Hinge assembly for an appliance lid and installation method therefor
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Solution Overview
Problem
Existing hinge assemblies for appliance lids often experience uneven biasing forces during installation, leading to potential damage to the lid and the appliance cabinet due to unbalanced movement, which can result in scratching or other forms of damage.
Innovation Solution
The use of a sloped guide member or structure that biases the second hinge assembly into a retracted position, allowing the first and second hinge assemblies to be simultaneously engaged with respective hinge receptacles, thereby minimizing stress and ensuring proper alignment and secure installation without damaging the appliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hinge assemblies are engaged with the hinge receptacles during lid installation, then the lid is securely attached to the cabinet, but uneven biasing forces cause damage to the lid and cabinet
Solution Approach 1:
The sloped guide member is positioned on the cabinet before lid installation to pre-establish the force distribution pathway. The guide member's sloped surface is aligned to slope downward and toward the hinge receptacle, creating a predetermined path that guides the hinge assembly during installation and distributes biasing forces evenly from the start of the engagement process
Solution Approach 2:
The sloped guide member acts as an intermediary component between the hinge assembly and the cabinet during installation. It mediates the interaction by providing a controlled interface that translates the biasing force into balanced movement, preventing direct uneven force application that would cause damage to the lid or cabinet
2Ease of manufacture
If the second hinge assembly is in an extended position during installation, then the hinge is engaged with the hinge receptacle, but unbalanced movement causes scratching or damage
Solution Approach 1:
The sloped guide member is pre-positioned on the cabinet with its sloped surface aligned to slope downward and toward the hinge receptacle. This preliminary arrangement ensures that when the lid is installed, the guide member automatically guides the second hinge assembly along a controlled path, distributing forces evenly and preventing scratching or damage before the hinge is fully engaged
Solution Approach 2:
The sloped guide member changes the directional parameters of the biasing force applied to the second hinge assembly. By providing a sloped surface rather than a vertical or horizontal interface, it transforms the force vector to create balanced movement that engages the hinge while preventing contact damage to surrounding surfaces
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
This method ensures a balanced and secure installation of the lid, reducing the risk of damage to the lid and the appliance cabinet by evenly distributing biasing forces and maintaining alignment with the central axis, thus preventing unintended engagement and damage.
Implementation Method 1
A sloped portion of the guide member is aligned to slope downward and toward a hinge receptacle
Implementation Method 2
A spring of the second hinge biases the second hinge outward and into the hinge receptacle
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.