The basic principle of mechanical lock and related basic knowledge

The basic principle of mechanical lock and related basic knowledge

The basic principle of mechanical lock
A mechanical lock refers to a device that uses a key to turn the lock cylinder so that the pin in the lock cylinder moves to the designated position, thereby unlocking or closing the lock.
The mechanical lock is composed of a lock cylinder, a lock case, a key, and a lock tongue. The lock cylinder is the core part of the mechanical lock. It is equipped with gears, pins, tongues and other structures inside. The gears and pins in the lock cylinder are controlled by the rotation of the key to lift and move, so as to realize the opening or closing of the lock tongue.

The structure of the lock cylinder
The lock cylinder is usually composed of five parts: the rotor, the keyhole, the pin, the shrapnel, and the barrel. The rotor is the core component inside the lock cylinder, including one or more gears, some lock cylinder locking tabs, anti-locking tabs, etc.
The key hole is the entrance of the lock cylinder, and the key is adapted to the structure inside the hole. By turning the key forward and backward, the height of the pin and the shrapnel changes.
The pin is the first-level protection of the lock cylinder. It is generally composed of upper, middle and lower parts. The height and position of the pin and the depth and number of the opening of the pin match the key, thus determining whether the key can open the lock.
The shrapnel is the secondary protection of the lock cylinder. Its function is to identify the difference between the correct key and the counterfeit key, block the counterfeit key, and protect the structure inside the lock cylinder from damage. The barrel body is the outer shell of the lock, which mainly includes parts such as a sealing cover, a spring, and a stopper.
Classification of locks
According to the opening method, mechanical locks can be divided into single tongue locks, double tongue locks, multi tongue locks, padlocks, drawer locks, etc.
According to the structure of the lock cylinder, mechanical locks can be divided into cylinder locks, cross core locks, keyhole locks, mechanical locks, and cylinder locks.
Mechanical combination lock, etc.
According to the lock type, mechanical locks can be divided into horizontal locks, padlocks, locks with locks, etc.
Advantages and disadvantages of mechanical locks
Mechanical locks are relatively simple, low in cost, and easy to operate, and can be well applied in some occasions. However, its structure is single, and its structural safety is not high. It is easy to be pried, drilled, and knocked open, and it is easily broken by skilled people. At the same time, mechanical locks require repair and replacement, often requiring oiling and maintenance, and possibly key replacement.
epilogue
Mechanical lock is a common anti-theft device with simple structure and low cost, and it can get better results when used properly in some occasions. However, its safety is relatively low, which tests the level of lock manufacturing technology and the safety awareness of lock users. Therefore, when choosing a mechanical lock, it should be selected according to the needs and actual conditions to further improve the anti-theft safety measures.