JPS627346B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an unlocking key code signal generating means having a light source and a plurality of photodetecting elements for reading out a key code that is applied to a key to transmit or not transmit light; A collating means for collating the output signal of the unlocking key code signal generating means with a previously stored output signal of the locking key code signal generating means and transmitting an unlocking signal when they match; The present invention relates to an electrical locking device that operates to unlock the unlocking device based on an unlocking signal sent out. This locking device can be used by changing the key to a different key code as necessary by arbitrarily changing the memory contents of the locking key code signal generating means, and it is extremely difficult for a third party to unlock the lock. It will be difficult.

An object of the present invention is to make it possible to easily discover failures in the locking device as described above.

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

First of all, referring to FIG. 1 showing a locking device according to a first embodiment of the present invention, this locking device is roughly divided into an unlocking key code signal generating device 1 and a locking key code signal generating device 1 as shown surrounded by dotted lines. It consists of a key code signal generator 2, a verification circuit 3, an unlocking device 4, and a power supply circuit 5. Of these, the unlocking key code signal generating device 1 includes 16 photodetecting elements a ₁ , a ₂ , a ₃ ,
a ₄ , b ₁ , b ₂ , b ₃ , b ₄ , c ₁ , c ₂ , c ₃ , c ₄ , d ₁ , d ₂ ,
d ₃ and d ₄ are arranged in 4 rows and 4 columns, a resistor R is connected in series to each photodetector element, and one end of each resistor R is connected to the positive power supply line 6. Therefore, the photodetecting elements a ₁ to d ₄ output a high level, ie, "1", when receiving light, and output a low level, ie, "0", when not receiving light, in the form of a 16-bit binary digital signal. Generates a key code signal for unlocking. The presence or absence of light reception by the photodetecting elements _a1 to _d4 can be determined by interposing a key board 8 as shown in FIG. 2 between the light source lamp 7 and the 16 photodetecting elements _a1 to _d4 . will be determined.

The unlocking key code signal generator 1 will be described in more detail with reference to FIG. 2.
The light detection plate 9 and the light source lamp 7, in which a ₁ , to d ₄ are arranged in 4 rows and 4 columns, are fixed to an outdoor wall or door, and a key plate 8 is removably inserted between them. is configured to do so. Although not shown in the drawings, an opening for inserting the key plate 8 is provided in the wall or door, and a guide is provided to facilitate attachment and detachment of the key plate 8. The key board 8 also has addresses a1 _' to d4' in 4 rows and ₄ columns corresponding to the 16 photodetecting elements _a1 to _d4 of the photodetecting plate 9, and a portion corresponding to the selected photodetecting element. Only the light transmitting hole 10 is provided. This key board 8 has light transmitting holes 10 at six addresses a ₁ ′, a ₄ ′, b ₂ ′, c ₃ ′, d ₁ ′, and d ₃ ′ as shown in FIG.
is provided, and other addresses are blocked from transmitting light. Therefore, by creating the state shown in Figure 2,
Only the photodetecting elements a ₁ , a ₄ , b ₂ , c ₃ , d ₁ , and d ₃ receive light, and only these output lines become “1”, and 16
[1001010000101010] binary digital signals are obtained corresponding to the outputs of the photodetecting elements a ₁ to d ₄ . The switch 11 shown in FIG. 2 is activated when the key board 8 is inserted into a predetermined position for unlocking, and is used to start the unlocking operation, and is connected to the power terminal 12 as shown in FIG. has been done.

As is clear from FIG. 1, the locking key code signal generating device 2 includes an input device 13 for transmitting a locking key code signal in the form of a binary digital signal using a keyboard, and a second input device. a main memory 15 into which the output of the input device 13 or the output of the decoder 14 is input, a hold circuit 16 that temporarily stores the locking key code signal read from the main memory 15, and a switch. 11, and a line 18 for sending out a read end signal for the main memory 15.

