Find the push lock or twist lock button on the inner doorknob.
How to lock your room door with your mind.
You may also need to tilt the knife a little till you find the suitable angle for moving the lock.
This should lock the door.
Lock the door from the inside.
You don t need a key to lock most doors from the inside.
Some of these devices also contain an alarm which can get triggered if anyone tries to open the door.
If your knob has a push lock.
There are professional security devices designed for this.
Block the door from the inside with a door barricade jammer or a wedge.
But there are also household items that can be used for the same purpose as i ll explain later in more detail.
You should see a small cylindrical button protruding from the center of the knob.
Apply pressure on the lock using knife and push it back in the door.
Taking the time to learn how to lock a door without a lock can help you improvise emergency locking solutions in dire times like active shooter situations and it can be the very thing that helps save your life.