Door: Latch Mechanism Diagram [new]

Based on the diagram's arrows indicating motion:

A square metal bar that connects the interior and exterior handles. When the handle is turned, the spindle rotates and activates the internal retraction mechanism. door latch mechanism diagram

beveled (angled) edge that allows it to retract automatically when it hits the strike plate as you push the door closed. 2. The Spindle The spindle is a square or circular metal rod that connects the internal handle to the external one. When you turn the knob, the spindle rotates, engaging the internal cams to pull the latch back. 3. The Strike Plate This metal plate is mounted on the door jamb (the frame). It features a hole where the latch bolt "seats" to hold the door in place and protects the wood from wear and tear. 4. The Internal Spring Tucked inside the latch assembly, this spring is responsible for pushing the bolt back out once you release the handle. If your door won't stay closed, a broken or worn-out spring is often the culprit. 11 sites Top 14 Door Latch Types and Their Best Uses - Magic windows Jan 12, 2026 — Based on the diagram's arrows indicating motion: A

A high-quality diagram often specifies materials. the spindle rotates

A user turns the door knob or pushes down on a lever handle.