As shown in FIG. 4, the decoding device 14 has 16 photodetecting elements a ₁ to d ₄ arranged in 4 rows and 4 columns, and a resistor R is connected in series to each photodetecting element. One end of is connected to the positive power supply line 19. In addition, the outputs of the 16 photodetecting elements a ₁ to d ₄ are sent to the buffer memory 2 via the respective buffer amplifiers 20.
1 is entered. A light source lamp 22a is also connected to the power supply line 19, and the light from this lamp 22a hits a selected one of the photodetectors a1 to d4 via the key board 8 shown in FIGS. ₂ and ₃ . It is configured as follows. In short, the photodetecting element a ₁ in Fig. 4
The decoder according to ~ _d4 is constructed in the same manner as the unlocking key code signal generating device 1 shown in FIGS. 1 and 2. Therefore, when the key board 8 to be used from now on is interposed between the lamp 22a and the photodetecting elements a ₁ to d ₄ , six photodetecting elements a ₁ , a ₄ , b ₂ , c ₃ , d ₁ , d ₃
is received, and an unlocking key code signal [1001010000101010], which is the same as the unlocking key code signal, is generated.
The data is written to the buffer memory 21. This decoding device 14 is also provided with a switch 22 that is turned on when the key board 8 is inserted, so the key board 8 is inserted between the lamp 22a and the photodetecting elements _a1 to _d4 for decoding. Power is supplied from the power supply terminal 23 to the power supply circuit 24 only when the power supply circuit 24 is inserted.
From a timing pulse generator 25 connected to
A read command signal for the buffer memory 21 and a reset signal for the main memory 15 are generated, and a read command signal for the main memory 15 is generated.
5, a write command signal is generated and the output of the buffer memory 21 is written to the main memory 15.

Referring again to FIG. 1, the verification circuit 3 will be explained as follows: a verification circuit 26 in row a, a verification circuit 27 in row b,
A collation circuit 28 on the c line and a collation circuit 29 on the d line are provided, and a 16-bit unlocking key code signal generated from the unlocking key code signal generator 1 and a locking key code signal generated from the locking key code signal generator 2 are provided. It is configured to compare the 16-bit locking key code signal. Although only the matching circuit 26 in row a is shown in detail in FIG. 1, the matching circuits 27 in other rows,
28 and 29 are similarly configured. In short 16
Sixteen comparison circuits are provided for the bits, each having the same configuration. Therefore, the photodetecting element a ₁
Only the comparison circuit for the output will be explained, and the explanation of other comparison circuits will be omitted. The output of the photodetecting element _a1 , which is the first bit signal of the 16-bit unlock key code signal, is input to the first AND gate 30, and the 16-bit lock signal is input to the first AND gate 30. The first bit signal of the key code signal is also input, and when both signals are "1", an output of "1" is generated on the output line 31 of the AND gate 30. Further, both signals are input to a second AND gate 34 via an inverter 32 and an inverter 33, respectively. Therefore, when both signals are "0", an output of "1" is generated from the second AND gate 34. In short, it is "1" only when the unlocking key code signal and the locking key code signal match.
The output is generated. The third AND gate 35 has
Since 16 comparison outputs corresponding to 16 bits are input, an output of "1" is obtained from the third AND gate 35 only when all 16 inputs are "1". Therefore, if even one bit does not match as a result of the comparison, the third AND gate 35 will not output "1".

The unlocking device 4 includes a fourth AND gate 36 to which the output of the third AND gate 35 and the signal of the memory read end signal line 18 are input;
It consists of a switch circuit 37 that is turned on in response to the output of the AND gate 36, and a plunger solenoid 38 that is energized when the switch circuit 37 is turned on. A convex lock piece 40 is attached to the plunger 39 which is sucked by the plunger solenoid 38.
are coupled and biased upward in FIG. 1 by a compression coil spring 41. A door 43 adjacent to a wall 42 in which a plunger 39 and a locking piece 40 are embedded has an engaging rod 4 movable left and right in FIG.
4 is attached, and the recess 4 of this engagement rod 44
A lock piece 40 is inserted into the hole 5. When the engaging rod 44 and the lock piece 40 are engaged as shown in FIG. 1, the engaging rod 44 is moved to the right by a handle (not shown) provided on the door 43, and 4
It is impossible to extract this from 2. That is, it is impossible to open the door 43. On the other hand, when the plunger solenoid 38 is energized and the plunger 39 and lock piece 40 move downward in FIG. The door 43 can now be opened.

