed. For example, such a lock device is equipped with a plurality of numeric buttons on the lock side, and by pressing the button corresponding to a predetermined number, electrical signals (e.g., voltage level, current level, on/off, etc.) can be transmitted. ) by electronic emotion? u
(r I J, "0") and try to open and close electrically without a key. Also known are devices that can be opened and closed contactlessly from a distance by remote control using radio waves, and devices that use magnetic stripe cards with encryption codes recorded on magnetic tape.

[Problems with conventional technology]

In the above-mentioned conventional devices that use mechanical verification means, it is extremely easy to duplicate or fake a key. Furthermore, since a key is required for each lock, it becomes necessary to carry a large number of keys. Furthermore, each lock must be opened and closed manually, etc.
There were many operational and security problems. Furthermore, when changing the lock, all keys must be replaced, and furthermore, there are problems in terms of compatibility and systemization, such as difficulty in integrating or centralizing control.

On the other hand, even with electronically controlled devices that are equipped with the numeric buttons mentioned above, it is necessary to remember the number that must be entered for each lock, and if there are multiple locks, it is easy to forget those numbers. The disadvantage is that it is easy to get lost. In a device using a remote control, the remote control device must be used for each lock, so it is necessary to carry a large number of these devices, increasing the risk of losing them. Even in devices using magnetic stripe cards, there is a problem in that it is necessary to carry a large number of cards in correspondence with each lock, and the cards are easily lost.

Furthermore, these devices pose a security problem because the cryptographic code for opening the lock is fixed.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned conventional problems and provide an electronic key device that can be used with a large number of locks and has excellent security and crime prevention capabilities.

[Key points of the invention]

In order to achieve the above object, the present invention is capable of storing an encryption code for unlocking an electronic lock, outputting the encryption code to the electronic lock at will, and further setting and changing the encryption code. Alternatively, -5 integrity is improved by enabling output only when the bus data match.

[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 of an embodiment in which the present invention is applied to a wristwatch. In the figure, the wristwatch main body 1 is
It is comprised of a display section 2 consisting of a liquid crystal display or the like, and a key operation section 3 including a group of various keys 3a. Keys S1, S2, S3 and LED 4 are provided on the side end surface of the display section 2, and the keys S1, S2 . S3 and the equal (-) key 84, minus (-) key 85, and plus (+) key S6 in the key group 3a have the function of switching the display mode of the display section 2, as will be described in detail later.

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 an engagement 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 is attached to the inside of the lid 12 and is electrically connected to the locking mechanism described above, which rotates four dials to match the numbers. When a light signal corresponding to the number set by this digital switch 14 (RO 425j in FIG. 2) is output from the LED 4 of the wristwatch shown in FIG. The above locking mechanism can only be unlocked using a key.

FIG. 3 shows the circuit configuration of the watch body 1 and the jewelry box 10 shown in FIGS. 1 and 2.

First, the watch body 1 will be explained. The ROM 21 is a fixed memory that contains programs and data that control the entire system.

The address control unit 22 includes an R
OM21(7) is a 7FL/s unit, and the outputs of the ROM 21, the arithmetic unit 25, and the frequency dividing circuit 27 are input thereto. R
AM23 is a memory that outputs the data stored in the address specified in the ROM 21 to the arithmetic unit 25 and the conversion circuit 29, and inputs and stores the results processed and processed by the arithmetic unit 25. The instruction decoder 24 decodes the output of the ROM 21 and
This is a block that sends control signals to the controller. The calculation unit 25 performs calculations using the data in the ROM 23 based on instructions from the ROM 21 and the key input unit 28, writes the result to the address of the RAM 23 specified by the ROM 21, and displays it on the display unit 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 for instructing the system to perform various processing operations, and is a block that sends signals from the outside to instruct the system to perform various processing operations, and is used to control the keys S1, S2, S3 and the key group 3 shown in FIG.
Contains a.

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

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

The photodiode 31 receives an optical signal from the LIED 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 the light that enters through 5. 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 match detection circuit 35 compares the number set by the digital switch 14 described above with the digital signal (cipher code) output from the conversion circuit 34, and outputs a match signal when the contents match. do. The locking mechanism 36 is composed of the protrusion 13 in FIG. 2 and an engaging part in the main body 11, and upon receiving the above coincidence signal, the locking mechanism 36 releases the engagement.
The lock is now released.

