JPS615178A - Unlocking method and apparatus utilizing magnet - 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 unlocking method using a magnet for unlocking a door locking device of a hospital room, a hotel, etc., and a device thereof.

"Prior Art" In recent years, a method of unlocking a lock using a magnetic card coated with a magnetic material has come to be used.

In this unlocking method, a read control circuit uses a magnetic head to unlock the door. However, since the magnetic head is used to read the unlock code Kl of the magnetic card, not only is the circuit configuration of the magnetic head complicated, but if the magnetic card is inadvertently brought close to a strong magnet, the code written on the magnetic card may be read. There is a disadvantage that the lock code is demagnetized,
Moreover, the reading device has a hole for receiving a magnetic card, and children often stuff the hole with foreign objects and block it, rendering it unusable.

In order to solve this problem, a lock as disclosed in Japanese Patent Application Laid-Open No. 49-135800 has been proposed. This lock is in the form of a card with many magnets embedded as a key, and has the advantage that the unlock code on the case will not be demagnetized even if the key is inadvertently brought close to a strong magnetism. A reed switch is used for the sensor that reads the code, and since the reed switch is a mechanical opening/closing contact, not only is there a problem with durability, but the unlock code cannot be read depending on the arrangement position or connection state of the reed switch. Therefore, in order to set a unique unlock code for each key, sensors and control devices must be individually manufactured to correspond to the dedicated key, making it extremely cumbersome. Moreover,
It is extremely difficult to produce a master key for unlocking multiple locking devices t' with one key. Furthermore,
The key card is inserted into the hole of the sensor and brought into contact with or very close to the reed switch of the magnetic If sensor of the key card, thereby opening and closing the reed switch, so it is the same as above. There have been cases where children have stuffed foreign objects into the sensor holes and blocked them.

``Problems to be Solved by the Invention'' The present invention was created in view of the above circumstances, and uses a sensor that reads the unlock code of a key card equipped with an appropriate number of magnets to detect all possible unlocks. Since the holes I and 0 (Integrated Oircu ports) are arranged according to the code, there is no need to manufacture sensors individually according to the unlock code, and they can be used in common. Setting the code can be done by a simple method and means of simply opening and closing a large number of switches, and the control device can be used in common regardless of the unlock code, with one control device. Extremely convenient for production,
In addition, the present invention provides an unlocking method and device using a magnet that requires only pressing the key card against the sensor and does not have an insertion hole, so that there is no possibility that a child or the like will stuff foreign objects into the insertion hole and block it. be.

[Means to be Solved by the Invention] In order to achieve the above-mentioned object, the present invention presses a 1m card, on which an unlock code is formed by an arrangement of an appropriate number of magnets, against a sensor consisting of a large number of holes I and O. , the sensor detects the unlock code of the health card, compares the detected unlock code of the key card with a setting code determined in advance by opening and closing a large number of switches, and when the unlock code and the setting code match. Locking device ff k Unlocking method using magnets operated to unlock and an appropriate number of magnets Optional 1: A key card on which an unlocking code is formed by being arranged, a key card that is pressed against the key, and a key It has a sensor in which holes I and O are arranged to correspond to all the unlocking codes that the card can take, and a comparison circuit is all connected to the sensor, and the comparison circuit can be opened and closed arbitrarily to determine the setting code. connect a large number of switches,
A locking device f (
It is characterized by an unlocking device that uses a magnet connected to the r.

``Example'' Hereinafter, an example of an unlocking method using a magnet and an apparatus thereof according to the present invention will be described based on all the drawings. In FIG. 1, 1 is a key card containing an appropriate number of disc-shaped magnets, 2 is a sensor embedded in the wall 31 near the door 30, and 6. As shown in the figure, an appropriate number of magnets 4 are housed in a case 3 made of synthetic resin, particularly stainless steel or aluminum, which is the most suitable material. An inner body 6 is provided inside. The storage inner body 6 is preferably formed of a ferromagnetic material having a magnetic magnetic effect so that the magnetic force of each magnet 4 does not spread in all directions and affect holes I and O other than those specified.

