Auxiliary Trim Locking Module for Door Handles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solutions for preventing young children from operating door handles while allowing adults to do so are either aesthetically unpleasing, not adaptable to levers, or require permanent activation and replacement of the handle assembly.
Innovation Solution
An auxiliary trim locking module with a collar, a blocking member, and a biasing mechanism that can be manually engaged to selectively prevent or allow handle rotation, allowing for easy installation and disabling of child-resistant features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotatable shell is fitted over a knob to prevent child operation, then child safety is improved, but aesthetic appearance deteriorates
Solution Approach 1:
The locking module is divided into separate functional components: a trim plate with aperture, a blocking member with projection, and a biasing mechanism. This segmentation allows the safety function to be added without requiring a complete redesign of the handle assembly, maintaining aesthetic integrity while providing child protection.
Solution Approach 2:
The blocking member acts as an intermediary element between the trim plate and the handle shank. It provides the child-safety blocking function through its projection that engages with the trim plate aperture, while being independently controllable and removable without affecting the main handle assembly.
2Reliability
If existing locking solutions are integrated into the handle assembly, then child safety is improved, but device complexity and replacement requirements increase
Solution Approach 1:
The locking functionality is separated from the main handle assembly and implemented as an independent trim plate with integrated blocking mechanism. This allows the safety feature to be added or removed without replacing the entire handle assembly, reducing complexity and cost.
Solution Approach 2:
The blocking member is designed to be dynamically controllable through manual operation, allowing it to move between blocking and non-blocking positions. This dynamic capability enables adults to override the child lock when necessary, providing flexibility without permanent complexity.
3Reliability
If a blocking member is added to prevent handle rotation, then child safety is improved, but ease of operation deteriorates
Solution Approach 1:
The blocking member provides partial blocking - it engages with the trim plate aperture to prevent child operation, but can be easily moved out of engagement by adult users who apply sufficient force. This partial action approach maintains safety for children while preserving full operational capability for adults.
Solution Approach 2:
The biasing mechanism automatically returns the blocking member to its blocking position after manual displacement, providing self-service functionality. Adults need only momentarily displace the blocking member to operate the handle, after which it automatically re-engages to maintain child safety.
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
Provides an aesthetically acceptable, adaptable, and user-selectable child-resistant mechanism for door handles, preventing children from operating the door without hindering adults, and allowing for easy installation and removal as needed.
Implementation Method 1
a biasing mechanism urging the locking member toward the distal position
Data Source
AI summary
An exemplary auxiliary trim locking module is configured for use with a handle including a shank. The handle is mounted for rotation relative to a rose having an aperture defined therein. The auxiliary trim locking module includes a collar defining an opening sized and shaped to receive the shank, a blocking member movably mounted to the collar for movement between a proximal position and a distal position, and a biasing mechanism urging the locking member toward the distal position. The blocking member includes a projection sized and shaped to be received in the aperture, and an arm operable to be manually engaged by a user to shift the blocking member between a proximal position and a distal position.