This movement rotates the spindle , which is threaded through a hole in the latch case.
Below is a simplified view of a standard (the most common type in residential homes). door latch mechanism diagram
The bolt exits the strike plate in the door frame, allowing the door to swing open. This movement rotates the spindle , which is
Here is a simplified diagram of a typical door latch mechanism: This movement rotates the spindle
Once the handle is released, the spring forces the bolt back to its extended position. Common Types of Latch Mechanisms