The translation of tongue lock is cam lock. Tongue flippers are widely used, which can be divided into these categories according to their structures: Related lock industry articles: What is the technology of smart locks now? The difference between mechanical locks and other types of coded locks 1. Triangular tongue flipper: The lock core of this tongue flipper is solid triangle, sawtooth and square, and its key is used for * * *. They are widely used in industrial equipment, mainly made of zinc alloy, and stainless steel is used in a few occasions. 2. This lock has a large volume and seven marbles, which can reach nearly 10,000 kinds of keys, so it should be very safe. 3. Blade tongue lock: It means that the locking nail whose internal structure controls the rotation of the lock is a metal blade (commonly used copper sheet and stainless iron sheet). This tongue lock is simple in structure and easy to process. 4. Anti-theft tongue lock mailbox lock: this lock can be equipped with three-point steel bolt and connecting rod to realize the function of heaven and earth lock (connecting rod lock). It is a simple-to-install core tumbler lock with the following features: 1, unique keyhole anti-blocking device, dustproof and foreign body blocking prevention; 2, to prevent technical means to open, to prevent the master key to open; 3, the key can not be copied by individuals, and it is not available in the market; 4. Keys between locks do not open each other, and each lock can be opened with a key; 5. Simple installation and low price. This product of China Top Ten Lock Brand adopts rare earth high-energy permanent magnet material, which is small in size, strong in magnetic force, and permanent and reliable, with natural degaussing of less than 1/10000 in a hundred years. Can be customized according to customer requirements! Material and surface treatment: the lock body is made of zinc alloy, and the lock surface is polished and chrome plated; The pick tongue is galvanized steel plate. The key is a magnetic core key with chrome-plated surface.