Privacy Lock Assembly with Offset Toggle and Compression Springs
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Solution Overview
Problem
Conventional privacy locks lack an effective emergency exit feature that allows users to unlock the door from the inside without external assistance, and they often compromise on aesthetic design due to integrated unlocking mechanisms.
Innovation Solution
A privacy lock assembly with a spindle connecting exterior and interior portions, featuring compression springs in spring housings and a locking mechanism with a toggle that can be unlocked via a camming motion from the interior handle, allowing the locking piece to rotate and enable an emergency exit, while maintaining flexibility in handle design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a privacy lock is designed with a secure locking mechanism, then security is improved, but ease of operation for emergency exit deteriorates
Solution Approach 1:
The patent extracts the emergency exit function from the standard locking mechanism by providing a separate interior button that directly actuates the latch bolt release. This separate extraction allows the locking mechanism to remain secure while providing an independent, simple emergency exit path that does not require external keys or complex operations.
Solution Approach 2:
The lock assembly is segmented into distinct functional components: a locking mechanism for security, an emergency exit mechanism with interior button, and a latch bolt system. This segmentation allows each component to operate independently - the locking mechanism maintains security while the emergency exit mechanism provides easy access when needed, resolving the contradiction between security and emergency accessibility.
2Device complexity
If the unlocking mechanism is integrated into the handle, then device complexity is reduced, but aesthetic design flexibility deteriorates
Solution Approach 1:
The unlocking function is segmented from the handle assembly and placed in a separate interior button mechanism. This segmentation allows the handle to be designed purely for aesthetic purposes while the separate button provides the unlocking function, thus maintaining both design flexibility and functional integration without compromising either aspect.
3Ease of operation
If a toggle mechanism is used for locking, then ease of operation is improved, but device complexity increases due to offset positioning
Solution Approach 1:
The toggle is intentionally positioned offset from the central axis of the lock assembly, creating an asymmetric design. This asymmetric positioning allows the toggle to effectively engage and disengage the latch bolt through a simple rotational motion, maintaining ease of operation while the offset configuration is accommodated within the overall lock body structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a secure locked position and an accessible emergency exit by allowing the interior handle to unlock the door, ensuring users can exit without external tools, while maintaining predetermined handle orientations and aesthetic flexibility.
Implementation Method 1
An exterior spring housing and an interior spring housing may be coupled to the exterior and interior portions of the chassis. The interior spring housing and the exterior housing each have compression springs.
Data Source
AI summary
A privacy lock assembly and method of operation are provided. The lock assembly has a push button offset from the central axis of the lock assembly for locking and unlocking the assembly. The lock assembly includes compression springs to maintain integrated handles in predetermined orientations when the handles are not subject to a load.