| 摘要 |
The safe door comprises a circular body with a recess formed in one face defining a cylindrical wall. This wall has radial bores passing therethrough for guiding locking bolts received in the bores between extended locked positions and retracted open positions. A cam plate is positioned in the recess and includes peripheral cam slots coupled to the inner ends of the bolts. The arrangement is such that rotation of the cam plate between first and second positions will retract and extend the bolts simultaneously. Features of the invention include providing a central opening in the cam plate with notches so that the same can be driven between its first and second rotated positions by a cam plate driver centrally located which driver in turn supports the combination lock components. The clearance between appropriate driving lugs received in the notches is greater than the clearance between the outer edge of the cam plate and the inner wall of the door recess such that lateral movement of the cam plate resulting from radially inwardly directed blows on any one of the bolts will result in the diametrically opposite portion of the cam plate engaging the inner wall of the recess before it will engage any of the combination lock components disposed within the central opening of the plate thereby avoiding damage to these components.
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