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

In the same figure, the RAM 23 includes a time register W, a display register Mode flag N, mode selection flag 0, path data change mode flag P, item/code change setting flag Q, item input mode flag R1 code output mode flag S,
It consists of a timer T, etc.

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 an i1 code set for each item. For example, in FIG. 4, for the jewelry box 15 shown in FIG. 2, the item is set to rJEWELj, and the encryption code is set to "0425" correspondingly. Further, in the case of a house door, a car door, and an office door, the items are set as rDOOR, rCARJ, and [○FFTCEJ, respectively, and an encryption code is set for each item. The pass data storage register 14 is a register that stores pass data, that is, data consisting of a secret number or symbol known only to a specific person, and in FIG. 4, it stores pass data called rollJ.

The pass data setting flag L is the pass data storage register■
] is a flag that is set to “1” when path data is set. The electronic key operation mode flag M is set to "1" in the case of a display mode related to electronic key operation (electronic key operation mode) other than the time display mode, as described below.
" is the flag to be set. Bus data input mode flag N1 mode selection flag 0, path data conversion mode flag P, item/code change setting flag Q, item input mode flag R, and code output mode flag S are as described above. The display mode of display section 2 that has been selected is path data input mode, mode selection mode, path data change mode, and item/item.
This flag is set to "1" when the mode is code change setting mode, item input mode, or code output mode.

The timer T is a timer that measures time in seconds, and the measurement result is used for timing for automatically switching a predetermined display mode.

The main operations of this embodiment having the circuit configuration as described above will be explained below.

First, in FIG. 5, the HALT state (al
), every 1/16 seconds, if there is no key processing instruction from
Timing-related processing is performed sequentially (a2). This timekeeping-related process, which will be described in detail later, is executed by a timekeeping clock signal that is output every 1/16 seconds from the frequency dividing circuit 27 shown in FIG. 3, and the time data obtained by this process is , is stored in the time register W of the RAM 23 shown in FIG.

On the other hand, in Ii AL T shape ra (a 1 ), when keys 81 to 86 are pressed as shown in FIG. 1, key processing is performed (a3). This key processing is performed by pressing the key in the key manual section 28 shown in FIG.
Based on the signal output from ROM21, RAM23
This is a process performed by operations such as.

Key S below! -S [, will be explained about the process and change of display mode when is operated.

FIG. 6 is a flowchart of the process when the key 81 is pressed, and FIG. 16 shows the display changes when each key is operated. However, if the key 81 is pressed, as shown in FIG. 6, it is first determined whether the electronic key 12 operation mode flag M is 1 (bl). As shown in FIG. 16, the flag M is a mode in which the time is displayed when it is 0, and each display on the electronic key is performed when it is 1. If M≠1, that is, the time display mode (16th Mode m in the diagram
+), set M to 1, reset timer T b2), and switch the display mode to electronic key mode (mode m2 in Figure 16) (b2).
3).

If M=1 in step b1 above, that is, in the electronic key operation mode (mode m o in FIG. 16), it is determined whether the item/code change setting flag Q is 1 (ba), Q= If it is 1, that is, if it is the item/code change setting mode (mode m+o in FIG. 16), set O to Q and set the mode selection flag O.
Set 1 to bi) and switch to the mode selection mode (mode m s in FIG. 16). Meanwhile, step b4
If Q≠1, it is necessary to judge whether there are 0 balls or 1.
6) If O=1, that is, mode selection mode m6, set O to 0 and set Q to 1.
(bv) and enter item/code change setting mode ml
Switch to G. Also, in step b5, 07'-
In the case of 1, set M to 0 (b, ,) and switch to time display mode 1. ' m 1 yells.

FIG. 7 shows the processing when the key 82 is pressed.

When the key 82 is pressed, it is first determined whether the electronic key operation mode flag M is 1 (c+), and if M≠1, no processing is performed, and if M=1, the bus data change mode flag P is 1 (c2). If P=1, that is, if the path data change mode (mode m 9 in FIG. 16), P is set to O and the mode selection flag O is set to 1. Setting C3), mode selection mode m
Switch to 6. On the other hand, in step C2, P≠1
In this case, check whether O=1 or not by
, if O=1, set 0 to 0, set the path data change mode flag P to 1 (ci), and switch to the path data change mode m9.

