| 摘要 |
A combination lock having a plurality of dials and clutches arranged to control a lock shackle is disclosed. Each of the dials is mounted on a different clutch to form a dial-clutch pair. The clutch has a protrusion and the dial has an open slot dimensioned to receive a protrusion and a plurality of faulty notches. The protrusion is so located that when the lock is in the lock mode, the protrusion in each of the dial-clutch pairs is disengaged from the open slot, allowing the dial to rotate relative to the clutch. Since the clutches do not turn along with the dials and the faulty notches look similar to the open slot, it would be difficult for an intruder to pick the lock by peeking the protrusion of the clutches while rotating the dials. |
