The anti theft door of the community uses a decorative key, and what should I do if I can t pull it

Is it lead powder, or small particles sharpened by a pencil, graphite is a common lubricant for lubricating precision machinery, it stands to reason that this will not happen, if the outside does not appear to be stuck, but the inside appears, then do you often use the inner keyhole? Or is this just the case? >>>More

The marble room in the pit corresponding to the different depths of the A (decoration key) and B key has a special structure and is equipped with a 1mm steel ball between the upper and lower marbles. When the A key is used, the height of the lower marble in the marble chamber plus the height of the small steel ball is just flush with the lock cylinder, so the lock cylinder can be unlocked by twisting the lock cylinder with the A key; When using the B key, just the small steel ball can be pushed out of the lock cylinder, that is to say, the lower bead and the lock cylinder are flush at this time, so the B key can also be twisted to open the lock cylinder (this principle is the same as the mother and son key system), but when the lock cylinder rotates at a certain angle, the small steel ball will be affected by the action of the spring spring, and fall into the blind hole that is cleverly designed on the lock cylinder in advance (this is the difference with the key system), some people call this small blind hole a trap, very appropriate. The diameter of this blind hole is larger than the small steel ball, but smaller than the diameter of the marble, otherwise the marble will fall and the lock cylinder will be stuck and cannot be unlocked. >>>More

Don't use force, because the lock cylinder inside is a little astringent, you shake it with your hands, try to open it, don't use force, otherwise the key will break, after opening, drop some sesame oil on the key live cooking oil and twist it repeatedly, there will be no such problems in the future,

You can pull it out as long as you plug it in, or you can ask the family to open the door for you, and then you can pull it out by removing the handle and cylinder with a screwdriver.

It doesn't matter what kind of lock you use, it depends on what kind of lock you use, our combination lock is automatically insured after the door is closed.