Introduction and function of locks

Locks are enclosed devices that provide convenience and help protect property. Locks are also a kind of protection, it has been closely linked with our life, every household has a lock, and different places use different kinds of locks, the most used brass padlock or metal locks, because it is better in hardness, people do not worry about it when using it will break. If the key is difficult to insert and pull out one day, you may think it needs to be lubricated, which is the wrong approach, it is difficult to pull out and insert the phenomenon, it is necessary to add some lubrication, but do not add lubricant. The lock should be added graphite powder, that is, the pencil core of the powder ink, get a little in the lock hole, so back and forth open, the door lock will also be loose, and later open when there will not be difficult to open difficult to pull the phenomenon, this situation also has a relationship with the usual maintenance, usually regular maintenance of the lock.