To provide a protection device for a cylinder lock capable of improving ease of the operation for releasing locking of a shutter at a closed position to release locking easily and smoothly, setting a long distance for communication between a transmitting means and a receiving means, and improving ease of the operation for authentication.
This protection device for the cylinder lock is provided with the shutter 2, a solenoid for locking the shutter 2 at the closed position, a transponder, an antenna 7 capable of receiving an authentication code, and an authenticating means for authenticating whether the authentication code is normal or not. This protection device releases locking by the solenoid only when receiving the normal authentication code and can move the shutter 2 up to an opened position. The antenna 7 is arranged separately outside a housing 1 and can be attached to an optional position in a vehicle.
SAWAKI YUSUKE
SUZUKI MICHIYUKI
| JP2005194729A | 2005-07-21 | |||
| JP3840375B2 | 2006-11-01 | |||
| JP2006199168A | 2006-08-03 | |||
| JP2004314806A | 2004-11-11 |
| WO2003050370A1 | 2003-06-19 |
Next Patent: PROTECTION DEVICE FOR CYLINDER LOCK