A privacy lock typically works by using a simple latch mechanism that can be engaged from one side of the door, usually the interior. From the exterior, a small hole allows for emergency access using a tool to disengage the lock.
Here's a breakdown:
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Interior Locking: A knob, button, or lever on the inside of the door controls a small bolt or latch. When activated, this bolt slides into the door frame, preventing the door from being opened.
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Exterior Emergency Access: A small hole (often round or a small slot) on the exterior side allows a thin, stiff object (like a paperclip, small screwdriver, or a specialized tool) to be inserted.
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Releasing the Lock: Inserting the tool into the hole allows you to push against the locking mechanism, retracting the bolt or latch and unlocking the door. This is usually a simple pressure-based release.
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Latch Mechanism: The core function relies on a basic latch. When the privacy lock is "locked," the latch is prevented from retracting. The emergency access tool forces the latch to retract despite the "locked" state.
In summary, a privacy lock provides a way to secure a door from the inside while allowing for emergency access from the outside via a simple release mechanism.
