Diagram | Door Locks

Date: October 26, 2023 Subject: Component breakdown and classification of residential and commercial door locks via schematic diagrams. 1. Objective The purpose of this report is to deconstruct the standard door lock into its core mechanical components using diagrammatic representation. This aids in understanding functionality, troubleshooting, and proper selection for security applications. 2. General Terminology for Diagram Reference Before examining specific lock types, the following universal components appear in most door lock diagrams:

| Component | Function | | :--- | :--- | | | The round assembly where the key is inserted; rotates to retract the bolt. | | Cam | A metal arm attached to the rear of the plug that moves the latch or bolt. | | Latchbolt | The spring-loaded, angled bolt that keeps the door closed (retracts via knob/lever). | | Deadbolt | A square, throw-only bolt (not spring-loaded) for high security. | | Strike Plate | Metal plate on the door frame; receives the bolt/latch. | | Keyway | The shaped slot in the plug that guides the key to its pins. | | Driver Pins & Spring | Located in the housing (Bible); they block the plug from turning without the correct key. | 3. Diagram Type A: Standard Cylindrical (Key-in-Knob) Lock Most common in residential interior doors. door locks diagram