Faucet Handle Coupling With Annular Locking for Toolless Service
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Solution Overview
Problem
Faucet handles are difficult to service or replace due to fastener-based attachment methods, which disrupt the aesthetic quality and require additional components like friction washers to maintain proper alignment, leading to potential wobble issues.
Innovation Solution
A handle connection system that uses annular projections and channels to toollessly couple and uncouple handles from the underlying structure, eliminating the need for fasteners and maintaining consistent rotation without the use of friction washers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fasteners are used to attach the handle to the valve stem, then the handle is securely retained, but the aesthetic quality is degraded and serviceability is reduced
Solution Approach 1:
The connection system is divided into separate functional components: the handle connection system with external threads for secure attachment, and the handle with an opening that can be plugged to hide fasteners. This segmentation allows the retention function to be separated from the aesthetic surface, enabling both secure attachment and clean appearance.
Solution Approach 2:
The fastening function is extracted from the handle body and placed in a separate handle connection system that attaches to the valve stem. This allows the handle to have an uninterrupted surface while the connection mechanism operates independently, improving both aesthetics and serviceability.
2Reliability
If fasteners and plugs are used to attach the handle, then the handle is securely retained, but the uninterrupted surface is interrupted
Solution Approach 1:
The fastening components are extracted from the handle body and placed in a separate handle connection system. The handle opening can be plugged to maintain surface continuity, while the external threads on the handle connection system provide secure retention without interrupting the aesthetic surface.
Solution Approach 2:
The handle connection system acts as an intermediary between the handle and valve stem, providing the fastening function externally. This allows the handle to maintain its uninterrupted surface while still achieving secure attachment through the intermediate connection system.
3Ease of operation
If friction washers are used to maintain handle alignment, then proper rotation is achieved, but the device complexity increases
Solution Approach 1:
The friction washer function is extracted and replaced by the geometric interaction between the annular channel and handle annular projection. This eliminates the need for separate friction washers while maintaining proper rotation alignment, reducing device complexity.
Solution Approach 2:
The annular channel and handle annular projection use curved geometric surfaces to maintain alignment and facilitate rotation. The curved surfaces provide the necessary friction and guidance for proper rotation without requiring additional friction washers.
Data Source
AI summary
A process includes inserting a valve cartridge in a fitting of a yoke. The process also includes placing a ring around the fitting after inserting the valve cartridge in the fitting. The process also includes placing a nut around the fitting after placing the ring around the fitting. The process also includes threading the nut onto the fitting after placing the nut around the fitting. The process also includes tightening the nut against the ring. The process also includes pressing a handle onto the ring after tightening the nut against the ring.