Next, the handling method and operation of this locking device will be described.

When using this locking device, first, use the input device 13 or the decoding device 14 to input a locking key code signal that is the same as the unlocking key code signal that can be generated by the key board 8. main memory 15
write to. When using the input device 13, for example, a keyboard is used, and when using the decoding device 14, the light transmitting hole 10 of the key board 8 is
This is done by reading with the device shown in the figure. As a result, a binary digital signal of [1001010000101010] is written into the main memory 15 as a locking key code signal. Next, in order to perform mechanical locking, the key plate 8 is placed in front of the light detection plate 9 as shown in FIG.
That is, the key board 8 is inserted through a key board insertion slot provided outdoors, for example, on a wall near the door. This results in
The switch 11 is turned on, the power supply circuit 5 is activated, the respective circuits are energized, the lamp 7 is lit, and the read signal generation circuit 17 generates a memory read command signal. When the lamp 7 lights up, the six light detection elements a ₁ , a ₄ , b ₂ , c ₃ , d ₁ , d ₃ enter the light receiving state through the light transmission hole 10 of the key board 8, and the remaining light detection elements It becomes a non-light receiving state. Therefore, from the unlocking key code signal generator 1,
A digital signal of [1001010000101010] is generated. On the other hand, a locking key code signal is read out from the main memory 15. Then, the verification circuit 3 compares the unlocking key code signal and the locking key code signal. In this case, it is clear that both signals match, so all outputs corresponding to 16 bits become "1", and the third AND gate 35
An output of "1" is obtained from The output of the third AND gate 35 becomes the input of the fourth AND gate 36, and since the other input of the fourth AND gate 36 is also in the signal state of "1" indicating the end of memory reading, the fourth AND gate An output of "1" is obtained from the gate 36. As a result, the switch circuit 37 is turned on, the plunger solenoid 38 is energized, and the engagement rod 44 can be inserted into the lock hole 46. With the engagement rod 44 inserted, the key plate 8
When the switch 11 is taken out, the power supply circuit 5 becomes inactive, the plunger solenoid 38 is also deenergized, and the lock piece 40 enters the recess 45 of the engagement rod 44 by the force of the spring 41, locking it. state. As explained above, when the key board 8 is removed, the power is turned off and the plunger solenoid 38 is de-energized. However, even if the power is kept on, the 16 All of the photodetecting elements _a1 to _d4 enter the light receiving state, and the output signal of the unlocking key code signal generator 1 no longer matches the output signal of the memory 15, so the switch circuit 37 is turned off and the plunger solenoid 3 is turned off.
8 is also deenergized. In this device, the information stored in the memory 15 is of course retained even after mechanical locking.

When unlocking, the key plate 8 is placed side by side with the photodetector plate 9 as shown in FIG. 2 in the same way as when locking the door described above. As a result, the switch 11 is turned on, the unlocking key code signal [1001010000101010] is generated from the unlocking key code signal generator 1, and the locking key code signal with the same content is also generated from the memory 15. , a matching output is obtained from the matching circuit 3, and the switch circuit 37 is turned on. As a result, the plunger solenoid 38 is energized, the lock piece 40 comes out of the recess 45 of the engagement rod 44, and the engagement rod 44 can be pulled out from the lock hole 46.

