Like your car s engine under the hood this is the internal body of the lock the unseen working mechanisms inside the door.
Interior door lock assembly with longer bolt mechanisms.
While the shape and style of the external components can vary depending on the type of door knob or handle or whether you unlock the door with a traditional metal key your fingerprint or a card the internal components will always involve a spring latch or deadbolt secured with a box and strike plate.
There are two main styles of latch or bolt a spring bolt and a deadbolt.
Parts of a door lock.
There are four types.
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1 2 beveled latch with a deadlocking bar used for keyed functions.
Spring bolt a spring latch is a bolt held in place by a spring clip.
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The lock engages a bolt inside the door.
The mechanism that throws the bolt when the knob or lever is turned.
1 2 beveled latch used primarily for interior doors interior locking and non locking functions.
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Sometimes abbreviated as latch this is the type of lock that has a beveled spring operated bolt that engages when you close the door.
Parts of a door lock.
This piece of metal extends from the door into the frame and holds it closed.
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The spring is compressed to unlock the bolt and when released it snaps into a locked position.
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Insurance approved products are available and many with multiple keys.
Depending on the type of door lock which we ll get to in a moment the parts may differ in looks and how they work.
If you ever need to replace locks on your doors you ll need to know the individual names for parts their importance for the overall mechanism and how they help the other parts work to lock the door.
Door locks are designed primarily for functionality but in addition to providing security their appearance is a consideration.