The arrangement of the magnets 4 incorporated into the storage inner body 6 consists of a dedicated key part 7 and a master key part 8, and a key card 1.
When using as a dedicated key, set 5 to part 7 of the dedicated key.
In addition, two magnets 4 are incorporated in the master key part 8 at array positions corresponding to the unlock codes. On the other hand, when the key card 1 is used as a master key, two magnets 4 in the unlocking code and one magnet 4 in another arrangement position are incorporated in the master key part 8. . In other words, the dedicated key has an appropriate number of magnets 4 arranged in a predetermined arrangement to form an unlocking code corresponding to each locking device, and unlocks only the locking device attached to a specific door 30. The magnets 4 may be arranged so that an unlocking code can be formed as a dedicated key only in the dedicated key part 7 without using the master key part 8. Also, the master key can unlock all the locking devices of the door 30, and the master key part 8
In addition to forming the unlocking code for the master key by using only the keys, it is also possible to form the unlocking code by combining one of the rows of the dedicated keys 7. The case 3 is made of a non-magnetic material, for example, the unlock codes for the dedicated key and master key are made of opaque synthetic resin so that they cannot be seen from the outside, and are made of hard synthetic resin to have strength so that they cannot be easily destroyed. Made of resin, it is lightweight and thin for easy portability.
Particularly suitable are stainless steel and aluminum. When the storage inner body 6 is made of synthetic resin, the magnet 4 is arranged so that the magnetic force is directed toward one side of the case 3, that is, the side that is pressed against the sensor 2.
It is assembled into the storage inner body 6 by being fitted onto a dish-shaped ferromagnetic plate 9.

Sensor 2 is installed in case 1 as shown in FIGS. 4 and 5.
0 has a storage inner body 11, and the storage inner body 11 has a large number of recesses 12 formed corresponding to all possible arrangements of the magnets 4 of the key card 1. Hole I, 013 is fitted regardless of the unlocking code of the dedicated key and the unlocking code of the master key. It is preferable that the storage inner body 11 is also made of a ferromagnetic material like the storage inner body 6. Dedicated key part 7α and master key part 8 also for the sensor
It has α. The hole I, 013 is well known and has eight surfaces 13α and eight surfaces 13b as shown in FIG.
When connecting 4゜16 through a resistor, the terminal 15゜1
6, a DC voltage of approximately the same value as the DC voltage applied between the terminals 14 and 15 is output. In this state,
When the magnetic field of the N pole of the magnet 4 is applied in the direction from the N surface 13α to the 8 surface 13b, the output voltage between the terminals 15 and 16 becomes zero, and the magnetic field must be weakened to a predetermined value or less, or the effect of the magnetic field will be reduced. As described above, a DC voltage is output between the terminals 15 and 16. Hall I, 013, 8th side 13α to 8
Even if the magnetic field of the S pole of the magnet 4 is applied to the surface 136, the DC voltage remains output between the terminals 15 and 16, and has the property of not changing in any way. The hall I, 01
One bias magnet 17 is inserted into the concave portion 12 below 3. The direction of the magnetic field lines of the bias magnet 17 is such that, for example, the N pole is the hole I, and the 8th surface 13α of 013 is the N pole.
8 in the direction of the surface 13b, or the south pole is the hole I,
The magnetic force is applied in the direction from the 8th surface 13b of 013 to the 8th surface 13α, and has a magnetic force that does not cause a DC voltage to not be output between the hole I and the terminals 15 and 16 of 013. A ferromagnetic plate 18 is fitted into the recess 12 below the bias magnet 17 so that the direction of the magnetic force lines of the bias magnet 17 is directed toward the holes I and 013. The ferromagnetic plate 18 is not limited to a plate shape, but can also be formed into a dish-like shape, and the holes I and 013 and the bias magnet 17 may be fitted therein in an overlapping manner.