In this device, even if a plate with the same external shape as the key plate 8 is inserted by mistake or intentionally, the verification circuit 3 will output an unlock output of "1" unless the light transmission holes 10 are in the same position. Does not occur. In this embodiment, since it is 16 bits, 2 ¹⁶ =65536 combinations are possible, and it is almost impossible to intentionally create the same unlocking key code signal.

In this locking device, the unlocking key code signal can be changed arbitrarily, so the locking key code signal and the unlocking key code signal are changed as necessary.

FIG. 5 shows a schematic usage pattern in which the above locking device is applied to a hotel.

A decoding device 14 and an addressing device 51 for specifying an address in a memory corresponding to the room number and storing the output signal of the decoding device 14 are installed in the front 50. Therefore, as shown by the arrow A, the room used by the customer is addressed by the addressing device 51, and the key code of any one of the plurality of key boards 8 is stored in the memory 15. This key board 8 is handed to the customer as indicated by arrow B. When the customer inserts the key plate 8 into the key insertion hole 52 of the room as shown by arrow C, the unlocking key code signal generator 1 is activated, but at the same time an address signal is generated and based on this The locking key code signal from the memory 15 is read. Then, the unlocking key code signal and the locking key code signal are collated by the verification circuit 3, and when they match, an unlocking signal is obtained, and the lock is thereby unlocked.

FIG. 6 shows an embodiment of the present invention for determining whether the correct key board has been used. This can detect, for example, that a guest in a hotel is mistakenly attempting to unlock the locking device of another person's room or is attempting to unlock the room using a duplicated key board.

As mentioned above, when the key board 8 is inserted into a predetermined position for unlocking, the switch 11 is closed, the key code on the key board is decoded, an unlocking key code signal is obtained, and the lock is read from the memory 15. The key code signal is read out and collated by the collation circuit 3. However, if the wrong key board 8 is inserted, an unlock signal cannot be obtained.
Therefore, the number of times the switch 11 is closed is counted by a counter 54 via a differential circuit 53. This counter 54 is reset when an unlocking signal is obtained from the verification circuit 3. or,
The counter 54 outputs an output signal when the switch 11 is closed five times or more. This output signal is supplied to one input terminal of the AND circuit 55. The output of the matching circuit 3 is supplied to the other input terminal of the AND circuit 55 via an inverter 56. This AND circuit 5
A light emitting diode 59 is connected to the output terminal of 5 through one input terminal of an OR circuit 57 and a switch circuit 58.
is connected. A buzzer 61 is connected to the output terminal of the OR circuit 57 via a switch circuit 60. These light emitting diodes 59 and buzzer 61
is installed at the front desk 50, and a diode 59 displays the room number.

Therefore, if the wrong key board 8 is replaced five or more times, an output signal is generated from the counter 54 and the AND circuit 5
At step 5, it is confirmed that no unlocking signal is generated, and the switch circuits 58 and 60 are made conductive, the buzzer 61 is activated, and the light emitting diode 59 is caused to emit light.
Therefore, the front side can detect that an accident has occurred with the locking device for that room. Subsequent actions are taken based on this detection. For example, start by photographing the door of the room with a television camera based on the detection signal and observing the situation.

The counter 54 is an AND circuit 5 when the switch 11 is closed twice or more and outputs an output signal.
5. The inverter 56 can be omitted. If a light emitting diode that operates simultaneously with the light emitting diode 59 is provided near the insertion hole of the key board 8, the operator can also be confirmed.

That is, according to the above, if the correct key is used, the lock can be unlocked immediately, but if an incorrect key is used due to an error or duplication, the lock will not be unlocked and will be detected, so there is no countermeasure for this. and treatment can be carried out quickly. This is particularly suitable for centrally managing a plurality of locking devices, and can be used, for example, not only in hotels but also in buildings with many offices. Further, by using a counter, incorrect replacements can be tolerated up to a predetermined number of times, making it suitable for practical use.

