JPH051353B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a card-based lock system, and more particularly to a card unlock system for unlocking a lock using a plurality of cards.

(b) Prior art and its disadvantages In the conventional card-based unlocking system, when a card is inserted into a card reader and the data on this card matches the unlocking data on the lock side,
Since the lock is released, if the cardholder loses the card, there is a risk that the card will be unlocked by the finder. Furthermore, in places where a high level of security and safety is required, such as hazardous materials warehouses, laboratories, and aircraft, problems may arise if the lock is released at the sole will of one cardholder. .

(c) Object of the Invention In view of the above-mentioned drawbacks, it is an object of the present invention to provide a card unlocking system in which the lock cannot be released unless the data of a plurality of cards are combined.

(d) Structure of the Invention The present invention includes a lock mechanism, a storage means for storing a key number which is data for releasing the locked state of the lock mechanism, and a storage means for storing the lock data which is a part of the key number. a plurality of cards, a card reader for reading these cards, a synthesizing means for synthesizing a key number from lock data read by the card reader, and a synthesizing means for synthesizing a key number from the lock data read by the card reader, and storing the synthesized key number in the storage means. The present invention is characterized by comprising a comparing means for comparing the two key numbers with the existing key number, and an unlocking means for releasing the locked state of the locking mechanism when the comparing means confirms that the two key numbers match.

(e) Embodiment FIG. 1 is a structural diagram of a main part of a card lock release system which is an embodiment of the present invention. In this card unlocking system, unlocking is performed using two cards. A locking mechanism 6 is embedded in a wall 8 on the opening/closing side of the door 7 to be locked. This lock mechanism 6 is composed of a solenoid 6a and a lever 6b. A control device 4 for driving this locking mechanism 6 is attached to the wall surface of the wall 8.
A card reader 3 and a buzzer 5 are installed on the outer surface of the control device 4. When releasing the locked state of the lock mechanism, the cards 1 and 2 having magnetic stripes are scanned by the card reader 3.

A part of the key number (lock data), which is data for unlocking, is stored in the cards 1 and 2. For example, if the key number is "245731", the lock data for cards 1 and 2 may be set to "245" and "731", respectively. In addition to dividing into high-order digits and low-order digits as shown above,
Dividing into every other digit, divisor and quotient of division, etc. are possible.

FIG. 2 is a block diagram of the above embodiment.
The CPU 10 has a storage area MA for the key number.
RAM9 including: ROM that stores programs, etc.
12, interface 11 is connected.
A card reader 3, a buzzer 5, and a lock mechanism 6 are connected to the interface 11. The area MA corresponds to the storage means of the present invention.

FIG. 3 is a flowchart showing the operation of the above embodiment. Step n1 (hereinafter simply referred to as step ni)
Call it ni. ), card 1 is scanned and n2
The data on this card 1 is then read by the card reader 3. After this reading, this card 1 is taken out (n3). At n4, card 2 is scanned, and at n5, after the data on this card 2 is read, this card 2 is taken out.
(n6). At n7, the data read at n2 and n5 are combined to create a key number. In n8
The key number stored in RAM9 and n7
Compare with the key number synthesized by . If these key numbers match, proceed to n9 and release the lock; if they do not match, proceed to n10, sound the buzzer and stop. n7, n8, n9
correspond to the synthesis means, comparison means, and unlocking means of this invention, respectively.

When using the card unlocking system configured as described above, the key number required for unlocking cannot be reproduced unless two cards are scanned by a card reader and their data is combined. Therefore, if these two cards are held by multiple people, the lock cannot be released by the will of a single card holder. It can also be safely used in places that require a high level of security and safety, such as hazardous materials warehouses, laboratories, and aircraft. In addition, even if one of the cards is lost, it cannot be unlocked without the other cards, so there is no risk of the card being unlocked by someone who finds the lost card, making it extremely safe. be.

[Brief explanation of drawings]

FIG. 1 is a structural diagram of a main part of a card unlocking system according to an embodiment of the present invention, FIG. 2 is a block diagram of the above embodiment, and FIG. 3 is a flowchart showing the operation of the above embodiment. 1, 2...Card, 3...Card reader, 6...
...Lock mechanism, 9...RAM.

Claims (1)

[Claims] 1. A lock mechanism, a storage means for storing a key number which is data for releasing the locked state of this lock mechanism, a plurality of cards storing lock data which is a part of the key number, and A card reader that reads the card,
a synthesis means for synthesizing a key number from the lock data read by the card reader; a comparison means for comparing the synthesized key number with a key number stored in the storage means; A card unlocking system comprising an unlocking means for releasing the locked state of the locking mechanism when it is confirmed that the two key numbers match.