FIG. 8 shows the processing when the key 83 is pressed.

When the key 83 is pressed, it is first determined whether the electronic key operation mode flag M is 1 (dl), and if M≠1, no processing is performed, and if M=1, the pass data input mode flag N is 1 (d2). If N=1, that is, in the pass data input mode (mode m 3 in FIG. 6), set N to 0 (d3) and switch to the electronic key mode m2 (d4).

If N≠1 in step d2, it is determined whether the path data setting flag L is 1, that is, whether the path data is set in the path data storage register 11 (d5). If L=1, set N to 1 and (d
6) Switch to path data input mode m3. on the other hand,
If L≠1 in step d5, determine whether mode selection flag 0 is 1 (d7), and if O=1, set O to 0 and set N to 1 (d8).
, switch to path data input mode m3.

FIG. 9 shows the processing when the key 84 is pressed.

When the key 84 is pressed, it is first determined whether M=1 (e+), and if M≠1, no processing is performed, and if M=1, it is determined whether the item input mode flag R is 1 (e2
). If R≠1, no processing is performed, and if R=1, that is, in the item input mode (m? in Figure 6), set R to O and set the code output mode flag S.
Set 1 to e:+) and switch to the code output mode (mode m e in FIG. 6). Then, the encrypted code corresponding to the input item is taken out from the memory code storage register Z shown in FIG. 4, and this encrypted code is sent to the conversion circuit 29 shown in FIG. 3 (e4).

FIG. 10 shows the processing when the key S5 is pressed. When the key 85 is pressed, it is similarly determined whether M=1 or not, and if M=1, it is determined whether the mode selection flag O is 1 or not. 1, that is, mode selection mode m5, O
is set to O, and the approximate date input mode flag R is set to 1 (f3), and the mode is switched to the item input mode m7.

On the other hand, if 0≠1 in step f2 above, R=
1, r4), if R≠1, do not process, and if R=1, set R to 0 and set O to 1 f5), mode selection mode m
Switch to 5.

FIG. 11 shows the processing when the key 86 is pressed. When the key 86 is pressed, it is similarly determined whether M=1 or not, and if M-1, it is determined whether the item/code change setting flag Q months have passed (g?). If Q≠1, no processing is performed, and if Q=1, the next item and encryption code are read (g3).

The key processing is performed as described above, but in the time-related processing performed at every 1/16 second timing, as shown in FIG.
Display processing (h3) is performed sequentially.

The above timing process (h heat is specifically shown in FIG. 13. First 1
It checks whether or not there is a clock signal every 16 seconds.
(12). Then, it is determined whether this 1716 second counter has reached 16, that is, whether 1 second has elapsed. If 1 second has elapsed, the above 1/16 second counter is reset, and the above time register is 1 is added to the second counter (not shown) in W (i4). Next, the second counter reads 10.
i5), and if 10 seconds have elapsed, reset the second counter and set 1 to the 10 second counter (not shown) in the time register W. Add (i6). And 1
Whether the 0 second counter has counted 6, i.e. 1
Check whether a minute has passed (i7), and if one minute has passed, reset the 10 second counter and add 1 to the minute counter (not shown) in the time register W.
, and then performs other time measurement processing (19).

The mode detection processing (h2), centering and display processing (h3) shown in FIG. 12 are specifically shown in FIGS. 14 and 15.

In FIG. 14, it is first determined whether the electronic key operation mode flag M is 1 (j+), and if M≠1, the time is displayed (j2). This time display is performed by displaying the time data written in the time register W by the time counting process shown in FIG. An example of the display is shown in FIG. 17 (al).

If M=1 in step j1 above, it is determined whether the path data input mode flag N is 1 or not.
If N=1, check whether the path data setting flag L is 1 or not.
That is, it is determined whether the path data has been set (j4). If L=1, input processing of path data is performed (j5), and it is determined whether the set path data and the inputted path data match (j6). If they match, set the pass data input mode flag N to O and set the mode selection flag O to 1 (j?).
, switches to mode selection mode m6 and displays mode selection (j8). An example of this display is shown in FIG. 17(d).

