| 摘要 |
PROBLEM TO BE SOLVED: To make it difficult to imitate a key and make it possible to set the key in an electric lock easily even in a dark place. SOLUTION: When a pushbutton switch of the key 6 is operated, an LED 13 for back light is lit to illuminate a front side of the key 6. When the key 6 is pressed against the electric lock 3, identification code is displayed in a liquid crystal display device 12 by QR code. An image of the QR code is formed in an image sensor 23 of the electric lock 3, and the electric lock 3 is locked or unlocked when the code obtained by reading the QR code whose image is formed in the image sensor 23 agrees with the code stored in advance. |
