| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a protection device of a cylinder lock which can improve operability by performing the blocking operation of a shutter by biasing force of a biasing unit and can improve operability at unlocking by easily unlocking the shutter at a blocking position while inhibiting misconduct. <P>SOLUTION: The blocking operation of the shutter 3 is performed by biasing force of a torsion spring 4, and an unlocking device 5 includes a transponder 14 which can send an authentication code peculiar to a vehicle, an antenna 15 which can receive the authentication code in a non-contact manner by bringing the transponder 14 close to the antenna, and an authenticating device 16 which authenticates whether the authentication code received by the antenna 15 is regular or not. Only when the authenticating device 16 authenticates that a regular authentication code is received, lock is released by a solenoid 9 to allow the shutter 3 at the blocking position to move to an opening position. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
