Wooden combination lock

It turns out that combination locks can be made not only from iron, but also from wood . It is unlikely that it can be used in practice, but the simple design looks quite elegant. A good project to make it a weekend. In addition, the model shows well how code locks actually work (after all, even Richard Feynman himself was interested in them).

By the way, no one bothers to make everything from iron parts on the same principle - you get a real combination lock that can be used in business!


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The author has set a goal to make a combination lock as simple as possible and seems to have succeeded: there are only 11 details in it.



At the same time, the lock does not look at all ugly, quite the opposite.

Unlike real locks, the main goal was not effective work, but visibility to show the work of the mechanism in action. Therefore, the case is made open; all entrails are visible in full view.

As in these locks, the mechanism consists of three rotors or wheels. Each has a notch. When the three grooves line up in a row, the bolt falls into the threefold groove that has learned, and the lock opens.



The front rotor is directly connected to the dial of numbers, and the rest of the movement is transmitted through the spikes. For the first digit is responsible far wheel.



Then the rotation takes place in the opposite direction until the middle wheel falls into place. In the end, only the front rotor rotates.



You can rotate both right-left-right and left-right-left. By the way, this rule also applies to conventional mechanical combination locks.

Unfortunately, detailed drawings of the wooden model are available for a fee. But from the photos and video you can quite accurately restore the size. The design is really very simple. If you play a little with wooden blanks, you get something very close to the original. Alternatively, you can estimate in advance in AutoCAD-type CAD systems, as the author did.

Naturally, the lock is scaled: make a model of any size you like.