FIG. 7 shows an embodiment of the present invention in which the operating status of the locking device can be checked without using a key. The memory 15 stores a test key code signal in which all 16 bits are set to 1. This is not a signal suitable for unlocking using the key board 8 since the key board 8 has light transmitting holes 10 at all addresses _a1 ' to _d4 '. Therefore, it is excluded from the locking key code signal. 62 is a test key code signal discrimination circuit, and 63 is a switch circuit controlled by the output signal of the discrimination circuit 62. 64 and 65 are AND circuits connected to the output side of the matching circuit 3, and 66 is an inverter. 67 is a light emitting diode, which is turned on and off by a switch circuit 68. This switch circuit 68
is controlled on and off via an OR circuit 69 in synchronization with the output signal of the oscillation circuit 70. On the other hand, on/off control is also performed depending on the presence/absence of the output signal of the AND circuit 65.

In such a configuration, in order to confirm the operating state, a test key code signal is read from the memory 15 and supplied to the verification circuit 3. The determination circuit 62 determines and detects the presence of the test key code signal, and the output signal turns on the switch circuit 63 to turn on the power. The unlocking key code signal generator 1 includes a light source lamp 7 as shown in FIGS. 1 and 2 described above.
is lit. Since the key board 8 is not inserted, all of the photodetecting elements _a1 to _d4 are irradiated, and a key code signal with all 16 bits set to 1 is obtained.
Therefore, an unlocking signal is obtained from the verification circuit 3. However, since the output signal of the discrimination circuit 62 is supplied to the AND circuit 64 via the inverter 66, this unlocking signal cannot be obtained from the output of the AND circuit 64, and the unlocking device 4 is not activated. On the other hand, the unlocking signal is supplied to the AND circuit 65, but since there is an output signal from the discrimination circuit 62, an output is obtained from the AND circuit 64, turning on the switch circuit 68, and turning on the light emitting diode 67.
Continue to emit light.

In this case, if the light source lamp 7 does not light up due to a malfunction, if any of the light detection elements a ₁ to d ₄ does not operate even if it receives light, or if the light is blocked by dust, A match cannot be obtained from the verification result by the verification circuit 3. Therefore, no unlocking signal is obtained, and no output is obtained on the output side of the AND circuit 65. The switch circuit 68 turns on and off in response to the oscillation frequency of the oscillation circuit 70. Therefore, the light emitting diode 67 performs a blinking operation at a period corresponding to the above frequency. That is, the light emitting diode 6
If 7 is blinking, there is an accident, and if the light emitting diode continues to emit light, it is normal.

Therefore, it is possible to check whether the locking device operates correctly without using a key. This allows remote control. This is particularly suitable for centrally managing multiple locking devices, and is not limited to hotels, for example.
It can be used in buildings with many offices.

In the case of centralized control, a light emitting source is placed on the display surface in correspondence with the locking device, and the number, name, etc. of the locking device is associated with this, and it is selected whether to test simultaneously or individually, and the display screen is Check the flashing status of the light source.

Although a light emitting source was used to display the test results,
The present invention is not limited to this, and may also be a sounding body or other device capable of displaying confirmation.

Next, we will explain how to create a key each time it is used, mainly referring to FIGS. 8, 9, and 10.

The key board 8 is stored with a number corresponding to the number of the locking device in a state in which no light transmission hole is formed. For example, in the case of a hotel, a key board 8 with a room number attached at the front desk and without a light transmission hole is used.
Keep it. The locking key code signal generating device 2 has a light transmission hole forming device as shown in the cross-sectional view of FIG. 8 and the plan view of FIG. 9. Sixteen plungers 71 _{1 to 16} and solenoids 72 _{1 to 16} are arranged in four rows and four columns. Opposing this, there are 16 receiving holes 7
3 _1-16 are formed. Therefore, now key board 8
When, for example, the solenoid ₇₂₁ is energized while the plunger 721 is inserted, the plunger ₇₁₁ plunges into the receiving hole ₇₃₁ as shown by the chain line. At this time, a light transmitting hole 10 is formed in the key plate 8 at the address a ₁ ' shown in FIG.

