Patent ID: 7930916
Filing Date: 2011-04-26
Classification: E05B,Y10S,Y10T

Abstract:
1. A locking device comprising: a case member having an internal space extending in an axial direction; a sleeve member disposed within and supported by the case member and axially movable in the axial direction; a plunger member disposed inside the sleeve member and supported by the sleeve member so as to be movable in the axial direction between a given standby position and a given operative position; a keyway formed inside the plunger member so as to extend in the axial direction, and a key being insertable therein from the axial direction outside of the plunger member when the plunger member is in the standby position; and an operation-selecting unit that, when an authentic key is inserted in the keyway and the plunger member moves axially from the standby position to the operative position together with the authentic key in the case member but the sleeve member does not move axially relative to the case member, operates a key-operated mechanism, and that, when an inauthentic key is inserted in the keyway and the plunger member moves axially relative to the case member from the standby position to the operative position together with the inauthentic key and the sleeve member, maintains the key-operated mechanism in an inoperative state.