On the other hand, if there is a mismatch in step j6, error processing is performed (j9), and the error display mode is switched to m5 to display an error (j+o).

If L≠1 in step j4, set N to 0 (
jll), switches to the pass data setting mode m4 and displays the pass data setting (j+2).

If N≠1 in step j3, judge whether L=1 or not. If L≠1, it corresponds to bus data setting mode m4, so perform path data setting processing and set L to 1. (j'+a). and,
This set path data is displayed (j+2).

If L=1 in step j+3, it is determined whether the mode selection flag 0 is 1 (j+5), and if 0=1, a mode selection display is performed (j+6).

An example of this display is shown in FIG. 17 (dl).

If O≠1 in step j+5, it is determined whether the path data change mode flag P is 1 (j l 7
). If P=1, perform path data change processing (J
+ [1), Display the changed path data (j
l9).

If P≠1 in step j17, it is determined whether the item/code change setting flag Q is 1 in FIG. 15 (k+). If Q=1, the item and encryption code are changed and set (k2), and the changed items and encryption code are displayed (k3).

If Q≠1 in step 1, it is determined whether the item input mode flag R is 1 (k4), and if R=1, the item input process is performed (k5).

This process is performed by writing the input item data to the display register X. Next, the items written in the display register X are displayed (k6).

An example of the display is shown in FIG. 17(e). In the same figure,
An item rJEWELJ indicating a jewelry box has been input.

If R≠1 in step 4, it is determined whether the code outputting mode flag S is 1 (k)). S=1
In the case of , it corresponds to the item input in step 5.

Outputting the encryption code to the conversion circuit 29 shown in FIG.
Processing for driving the LED 4 is performed (k6). Then, it is determined whether the output of the cipher code has been completed or not (k+o), and if it is still being output, a blinking display is performed as shown in FIG. 17(f) (k+o). The encryption code is output as an optical signal from the LED 4 shown in FIG. 3, and is received by the photodiode 31 of the jewelry box 10. If the number on the digital switch 14 and the encryption code match, the lock is released. If the code output is completed in step 9, the code output mode flag S is set to 0 and the item input mode flag R is set to 1 (k++), and item input display is performed (k6).

If S≠1 in step 7, it means that the time display mode m1 has just been switched to the electronic key mode m2. In this case, timer processing is performed by the timer T shown in FIG. 4 (k12), and it is determined whether two seconds have elapsed (k13). If 2 seconds have not elapsed, the electronic key mode display as shown in FIG.
Set l to k+a) and input and display the path data (k+s). An example of this display is shown in FIG. 17(C).

In the figure, path data called rollJ has been input.

Next, changes in the display mode based on the operation of the keys S+"Sa mentioned above will be explained again with reference to FIG. 16.

First, in the state of time display mode m1, the time is displayed as shown in FIG. Switches to electronic key mode m2, and
An electronic key display as shown in FIG. 7(b) is performed.

2 seconds after switching to electric key mode m2,
Switches to pass data input mode m3.

When path data, for example rOOllJ, is input in this state, an input display as shown in FIG. 17(C) is performed.

Here, only when the input pass data matches the preset pass data, the mode is switched to mode selection mode m6, and electronic key operations can be performed.

If they do not match, the mode is switched to error display mode m5 and an error display is performed. After one second has passed, the mode switches again to the pass data input mode m3, but if an error occurs three times, the mode returns to the time display mode m1. In this way, those who do not know the set pass data,
It is not possible to perform electronic key operations, ie, output encryption codes, change settings of items and LLLF code, change pass data, etc. Note that if the pass data has not been set, the mode will switch to pass data setting mode m4, so
In this state, if the key 83 is pressed after setting the path data arbitrarily, the bus data input mode m3 is entered.

When the path data match and the mode is switched to mode selection mode m6, a display as shown in FIG. 17(d) is displayed. If the user wishes to unlock the electronic lock, press the key S5. Then, the mode switches to item input mode m7. In this state, if you input an item corresponding to the desired electronic lock, for example, rJEWEL for a jewelry box, the input display will change to the first
This is done as shown in Figure 7(e). If you wish to output the encryption code, all you have to do is, for example, point the light output direction of the LED 4 in FIG. 1 toward the keyhole 15 in FIG. 2 and press the key Sa. Then, while the encryption code is being output, the mode is switched to the code outputting mode mθ, and a blinking display is performed as shown in FIG. 17m. When the output of the encryption code is completed, the mode is switched to item input mode m7 again.