Each hole I of exclusive key part 7α and master key part 8a,
0 is connected to comparison circuits 19-22, as shown in FIG. The comparator circuit 19 receives a detection signal from the hole I, 013 of the master key part 8α.

Comparing circuits 20 to 22 are provided corresponding to each row of holes I, 013 arranged in the dedicated key part 7α, and are adapted to receive detection signals from holes I, 013 in each row.

Each of the comparison circuits 19 to 22 has a corresponding hole I, 01.
Switches 8W1 to 8W2 are connected in correspondence with the number 3. Each of the comparison circuits 20 to 22 operates in accordance with the comparison value.

A gate circuit 23 is connected to the output terminal of the comparison circuit 22,
A drive circuit 24 and a play timer 35 are connected to the gate circuit 23.
A locking device 2 consisting of a plunger solenoid, etc.
5 is connected.

The play timer 35 is designed to provide a delay time of about 1 to 2 seconds when the locking device 25 is unlocked by the output signal from the drive circuit 24 to prevent mischief by children or chattering. It is.

Note that the key card 1 and the sensor 2 each have a positioning magnet 26α that can be freely attracted to the key card 1 and the sensor 2.

26b is buried. Moreover, in FIG. 7, the bird is a current limiting resistor.

In addition, in Figure 7 (2), the master key part 8α is 4 digits and 6
The code for the digit can be selected using a changeover switch 36.

``Function'' As shown in Figures 2 and 4, the arrangement of the dedicated key part 7 is
Assuming that there are 2 positions and the magnets 4 are placed at five appropriate positions among these 12 positions as shown in FIG. 2, the arrangement method is 120. = 792 possible ways. In addition, the N surface 13α and the 8 surface 1 of the hole I, 013
When used in combination with 36, the combination of N pole and 8 pole of magnet 4 acting on holes I and 013 is 2.
' = 32 combinations are possible, and if all 5 of these are for the north pole and 2 ways for the south pole are excluded, 30 combinations, a total of 92 x 30 = 2a760 combinations, that is, unlock codes can be formed.

On the other hand, the master key part 8 has an arrangement of 6 positions,
If three magnets 4 are placed in these 6 positions, 60. = 20 combinations are possible, and as mentioned above, there are 23 = 8 combinations of the N pole and 8 pole of magnet 4,
Similarly to the above, except for the two arrangements in which the three magnets 4 have the same polarity, there are six arrangements, and therefore a total of 20X
6=120 different unlock codes are possible.

By the way, in this embodiment, it is assumed that the master key part 8 forms the unlock code for the master key, and the unlock code for the dedicated key is formed by two of the three magnets 4 of the master key part 8, It is formed by five magnets 4 of a dedicated key part 7. That is, instead of one magnet 4 of the master key part 8, five magnets 4 of the dedicated key part 7 are used to form the unlock code. Therefore, a total of 120 x 23.760 ways for the exclusive key part and 120 ways for the master key part 8
23.760=g85L200 ways are possible, and in addition, the 5 magnets 4 of the special key part 7 are connected to the master key part 8 of 3.
Depending on which one of the magnets 4 is associated with one of the magnets 4, three combinations can be considered, resulting in a total of 23,760×3×120=8,553,600 unlocking codes. Moreover, the arrangement shapes of the magnets 4 and holes I, 013 are not limited to those shown in FIGS. Various kinds of unlocking codes can be adopted, and therefore, the number of possible unlocking codes increases further and becomes almost infinite. Also, the dedicated key part 7
Except for cases in which the magnets 4 of the master key part 8 face the same pole, when another large magnet is applied to the entire surface of the sensor 2, other holes I, 013 as well as other holes will respond to the unlock code. This is to prevent the hole I, 013 from being unlocked by also operating the hole I, 013. When another large magnet is applied to the sensor 2, the hole I, 0 corresponding to the unlock code is
13 When the holes I and 0 other than 1 operate, the comparator circuit 2
If you configure the circuit so that 0 to 22 do not output and the lock does not work, the polarity of the magnet 4 of the key card 1 should be in the same direction, and the surfaces of holes I and 013 of the sensor 2 should also be the same. You can also use it with the orientation of .

