JPH053648Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electronic key lock device, and particularly to an electronic key lock device that can be unlocked without contact.

[Prior art and its problems] In the conventional lock device, the key is inserted into the hole in the lock,
By rotating the key, the difference in physical shape or pattern between the key and the lock is mechanically verified to ensure security in opening and closing the lock device.

However, with these mechanical lock devices,
This poses a security problem because it is relatively easy to make copies or imitations of keys. In addition, if different keys are installed on each door, door, window, etc., it is necessary to prepare multiple types of keys for each lock.
Managing keys was difficult. Furthermore, if the matching pattern between the key and the lock needs to be changed because the lock has been opened maliciously, the key itself must be replaced, which is uneconomical.

In addition, in recent years, it has become common practice to key-in a PIN code into a lock device or set a magnetic card in the lock device, so that the key-in information and the information input from the magnetic card match the PIN data preset in the lock device. An electronic lock device has been devised that is unlocked when the door is opened.

However, since these electronic lock devices are contact-type, it is possible to electrically malfunction or destroy the lock drive mechanism to open the lock, and security is still not sufficient. Furthermore, with the key input method, there is a risk that the password code may be discovered or the correct password code may be entered by chance. Furthermore, with the magnetic card method, there is a possibility that the magnetic card may be copied or counterfeited.

[Purpose of the invention] The present invention was developed under the above-mentioned circumstances, and its purpose is to provide an electronic key lock device that can improve key management and lock security. It's about doing.

[Summary of the invention] In order to achieve the above-mentioned purpose, this invention transmits a signal corresponding to a PIN code stored in advance in the storage means of the lock to a predetermined transmission means from the key transmission means built in a daily carry item such as a wristwatch. The feature is that the lock can be unlocked by transmitting the number of times without contact.

[Example] Hereinafter, the configuration and operation of the present invention will be explained in more detail using an example.

Configuration FIG. 1 is a circuit block diagram of an electronic key lock device according to an embodiment of the present invention.
Electronic lock 2 attached to doors, doors, windows, case lids, etc.
It is composed of.

The electronic key built into the electronic wristwatch 1 includes an operating section 3 having a switch for at least setting a transmission mode to the electronic key 2, inputting transmission information, and inputting a transmission command. The operation signal is output to the control circuit 4. The control circuit 4 encodes the operation signal input from the operation unit 3 and outputs it to the input code memory 5, stores the input code in the input code memory 5, and sends a pulse to the transmission number counter 6 based on a transmission command. The input code is outputted one by one, and when the count value of the transmission number counter 6 is less than or equal to a predetermined value N, the input code stored in the input code memory 5 is read out. The transmission number counter 6 counts the pulses output from the control circuit 4 and outputs the count value to the control circuit 4. In addition, the input code read from the input code memory 5 is
The data is input to the encoding circuit 7 and also to the display control circuit 8, and its contents are displayed on the display section 9 under the control of the display control circuit 8.

The encoding circuit 7 converts the input code read from the input code memory 5 into a code signal to be transmitted to the electronic lock 2, and outputs the code signal to the transmitting circuit 10. A light emitting diode 11 and a transistor 12 for driving the light emitting diode 11 are connected to the transmitting circuit 10 via resistors R1 and R2, respectively, and the optical signal output from the light emitting diode 11 is transmitted The circuit 10 is controlled by switching the fixed frequency ON/OFF based on the code signal. In this way, the light emitting diode 11 transmits the optical connection signal corresponding to the operation signal of the operation unit 3 to the electronic lock 2 a predetermined number of times.

Note that the electronic wristwatch 1 with a built-in electronic lock is
It is an electronic digital wristwatch, and is naturally equipped with an oscillation circuit 13, a frequency dividing circuit 14, and a timekeeping circuit 15. It is shared by the clock section and the clock section. Since this electronic wristwatch 1 is worn on the wrist and carried around all the time, by incorporating an electronic key into the electronic wristwatch 1, it is possible to reduce the chances of keys being lost or not being carried. Improves sex.

