Ordinary brass padlocks have a lock core. In addition to the hole for inserting the key, there are several round holes in the lock core. These round holes correspond to the several round holes on the lock body. A spring and 2 copper marbles of different heights. After the key is inserted, the two marbles are pushed up to different heights due to the different tooth positions. If the boundary between the two marbles in the hole is equal to the circumference of the lock core, the lock core can lock body is rotated, so the lock is opened. This is how a normal brass padlock works.
Let me talk about the principle of locking first: there are three shrapnels at the bottom of the lock cylinder. The right side of the shrapnel is fixed on the right side of a beam under the lock cylinder, and the left side extends outward. When locking, put the lock cylinder from the left side of the lock along the slot hole. Insert, the shrapnel is compressed during the insertion process. After being inserted into the lock cylinder smoothly, the shrapnel will pop out naturally. Since the size of the slot hole is just enough to insert when the shrapnel is pressed when the shrapnel is opened, it just withstands the inner wall of the lock on the left, so that the copper lock is locked smoothly, and the upper beam of the copper lock is also inserted into the slot on the right side so that the things worn on it can be locked.
Let's talk about the principle of key lock unlocking. If you understand the principle of locking, the principle of unlocking is very simple. When unlocking, insert the key with the same slot on the top from the right side. After the slot of the key is aligned with the slot of the lock cylinder, continue to push the key forward. The key moves forward along the slot. The slot of the key In the process of advancing, just presses the pop-up shrapnel tightly, so that the lock cylinder has no resistance, and it will be pushed out from the left side at once. The depth of the slot on the key can ensure that the key will not fall into the lock casing after the lock cylinder is pushed in by the key.