The key to match the particular lock lifts the pins to the correct height to allow the latch the part that protrudes into the door frame to be pulled back against the spring allowing the door to open.
How does a lock on a door work.
But in more complicated systems that have several ways to lock and unlock the doors the body controller decides when to do the unlocking.
One part is fitted to the frame the static part of the door and is essentially a sturdy metal reinforcement for a hole cut into the door itself to prevent the locked door from being opened with brute force.
How do locks work.
The two most common types of locks in a home are simple key locks in a doorknob and deadbolt locks.
The body controller is a computer in your car.
In this edition of howstuffworks we ll learn just what s inside your door that ma kes it unlock we ll take apart the actuator that does the work and then we ll learn how the lock can be forced open.
Key locks contain a small cylinder that runs down the middle of the doorknob and into the door.
When the door is unlocked a part called a tang is resting fully inside of the cylinder.
But first let s see how the car keeps all its signals straight.
Door knobs are usually are equipped with a button on the inside which when pressed will trigger the spring and lock the door.
To minimize the need to use a key to leave your home these locks are designed so you can turn the doorknobs to unlock the door from the inside.
You will require one wrench to apply tension to the lock cylinder and one long pick to actually get the pins of the lock to move.
However a key is still required to open the door from the outside.
Once the key is removed the spring will automatically push the latch back out.
This method should work on most pin and tumbler locks that people normally use.
To start with you need the right tools for the job.