Blind attachment interface for filter housing assembly
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Solution Overview
Problem
Existing filter housing assemblies in refrigerators face challenges in blind assembly, where aligning components without visual confirmation can be difficult due to the need to obscure internal components, leading to potential misalignment and assembly complexity.
Innovation Solution
A filter housing assembly design featuring a base unit with an inwardly tapered receiving cavity and a bezel unit with an attachment leg having a tapered foot, allowing for mutual engagement and alignment between the bezel and base units, enabling blind assembly by moving the bezel unit in a specific direction to align with the base unit's planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If internal components are obscured to hide them, then aesthetic appearance is improved, but assembly alignment becomes difficult
Solution Approach 1:
The patent employs tapered surfaces (conical geometry) on the receiving cavity and attachment foot. The taper provides curved guiding surfaces that automatically align components during blind assembly, eliminating the need for visual confirmation while maintaining aesthetic appearance through concealed fasteners.
Solution Approach 2:
The tapered attachment interface enables self-aligning blind assembly where the components guide themselves into proper alignment through the tapered surfaces during insertion. The assembly process is self-correcting, requiring no external alignment tools or visual inspection.
2Shape
If blind assembly is implemented without visual confirmation, then aesthetic appearance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The tapered surfaces provide continuous guiding contact during assembly, distributing alignment tolerances across the conical interface rather than requiring precise point-to-point alignment. This geometric approach compensates for manufacturing variations while maintaining tight final alignment.
Solution Approach 2:
The patent changes the geometric parameters of the attachment interface from flat surfaces to tapered surfaces. This parameter change transforms the alignment mechanism from requiring precise positional control to utilizing continuous surface contact that guides alignment through the taper angle, reducing manufacturing precision requirements.
3Ease of operation
If tapered attachment interface is used for blind assembly, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into the tapered attachment interface: alignment guidance, mechanical attachment, and aesthetic concealment all occur through the same geometric feature. The base unit, bezel unit, and attachment foot are integrated such that the tapered interface serves both functional and cosmetic purposes simultaneously.
Data Source
AI summary
A method for assembling a bezel unit with a base unit installed in an article includes inserting a foot of a first attachment leg extending from a first position on the bezel unit into a first receiving cavity including by movement of the bezel unit in a first direction and moving the bezel unit in a second direction normal to the first direction. Moving the bezel in the second direction causes mutual engagement between an exterior profile of the foot with an inside profile of the cavity, both the exterior profile of the foot and the inside profile of the cavity tapering inwardly in the second direction. The mutual engagement between the first exterior profile and the inside profile aligns the bezel unit with the base unit with respect to the first and second planes.