For example, in the position shown by the solid line in FIG.
-Incorporate it and set the unlock code for the dedicated key as shown below.

Therefore, the unlock code of the dedicated key is 524A in hexadecimal notation. On the other hand, the switches SW1 to SW are opened and closed, and the binary code is set to 001010, that is, the switch s
w,, sw, are closed, and the other switches S Wl, 8
w,, 8 W□5Wll is opened, 5 in hexadecimal
Set to . Dedicated key part 7 - corresponding switch SW
,~SW1. s wa, s wl,.

Close s w, Il, s w, , and leave the other switches open and set 24A in hexadecimal.

Therefore, each switch s w, −s w, , 16
It is set as 524A in base notation. And, as mentioned above, 52
When the key card 1 on which 4A and the unlock code are formed is pressed against the sensor 2 embedded in the wall near the door 30, the magnet 26α for positioning the key card 1 will move against the sensor 2.
The key card 1 is attracted to the positioning magnet 26b and positioned with respect to the sensor 2, and at the same time the key card 1
The magnetic force of each magnet 4 is the hole I, 01 of the sensor 2.
It acts on 3. The magnetic force of the bias magnet 17 acts on the hole I, 013 in advance, and the magnetic force of the magnet 4 acts synergistically with the magnetic force of the bias magnet 17, so that the magnet 4 and the hole I, 013
Even if the substantial gap between the hole I and the hole I, 013 is wide, the magnetic force of the magnet 4 acting on the hole I, 013 is demagnetized, and the magnetic force of the magnet 4 is weak, the hole I, 013 is operated.

From the sensor 2, an unlocking signal corresponding to the unlocking code 524A (hexadecimal) is inputted to the comparing circuits 19-22, and the respective switches SW1-SW.

In this case, the unlock code 524A (hexadecimal) and the setting code 524 are compared with the setting code 524A (hexadecimal).
Since A (hexadecimal system) matches, the comparison circuit 19~
A signal is supplied from 22 to the gate circuit 23. The gate circuit 23 receives the output signals from the comparison circuits 19 to 22 and unlocks the locking device 125 via the drive circuit 24. To explain the operation of the gate circuit 23 in more detail using the equivalent circuit shown in FIG.
7, the other one is ORed through the inverter 28'tl-
It is input to the circuit 29. The five matching signals of the dedicated key part 7α are inputted to the OR circuit 29 via the NAND circuit 30. That is, one of the three matching signals of the master key part 8α is replaced with the five matching signals of the dedicated key part 7α. Therefore, NANDl path 2
The output of 7 is input to the NAND circuit 31, and the output of the NAND circuit 30 is input to the AND circuit 31 via the OR circuit 29.The output of the AND circuit 31 operates the drive circuit 24, and the play timer 35t is input. - The intermediary locking device 25 unlocks the lock. If the unlock code formed by the magnet 4 of the key card 1 is, for example, 432B (hexadecimal) and does not match the code 524A (hexadecimal) set by the switches SW, ~SWl, teeth,
No signals are output from the comparison circuits 19 to 22, and the locking system [
125 does not unlock.

The master key is, for example, master key part 8 of key card 1.
Then, by using the arrangement of the two magnets 4 that are part of the master key used as the unlock code as the dedicated key, set the magnet 4 to 001011 in binary code and 6 in hexadecimal. Arrange. On the other hand, switches SW1 to SW6 are opened and closed to form an unlock code as a dedicated key.
Further, SW6 is also closed and the setting code 'e6 (hexadecimal) of the master key part 8α is set. Then, when the key card 1 for the master key is pressed against each sensor 2, the hole I, 013 of the sensor 2 detects the unlock code of the key card 1 as 6, and the comparison circuit 19 compares it with the set code 6. Then, each locking device 25 is unlocked. In this case as well, in addition to the master key part 8, the magnets 4 arranged on any of the dedicated key parts 7 can also be used to form the unlock code for the master key.

