Development Of Locks

At the beginning of the 18th century, the cam rotary lock was invented by the Englishman D. Porter. Its key number has grown from more than 20 kinds of reed locks to more than 80 types. In the middle of the 19th century, European manufacturers modified the slide rotary lock on the basis of cam rotary lock and reed lock, and its key number can reach 1600 types.

In 1848, American L. Yale invented the bullet lock with a cylindrical pin, which has become the most commonly used lock in the world. The structure of modern bullet locks has new developments, and two-way, three-way, four-way marbles structures, as well as plane, double-sided, multi-faceted, double-row double-sided, multi-row multi-sided marbles structure and combined marbles structure, thereby greatly improving the confidentiality performance of locks, so that the number of locks from the original 2,500 through the change of "direction" and "face" to one million.

In the 70s of the 20th century, with the application of microelectronics technology, magnetic locks, infrared locks, electromagnetic wave locks, electronic card locks, Yaohan fingerprint locks, retinal locks, remote control locks, etc. appeared. These locks offer a high level of secrecy unmatched by mechanical construction. Modern locks can also be programmed in a specific system according to a set logical relationship. Modern locks can be classified by material, purpose, presence or absence of a key, security features, and construction.