| 摘要 |
A door locking mechanism for a door assembly of the type having a door frame and a door mounted for pivotable movement between an opened and closed position with respect to the door frame, includes key-operated cylinder locks mountable on opposite sides of the door, the cylinder locks each having a tailpiece rotatable between a locking and unlocking position via key operation thereof. A bolt is mountable on the door and frame for locking the door in the frame when the door is in its closed position, the bolt being reciprocably movable between a locking and unlocking position. A lever is coupled to the bolt for reciprocably moving the bolt between the locking and unlocking positions thereof. A tumbler assembly includes a generally cylindrical central tumbler coupled to the lever which is reversely rotatable to effect movement of the lever between its locking and unlocking positions, and a pair of stub shafts are independently mounted for free limited rotation in opposite ends of the central tumbler, each of which is coupled to a tailpiece of one of the cylinder locks. Male-female interlock elements are associated with the central tumbler and stub shafts to permit the stub shafts to rotate the central tumbler to, in turn, effect movement of the lever. The stub shafts, in turn, are rotated independently and alternatively of one another via the tailpiece of the cylinder lock coupled thereto upon key operation thereof, whereby the door may be unlocked and locked independently via either cylinder lock without disturbing the position or causing movement of the other cylinder lock.
|
