When primitive people lived in caves, for the sake of safety, they sometimes wanted to promote stones to block the caves, so they could not prevent thieves but beasts. After the emergence of private ownership, thieves appeared, so locks were born.

    More than 3000 years ago, China had locks. However, the earliest lock had no organs, but was shaped by tigers and other fierce animals. If you want to frighten the thief, it can only be said that it is a symbolic lock.

    It is said that Luban was the first person to lock in the organs of the people. As reflected in the unearthed cultural relics and written records, the ancient lock is acted by two springs of spring spring. So far, this spring is still in use.

    In foreign countries, although the ancient Greeks have found a very reliable lock, but the key is to be bigger, to shoulder everything, the general family is difficult to popularize. The ancient Indians made a bird-shaped "fan lock", and the key hole hidden in the wings could wither. The rise of modern locks was the invention of "welding fishing lock" in Britain in the 18th century. We are now widely used in ball locks. It was invented by Yale in 1860.

    The invention of the key than later ancient Egypt is the first key used in the world. Their lock is a wooden door bolt inserted into a slot with a wooden bolt at the top of the slot. When the plug is inserted into the slot, the wood plug will be inserted into the hole of the bolt. In this way, the bolt will be strong and you will have to open it with a key.

    Because the Egyptian lock can only be used on the side of the door bolt, which is not conducive to the flexibility of opening and closing, the Greeks also developed a lock from the other side of the lock. The key made by the Greeks was a curved rod shaped like a scythe on a small farm. But some keys can reach up to three feet and have to be moved over the shoulder, quite heavy.

    The Romans were arguably the most complex locksmiths in ancient times. They did a lot of research on the standard of keys and knew that the fingernails at the end of keys were cut into various shapes.