Reference numeral 74 denotes a reading device for reading the room number attached to the key board 8 and converting it into an address signal. 75 ₁ to 75 ₁₆ are light emitting diodes arranged on the side surfaces of the receiving holes 73 ₁ to 73 ₁₆ , and 76 ₁ to 76 ₁₆ are phototransistors arranged on the side surfaces of the receiving holes 73 ₁ to 73 ₁₆ opposite thereto. Plunger 71
This is for determining whether or not the holes 73 ₁ to 73 ₁₆ have entered the receiving holes 73 ₁ to 73 ₁₆ .

In FIG. 10, 77 is a random signal generation circuit that generates a 16-bit binary digital signal, and 78
is a hold circuit, and when the key board 8 is inserted and the switch 22 is closed, a random signal generation circuit 77 is activated by a command signal from the timing pulse generation circuit 25 to generate an unpredictable binary digital signal. 79 _{1 to 16} are switch circuits, respectively.
80 and 81 are buffer memories, respectively, 82 is a verification circuit, 83 and 84 are AND circuits, 85 and 86 are switch circuits, respectively, 87 and 88 are light emitting diodes that emit green and red light, and 89 is a delay circuit.

The switch circuits 79 ₁ to 79 ₁₆ are controlled on and off based on the randomly generated binary digital signals, the solenoids 72 ₁ to 72 ₁₆ are energized and de-energized, and the plungers 71 ₁ to 71 ₁₆ are connected to the receiving hole 7.
3 ₁ to 73 ₁₆ entered and non-entered. Therefore, a light transmitting hole 10 is formed in the key board 8 at an address corresponding to the binary digital signal. This formation state is detected by phototransistors 76 ₁ to 76 ₁₆ that operate depending on whether or not the irradiated light from the light emitting diodes 75 ₁ to 75 ₁₆ is blocked by the plungers 71 ₁ to 71 ₁₆ , and this detection signal buffer memory 8
Store as 0. The output signals from the hold circuit 78 and the buffer memory 80 are supplied to a verification circuit 82 to determine whether or not they match. Meanwhile, the reading device 74 converts the number on the key board 8 into a reading address signal. Since it takes time to form light transmission holes in the key board 8, a read command for the buffer memory 80 is given via a delay circuit 89. The output of the collation circuit 82 writes the binary digital signal of the hold circuit 78 into the buffer memory 81, thereby controlling the read/write operation to the memory 15 shown in FIGS. 1 and 4.

This control is carried out by an AND circuit 83 that calculates the logical product of a signal indicating after the delay time set by the delay circuit 89, a signal indicating a match obtained from the matching circuit 82, and a signal indicating the end of the reading operation. The binary digital signal is sent to the memory 1 via the buffer memory 81 as a locking key code signal.
Write in 5. The write address to this memory 15 is designated by an address signal from the reader. At the same time, the switch circuit 85 is turned on to cause the light emitting diode 87 to emit light, and a green display is displayed to indicate normal operation.

If a signal indicating a match is not obtained as a result of the comparison, the AND circuit 84 turns on the switch circuit 86, causing the light emitting diode 88 to emit light and displaying a red display to indicate that there is an abnormality. On the other hand, the binary digital signal of the hold circuit 78 is not written into the memory 15 due to the output signal of the AND circuit 83.

As described above, a new locking key code signal is written into the memory 15. The key code signal is formed on the key board 8 each time. Therefore, the key board 8 can be used to unlock the door by the method described based on FIG. This key board 8
If the key board 8 is used, discard it and then buy a new key board 8.
If a new locking key code signal is set again using , it becomes impossible to unlock using any other key, for example, the previously used key board.

