Different from commercial hardware standards, civilian hardware accessories are prone to many problems here and there after being used for a long time. Especially door locks, such high-load operating components, will inevitably have some malfunctions over a long service life. Some users and friends often find that damage to door locks at home is often caused by improper use or maintenance.

Lubricating oil
Some friends often like to drop some lubricating oil into the keyhole when the door lock becomes astringent or tight. In this way, the door lock may be smooth all over immediately. However, because the oil is easy to stick to dust, the keyhole will become sticky in the future. It will be easy for dust to slowly accumulate inside and form grease, which will make the door lock more likely to malfunction.

The correct solution: sharpen some pencil powder or some candle powder, blow it into the lock core through a thin tube, and then insert the key and turn it several times.
The door doesn’t open smoothly
Sometimes, due to the gravity of the door leaf or the door hinge, the door leaf sinks, causing the door to lock or open unsmoothly. At this time, it is often very difficult to open and lock the door with a key. At this time, do not forcefully twist the key to avoid breaking the key and causing more trouble.
Correct solution: Check the cause first. If the door leaf sinks due to loose hinges, tighten the loose hinges with screws. If the door frame is deformed or irreversible due to other reasons, you can start from the door frame and expand the lock tongue accordingly, so that the door lock and door can return to normal smoothness. picture

The vast majority of anti-theft doors sold on the market across the country use Class A pinball locks with ordinary protection levels.

Class A anti-theft door locks are the most basic requirements for the safety performance of anti-theft doors set by the national competent authorities.

The opening standards for Class A locks are very low, as long as they cannot be opened within 60 seconds, they are qualified. For people who specialize in unlocking, this ordinary A-level anti-theft door lock usually only takes a dozen seconds or even a few seconds to open it.