The anti theft door lock can t be closed, so it s broken

There are several possibilities that the security door cannot be opened. >>>More

There will be a lock cylinder inside the door lock of each security door, if the lock of the security door is broken, and you don't want to replace the whole door, then you can use some tools to disassemble the lock, find the lock cylinder inside, that is, the one next to the deadbolt, that is, the lock cylinder, unscrew it, re-open a lock cylinder with similar specifications and replace it, and its price is not very expensive. >>>More

The broken anti-theft door lock is more complicated, and this is to be dealt with by a professional maintenance master.

I asked for someone to change me and told him what you wanted.

You will observe the spherical lock, the front of the keyhole is outside the door, the other end is the door, the end of the door near the back cover where there is a small hole, there is a protrusion inside, you take a small screwdriver to push the protrusion inward, and at the same time the spherical object back back, you can remove the back ball, and then reverse twist the back cover, and remove it, and then you take a Phillips screwdriver to unscrew the round spacer, so that you will just open the spherical trivial disassembly! Now you can start to install the lock: you put the tongue of the lock (that is, the cylindrical object on the top of the box on it, and there is a square iron sheet with two holes on the top of it) into the hole on the side of the door, and then take the ball in front of it in your hand, and put the other end in the hole outside the door and stuff it into the room, and at the same time make the gap in the lock body align with the fork behind the lock tongue, and then buckle the round gasket after stuffing it into place, and tighten the screws, then screw the back cover, and finally, align the back ball with the lock and push it on. When pushing up, you should also turn it slightly clockwise, and remember that there is also a small gap in the back ball, and you should aim it in the direction of the small hole with a protrusion! >>>More