Note that the binary digital signal is obtained by the random signal generation circuit 77, but instead of this, for example, a keyboard may be used to obtain an arbitrary binary digital signal each time.
Various methods can be applied. Furthermore, in forming the light transmitting hole in the key plate 8, the light transmitting hole is not limited to being formed mechanically using a plunger, but also by using a key plate coated with a photosensitizing agent and exposing it to light to form the light transmitting hole. Chemical treatment may also be used. Furthermore, although the number on the key board is attached in advance and read and used as an address designation signal, it is also possible to use a method in which the number is attached to the key board using an ordinary printing machine based on the address designation.

If the newly set locking key code signal has been used previously, it must be removed. This is because it allows unlocking with the previously used key board. Therefore, the structure shown by the imaginary line in FIG. 10 is used to eliminate such interference.

This reads the binary digital signal obtained from the random signal generation circuit 77 from the buffer memory 81 to the collation circuit 90. On the other hand, the locking key code signal written in the memory 15 by the address specification by the reading device 74 is read out to the verification circuit 90, and the two are verified. If they do not match, the solenoids 72 ₁ to 72 ₁₆ and the switch circuit are read out. 79 ₁ ~ 79
₁₆ etc. is supplied through a power supply circuit 91. If the comparison results in a match, the power supply circuit 91 stops the power supply, and the random signal generation circuit 77 generates a new binary digital signal via the timing pulse generation circuit 25 again.

This completely eliminates the possibility of unlocking using a previously used key board. It is also possible to check the locking key code signals of all other locking devices. It is also possible to perform a comparison with that of a locking device within a specific range. This is made possible by addressing. Therefore, one key board cannot unlock all or more than one locking device in a specific area of the building, resulting in an extremely highly secure locking device.

In the present invention, the locking device may be unlocked using two or more keys. For example, in a hotel, if two people use one room and both have the key, two people will stay on the first day and one person will stay on the second day, so one person will stay for one night and the other person will stay for two nights. There are times when I do. At this time, if both parties use a common key, if one person takes the key home, the room can be unlocked on the second day when the other person is staying. Furthermore, even if one of the keys is lost, the room can be unlocked using the retrieved key.

In this case, each time you need to change the key used by another person to a new one, as mentioned above, it is a hassle, and if this change is delayed, the lock will be unlocked unnecessarily as described above. There is a risk that

Therefore, as shown in FIG. 11, a memory 15 having a plurality of addresses is formed for one locking device. 1a to 1z are unlocking key code signal generators, 3a to 3z are verification circuits, and _4a to _4z are unlocking devices, respectively _. …mm ₁ , mm ₂ , mm ₃ …
Three addresses are provided: zm ₁ , zm ₂ , and zm ₃ . 92,
93 are address circuits, 94 are address signal generation circuits, as ₁ , as ₂ , as ₃ ... ms 1 , ms ₂ , ms ₃ ... zs _{1 ,}
zs ₂ and zs ₃ are address switches, respectively.

Now, when two people use room a of the unlocking device 4a, they each send a different locking key code signal to the address am ₁ ,
am memorized at ₂ . This is an address switch
By addressing by operating as ₁ and as ₂ . The locking key code signal generating device 4 is the same as that described above, and its explanation will be omitted. On the other hand, for addressing, instead of using a switch as in this embodiment, a method of reading out the number on the key board may be used. Address am ₃ is for use as a master key.

When unlocking, a key code signal is obtained from an unlocking key code signal generator using a predetermined key board 8 and is supplied to the verification circuit 3a, and an address signal for room a is supplied to the address circuit 92. The address circuit 92 sequentially reads locking key code signals at addresses am ₁ , am ₂ , and am ₃ and supplies them to the verification circuit 3a. In the case of a master key, a match is obtained with the locking key code signal of address _AM3 . Keyboard 8 has address am ₁ ,
A match is obtained with the key code signal for locking on either side of am ₂ . Here, if it is desired to discontinue use of the key board 8 corresponding to address _am1 , the locking key code signal can be changed to a new one or deleted. As a result, the key board 8 corresponding to the address _am2 can be used continuously without any changes.

