| 摘要 |
The present invention provides an improved lock device in which a slider is movable in either a locking direction or a releasing direction only when the amounts of projections of plural tumblers mounted on the slider correspond to the dimensions of plural holes punched in a lock card. When the lock card is slidingly inserted into a card groove under the release condition, the lock card successively presses a stopper disposed on the insertion side and the plural tumblers into tumbler chambers in the slider and then hits against a stopper disposed on the exit side, which projects into an adjustment groove. Here tapered tips of the tumblers are fitted into and engaged with the corresponding holes formed in the lock card, and engagement projections on the tumblers are all located in a sliding groove. The slider is thus movable together with the lock card. When the slider reaches a locked position and stops, the stopper on the exit side slides along an inclined edge of the adjustment groove and is received in the slider to allow the lock card to pass through for completion of the lock, and the stopper on the insertion side projects into the adjustment groove to prevent the lock card from sliding again in the locking direction.
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