The workings of the lock--secretly telling you the little secret of "inner" lock

Keys and locks are indispensable things in our lives, homes, shops, offices and so on where the entrance and exit from needless to say, drawers, vaults, safes, mailboxes, as well as bicycles, motorcycles, automobiles and other objects, need to use locks and keys ...

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Locks and keys are important things to keep our possessions and lives, so mastering the right knowledge about locks and keys is very important for a safe and secure life.

locks

The earliest prototype of the lock goes back to BC, which is rumored to have found a wooden lock in the ruins of the Yangshao culture, and the earliest locks in the West were Egyptian locks and belonged to lock. Although the most common is the cylindrical lock, but in medieval Europe more commonly used is the convex block lock, the structure made of simple padlock is now commonly used.

The Egyptian locks about 5,000 years ago are now considered to be the oldest locks.

Locks and keys have a wide assortment of methods, which are mainly classified according to the lock structure. Now used in the lock, mainly can be divided into convex block lock, rod lock, cylinder lock and several other.

The convex block locks were made in ancient Roman times and are now used in padlock and simple backpack locks.

When it comes to construction, there is an obstacle called a bump in the lock, and if it is the correct key, it can be formed through the void shape on the key, without touching the convex block and rotating smoothly. Convex block Lock structure

The principle of the convex block lock is very simple, if the shape is too simple, then it is easy to open the lock, it is easy to make a spare key, even the creation of a universal key is not difficult. So in order to make it difficult to pry the lock and duplicate the key, the shape of the convex block lock has to be made more complicated. 15~16 century made in Italy by the convex block lock

Pole lock is about 18th century, invented by the British. Now in the padlock, the drawer and the relatively early automatic door are still in use.

Inside the lock is known as the rod Lock spring plate-like obstacle, the lock spring has a groove, there is also an H-shaped groove, the latch has a raised part, in this slot.

The key is inserted into the keyhole, the key is rotated, the bulge on the key will lift the lock spring and continue to rotate the key so that the bump on the latch passes through the H slot to allow the latch to move. If it is not the right key, there is no way to let the bump smoothly through the H slot, you can not open the.

Generally have 3 rod lock spring Even if more, reach 5 pieces is very safe.

The cylindrical lock is divided into outer barrel and inner cylinder, the outer cylinder fixed lock core, while the inner barrel sets the lock hole, sets the shoji between two cylinders, does not have the key or the key error condition, the inner tube cannot rotate, only all shoji all bits in the correct position, the inner cylinder can rotate.

The cylindrical lock is divided into several kinds according to the Shoji shape and movement principle. Representative include Blade Lock, lock, rotating disc lock, magnetic lock.

Is the use of reed as a shoji cylinder lock, the earliest leaf lock reed is round, shape and principle similar to the rotating disc lock, and the current blade lock slightly different, in addition to the English tube now the blade lock is called Wafer Tumbler lock.

The blade is locked in the middle of the inner cylinder and the outer barrel when the key is not inserted, and only after inserting the correct key can the reed be lowered (or raised, and there is a rise and drop) into the inner tube, thereby rotating the inner cylinder.

Blade lock structure is relatively simple, security is also low, but also widely used (drawer lock, Mailbox Lock), so the thief is more preferred lock species.

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