Hinge assembly for an appliance lid and installation method therefor
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Solution Overview
Problem
Existing consumer appliance lid hinge mechanisms experience stress during installation and servicing, leading to potential damage and uneven biasing forces that can result in scratching or misalignment.
Innovation Solution
A hinge assembly with a retractable second hinge assembly and a guide member with a sloped portion that biases the hinges into retracted positions, allowing for symmetrical engagement with the cabinet receptacles during installation, minimizing stress and ensuring proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hinge assembly uses a fixed hinge mechanism during installation, then the structure is simple, but the hinge experiences high stress and potential damage during installation and servicing
Solution Approach 1:
The hinge assembly incorporates a movable second hinge that can transition between extended and retracted positions. During installation, the second hinge retracts to allow the lid to pass over the top panel edge, reducing stress on the hinge mechanism. During normal operation, the second hinge extends to provide full hinge functionality, thus resolving the contradiction between structural simplicity and stress resistance.
Solution Approach 2:
The hinge assembly is divided into multiple independent hinge components (first hinge and second hinge) that can operate independently. The second hinge can be selectively retracted while the first hinge remains engaged, allowing the lid to be installed or serviced without subjecting the entire hinge assembly to high stress, thereby improving reliability while maintaining reasonable structural complexity.
2Ease of operation
If the hinge assembly allows full extension during installation, then the hinge provides complete functionality, but it causes misalignment and scratching of the top panel
Solution Approach 1:
The second hinge is designed to dynamically change its position based on the operational phase. During installation, it retracts to prevent the lid from catching on the top panel edge, eliminating scratching and misalignment issues. During normal use, it extends to provide complete hinge functionality, thus resolving the contradiction between ease of operation and prevention of harmful effects.
Solution Approach 2:
The second hinge is pre-positioned in a retracted state before the lid installation process begins. This preliminary action ensures that the lid can be safely positioned onto the top panel without risk of scratching or misalignment, while still allowing full hinge functionality to be achieved once the lid is properly installed.
3Manufacturing precision
If the hinge assembly uses symmetrical engagement with cabinet receptacles, then proper alignment is achieved, but the installation process becomes more complex
Solution Approach 1:
The hinge assembly employs asymmetric engagement strategies where the first hinge remains fixed and engaged with its receptacle, while the second hinge is selectively retracted during installation. This asymmetric approach simplifies the installation process compared to coordinating both hinges simultaneously, while still achieving proper symmetrical alignment of the lid once installed.
Solution Approach 2:
The hinge assembly is segmented into two independent hinge systems that can be engaged separately. The first hinge provides stable anchoring in its receptacle, while the second hinge is independently controlled to retract during installation. This segmentation allows for simpler installation procedures while maintaining precise alignment through the coordinated action of the two hinge components.
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 solution reduces stress on hinge mechanisms, prevents damage during installation and servicing, and maintains proper alignment of the lid, ensuring secure and damage-free attachment to the appliance cabinet.
Implementation Method 1
A spring of the second hinge biases the second hinge outward and into the hinge receptacle
Implementation Method 2
A sloped portion of the guide member is aligned to slope downward and toward a hinge receptacle... The sloped portion biases the second hinge to a retracted position within said lid
Data Source
AI summary
A laundry appliance includes a cabinet having a top panel that defines an aperture for selectively accessing a treatment chamber defined within the cabinet. A lid is rotationally operable relative to the aperture of the top panel between open and closed positions. Hinge assemblies extend between the lid and the top panel. The hinge assemblies include a first hinge assembly. A second hinge assembly is selectively retractable into the lid to a retracted position. A biasing member biases the second hinge assembly out to an extended position. At least the second hinge assembly is operable to the retracted position to bypass a portion of the top panel to define an installed position where the first and second hinge assemblies are engaged with respective hinge receptacles of the top panel.