Universal Door Handle Chassis for Interchangeable Escutcheons
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing door handle assemblies require replacement of the entire assembly when changing escutcheon types, limiting flexibility and necessitating 'like-for-like' replacements.
Innovation Solution
A universal chassis with interchangeable escutcheons and trim plate adapters, allowing escutcheons to be removably attached without changing the chassis, using fastener engagement mechanisms and snap fit joints for secure alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a chassis is designed for use with a specific faceplate type, then the assembly provides structural integrity and proper alignment, but the user cannot change the faceplate type without replacing the entire assembly
Solution Approach 1:
The chassis is designed with a universal mounting interface that can accommodate multiple faceplate types. The mounting plate includes multiple sets of mounting holes arranged in different patterns, allowing the same chassis to securely mount various faceplate designs without requiring replacement of the chassis itself.
Solution Approach 2:
The door handle assembly is divided into separable components: the chassis (mounting plate) and the faceplate (escutcheon). The mounting interface is segmented into standardized mounting holes that can accept different faceplate configurations, enabling independent replacement of the faceplate while retaining the chassis.
2Adaptability or versatility
If the entire door handle assembly is replaced to change escutcheon type, then the correct matching components are ensured, but installation time and labor are significantly increased
Solution Approach 1:
The chassis serves as a universal mounting platform that works with multiple escutcheon types. By maintaining the same mounting interface across different escutcheon designs, the system allows users to swap escutcheons quickly without requiring complete assembly replacement, significantly reducing installation time.
3Adaptability or versatility
If multiple chassis types are manufactured to support different faceplate types, then each chassis-faceplate combination is optimized, but inventory complexity and manufacturing costs increase
Solution Approach 1:
Instead of manufacturing multiple specialized chassis types, the invention uses a single universal chassis design with a standardized mounting plate that incorporates multiple patterns of mounting holes. This approach maintains optimized chassis-faceplate compatibility while eliminating the need for multiple chassis variants, thereby simplifying manufacturing and reducing inventory complexity.
Solution Approach 2:
The mounting plate integrates multiple functions into a single component: it provides structural support, alignment references, and multiple mounting hole patterns for different faceplate types. By combining these functions into one universal chassis, the system avoids the need to manufacture separate chassis for each faceplate type.
Data Source
AI summary
A door handle assembly includes a chassis, first and second trim plates, and a latch assembly. The chassis includes an interior chassis portion and an exterior chassis portion. The interior chassis portion is configured to extend from a first side of a door and includes at least one trim engagement mechanism. The exterior chassis portion is configured to extend from a second side of a door and includes at least one trim engagement mechanism. The first trim plate is configured to removably engage the first trim engagement mechanism, optionally via a trim plate adapter. The second trim plate is configured to removably engage the second trim engagement mechanism, also optionally via a trim plate adapter. The latch assembly extends between the exterior chassis portion and the interior chassis portion. The first trim engagement mechanism and the second trim engagement mechanism are capable of removably engaging with interchangeable trim plates.