In this way, when it is desired to output an encryption code to an electronic lock, there is no need to take the trouble to enter the encryption code on the spot, and it is only necessary to input the desired electronic lock items.

If you wish to change or set an item or code, press key S1 in mode selection mode m6. Then, it switches to item/code change setting mode m1o,
In this state, items and encryption codes can be changed or set.

Each time the key S6 is pressed, the items and code are sequentially switched. If the key 81 is pressed again, the mode returns to mode selection mode m6.

If you want to change the pass data, select mode selection mode m6
key 82 is pressed. Then, the mode switches to the bus data change mode m9, so the path data can be changed in this state. If you want to return to the mode selection mode rrz, just press the key 82 again.

If it is desired to switch from the electronic key operation mode mo, that is, each mode m2 to m1θ related to electronic key operation, to the time display mode m), the key 81 is pressed.

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 electronic locks built into the doors of houses, offices, cars, etc., for example.

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, L
Instead of light from the ED, 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. You can also specify items with just one switch! It may be possible to specify the number of stones.

Furthermore, the pass data is not limited to the above-mentioned numbers; for example, the number of times a predetermined key is operated, the operation time, or the combination of keys for each operation, or a specific voice by incorporating a voice recognition function. It may also be one that allows recognition of words.

[Effects of the Invention] - As explained above, according to the present invention, each electronic lock can be opened and closed by outputting the corresponding code code, so that this device 11 can be used with a large number of locks. This makes it convenient to carry around, and since there is no need to carry around multiple keys or cards, there is almost no need to worry about losing or misplacing them. In addition, since the encryption code can only be set, changed, or generated when the pass data matches, a person who does not know the pass data cannot operate it. It has excellent security and crime prevention functions because it can prevent changes or output from being made.

[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 15 are flow charts showing the processing operations of the same embodiment; FIG. 17 is a diagram showing a change in display mode due to a key operation in the same embodiment, and 17th fal to (') are diagrams showing each display example in the same embodiment. 4... LED. 21 . . . ROM. 23 ...RAM, 29...conversion circuit, Y...item storage register, Z...cipher code storage register, ■(...pass data storage register, ■,...pass data setting flag, M ...Electronic key operation mode flag, N...Pass data input mode flag, 0...Mode selection flag, P...Pass data change mode flag, Q...Item...
Code change setting flag, R...Item input mode flag, S...Code output mode flag. Patent Applicant Casio Computer Co., Ltd. RAM Hoshibu Figure 4 Figure 5 S+ Figure 7 Figure 10 Figure 13

Claims (6)

[Claims] (1) Encrypted code storage means for storing at least one encrypted code for unlocking the electronic lock; Pass data storage means for storing arbitrary pass data in advance; Pass data input for inputting arbitrary pass data. means, a match detecting means for detecting a match between the pass data input by the pass data input means and the pass data stored in the pass data storage means; An electronic key device comprising: cryptographic code sending means for transmitting a cryptographic code to the electronic lock. (2) The encryption code sending means includes an LED, and the LE
2. The electronic key device according to claim 1, wherein the cryptographic code is sent from D as an optical signal. (3) The electronic key device according to claim 1 or 2, wherein the encryption code storage means is a nonvolatile memory. (4) Encrypted code storage means that stores at least one encrypted code for unlocking the electronic lock; Pass data storage means that stores arbitrary pass data in advance; Pass data input that inputs arbitrary pass data. means, a match detecting means for detecting a match between the pass data input by the pass data input means and the pass data stored in the pass data storage means; An electronic key device comprising: means for enabling setting or changing of the cryptographic code in a cryptographic code storage means; and cryptographic code sending means for transmitting the cryptographic code to the electronic lock. . (5) The encryption code sending means includes an LED, and the cipher code sending means includes an LED.
5. The electronic key device according to claim 4, wherein the cryptographic code is sent from D as an optical signal. (6) The electronic key device according to claim 4 or 5, wherein the encryption code storage means is a nonvolatile memory.