A general
waterproof padlock has a lock core. In addition to the hole for inserting the key, the lock core has several round holes. These round holes correspond to the round holes on the lock body. A spring and 2 can be placed in the lock core. Copper marbles of different heights. After the key is inserted, due to the different tooth positions, the two marbles will be topped with different heights. If the boundary of the two marbles in all the holes is the same as the circumference of the lock core, the lock core can be in The inside of the lock body turned, so the lock opened. This is how the general waterproof padlock works.
