1. padlock: it is divided into copper padlock, iron padlock and password padlock, and its main specifications are 15, 20, 25, 30, 40, 50, 60 and 75 mm.
2. Drawer lock: It is divided into all-copper drawer lock, copper drawer lock, aluminum core drawer lock and left and right cabinet door lock, and the main specifications are φ22.5mm and 16 mm. ..
3. Pinball locks: divided into single safety locks, double safety locks, three safety locks and multiple safety locks.
There are basically two kinds of locks, one is wooden lock and the other is metal lock. The manufacture of wooden locks must go through the technological process of sawing, splitting, drilling, planing and drilling. Metal locks need smelting, gold, silver, copper, iron and blank casting, cutting, welding, riveting, drilling and filing.
Lock classification:
1, entrance door lock
Also known as anti-theft lock. The entrance door is the door of every family and the watershed outside the home. It must have a special function, that is, it can play the role of insurance and protection.
2. The door lock in the room
Generally refers to the bedroom lock. There is a safety function in the room, and the hand lock or ball lock with the same function can be opened with a key outside the room.
3. Bathroom door lock
It is characterized in that the door can be locked inside, and there is an emergency opening device outside, with red and green display, or a small hand lock with "occupied" and "unmanned" display or a ball lock with the same function.
China locks in past dynasties are rich in forms and contents; From wooden locks in Neolithic age to iron locks in Xia and Shang dynasties; From the metal lock in the Spring and Autumn Period and the Warring States Period to the iron three-reed lock in the Qin and Han Dynasties; From bronze locks in the Northern Wei Dynasty to fish locks and gold-plated locks in the Tang Dynasty; From the Fang locks in Song Dynasty to the hidden locks, coded locks and all kinds of characters and animal locks in Ming and Qing Dynasties, it shows the profoundness of China's lock culture, and the locks of ethnic minorities such as the Fang locks of Salar nationality, the Fang locks of Naxi nationality and the primitive wooden locks of Yi nationality are more unique.