Concealed Fastener Door Handle Adapter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing door handle fastening systems often result in a less aesthetically pleasing appearance due to visible fasteners, and they may not provide sufficient rigidity or secure attachment, especially for sliding doors where interference with the door frame or wall is a concern.
Innovation Solution
A concealed fastener adapter system that includes a top plate and a bottom plate with a receiving bore and slot configuration, allowing for adjustable friction to secure the door handle in place while hiding the fasteners from view, using a mortised slot and interference fit to ensure stability and concealment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fasteners are installed through the face of the handle and into the door surface, then the door handle is securely attached, but the fasteners are visible and aesthetically displeasing
Solution Approach 1:
The fastening system is divided into separate components: a top plate attached to the door surface, a bottom plate providing additional support, and fasteners that connect through the handle body rather than through the visible face. This segmentation allows the fasteners to be hidden while maintaining secure attachment.
Solution Approach 2:
The top and bottom plates serve as intermediary elements that distribute the fastening force across the door surface and handle body. The plates provide bearing surfaces for the fasteners, allowing the fasteners to engage the handle indirectly through the plates rather than directly through the visible face, thus concealing them while maintaining secure attachment.
2Object-affected harmful factors
If the door handle is recessed into the door to avoid interference, then the door maintains a low profile, but the fasteners become visible on the door surface
Solution Approach 1:
Instead of recessing the handle into the door (which would expose fasteners on the surface), the system inverts the approach by attaching plates to the surface and having fasteners engage through the handle body from the rear. This inversion allows the handle to maintain a low profile without sacrificing aesthetic appearance.
3Strength
If friction is increased to secure the door handle, then the attachment becomes more rigid, but the fastener may become difficult to install or adjust
Solution Approach 1:
The top and bottom plates are pre-attached to the door surface before the fasteners are installed. This preliminary action creates a stable framework that guides the fasteners into proper alignment and distributes the installation force, making it easier to achieve rigid attachment without excessive friction or difficulty.
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 system provides a secure, aesthetically pleasing attachment of door handles by concealing fasteners, ensuring the door handle remains flush with the door surface and preventing interference with the door frame or wall, while maintaining rigidity and ease of installation.
Implementation Method 1
A selective amount of friction may be applied to the fastener, further engaging the top plate, thereby displacing the door handle and generating a frictional interference with the bottom plate and the receiving slot, thus securing the door handle in place.
Data Source
AI summary
A door handle may be mounted to a door with concealed fasteners. The fasteners do not engage the door itself, but rather engage a top plate that is mounted to the door. The fasteners are inserted into a hidden portion of the door handle and generate an opposing force as they press against a bulging portion of the top plate to produce a force that retains the door handle in place. The force generated also urges the door handle into a bottom plate on an opposing side of the door handle. The bottom plate includes a first and second planar section. The second planar section of the bottom plate is received into a receiving slot of the door handle. As a result, the door handle is retained on the door without any visible fasteners.