Although various embodiments of the present invention have been described above,
Although the objects and effects of the present invention can be obtained by applying the present invention even if there is only a single locking device, as shown in Fig. 12, buildings with multiple locking devices If you like, hotel reception,
Further effects can be obtained when performing centralized control in a place such as a security room in a building.

That is, there is a lock mechanism corresponding to rooms 95 ₁₁ to 95 _1z on the first floor of the building, and a lock mechanism corresponding to rooms 95 ₂₁ to 95 on the second floor.
5 There is a locking mechanism corresponding to room _2z , and...
If a locking mechanism for rooms of 95 _o1 to 95 _oz is present on the floor, each locking mechanism is equipped with a central control device 96 including a memory to which the various embodiments of the present invention described above are applied, installed at the front desk, security room, etc. . Then, these are connected by a single common conducting wire, and each control is performed by time-division control. 97 is a decoding device or a setting device for setting a locking key code signal.

Similarly, the above-mentioned time-division control is applied to detecting erroneous operation of each locking device, checking whether it is operating normally, etc. using the above-mentioned single conductor using conventionally known means. Good too.

According to these time division controls, all the functions of the present invention can be satisfied with a minimum number of single conductive wires, which is extremely suitable in terms of construction and cost.

According to the present invention described above, the blocking means is configured with the AND circuit 64, but various other configurations may be used, such as cutting off the power to the unlocking device 4 based on the output signal of the discriminating circuit 62. can be taken.

Further, although the memory 15 is used as a means for generating the test key code signal, all of the verification circuits 3 may be directly set to the light transmitting state. Furthermore, the discrimination circuit 62 can take other methods, such as operating based on the fact that all of the collation circuits 3 are set to the light transmitting state.

As described above, according to the present invention, there is an effect that malfunctions in light sources, photodetecting elements, etc., which cannot be confirmed from the outside, can be detected normally. This is because, especially in a device that has a structure that determines whether an incorrect key has been used, it is important that the locking device is easily checked for its normal state, and the present invention is sufficient for this purpose. A satisfactory device can be obtained.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of a locking device according to each embodiment of the present invention, Figure 2 is a perspective view of an unlocking key code signal generator, Figure 3 is a plan view of a key plate, and Figure 4 is a diagram of a locking device according to each embodiment of the present invention. A circuit diagram of the decoding device, FIG. 5 is a perspective view showing the usage mode when the locking device of the present invention is applied to a hotel, and FIG. 6 is an embodiment for confirming whether the usage state of the present invention is correct or not. 7 is a block diagram showing an embodiment for confirming the operation of the locking device according to the present invention, and FIG. 8 is a block diagram showing an embodiment of the device for creating a new key according to the present invention. 9 is a plan view thereof, FIG. 10 is a block diagram thereof, FIG. 11 is a block diagram showing an embodiment in which a plurality of keys are used in the locking device of the present invention, and FIG. 12 is a diagram illustrating the above-mentioned book. FIG. 2 is a block diagram showing an embodiment in which the invention is integrated to centrally manage a plurality of locking mechanisms. 1... Key code signal generator for decoding, 2... Key code signal generator for locking, 3... Verification circuit, 4...
Locking device, 8...key board, 14...decoding device, 15...
Memory, 59...Light emitting diode.

Claims (1)

[Scope of Claims] 1. An unlocking key code signal generating means having a light source and a plurality of photodetecting elements for reading out a key code that is applied to a key to transmit or non-transmit light; a collation means for collating the output signal of the key code signal generation means with the output signal of the locking key code signal generation means stored in advance and transmitting an unlocking signal when they match; In a locking device that operates to unlock the unlocking device by an unlocking signal, a discriminating means for determining that a test key code signal whose key code is transmission of light has been issued during a test. , a display means for displaying a result of comparing the test key code signal with the output signal of the unlocking key code signal means by the checking means; and a blocking means for preventing operation by an unlocking signal.