| 摘要 |
A locking system is provided for doors with a bolt unit installed on the inside and a control unit installed on the outside of the door. The bolt unit has a casing enclosing a bolt displaceable between a projected, locking position and a withdrawn, unlocking position. A solenoid device has an armature being displaceable between electromagnetically induced attracted and repelled positions. Linkage means are coupled between the armature and the bolt to drive the bolt between the unlocking and locking positions, respectively. A pass code may be entered into the control unit, and in response, a solenoid may be actuated by a current pulse into the unlocked position of the bolt. In addition, a reverse current pulse actuates the solenoid into a locked position of the bolt.
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