Ladies and gentlemen, my security door can t be locked with a key, is the lock cylinder broken? lock

Is it very simple that the lock body is broken, don't you know if you try it? Remove the lock cylinder and turn it with the key to see if it goes well or not. >>>More

Hello, the anti-theft door is locked from the inside with a key, and it can't be opened from the inside without a key.

Three reasons: the first reason is that you can't open the inside with the key inserted outside The second reason, the lock plate has the function of committing theft, that is, if you go out and twist it a little more, the lock plate will ring, if a thief enters the house, he can only jump out of the window, and the big thing can't be moved. The third reason is that there is a problem inside the lock cylinder! >>>More

Is there a key in it? If the key is locked inside, the outside cannot be opened.

It turns out that there has been no cooking oil added to the inside of the lock cylinder. Edible oil will solidify and agglomerate after a long time, and it will be inserted and cannot be opened if it is not used for a period of time.