As shown in FIG. 9, a specific dedicated key card IC 2 first unlocks the first locking device [t32], and then using the same dedicated key card 1 to unlock a specific locking device among the second locking devices 33a to 33g. When used as a reverse master key to unlock only things, among the matching signal lines of the first locking device shown in Figure 8, 8α-1, 8α-2 and 7a-1 to 7a-5. If necessary, for example, 7α-1 and 7α-3, or 7α-2, 7α-3, and 7α-4 can be connected to each other and have a common C2. Any of the key cards 1 can unlock the first locking device 32.

"Effects of the Invention" As described above, according to the unlocking method using magnets and its device according to the present invention, all available sensors are used to read the unlocking code of a key card on which an appropriate number of magnets are arranged. Since the holes I and O (i7) are arranged in correspondence with the unlocking code, there is no need to manufacture individual sensors according to the unlocking code, and they can be used in common. Not only can the code be set using a simple table method and means that only opens and closes a large number of switches, but the control device is also one and can be used in common regardless of whether it is an unlock code or a setting code. It is extremely convenient to manufacture, and since it is sufficient to simply press the key card against the sensor and does not have an insertion hole, there is no possibility of children or the like blocking the insertion hole with foreign objects.

[Brief explanation of drawings]

The drawings show an embodiment of the unlocking method using a magnet and its device according to the present invention; FIG. 1 is an overall perspective view of the device, FIG. Figure 3 is a sectional view of the main parts of the key card, Figure 4 is a plan view with the top plate of the sensor omitted, Figure 5 is a sectional view of the main parts of the sensor, Figure 6 is a perspective view of holes I and O, and Figure 7 is a sectional view of the main parts of the key card. The figure is an electronic circuit diagram of the unlocking device, FIG. 8 is an isometric circuit diagram of a comparison circuit and a gate circuit, and FIG. 9 is an explanatory diagram for explaining the configuration of a reverse master key. 1... Key card 2... Sensor 3... Synthetic resin case 4... Magnet 5... Recessed part
6, 11...Storage inner body 7.7α...Special key part 8,8α...Master key part 9.18...Ferromagnetic plate 10...Case 12...Concave part 13・・・
・Hole I, 013a...N surface 13b...8 surface 14-16...Terminal 17...Bias magnet 19-22...Comparison circuit 23...Gate circuit 24...Drive Circuits 25, 32, 33α~33
n... Locking devices 26a, 26b... Positioning magnet 30... Door 31.
...Wall SW1~SW,1...Switch TL,...Resistance patent applicant Tokyo Magnet Applied Products Co., Ltd. (1 other person) 2nd cause 3rd figure 6 -

Claims (2)

[Claims] (1) A key card on which an unlock code is formed by an arrangement of an appropriate number of magnets is pressed against a sensor consisting of a large number of hole IOs, and the sensor detects the unlock code on the key card, and the detected key card The unlocking code using a magnet is characterized in that the unlocking code is compared with a setting code predetermined by opening and closing a large number of switches, and the locking device is unlocked only when the unlocking code and the setting code match. Method. (2) A key card in which an appropriate number of magnets are arbitrarily arranged to form an unlock code, and a hole I which the key card is pressed against and corresponds to all possible unlock codes on the key card. , O is arranged, a comparison circuit is connected to the sensor, and a number of switches which are arbitrarily opened and closed are connected to the comparison circuit to determine the setting sign, and the output terminal of the comparison circuit is connected to a drive circuit. An unlocking device using a magnet, characterized in that it is connected to a locking device via a circuit.