The building door lock is a lock mounted on a door and door frame of a building that needs to be opened and closed. Generally, it consists of a lock body (including  door and window lock hardware, operating mechanism and brake mechanism), as well as a lock panel, a door lock handle, a cover board, etc. The lock tongue has a slanting tongue, a square tongue, a double tongue, and a beaded tongue,a hook-shaped tongue. Lock panel is with flat mouth, left mouth, right mouth and round mouth.And the door lock handle is distinguished as a ball, bend and pull ring.
The building door lock can be divided into door lock, room lock, bathroom lock, wind proof passage lock and toilet lock according to the use situation.And can be divided into single insurance lock, double insurance lock and three safety door lock according to the safety performance. Also,can be divided into outfitting door lock , plug-in door lock and spherical door lock according to the structure characteristic.
1.Outer door lock: the lock body covers the surface of the door. The main products are single tongue single secure door lock, single tongue double safe door lock, single tongue three safe door lock, double tongue double lock head three safe door lock, multi tongue double lock head three safe door lock, etc.
2.Corrugated door lock: the lock body is embedded in the door fan from the side of the door fan. There are two kinds of the blade structure and the marbles structure. The main products are the door lock with the moving door core, the single tongue core lock, the single slant tongue core lock, the single slant tongue button insert key lock, double-tongue plug-in lock, double-tongue press-in-core lock, blade handle lock, etc.
3.Spherical door lock: beautiful appearance, easy to use, mostly used in advanced buildings.