My home door is a Security Door using this type of mechanism . The lock itself is about 20 years old and i now have a key stuck in it. The key is on the inside and will rotate almost 90° in both directions. I tried spraying some lubricant (don't have graphite handy) in the lock but the key won't budge.
This is the first time it happened, i've already tried pushing another key or screwdriver on the other side but no luck
If any of you has any tips i'll greatly appreciate it as it's 9PM and i'll have to sleep with an unlocked door :)
The actual mechanism brand is Mottura but it looks really similar to the one in the picture.
Also, the key seems to be in the default position. Turning counterclockwise will move the opening shaft slightly, but turning clockwise has no effect.