The electronic lock 2 is attached to a part such as a door or the like that should be prohibited from being opened by a third party, and includes a photodiode 16 which is a light receiving element, a receiving circuit 18 to which a resonant circuit 17 is connected, and this receiving circuit 18. A decoding circuit 19 is provided for decoding the time-series analog signal from the digital signal into a digital signal. Further, a password code is stored in the password code memory 20 in a non-volatile manner, and this password code is verified against the digital signal from the decoding circuit 19 by a verification circuit 21 . The matching circuit 21 outputs a matching signal to the matching number counter 22 when the password code and the digital signal match. This matching number counter 22
counts the match signals output from the matching circuit 21 and outputs the count value to the control circuit 23. The control circuit 23 controls the count value to a predetermined value N.
Activates the lock control circuit 24 only when the
The lock control circuit 24 controls the opening operation of the lock mechanism 25. Note that the predetermined number of transmissions N using the electronic key,
The number N of coincidence detection by the electronic lock 2 is the same number. Further, the PIN code memory 20 may be configured to be rewritable so that the PIN code can be changed when the PIN code is obtained for a third time.

Operation Next, the operation of the embodiment configured as described above will be explained.

First, the operation of the electronic key of the electronic wristwatch 1 will be explained. When unlocking the electronic lock 2 using this electronic key, the user operates the operation unit 3 to set the key mode, and then inputs the information corresponding to the PIN code stored in the PIN code memory 20. do. Then, the control circuit 4 executes control based on the key mode, converts the pin code correspondence information input as the operation signal of the operation unit 3 into a binary code of "0" and "1", and converts the parallel digital signal string ( The input code is stored in the input code memory 5 as an input code. Subsequently,
When a transmission command signal is input by operating the operation unit 3, the control circuit 4 outputs one pulse signal to the transmission number counter 6. Then, the transmission number counter 6 is incremented by "1" by the pulse signal, and the count value is outputted to the control circuit 4. If the count value of the transmission circuit counter 6 is less than or equal to the predetermined value N, this indicates that the input code has not been transmitted a predetermined number of times, so the control circuit 4 outputs an access signal to the input code memory 5 to read the input code. Read the input code from memory 5. This input code is output as a parallel digital signal to the encoding circuit 7, and this encoding circuit 7 converts the parallel digital signal into a serial digital signal string, and outputs it to the transmitting circuit 10 as transmission data arranged in time series. do.

Then, the transmission circuit 10 turns the fixed frequency ON/OFF based on this transmission data, and resistor R2
The signal is output to the base terminal of the transistor 12 via. This base input signal is amplified by the amplification effect of transistor 12, so transistor 12
A light emitting diode 11 connected to the collector terminal of
becomes movable to drive in response to the base input signal,
Fixed frequency ON/output from the transmitting circuit 10
It turns ON/OFF in response to an OFF signal and emits an intermittent light signal.

When the light wave signal corresponding to the input code is transmitted in this way, the control circuit 4 again outputs one pulse signal to the transmission number counter 6 and obtains a count value from the transmission number counter 6. If this count value is less than or equal to the predetermined value N, the light wave signal corresponding to the input code is transmitted again using the same procedure as described above.
On the other hand, if the count value exceeds the predetermined value N, this indicates that the lightwave signal corresponding to the input code has already been transmitted N times, so the transmission of the lightwave signal corresponding to the input code stored in the input code memory 5 is stopped. Stop.
In this way, the light wave signal corresponding to the input code is transmitted N times, but since the input code to be transmitted is the one stored in the input code memory 5, the information corresponding to the PIN code from the operation unit 3 is transmitted. You only need to enter it once. Further, by inputting the operation command signal only once, the input code is automatically transmitted N times, so it is only necessary to input the operation command signal once.

Note that the input code read from the input code memory 5 is output to the encoding circuit 7 and also to the display control circuit 8, and is displayed on the display section 9 under the control of the display control circuit 8. , the user can confirm whether or not he/she has correctly inputted the desired password code correspondence information.

Next, the operation of the electronic lock 2 will be explained. Light waves of various wavelengths are incident on the photodiode 16 as a light receiving element, but the resonant circuit 17 connected to the photodiode 16 resonates only with the frequency of the light wave transmitted from the light emitting diode 11. Since it is configured, the photodiode 16
selectively receives only light waves having the same frequency as the light waves transmitted from the light emitting diode 11. In this way, by providing the resonant circuit 17, the light emitting diode 1
By making it possible to receive only light waves having the same frequency as the light waves emitted from the electronic lock 1, it becomes difficult to maliciously open the electronic lock 2.

