| 摘要 |
A double lock cylinder comprising: thumb-turn 114 permanently coupled with rotary cam 106 via slots 141 and lugs 139; a key cylinder on a second side selectively coupled to the cam via clutch 109 wherein protruding lug 132 of a key actuated drive dog 120 selectively engages in cam slot 142 and key cylinder slot 146. Drive dog 120 of the clutch is biased toward the key cylinder wherein it is disengaged from the cam by a first biasing means 122 and further comprises a movable plunger 121 biased toward the key cylinder by means 123. If the thumb-turn and cam are mis-aligned with the key cylinder upon insertion of a key, the key moves the plunger 121 away from the cylinder 104 wherein cylinder 104 and drive dog 120 rotate until protrusion 132 is aligned with cam slot 142; the drive dog then slides into engagement with the cam due bias 123 of plunger 121 preferably being a stiffer spring 123 than drive dog spring 122; plunger 121 and spring preferably acting within a bore of the drive dog. |
