| 摘要 |
PURPOSE:To increase the degree of security and to improve operability by a method wherein a wireless key is used and when locking and unlocking are carried out by means of coded information, coded information is updated each time locking and unlocking are effected. CONSTITUTION:During locking and unlocking, identification code information is read from an code memory part 16 by a microcomputer 2A through operation of an input switch 3A of a wireless key 1A and transmitted from a transmitting/receiving circuit 6A. In a controller 11A, coded information is received by a transmitting/receiving circuit 15A to transmit it to a microcomputer 18. The microcomputer 18 compares the coded information with coded information stored in a coded identification memory part 14A and when the two types of coded information coincide with each other, an electric lock 20 is locked and unlocked through the working of an output switch 19. Simultaneously, coded information is updated by the microcomputer 18 to transmit it to a key 1A to update coded information in the memory parts 16 and 14A. Further, an code data computing means is mounted on a key and may be used for comparison and collation of a computed value. This constitution receives and regenerates coded information to prevent approach and eliminates memory and the input of an identification code number. |