The light wave received by the photodiode 16 is converted into an electrical signal and outputted to the receiving circuit 18, amplified by the receiving circuit 18, and outputted to the decoding circuit 19 as a time-series analog signal. The decoding circuit 19 converts a time-series analog signal (fixed frequency intermittent signal) into a parallel signal of digital values of "0" and "1", codes it, and outputs it to the matching circuit 21 as a received code. Then,
The collation circuit 21 collates the received code inputted from the decoding circuit 19 with the PIN code pre-stored in the PIN code memory 20, and outputs a matching signal to the matching number counter 22 if they match. The match counter 22 counts the match signals output from the matching circuit 21 and outputs the count value to the control circuit 23. The control circuit 23 transmits the unlock command signal to the lock control circuit 23 only when the count value of the match counter 22 is N, that is, when the transmission signal corresponding to the PIN code has been transmitted from the electronic key N times. Output to. The lock control circuit 24 uses this unlocking command signal to drive an electromagnetic relay or the like (not shown) of the locking mechanism 25 to release the locking function and unlock the locking mechanism 25. In this way, by unlocking the lock mechanism 25 only when the PIN code and the received code match N times, the noise corresponding to the PIN code is accidentally received, and as a result, the noise corresponding to the PIN code is accidentally received. The danger of the electronic lock 2 being unlocked can be avoided.

The lock mechanism 25 also includes a password code memory 20.
When the same information as the PIN code information stored in advance is input from a predetermined input source (this is identified by matching the resonant frequency of the resonant circuit 17 and the oscillation frequency of the transmitting circuit 10) a predetermined number of times. The unlocking control is performed only when the unlocking is controlled, and before the unlocking is controlled, () the PIN code and the reception code match, () the resonant frequency matches the transmission frequency, and () the specified number of receptions N matches the number of transmissions. Since it is necessary to satisfy three conditions, security is dramatically improved compared to the conventional technology. Furthermore, since any code-compatible signal can be sent from the electronic key without contact, one electronic key can handle multiple electronic locks 2 with different password codes. Improves key management.

Note that the present invention is not limited to the above-described embodiments; for example, the signal corresponding to the PIN code exchanged between the electronic key and the electronic lock 2 may include not only light waves but also radio waves, ultrasonic waves, etc. A wave signal may also be used. Further, as the input code modulation method, not only the amplitude modulation method as in this embodiment, but also a frequency modulation method in which the frequency of the carrier wave is changed or a phase modulation method in which the phase of the carrier wave is changed may be adopted. Furthermore, the electronic key may be built into everyday items such as a small portable calculator, as well as an electronic wristwatch. Further, the transmission number counter 6 may output only a carry output signal, and the control circuit 4 may determine that a predetermined number of transmissions have been completed when the carry output signal is "1".

[Effects of the invention] As explained in detail above, according to the invention,
The lock is unlocked by transmitting a predetermined number of signals corresponding to the PIN code pre-stored in the lock's storage means from the key transmitting means built into everyday items such as wristwatches, making it easier to manage keys. Therefore, it is possible to realize an electronic key lock device that can improve safety and security of the lock.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Electronic watch, 2...Electronic lock, 3...Operation unit, 6...Transmission frequency counter, 10...Transmission circuit, 18...Reception circuit, 20...PIN code memory, 21...Verification circuit, 22... Match count counter, 23... Control circuit.

Claims (1)

[Claims for Utility Model Registration] An electronic key comprising a storage means for storing password information and a transmission means for contactlessly transmitting the password information stored in the storage means a predetermined number of times; Receiving means for receiving password information a predetermined number of times, detecting whether or not each of the predetermined number of password information received by the receiving means matches predetermined password information, and outputting a match signal each time they match. An electronic lock comprising: a verification means for counting the matching signals outputted from the verification means; a counting means for counting the coincidence signals outputted from the verification means; and a lock control means for unlocking the lock when the count value of the counting means reaches a predetermined value. Electronic key lock device.